Craven, Dylan James

[["dc.bibliographiccitation.firstpage","1643"],["dc.bibliographiccitation.issue","10"],["dc.bibliographiccitation.journal","Forest Ecology and Management"],["dc.bibliographiccitation.lastpage","1653"],["dc.bibliographiccitation.volume","261"],["dc.contributor.author","Craven, D."],["dc.contributor.author","Dent, D."],["dc.contributor.author","Braden, D."],["dc.contributor.author","Ashton, M. S."],["dc.contributor.author","Berlyn, G. P."],["dc.contributor.author","Hall, J. S."],["dc.date.accessioned","2020-06-15T14:08:23Z"],["dc.date.available","2020-06-15T14:08:23Z"],["dc.date.issued","2011"],["dc.description.abstract","elative to closed-canopy tropical forests, tree seedlings planted in open grown areas are exposed to higher light intensity, air temperatures, vapor pressure deficit, and greater seasonal fluxes of plant available water than mature tropical forests. The species-specific adaptive capacity to respond to variable precipitation and seasonality in open grown conditions, therefore, is likely to affect species performance in large-scale reforestation efforts. In the present study, we compared the photosynthetic characteristics of eight tropical tree species within and between seasons at two study sites with contrasting dry season intensities. All species except Pseudosamanea guachapele reduced leaf physiological function between the wet and dry seasons. The contrasting severity of seasonal drought stress at the study sites constrained growth rates and photosynthetic characteristics differently. Variation of photosynthetic characteristics at the species level was high, particularly in the dry season. Faster growing species at the less seasonal site, Terminalia amazonia, Inga punctata, Colubrina glandulosa, and Acacia mangium, exhibited a greater adaptive capacity than the other species to down-regulate leaf photosynthesis between seasons. As the dry season was more severe at the more seasonal site, most species strongly reduced physiological function regardless of relative growth rates, except two species (Tectona grandis and P. guachapele) with widespread distributions and relatively high drought tolerance. Our results underscore the need to consider seasonal drought tolerance when selecting tree species for specific reforestation sites."],["dc.identifier.doi","10.1016/j.foreco.2010.09.017"],["dc.identifier.isi","WOS:000290924400011"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/66268"],["dc.identifier.url","http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcAuth=ORCID&SrcApp=OrcidOrg&DestLinkType=FullRecord&DestApp=WOS_CPL&KeyUT=WOS:000290924400011&KeyUID=WOS:000290924400011"],["dc.language.iso","en"],["dc.relation.issn","0378-1127"],["dc.title","Seasonal variability of photosynthetic characteristics influences growth of eight tropical tree species at two sites with contrasting precipitation in Panama"],["dc.type","journal_article"],["dc.type.internalPublication","no"],["dspace.entity.type","Publication"]]

[["dc.bibliographiccitation.firstpage","63"],["dc.bibliographiccitation.lastpage","79"],["dc.contributor.author","Craven, D."],["dc.contributor.author","Cedeño, N."],["dc.contributor.author","Mariscal, E."],["dc.contributor.author","Deago, J."],["dc.contributor.author","Wishnie, M. H."],["dc.contributor.author","Hall, J. S."],["dc.contributor.editor","Montagnini, Florencia"],["dc.contributor.editor","Finney, C."],["dc.date.accessioned","2020-06-16T07:33:52Z"],["dc.date.available","2020-06-16T07:33:52Z"],["dc.date.issued","2011"],["dc.description.abstract","Reforestation with mixed plantations of native tree species potentially offers myriad ecological and economic benefits, including the use of nitrogen-fixing tree species to facilitate the growth of high-value timber species. Growth, survival, physiological characteristics, and a species-specific competition index for Terminalia amazonia (J.F. Gmel.) Exell and Dalbergia retusa Hemsl., established in an additive experimental design in Panama, were evaluated to compare their performance in mixtures and at different spacings. Two years after establishment, the studied species differed significantly in terms of growth, survival, physiological characteristics and competition. For the same characteristics, however, neither species responded significantly to either experimental treatment. Terminalia amazonia was less tolerant of drought stress in pure plots than in mixed plots, indicating that the crown dimensions and structure of D. retusa ameliorated growing conditions within the understory of these plots. The competition index of T. amazonia remained the same regardless of spacing, which also demonstrated the positive effect of D. retusa on water relations. We conclude that N-fixing, pioneer species like D. retusa can be used in mixed species plantations to ameliorate growing conditions for high-value timber species with low tolerance to drought stress."],["dc.identifier.scopus","2-s2.0-84892122349"],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/66337"],["dc.identifier.url","http://www.scopus.com/inward/record.url?eid=2-s2.0-84892122349&partnerID=MN8TOARS"],["dc.language.iso","en"],["dc.publisher","Nova Science Publishers"],["dc.relation.isbn","9781611221312"],["dc.relation.ispartof","Restoring degraded landscapes with native species in Latin America"],["dc.title","Amelioration of growing conditions in mixed species plantation of Terminalia Amazonia and nitrogen-fixing Dalbergia Retusa"],["dc.type","book_chapter"],["dc.type.internalPublication","unknown"],["dspace.entity.type","Publication"]]

