SGER: Assessing the Ecological Consequences of Amphibian Declines: Emergency Sampling Along a Moving Disease Front in Panamá

SGER：评估两栖动物减少的生态后果：沿巴拿马移动疾病前沿进行紧急采样

• 批准号: 0645875
• 负责人: Matt Whiles
• 金额: --
• 依托单位: Southern Illinois University at Carbondale
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2006
• 资助国家: 美国
• 起止时间: 2006-09-15 至 2008-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0645875&HistoricalAwards=false
• 关键词: SGER; Assessing; Ecological; Consequences; Amphibian

Amphibians represent a significant component of terrestrial and freshwater biodiversity and an energetic link between aquatic and terrestrial habitats, particularly in the tropics where amphibian diversity and abundance are very high. However, amphibians have declined dramatically around the world, including catastrophic losses in 13 Latin American countries in the last 20 years, with no indication of recovery. This research examines the ecological consequences of disease-driven amphibian declines by investigating how losses alter food webs, energy flow, and nutrient cycling in streams and energy exchanges between streams and terrestrial habitats. This will be accomplished through continued intensive monitoring of ecosystem structure and function in Panamanian streams that experienced a massive decline in 2005. In addition, a stable isotope tracer addition will be used to model nitrogen cycling in a stream that currently has abundant amphibians but is directly in the path of the disease. Disease-driven amphibian declines represent catastrophic losses of biodiversity. Studies to date in these systems suggest that amphibian declines have large-scale effects on streams, including changes in stream and riparian food web structure, changes in algal communities and production, altered quality of transported organic materials, and reduced energy transfers from streams to terrestrial habitats.

两栖动物是陆地和淡水生物多样性的重要组成部分，是水生和陆地生境之间的有力联系，特别是在两栖动物多样性和丰富度非常高的热带地区。 然而，两栖动物在世界各地急剧减少，包括过去20年在13个拉丁美洲国家的灾难性损失，没有恢复的迹象。 本研究通过调查损失如何改变食物网，能量流，溪流中的营养循环以及溪流和陆地栖息地之间的能量交换来研究疾病驱动的两栖动物下降的生态后果。 这将通过继续密切监测2005年大幅度减少的巴拿马河流的生态系统结构和功能来实现。 此外，一个稳定的同位素示踪剂添加将被用来模拟氮循环的流，目前有丰富的两栖动物，但直接在疾病的路径。 疾病导致的两栖动物数量减少是生物多样性的灾难性损失。 迄今为止在这些系统中进行的研究表明，两栖动物的减少对溪流产生了大规模的影响，包括溪流和河岸食物网结构的变化、藻类群落和生产的变化、运输的有机物质的质量改变以及从溪流向陆地生境的能量转移减少。