Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.15307 |
Rapid deep ocean deoxygenation and acidification threaten life on Northeast Pacific seamounts | |
Tetjana Ross; Cherisse Du Preez; Debby Ianson | |
2020-09-14 | |
发表期刊 | Global Change Biology |
出版年 | 2020 |
英文摘要 | Anthropogenic climate change is causing our oceans to lose oxygen and become more acidic at an unprecedented rate, threatening marine ecosystems and their associated animals. In deep‐sea environments, where conditions have typically changed over geological timescales, the associated animals, adapted to these stable conditions, are expected to be highly vulnerable to any change or direct human impact. Our study coalesces one of the longest deep‐sea observational oceanographic time series, reaching back to the 1960s, with a modern visual survey that characterizes almost two vertical kilometers of benthic seamount ecosystems. Based on our new and rigorous analysis of the Line P oceanographic monitoring data, the upper 3,000 m of the Northeast Pacific (NEP) has lost 15% of its oxygen in the last 60 years. Over that time, the oxygen minimum zone (OMZ), ranging between approximately 480 and 1,700 m, has expanded at a rate of 3.0 ± 0.7 m/year (due to deepening at the bottom). Additionally, carbonate saturation horizons above the OMZ have been shoaling at a rate of 1–2 m/year since the 1980s. Based on our visual surveys of four NEP seamounts, these deep‐sea features support ecologically important taxa typified by long life spans, slow growth rates, and limited mobility, including habitat‐forming cold water corals and sponges, echinoderms, and fish. By examining the changing conditions within the narrow realized bathymetric niches for a subset of vulnerable populations, we resolve chemical trends that are rapid in comparison to the life span of the taxa and detrimental to their survival. If these trends continue as they have over the last three to six decades, they threaten to diminish regional seamount ecosystem diversity and cause local extinctions. This study highlights the importance of mitigating direct human impacts as species continue to suffer environmental changes beyond our immediate control. |
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/295279 |
专题 | 气候变化 资源环境科学 |
推荐引用方式 GB/T 7714 | Tetjana Ross,Cherisse Du Preez,Debby Ianson. Rapid deep ocean deoxygenation and acidification threaten life on Northeast Pacific seamounts[J]. Global Change Biology,2020. |
APA | Tetjana Ross,Cherisse Du Preez,&Debby Ianson.(2020).Rapid deep ocean deoxygenation and acidification threaten life on Northeast Pacific seamounts.Global Change Biology. |
MLA | Tetjana Ross,et al."Rapid deep ocean deoxygenation and acidification threaten life on Northeast Pacific seamounts".Global Change Biology (2020). |
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