Life History And Population Dynamics Of A Tree Species In Tropical Semi-arid Climate: A Case Study With Cordia Oncocalyx

dc.creatorSilveira
dc.creatorAndrea P.; Martins
dc.creatorFernando R.; Araujo
dc.creatorFrancisca S.
dc.date2017
dc.datemaio
dc.date2017-11-13T13:20:28Z
dc.date2017-11-13T13:20:28Z
dc.date.accessioned2018-03-29T05:54:07Z
dc.date.available2018-03-29T05:54:07Z
dc.identifierAustral Ecology. Wiley-blackwell, v. 42, p. 329 - 340, 2017.
dc.identifier1442-9985
dc.identifier1442-9993
dc.identifierWOS:000399744800008
dc.identifier10.1111/aec.12447
dc.identifierhttp://onlinelibrary.wiley.com/doi/10.1111/aec.12447/abstract
dc.identifierhttp://repositorio.unicamp.br/jspui/handle/REPOSIP/327635
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/1364660
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.descriptionIn semi-arid climates, plant population dynamics are strongly influenced by the amount and temporal distribution of rainfall. We monitored a population of the tree species Cordia oncocalyx (Boraginaceae) for 24months in the dry thorny woodland of semi-arid northeastern Brazil, to investigate which life-history traits allow this tree to be locally dominant. We used horizontal life tables and a Lefkovitch matrix and tested for relationships among demographic parameters of seedling, infant, juvenile, immature, virginile and reproductive ontogenetic stages with rainfall and canopy openness. Germination and recruitment occurred in the rainy months, and dry-season mortality occurred only in seedlings (76% and 100%, first and second years, respectively) and infants (3% and 6%). Juveniles showed greater height growth under more open canopies (Spearman correlation coefficient=0.24), suggesting that light availability influences growth. The population growth rate was =1.0336, and the highest sensitivity occurred in the infant-juvenile transition. Our results show light as a restrictive growth factor for plants in the juvenile stage and confirm the strong influence of rainfall on the dynamics of trees in a seasonally dry environment. The formation of a persistent seed bank with germination concentrated at the rainfall onset but spreading over the rainy season are strategies that hedge bets before establishment. The formation of a bank of infants, which can resume growth as soon as there is water, hedges bets after establishment. We attribute the positive population growth rate of Cordia oncocalyx to survival strategies allowing bet-hedging both before and after establishment.
dc.description42
dc.description3
dc.description329
dc.description340
dc.descriptionResearch Foundation of Ceara (FUNCAP) [093.01.00/09]
dc.descriptionBrazilian Research Council (CNPq) [308853/2010-5, 304051/2007-1]
dc.descriptionState University of Ceara (UECE)
dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.languageEnglish
dc.publisherWiley-Blackwell
dc.publisherHoboken
dc.relationAustral Ecology
dc.rightsfechado
dc.sourceWOS
dc.subjectBet-hedging
dc.subjectDeciduous Woodland
dc.subjectDemography
dc.subjectMatrix Model
dc.subjectPopulation Growth Rate
dc.subjectSeed Bank
dc.titleLife History And Population Dynamics Of A Tree Species In Tropical Semi-arid Climate: A Case Study With Cordia Oncocalyx
dc.typeArtículos de revistas


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