CRB: Survival of Migrant Tropical Butter-Flies in Fragmented Forest

9400011史蒂文森迁移是热带地区一种被广泛认识但了解甚少的现象。 在制定保护计划时，需要特别考虑迁移的物种，因为它们依赖于至少两个季节性栖息地，并且它们可能依赖于中途停留地的资源。 最近，蝴蝶在哥斯达黎加蒙特韦尔德附近的山上东西迁移。 一个令人惊讶的大部分，约80%（260种），现存的太平洋斜坡和低地动物季节性移动到大西洋一侧。 我们将量化蒙特韦尔德地区移民的规模，方向和时间组成部分。 将研究沿着整个迁徙路线的四个重点物种的种群水平和当地资源的变化。 生活史，形态和生理特征的比较将被用来排名栖息地专业化和物种的迁移能力。 还将比较移民和居民的干林，以研究他们的相对敏感性栖息地破碎化。 对哥斯达黎加其他地区的调查将提供关于蝴蝶迁徙的广泛地理视角。 这些研究将共同促进热带无脊椎动物的保护，并提高我们识别迁徙物种独特资源需求的能力。

9400011 Stevenson Migration is a widely recognized but poorly understood phenomenon in the tropics. Species that migrate need special consideration when developing conservation plans because they depend on at least two seasonal habitats and they may rely on resources at stopover sites allow the migration paths. Recently the east-west migration of butterflies over the mountains near Monteverde, Costa Rica. A surprising large fraction, approximately 80% (260 species), of the extant Pacific slope and lowland fauna move seasonally to the Atlantic side. We will quantify the magnitude, direction and temporal components of migrants in the Monteverde region. Changes in population levels and local resources of four focal species will be studied along the entire migration route. A comparison of life-history, morphological, and physiological traits will be used to rank habitat specialization and the migration capability of species. Comparisons will also be made between migrants and residents of the dry forest to examine their relative sensitivities to habitat fragmentation. A broad geographic perspective on butterfly migration will be provided by surveys in other parts of Costa Rica. Together these studies will advance the conservation of tropical invertebrates and increase our ability to identify the unique resource needs of migrant species.