Fine-Scale Habitat Characteristics Related to Occupancy of the Yosemite Toad,Anaxyrus canorus
| Autor: | Julie J. Nelson-Paul, Christina T. Liang, Robert L. Grasso, Amy J. Lind, Kim Vincent |
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| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
education.field_of_study Detritus 010504 meteorology & atmospheric sciences Occupancy Ecology Rare species Population Aquatic Science 010603 evolutionary biology 01 natural sciences Habitat Threatened species Environmental science Animal Science and Zoology Precipitation education Surface water Ecology Evolution Behavior and Systematics 0105 earth and related environmental sciences |
| Zdroj: | Copeia. 105:120-127 |
| ISSN: | 1938-5110 0045-8511 |
| DOI: | 10.1643/ch-15-290 |
| Popis: | Fine-scale habitat information can provide insight into species occupancy and persistence that is not apparent at the landscape-scale. Such information is particularly important for rare species that are experiencing population declines, such as the threatened Yosemite Toad (Anaxyrus canorus). Our study examined differences in physical characteristics of occupied and unoccupied toad breeding pools within meadows, and then used a logistic regression model to evaluate if occupancy was related to the physical microhabitat variables. We found that occupied pools on average were deeper by 0.7 cm, warmer by 3°C, and had 50% more surface water along the short axis of the pool. Mean water depth, mean water temperature, the amount of surface water in the pools, mean detritus depth, and mean vegetation height were significant predictors of toad occupancy. Despite variation in larger-scale environmental conditions such as yearly winter snow cover and precipitation, occupancy was not related to individual years and m... |
| Databáze: | OpenAIRE |
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