Collaborative Research: Influences of Predators, Habitat Structure and Disturbance on Corridor Movement by Stream Fish

合作研究：捕食者、栖息地结构和干扰对溪流鱼廊道运动的影响

• 批准号: 9520469
• 负责人: James Gilliam
• 金额: $ 10.6万
• 依托单位: North Carolina State University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 1995
• 资助国家: 美国
• 起止时间: 1995-10-01 至 1999-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9520469&HistoricalAwards=false
• 关键词: Collaborative; Research; Influences; Predators; Habitat

9520469 Gilliam Human activities have greatly fragmented the landscape, and as a result, critical habitats are often isolated. While it is generally considered desirable to reconnect such isolated habitats by means of corridors, little is known about the movement of animals through corridors. The goal of this study is to investigate the properties of a river corridor that may facilitate or retard the movement of a fish between tributaries. In the study system a predatory fish divided the watershed into two zones: a lower zone in which the predator is common in the river but not adjoining tributaries, and an upper zone in which the predator is absent. The research will test three hypotheses about how the predator, physical structure of the river, and seasonal floods can interact to promote or retard movement of the prey fish along the river corridor connecting tributaries. The hypotheses will be tested by: (1) a large marking experiment with fish in the upper and lower zones of the watershed, in which movement will be followed through wet and dry seasons, (2) a study in an experimental stream facility, on-site, in which predators and physical structure can be manipulated, and (3) a comparative genetic analysis of the populations in the tributaries in the upper and lower zones of the watershed. By focusing on how physical and biological properties of corridors can work to facilitate or retard movement of an organism through a corridor, this project will contribute to our future ability to design realistic corridors reconnecting habitat fragments. Therefore, the research is applicable to conservation of species and management of biodiversity.

9520469 Gilliam 人类活动极大地破坏了景观，因此，重要的栖息地常常被孤立。 虽然人们普遍认为通过走廊重新连接这些孤立的栖息地是可取的，但人们对动物通过走廊的运动知之甚少。 本研究的目的是调查可能促进或阻碍鱼类在支流之间移动的河流走廊的特性。 在研究系统中，掠食性鱼类将流域分为两个区域：较低的区域，捕食者在河流中常见，但在邻近的支流中不常见；较高的区域，捕食者不存在。 该研究将测试三个假设，即捕食者、河流的物理结构和季节性洪水如何相互作用，以促进或阻碍被捕食鱼沿着连接支流的河流走廊的运动。 这些假设将通过以下方式进行检验：（1）对流域上部和下部区域的鱼类进行大型标记实验，其中将跟踪湿季和旱季的运动情况，（2）在现场实验溪流设施中进行研究，其中可以操纵捕食者和物理结构，以及（3）对流域上部和下部区域的支流种群进行比较遗传分析。 通过关注走廊的物理和生物特性如何促进或阻碍生物体通过走廊的运动，该项目将有助于我们未来设计重新连接栖息地碎片的真实走廊的能力。 因此，该研究适用于物种保护和生物多样性管理。