Statistical modeling of sea ice concentration in the northwest region of the Antarctic Peninsula

Hillebrand, Fernando Luis; Bremer, Ulisses Franz; Freitas, Marcos Wellausen Dias de; Costi, Juliana; Júnior, Cláudio Wilson Mendes; Arigony-Neto, Jorge; Simões, Jefferson Cárdia; Rosa, Cristiano Niederauer da; Jesus, Janisson Batista de

doi:10.1007/s10661-021-08843-3

Cited by 1 publication

(1 citation statement)

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“…Whereas Antarctic intertidal ecosystems normally experience significant seasonal and shorter-term variation in ice conditions, salinity, and temperature (Peck et al 2006, Kuklinski & Balazya 2014, Clarke & Beaumont 2020, they are currently facing challenges from drastic changes in multiple environmental factors including sea surface temperature, pH, salinity, and sedimentation rates (Convey & Peck 2019, Brasier et al 2021, Figuerola et al 2021. Associated with increasing temperature, reduction in coastal ice extent and duration will expose extensive new ice-free intertidal areas in the near future, especially in the region of the Antarctic Peninsula (Griffiths & Waller 2016, Convey & Peck 2019, Siegert et al 2019, Hillebrand et al 2021). These newly available areas have the potential to be colonized by faunal assemblages of local or distant origin , Lagger et al 2017, Fraser et al 2018, Galera et al 2018, López-Farrán et al 2021.…”

Section: Introductionmentioning

confidence: 99%

A pioneer morphological and genetic study of the intertidal fauna of the Gerlache Strait (Antarctic Peninsula)

Jossart

Bauman

Moreau

et al. 2023

Environ Monit Assess

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The underexplored intertidal ecosystems of Antarctica are facing rapid changes in important environmental factors. Associated with temperature increase, reduction in coastal ice will soon expose new ice-free areas that will be colonized by local or distant biota. To enable detection of future changes in faunal composition, a biodiversity baseline is urgently required. Here, we evaluated intertidal faunal diversity at 13 locations around the Gerlache Strait (western Antarctic Peninsula), using a combination of a quadrat approach, morphological identification and genetic characterization. Our data highlight a community structure comprising four generally distributed and highly abundant species (the flatworm Obrimoposthia wandeli, the bivalve Kidderia subquadrata, and the gastropods Laevilitorina umbilicata and Laevilitorina caliginosa) as well as 79 rarer and less widely encountered species. The most abundant species thrive in the intertidal zone due to their ability to either survive overwinter in situ or to rapidly colonize this zone when conditions allow. In addition, we confirmed the presence of multiple trophic levels at nearly all locations, suggesting that complex inter-specific interactions occur within these communities. Diversity indices contrasted between sampling locations (from 3 to 32 species) and multivariate approaches identified three main groups. This confirms the importance of environmental heterogeneity in shaping diversity patterns within the investigated area. Finally, we provide the first genetic and photographic baseline of the Antarctic intertidal fauna (106 sequences, 137 macrophotographs), as well as preliminary insights on the biogeography of several species. Taken together, these results provide a timely catalyst to assess the diversity and to inform studies of the potential resilience of these intertidal communities.

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