Abstract:
PREMISE OF THE STUDY:Evolutionary and biogeographic history, including past environmental change and diversification processes, are likely to have influenced the expansion, migration, and extinction of populations, creating evolutionary legacy effects that influence regional species pools and the composition of communities. We consider the consequences of the diversification process in shaping trait evolution and assembly of oak-dominated communities throughout the continental United States (U.S.). METHODS:Within the U.S. oaks, we tested for phylogenetic and functional trait patterns at different spatial scales, taking advantage of a dated phylogenomic analysis of American oaks and the U.S. Forest Service (USFS) Forest Inventory and Analysis (FIA). KEY RESULTS:We find (1) phylogenetic overdispersion at small grain sizes throughout the U.S. across all spatial extents and (2) a shift from overdispersion to clustering with increasing grain sizes. Leaf traits have evolved in a convergent manner, and these traits are clustered in communities at all spatial scales, except in the far west, where species with contrasting leaf types co-occur. CONCLUSIONS:Our results support the hypotheses that (1) interspecific interactions were important in parallel adaptive radiation of the genus into a range of habitats across the continent and (2) that the diversification process is a critical driver of community assembly. Functional convergence of complementary species from distinct clades adapted to the same local habitats is a likely mechanism that allows distantly related species to coexist. Our findings contribute to an explanation of the long-term maintenance of high oak diversity and the dominance of the oak genus in North America.
journal_name
Am J Botjournal_title
American journal of botanyauthors
Cavender-Bares J,Kothari S,Meireles JE,Kaproth MA,Manos PS,Hipp ALdoi
10.1002/ajb2.1049subject
Has Abstractpub_date
2018-03-01 00:00:00pages
565-586issue
3eissn
0002-9122issn
1537-2197journal_volume
105pub_type
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journal_title:American journal of botany
pub_type: 杂志文章
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journal_title:American journal of botany
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journal_title:American journal of botany
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journal_title:American journal of botany
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更新日期:2009-08-01 00:00:00
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更新日期:2020-02-01 00:00:00
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更新日期:2011-12-01 00:00:00
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更新日期:2018-10-01 00:00:00
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journal_title:American journal of botany
pub_type: 杂志文章
doi:10.3732/ajb.1100546
更新日期:2012-07-01 00:00:00
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journal_title:American journal of botany
pub_type: 杂志文章
doi:10.3732/ajb.92.7.1085
更新日期:2005-07-01 00:00:00
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更新日期:2007-01-01 00:00:00
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pub_type: 杂志文章
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更新日期:2013-03-01 00:00:00
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更新日期:2013-01-01 00:00:00
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pub_type: 杂志文章
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更新日期:2011-05-01 00:00:00
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journal_title:American journal of botany
pub_type: 杂志文章
doi:10.3732/ajb.1600389
更新日期:2017-04-01 00:00:00
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journal_title:American journal of botany
pub_type: 杂志文章
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更新日期:2016-05-01 00:00:00
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更新日期:2013-06-01 00:00:00
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pub_type: 杂志文章
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