Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.15065 |
Too hot to handle: Unprecedented seagrass death driven by marine heatwave in a World Heritage Area | |
Simone Strydom; Kathy Murray; Shaun Wilson; Bart Huntley; Michael Rule; Michael Heithaus; Cindy Bessey; Gary A. Kendrick; Derek Burkholder; Matthew W. Fraser; Katherine Zdunic | |
2020-04-08 | |
发表期刊 | Global Change Biology |
出版年 | 2020 |
英文摘要 | The increased occurrence of extreme climate events, such as marine heatwaves (MHWs), has resulted in substantial ecological impacts worldwide. To date, metrics of thermal stress within marine systems have focussed on coral communities, and less is known about measuring stress relevant to other primary producers, such as seagrasses. An extreme MHW occurred across the Western Australian coastline in the austral summer of 2010–2011, exposing marine communities to summer seawater temperatures 2–5°C warmer than average. Using a combination of satellite imagery and in situ assessments, we provide detailed maps of seagrass coverage across the entire Shark Bay World Heritage Area (ca. 13,000 km2) before (2002 and 2010) and after the MHW (2014 and 2016). Our temporal analysis of these maps documents the single largest loss in dense seagrass extent globally (1,310 km2) following an acute disturbance. Total change in seagrass extent was spatially heterogeneous, with the most extensive declines occurring in the Western Gulf, Wooramel Bank and Faure Sill. Spatial variation in seagrass loss was best explained by a model that included an interaction between two heat stress metrics, the most substantial loss occurring when degree heating weeks (DHWm) was ≥10 and the number of days exposed to extreme sea surface temperature during the MHW (DaysOver) was ≥94. Ground truthing at 622 points indicated that change in seagrass cover was predominantly due to loss of Amphibolis antarctica rather than Posidonia australis, the other prominent seagrass at Shark Bay. As seawater temperatures continue to rise and the incidence of MHWs increase globally, this work will provide a basis for identifying areas of meadow degradation, or stability and recovery, and potential areas of resilience. |
领域 | 气候变化 ; 资源环境 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/248995 |
专题 | 气候变化 资源环境科学 |
推荐引用方式 GB/T 7714 | Simone Strydom,Kathy Murray,Shaun Wilson,et al. Too hot to handle: Unprecedented seagrass death driven by marine heatwave in a World Heritage Area[J]. Global Change Biology,2020. |
APA | Simone Strydom.,Kathy Murray.,Shaun Wilson.,Bart Huntley.,Michael Rule.,...&Katherine Zdunic.(2020).Too hot to handle: Unprecedented seagrass death driven by marine heatwave in a World Heritage Area.Global Change Biology. |
MLA | Simone Strydom,et al."Too hot to handle: Unprecedented seagrass death driven by marine heatwave in a World Heritage Area".Global Change Biology (2020). |
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