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Stochastically driven adult–recruit associations of tree species on Barro Colorado Island
The spatial placement of recruits around adult conspecifics represents the accumulated outcome of several pattern-forming processes and mechanisms such as primary and secondary seed dispersal, habitat associations or Janzen–Connell effects. Studying the adult–recruit relationship should therefore al...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Royal Society
2014
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4123702/ https://www.ncbi.nlm.nih.gov/pubmed/25030984 http://dx.doi.org/10.1098/rspb.2014.0922 |
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author | Getzin, Stephan Wiegand, Thorsten Hubbell, Stephen P. |
author_facet | Getzin, Stephan Wiegand, Thorsten Hubbell, Stephen P. |
author_sort | Getzin, Stephan |
collection | PubMed |
description | The spatial placement of recruits around adult conspecifics represents the accumulated outcome of several pattern-forming processes and mechanisms such as primary and secondary seed dispersal, habitat associations or Janzen–Connell effects. Studying the adult–recruit relationship should therefore allow the derivation of specific hypotheses on the processes shaping population and community dynamics. We analysed adult–recruit associations for 65 tree species taken from six censuses of the 50 ha neotropical forest plot on Barro Colorado Island (BCI), Panama. We used point pattern analysis to test, at a range of neighbourhood scales, for spatial independence between recruits and adults, to assess the strength and type of departure from independence, and its relationship with species properties. Positive associations expected to prevail due to dispersal limitation occurred only in 16% of all cases; instead a majority of species showed spatial independence (≈73%). Independence described the placement of recruits around conspecific adults in good approximation, although we found weak and noisy signals of species properties related to seed dispersal. We hypothesize that spatial mechanisms with strong stochastic components such as animal seed dispersal overpower the pattern-forming effects of dispersal limitation, density dependence and habitat association, or that some of the pattern-forming processes cancel out each other. |
format | Online Article Text |
id | pubmed-4123702 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2014 |
publisher | The Royal Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-41237022014-09-07 Stochastically driven adult–recruit associations of tree species on Barro Colorado Island Getzin, Stephan Wiegand, Thorsten Hubbell, Stephen P. Proc Biol Sci Research Articles The spatial placement of recruits around adult conspecifics represents the accumulated outcome of several pattern-forming processes and mechanisms such as primary and secondary seed dispersal, habitat associations or Janzen–Connell effects. Studying the adult–recruit relationship should therefore allow the derivation of specific hypotheses on the processes shaping population and community dynamics. We analysed adult–recruit associations for 65 tree species taken from six censuses of the 50 ha neotropical forest plot on Barro Colorado Island (BCI), Panama. We used point pattern analysis to test, at a range of neighbourhood scales, for spatial independence between recruits and adults, to assess the strength and type of departure from independence, and its relationship with species properties. Positive associations expected to prevail due to dispersal limitation occurred only in 16% of all cases; instead a majority of species showed spatial independence (≈73%). Independence described the placement of recruits around conspecific adults in good approximation, although we found weak and noisy signals of species properties related to seed dispersal. We hypothesize that spatial mechanisms with strong stochastic components such as animal seed dispersal overpower the pattern-forming effects of dispersal limitation, density dependence and habitat association, or that some of the pattern-forming processes cancel out each other. The Royal Society 2014-09-07 /pmc/articles/PMC4123702/ /pubmed/25030984 http://dx.doi.org/10.1098/rspb.2014.0922 Text en http://creativecommons.org/licenses/by/3.0/ © 2014 The Authors. Published by the Royal Society under the terms of the Creative Commons Attribution License http://creativecommons.org/licenses/by/3.0/, which permits unrestricted use, provided the original author and source are credited. |
spellingShingle | Research Articles Getzin, Stephan Wiegand, Thorsten Hubbell, Stephen P. Stochastically driven adult–recruit associations of tree species on Barro Colorado Island |
title | Stochastically driven adult–recruit associations of tree species on Barro Colorado Island |
title_full | Stochastically driven adult–recruit associations of tree species on Barro Colorado Island |
title_fullStr | Stochastically driven adult–recruit associations of tree species on Barro Colorado Island |
title_full_unstemmed | Stochastically driven adult–recruit associations of tree species on Barro Colorado Island |
title_short | Stochastically driven adult–recruit associations of tree species on Barro Colorado Island |
title_sort | stochastically driven adult–recruit associations of tree species on barro colorado island |
topic | Research Articles |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4123702/ https://www.ncbi.nlm.nih.gov/pubmed/25030984 http://dx.doi.org/10.1098/rspb.2014.0922 |
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