(Table 1) Presence of sublittoral macroalgae in the investigated profiles in Potter Cove, King George Island, Antarctica, supplement to: Klöser, Heinz; Quartino, Maria Liliana; Wiencke, Christian (1996): Distribution of macroalgae and macroalgal communities in gradients of physical conditions in Potter Cove, King George Island, Antarctica. Hydrobiologia, 333(1), 1-17

• Main Authors: Klöser, Heinz, Quartino, Maria Liliana, Wiencke, Christian
• Format: Dataset
• Language: English
• Published: PANGAEA - Data Publisher for Earth & Environmental Science 1996
• Subjects: DEPTH, water; Depth, top/min; Depth, bottom/max; Sample code/label; Antarctosaccion applanatum; Parlibellus delognei; Parlibellus schefterae; Lambia antarctica; Monostroma hariotii; Adenocystis utricularis; Ascoseira mirabilis; Cystosphaera jacquinotii; Desmarestia anceps; Desmarestia antarctica; Desmarestia menziesii; Elachista antarctica; Geminocarpus geminatus; Halopteris obovata; Himantothallus grandifolius; Phaeurus antarcticus; Antarcticothamnion polysporum; Ballia callitricha; Callophyllis sp.; Curdiea racovitzae; Delesseria lancifolia; Delesseria salicifolia; Georgiella confluens; Gigartina skottsbergii; Gymnogongrus antarcticus; Hymenocladiopsis prolifera; Iridaea cordata; Trematocarpus antarcticus; Myriogramme manginii; Myriogramme smithii; Palmaria decipiens; Pantoneura plocamioides; Phycodrys antarctica; Phycodrys austrogeorgica; Phycodrys quercifolia; Gymnogongrus turquetii; Picconiella plumosa; Plocamium cartilagineum; Porphyra plocamiestris; Rhodymenia coccocarpa; Sarcodia montagneana; Multiple investigations; Counting from image; Jubany_Dallmann; Carlini/Jubany Station; King George Island; Potter Cove; Wiencke; Antarc*; Antarctica; antarcticus
• Online Access: https://dx.doi.org/10.1594/pangaea.741015; https://doi.pangaea.de/10.1594/PANGAEA.741015

The vegetation of a small fjord and its adjacent open shore was documented by subaquatic video. The distribution of individual species of macroalgae and the composition of assemblages were compared with gradients of light availability, hydrography, slope inclination, substratum, and exposition to turbulence and ice. The sublittoral fringe is usually abraded by winterly ice floes and devoid of large, perennial algae. Below this zone, the upper sublittoral is dominated by Desmarestia menziesii on steep rock faces, where water movements become irregular, or by Ascoseira mirabilis and Palmaria decipiens on weakly inclined slopes with steady rolling water movements. In the central sublittoral above 15 m, where turbulence is still active, Desmarestia anceps is outcompeting all other species on solid substratum, However, the species is not able to persist on loose material under these conditions. Instead, Himantothallus grandifolius may occur. Deeper, where turbulence usually is negligible, Desmarestia anceps also covers loose material. The change of dominance to Himantothallus grandifolius in the deep sublittoral cannot completely be explained at present. Himantothallus grandifolius also prevails in a mixed assemblage under the influence of grounding icebergs. Most of the smaller algae are opportunists with different degrees of tolerance for turbulence, but some apparently need more stable microhabitats and thus are dependent from continuing suppression of competitive large phaeophytes. : X = present. - = absentSCUBA surveys, using Sony High 8 Camcorder CCD-V800E in a MPK-VX1 housing, camera held vertically at a distance of 1 m above the bottom. Profiles 8 and 11 were devoid of macroalgae. Macroalgae in Profile 9 and 10 were restricted to some dropstones near the shore. Profiles 1 and 2 as well as 4 and 5 were lumped because of their proximity.