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Interspecific Functional Convergence and Divergence and Intraspecific Negative Density Dependence Underlie the Seed-to-Seedling Transition in Tropical Trees
Umana, MN (Umana, Maria Natalia)[ 1 ]; Forero-Montana, J (Forero-Montana, Jimena)[ 2 ]; Muscarella, R (Muscarella, Robert)[ 3 ]; Nytch, CJ (Nytch, Christopher J.)[ 2 ]; Thompson, J (Thompson, Jill)[ 4,5 ]; Uriarte, M (Uriarte, Maria)[ 6 ]; Zimmerman, J (Zimmerman, Jess)[ 2,5 ]; Swenson, NG (Swenson, Nathan G.)[ 1,7 ]
2016
Source PublicationAMERICAN NATURALIST
Volume187Issue:1Pages:99-109
AbstractThe seed-to-seedling transition constitutes a critical bottleneck in the life history of plants and represents a major determinant of species composition and abundance. However, we have surprisingly little knowledge regarding the forces driving this ontogenetic transition. Here we utilize information regarding organismal function to investigate the strength of intra-and interspecific negative density dependence during the seed-to-seedling transition in Puerto Rican tree species. Our analyses were implemented at individual sites and across an entire 16-ha forest plot, spanning 6 years. The functional richness of seedling assemblages was significantly lower than expected given the seed assemblages, but the functional evenness was significantly higher than expected, indicating the simultaneous importance of constraints on the overall phenotypic space and trait differences for successful transitions from seed to seedling. The results were consistent across years. Within species, we also found evidence for strong intraspecific negative density dependence, where the probability of transition was proportionally lower when in a site with high conspecific density. These results suggest that filtering of similar phenotypes across species and strong negative density dependence within and among species are simultaneously driving the structure and dynamics of tropical tree assemblages during this critical life-history transition.
KeywordCommunity Assembly Functional Ecology Functional Richness Seed-to-seedling Transition Tropical Tree Ecology
Document Type期刊论文
Identifierhttp://ir.xtbg.org.cn/handle/353005/9657
Collection其他
Recommended Citation
GB/T 7714
Umana, MN ,Forero-Montana, J ,Muscarella, R ,et al. Interspecific Functional Convergence and Divergence and Intraspecific Negative Density Dependence Underlie the Seed-to-Seedling Transition in Tropical Trees[J]. AMERICAN NATURALIST,2016,187(1):99-109.
APA Umana, MN .,Forero-Montana, J .,Muscarella, R .,Nytch, CJ .,Thompson, J .,...&Swenson, NG .(2016).Interspecific Functional Convergence and Divergence and Intraspecific Negative Density Dependence Underlie the Seed-to-Seedling Transition in Tropical Trees.AMERICAN NATURALIST,187(1),99-109.
MLA Umana, MN ,et al."Interspecific Functional Convergence and Divergence and Intraspecific Negative Density Dependence Underlie the Seed-to-Seedling Transition in Tropical Trees".AMERICAN NATURALIST 187.1(2016):99-109.
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