Resource Heterogeneity, Not Resource Quantity, Plays an Important Role in Determining Tree Species Diversity in Two Species-Rich Forests
Zhang, Liwen1,2; Mi, Xiangcheng2; Harrison, Rhett D.3; Yang, Bo4; Man, Xingxing2; Ren, Haibao2; Ma, Keping2
Source PublicationFRONTIERS IN ECOLOGY AND EVOLUTION
ISSN2296-701X
2020-07-16
Volume8Pages:8
Keywordresource quantity resource heterogeneity variation partitioning species richness ecological niche plant density spatial covariation
DOI10.3389/fevo.2020.00224
Corresponding AuthorMi, Xiangcheng(mixiangcheng@ibcas.ac.cn)
AbstractThere is still considerable debate about the relative importance of resource heterogeneity and resource quantity in the maintenance of species diversity in a community. The resource heterogeneity hypothesis proposes that spatial heterogeneity of limiting resources and inter-specific differences in resource requirements will determine species richness. In contrast, the resource quantity hypothesis predicts that average resource supply rates contribute to species richness by their effects on plant density and stochastic population dynamics. However, the evaluation of the two hypotheses in observational studies is associated with a major methodological challenge as average resource supply rate often covaries with resource heterogeneity. Using a novel approach derived from the relationships between average resource supply rate, resource heterogeneity (calculated as the standard deviation of environmental factors) and plant density in the resource hypotheses, we evaluated the relative importance of resource quantity and resource heterogeneity with a variation partitioning model in Gutianshan (GTS) forest plot, China, and Barro Colorado Island (BCI) forest plot, Central Panama. We found that resource quantity explained much less of the variation in species richness than resource heterogeneity in both GTS and BCI (44.5% vs. 4.9% in GTS and 20.4% vs. 0.8% in BCI at the 20 x 20 m scale, 57.5% vs. 3.4% in GTS at the 40 x 40 m scale, and 34.5% vs. 2.6% in BCI at the 50 x 50 m scale). We also found that resource heterogeneity governed species richness in GTS, whereas spatial processes dominated species diversity in BCI. Moreover, most of the effect of resource heterogeneity and resource quantity on species richness overlapped with that of spatial processes. This result indicates that most effects of resources could also be explained by spatial processes, such as dispersal limitation. Therefore, resource heterogeneity and spatial processes, but not resource quantity, played an important role in determining species diversity in these two old-growth forests. This is in contrast to the results of several manipulative studies, which found that resource quantity governed species diversity when one or a limited number of resources were considered. This suggests that the processes determining species richness along ecological gradients are complicated and determined by the interaction of various processes.
Funding OrganizationNSF ; National Science and Technology Support Program ; NSFC Project ; Youth Innovation Promotion Association CAS ; STRI soils initiative
Indexed BySCI
Language英语
WOS KeywordBROAD-LEAVED FOREST ; ENVIRONMENTAL HETEROGENEITY ; COMMUNITY COMPOSITION ; HABITAT ASSOCIATIONS ; BETA DIVERSITY ; PLANT ; PRODUCTIVITY ; AVAILABILITY ; COEXISTENCE ; HYPOTHESIS
WOS Research AreaEnvironmental Sciences & Ecology
WOS IDWOS:000556770400001
Citation statistics
Cited Times:1[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.yic.ac.cn/handle/133337/28566
Collection中科院海岸带环境过程与生态修复重点实验室_海岸带环境过程实验室
中科院海岸带环境过程与生态修复重点实验室
Corresponding AuthorMi, Xiangcheng
Affiliation1.Chinese Acad Sci, CAS Key Lab Coastal Environm Proc & Ecol Remediat, Yantai Inst Coastal Zone Res YIC, Yantai, Peoples R China
2.Chinese Acad Sci, Inst Bot, State Key Lab Vegetat & Environm Change, Beijing, Peoples R China
3.World Agroforestry Ctr ICRAF, Eastern & Southern Africa Reg Off, Lusaka, Zambia
4.Jingdezhen Univ, Key Lab Plant Resources & Biodivers Jiangxi Prov, Jingdezhen, Peoples R China
Recommended Citation
GB/T 7714
Zhang, Liwen,Mi, Xiangcheng,Harrison, Rhett D.,et al. Resource Heterogeneity, Not Resource Quantity, Plays an Important Role in Determining Tree Species Diversity in Two Species-Rich Forests[J]. FRONTIERS IN ECOLOGY AND EVOLUTION,2020,8:8.
APA Zhang, Liwen.,Mi, Xiangcheng.,Harrison, Rhett D..,Yang, Bo.,Man, Xingxing.,...&Ma, Keping.(2020).Resource Heterogeneity, Not Resource Quantity, Plays an Important Role in Determining Tree Species Diversity in Two Species-Rich Forests.FRONTIERS IN ECOLOGY AND EVOLUTION,8,8.
MLA Zhang, Liwen,et al."Resource Heterogeneity, Not Resource Quantity, Plays an Important Role in Determining Tree Species Diversity in Two Species-Rich Forests".FRONTIERS IN ECOLOGY AND EVOLUTION 8(2020):8.
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