Shifts in species and phylogenetic diversity between sapling and tree communities indicate negative density dependence in a lowland rain forest

González, Mailyn; Roger, Aurélien; Courtois, Elodie A.; Jabot, Franck; Norden, Natalia; Paine, C. E. Timothy; Baraloto, Christopher; Thébaud, Christophe; Chave, Jérôme

doi:10.1111/j.1365-2745.2009.01607.x

Cited by 67 publications

(76 citation statements)

References 79 publications

(148 reference statements)

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The field of community phylogenetics is a promising avenue for gaining insight into community reassembly. Future studies integrating well-resolved phylogenies (Kress et al 2009, Gonza´lez et al 2010, demographic data and long-term monitoring will provide increased sensitivity for unraveling the mechanisms that determine community assembly in successional forests.…”

Section: Discussionmentioning

confidence: 99%

Demographic drivers of successional changes in phylogenetic structure across life‐history stages in plant communities

Norden

Letcher

Boukili

et al. 2012

Ecology

Self Cite

111

146

View full text Add to dashboard Cite

Abstract. To gain insight into the ecological processes driving community reassembly in disturbed ecosystems, we assessed the phylogenetic dispersion of early-and late-successional tree species occurring in lowland forests of northeastern Costa Rica. Early-successional species were more closely related than expected by chance, whereas late-successional species tended to be less closely related than expected by chance. Then, we evaluated temporal changes in the phylogenetic structure of seedling and tree assemblages in four 1-ha plots of secondary forests in this region. We found an increase in the phylogenetic evenness among tree individuals over time in all secondary tree assemblages, indicating that relatedness among tree individuals decreases as succession unfolds. This pattern was jointly promoted by recruitment and mortality processes, suggesting that increasing evenness was caused by the replacement of individuals of early-successional species from closely related lineages by late-successional species belonging to a wider diversity of lineages. Based on species occurrence, however, tree community reassembly did not show any significant phylogenetic trend over time. These results suggest that shifts in species abundance over succession have a greater impact on the phylogenetic structure of the community than the turnover of species. Seedling assemblages showed higher phylogenetic evenness than tree assemblages, suggesting that propagule colonization is an important process driving phylogenetic changes in species composition throughout succession. Overall, our findings showed that the phylogenetic structure of these successional communities varies at two temporal scales. At short timescales, decreased dominance by early-successional species over succession leads to increased evenness among tree individuals. At longer timescales, colonization processes result in increased phylogenetic evenness in seedling communities compared to tree communities, forecasting increasing phylogenetic evenness among adult individuals at late-successional stages.

show abstract

Section: Discussionmentioning

confidence: 99%

Demographic drivers of successional changes in phylogenetic structure across life‐history stages in plant communities

Norden

Letcher

Boukili

et al. 2012

Ecology

Self Cite

111

146

View full text Add to dashboard Cite

show abstract

“…Again results were mixed: juveniles can be more closely related or more distantly related than later life stages (Webb et al 2006, Swenson et al 2007, Gonzalez et al 2010, Jin et al 2015.…”

Section: Accepted Ar Ticlementioning

confidence: 99%

Forest tree neighborhoods are structured more by negative conspecific density dependence than by interactions among closely related species

et al. 2017

View full text Add to dashboard Cite

Interactions among neighbors influence the structure of communities of sessile organisms. Closely related species tend to share habitat and resource requirements and to interact with the same mutualists and natural enemies so that the strength of interspecific interactions tends to decrease with evolutionary divergence time. Nevertheless, the degree to which such phylogenetically related ecological interactions structure plant communities remains unclear. Using data from five large mapped forest plots combined with a DNA barcode mega‐phylogeny, we employed an individual‐based approach to assess the collective effects of focal tree size on neighborhood phylogenetic relatedness. Abundance‐weighted average divergence time for all neighbors (ADT_all) and for heterospecific neighbors only (ADT_hetero) were calculated for each individual of canopy tree species. Within local neighborhoods, we found phylogenetic composition changed with focal tree size. Specifically, significant increases in ADT_all with focal tree size were evident at all sites. In contrast, there was no significant change in ADT_hetero with tree size in four of the five sites for both sapling‐sized and all neighbors, even at the smallest neighbourhood scale (0–5 m), suggesting a limited role for phylogeny‐dependent interactions. However, there were inverse relationships between focal tree size and the proportion of heterospecific neighbors belonging to closely related species at some sites, providing evidence for negative phylogenetic density dependence. Overall, our results indicate that negative interaction with conspecifics had a much greater impact on neighborhood assemblages than interactions among closely related species and could contribute to community structure and diversity maintenance in different forest communities.

show abstract

“…Lastly, we included the MPD, MNTD, ses.MPD, and ses.MNTD metrics of PD because of their history of use in the literature (e.g. Forest et al, 2007;Gonzalez et al, 2010;Fine & Kembel, 2011); MPD measures phylogenetic structure at deep nodes and MNTD at shallow nodes (Webb, 2000).…”

Section: Phylogenetic Diversity Metricsmentioning

confidence: 99%

Untitled

2015

Diversity and Distributions

View full text Add to dashboard Cite

Aim To examine variation in the phylogenetic diversity (PD) of tree communities across geographical and environmental gradients in Amazonia.Location Two hundred and eighty-three c. 1 ha forest inventory plots from across Amazonia.Methods We evaluated PD as the total phylogenetic branch length across species in each plot (PDss), the mean pairwise phylogenetic distance between species (MPD), the mean nearest taxon distance (MNTD) and their equivalents standardized for species richness (ses.PDss, ses.MPD, ses.MNTD). We compared PD of tree communities growing (1) on substrates of varying geological age; and (2) in environments with varying ecophysiological barriers to growth and survival.Results PDss is strongly positively correlated with species richness (SR), whereas MNTD has a negative correlation. Communities on geologically young-and intermediate-aged substrates (western and central Amazonia respectively) have the highest SR, and therefore the highest PDss and the lowest MNTD. We find that the youngest and oldest substrates (the latter on the Brazilian and Guiana Shields) have the highest ses.PDss and ses.MNTD. MPD and ses.MPD are strongly correlated with how evenly taxa are distributed among the three principal angiosperm clades and are both highest in western Amazonia. Meanwhile, seasonally dry tropical forest (SDTF) and forests on white sands have low PD, as evaluated by any metric. Amazonia results from its favourable, easy-to-colonize environment, whereas high values in the Brazilian and Guianan Shields may be due to accumulation of lineages over a longer period of time. White-sand forests and SDTF are dominated by close relatives from fewer lineages, perhaps reflecting ecophysiological barriers that are difficult to surmount evolutionarily. Because MPD and ses.MPD do not reflect lineage diversity per se, we suggest that PDss, ses.PDss and ses.MNTD may be the most useful diversity metrics for setting large-scale conservation priorities.

show abstract

Shifts in species and phylogenetic diversity between sapling and tree communities indicate negative density dependence in a lowland rain forest

Cited by 67 publications

References 79 publications

Demographic drivers of successional changes in phylogenetic structure across life‐history stages in plant communities

Demographic drivers of successional changes in phylogenetic structure across life‐history stages in plant communities

Forest tree neighborhoods are structured more by negative conspecific density dependence than by interactions among closely related species

Untitled

Contact Info

Product

Resources

About