气候变化领域集成服务门户(CCPortal): Plant functional diversity mediates indirect effects of land-use intensity on soil water conservation in the dry season of tropical areas

CCPortal

DOI	10.1016/j.foreco.2020.118646
	Plant functional diversity mediates indirect effects of land-use intensity on soil water conservation in the dry season of tropical areas
	Wen Z.; Zheng H.; Smith J.R.; Ouyang Z.
发表日期	2021
ISSN	0378-1127
卷号	480
英文摘要	Land-use intensification has led to biodiversity loss, which affects ecosystem properties and services by altering plant functional traits. However, the mechanistic pathways through which land-use intensity (LUI) affects ecosystem services across functional traits and ecosystem properties remain unclear. We studied the relationships among LUI, plant functional traits, ecosystem properties, and soil water conservation in tropical Hainan Island, China, where land-use changes, biodiversity loss, and seasonal drought have had severe impacts. Soil water conservation was represented by two complementary processes, namely soil water retention (SWR) and soil water capture (SWC). SWR and SWC were observed along a LUI gradient after 27 rainfall events (14 light, 10 moderate, and 3 heavy). We quantified the direct and indirect effects of LUI, the community-weighted mean (CWM) and functional divergence (FDvar) of water-related plant functional traits (tree height, leaf thickness, specific leaf area, and leaf dry matter content), and ecosystem properties on SWC and SWR using Bayesian structural equation models. The results showed that LUI did not affect SWC and SWR directly but presented indirect impacts via functional traits and ecosystem properties. Importantly, tree height FDvar mediated the most important indirect effect of LUI on both SWC and SWR. Tree height FDvar indirectly affected SWC through ecosystem properties, while the direction of the effect changed from negative to positive with increasing rainfall intensity, and promoted SWR directly and indirectly by increasing litter fall and soil organic matter. Our results further provide evidence of an indirect effect of LUI on soil water conservation primarily through tree height FDvar. Loss of functional diversity of plant height caused by LUI resulted in a decrease in SWR and SWC, indicating that seasonal drought causes increased impacts. The results emphasize that maintaining functional diversity of tree height in tropical land use is conducive for soil water conservation to mitigate increased intensity of seasonal drought predicted under climate change. © 2020 Elsevier B.V.
英文关键词	Biodiversity; Drought; Ecosystem service; Land-use intensity; Plant functional traits; Soil water
语种	英语
scopus关键词	Biodiversity; Climate change; Drought; Forestry; Land use; Plants (botany); Rain; Soil conservation; Soil moisture; Tropics; Water conservation; Ecosystem services; Functional diversity; Mechanistic pathways; Plant functional diversities; Soil organic matters; Soil water retention; Soil-water conservation; Structural equation models; Ecosystems; biodiversity; drought stress; dry season; functional role; land use change; litterfall; soil organic matter; soil water; species diversity; tropical region; water retention; Biodiversity; Drought; Forestry; Land Use; Rain; Tropics; China; Hainan
来源期刊	Forest Ecology and Management
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/154864
作者单位	State Key Laboratory of Urban and Regional Ecology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, China; University of Chinese Academy of Sciences, Beijing, China; Department of Biology, Stanford University, Stanford, CA, United States; Center for Conservation Biology, Stanford University, Stanford, CA, United States
推荐引用方式 GB/T 7714	Wen Z.,Zheng H.,Smith J.R.,et al. Plant functional diversity mediates indirect effects of land-use intensity on soil water conservation in the dry season of tropical areas[J],2021,480.
APA	Wen Z.,Zheng H.,Smith J.R.,&Ouyang Z..(2021).Plant functional diversity mediates indirect effects of land-use intensity on soil water conservation in the dry season of tropical areas.Forest Ecology and Management,480.
MLA	Wen Z.,et al."Plant functional diversity mediates indirect effects of land-use intensity on soil water conservation in the dry season of tropical areas".Forest Ecology and Management 480(2021).