Guang Hao , Xiaoqin Chen , Zhibo Du , Nan Yang , Meiyang Li , Yue Gao , Jiaan Liang , Lei Chen , Hongyuan Li
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引用次数: 0
Abstract
Recent studies have explored changes in biodiversity and ecosystem function relationships in natural ecosystems under global climatic changes. However, little is known about whether these patterns and regulatory mechanisms can be applied to engineered ecosystems. On a green roof ecosystem, one of the most rapidly developing engineered ecosystems in recent years, we manipulated species richness and N addition, coupled with phylogenetic and functional analyses, to explore the determinants of green roof ecosystem function. Our results suggested that low N enrichment strengthened the positive relationships between species richness and ecosystem function. Species richness increased ecosystem function mainly by increasing phylogenetic diversity and functional dispersion of aboveground and belowground traits (niche complementarity effect). N enrichment directly increased ecosystem function, while it decreased ecosystem function through its negative effects on community weighted means of aboveground and belowground traits (mass ratio effect). Additionally, aboveground and belowground traits affected ecosystem function through different ways, and belowground traits played more direct roles than aboveground traits. Our findings emphasize that increasing the phylogenetic diversity (PD) and functional dispersion (FD) of traits could consistently improve ecosystem performance, irrespective of N enrichment. This study provides new insights into the relationships between biodiversity and ecosystem function for engineered ecosystems under global climatic changes, which can help practitioners optimize the design and management of engineered ecosystems.
期刊介绍:
Ecological engineering has been defined as the design of ecosystems for the mutual benefit of humans and nature. The journal is meant for ecologists who, because of their research interests or occupation, are involved in designing, monitoring, or restoring ecosystems, and can serve as a bridge between ecologists and engineers.
Specific topics covered in the journal include: habitat reconstruction; ecotechnology; synthetic ecology; bioengineering; restoration ecology; ecology conservation; ecosystem rehabilitation; stream and river restoration; reclamation ecology; non-renewable resource conservation. Descriptions of specific applications of ecological engineering are acceptable only when situated within context of adding novelty to current research and emphasizing ecosystem restoration. We do not accept purely descriptive reports on ecosystem structures (such as vegetation surveys), purely physical assessment of materials that can be used for ecological restoration, small-model studies carried out in the laboratory or greenhouse with artificial (waste)water or crop studies, or case studies on conventional wastewater treatment and eutrophication that do not offer an ecosystem restoration approach within the paper.