Background

Semi-enclosed bays are important links in the material cycle and energy flow between terrestrial and marine ecosystems. They are also areas of intense human activities and heavily influenced by such activities as aquaculture, industrial and agricultural wastewater discharge. The rate of biodiversity loss and changes in ecosystems have prompted research into the relationship between species diversity and ecosystem functioning. Studies have shown that application of functional diversity indices is useful for assessing the status of ecosystem functioning. We quantitatively sampled macrofauna in a semi-enclosed bay in four seasons and analyzed the relationship between species, functional diversity and secondary production, biomass and feeding functional groups of macrofauna.

Results

The annual secondary production was 325.01 kJ m⁻² year⁻¹. Detritivorous, carnivorous and planktophagous feeders were the main functional groups of macrofauna. Differences in the spatial–temporal distribution of functional groups were influenced by Ruditapes philippinarum and Hemileucon bidentatus. Functional richness had significant negative correlations with macrofaunal biomass and secondary production. Functional divergence, functional dispersion and Rao's quadratic entropy had highly significant negative correlations with macrofaunal biomass and secondary production.

Conclusion

The results showed that high overlap of ecological niches can increase competition for habitat resources, leading to a decline in biomass and secondary production. In addition, aquaculture could promote the use of habitat resources to some extent, while it could increase competition for ecosystem resources (including habitat resources, atmospheric resources, water resources, etc.). Functional diversity is a good indicator for the ecosystem functioning and the competition status for habitat resources, which can provide insights into the current state of ecosystem function.

中文翻译：

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大型动物组合的功能多样性和二次生产可以提供生物多样性与生态系统功能关系的见解

背景

半封闭海湾是陆地和海洋生态系统物质循环和能量流动的重要环节。它们也是人类活动密集区，受水产养殖、工农业废水排放等活动影响较大。生物多样性丧失的速度和生态系统的变化促使人们对物种多样性与生态系统功能之间的关系进行研究。研究表明，功能多样性指数的应用有助于评估生态系统功能状况。我们对半封闭海湾的大型动物进行了四个季节的定量采样，分析了大型动物的物种、功能多样性与二次生产、生物量和摄食功能群之间的关系。

结果

年二次产量为325.01 kJ m ^-2 年^-1。碎屑食性、肉食性和浮游性食性是大型动物的主要功能类群。功能群时空分布的差异受到菲律宾蛤仔和半齿半齿鱼的影响。功能丰富度与大型动物生物量和次级生产呈显着负相关。功能分歧、功能分散和Rao二次熵与大型动物生物量和次级生产呈极显着负相关。

结论

结果表明，生态位的高度重叠会加剧对栖息地资源的竞争，导致生物量和二次生产下降。此外，水产养殖可以在一定程度上促进栖息地资源的利用，同时也可以加剧对生态系统资源（包括栖息地资源、大气资源、水资源等）的竞争。功能多样性是生态系统功能和栖息地资源竞争状况的良好指标，可以洞察生态系统功能的现状。