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Cendrine Mony - One of the best experts on this subject based on the ideXlab platform.
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New insights from multidimensional trait space responses to competition in two clonal plant Species
Functional Ecology, 2019Co-Authors: Anne-kristel Bittebière, Hugo Saiz, Cendrine MonyAbstract:1. Trait intraspecific variability determines community dynamics and Species coexistence. In response to competition, plants can display intraspecific variability to enhance their competitive ability or stabilise their niche differences with Competitors. This response is multidimensional because it involves changes along different functional axes and inevitable trade‐offs between traits. Here, we transposed the recent concept of the multidimensional trait space to the analysis of intraspecific plant response to competition. We specifically tested the following: (a) in the absence of Competitors, the plant multidimensional trait space will be packed towards strategies promoting plant colonisation; and (b) with Competitors, the plant multidimensional trait space will be directed towards competition with its size and shaping characteristics dependent on Competitor Species richness.2. We studied trait intraspecific variability of two clonal Species, Brachypodium pinnatum (L.) P. Beauv. and Elytrigia repens (L.) Gould, in response to competition. We analysed plant response in the absence of Competitors and in competition. Competition treatments included intraspecific and interspecific experimental mixtures with increasing Species richness. For each target Species and each treatment, we built an hypervolume based on six traits involved in the three‐dimensional competition (i.e., ramet and connection traits). We measured these hypervolumes for their size, similarity and the contribution of traits in their shaping.3. In the absence of Competitors and for both Species, we demonstrated a multidimensional trait space packing towards a colonisation strategy. Under competition, the multidimensional trait spaces of the two target Species were the widest at the extremes of the richness gradient, that is, intraspecific and interspecific high richness competition treatments. High intraspecific variability either promoted niche differentiation from individuals of similar Species or reflected the large range of competitive responses deployed when plants were faced with many different Competitor identities. The multidimensional response process was based on fine adjustments of various traits depending on the surrounding neighbourhood composition and more specifically, on the Competitor functional similarity with the target Species.4. This study emphasises the multidimensionality of Species competitive response, and also underlines the so far neglected importance of Competitor Species richness for trait intraspecific variability and subsequently community assembly.
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New insights from multidimensional trait space responses to competition in two clonal plant Species
Functional Ecology, 2018Co-Authors: Anne-kristel Bittebière, Hugo Saiz, Cendrine MonyAbstract:Trait intraspecific variability determines community dynamics and Species coexistence. In response to competition, plants can display intraspecific variability to enhance their competitive ability or stabilise their niche differences with Competitors. This response is multidimensional because it involves changes along different functional axes and inevitable trade‐offs between traits. Here, we transposed the recent concept of the multidimensional trait space to the analysis of intraspecific plant response to competition. We specifically tested the following: (a) in the absence of Competitors, the plant multidimensional trait space will be packed towards strategies promoting plant colonisation; and (b) with Competitors, the plant multidimensional trait space will be directed towards competition with its size and shaping characteristics dependent on Competitor Species richness. We studied trait intraspecific variability of two clonal Species, Brachypodium pinnatum (L.) P. Beauv. and Elytrigia repens (L.) Gould, in response to competition. We analysed plant response in the absence of Competitors and in competition. Competition treatments included intraspecific and interspecific experimental mixtures with increasing Species richness. For each target Species and each treatment, we built an hypervolume based on six traits involved in the three‐dimensional competition (i.e., ramet and connection traits). We measured these hypervolumes for their size, similarity and the contribution of traits in their shaping. In the absence of Competitors and for both Species, we demonstrated a multidimensional trait space packing towards a colonisation strategy. Under competition, the multidimensional trait spaces of the two target Species were the widest at the extremes of the richness gradient, that is, intraspecific and interspecific high richness competition treatments. High intraspecific variability either promoted niche differentiation from individuals of similar Species or reflected the large range of competitive responses deployed when plants were faced with many different Competitor identities. The multidimensional response process was based on fine adjustments of various traits depending on the surrounding neighbourhood composition and more specifically, on the Competitor functional similarity with the target Species. This study emphasises the multidimensionality of Species competitive response, and also underlines the so far neglected importance of Competitor Species richness for trait intraspecific variability and subsequently community assembly. A plain language summary is available for this article.
