Table 1.
Hydrographic parameters, mesozooplankton biomass in dry weight (mg DW/mg WW), and percentage (%, in brackets) including all development stages of main taxonomic groups and dominant species in total biomass from three water bodies at the Eastern Gotland Basin in July 2014 and 2015
| Surface water | Winter water | Bottom water | ||||
|---|---|---|---|---|---|---|
| 2014 | 2015 | 2014 | 2015 | 2014 | 2015 | |
| Depth | 0−10 m | 0−25 m | 10−60 m | 25−65 m | 60−125 m | 65−110 m |
| Temperature (°C) | 17.9–19.8 | 8.0–16.2 | 3.5–17.9 | 4.4–8.0 | 3.5–5.6 | 7.4–11.4 |
| Salinity | 6.6–6.8 | 6.8–7.2 | 6.6–7.5 | 7.5–8.4 | 4.5–6.3 | 8.4–11.7 |
| Copepods | 26,598 (34) | 62,119 (86) | 83,558 (94) | 91,989 (99) | 12,147 (97) | 1,154 (99) |
| Temora longicornis | 2,202 (3) | 42,864 (59) | 62,110 (70) | 68,875 (74) | 206 (2) | 1,038 (9) |
| Acartia spp. | 20,861 (26) | 4,596 (6) | 4,541 (5) | 3,078 (3) | 56 (<1) | 62 (1) |
| Centropages spp. | 372 (<1) | 12,753 (18) | 3,711(4) | 13,488 (14) | 30 (<1) | 236 (2) |
| Pseudo/Paracalanus spp.a | 761 (<1) | 280 (0) | 5,964(7) | 6,458 (7) | 11,744 (94) | 10,187 (88) |
| Cladocera | 43,743 (56) | 4,636 (6) | 3,782 (4) | 715 (1) | 62 (<1) | |
| Bosmina spp. | 30,440 (39) | 116 (<1) | 219 ( <1) | – | 26 (<1) | |
| Evadne nordmani | 251 (<1) | 1792 (2) | 3,249 (4) | 560 (<1) | 17(<1) | |
| Pleopsis polyphemoides | 9,165 (12) | 1984 (3) | 313 (0) | 155 (<1) | 19 (<1) | |
| Podon intermedius | 3,610 (5) | 744 (1) | – | – | – | – |
| Rotifera | 8,380 (11) | 5,407 (7) | 1,324 (1) | 379 (<1) | 45 (<1) | 6 (<1) |
| Synchaeta | 8,026 (10) | 5,379 (7) | 1,321 (1) | 379 (<1) | 45 (<1) | 6 (<1) |
| Keratella | 355 (<1) | 28 (<1) | 2 (<1) | – | – | – |
Bold values indicate most abundant taxa and species during the sampling period.
Total biomass includes the taxonomic groups of balanus, polychaeta, bivalvia, gastropoda, copelata.
a
can include individuals of Paracalanus spp. due to uncertainties in the identification of younger stages of this genus.