Habitat heterogeneity and intraguild interactions modify distribution and injury rates in two coexisting genera of damselflies
Freshwater Biology
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Abstract
1. Sublethal effects of predation can affect both population and community structure. Despite this, little is known about how the frequency of injury varies in relation to habitat, aquatic community characteristics or between trophically similar, coexisting taxa.
2. In a tidal freshwater ecosystem, we first examined injuries (lamellar autotomy) of Enallagma and Ischnura damselfly larvae, which have unique behaviours and susceptibilities to predation, as a function of habitat type, body size and overall odonate density. We also examined relative abundance of these genera and potential anisopteran predators as a function of habitat type.
3. The frequency of injury to Enallagma was high when larvae were small and overall odonate density was high. For Ischnura, however, the frequency of injury depended on habitat and was high for small larvae in less disturbed habitats low on the shore. Ischnura were most frequently found in more disturbed habitats high on the shore, whereas Enallagma were more frequently found in less disturbed habitats low on the shore.
4. The relative importance of factors hypothesised to structure odonate communities varied between coexisting Enallagma and Ischnura. Distinctive distributions and patterns of injury for each genus provided new insights on the potential for intraguild interactions to modify habitat associations in tidal freshwater ecosystems.
Suggested Citation
Witt, J., Forkner, R.E., Kraus, R.T., 2013, Habitat heterogeneity and intraguild interactions modify distribution and injury rates in two coexisting genera of damselflies: Freshwater Biology, v. 58, no. 11, p. 2380-2388, https://doi.org/10.1111/fwb.12217.
Study Area
| Publication type | Article |
|---|---|
| Publication Subtype | Journal Article |
| Title | Habitat heterogeneity and intraguild interactions modify distribution and injury rates in two coexisting genera of damselflies |
| Series title | Freshwater Biology |
| DOI | 10.1111/fwb.12217 |
| Volume | 58 |
| Issue | 11 |
| Publication Date | August 19, 2013 |
| Year Published | 2013 |
| Language | English |
| Publisher | Wiley |
| Contributing office(s) | Great Lakes Science Center |
| Description | 9 p. |
| Larger Work Type | Article |
| Larger Work Subtype | Journal Article |
| Larger Work Title | Freshwater Biology |
| First page | 2380 |
| Last page | 2388 |
| Country | United States |
| State | Virginia |
| Other Geospatial | Thompson Creek |