Marine algal flora of Pico Island, Azores

Abstract

Background

The seaweed flora of Pico Island (central group of the Azores archipelago) has attracted interest of researchers on past occasions. Despite this, the macroalgal flora of the island cannot be considered well-known as published information reflects only occasional collections. To overcome this, a thorough investigation encompassing collections and presence data recording was undertaken. Research under the Campaigns “AÇORES/89”, “PICO/91”, “PICOBEL/2007” and “LAUMACAT/2011” covered a relatively large area (approximately 39 km²) around the island, encompassing the littoral and sublittoral levels down to about 40 m around the Island.

This paper improves the knowledge of the Azorean macroalgal flora at local and regional scales by listing taxonomic records and providing information on the ecology and occurrence of each species present on the Island’s littoral.

New information

A total of 4043 specimens (including taxa identified only to genus level) belonging to 303 taxa of macroalgae are registered, comprising 197 Rhodophyta, 53 Chlorophyta and 53 Ochrophyta (Phaeophyceae). From these, 225 were identified to species level (142 Rhodophyta, 41 Chlorophyta and 42 Ochrophyta), encompassing 110 new records for the island (69 Rhodophyta, 20 Chlorophyta and 21 Ochrophyta), three Macaronesian endemisms (Botryocladia macaronesica Afonso-Carillo, Sobrino, Tittley & Neto; Laurencia viridis Gil-Rodríguez & Haroun; Codium elisabethiae O. C. Schmidt), 14 introduced and 25 species with an uncertain status.

Introduction

The Azorean algal flora, considered cosmopolitan with species shared with Macaronesia, North Africa, the Mediterranean Sea, Atlantic Europe and America (Tittley 2003, Tittley and Neto 2006,Wallenstein et al. 2009), has been considered relatively rich when compared to that of other remote oceanic islands (Neto et al. 2005, Tittley and Neto 2005, Wallenstein et al. 2009). Even so, it is worth mentioning that the published information (approximately 400 species, Freitas et al. 2019) reflects data from only a few of the nine islands, since not all of them have been thoroughly investigated. To overcome this and improve the understanding of the archipelago’s seaweed flora, an effort has been made by local investigators over the past three decades and research on the marine macroalgae flora has been conducted on several of the less-studied Azorean islands. This paper comprises both physical and occurrence data and compiles the gathered information from macroalgae surveys developed in Pico Island mainly by the Island Aquatic Research Group of the University of the Azores (https://ce3c.ciencias.ulisboa.pt/sub-team/island-aquatic-ecology). It aims to constitute a practical resource for biological studies, such as systematics, diversity and conservation, biological monitoring, climate change and ecology and also for academics, students, government, private organisations and the general public.

General description

Purpose

By listing taxonomic records for Pico and presenting general information for each taxon occurrence on the Island’s littoral, this paper addresses several biodiversity shortfalls (see Cardoso et al. 2011, Hortal et al. 2015), namely the need to catalogue the Azorean macroalgae (Linnean shortfall) and improve the current information on their local and regional geographic distribution (Wallacean shortfall), as well as on species abundances and dynamics in space (Prestonian shortfall).

Project description

Title

Marine algal (seaweed) flora of Pico Island, Azores

Personnel

Collections were conducted and occurrence data recorded during several years (1989-2018) under the coordination of Ana I. Neto. Main collectors were Abel Sentiés, Ana Costa, Ana I Neto, André Amaral, António Brigos, Catarina Santos, Daniel Torrão, David Villegas, Edgar Rosas-Alquicira, Edward Hehre, Emanuel Xavier, Eunice Nogueira, Francisco Wallenstein, Gustavo Martins, Heather Baldwin, Inês Neto, José M. N. Azevedo, Ian Tittley, Karla Leon Cisneros, Leila Bagaço, Maria Machín-Sánchez, Marlene Terra, Mutue Toyota Fujii, Nuno Álvaro, Patrícia Madeira, Raul Coma, Raul Neto, Richard Fralick, Rita Patarra, Ruben Afonso, Ruben Couto, Sílvia Escarduça and Valeria Cassano.

Several taxonomists contributed for the species identification: Abel Sentiés, Ana I. Neto, Edgar Rosas-Alquicira, Edward Hehre, Francisco Wallenstein, Heather Baldwin, Karla Leon Cisneros, Ian Tittley, Maria Machín-Sánchez, Marlene Terra, Mutue Toyota Fujii, Richard Fralick, Ruben Couto and Valeria Cassano.

Voucher specimen management was mainly undertaken by Afonso Prestes, Ana I. Neto, Eunice Nogueira, Natália Cabral and Roberto Resendes.

Study area description

Located in the North Atlantic, roughly at 38°43′49″N, 27°19′10″W, the Azores comprise nine islands and several islets spread over 500 km, in a WNW direction (Fig. 1). The climate is temperate oceanic, with regular and abundant rainfall, high levels of relative humidity and persistent winds, mainly during the winter and autumn seasons (Morton et al. 1998). The islands lack a continental shelf, thus presenting a restricted coastal extension and deep waters occur within a few kilometres offshore. Shore geomorphology varies considerably with high cliffs in some places and rocky cobble/boulder beaches elsewhere (Borges 2004), the tidal range is small (< 2 m, see Hidrográfico 1981) and coasts are subjected to swell and surge most of the year.

Figure 1.

The Azores, its location in the Atlantic and Pico Island highlighted in black (by Nuno V. Álvaro).

Pico (in black in Fig. 1), of approximately 447 km² and dominated by its 2351 m tall mountain, is the second largest and the youngest island of the Azores archipelago, composed of basaltic volcanic deposits less than 300,000 years old (Cruz and Oliveira 2001). The Island's coastline is approximately 126 km long, generally devoid of high cliffs and consists mainly of irregular extensions of bedrock, presenting a variety of stack, arch and gully formations due to its recent volcanic origin. Intertidal platforms, occasionally dissected by channels and gullies, are mostly easily accessible by land and exhibit considerable variation in width (Wallenstein et al. 2009). Important features and habitats at this shore level are rock pools. These differ in shape and size and are a stressful environment due to the changes in salinity caused by either evaporation or dilution during low tides. They often recreate a shallow subtidal habitat and contain a rich diversity of marine life. A few shores consist of irregularly rounded boulders or cobles between which coarse sand or gravel may be retained. Sandy shores are rare (Neto pers. observ.).

The rocky-shore communities of Pico, like all over in the Azores, are dominated by macroalgae at both intertidal and shallow subtidal levels (Neto et al. 2005). At intertidal levels, a distinct zonation pattern is evident with a higher zone dominated by invertebrates (littorinids and chthamalid barnacles, in which patches or fringes of the algae Fucus spiralis Linnaeus and Gelidium microdon Kützing can occur (Fig. 2). This is followed by a mid-shore zone covered by algal turfs (growth forms of either diminutive algae or diminutive forms of larger species that create a dense, compact mat 20-30 mm thick, Fig. 3). Depending on the shore, turf can be monospecific (of either Caulacanthus ustulatus (Mertens ex Turner) Kützing, Centroceras clavulatum (C. Agardh) Montagne or Gymnogongrus) or multispecific and composed of soft algae (e.g. Centroceras clavulatum, Chondracanthus and Laurencia) usually growing as epiphytes over articulate calcareous forms (e.g. Ellisolandia and Jania). The lower zone is mainly dominated by calcareous crusts (first strata), covered by corticated macrophytes (e.g. Ellisolandia elongata (Fig. 4), Pterocladiella capillacea, Treptacantha abies-marina (S.G.Gmelin) Kützing). Mainly during spring and summer, considerable amounts of the introduced Asparagopsis armata Harvey can be seen at this level. Subtidally, algal communities are mainly characterised associations of two or three frondose macrophytes, for example, Dictyota, Halopteris and Zonaria tournefortii (J.V.Lamouroux) Montagne (Fig. 5).

