Orchid Species Richness along Elevational and Environmental Gradients in Yunnan, China

doi:10.1371/journal.pone.0142621

	Orchid Species Richness along Elevational and Environmental Gradients in Yunnan, China
	Zhang,Shi-Bao; Chen,Wen-Yun; Huang,Jia-Lin; Bi,Ying-Feng; Yang,Xue-Fei
	2015-11-10
发表期刊	PLOS ONE
卷号	10 期号:11
摘要	The family Orchidaceae is not only one of the most diverse families of flowering plants, but also one of the most endangered plant taxa. Therefore, understanding how its species richness varies along geographical and environmental gradients is essential for conservation efforts. However, such knowledge is rarely available, especially on a large scale. We used a database extracted from herbarium records to investigate the relationships between orchid species richness and elevation, and to examine how elevational diversity in Yunnan Province, China, might be explained by mid-domain effect (MDE), species-area relationship (SAR), water-energy dynamics (WED), Rapoport's Rule, and climatic variables. This particular location was selected because it is one of the primary centers of distribution for orchids. We recorded 691 species that span 127 genera and account for 88.59% of all confirmed orchid species in Yunnan. Species richness, estimated at 200-m intervals along a slope, was closely correlated with elevation, peaking at 1395 to 1723 m. The elevational pattern of orchid richness was considerably shaped by MDE, SAR, WED, and climate. Among those four predictors, climate was the strongest while MDE was the weakest for predicting the elevational pattern of orchid richness. Species richness showed parabolic responses to mean annual temperature (MAT) and mean annual precipitation (MAP), with maximum richness values recorded at 13.7 to 17.7 degrees C for MAT and 1237 to 1414 mm for MAP. Rapoport's Rule also helped to explain the elevational pattern of species richness in Yunnan, but those influences were not entirely uniform across all methods. These results suggested that the elevational pattern of orchid species richness in Yunnan is collectively shaped by several mechanisms related to geometric constraints, size of the land area, and environments. Because of the dominant role of climate in determining orchid richness, our findings may contribute to a better understanding of the potential effects of climate change on orchid diversity, and the development of conservation strategies for orchids.
DOI	10.1371/journal.pone.0142621
收录类别	SCI
语种	英语
WOS记录号	WOS:000364430700142
引用统计
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/25248
专题	资源植物与生物技术所级重点实验室
推荐引用方式 GB/T 7714	Zhang,Shi-Bao,Chen,Wen-Yun,Huang,Jia-Lin,et al. Orchid Species Richness along Elevational and Environmental Gradients in Yunnan, China[J]. PLOS ONE,2015,10(11).
APA	Zhang,Shi-Bao,Chen,Wen-Yun,Huang,Jia-Lin,Bi,Ying-Feng,&Yang,Xue-Fei.(2015).Orchid Species Richness along Elevational and Environmental Gradients in Yunnan, China.PLOS ONE,10(11).
MLA	Zhang,Shi-Bao,et al."Orchid Species Richness along Elevational and Environmental Gradients in Yunnan, China".PLOS ONE 10.11(2015).

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