Table 1.
Information on sampling localities and periods, population codes and number of Sargassum horneri samples analysed in this study.
| Sampling locality | Population code | Population type | Sample state | Latitude | Longitude | Sampling period | N COX | N MSAT |
|---|---|---|---|---|---|---|---|---|
| HJ (Hyeopjae) | KF15 | Floating | Stranded on shorelines | 33°23′38.88″N | 126°14′23.02″E | Feb 2015 | 30 | 30 |
| JJP (Jeju Port) | KF16-1 | Floating | Stranded on shorelines | 33°31′15.08″N | 126°32′11.98″E | Mar 2016 | 10 | 10 |
| SGP (Seogwipo) | KF16-2 | Floating | Floating in seawater | 33°13′48.40″N | 126°34′1.09″E | 15 | 30 | |
| SS (Sasu Port) | KF17 | Floating | Stranded on shorelines | 33°30′35.25″N | 126°28′47.04″E | Feb 2017 | 10 | 30 |
| ECS1 (East China Sea 1) | CF17 | Floating | Floating in seawater |
32°29′95″N 32°29″89″N 32°00′01″N 31°59′99″N 31°30′04″N 31°29′93″N |
124°12′98″E 127°120′91′E 124°13′05″E 126°30′08″E 124°13′00″E 127°05′94″E |
10 | 30 | |
| ECS2 (East China Sea 2) | CF17a | Floating | Floating in seawater | Apr–May 2017 | 10 | 30 | ||
| HN (Haenam)-1 | KF17a-1 | Floating | Stranded on Porphyra cultivation rafts |
34°21′52.6″N 34°21′52.6″N 34°22′03.5″N 34°22′03.5″N |
126°27′42.4″E 126°28′10.3″E 126°28′10.3″E 126°27′42.4″E |
7 | 7 | |
| HN-2 | KF17a-2 | Floating | Stranded on Porphyra cultivation rafts |
34°19′13.2″N 34°19′40.9″N 34°19′40.9″N 34°19′25.9″N 34°19′25.9″N 34°19′13.4″N |
126°30′39.6″E 126°30′39.9″E 126°29′48.0″E 126°29′48.0″E 126°30′25.4″E 126°30′25.4″E |
11 | 13 | |
| HN-3 | KF17a-3 | Floating | Stranded on Porphyra cultivation rafts |
34°20′16.3″N 34°20′16.3″N 34°20′02.3″N 34°20′02.3″N |
126°29′29.9″E 126°30′11.5″E 126°30′11.5″E 126°29′29.9″E |
10 | 24 | |
| HN-4 | KF17a-4 | Floating | Stranded on Porphyra cultivation rafts |
34°18′00.9″N 34°18′00.9″N 34°17′52.2″N 34°17′52.2″N |
126°32′03.1″E 126°32′07.6″E 126°32′07.6″E 126°32′03.1″E |
10 | 28 | |
| SSL (South Sea; Line) | KF17a-5 | Floating | Floating in seawater | 33°00′00.0″N | 127°24′00.0″E | 6 | 6 | |
| JJSW (Jeju Southwest) | KF17a-6 | Floating | Floating in seawater | 33°01′27.7″N | 125°44′49.0″E | 8 | 30 | |
| SA (Sinan) | KF17b-1 | Floating | Stranded on Porphyra cultivation rafts | 34°48′21.7″N | 125°59′06.3″E | Dec 2017–Jan 2018 | 5 | 5 |
| WS (West Sea; Line) | KF17b-2 | Floating | Floating in seawater |
34°43′00.1″N 34°05′30.1″N 34°05′30.1″N |
124°35′48.1″E 125°00′00.0″E 124°48′00.0″E |
25 | 26 | |
| DBP (Daebyeon Port) | K1 | Benthic | — | 35°13′3″N | 129°13′45″E | May 2016 | 3 | 3 |
| DSP (Deoksan Port) | K2 | Benthic | — | 37°22′38″N | 129°15′17″E | May 2016 | 26 | 25 |
| YDA (Youngduam) | K3 | Benthic | — | 33°30′59.06″N | 126°30′32.43″E | May 2016 | 5 | 30 |
| MS (Munseom) | K4 | Benthic | — | 33°13′38″N | 126°34′04″E | Mar 2016 | 15 | 29 |
| YS (Yeosu) | K5 | Benthic | — | 34°45′00.07″N | 127°39′20.46″E | Nov 2015 | 14 | 30 |
| Total | 230 | 416 |
“Floating” samples were collected from drifting in the seawaters, stranded on Porphyra cultivation rafts or stranded on shorelines, whereas “benthic” samples were obtained from intact S. horneri individuals attached to benthic substrata by scuba-diving (see Fig. 1). NCOX: number of individuals sequenced for mtDNA cox3, NMSAT: average sample sizes across seven microsatellites genotyped.