Figure 2.

Littorinids, chthamalid barnacles and the algae Fucus spiralis and Gelidium microdon at the high intertidal (by the Island Aquatic Ecology Subgroup of cE3c-ABG).

Figure 3.

Mid-shore intertidal levels covered by algal turfs (by the Island Aquatic Ecology Subgroup of cE3c-ABG).

Figure 4.

Ellisolandia elongata at lower intertidal levels (by the Island Aquatic Ecology Subgroup of cE3c-ABG).

Figure 5.

Frondose macrophytes (Halopteris spp., Zonaria tournefortii and Dictyota spp.) at the subtidal level (by the Island Aquatic Ecology Subgroup of cE3c-ABG).

Design description

The algae referred to in this paper were collected during field studies at littoral and sublittoral levels down to approximately 40 m around Pico Island. Each sampling location was visited several times and, on each occasion, a careful survey was made covering much of the area. Presence/absence data were recorded for all known species and whenever an unknown or potential new species was found, it was collected, assigned an individual registration number and vouchers were deposited at the AZB Herbarium Ruy Telles Palhinha, based at the Faculty of Sciences and Technology of the University of the Azores.

Funding

This study was mainly financed by the following projects/scientific expeditions:

• Campaign AÇORES/89, under the Expedition Azores/89, Departamento de Oceanografia e Pescas da Universidade dos Açores, July 1989;

• Expedition PICO/91, Ilha do Pico, Açores, Departamento de Biologia da Universidade dos Açores Ilha do Pico, Açores, June 1991;

• Campaign PICOBEL/2007, under the project “PICOBEL: Coastal benthic communities of Pico Island: characterization and monitoring”. 2007- 2008. The Azores Regional Government;

• Campaign LAUMACAT/2011 under the project “LAUMACAT: Diversity and phylogenetic relationships on the benthic marine algae with pharmacological potencial: the Laurencia complex (Rhodophyta) in Macaronesian archipelagos, tropical and subtropical Atlantic”. Phase II. 2011 - 2014. General Direction for Research and Management: Research Projects. Spanish Government;

• Project “ACORES-01-0145-FEDER-000072 - AZORES BIOPORTAL – PORBIOTA. Operational Programme Azores 2020 (85% ERDF and 15% regional funds);

• Portuguese National Funds, through FCT – Fundação para a Ciência e a Tecnologia, within the projects UID/BIA/00329/2013, 2015 - 2018 and UID/BIA/00329/2019 and UID/BIA/00329/2020-2023;

• Portuguese Regional Funds, through DRCT – Direção Regional da Ciência e Tecnologia, within several projects, since 2013;

• CIRN/DB/UAc (Research Centre for Natural Resources, Universidade dos Açores, Departamento de Biologia);

• CIIMAR (Interdisciplinary Centre of Marine and Environmental Research, Porto, Portugal).

Sampling methods

Study extent

This study covers a relatively large area, approximately 39 km², encompassing littoral and sublittoral levels down to approximately 40 m around the island (Table 1, Fig. 6).

Table 1.

Pico Island sampling sites information.