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Morphological response to competition for light in the clonal Trifolium repens (Fabaceae)
American Journal of Botany, 2012Co-Authors: Anne-kristel Bittebière, Nolwenn Renaud, Bernard Clément, Cendrine MonyAbstract:Premise of the study: Plant communities in temperate zones are dominated by clonal plants that can plastically modify their growth characteristics in response to competition. Given that plants compete with one another, and the implications this has for Species coexistence, we conducted a study to assess how clonal Species morphologically respond to competition for light depending on its intensity and heterogeneity, which are determined by the Competitor Species. * Methods: We assessed the morphological response to competition for light of the clonal Species Trifolium repens L. by measuring its growth performance, and vertical and horizontal growth traits. We used five competitive environments, i.e., one without Competitor and four differing by their Competitor Species creating different conditions of competition intensity and heterogeneity. * Key results: The morphological response of Trifolium repens to competition for light depended on the Competitor identity. Competition intensity and heterogeneity, determined by Competitor identity, had an interactive effect on most traits. The increase in petiole elongation and specific leaf area due to increased competition intensity was observed only at low to intermediate competition heterogeneity. Competition heterogeneity promoted the elongation of clone connections allowing space exploration. * Conclusions: Our results demonstrated that the intensity and heterogeneity of competition, which depended on Competitor identity, are of primary importance in determining the plastic response of Trifolium repens . This emphasizes that it is important to consider the fine-scale spatial distribution of individuals when studying their interactions within plant communities.
Daniel Pincheira-donoso - One of the best experts on this subject based on the ideXlab platform.
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The number of Competitor Species is unlinked to sexual dimorphism.
Journal of Animal Ecology, 2014Co-Authors: Shai Meiri, Amy E. Kadison, Maria Novosolov, Panayiotis Pafilis, Johannes Foufopoulos, Yuval Itescu, Pasquale Raia, Daniel Pincheira-donosoAbstract:1. Sexual size dimorphism (SSD) can allow males and females of the same Species to specialize on different sized food items and therefore minimize intraspecific competition. 2. Interspecific competition, however, is thought to limit sexual dimorphism, as larger Competitors in the community will prevent the larger sex from evolving larger size, and smaller Species may prevent the smaller sex from becoming even smaller. 3. We tested this prediction using data on the sexual size dimorphism of lizards, and mammalian carnivores, on islands world-wide. 4. Because insular communities are depauperate, and guilds are Species-poor, it is often assumed that enhanced sexual size dimorphism is common on islands. The intensity of interspecific competition, hindering enhanced dimorphism, is thought to increase with Competitor richness. 5. We tested whether intraspecific sexual size dimorphism of mammalian carnivores and lizards decreases with increasing island Species richness. We further computed the average sexual dimorphism of Species on islands and tested whether Species-rich islands are inhabited by relatively monomorphic Species. Within families and guilds across carnivores and lizards, and with both intraspecific and interspecific approaches, we consistently failed to find support for the notion that Species-poor islands harbour more sexually dimorphic individuals or Species. 6. We conclude that either interspecific competition does not affect the sexual size dimorphism of insular lizards and carnivores (i.e. character displacement and Species sorting are rare in these taxa), or that the number of Species in an assemblage or guild is a poor proxy for the intensity of interspecific competition in insular assemblages.
Anne-kristel Bittebière - One of the best experts on this subject based on the ideXlab platform.
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New insights from multidimensional trait space responses to competition in two clonal plant Species
Functional Ecology, 2019Co-Authors: Anne-kristel Bittebière, Hugo Saiz, Cendrine MonyAbstract:1. Trait intraspecific variability determines community dynamics and Species coexistence. In response to competition, plants can display intraspecific variability to enhance their competitive ability or stabilise their niche differences with Competitors. This response is multidimensional because it involves changes along different functional axes and inevitable trade‐offs between traits. Here, we transposed the recent concept of the multidimensional trait space to the analysis of intraspecific plant response to competition. We specifically tested the following: (a) in the absence of Competitors, the plant multidimensional trait space will be packed towards strategies promoting plant colonisation; and (b) with Competitors, the plant multidimensional trait space will be directed towards competition with its size and shaping characteristics dependent on Competitor Species richness.2. We studied trait intraspecific variability of two clonal Species, Brachypodium pinnatum (L.) P. Beauv. and Elytrigia repens (L.) Gould, in response to competition. We analysed plant response in the absence of Competitors and in competition. Competition treatments included intraspecific and interspecific experimental mixtures with increasing Species richness. For each target Species and each treatment, we built an hypervolume based on six traits involved in the three‐dimensional competition (i.e., ramet and connection traits). We measured these hypervolumes for their size, similarity and the contribution of traits in their shaping.3. In the absence of Competitors and for both Species, we demonstrated a multidimensional trait space packing towards a colonisation strategy. Under competition, the multidimensional trait spaces of the two target Species were the widest at the extremes of the richness gradient, that is, intraspecific and interspecific high richness competition treatments. High intraspecific variability either promoted niche differentiation from individuals of similar Species or reflected the large range of competitive responses deployed when plants were faced with many different Competitor identities. The multidimensional response process was based on fine adjustments of various traits depending on the surrounding neighbourhood composition and more specifically, on the Competitor functional similarity with the target Species.4. This study emphasises the multidimensionality of Species competitive response, and also underlines the so far neglected importance of Competitor Species richness for trait intraspecific variability and subsequently community assembly.
