Mechanisms driving plant functional trait variation in a tropical forest

Hofhansl, Florian; Chacón‐Madrigal, Eduardo; Brännström, Åke; Dieckmann, Ulf; Franklin, Oskar

doi:10.1002/ece3.7256

Cited by 25 publications

(15 citation statements)

References 46 publications

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“…ITV arises because of genetic variation among individuals, the environment, and the interaction between the two (Siefert et al 2015, Bolnick et al 2011. A portion of ITV is due to the environment; thus, properly accounting for ITV across quanti ed environmental gradients can reveal trait-environment relationships (Bruelheide et al 2018, Craven et al 2018, Hofhansl et al 2021. Moreover, slight differences in functional trait values have been reported for tree ontogenetic stages (i.e., canopy-dwelling adult trees >10 cm dbh vs. smaller trees <10 cm dbh, Spasojevic et al 2014).…”

Section: Introductionmentioning

confidence: 99%

Intraspecific trait variation and species turnover in successional tropical forests: assessing trait imputation for community-weighted means

Hogan

Baraloto

2023

Plant Ecol

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Accounting for intraspeci c trait variation (ITV) is crucial to plant ecology for vegetation modeling efforts. ITV can be substantial; however, it remains unclear how ITV in uences community-weighted mean (CWM) trait estimates. We use leaf and root trait data from 423 trees of 72 species from 15 Angiosperm families in combination with community data from 164 25×25m plots comprising 580 species to evaluate the contributions of ITV and compositional turnover to CWMs, comparing unlogged primary tropical forest to selectively-logged and clear-cut secondary tropical forest. We also examine the effect of imputing missing trait values using phylogenetic generalized linear modeling (PhyloPars) on CWMs. For six of the seven traits, ITV negatively covaried with community compositional turnover to generate larger CWM differences between forest types than observed if ITV was not integrated. For example, plot average weighted mean speci c leaf area was 10.7 and 10.4 m 2 kg -1 for primary and secondary forests, not accounting for ITV, but shifted to 9.8 and 11.1 m 2 kg -1 after doing so. Our results from 72-species assemblages were largely consistent with results using phylogenetically-imputed traits for the entire community. The contribution of ITV to CWMs ranged from 25 to 75%, with nearly all trait variation due to forest type attributable to ITV. CWM trait estimates became more conservative with forest age, whereas ITV for many traits showed an opposing acquisitive shift (i.e., increasing in leaf area or root length), and because of negative covariation between ITV and species turnover, forest age-related weighted-mean trait differences increased.

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Section: Introductionmentioning

confidence: 99%

Intraspecific trait variation and species turnover in successional tropical forests: assessing trait imputation for community-weighted means

Hogan

Baraloto

2023

Plant Ecol

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“…Nevertheless, the exploration of functional diversity patterns of evergreen and deciduous plants along geographical and environmental gradients based on multiple traits is still lacking. Moreover, large-scale functional trait patterns using species occurrence data failed to reveal functional assembly operating at local scales (Hofhansl et al, 2021), while local-scale studies assessing variation in species abundance and their functional traits were mostly conducted in a single region or based on a single trait (Pinho et al, 2021). Scaling up analyses of local communities to biogeographic scales can reveal ecological processes that drive species abundance and the functional assemblages, as well as demonstrate the functional assembly of species along biogeographic and environmental gradients (Poorter et al, 2018).…”

Section: Introductionmentioning

confidence: 99%

Environmental correlates of tree functional diversity with different leaf habits across subtropical evergreen broadleaved forests