Location N0	Location ID	Municipality	Locality	Latitude / Longitude	Littoral zone
1	PIX_LP_LPlac	Lajes do Pico	Lajes do Pico|Lagoa de Cima	38.398018, -28.254506	Subtidal
2	PIX_LP_LPMbsp	Lajes do Pico	Lajes do Pico|Maré|Baía de S. Pedro	38.391826, -28.251878	Intertidal
3	PIX_LP_LPMbsp	Lajes do Pico	Lajes do Pico|Maré|Baía de S. Pedro	38.391602, -28.251087	Subtidal
4	PIX_LP_LPMpb	Lajes do Pico	Lajes do Pico|Maré|Ponta da Barra	38.389773, -28.25225	Intertidal
5	PIX_SR_CPpi	São Roque	Cais do Pico|Piscina	38.523888, -28.31165	Intertidal
6	PIX_LP_LPLa	Lajes do Pico	Lajes do Pico|Lagido	38.39961, -28.255085	Intertidal
7	PIX_LP_LPLa	Lajes do Pico	Lajes do Pico|Lagido	38.399708, -28.255538	Subtidal
8	PIX_LP_LPMbsp	Lajes do Pico	Lajes do Pico|Maré|Baía de S. Pedro	38.391602, -28.251087	Subtidal
9	PIX_LP_LPMpb	Lajes do Pico	Lajes do Pico|Maré|Ponta da Barra	38.390439, -28.251473	Intertidal
10	PIX_LP_LPMpp	Lajes do Pico	Lajes do Pico|Maré|Poça do Pano	38.390439, -28.251473	Intertidal
11	PIX_LP_LPMpp	Lajes do Pico	Lajes do Pico|Maré|Poça do Pano	38.390439, -28.251473	Subtidal
12	PIX_LP_CNpo	Lajes do Pico	Calheta do Nesquim|Porto	38.402234, -28.078158	Subtidal
13	PIX_LP_SCp	Lajes do Pico	Santa Cruz|Porto	38.405086, -28.185822	Subtidal
14	PIX_MA_SMp	Madalena	São Mateus|Porto	38.43023, -28.463406	Subtidal
15	PIX_LP_CNpo	Lajes do Pico	Calheta do Nesquim|Porto	38.40219, -28.079374	Intertidal
16	PIX_LP_CNpo	Lajes do Pico	Calheta do Nesquim|Porto	38.402234, -28.078158	Subtidal
17	PIX_LP_Fc	Lajes do Pico	Feteira|Calheta	38.402428, -28.067472	Subtidal
18	PIX_LP_LPc1	Lajes do Pico	Lajes do Pico|Controlo 1	38.395374, -28.256297	Intertidal
19	PIX_LP_LPc2	Lajes do Pico	Lajes do Pico|Controlo 2	38.392892, -28.255585	Intertidal
20	PIX_LP_LPc3	Lajes do Pico	Lajes do Pico|Controlo 3	38.390764, -28.255038	Intertidal
21	PIX_LP_LPc4	Lajes do Pico	Lajes do Pico|Controlo 4	38.392892, -28.255585	Intertidal
22	PIX_LP_LPc5	Lajes do Pico	Lajes do Pico|Controlo 5	38.392892, -28.255585	Intertidal
23	PIX_LP_LPc6	Lajes do Pico	Lajes do Pico|Controlo 6	38.392892, -28.255585	Intertidal
24	PIX_LP_LPfb	Lajes do Pico	Lajes do Pico|Fabrica baleia	38.398098, -28.255913	Intertidal
25	PIX_LP_LPLa	Lajes do Pico	Lajes do Pico|Lagido	38.39961, -28.255085	Intertidal
26	PIX_LP_LPMpb	Lajes do Pico	Lajes do Pico|Maré|Ponta da Barra	38.38958, -28.252883	Subtidal
27	PIX_LP_LPMpp	Lajes do Pico	Lajes do Pico|Maré|Poça do Pano	38.390439, -28.251473	Intertidal
28	PIX_LP_LPpc	Lajes do Pico	Lajes do Pico|Ponta do Castelete	38.386303, -28.253616	Subtidal
29	PIX_LP_Pm	Lajes do Pico	Piedade|Manhenha	38.410566, -28.036926	Intertidal
30	PIX_LP_Pm	Lajes do Pico	Piedade|Manhenha	38.41154, -28.028848	Subtidal
31	PIX_LP_PN	Lajes do Pico	Pontas Negras	38.408753, -28.164838	Intertidal
32	PIX_LP_PN	Lajes do Pico	Pontas Negras	38.406176, -28.158753	Subtidal
33	PIX_LP_Ppc	Lajes do Pico	Piedade|Porto do Calhau	38.439663, -28.055835	Intertidal
34	PIX_LP_SB	Lajes do Pico	Santa Bárbara	38.394346, -28.198255	Subtidal
35	PIX_LP_Sbpa	Lajes do Pico	Santa Bárbara|Ponta do Arrife	38.388247, -28.218223	Subtidal
36	PIX_LP_SCpi	Lajes do Pico	Santa Cruz|Piscinas	38.404764, -28.187053	Intertidal
37	PIX_LP_Sf	Lajes do Pico	Silveira|Fonte	38.412468, -28.284707	Subtidal
38	PIX_LP_Sf	Lajes do Pico	Silveira|Fonte	38.412468, -28.284707	Subtidal
39	PIX_LP_SJp	Lajes do Pico	São João|Porto	38.413619, -28.335026	Intertidal
40	PIX_LP_SJp	Lajes do Pico	São João|Porto	38.41324, -28.334801	Subtidal
41	PIX_MA_CA	Madalena	Cabrito	38.55817, -28.390065	Subtidal
42	PIX_MA_CAC	Madalena	Cachorro	38.556193, -28.44759	Subtidal
43	PIX_MA_GU	Madalena	Guindaste	38.445879, -28.502033	Intertidal
44	PIX_MA_MAc	Madalena	Madalena|Canal	38.535844, -28.549904	Subtidal
45	PIX_MA_MAcm	Madalena	Madalena|Cais do Mourato	38.558712, -28.481251	Intertidal
46	PIX_MA_MAi	Madalena	Madalena|Ilhéus	38.535854, -28.545742	Subtidal
47	PIX_MA_MAp	Madalena	Madalena|Porto	38.534214, -28.530273	Intertidal
48	PIX_MA_MApi	Madalena	Madalena|Piscina	38.533837, -28.534756	Intertidal
49	PIX_MA_mi	Madalena	Mirateca	38.448621, -28.511449	Subtidal
50	PIX_MA_MOpc	Madalena	Monte|Porto do Calhau	38.486345, -28.538979	Intertidal
51	PIX_MA_MOpo	Madalena	Monte|Pocinho	38.494812, -28.540192	Intertidal
52	PIX_MA_SCp	Madalena	São Caetano|Porto	38.425816, -28.421585	Intertidal
53	PIX_MA_SCp	Madalena	São Caetano|Porto	38.425656, -28.421382	Subtidal
54	PIX_MA_SMp	Madalena	São Mateus|Porto	38.430824, -28.462433	Intertidal
55	PIX_SR_CPpi	São Roque	Cais do Pico|Piscina	38.523888, -28.31165	Intertidal
56	PIX_SR_CPpi	São Roque	Cais do Pico|Piscina	38.52502, -28.312802	Subtidal
57	PIX_SR_PrN	São Roque	Prainha do Norte	38.477785, -28.204158	Intertidal
58	PIX_SR_PrNbc	São Roque	Prainha do Norte|Baia de Canas	38.462872, -28.184805	Intertidal
59	PIX_SR_PrNca	São Roque	Prainha do Norte|Canto da Areia	38.462994, -28.19003	Subtidal
60	PIX_SR_SAbc	São Roque	Santo Amaro|Baía do Canto	38.456384, -28.165936	Intertidal
61	PIX_SR_SAc	São Roque	Santo Amaro|Caisinho	38.456591, -28.16742	Intertidal
62	PIX_SR_SAnt	São Roque	Santo António	38.535259, -28.335402	Intertidal
63	PIX_SR_SAnt	São Roque	Santo António	38.537581, -28.334334	Subtidal
64	PIX_SR_SApm	São Roque	Santo Amaro|Ponta do Mistério	38.45332, -28.120977	Subtidal
65	PIX_SR_SMA	São Roque	São Miguel Arcanjo	38.509128, -28.288709	Subtidal
66	PIX_LP_LPMppb	Lajes do Pico	Lajes do Pico|Maré|Ponta da poça da baleia	38.389725, -28.252395	Intertidal
67	PIX_LP_LPp	Lajes do Pico	Lajes do Pico|Portinho	38.400994, -28.25526	Intertidal
68	PIX_LP_Pm	Lajes do Pico	Piedade|Manhenha	38.410566, -28.036926	Intertidal
69	PIX_LP_SCpi	Lajes do Pico	Santa Cruz|Piscinas	38.404764, -28.187053	Intertidal
70	PIX_MA_MAb	Madalena	Madalena|Barca	38.540254, -28.521195	Intertidal
71	PIX_MA_MOpo	Madalena	Monte|Pocinho	38.494812, -28.540192	Intertidal
72	PIX_SR_CPpov	São Roque	Cais do Pico|Porto Velho	38.527148, -28.319716	Intertidal
73	PIX_SR_PrN	São Roque	Prainha do Norte	38.477785, -28.204158	Intertidal
74	PIX_MA_MAb	Madalena	Madalena|Barca	38.540254, -28.521195	Intertidal

Figure 6.

Sampling locations around Pico Island (by Nuno V. Álvaro).

Sampling description

Intertidal collections were made at low tide by walking over the shores. Subtidal collections were made by scuba diving around the area. Sampling encompassed both physical collections and species presence recordings. For the former, in each sampling location, collections were made manually by scraping one or two specimens of species found into previously labelled bags (Fig. 7). Species recording data were gathered by registering all species present in the sampled locations visited (Fig. 8). Complementary data, for example, shore level (high, mid, low), orientation and type of substrate (bedrock, boulders, cobbles, mixed), habitat (tide pool, open rock, gully, crevice, cave) were also recorded.

Figure 7.

Collecting macroalgae at the rocky intertidal (by the Island Aquatic Ecology Subgroup of cE3c-ABG).

Figure 8.

Subtidal species recording data (by the Island Aquatic Ecology Subgroup of cE3c-ABG).

Quality control

Each sampled taxon was investigated by trained taxonomists with the help of keys and floras. This involved morphological and anatomical examination by eye or under dissecting and compound microscopes of an entire specimen or slide preparation. In difficult cases, specimens were sent to experts for identification.

