Nocturnal Calling Frog Surveys at Marsh-Billings-Rockefeller NHP in Vermont, USA (1999-2000)

In order to help guide the development of a forest management plan, a biological inventory of the amphibian and reptiles within the park and adjacent lands was conducted in 1999 and 2000. To inventory frogs, a protocol established for the Vermont Calling Frog Survey was modified and used to sample the Pogue, the Field-Wetland, and the Hardwood-Wetland. A total of 10 listening stations were established. Systematic aural surveys of calling frogs occurred on rainy or humid nights throughout the spring and summer. At each station, all frogs heard calling during a 10-minute period were identified to species and their relative abundance estimated based upon chorus.

为辅助森林经营方案的编制，研究团队于1999年至2000年间对某公园及其毗邻区域内的两栖动物与爬行动物开展了生物普查。针对蛙类调查，研究人员对佛蒙特州鸣蛙调查（Vermont Calling Frog Survey）所制定的标准规程进行优化调整，用于对波格湿地（Pogue）、田野湿地（Field-Wetland）以及硬木湿地（Hardwood-Wetland）进行采样调查。本次调查共设置10个监听站点。在春季至夏季的多雨或潮湿夜晚，研究人员开展系统性的蛙类鸣叫声听觉普查。在每个监听站点，研究人员会对10分钟监听时段内听到的所有鸣唱蛙类进行物种鉴定，并依据鸣唱合唱群的规模估算其相对丰度。