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首页> 美国卫生研究院文献>other >Non-Linear Interactions Determine the Impact of Sea-Level Rise on Estuarine Benthic Biodiversity and Ecosystem Processes
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Non-Linear Interactions Determine the Impact of Sea-Level Rise on Estuarine Benthic Biodiversity and Ecosystem Processes

机译：非线性相互作用决定了海平面上升对河口底栖生物多样性和生态系统过程的影响

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Sea-level rise induced by climate change may have significant impacts on the ecosystem functions and ecosystem services provided by intertidal sediment ecosystems. Accelerated sea-level rise is expected to lead to steeper beach slopes, coarser particle sizes and increased wave exposure, with consequent impacts on intertidal ecosystems. We examined the relationships between abundance, biomass, and community metabolism of benthic fauna with beach slope, particle size and exposure, using samples across a range of conditions from three different locations in the UK, to determine the significance of sediment particle size beach slope and wave exposure in affecting benthic fauna and ecosystem function in different ecological contexts. Our results show that abundance, biomass and oxygen consumption of intertidal macrofauna and meiofauna are affected significantly by interactions among sediment particle size, beach slope and wave exposure. For macrofauna on less sloping beaches, the effect of these physical constraints is mediated by the local context, although for meiofauna and for macrofauna on intermediate and steeper beaches, the effects of physical constraints dominate. Steeper beach slopes, coarser particle sizes and increased wave exposure generally result in decreases in abundance, biomass and oxygen consumption, but these relationships are complex and non-linear. Sea-level rise is likely to lead to changes in ecosystem structure with generally negative impacts on ecosystem functions and ecosystem services. However, the impacts of sea-level rise will also be affected by local ecological context, especially for less sloping beaches.
机译：气候变化引起的海平面上升可能会对潮间带沉积物生态系统提供的生态系统功能和生态系统服务产生重大影响。加速的海平面上升预计将导致更陡峭的海滩坡度，更粗的颗粒尺寸和更多的波浪暴露，从而对潮间带生态系统产生影响。我们使用来自英国三个不同地点的一系列条件下的样本，研究了底栖动物丰富度，生物量和底栖动物群落代谢与海滩坡度，粒径和暴露量之间的关系，以确定沉积物粒径海滩坡度和沉积物的重要性。暴露在不同生态环境中对底栖动物和生态系统功能的影响。我们的结果表明，潮间带大型动物和小型动物的丰度，生物量和耗氧量受到沉积物粒径，海滩坡度和波浪暴露之间相互作用的显着影响。对于坡度较小的海滩上的大型动物，这些物理约束的影响由当地环境来调节，尽管对于中型和较陡峭的海滩上的大型动物，物理约束的影响占主导地位。较陡的海滩坡度，较粗的粒径和增加的波浪暴露通常会导致丰度，生物量和氧气消耗量减少，但这些关系是复杂且非线性的。海平面上升很可能导致生态系统结构发生变化，对生态系统功能和生态系统服务产生总体负面影响。但是，海平面上升的影响也将受到当地生态环境的影响，尤其是对于坡度较小的海滩。

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