کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4534787 1626368 2012 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Oxygen control on Holocene cold-water coral development in the eastern Mediterranean Sea
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات زمین شناسی
پیش نمایش صفحه اول مقاله
Oxygen control on Holocene cold-water coral development in the eastern Mediterranean Sea
چکیده انگلیسی

Continuous sedimentary records from an eastern Mediterranean cold-water coral ecosystem thriving in intermediate water depths (∼600 m) reveal a temporary extinction of cold-water corals during the Early to Mid Holocene from 11.4–5.9 cal kyr BP. Benthic foraminiferal assemblage analysis shows low-oxygen conditions of 2 ml l−1 during the same period, compared to bottom-water oxygen values of 4–5 ml l−1 before and after the coral-free interval. The timing of the corals' demise coincides with the sapropel S1 event, during which the deep eastern Mediterranean basin turned anoxic. Our results show that during the sapropel S1 event low oxygen conditions extended to the rather shallow depths of our study site in the Ionian Sea and caused the cold-water corals temporary extinction. This first evidence for the sensitivity of cold-water corals to low oceanic oxygen contents suggests that the projected expansion of tropical oxygen minimum zones resulting from global change will threaten cold-water coral ecosystems in low latitudes in the same way that ocean acidification will do in the higher latitudes.


► Records of Holocene cold-water coral (CWC) development in the eastern Mediterranean Sea.
► Low oxygen concentrations caused the temporary demise of CWCs.
► First sedimentary evidence for oxygen control on long-term CWC growth.
► Future expansion of tropical oxygen minimum zones will form a threat to CWC ecosystems.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Deep Sea Research Part I: Oceanographic Research Papers - Volume 62, April 2012, Pages 89–96
نویسندگان
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