Admiralty Bay Benthos Diversity—A census of a complex polar ecosystem

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• 作者：Jacek Siciń ; ski^a ; ^{sicinski@biol.uni.lodz.pl} ; Krzysztof Jaż ; dż ; ewski^a ; Claude De Broyer^b ; Piotr Presler^a ; Ryszard Ligowski^a ; Edmundo F. Nonato^c ; Thais N. Corbisier^c ; Monica A.V. Petti^c ; Tania A.S. Brito^d ; Helena P. Lavrado^e ; Magdalena BŁ ; aż ; ewicz-Paszkowycz^a ; Krzysztof Pabis^a ; Anna Jaż ; dż ; ewska^a ; Lucia S. Campos^e
• 关键词：Antarctica ; King George Island ; Admiralty Bay ; Benthos ; Biodiversity ; Community ecology
• 刊名：Deep Sea Research Part II: Topical Studies in Oceanography
• 出版年：2011
• 出版时间：January 2011
• 年：2011
• 卷：58
• 期：1-2
• 页码：30-48
• 全文大小：1850 K

文摘

A thorough census of Admiralty Bay benthic biodiversity was completed through the synthesis of data, acquired from more than 30 years of observations. Most of the available records arise from successive Polish and Brazilian Antarctic expeditions organized since 1977 and 1982, respectively, but also include new data from joint collecting efforts during the International Polar Year (2007–2009). Geological and hydrological characteristics of Admiralty Bay and a comprehensive species checklist with detailed data on the distribution and nature of the benthic communities are provided. Approximately 1300 species of benthic organisms (excluding bacteria, fungi and parasites) were recorded from the bay’s entire depth range (0–500 m). Generalized classifications and the descriptions of soft-bottom and hard-bottom invertebrate communities are presented. A time-series analysis showed seasonal and interannual changes in the shallow benthic communities, likely to be related to ice formation and ice melt within the bay. As one of the best studied regions in the maritime Antarctic Admiralty Bay represents a legacy site, where continued, systematically integrated data sampling can evaluate the effects of climate change on marine life. Both high species richness and high assemblage diversity of the Admiralty Bay shelf benthic community have been documented against the background of habitat heterogeneity.