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Quantifying disturbance resistance in an ecologically dominant species: a robust design analysis
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Quantifying disturbance resistance in an ecologically dominant species: a robust design analysis
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Quantifying disturbance resistance in an ecologically dominant species: a robust design analysis
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Journal Article
Quantifying disturbance resistance in an ecologically dominant species: a robust design analysis
2011
Overview
Disturbance is now recognized as a key ecosystem process but few studies have examined its indirect effects on individuals in a population or its relationship to ecological dominance in a community. Using an ecologically dominant small mammal population in experimentally burned habitat as a model, I empirically tested the effect of disturbance on survival, abundance and fecundity and investigated whether recently burned habitat is a population sink. I also examined the effect of fire on community diversity, particularly how fire influenced dominance by bushveld gerbils Tatera leucogaster (Peters 1852). Live trapping in the first year post-fire yielded a total of 4,774 captures of 1,076 individual bushveld gerbils in a tropical savanna in southern Africa. The robust design allowed for an investigation of the effects of fire, sex and temporal variation on survival while controlling for potential differences in detection and temporary emigration. Although there were fewer individuals in burned savanna during the first 6 months post-fire, their apparent monthly survival was not significantly lowered compared with the control, with males and females surviving equally well. Fecundity, represented by proportion of females lactating, was unaffected by fire and, overall, recently burned habitat does not appear to be sink habitat. The disturbance resistance exhibited by this species is likely a contributing factor to its ecological dominance in the area, which is subject to relatively frequent fires. Results of this study highlight the need to consider disturbance regimes when evaluating patterns of species richness and evenness in an ecosystem.
Publisher
Springer,Springer-Verlag,Springer Nature B.V
Subject
/ Analysis
/ Animal, plant and microbial ecology
/ Animals
/ Biological and medical sciences
/ Biomedical and Life Sciences
/ Botswana
/ Ecology
/ Female
/ Fires
/ Fundamental and applied biological sciences. Psychology
/ Gerbils
/ Habitat
/ Habitats
/ Male
/ Mammals
/ Population ecology - Original Paper
/ Sex
/ Species
/ Survival
/ Trapping
