Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1111/gcb.16013 |
Adaptive strategies of sponges to deoxygenated oceans | |
Valerio Micaroni; Francesca Strano; Rob McAllen; Lisa Woods; John Turner; Luke Harman; James J. Bell | |
2021-12-18 | |
发表期刊 | Global Change Biology |
出版年 | 2021 |
英文摘要 | Ocean deoxygenation is one of the major consequences of climate change. In coastal waters, this process can be exacerbated by eutrophication, which is contributing to an alarming increase in the so-called ‘dead zones’ globally. Despite its severity, the effect of reduced dissolved oxygen has only been studied for a very limited number of organisms, compared to other climate change impacts such as ocean acidification and warming. Here, we experimentally assessed the response of sponges to moderate and severe simulated hypoxic events. We ran three laboratory experiments on four species from two different temperate oceans (NE Atlantic and SW Pacific). Sponges were exposed to a total of five hypoxic treatments, with increasing severity (3.3, 1.6, 0.5, 0.4 and 0.13 mg O2 L−1, over 7–12-days). We found that sponges are generally very tolerant of hypoxia. All the sponges survived in the experimental conditions, except Polymastia crocea, which showed significant mortality at the lowest oxygen concentration (0.13 mg O2 L−1, lethal median time: 286 h). In all species except Suberites carnosus, hypoxic conditions do not significantly affect respiration rate down to 0.4 mg O2 L−1, showing that sponges can uptake oxygen at very low concentrations in the surrounding environment. Importantly, sponges displayed species-specific phenotypic modifications in response to the hypoxic treatments, including physiological, morphological and behavioural changes. This phenotypic plasticity likely represents an adaptive strategy to live in reduced or low oxygen water. Our results also show that a single sponge species (i.e., Suberites australiensis) can display different strategies at different oxygen concentrations. Compared to other sessile organisms, sponges generally showed higher tolerance to hypoxia, suggesting that sponges could be favoured and survive in future deoxygenated oceans. |
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/344201 |
专题 | 气候变化 资源环境科学 |
推荐引用方式 GB/T 7714 | Valerio Micaroni,Francesca Strano,Rob McAllen,et al. Adaptive strategies of sponges to deoxygenated oceans[J]. Global Change Biology,2021. |
APA | Valerio Micaroni.,Francesca Strano.,Rob McAllen.,Lisa Woods.,John Turner.,...&James J. Bell.(2021).Adaptive strategies of sponges to deoxygenated oceans.Global Change Biology. |
MLA | Valerio Micaroni,et al."Adaptive strategies of sponges to deoxygenated oceans".Global Change Biology (2021). |
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