Demographic consequences of heterogeneity in conspecific density dependence among mast-fruiting tropical trees
The role of conspecific density dependence (CDD) in the maintenance of species richness is a central focus of tropical forest ecology. However, tests of CDD often ignore the integrated effects of CDD over multiple life stages and their long-term impacts on population demography. We combined a 10-yea...
| Main Authors: | , , , , , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Royal Society Publishing
2022
|
| Subjects: | |
| Online Access: | https://eprints.ums.edu.my/id/eprint/34199/1/Demographic%20consequences%20of%20heterogeneity%20in%20conspecific%20density%20dependence%20among%20mast-fruiting%20tropical%20trees.ABSTRACT.pdf |
| _version_ | 1825715012452220928 |
|---|---|
| author | Michael J. O'Brien Andy Hector Roman T. Kellenberger Colin R. Maycock Robert Ong Christopher D. Philipson Jennifer S. Powers Glen Reynolds David F. R. P. Burslem |
| author_facet | Michael J. O'Brien Andy Hector Roman T. Kellenberger Colin R. Maycock Robert Ong Christopher D. Philipson Jennifer S. Powers Glen Reynolds David F. R. P. Burslem |
| author_sort | Michael J. O'Brien |
| collection | UMS |
| description | The role of conspecific density dependence (CDD) in the maintenance of species richness is a central focus of tropical forest ecology. However, tests of CDD often ignore the integrated effects of CDD over multiple life stages and their long-term impacts on population demography. We combined a 10-year time series of seed production, seedling recruitment and sapling and tree demography of three dominant Southeast Asian tree species that adopt a mast-fruiting phenology. We used these data to construct individual- based models that examine the effects of CDD on population growth rates (ë) across life-history stages. Recruitment was driven by positive CDD for all species, supporting the predator satiation hypothesis, while negative CDD affected seedling and sapling growth of two species, significantly reducing ë. This negative CDD on juvenile growth overshadowed the positive CDD of recruitment, suggesting the cumulative effects of CDD during seedling and sapling development has greater importance than the positive CDD during infrequent masting events. Overall, CDD varied among positive, neutral and negative effects across life-history stages for all species, suggesting that assessments of CDD on transitions between just two stages (e.g. seeds seedlings or juveniles mature trees) probably misrepresent the importance of CDD on population growth and stability. |
| first_indexed | 2024-03-06T03:20:19Z |
| format | Article |
| id | ums.eprints-34199 |
| institution | Universiti Malaysia Sabah |
| language | English |
| last_indexed | 2024-03-06T03:20:19Z |
| publishDate | 2022 |
| publisher | Royal Society Publishing |
| record_format | dspace |
| spelling | ums.eprints-341992022-09-22T08:12:34Z https://eprints.ums.edu.my/id/eprint/34199/ Demographic consequences of heterogeneity in conspecific density dependence among mast-fruiting tropical trees Michael J. O'Brien Andy Hector Roman T. Kellenberger Colin R. Maycock Robert Ong Christopher D. Philipson Jennifer S. Powers Glen Reynolds David F. R. P. Burslem QH540-549.5 Ecology The role of conspecific density dependence (CDD) in the maintenance of species richness is a central focus of tropical forest ecology. However, tests of CDD often ignore the integrated effects of CDD over multiple life stages and their long-term impacts on population demography. We combined a 10-year time series of seed production, seedling recruitment and sapling and tree demography of three dominant Southeast Asian tree species that adopt a mast-fruiting phenology. We used these data to construct individual- based models that examine the effects of CDD on population growth rates (ë) across life-history stages. Recruitment was driven by positive CDD for all species, supporting the predator satiation hypothesis, while negative CDD affected seedling and sapling growth of two species, significantly reducing ë. This negative CDD on juvenile growth overshadowed the positive CDD of recruitment, suggesting the cumulative effects of CDD during seedling and sapling development has greater importance than the positive CDD during infrequent masting events. Overall, CDD varied among positive, neutral and negative effects across life-history stages for all species, suggesting that assessments of CDD on transitions between just two stages (e.g. seeds seedlings or juveniles mature trees) probably misrepresent the importance of CDD on population growth and stability. Royal Society Publishing 2022-06-29 Article PeerReviewed text en https://eprints.ums.edu.my/id/eprint/34199/1/Demographic%20consequences%20of%20heterogeneity%20in%20conspecific%20density%20dependence%20among%20mast-fruiting%20tropical%20trees.ABSTRACT.pdf Michael J. O'Brien and Andy Hector and Roman T. Kellenberger and Colin R. Maycock and Robert Ong and Christopher D. Philipson and Jennifer S. Powers and Glen Reynolds and David F. R. P. Burslem (2022) Demographic consequences of heterogeneity in conspecific density dependence among mast-fruiting tropical trees. Proceedings of the Royal Society B: Biological Sciences, 289. ISSN 0962-8452 https://royalsocietypublishing.org/doi/10.1098/rspb.2022.0739 https://doi.org/10.1098/rspb.2022.0739 https://doi.org/10.1098/rspb.2022.0739 |
| spellingShingle | QH540-549.5 Ecology Michael J. O'Brien Andy Hector Roman T. Kellenberger Colin R. Maycock Robert Ong Christopher D. Philipson Jennifer S. Powers Glen Reynolds David F. R. P. Burslem Demographic consequences of heterogeneity in conspecific density dependence among mast-fruiting tropical trees |
| title | Demographic consequences of heterogeneity in conspecific density dependence among mast-fruiting tropical trees |
| title_full | Demographic consequences of heterogeneity in conspecific density dependence among mast-fruiting tropical trees |
| title_fullStr | Demographic consequences of heterogeneity in conspecific density dependence among mast-fruiting tropical trees |
| title_full_unstemmed | Demographic consequences of heterogeneity in conspecific density dependence among mast-fruiting tropical trees |
| title_short | Demographic consequences of heterogeneity in conspecific density dependence among mast-fruiting tropical trees |
| title_sort | demographic consequences of heterogeneity in conspecific density dependence among mast fruiting tropical trees |
| topic | QH540-549.5 Ecology |
| url | https://eprints.ums.edu.my/id/eprint/34199/1/Demographic%20consequences%20of%20heterogeneity%20in%20conspecific%20density%20dependence%20among%20mast-fruiting%20tropical%20trees.ABSTRACT.pdf |
| work_keys_str_mv | AT michaeljobrien demographicconsequencesofheterogeneityinconspecificdensitydependenceamongmastfruitingtropicaltrees AT andyhector demographicconsequencesofheterogeneityinconspecificdensitydependenceamongmastfruitingtropicaltrees AT romantkellenberger demographicconsequencesofheterogeneityinconspecificdensitydependenceamongmastfruitingtropicaltrees AT colinrmaycock demographicconsequencesofheterogeneityinconspecificdensitydependenceamongmastfruitingtropicaltrees AT robertong demographicconsequencesofheterogeneityinconspecificdensitydependenceamongmastfruitingtropicaltrees AT christopherdphilipson demographicconsequencesofheterogeneityinconspecificdensitydependenceamongmastfruitingtropicaltrees AT jenniferspowers demographicconsequencesofheterogeneityinconspecificdensitydependenceamongmastfruitingtropicaltrees AT glenreynolds demographicconsequencesofheterogeneityinconspecificdensitydependenceamongmastfruitingtropicaltrees AT davidfrpburslem demographicconsequencesofheterogeneityinconspecificdensitydependenceamongmastfruitingtropicaltrees |