Huang

Zang

2023

J Vegetation Science

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Aim: Evergreen and deciduous broadleaved plants have long been considered as different strategies to cope with environmental conditions, which are closely related to the trait syndromes associated with leaf habits. However, there are no assessments of differences in functional diversity among evergreen and deciduous species over a regional scale.Location: Subtropical evergreen broadleaved forest (SEBLF) of China. Methods:We measured seven functional traits of 292 woody plant species in 250 forest plots across five locations in the SEBLF. We quantified functional richness (F Ric ), functional divergence (F Div ), and functional evenness (F Eve ) for evergreen vs deciduous species separately. We compared the patterns of variation of functional diversity for different leaf habits along geographical (latitude, longitude and elevation) and environmental (climate and soil) gradients.Results: Functional richness of evergreen species was higher than that of deciduous species, while F Div and F Eve were lower. F Ric of evergreen species decreased while F Div increased with increasing elevation. For deciduous species, F Ric and F Div decreased with increasing latitude. With the increase of longitude, only F Div of evergreen species decreased. F Eve of both leaf habits did not exhibit geographical patterns. Environmental variables explained 9%-38% and 4%-33% of the variation in functional diversity of evergreen and deciduous species respectively. The temperature range was the most important factor affecting F Ric and F Div of evergreen species, while F Ric of deciduous species was mainly affected by precipitation of the driest quarter. F Eve of both leaf habits was mostly affected by soil conditions.Main conclusions: Functional diversity of subtropical forests in China revealed different geographical patterns across leaf habits. The functional diversity of evergreen species was mainly linked to temperature, while the deciduous species were driven by precipitation. Our study demonstrated that different functional diversity patterns of evergreen and deciduous broadleaved plants in response to environment can result in the coexistence of the two leaf habit types.

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“…Despite this, there is substantial functional redundancy among plant taxa (i.e., within communities, Pillar et al 2013) and considerable intraspeci c trait variation (ITV, Siefert et al 2015) that muddles trends, for example weakening trait-demography relationships (Poorter et al 2018a, Yang et al 2018. A portion of ITV is due to the environment; thus, properly accounting for ITV across quanti ed environmental gradients can reveal trait-environment relationships (Bruelheide et al 2018, Craven et al 2018, Hofhansl et al 2021.…”

Section: Introductionmentioning

confidence: 99%

Intraspecific trait variation and species functional turnover in successional tropical forests: assessing trait imputation for community weighted means

Hogan

Baraloto

2022

Preprint

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Accounting for intraspecific trait variation (ITV) is central to plant ecology and crucial for vegetation modeling efforts. ITV can be substantial; however, it remains unclear how ITV influences community-weighted mean (CWM) trait estimates. We use leaf and root trait data from 423 trees of 72 species from 15 Angiosperm families in combination with community data from 164 25×25m plots comprising 580 species to evaluate the contribution of ITV to CWMs, comparing unlogged primary tropical forest to selectively-logged and clear-cut secondary tropical forest. We examine the effect of gap-filling missing trait values using phylogenetic generalized linear modeling (PhyloPars) on CWMs. For six of the seven traits, ITV negatively covaried with species turnover to generate larger CWM differences between forest types than observed if ITV was not integrated. For example, plot average assemblage-weighted mean specific leaf area was 10.7 and 10.4 m2 kg-1 for primary and secondary forests, not accounting for ITV, but shifted to 9.8 and 11.1 m2 kg-1 after doing so. Our results from 72-species assemblages were largely consistent with results using phylogenetically-imputed traits for the entire community. The contribution of ITV to CWMs ranged from 25 to 75%, with nearly all trait variation due to forest type attributable to ITV. CWM trait estimates became more conservative with forest age, whereas ITV for many traits showed an acquisitive shift (i.e., increasing in leaf area or root length), and because of negative covariation between ITV and species turnover, forest age-related CWM differences increased.

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Mechanisms driving plant functional trait variation in a tropical forest

Abstract: This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.

Cited by 25 publications

References 46 publications

Intraspecific trait variation and species turnover in successional tropical forests: assessing trait imputation for community-weighted means

Intraspecific trait variation and species turnover in successional tropical forests: assessing trait imputation for community-weighted means

Environmental correlates of tree functional diversity with different leaf habits across subtropical evergreen broadleaved forests

Intraspecific trait variation and species functional turnover in successional tropical forests: assessing trait imputation for community weighted means

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