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New insights from multidimensional trait space responses to competition in two clonal plant Species
Functional Ecology, 2018Co-Authors: Anne-kristel Bittebière, Hugo Saiz, Cendrine MonyAbstract:Trait intraspecific variability determines community dynamics and Species coexistence. In response to competition, plants can display intraspecific variability to enhance their competitive ability or stabilise their niche differences with Competitors. This response is multidimensional because it involves changes along different functional axes and inevitable trade‐offs between traits. Here, we transposed the recent concept of the multidimensional trait space to the analysis of intraspecific plant response to competition. We specifically tested the following: (a) in the absence of Competitors, the plant multidimensional trait space will be packed towards strategies promoting plant colonisation; and (b) with Competitors, the plant multidimensional trait space will be directed towards competition with its size and shaping characteristics dependent on Competitor Species richness. We studied trait intraspecific variability of two clonal Species, Brachypodium pinnatum (L.) P. Beauv. and Elytrigia repens (L.) Gould, in response to competition. We analysed plant response in the absence of Competitors and in competition. Competition treatments included intraspecific and interspecific experimental mixtures with increasing Species richness. For each target Species and each treatment, we built an hypervolume based on six traits involved in the three‐dimensional competition (i.e., ramet and connection traits). We measured these hypervolumes for their size, similarity and the contribution of traits in their shaping. In the absence of Competitors and for both Species, we demonstrated a multidimensional trait space packing towards a colonisation strategy. Under competition, the multidimensional trait spaces of the two target Species were the widest at the extremes of the richness gradient, that is, intraspecific and interspecific high richness competition treatments. High intraspecific variability either promoted niche differentiation from individuals of similar Species or reflected the large range of competitive responses deployed when plants were faced with many different Competitor identities. The multidimensional response process was based on fine adjustments of various traits depending on the surrounding neighbourhood composition and more specifically, on the Competitor functional similarity with the target Species. This study emphasises the multidimensionality of Species competitive response, and also underlines the so far neglected importance of Competitor Species richness for trait intraspecific variability and subsequently community assembly. A plain language summary is available for this article.
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Morphological response to competition for light in the clonal Trifolium repens (Fabaceae)
American Journal of Botany, 2012Co-Authors: Anne-kristel Bittebière, Nolwenn Renaud, Bernard Clément, Cendrine MonyAbstract:Premise of the study: Plant communities in temperate zones are dominated by clonal plants that can plastically modify their growth characteristics in response to competition. Given that plants compete with one another, and the implications this has for Species coexistence, we conducted a study to assess how clonal Species morphologically respond to competition for light depending on its intensity and heterogeneity, which are determined by the Competitor Species. * Methods: We assessed the morphological response to competition for light of the clonal Species Trifolium repens L. by measuring its growth performance, and vertical and horizontal growth traits. We used five competitive environments, i.e., one without Competitor and four differing by their Competitor Species creating different conditions of competition intensity and heterogeneity. * Key results: The morphological response of Trifolium repens to competition for light depended on the Competitor identity. Competition intensity and heterogeneity, determined by Competitor identity, had an interactive effect on most traits. The increase in petiole elongation and specific leaf area due to increased competition intensity was observed only at low to intermediate competition heterogeneity. Competition heterogeneity promoted the elongation of clone connections allowing space exploration. * Conclusions: Our results demonstrated that the intensity and heterogeneity of competition, which depended on Competitor identity, are of primary importance in determining the plastic response of Trifolium repens . This emphasizes that it is important to consider the fine-scale spatial distribution of individuals when studying their interactions within plant communities.
Rita Yolanda Cavero - One of the best experts on this subject based on the ideXlab platform.
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Ectomycorrhizae and vascular plants growing in brûlés as indicators of below and above ground microecology of black truffle production areas in Navarra (Northern Spain)
Biodiversity and Conservation, 2010Co-Authors: Begoña González-armada, Ana M. Miguel, Rita Yolanda CaveroAbstract:The diversity below (ectomycorrhizae) and above (vascular flora) ground in brûlés of black truffle production areas have been studied together for the first time, both in plantations and in natural areas, as possible indicators of the microecology of these zones. Studies on the ectomycorrhizal community of mature plantations are scarce. However, monitoring the dynamics of such systems is important to understand the conditions that promote truffle fructification. In the study described here the most frequent ectomycorrhizae are Tuber melanosporum and Quercirrhiza quadratum . In the plantations, Q. quadratum is the most abundant morphotype and in the natural area it is Cenococcum geophilum . The development of truffle ecosystems involves the appearance of Competitor Species with wide networks of hyphae and rhizomorphs. On the other hand, there are few studies concerning the special composition of the vascular flora growing in brûlés . We identified 199 taxa, most of them Mediterranean or Eurosiberian xerophiles and therophytes. This is consistent with the ecology of truffle production areas (dry, sunny and stony). These plants are heavily influenced by the inhibiting substances produced by the truffle and, as a result, they suffer from inhibited growth and in some cases cannot complete their life cycle.
