The return of the variance: intraspecific variability in community ecology

Violle, Cyrille; Enquist, Brian J.; McGill, Brian J.; Jiang, Lin; Albert, Cécile H.; Hulshof, Catherine M.; Jung, Vincent; Messier, Julie

doi:10.1016/j.tree.2011.11.014

Cited by 1,400 publications

(1,761 citation statements)

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“…Building on MacArthur and Levins' (1967) findings that the relative importance of intra‐ and interspecific phenotypic variation is a key parameter of species coexistence, these variance ratios test for internal and environmental filtering of a given community at different spatial and organizational scales (e.g., individual, species, whole community) (Violle et al. 2012). For each community (plot), we calculated three T ‐statistics values (Violle et al.…”

Section: Methodsmentioning

confidence: 99%

“…For each community (plot), we calculated three T ‐statistics values (Violle et al. 2012) using the cati R package (function Tstats in cati). If A and B are two different levels of inclusiveness (i: individual, p: population, c: community, r: region) and

σ_{A B}^{2}

is the variation of A within B , then:…”

Section: Methodsmentioning

confidence: 99%

“…We then explore patterns of intra‐ to interspecific variation in LMA ( T ‐statistics, Violle et al. 2012; Taudiere and Violle 2015) to evaluate broad hypotheses related to differing community assembly filters across these gradients. Despite the recognition that intraspecific variation is a key parameter in explaining a population's resilience to environmental changes and its ability to coexist and compete with its neighbors (Albert et al.…”

Section: Introductionmentioning

confidence: 99%

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Examining variation in the leaf mass per area of dominant species across two contrasting tropical gradients in light of community assembly

Neyret

Bentley

Oliveras

et al. 2016

Ecology and Evolution

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Understanding variation in key functional traits across gradients in high diversity systems and the ecology of community changes along gradients in these systems is crucial in light of conservation and climate change. We examined inter‐ and intraspecific variation in leaf mass per area (LMA) of sun and shade leaves along a 3330‐m elevation gradient in Peru, and in sun leaves across a forest–savanna vegetation gradient in Brazil. We also compared LMA variance ratios (T‐statistics metrics) to null models to explore internal (i.e., abiotic) and environmental filtering on community structure along the gradients. Community‐weighted LMA increased with decreasing forest cover in Brazil, likely due to increased light availability and water stress, and increased with elevation in Peru, consistent with the leaf economic spectrum strategy expected in colder, less productive environments. A very high species turnover was observed along both environmental gradients, and consequently, the first source of variation in LMA was species turnover. Variation in LMA at the genus or family levels was greater in Peru than in Brazil. Using dominant trees to examine possible filters on community assembly, we found that in Brazil, internal filtering was strongest in the forest, while environmental filtering was observed in the dry savanna. In Peru, internal filtering was observed along 80% of the gradient, perhaps due to variation in taxa or interspecific competition. Environmental filtering was observed at cloud zone edges and in lowlands, possibly due to water and nutrient availability, respectively. These results related to variation in LMA indicate that biodiversity in species rich tropical assemblages may be structured by differential niche‐based processes. In the future, specific mechanisms generating these patterns of variation in leaf functional traits across tropical environmental gradients should be explored.

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Section: Methodsmentioning

confidence: 99%

σ_{A B}^{2}

is the variation of A within B , then:…”

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Examining variation in the leaf mass per area of dominant species across two contrasting tropical gradients in light of community assembly

Neyret

Bentley

Oliveras

et al. 2016

Ecology and Evolution

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“…Functional traits can be assessed at different levels of biological resolution, from functional groups (e.g., legumes) to species-level means (e.g., average N 2 -fixation rate), to, at the finest scale, intraspecific variation (e.g., individual N 2 -fixation rates). The appropriate scale of analysis depends on the importance of individual variability for the ecosystem process of interest [7,8].…”

