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117 results for “competitive interactions”
Metabolic phenotype mediates the outcome of competitive interactions in a response-surface field experiment
<p>Competition and metabolism should be linked. Intraspecific variation in metabolic rates and, hence, resource demands covary with competitive ability. The effects of metabolism on conspecific interactions, however, have mostly been studied under laboratory conditions.<b> </b>We used a trait-specific response-surface design to test for the effects of metabolism on pairwise interactions of the marine colonial invertebrate, <i>Bugula neritina</i> in the field. Specifically, we compared the performance (survival, growth, and reproduction) of focal individuals, both in the presence and absence of a neighbour colony, both of which had their metabolic phenotype characterised.<b> </b>Survival of focal colonies depended on the metabolic phenotype of the neighbouring individual, and on the combination of both the focal and neighbour colony metabolic phenotypes that were present. Surprisingly, we found pervasive effects of neighbour metabolic phenotypes on focal colony growth and reproduction, though the sign and strength of these effects showed strong microenvironmental variability.<b> </b>Overall, we find that the metabolic phenotype changes the strength of competitive interactions, but these effects are highly contingent on local conditions. We suggest future studies explore how variation in metabolic rate affects organisms beyond the focal organism alone, particularly under field conditions.</p>
FIG. 5 in Competitive Interactions between Cricket Frogs (Acris blanchardi) and Other Anurans
FIG. 5.—Mean (±1 SE) Cricket Frog mass and time to metamorphosis in Experiment 2 by assemblage type. The CF 20, CF 30, and CF 60 indicate the low, medium, and high-density Cricket Frog controls; CF + TF indicates the assemblage with both Cricket Frogs and Treefrogs; CF + GF indicates the assemblage with both Cricket Frogs and Green Frogs; All Spp indicates the three-species assemblage.
FIG. 4 in Competitive Interactions between Cricket Frogs (Acris blanchardi) and Other Anurans
FIG. 4.—Mean (±1 SE) Cricket Frog (CF) survival from Experiment 2. Filled circles are mean Treefrog survival; Filled squares are mean Green Frog survival. The CF 20, CF 30, and CF 60 indicate the low, medium, and highdensity Cricket Frog controls; CF + TF indicates the assemblage with both Cricket Frogs and Treefrogs; CF + GF indicates the assemblage with both Cricket Frogs and Green Frogs; All Spp indicates the three-species assemblage. *Indicates Cricket Frog survival in CF + GF assemblage was less than in the CF + TF assemblage.
FIG. 3 in Competitive Interactions between Cricket Frogs (Acris blanchardi) and Other Anurans
FIG. 3.—(A) Mean (±1 SE) relative levels of periphyton in Experiment 1 in Cricket Frog (CF) and Bullfrog (BF) assemblages. Both CF 30 and BF 30 indicate low-density, single-species controls; CF 60 and BF 60 indicate highdensity, single-species controls; CF + BF indicates the two-species assemblage. (B) Mean relative levels of periphyton in Experiment 2. The CF 20, CF 30, and CF 60 indicate the low, medium, and high-density Cricket Frog controls; CF + TF indicates the assemblage with both Cricket Frogs and Treefrogs; CF + GF indicates the assemblage with both Cricket Frogs and Green Frogs; All Spp indicates the three-species assemblage.
FIG. 2 in Competitive Interactions between Cricket Frogs (Acris blanchardi) and Other Anurans
FIG. 2.—(A) Mean (±1 SE) growth of Cricket Frogs (CF) and (B) mean growth of Bullfrogs (BF) in Experiment 1. Both CF 30 and BF 30 indicate low-density, single-species controls; CF 60 and BF 60 indicate high-density, single-species controls; CF + BF indicates the two-species assemblage; OWBF indicates the presence of two overwintered bullfrog tadpoles.
FIG. 1 in Competitive Interactions between Cricket Frogs (Acris blanchardi) and Other Anurans
FIG. 1.—(A) Mean (±1 SE) Cricket Frog (CF) survival to metamorphosis and (B) mean Bullfrog (BF) survival to end of the experiment in Experiment 1. Both CF 30 and BF 30 indicate low-density, single-species controls; CF 60 and BF 60 indicate high-density, single-species controls; CF + BF indicates the two-species assemblage.
Data from: Plant genetics and interspecific competitive interactions determine ectomycorrhizal fungal community responses to climate change
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Data from: Does competitive interaction drive species recognition in a house mouse secondary contact zone?
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The effect of inter-and intraspecific competition on individual and population niche widths – a four-decade study on two interacting salmonids
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Data from: An enemy's enemy is an ally: Competitive indirect interactions mediate coexistence of trees, grasses, and subshrubs in Neotropical Savanna
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Data from: Genotype-by-environment interactions for seminal fluid expression and sperm competitive ability
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Data from: Asymmetric competitive effects during species range expansion: an experimental assessment of interaction strength between ‘equivalent’ grazer species at their range overlap
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Data from: Food and habitat provisions jointly determine competitive and facilitative interactions among distantly related herbivores
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Data from: The interactive effects of competition and predation risk on dispersal in an insect.
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Data from: Foraging modality and plasticity in foraging traits determine the strength of competitive interactions among carnivorous plants, spiders, and toads
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The effects of novel leaf litter deposition on competitive, predator–prey and host–parasite interactions of American toad larvae
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Data from: Interspecific interactions through 2 million years: are competitive outcomes predictable?
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Data from: Consumer interaction strength may limit the diversifying effect of intraspecific competition: a test in alewife (Alosa pseudoharengus).
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Changes in temperature alter competitive interactions and overall structure of fig wasp communities
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Metabolic phenotype mediates the outcome of competitive interactions in a response-surface field experiment
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