Step description

In the laboratory, the specimens were sorted and studied following standard procedures used in macroalgae identification.

Species identification was based on morphological and anatomical characters and reproductive structures. For small and simple thalli, this required the observation of the entire thallus by eye and/or under dissecting or compound microscopes. For larger and more complex algae, the investigation of the thallus anatomy required histological work to obtain longitudinal and transverse sections needed for the observation of cells, reproductive structures and other diagnosing characters.

The Azorean algal flora has components from several geographical regions which makes for difficulties in identification. Floras and identification keys to macroalgae in the Atlantic and Western Mediterranean were used in species identification (e.g. Schmidt 1931, Taylor 1967, Taylor 1978, Levring 1974, Dixon and Irvine 1977, Lawson and John 1982, Irvine 1983, Irvine and Chamberlain 1994, Gayral and Cosson 1986, Fletcher 1987, Afonso-Carrillo and Sansón 1989, Burrows 1991, Boudouresque et al. 1992, Cabioc'h et al. 1992, Maggs and Hommersand 1993, Irvine and Chamberlain 1994, Irvine and Chamberlain 1994, Brodie et al. 2007, Lloréns et al. 2012, Rodríguez-Prieto et al. 2013).

For more critical and taxonomically-difficult taxa, specimens were taken to the Natural History Museum (London) for comparison with collections there or sent to appropriate specialists.

A reference collection was made for all collected specimens by assigning them a herbarium code number and depositing them at the AZB Herbarium Ruy Telles Palhinha, University of Azores. Depending on the species and on planned further research, different types of collections were made, namely (i) liquid collections using 5% buffered formaldehyde seawater and then replacing it by the fixing agent Kew (Bridsen and Forman 1999); (ii) dried collections, either by pressing the algae (most species) as described by Gayral and Cosson 1986) or by letting them air dry (calcareous species); (iii) silica collections for molecular studies.

Nomenclatural and taxonomic status used here follow Algaebase (Guiry and Guiry 2020). The database was organised on FileMaker Pro.

Geographic coverage

Description

Pico Island, Azores, Macaronesia, Portugal (approximately 38°34'02″N, 28°33′17″W).

Coordinates

38.376 and 38.567 Latitude; -28.555 and -28.021 Longitude.

Taxonomic coverage

Description

All macroalgae were identified to genus or species. In total, 303 taxa were identified belonging to 30 orders and 67 families, distributed by the phyla Rhodophyta (15 orders and 39 families), Chlorophyta (3 orders and 10 families) and Ochrophyta (12 orders and 18 families).

Taxa included

Rank	Scientific Name	Common Name
phylum	Rhodophyta	Red algae
phylum	Chlorophyta	Green algae
phylum	Ochrophyta	Brown algae

Temporal coverage

Data range: 1989-5-01 – 2018-9-30.

Notes

The sampling was performed on several occasions in the period between 1989 and 2018.

Collection data

Collection name

AZB | Marine macroalgae collection of Pico Island (Azores) – Expedition AZORES/89; AZB | Marine macroalgae collection of Pico Island (Azores) – Expedition PICO/91; AZB | Marine macroalgae collection of Pico Island (Azores) – Project PICOBEL; AZB | Marine macroalgae collection of Pico Island (Azores) – Project LAUMACAT; AZB | Marine macroalgae collection of Pico Island (Azores) – Occasional sampling; Marine macroalgae occurrence in Pico Island (Azores) – Expedition AZORES/89; Marine macroalgae occurrence in Pico Island (Azores) – Project PICOBEL; Marine macroalgae occurrence in Pico Island (Azores) – Project LAUMACAT.

Collection identifier

4ea1e09c-13c8-4b8e-a28a-72c55bde8f66; 0f2368fa-0a53-43c5-9f19-b126260e4e83; 6163248c-236b-4778-99cf-39dbf28a9784; b4ed4e44-3e8f-42d4-a44b-d78585a8f8f0; acc4fc70-0cb6-496e-982c-9207d09b856a; 468e613d-1ce9-4a32-a5f9-c5a8b58545c1; a8405f3e-fdc6-452d-9dc9-ca1fd3abdf2c; 84ff06f5-8c7c-4c3c-9296-38ad24b347bd.

Parent collection identifier

AZB Herbarium Ruy Telles Palhinha, Faculty of Sciences and Technology of the University of the Azores.

Specimen preservation method

Air dry, Dried and pressed; Liquid (Formalin; fixing agent Kew), Silica.

Curatorial unit

AZB Herbarium Ruy Telles Palhinha, Faculty of Sciences and Technology of the University of the Azores.

Usage rights

Use license

Open Data Commons Attribution License

IP rights notes

Creative Commons Attribution (CC-BY) 4.0 License

Data resources

Data package title

Marine algal flora of Pico Island, Azores

Resource link

http://ipt.gbif.pt/ipt/resource?r=pico_seaweed_flora&v=1.11

Alternative identifiers

https://www.gbif.org/dataset/6af010f0-8238-4745-8309-21c3f82bd488

Number of data sets

1

Data set 1.

Data set name

Marine algal (seaweed) flora of Pico Island, Azores

Data format

Darwin Core Archive

Number of columns

51

Download URL

http://ipt.gbif.pt/ipt/resource?r=pico_seaweed_flora

Data format version

v1.11

Description

This data paper presents physical and occurrence data from macroalgal surveys undertaken on Pico Island between 1989 and 2018. The dataset submitted to GBIF is structured as a sample event dataset, with two tables: event (as core) and occurrences (Neto et al. 2020). The data in this sampling event resource have been published as a Darwin Core Archive (DwCA), which is a standardised format for sharing biodiversity data as a set of one or more data tables. The core data table contains 74 records (eventID). The extension data table has 4043 occurrences. An extension record supplies extra information about a core record. The number of records in each extension data table is given in the IPT link. This IPT archives the data and thus serves as the data repository. The data and resource metadata are available for downloading in the downloads section.

Data set 1.