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confidence: 99%

Functional traits in agriculture: agrobiodiversity and ecosystem services

Wood

Karp

DeClerck

et al. 2015

Trends in Ecology & Evolution

309

240

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“…On the other hand, intraspecific morphological variations of some species also seem to have a key role in their occupation and survival over time in a particular habitat type (Violle et al, 2012). Considering the ecomorphological paradigm, intraspecific morphological variations can result in subtle niche differences among the individuals, favoring the adaptation of some fish species according to changes in environmental conditions.…”

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confidence: 99%

Intraspecific ecomorphological variations in Poecilia reticulata (Actinopterygii, Cyprinodontiformes): comparing populations of distinct environments

Mise

Souza

Pagotto

et al. 2015

Iheringia, Sér. Zool.

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ABSTRACT. Morphological variations, according to the principles of ecomorphology, can be related to different aspects of the organism way of life, such as occupation of habitats and feeding behavior. The present study sought to examine the intraspecific variation in two populations of Poecilia reticulata Peters, 1859, that occur in two types of environments, a lotic (Maringá Stream) and a lentic (Jaboti Lake). Due to a marked sexual dimorphism, males and females were analyzed separately. Thus, the proposed hypotheses were that the populations that occur in distinct environments present morphological differences. The morphological variables were obtained using morphometric measurements and the ecomorphological indexes. The data were summarized in a Principal Component Analysis (PCA). A Multivariate Analysis of Variance (Manova) was made to verify significant differences in morphology between the populations. Males and females showed similar ecomorphological patterns according to the environment they occur. In general the population from Maringá Stream had fins with major areas, and the Jaboti Lake population eyes located more dorsally. Additionally, others morphological differences such as wider mouth of the males from Maringá Stream, wider heads on Jaboti Lake females and more protractible mouths on males from Jaboti Lake suggest a set of environmental variables that can possibly influence the ecomorphological patterns of the populations, as the water current, availability of food resources and predation. In summary, the initial hypotheses could be confirmed, evidencing the occurrence of distinct ecomorphotypes in the same species according to the environment type.KEYWORDS. Ecomorphological indexes, Poeciliidae, habitat occupation, ecomorphotypes. RESUMO. Variações ecomorfológicas intraespecíficas emPoecilia reticulata (Actinopterygii, Cyprinodontiformes): comparando populações de ambientes distintos. Variações morfológicas, de acordo com os princípios da ecomorfologia, podem ser relacionadas a diferentes aspectos do modo de vida dos organismos, como a ocupação de hábitats e comportamento alimentar. O presente estudo buscou analisar essas variações em nível intraespecífico em duas populações de Poecilia reticulata Peters, 1859, que ocorrem em dois tipos de ambientes, um lótico (ribeirão Maringá) e um lêntico (lago Jaboti). Por apresentar um acentuado dimorfismo sexual machos e fêmeas foram analisados separadamente. Assim, a hipótese proposta foi de que as populações, que ocorrem em ambientes distintos, possuem diferenças morfológicas. As variáveis morfológicas foram obtidas por meio de medidas morfométricas e índices ecomorfológicos. Os dados foram sumarizados em uma Análise de Componentes Principais. Também foi feita uma Análise de Variância Multivariada para verificar se existe diferença significativa na morfologia entre as populações. Machos e fêmeas mostraram padrões ecomorfológicos semelhantes de acordo com o ambiente em que ocorrem. No geral, a população do ribeirão Maringá apresentou nadadeiras com maiore...

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The return of the variance: intraspecific variability in community ecology

Cited by 1,400 publications

References 88 publications

Examining variation in the leaf mass per area of dominant species across two contrasting tropical gradients in light of community assembly

Examining variation in the leaf mass per area of dominant species across two contrasting tropical gradients in light of community assembly

Functional traits in agriculture: agrobiodiversity and ecosystem services

Intraspecific ecomorphological variations in Poecilia reticulata (Actinopterygii, Cyprinodontiformes): comparing populations of distinct environments

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