Roe John H
Department of Biology, University of North Carolina Pembroke, One University Drive, Pembroke, North Carolina 28372, USA.
Herpetol Conserv Biol. 2023 Apr;18(1):140-154. Epub 2023 Apr 30.
Turtle populations are in decline worldwide, requiring immediate conservation and management actions. For species with broad geographic ranges that cover diverse environmental contexts, region-specific information on declining species could inform more targeted management plans. I examined the ecology of a Spotted Turtle () population in a temporally dynamic wetland system in the Southeastern Plains ecoregion of North Carolina. Turtles selected forested wetlands and streams while avoiding open wetlands and river habitats, but used terrestrial habitats minimally and randomly. Turtles responded to wetland drying by remaining in wetlands and maintaining modest levels of activity during short-duration drying events (< 1 mo), but moved very little during longer droughts (7 mo). Turtles had prolonged active seasons (February-October) as long as wetlands and streams were flooded, with movement rates peaking in late spring at 23.6 ± 3.7 m/d (mean ± standard error). Turtles had large home ranges (14.1 ± 4.3 ha) that often included multiple local stream networks used as movement corridors between forested wetland patches and as activity centers when wetlands dried. I suggest that conservation plans for include large management areas that protect a network of streams and adjacent forested swamps in the Southeastern Plains and perhaps other lowland ecoregions in the Southeastern U.S. Because terrestrial habitats were not used for extended refuge during drought, certain low-impact land uses in adjacent terrestrial areas are not likely to negatively impact populations, but terrestrial forests would still be important in maintaining overland travel corridors.
全球海龟种群数量正在减少,需要立即采取保护和管理行动。对于地理分布范围广泛、涵盖多种环境背景的物种,有关濒危物种的特定区域信息可为更具针对性的管理计划提供参考。我研究了北卡罗来纳州东南平原生态区一个随时间变化的湿地系统中斑点龟()种群的生态。海龟选择森林湿地和溪流,而避开开阔湿地和河流栖息地,但对陆地栖息地的利用极少且无规律。在短期干旱事件(<1个月)期间,海龟通过留在湿地并保持适度活动水平来应对湿地干涸,但在较长时间干旱(7个月)期间活动极少。只要湿地和溪流被淹没,海龟就有较长的活跃季节(2月至10月),移动速度在春末达到峰值,为23.6±3.7米/天(平均值±标准误差)。海龟的活动范围很大(14.1±4.3公顷),通常包括多个当地溪流网络,这些溪流网络被用作森林湿地斑块之间的移动廊道以及湿地干涸时的活动中心。我建议,斑点龟的保护计划应包括大型管理区域,以保护东南平原以及美国东南部其他低地生态区的溪流网络和相邻的森林沼泽。由于干旱期间陆地栖息地未被用作长期避难所,相邻陆地区域某些低影响的土地利用不太可能对斑点龟种群产生负面影响,但陆地森林对于维持陆上移动廊道仍很重要。