DOI: 10.1111/gcb.13175
论文题名: Caribbean mesophotic coral ecosystems are unlikely climate change refugia
作者: Smith T.B. ; Gyory J. ; Brandt M.E. ; Miller W.J. ; Jossart J. ; Nemeth R.S.
刊名: Global change biology
ISSN: 13652486
出版年: 2016
卷: 22, 期: 8 起始页码: 2756
结束页码: 2765
语种: 英语
英文关键词: climate change
; coral bleaching
; mesophotic coral reef ecosystems
; Orbicella spp.
; refugia
; thermocline
Scopus关键词: climate change
; coral bleaching
; coral reef
; hypothesis testing
; refugium
; thermocline
; animal
; Anthozoa
; Caribbean
; climate change
; coral reef
; ecosystem
; refugium
; Animals
; Anthozoa
; Caribbean Region
; Climate Change
; Coral Reefs
; Ecosystem
; Refugium
; Atlantic Ocean
; Caribbean Sea
; Anthozoa
; Scleractinia
英文摘要: Deeper coral reefs experience reduced temperatures and light and are often shielded from localized anthropogenic stressors such as pollution and fishing. The deep reef refugia hypothesis posits that light-dependent stony coral species at deeper depths are buffered from thermal stress and will avoid bleaching-related mass mortalities caused by increasing sea surface temperatures under climate change. This hypothesis has not been tested because data collection on deeper coral reefs is difficult. Here we show that deeper (mesophotic) reefs, 30-75 m depth, in the Caribbean are not refugia because they have lower bleaching threshold temperatures than shallow reefs. Over two thermal stress events, mesophotic reef bleaching was driven by a bleaching threshold that declines 0.26 °C every +10 m depth. Thus, the main premise of the deep reef refugia hypothesis that cooler environments are protective is incorrect; any increase in temperatures above the local mean warmest conditions can lead to thermal stress and bleaching. Thus, relatively cooler temperatures can no longer be considered a de facto refugium for corals and it is likely that many deeper coral reefs are as vulnerable to climate change as shallow water reefs. © 2015 John Wiley & Sons Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/61342
Appears in Collections: 影响、适应和脆弱性
There are no files associated with this item.
作者单位: Center for Marine and Environmental Studies, University of the Virgin Islands, #2 John Brewers Bay, St. Thomas, VI, 00802, USA; Inventory and Monitoring Program, National Park Service, Cruz Bay, St. John, VI, 00830, USA
Recommended Citation:
Smith T.B.,Gyory J.,Brandt M.E.,et al. Caribbean mesophotic coral ecosystems are unlikely climate change refugia[J]. Global change biology,2016-01-01,22(8)