Column label	Column description
Table of Sampling Events	Table with sampling events data (beginning of table)
eventID	Identifier of the event, unique for the dataset
country	Country of the sampling site
countryCode	Code of the country where the event occurred
stateProvince	Name of the region
island	Name of the island
municipality	Name of the municipality
locality	Name of the locality
locationID	Identifier of the location
decimalLatitude	The geographic latitude of the sampling site
decimalLongitude	The geographic longitude of the sampling site
geodeticDatum	The spatial reference system upon which the geographic coordinates are based
coordinateUncertaintyInMetres	The horizontal distance (in metres) from the given decimalLatitude and decimalLongitude describing the smallest circle containing the whole of the Location
eventDate	Time interval when the event occurred
year	The year of the event
samplingProtocol	Sampling method used during an event
locationRemarks	Zonation level
minimumDepthInMetres	The minimum depth in metres where the specimen was found
maximumDepthInMetres	The maximum depth in metres where the specimen was found
eventRemarks	Notes about the event
Table of Species Occurrence	Table with species occurrence data (beginning of new table)
occurrenceID	Identifier of the record, coded as a global unique identifier
institutionID	The identifier for the institution having custody of the object or information referred to in the record
institutionCode	The acronym of the institution having custody of the object or information referred to in the record
collectionID	An identifier of the collection to which the record belongs
collectionCode	The name of the collection from which the record was derived
datasetName	The name identifying the dataset from which the record was derived
eventID	Identifier of the event, unique for the dataset
kingdom	Kingdom name
phylum	Phylum name
class	Class name
order	Order name
family	Family name
genus	Genus name
specificEpithet	The name of the first or species epithet of the scientificName
infraspecificEpithet	The name of the lowest or terminal infraspecific epithet of the scientificName, excluding any rank designation
acceptedNameUsage	The specimen accepted name, with authorship
previousIdentifications	Previous name of the specimen, with authorship
scientificName	The name without authorship applied on the first identification of the specimen
basisOfRecord	The specific nature of the data record
habitat	Description of the habitat where the specimen was found
organismQuantityType	The type of quantification system used to quantity the organisms
organismQuantity	Percentage of the organism coverage
recordedBy	Person(s) responsible for sampling
catalogNumber	Identifying code for a unique sample lot in a biological collection
identifiedBy	Person(s) responsible for taxa identification
type	The nature of the resource
preparations	The preservation method used for the specimen
establishmentMeans	The establishment status of the organism in the study region
occurrenceRemarks	New record status assignment
licence	Reference to the licence under which the record is published

Additional information

This paper accommodates the 4043 specimens of macroalgae recorded from Pico Island in 303 taxa comprising 225 confirmed species and 78 taxa identified only to genus level. The confirmed species (Tables 2, 3) include 142 Rhodophyta, 41 Chlorophyta and 42 Ochrophyta (Phaeophyceae). From these, 110 species are newly-recorded to the island (69 Rhodophyta, 20 Chlorophyta and 21 Ochrophyta), as, for example, Laurencia pyramidalis Bory ex Kützing (Fig. 9). Most species are native, including the three Macaronesian endemisms Botryocladia macaronesica Afonso-Carillo, Sobrino, Tittley & Neto, Laurencia viridis Gil-Rodríguez & Haroun and Codium elisabethiae O. C. Schmidt. Fourteen species represent introductions to the algal flora and 25 have an uncertain status.

Table 2.

Macroalgae species from Pico Island, with information on number of records, biogeographic origin and occurrence remarks (A: abundant; C: common; R: rare).

