Knowledge Resource Center for Ecological Environment in Arid Area
| 项目编号 | 0807413 |
| DISSERTATION RESEARCH: Ecological Role of Fish in Southwestern Streams | |
| Alexander Flecker | |
| 主持机构 | Cornell Univ - State: AWDS MADE PRIOR MAY 2010 |
| 开始日期 | 2008-06-01 |
| 结束日期 | 2010-05-31 |
| 资助经费 | 11936(USD) |
| 项目类别 | Standard Grant |
| 资助机构 | US-NSF（美国国家科学基金会） |
| 项目所属计划 | ECOSYSTEM STUDIES |
| 语种 | 英语 |
| 国家 | 美国 |
| 英文简介 | A species with a strong influence in one ecological community may have a limited influence under other environmental conditions, but the factors determining the strength of species interactions are often unclear. Fish control important characteristics of many stream systems. Native fishes of the American southwest are ideal for testing the influence of abiotic and biotic factors on species interactions because single species are broadly distributed throughout a heterogeneous landscape of hot deserts and cool mountains. Native fishes are declining in these streams; thus, understanding the effects of their loss is vital. To assess how environmental context affects species interactions in Southwestern streams, this study will investigate the influence of two related, but functionally different fish species, Catostomus insignis and Catostomus clarki, on ecosystem processes along an elevational gradient. This gradient will enable examination of the effects of these species on critical stream processes such as primary production and organic matter generation under conditions ranging from warm water, low desert streams to cool water, high mountain streams. Using large-scale enclosures controlling fish identity in a single stream combined with small-scale fish exclosures in multiple streams, this study will estimate the effects of fish on ecosystem properties, and assess how environmental context modifies them. The project also will track fish habitat use to understand if effects on ecosystem processes are heterogeneous within the stream. Understanding the factors modifying species importance in ecosystems will provide information particularly valuable for management agencies, which must develop sustainable practices to use and protect these ecological resources. |
| 来源学科分类 | Biological Sciences |
| URL | https://www.nsf.gov/awardsearch/showAward?AWD_ID=0807413 |
| 资源类型 | 项目 |
| 条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/341406 |
| 推荐引用方式 GB/T 7714 | Alexander Flecker.DISSERTATION RESEARCH: Ecological Role of Fish in Southwestern Streams.2008. |
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