TY  - JOUR
AU  - Julien Thébault, Hana Uvanović
PY  - 2023//
TI  - Influence of sea-ice dynamics on coastal Antarctic benthos: A case study on lantern clams (Laternula elliptica) in Adélie Land
KW  - Benthic-pelagic coupling Clams East Antarctica Food source Growth Ice Master chronology Sclerochronology Sympagic algae
N2  - Polar regions are warming faster than the world average and are profoundly affected by changes in the spatio-temporal dynamics of sea ice, with largely unknown repercussions on the functioning of marine ecosystems. Here, we investigated the impacts of interannual sea-ice variability on coastal benthic communities in Antarctica, focusing on a close-to-pristine area (Adélie Land). We investigated shell growth of the circum-Antarctic bivalve Laternula elliptica, considered a key species in these soft bottom benthic communities. Chondrophores of live-collected clams were prepared using standard sclerochronological methods to study the interannual variability of shell growth from 1996 to 2015. Our results show that the master chronology varied with sea-ice dynamics. When sea ice breaks up too early, sympagic algae do not have time to accumulate sufficiently high biomass, thus strongly limiting the energy input to the benthos. This negatively affects the physiological performance of L. elliptica, thereby altering their population dynamics and hence the functioning of these soft-bottom ecosystems.
SN  - 0141-1136
UR  - http://dx.doi.org/10.1016/j.marenvres.2023.106220
N1  - exported from refbase (http://publi.ipev.fr/polar_references/show.php?record=8661), last updated on Mon, 01 Jul 2024 15:40:57 +0200
ID  - JulienThebault2023
ER  -