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Can marine reserves restore lost ecosystem functioning? A global synthesis

首页    Meta分析论文或工具推荐    Can marine reserves restore lost ecosystem functioning? A global synthesis

推荐理由:这篇文章可以说是meta分析和数据整合都用上了,分别采用了加权和不加权两种方法分析,其中加权的就是meta分析方法,不加权的采用的就是一般的混合效应模型,正文报道了加权,也就是meta分析的结果,未加权的结果放在附件中,可以看出加权的结果更为保守。

论文题目:全球综述:海洋保护区可以恢复失去的生态系功能吗?

发表期刊:Ecology

发表时间:2019年4月

 

摘要:

Marine protected areas (MPAs) have grown exponentially, emerging as a widespread tool to conserve biodiversity and enhance fisheries production. Although numerous empirical studies and global syntheses have evaluated the effects of MPAs on community structure (e.g., biodiversity), no broad assessment concerning their capacity to influence ecological processes (e.g., species interactions) exists. Here, we present meta‐analyses that compare rates of predation and herbivory on a combined 32 species across 30 MPAs spanning 85° of latitude. Our analyses synthesize the fate of 15,225 field experiment assays, and demonstrate that MPAs greatly increased predation intensity on animals but not herbivory on macroalgae or seagrass. Predation risk, quantified as the odds of prey being eaten, was largely determined by predator abundance and biomass within reserves. At MPAs with the greatest predator accumulation, the odds of predation increased to nearly 49:1, as opposed to 1:1 at MPAs where predators actually declined. Surprisingly, we also found evidence that predation risk declined with increased sea‐surface temperature. Greater predation risk within MPAs was consistent with predator and prey population abundance estimates, where predators increased 4.4‐fold within MPAs, whereas prey decreased 2.2‐fold. For herbivory, the lack of change may have been driven by functional redundancy and the inability of reserves to increase herbivore abundance relative to fished zones in our sample. Overall, this work highlights the capacity of MPAs to restore a critical ecosystem function such as predation, which mediates energy flows and community assembly within natural systems. However, our review of the literature also uncovers relatively few studies that have quantified the effects of MPAs on ecosystem function, highlighting a key gap in our understanding of how protected areas may alter ecological processes and deliver ecosystem services. From a historical perspective, these findings suggest that modern levels of predation in the coastal oceans may currently only be a fraction of the baseline prior to human exploitation.

2019年5月27日 09:14
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