Shifts in species abundance of large benthic foraminifera Amphistegina: the possible effects of Tropical Cyclone Ita

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• 作者：Martina Prazeres ; T. Edward Roberts ; John M. Pandolfi
• 关键词：Great Barrier Reef ; Symbiont ; bearing foraminifera ; Depth distribution ; Community structure
• 刊名：Coral Reefs
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：36
• 期：1
• 页码：305-309
• 全文大小：
• 刊物类别：Earth and Environmental Science
• 刊物主题：Freshwater & Marine Ecology; Oceanography;
• 出版者：Springer Berlin Heidelberg
• ISSN：1432-0975
• 卷排序：36

文摘

On the Great Barrier Reef (GBR), the large benthic foraminifera Amphistegina lobifera, A. lessonii and A. radiata occur in shallow (<30 m) areas and have a clear distribution gradient. In April 2014, Severe Tropical Cyclone (TC) Ita impacted the northern region of the GBR. We surveyed the leeward slope of Yonge Reef at 6 and 18 m, in August 2013 and 2014. Results showed an overall decline in abundance of Amphistegina and a shift in proportion at both depths between 2013 and 2014. The shallow-dweller A. lobifera was severely affected; however, the deep-dweller A. radiata and the generalist A. lessonii only declined at 6 m and increased in abundance at 18 m. Patterns observed are likely linked to the occurrence of TC Ita. We propose that differing population-level source–sink dynamics should be considered when exploring persistence and recovery patterns over depth in foraminiferal communities.