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| DOI | 10.1002/ecy.4217 |
| Individual growth rates and size at metamorphosis increase with watershed area in a stream salamander | |
| 发表日期 | 2024 |
| ISSN | 0012-9658 |
| EISSN | 1939-9170 |
| 起始页码 | 105 |
| 结束页码 | 2 |
| 卷号 | 105期号:2 |
| 英文摘要 | A fundamental goal of ecology is to understand how the physical environment influences intraspecific variability in life history and, consequently, fitness. In streams, discharge and associated habitat conditions change along a continuum from intermittency to permanence: Headwater streams typically have smaller watersheds and are thus more prone to drying than higher-order streams with larger watersheds and more consistent discharge. However, few empirical studies have assessed life history and associated population responses to this continuum in aquatic organisms. We tested the prediction that individual growth, rate of development, and population growth increase with watershed area in the long-lived stream salamander Gyrinophilus porphyriticus, where we use watershed area as a proxy for hydrologic intermittence. To address this hypothesis, we used 8 years of mark-recapture data from 53 reaches across 10 headwater streams in New Hampshire, USA. Individual growth rates and mean size at metamorphosis increased with watershed area for watersheds from 0.12 to 1.66 km2. Population growth rates increased with watershed area; however, this result was not statistically significant at our sample size. Mean age of metamorphosis did not vary across watershed areas. Lower individual growth rates and smaller sizes at metamorphosis likely contributed to reduced lifetime fecundity and population growth in reaches with the smallest watershed areas and highest vulnerability to drought. These responses suggest that as droughts increase due to climate change, headwater specialists in hydrologically intermittent environments will experience a reduction in fitness due to smaller body sizes or other growth-related mechanisms. |
| 英文关键词 | amphibian; development; discharge; Gyrinophilus porphyriticus; hydrologic intermittency; lambda; metamorphosis |
| 语种 | 英语 |
| WOS研究方向 | Environmental Sciences & Ecology |
| WOS类目 | Ecology |
| WOS记录号 | WOS:001134403000001 |
| 来源期刊 | ECOLOGY
 |
| 文献类型 | 期刊论文 |
| 条目标识符 | http://gcip.llas.ac.cn/handle/2XKMVOVA/297815 |
| 作者单位 | University of Montana System; University of Montana; Montana State University System; Montana State University Bozeman |
| 推荐引用方式 GB/T 7714 | . Individual growth rates and size at metamorphosis increase with watershed area in a stream salamander[J],2024,105(2). |
| APA | (2024).Individual growth rates and size at metamorphosis increase with watershed area in a stream salamander.ECOLOGY,105(2). |
| MLA | "Individual growth rates and size at metamorphosis increase with watershed area in a stream salamander".ECOLOGY 105.2(2024). |
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