Arid
DOI10.1186/s12915-017-0435-x
Spatial phylogenetics of the native California flora
Thornhill, Andrew H.1; Baldwin, Bruce G.; Freyman, William A.; Nosratinia, Sonia; Kling, Matthew M.; Morueta-Holme, Naia; Madsen, Thomas P.; Ackerly, David D.; Mishler, Brent D.
通讯作者Thornhill, Andrew H.
来源期刊BMC BIOLOGY
ISSN1741-7007
出版年2017
卷号15
英文摘要

Background: California is a world floristic biodiversity hotspot where the terms neo-and paleo-endemism were first applied. Using spatial phylogenetics, it is now possible to evaluate biodiversity from an evolutionary standpoint, including discovering significant areas of neo-and paleo-endemism, by combining spatial information from museum collections and DNA-based phylogenies. Here we used a distributional dataset of 1.39 million herbarium specimens, a phylogeny of 1083 operational taxonomic units (OTUs) and 9 genes, and a spatial randomization test to identify regions of significant phylogenetic diversity, relative phylogenetic diversity, and phylogenetic endemism (PE), as well as to conduct a categorical analysis of neo-and paleo-endemism (CANAPE).


Results: We found (1) extensive phylogenetic clustering in the South Coast Ranges, southern Great Valley, and deserts of California; (2) significant concentrations of short branches in the Mojave and Great Basin Deserts and the South Coast Ranges and long branches in the northern Great Valley, Sierra Nevada foothills, and the northwestern and southwestern parts of the state; (3) significant concentrations of paleo-endemism in Northwestern California, the northern Great Valley, and western Sonoran Desert, and neo-endemism in the White-Inyo Range, northern Mojave Desert, and southern Channel Islands. Multiple analyses were run to observe the effects on significance patterns of using different phylogenetic tree topologies (uncalibrated trees versus time-calibrated ultrametric trees) and using different representations of OTU ranges (herbarium specimen locations versus species distribution models).


Conclusions: These analyses showed that examining the geographic distributions of branch lengths in a statistical framework adds a new dimension to California floristics that, in comparison with climatic data, helps to illuminate causes of endemism. In particular, the concentration of significant PE in more arid regions of California extends previous ideas about aridity as an evolutionary stimulus. The patterns seen are largely robust to phylogenetic uncertainty and time calibration but are sensitive to the use of occurrence data versus modeled ranges, indicating that special attention toward improving geographic distributional data should be top priority in the future for advancing understanding of spatial patterns of biodiversity.


英文关键词California flora Spatial phylogenetics Phylogenetic diversity Phylogenetic endemism CANAPE Evolution Species distribution modeling
类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000413971900003
WOS关键词MOLECULAR EVOLUTION ; DIVERGENCE TIMES ; ABSOLUTE RATES ; RANGE LIMITS ; DIVERSITY ; ENDEMISM ; PLANTS ; HOTSPOTS ; AGE ; PATTERNS
WOS类目Biology
WOS研究方向Life Sciences & Biomedicine - Other Topics
来源机构University of California, Berkeley
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/197903
作者单位1.Univ Calif Berkeley, Univ & Jepson Herbaria, 1001 Valley Life Sci Bldg, Berkeley, CA 94720 USA;
2.Univ Calif Berkeley, Dept Integrat Biol, 1001 Valley Life Sci Bldg, Berkeley, CA 94720 USA
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GB/T 7714
Thornhill, Andrew H.,Baldwin, Bruce G.,Freyman, William A.,et al. Spatial phylogenetics of the native California flora[J]. University of California, Berkeley,2017,15.
APA Thornhill, Andrew H..,Baldwin, Bruce G..,Freyman, William A..,Nosratinia, Sonia.,Kling, Matthew M..,...&Mishler, Brent D..(2017).Spatial phylogenetics of the native California flora.BMC BIOLOGY,15.
MLA Thornhill, Andrew H.,et al."Spatial phylogenetics of the native California flora".BMC BIOLOGY 15(2017).
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