气候变化领域集成服务门户(CCPortal): Environmental heterogeneity at two spatial scales affects litter diversity-decomposition relationships

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DOI	10.1002/ecy.4280
	Environmental heterogeneity at two spatial scales affects litter diversity-decomposition relationships
	Ospina-Bautista, Fabiola; Srivastava, Diane S.; Realpe, Emilio; Fernandez, Ana Maria
发表日期	2024
ISSN	0012-9658
EISSN	1939-9170
起始页码	105
结束页码	5
卷号	105 期号:5
英文摘要	The effects of biodiversity on ecological processes have been experimentally evaluated mainly at the local scale under homogeneous conditions. To scale up experimentally based biodiversity-functioning relationships, there is an urgent need to understand how such relationships are affected by the environmental heterogeneity that characterizes larger spatial scales. Here, we tested the effects of an 800-m elevation gradient (a large-scale environmental factor) and forest habitat (a fine-scale factor) on litter diversity-decomposition relationships. To better understand local and landscape scale mechanisms, we partitioned net biodiversity effects into complementarity, selection, and insurance effects as applicable at each scale. We assembled different litter mixtures in aquatic microcosms that simulated natural tree holes, replicating mixtures across blocks nested within forest habitats (edge, interior) and elevations (low, mid, high). We found that net biodiversity and complementarity effects increased over the elevation gradient, with their strength modified by forest habitat and the identity of litter in mixtures. Complementarity effects at local and landscape scales were greatest for combinations of nutrient-rich and nutrient-poor litters, consistent with nutrient transfer mechanisms. By contrast, selection effects were consistently weak and negative at both scales. Selection effects at the landscape level were due mainly to nonrandom overyielding rather than spatial insurance effects. Our findings demonstrate that the mechanisms by which litter diversity affects decomposition are sensitive to environmental heterogeneity at multiple scales. This has implications for the scaling of biodiversity-ecosystem function relationships and suggests that future shifts in environmental conditions due to climate change or land use may impact the functioning of aquatic ecosystems.
英文关键词	context dependence; ecosystem processes; environmental heterogeneity; freshwater ecosystem; insurance effect; monoculture; phytotelma; polyculture
语种	英语
WOS研究方向	Environmental Sciences & Ecology
WOS类目	Ecology
WOS记录号	WOS:001195554800001
来源期刊	ECOLOGY
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/301437
作者单位	Universidad de los Andes (Colombia); Universidad de Caldas; University of British Columbia; University of British Columbia
推荐引用方式 GB/T 7714	Ospina-Bautista, Fabiola,Srivastava, Diane S.,Realpe, Emilio,et al. Environmental heterogeneity at two spatial scales affects litter diversity-decomposition relationships[J],2024,105(5).
APA	Ospina-Bautista, Fabiola,Srivastava, Diane S.,Realpe, Emilio,&Fernandez, Ana Maria.(2024).Environmental heterogeneity at two spatial scales affects litter diversity-decomposition relationships.ECOLOGY,105(5).
MLA	Ospina-Bautista, Fabiola,et al."Environmental heterogeneity at two spatial scales affects litter diversity-decomposition relationships".ECOLOGY 105.5(2024).