DOI: 10.1016/j.marpolbul.2016.04.054
Scopus记录号: 2-s2.0-84971673787
论文题名: Excess seawater nutrients, enlarged algal symbiont densities and bleaching sensitive reef locations: 1. Identifying thresholds of concern for the Great Barrier Reef, Australia
作者: Wooldridge S.A.
刊名: Marine Pollution Bulletin
ISSN: 0025-326X
EISSN: 1879-3363
出版年: 2015
语种: 英语
英文关键词: Bleaching resistance
; Coral health
; Resilience
; Symbiosis
; Water quality
Scopus关键词: Bleaching
; Cleaning
; Eutrophication
; Nutrients
; Seawater
; Water quality
; Coral health
; Energy reserves
; Field observations
; Great Barrier Reef
; Low resistance
; Resilience
; Species specifics
; Symbiosis
; Reefs
Scopus学科分类: Agricultural and Biological Sciences: Aquatic Science
; Earth and Planetary Sciences: Oceanography
; Environmental Science: Pollution
英文摘要: Here, I contribute new insight into why excess seawater nutrients are an increasingly identified feature at reef locations that have low resistance to thermal stress. Specifically, I link this unfavourable synergism to the development of enlarged (suboptimal) zooxanthellae densities that paradoxically limit the capacity of the host coral to build tissue energy reserves needed to combat periods of stress. I explain how both theoretical predictions and field observations support the existence of species-specific 'optimal' zooxanthellae densities ~1.0-3.0×106 cellscm-2. For the central Great Barrier Reef (GBR), excess seawater nutrients that permit enlarged zooxanthellae densities beyond this optimum range are linked with seawater chlorophyll a >0.45μg·L-1; a eutrophication threshold previously shown to correlate with a significant loss in species for hard corals and phototrophic octocorals on the central GBR, and herein shown to correlate with enhanced bleaching sensitivity during the 1998 and 2002 mass bleaching events. © 2016 Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/85873
Appears in Collections: 过去全球变化的重建 全球变化的国际研究计划
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作者单位: Catchment to Reef Management Solutions, Newcastle, NSW 2280, Australia
Recommended Citation:
Wooldridge S.A.. Excess seawater nutrients, enlarged algal symbiont densities and bleaching sensitive reef locations: 1. Identifying thresholds of concern for the Great Barrier Reef, Australia[J]. Marine Pollution Bulletin,2015-01-01