气候变化领域集成服务门户(CCPortal): Deoxygenation following coral spawning and low-level thermal stress trigger mass coral mortality at Coral Bay, Ningaloo Reef

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DOI	10.1007/s00338-024-02476-x
	Deoxygenation following coral spawning and low-level thermal stress trigger mass coral mortality at Coral Bay, Ningaloo Reef
	Richards, Zoe T.; Haines, Lewis; Ross, Claire; Preston, Sophie; Matthews, Troy; Terriaca, Anthony; Black, Ethan; Lewis, Yvette; Mannolini, Josh; Dean, Patrick; Middleton, Vincent; Saunders, Ben
发表日期	2024
ISSN	0722-4028
EISSN	1432-0975
起始页码	43
结束页码	2
卷号	43 期号:2
英文摘要	Oxygen depletion is well recognized for its role in the degradation of tropical coral reefs. Extreme acute hypoxic events that lead to localized mass mortality and the formation of 'dead zones' (a region where few or no organisms can survive due to a lack of oxygen) are particularly concerning as they can result in wide-ranging losses of biodiversity, ecosystem productivity and functioning, economic prosperity, and wellbeing. In March of 2022, the annual coral spawning event at Bills Bay (Coral Bay, Ningaloo Reef, Western Australia) coincided with elevated seawater temperature, calm weather conditions and a flood tide resulting in coral spawn becoming trapped in Bills Bay. Immediately after, there was a mass fish kill, which is believed to have been caused by local eutrophication resulting in severe oxygen depletion. The impact the deoxygenation and thermal stress event had on benthic communities has not yet been quantified; hence, the principal aim of this study is to document the extent of change that occurred in the benthic communities before and after the 2022 coral spawning event over a spatial gradient from the nearshore to mid-reef. Percent coral cover in the Bay decreased from 55.62 +/- 2.26% in 2016-2018 and 70.44 +/- 5.24% in 2021 to 1.16 +/- 0.51% in 2022. Over the same period, the percent cover of turf algae increased from 27.40 +/- 2.00% in 2016-2018 and 24.66 +/- 6.67% in 2021 to 78.80 +/- 3.06% in 2022, indicating a dramatic phase shift occurred at Bills Bay. The abundance of healthy coral colonies recorded on replicated belt transects at nine sites declined from 3452 healthy individuals in 2018 to 153 individuals in 2022 and coral generic richness decreased by 84.61%, dropping from 26 genera in 2018 to 4 genera in 2022. Previously dominant genera such as Acropora,Montipora and Echinopora, were extirpated from survey sites. Isolated colonies of massive Porites spp. and encrusting Cyphastrea sp. survived the event and understanding the mechanisms underpinning their greater survivorship is an important area of future research. Long-term monitoring is recommended to track the community recovery process and improve our understanding of the longer-term implications of this acute mortality event on the ecological, socio-economic and cultural values of Ningaloo Reef.
英文关键词	Benthic community structure; Coral bleaching; Deoxygenation; Ningaloo Reef; Phase shift; Turf algae
语种	英语
WOS研究方向	Marine & Freshwater Biology
WOS类目	Marine & Freshwater Biology
WOS记录号	WOS:001176108500002
来源期刊	CORAL REEFS
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/305992
作者单位	Curtin University; Curtin University; Western Australian Museum; Curtin University
推荐引用方式 GB/T 7714	Richards, Zoe T.,Haines, Lewis,Ross, Claire,et al. Deoxygenation following coral spawning and low-level thermal stress trigger mass coral mortality at Coral Bay, Ningaloo Reef[J],2024,43(2).
APA	Richards, Zoe T..,Haines, Lewis.,Ross, Claire.,Preston, Sophie.,Matthews, Troy.,...&Saunders, Ben.(2024).Deoxygenation following coral spawning and low-level thermal stress trigger mass coral mortality at Coral Bay, Ningaloo Reef.CORAL REEFS,43(2).
MLA	Richards, Zoe T.,et al."Deoxygenation following coral spawning and low-level thermal stress trigger mass coral mortality at Coral Bay, Ningaloo Reef".CORAL REEFS 43.2(2024).