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Ectomycorrhizae and vascular plants growing in brûlés as indicators of below and above ground microecology of black truffle production areas in Navarra (Northern Spain)
Biodiversity and Conservation, 2010Co-Authors: Begoña González-armada, Ana M. Miguel, Rita Yolanda CaveroAbstract:The diversity below (ectomycorrhizae) and above (vascular flora) ground in brules of black truffle production areas have been studied together for the first time, both in plantations and in natural areas, as possible indicators of the microecology of these zones. Studies on the ectomycorrhizal community of mature plantations are scarce. However, monitoring the dynamics of such systems is important to understand the conditions that promote truffle fructification. In the study described here the most frequent ectomycorrhizae are Tuber melanosporum and Quercirrhiza quadratum. In the plantations, Q. quadratum is the most abundant morphotype and in the natural area it is Cenococcum geophilum. The development of truffle ecosystems involves the appearance of Competitor Species with wide networks of hyphae and rhizomorphs. On the other hand, there are few studies concerning the special composition of the vascular flora growing in brules. We identified 199 taxa, most of them Mediterranean or Eurosiberian xerophiles and therophytes. This is consistent with the ecology of truffle production areas (dry, sunny and stony). These plants are heavily influenced by the inhibiting substances produced by the truffle and, as a result, they suffer from inhibited growth and in some cases cannot complete their life cycle.
Begoña González-armada - One of the best experts on this subject based on the ideXlab platform.
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Ectomycorrhizae and vascular plants growing in brûlés as indicators of below and above ground microecology of black truffle production areas in Navarra (Northern Spain)
Biodiversity and Conservation, 2010Co-Authors: Begoña González-armada, Ana M. Miguel, Rita Yolanda CaveroAbstract:The diversity below (ectomycorrhizae) and above (vascular flora) ground in brûlés of black truffle production areas have been studied together for the first time, both in plantations and in natural areas, as possible indicators of the microecology of these zones. Studies on the ectomycorrhizal community of mature plantations are scarce. However, monitoring the dynamics of such systems is important to understand the conditions that promote truffle fructification. In the study described here the most frequent ectomycorrhizae are Tuber melanosporum and Quercirrhiza quadratum . In the plantations, Q. quadratum is the most abundant morphotype and in the natural area it is Cenococcum geophilum . The development of truffle ecosystems involves the appearance of Competitor Species with wide networks of hyphae and rhizomorphs. On the other hand, there are few studies concerning the special composition of the vascular flora growing in brûlés . We identified 199 taxa, most of them Mediterranean or Eurosiberian xerophiles and therophytes. This is consistent with the ecology of truffle production areas (dry, sunny and stony). These plants are heavily influenced by the inhibiting substances produced by the truffle and, as a result, they suffer from inhibited growth and in some cases cannot complete their life cycle.
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Ectomycorrhizae and vascular plants growing in brûlés as indicators of below and above ground microecology of black truffle production areas in Navarra (Northern Spain)
Biodiversity and Conservation, 2010Co-Authors: Begoña González-armada, Ana M. Miguel, Rita Yolanda CaveroAbstract:The diversity below (ectomycorrhizae) and above (vascular flora) ground in brules of black truffle production areas have been studied together for the first time, both in plantations and in natural areas, as possible indicators of the microecology of these zones. Studies on the ectomycorrhizal community of mature plantations are scarce. However, monitoring the dynamics of such systems is important to understand the conditions that promote truffle fructification. In the study described here the most frequent ectomycorrhizae are Tuber melanosporum and Quercirrhiza quadratum. In the plantations, Q. quadratum is the most abundant morphotype and in the natural area it is Cenococcum geophilum. The development of truffle ecosystems involves the appearance of Competitor Species with wide networks of hyphae and rhizomorphs. On the other hand, there are few studies concerning the special composition of the vascular flora growing in brules. We identified 199 taxa, most of them Mediterranean or Eurosiberian xerophiles and therophytes. This is consistent with the ecology of truffle production areas (dry, sunny and stony). These plants are heavily influenced by the inhibiting substances produced by the truffle and, as a result, they suffer from inhibited growth and in some cases cannot complete their life cycle.