Phylum	Species (Accepted Name)	Number of records	Establishment Means	Occurrence Remarks
Rhodophyta	Acrosorium ciliolatum (Harvey) Kylin	34	Native	New record	C
Rhodophyta	Aglaothamnion cordatum (Børgesen) Feldmann-Mazoyer	1	Introduced		R
Rhodophyta	Aglaothamnion tenuissimum (Bonnemaison) Feldmann-Mazoyer	2	Uncertain		R
Rhodophyta	Ahnfeltiopsis devoniensis (Greville) P.C.Silva & DeCew	5	Native	New record	R
Rhodophyta	Amphiroa beauvoisii J.V.Lamouroux	11	Native		C
Rhodophyta	Amphiroa fragilissima (Linnaeus) J.V.Lamouroux	2	Native	New record	R
Rhodophyta	Amphiroa rigida J.V.Lamouroux	4	Native	New record	R
Rhodophyta	Anotrichium barbatum (C.Agardh) Nägeli	1	Native	New record	R
Rhodophyta	Anotrichium furcellatum (J.Agardh) Baldock	1	Uncertain		R
Rhodophyta	Antithamnion decipiens (J.Agardh) Athanasiadis	4	Native	New record	R
Rhodophyta	Antithamnion diminuatum Wollaston	2	Introduced		R
Rhodophyta	Antithamnionella boergesenii (Cormaci & G.Furnari) Athanasiadis	2	Uncertain		R
Rhodophyta	Aphanocladia stichidiosa (Funk) Ardré	4	Native		R
Rhodophyta	Asparagopsis armata Harvey, phase Falkenbergia rufolanosa (Harvey) F.Schmitz	42	Introduced	New record	A
Rhodophyta	Asparagopsis armata Harvey	142	Introduced		C
Rhodophyta	Asparagopsis taxiformis (Delile) Trevisan	35	Native		C
Rhodophyta	Asteromenia peltata (W.R.Taylor) Huisman & A.J.K.Millar	16	Native	New record	C
Rhodophyta	Bornetia secundiflora (J.Agardh) Thuret	3	Native	New record	R
Rhodophyta	Botryocladia botryoides (Wulfen) Feldmann	3	Native	New record	R
Rhodophyta	Botryocladia macaronesica Afonso-Carillo, Sobrino, Tittley & Neto	1	Macaronesian endemism	New record	R
Rhodophyta	Callithamnion corymbosum (Smith) Lyngbye	5	Native	New record	R
Rhodophyta	Callithamnion granulatum (Ducluzeau) C.Agardh	1	Native	New record	R
Rhodophyta	Callithamnion tetragonum (Withering) S.F.Gray	4	Native		R
Rhodophyta	Carradoriella denudata (Dillwyn) A.M.Savoie & G.W.Saunders	20	Uncertain		C
Rhodophyta	Carradoriella elongata (Hudson) A.M.Savoie & G.W.Saunders	9	Native	New record	R
Rhodophyta	Catenella caespitosa (Withering) L.M.Irvine in Parke & P.S.Dixon	1	Native	New record	R
Rhodophyta	Caulacanthus ustulatus (Mertens ex Turner) Kützing	10	Uncertain		C
Rhodophyta	Centroceras clavulatum (C.Agardh) Montagne	57	Native		A
Rhodophyta	Ceramium ciliatum (J.Ellis) Ducluzeau	18	Native		C
Rhodophyta	Ceramium cingulatum Weber Bosse	1	Introduced		R
Rhodophyta	Ceramium circinatum (Kützing) J.Agardh	1	Native	New record	R
Rhodophyta	Ceramium codii (H.Richards) Mazoyer	2	Native		R
Rhodophyta	Ceramium diaphanum (Lightfoot) Roth	21	Native		C
Rhodophyta	Ceramium echionotum J.Agardh	3	Native		R
Rhodophyta	Ceramium gaditanum (Clemente) Cremades	4	Uncertain		R
Rhodophyta	Ceramium virgatum Roth	42	Native		C
Rhodophyta	Champia parvula (C.Agardh) Harvey	3	Native		R
Rhodophyta	Chondracanthus acicularis (Roth) Fredericq	58	Native		A
Rhodophyta	Chondracanthus teedei (Mertens ex Roth) Kützing	26	Native	New record	C
Rhodophyta	Chondria capillaris (Hudson) M.J.Wynne	15	Native	New record	C
Rhodophyta	Chondria coerulescens (J.Agardh) Sauvageau	1	Uncertain		R
Rhodophyta	Chondria dasyphylla (Woodward) C.Agardh	13	Uncertain		C
Rhodophyta	Coelothrix irregularis (Harvey) Børgesen	1	Native		R
Rhodophyta	Corallina officinalis Linnaeus	5	Native		R
Rhodophyta	Cottoniella filamentosa (M.Howe) Børgesen	5	Native	New record	R
Rhodophyta	Crouania attenuata (C.Agardh) J.Agardh	11	Native		C
Rhodophyta	Cryptopleura ramosa (Hudson) L.Newton	6	Native		R
Rhodophyta	Dasya corymbifera J.Agardh	7	Native		R
Rhodophyta	Dasya rigidula (Kützing) Ardissone	2	Native	New record	R
Rhodophyta	Dermocorynus dichotomus (J.Agardh) Gargiulo, M.Morabito & Manghisi	63	Native		A
Rhodophyta	Diplothamnion jolyi C.Hoek	3	Native	New record	R
Rhodophyta	Dudresnaya verticillata (Withering) Le Jolis	1	Native	New record	R
Rhodophyta	Ellisolandia elongata (J.Ellis & Solander) K.R.Hind & G.W.Saunders	190	Native		A
Rhodophyta	Erythrocystis montagnei (Derbès & Solier) P.C.Silva	11	Native	New record	C
Rhodophyta	Gaillona hookeri (Dillwyn) Athanasiadis	5	Native		R
Rhodophyta	Gastroclonium ovatum (Hudson) Papenfuss	2	Native	New record	R
Rhodophyta	Gastroclonium reflexum (Chauvin) Kützing	20	Native		C
Rhodophyta	Gayliella flaccida (Harvey ex Kützing) T.O.Cho & L.J.McIvor	4	Native		R
Rhodophyta	Gelidium arbuscula Bory ex Børgesen	4	Native	New record	R
Rhodophyta	Gelidium microdon Kützing	81	Native		A
Rhodophyta	Gelidium pusillum (Stackhouse) Le Jolis	76	Native	New record	A
Rhodophyta	Gelidium spinosum (S.G.Gmelin) P.C.Silva	35	Native		C
Rhodophyta	Gigartina pistillata (S.G.Gmelin) Stackhouse	2	Native	New record	R
Rhodophyta	Gracilariopsis longissima (S.G.Gmelin) Steentoft, L.M.Irvine & Farnham	1	Native	New record	R
Rhodophyta	Grateloupia filicina (J.V.Lamouroux) C.Agardh	3	Native	New record	R
Rhodophyta	Gymnogongrus crenulatus (Turner) J.Agardh	38	Native	New record	C
Rhodophyta	Gymnogongrus griffithsiae (Turner) C.Martius	37	Native	New record	C
Rhodophyta	Gymnothamnion elegans (Schousboe ex C.Agardh) J.Agardh	2	Native	New record	R
Rhodophyta	Halarachnion ligulatum (Woodward) Kützing	2	Native	New record	R
Rhodophyta	Herposiphonia secunda (C.Agardh) Ambronn	2	Native		R
Rhodophyta	Heterosiphonia crispella (C.Agardh) M.J.Wynne	5	Native	New record	R
Rhodophyta	Hildenbrandia crouaniorum J.Agardh	2	Native	New record	R
Rhodophyta	Hypnea arbuscula P.J.L.Dangeard	1	Native		R
Rhodophyta	Hypnea cervicornis J.Agardh	2	Native		R
Rhodophyta	Hypnea flagelliformis Greville ex J.Agardh	8	Introduced		R
Rhodophyta	Hypnea musciformis (Wulfen) J.V.Lamouroux	97	Uncertain		A
Rhodophyta	Hypnea spinella (C.Agardh) Kützing	25	Native	New record	C
Rhodophyta	Hypoglossum hypoglossoides (Stackhouse) Collins & Hervey	2	Native	New record	R
Rhodophyta	Jania capillacea Harvey	16	Native	New record	C
Rhodophyta	Jania longifurca Zanardini	9	Uncertain		R
Rhodophyta	Jania pedunculata var. adhaerens (J.V.Lamouroux) A.S.Harvey, Woelkerling & Reviers	8	Native	New record	R
Rhodophyta	Jania pumila J.V.Lamouroux	10	Native	New record	C
Rhodophyta	Jania rubens (Linnaeus) J.V.Lamouroux	43	Native		C
Rhodophyta	Jania virgata (Zanardini) Montagne	13	Uncertain		C
Rhodophyta	Kallymenia reniformis (Turner) J.Agardh	1	Native	New record	R
Rhodophyta	Laurencia brongniartii J.Agardh	3	Introduced		R
Rhodophyta	Laurencia chondrioides Børgesen	11	Introduced		C
Rhodophyta	Laurencia dendroidea J.Agardh	10	Introduced		C
Rhodophyta	Laurencia intricata J.V.Lamouroux	2	Native	New record	R
Rhodophyta	Laurencia microcladia Kützing	3	Native	New record	R
Rhodophyta	Laurencia minuta Vandermeulen, Garbary & Guiry	18	Introduced	New record	C
Rhodophyta	Laurencia obtusa (Hudson) J.V.Lamouroux	2	Native		R
Rhodophyta	Laurencia pyramidalis Bory ex Kützing	11	Native	New record	C
Rhodophyta	Laurencia tenera C.K.Tseng	17	Native	New record	C
Rhodophyta	Laurencia viridis Gil-Rodríguez & Haroun	4	Macaronesian endemism	New record	R
Rhodophyta	Laurenciella marilzae (Gil-Rodríguez, Sentíes, Díaz-Larrea, Cassano & M.T.Fujii) Gil-Rodríguez, Sentíes, Díaz-Larrea, Cassano & M.T.Fujii	2	Native	New record	R
Rhodophyta	Lejolisia mediterranea Bornet	1	Native	New record	R
Rhodophyta	Leptosiphonia brodiei (Dillwyn) A.M.Savoie & G.W.Saunders	2	Uncertain		R
Rhodophyta	Liagora viscida (Forsskål) C.Agardh	8	Native	New record	R
Rhodophyta	Lithophyllum incrustans Philippi	1	Native		R
Rhodophyta	Lomentaria articulata (Hudson) Lyngbye	75	Native	New record	A
Rhodophyta	Lomentaria clavellosa (Lightfoot ex Turner) Gaillon	1	Uncertain		R
Rhodophyta	Lophosiphonia cristata Falkenberg	13	Native		C
Rhodophyta	Meredithia microphylla (J.Agardh) J.Agardh	10	Native	New record	C
Rhodophyta	Nemalion elminthoides (Velley) Batters	21	Native		C
Rhodophyta	Nitophyllum punctatum (Stackhouse) Greville	11	Native	New record	C
Rhodophyta	Osmundea hybrida (A.P.de Candolle) K.W.Nam	5	Native	New record	R
Rhodophyta	Osmundea oederi (Gunnerus) G.Furnari	3	Native		R
Rhodophyta	Osmundea pinnatifida (Hudson) Stackhouse	23	Native		C
Rhodophyta	Osmundea truncata (Kützing) K.W.Nam & Maggs	24	Native	New record	C
Rhodophyta	Peyssonnelia squamaria (S.G.Gmelin) Decaisne ex J.Agardh	8	Native		R
