Benthic meltwater fjord habitats formed by rapid glacier recession on King George Island, Antarctica

Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences
Kerstin JeroschDoris Abele

Abstract

The coasts of the West Antarctic Peninsula are strongly influenced by glacier meltwater discharge. The spatial structure and biogeochemical composition of inshore habitats are shaped by large quantities of terrigenous particulate material deposited in the vicinity of the coast, which impacts the pelagic and benthic ecosystems. We used a multitude of geochemical and environmental variables to identify the radius extension of the meltwater impact from the Fourcade Glacier into the fjord system of Potter Cove, King George Island. The k-means cluster algorithm, canonical correspondence analysis, variance analysis and Tukey's post hoc multiple comparison tests were applied to define and cluster coastal meltwater habitats. A minimum of 10 clusters were needed to classify the 8 km2 study area into meltwater fjord habitats (MFHs), fjord habitats and marine habitats. Strontium content in surface sediments is the main geochemical indicator for lithogenic creek discharge in Potter Cove. Furthermore, bathymetry, glacier distance and geomorphic positioning are the essential habitats explaining variables. The mean and maximum MFH extent amounted to 1 km and 2 km, respectively. Extrapolation of the identified meltwater impact ranges to King G...Continue Reading

References

Sep 24, 2013·Environmental Science. Processes & Impacts·Krista E H SlemmonsKevin Simon
Jul 6, 2014·Marine Environmental Research·Luciana TorreRicardo Sahade
Dec 25, 2015·Science Advances·Ricardo SahadeDoris Abele
May 16, 2018·Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences·Michael P MeredithDoris Abele
May 16, 2018·Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences·Ulrike FalkPablo Pölcher

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Citations

May 16, 2018·Philosophical Transactions. Series A, Mathematical, Physical, and Engineering Sciences·Katharine R HendryHugh W Ducklow
Dec 7, 2019·Science Advances·Peter Convey, Lloyd S Peck
Feb 7, 2021·The Science of the Total Environment·Maria OsińskaKornelia Anna Wójcik-Długoborska

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