[["dc.contributor.author","Craven, D. J."],["dc.contributor.author","van Breugel, M."],["dc.contributor.author","Hall, J. S."],["dc.contributor.author","Ashton, M. S."],["dc.contributor.author","Berlyn, G. P."],["dc.date.accessioned","2020-06-18T07:00:06Z"],["dc.date.available","2020-06-18T07:00:06Z"],["dc.date.issued","2012"],["dc.description.abstract","Background/Question/Methods Functional traits delineate important dimensions of ecological variation in plant communities and, in doing so, reveal mechanisms that drive ecological processes. In tropical secondary forests, changes in species composition during succession have been well documented and are assumed to reflect shifts in adaptive ecological strategies, from fast growth and shade intolerance to slow growth and shade tolerance. In the present study, we examine interspecific variation in the relative abundance of 42 abundant woody species using an extensive suite of leaf and plant functional traits in a tropical secondary forest in Central Panama. Specifically, we address: a) the extent to which plant functional traits explain interspecific differences in relative abundance of 42 abundant woody species during secondary succession using structural equation models and b) which plant functional traits best predict changes in relative abundance during secondary succession using a random decision-tree model. Results/Conclusions During the early stages of secondary succession (0 – 12 y), wood density, maximum tree height and leaf functional traits were positively correlated with interspecific variation in relative abundance through direct and indirect causal paths (Squared Multiple Correlation, 22 – 48 %). For the older secondary forest (13 – 20 y), the data supported a simpler causal path model in which maximum tree height explained 41 % of variation in relative basal area and wood density explained 18% of variation in relative stem density. Species-specific changes in relative abundance during secondary succession were best predicted by maximum tree height, mass-based photosynthetic capacity, and leaf cellulose content. In general, the random decision-tree model robustly predicted whether relative abundance increased or decreased during secondary succession (Somer’s D = 0.77 - 0.79). However, misclassified species were predominantly those with functional trait values associated with late-successional species, but whose relative abundance decreased during secondary succession. Our findings provide evidence that both acquisitive and conservative ecological strategies allow species to obtain high relative abundances during the early stages of secondary succession, yet due to changes in the abiotic and biotic environment, only conservative ecological strategies are adaptive in the later stages of secondary succession. Further, our results reveal that coordinated variation in a subset of functional traits, each representing different aspects of plant response to environmental conditions, modulated contrasting patterns of relative abundance."],["dc.identifier.uri","https://resolver.sub.uni-goettingen.de/purl?gro-2/66465"],["dc.language.iso","en"],["dc.notes.preprint","yes"],["dc.relation.conference","97th ESA Annual Convention 2012"],["dc.relation.eventend","2012-08-10"],["dc.relation.eventlocation","Portland"],["dc.relation.eventstart","2012-08-05"],["dc.relation.iserratumof","yes"],["dc.title","Coordination of plant functional traits in predicting relative abundance of 42 tropical tree species during secondary succession in Central Panama"],["dc.type","conference_paper"],["dc.type.internalPublication","no"],["dspace.entity.type","Publication"]]