Rhodophyta	Phyllophora gelidioides P.Crouan & H.Crouan ex Karsakoff	1	Native	New record	R
Rhodophyta	Phymatolithon calcareum (Pallas) W.H.Adey & D.L.McKibbin ex Woelkering & L.M.Irvine	1	Native		R
Rhodophyta	Platoma cyclocolpum (Montagne) F.Schmitz	9	Native		R
Rhodophyta	Plocamium cartilagineum (Linnaeus) P.S.Dixon	28	Native		C
Rhodophyta	Polysiphonia atlantica Kapraun & J.N.Norris	3	Native	New record	R
Rhodophyta	Polysiphonia ceramiiformis P.Crouan & H.Crouan	1	Native	New record	R
Rhodophyta	Polysiphonia havanensis Montagne	3	Native	New record	R
Rhodophyta	Polysiphonia opaca (C.Agardh) Moris & De Notaris	3	Native		R
Rhodophyta	Polysiphonia stricta (Mertens ex Dillwyn) Greville	6	Native		R
Rhodophyta	Porphyra umbilicalis Kützing	1	Native	New record	R
Rhodophyta	Pterocladiella capillacea (S.G.Gmelin) Santelices & Hommersand	131	Native		A
Rhodophyta	Rhodymenia holmesii Ardissone	22	Native	New record	C
Rhodophyta	Rhodymenia pseudopalmata (J.V.Lamouroux) P.C.Silva	9	Native	New record	R
Rhodophyta	Schizymenia apoda (J.Agardh) J.Agardh	1	Native		R
Rhodophyta	Schottera nicaeensis (J.V.Lamouroux ex Duby) Guiry & Hollenberg	1	Uncertain		R
Rhodophyta	Scinaia interrupta (A.P.de Candolle) M.J.Wynne	2	Native		R
Rhodophyta	Sebdenia dichotoma Berthold	7	Native		R
Rhodophyta	Sebdenia rodrigueziana (Feldmann) Codomier ex Parkinson	6	Native		R
Rhodophyta	Spermothamnion repens (Dillwyn) Magnus	1	Native	New record	R
Rhodophyta	Sphaerococcus coronopifolius Stackhouse	16	Native	New record	C
Rhodophyta	Spongoclonium caribaeum (Børgesen) M.J.Wynne	4	Introduced		R
Rhodophyta	Spyridia filamentosa (Wulfen) Harvey	2	Native	New record	R
Rhodophyta	Symphyocladia marchantioides (Harvey) Falkenberg	44	Introduced		C
Rhodophyta	Taenioma nanum (Kützing) Papenfuss	3	Native		R
Rhodophyta	Tenarea tortuosa (Esper) Me.Lemoine	1	Native		R
Rhodophyta	Vertebrata fruticulosa (Wulfen) Kuntze	4	Native	New record	R
Rhodophyta	Vertebrata fucoides (Hudson) Kuntze	1	Uncertain	New record	R
Rhodophyta	Vertebrata furcellata (C.Agardh) Kuntze	1	Native		R
Rhodophyta	Vertebrata reptabunda (Suhr) Díaz-Tapia & Maggs	10	Uncertain		C
Rhodophyta	Vertebrata tripinnata (Harvey) Kuntze	1	Native		R
Rhodophyta	Wrangelia penicillata (C.Agardh) C.Agardh	3	Native	New record	R
Rhodophyta	Yuzurua poiteaui (J.V.Lamouroux) Martin-Lescanne	4	Native	New record	R
Chlorophyta	Anadyomene saldanhae A.B.Joly & E.C.Oliveira	94	Native	New record	A
Chlorophyta	Anadyomene stellata (Wulfen) C.Agardh	16	Uncertain		C
Chlorophyta	Blidingia minima (Nägeli ex Kützing) Kylin	4	Native		R
Chlorophyta	Bryopsis cupressina J.V.Lamouroux	4	Native	New record	R
Chlorophyta	Bryopsis pennata J.V.Lamouroux	1	Native	New record	R
Chlorophyta	Bryopsis plumosa (Hudson) C.Agardh	6	Native	New record	R
Chlorophyta	Chaetomorpha aerea (Dillwyn) Kützing	8	Native	New record	R
Chlorophyta	Chaetomorpha ligustica (Kützing) Kützing	1	Native	New record	R
Chlorophyta	Chaetomorpha linum (O.F.Müller) Kützing	4	Native		R
Chlorophyta	Chaetomorpha pachynema (Montagne) Kützing	84	Native		A
Chlorophyta	Cladophora albida (Nees) Kutzing	6	Native	New record	R
Chlorophyta	Cladophora coelothrix Kützing	32	Native	New record	C
Chlorophyta	Cladophora conferta P.Crouan & H.Crouan	4	Native		R
Chlorophyta	Cladophora hutchinsiae (Dillwyn) Kützing	2	Native	New record	R
Chlorophyta	Cladophora laetevirens (Dillwyn) Kützing	7	Uncertain		R
Chlorophyta	Cladophora lehmanniana (Lindenberg) Kützing	8	Native	New record	R
Chlorophyta	Cladophora liebetruthii Grunow	2	Native	New record	R
Chlorophyta	Cladophora prolifera (Roth) Kützing	43	Native		C
Chlorophyta	Cladophoropsis macromeres W.R.Taylor	2	Native	New record	R
Chlorophyta	Cladophoropsis membranacea (Hofman Bang ex C.Agardh) Børgesen	6	Uncertain		R
Chlorophyta	Codium adhaerens C.Agardh	101	Native		A
Chlorophyta	Codium decorticatum (Woodward) M.Howe	16	Native		C
Chlorophyta	Codium effusum (Rafinesque) Delle Chiaje	22	Uncertain		C
Chlorophyta	Codium elisabethiae O.C.Schmidt	39	Macaronesian endemism		C
Chlorophyta	Codium fragile subsp. fragile (Suringar) Hariot	4	Introduced	New record	R
Chlorophyta	Codium taylorii P.C.Silva	3	Native		R
Chlorophyta	Codium vermilara (Olivi) Delle Chiaje	18	Native	New record	C
Chlorophyta	Ernodesmis verticillata (Kützing) Børgesen	2	Native	New record	R
Chlorophyta	Lychaete pellucida (Hudson) M.J.Wynne	10	Native	New record	C
Chlorophyta	Microdictyon umbilicatum (Velley) Zanardini	11	Native	New record	C
Chlorophyta	Pseudorhizoclonium africanum (Kützing) Boedeker	1	Native	New record	R
Chlorophyta	Ulva clathrata (Roth) C.Agardh	14	Native		C
Chlorophyta	Ulva compressa Linnaeus	13	Native		C
Chlorophyta	Ulva intestinalis Linnaeus	13	Native		C
Chlorophyta	Ulva lactuca Linnaeus	1	Uncertain		R
Chlorophyta	Ulva linza Linnaeus	3	Native		R
Chlorophyta	Ulva polyclada Kraft	5	Native		R
Chlorophyta	Ulva prolifera O.F.Müller	3	Native		R
Chlorophyta	Ulva rigida C.Agardh	133	Native		A
Chlorophyta	Valonia macrophysa Kützing	1	Native	New record	R
Chlorophyta	Valonia utricularis (Roth) C.Agardh	7	Native	New record	R
Ochrophyta	Ascophyllum nodosum (Linnaeus) Le Jolis	4	Native		R
Ochrophyta	Bachelotia antillarum (Grunow) Gerloff	4	Native		R
Ochrophyta	Canistrocarpus cervicornis (Kützing) De Paula & De Clerck	1	Native	New record	R
Ochrophyta	Carpomitra costata (Stackhouse) Batters	4	Native	New record	R
Ochrophyta	Cladostephus spongiosum (Hudson) C.Agardh	6	Native	New record	R
Ochrophyta	Colpomenia sinuosa (Mertens ex Roth) Derbès & Solier	98	Native		A
Ochrophyta	Cutleria multifida (Turner) Greville	9	Uncertain		R
Ochrophyta	Cutleria multifida (Turner) Greville, phase Aglaozonia parvula (Greville) Zanardini	10	Uncertain	New record	C
Ochrophyta	Cystoseira compressa (Esper) Gerloff & Nizamuddin	23	Native	New record	C
Ochrophyta	Cystoseira foeniculacea (Linnaeus) Greville	2	Native	New record	R
Ochrophyta	Cystoseira humilis Schousboe ex Kützing	5	Native		R
Ochrophyta	Dictyopteris polypodioides (A.P.de Candolle) J.V.Lamouroux	1	Native	New record	R
Ochrophyta	Dictyota bartayresiana J.V.Lamouroux	3	Native	New record	R
Ochrophyta	Dictyota cyanoloma Tronholm, De Clerck, A.Gómez-Garreta & Rull Lluch	3	Native		R
Ochrophyta	Dictyota dichotoma (Hudson) J.V.Lamouroux	35	Native		C
Ochrophyta	Dictyota dichotoma var. intricata (C.Agardh) Greville	7	Native	New record	R
Ochrophyta	Dictyota implexa (Desfontaines) J.V.Lamouroux	6	Native	New record	R
Ochrophyta	Ectocarpus fasciculatus Harvey	2	Native		R
Ochrophyta	Fucus spiralis Linnaeus	32	Uncertain		C
Ochrophyta	Halopteris filicina (Grateloup) Kützing	77	Native		A
Ochrophyta	Halopteris scoparia (Linnaeus) Sauvageau	129	Native		A
Ochrophyta	Hincksia ovata (Kjellman) P.C.Silva	1	Native		R
Ochrophyta	Hydroclathrus clathratus (C.Agardh) M.Howe	2	Native	New record	R
Ochrophyta	Hydroclathrus tilesii (Endlicher) Santiañez & Wynne	15	Introduced	New record	C
Ochrophyta	Leathesia marina (Lyngbye) Decaisne	2	Uncertain	New record	R
Ochrophyta	Lobophora variegata (J.V.Lamouroux) Womersley ex E.C.Oliveira	2	Native		R
Ochrophyta	Microzonia floridana (E.C.Henry) Camacho & Fredericq	3	Native		R
Ochrophyta	Myrionema strangulans Greville	2	Native	New record	R
Ochrophyta	Nemoderma tingitanum Schousboe ex Bornet	39	Native	New record	C
Ochrophyta	Padina pavonica (Linnaeus) Thivy	91	Native		A
Ochrophyta	Petalonia binghamiae (J.Agardh) K.L.Vinogradova	10	Introduced		C
Ochrophyta	Petrospongium berkeleyi (Greville) Nägeli ex Kützing	1	Native	New record	R
Ochrophyta	Sargassum cymosum C.Agardh	5	Native		R
Ochrophyta	Sargassum desfontainesii (Turner) C.Agardh	2	Native	New record	R
Ochrophyta	Sargassum furcatum Kützing	25	Native	New record	C
Ochrophyta	Sargassum vulgare C.Agardh	1	Native		R
Ochrophyta	Scytosiphon lomentaria (Lyngbye) Link	1	Native	New record	R
Ochrophyta	Sphacelaria cirrosa (Roth) C.Agardh	2	Native		R
Ochrophyta	Sphacelaria tribuloides Meneghini	1	Uncertain		R
Ochrophyta	Spongonema tomentosum (Hudson) Kützing	1	Native	New record	R
Ochrophyta	Taonia atomaria (Woodward) J.Agardh	2	Native	New record	R
Ochrophyta	Treptacantha abies-marina (S.G.Gmelin) Kützing	72	Native	New record	A
Ochrophyta	Zonaria tournefortii (J.V.Lamouroux) Montagne	90	Native		A

