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Morphological traits: predictable responses to macrohabitats across a 300 km scale
Michelle L Yates1, Nigel R Andrew1, Matthew Binns1
1Centre for Behavioural and Physiological Ecology, Zoology, University of New England , Armidale, NSW , Australia.
Peerj
|April 2, 2014
Summary
Morphological traits of ant assemblages predict responses to macrohabitats, aiding predictions of species turnover. This large-scale study found coarse environmental differences filter species, not fine-scale habitat variations.
Area of Science:
- Ecology
- Evolutionary Biology
- Zoology
Background:
- Species traits can predict community changes in response to environmental shifts.
- Understanding trait-environment associations is crucial for predicting biodiversity responses to global change.
Purpose of the Study:
- To investigate if morphological traits of ant assemblages predictably respond to macrohabitats across a large geographic scale.
- To determine if trait responses are influenced by macrohabitat, microhabitat, or phylogeny.
Main Methods:
- Collected ant assemblages from paired pasture and remnant sites across three areas.
- Measured ten functional morphological traits for individuals of each species.
- Utilized a fourth-corner model to test associations between traits, microhabitats, and macrohabitats, assessing phylogenetic independence.
Main Results:
- Nine of ten morphological traits were significantly predicted by macrohabitat (pastures vs. remnants).
- Most trait-macrohabitat associations were independent of phylogeny, suggesting morphological filtering.
- Microhabitat variables showed no association with morphological traits, contrary to some previous studies.
- Specific traits related to locomotion, feeding, and sensory abilities differed between pastures and remnants.
Conclusions:
- Macrohabitat strongly filters species based on their morphological traits across large scales.
- Fine-scale habitat filtering of morphological traits was not evident in this study.
- Morphological traits show potential for predicting species assemblage responses to environmental change, especially for poorly understood taxa.
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