Table 3.

Main taxonomic figures with information on the species origin and status.

Phyllum	Order	Family	Specimens Number	Total taxa	Total species	Native	Introduced	Uncertain	Macaronesian endemism	New record
Rhodophyta	15	39	2404	197	142	113	11	16	2	69
Chlorophyta	3	10	773	53	41	34	1	5	1	20
Ochrophyta	12	18	866	53	42	36	2	4		21
Total	30	67	4043	303	225	183	14	25	3	110

Figure 9.

Laurencia pyramidalis, a new record for Pico Island (by the Island Aquatic Ecology Subgroup of cE3c-ABG).

Many species were only sporadically recorded on Pico, but 11 were commonly found around the Island and occurred quite abundantly in some locations: the Rhodophyta Asparagopsis armata Harvey, Ellisolandia elongata (J. Ellis & Solander) K. R. Hind & G. W. Saunders, Hypnea musciformis (Wulfen) J. V. Lamouroux and Pterocladiella capillacea (S. G. Gmelin) Santelices & Hommersand; the Chlorophyta Anadyomene saldanhae A. B. Joly & E. C. Oliveira, Codium adhaerens C. Agradh and Ulva rigida C. Agardh; the Ochrophyta Colpomenia sinuosa (Mertens ex Roth) Derbès & Solier in Castagne, Halopteris scoparia (Linnaeus) Sauvageau, Padina pavonica (Linnaeus) Thivy and Zonaria tournefortii (J. V. Lamouroux) Montagne.

A mismatch regarding the GBIF backbone taxonomy of some of the macroalgae species names was identified as detailed in Suppl. material 1.

Supplementary Material

Supplementary material 1

DP-PIX-id_14106_normalized-redz.csv

Ana I. Neto

Data type

Macroalgae taxonomic mismatching

Brief description

GBIF does not have the more actualised nomenclature for some of the macroalgae species names. Therefore, the matching tools of its platform were applied to the species list, as required by Pensoft's data auditor, to identify the problematic taxonomic situations. The resulting file (DP-PIX-id_14106_normalized-redz.csv) is included here, since the names will not be immediately updated in the GBIF Taxonomic Backbone. A request was already sent to GBIF helpdesk to resolve this situation.

File: oo_438159.csv

Funding Statement

This work is financed by the ERDF in 85% and by regional funds in 15%, through the Operational Program Azores 2020, within the scope of the project “ACORES-01-0145-FEDER-000072”.

Author contributions

AIN: Conceptualisation; Methodology; Investigation (fieldwork and laboratory work); Resources; Data Curation; Formal analysis and interpretation; Paper writing

ACLP: Investigation (laboratory work); Resources; Paper writing

NVA: Investigation (field and laboratory work); Maps elaboration; Paper writing

RR: Resources; Data Curation

RMAN: Data Curation; Formal analysis and interpretation; Paper writing

IT: Methodology; Investigation (field and laboratory work); Data Curation; Paper writing

IM: Data Curation; Formal analysis and interpretation; Paper writing