科技监测服务配置 科技监测服务配置

最小化 最大化
您还没有登录。 请先登录再使用本系统。

研究领域 研究领域

最小化 最大化
   
         
       海岸带环境承载力是海岸带可持续发展研究的重要内容,也是进行海岸带可持续发展评价的重要基础。
       近年来我国新一轮沿海区域发展战略不断上升为国家战略,海岸带环境系统压力趋大,以海岸带环境承载力评判断沿海地区发展的可持续性成为海岸带研究首要关注的问题.本研究在分析海岸带环境承载力基本内涵和特征的基础上,将海岸带生态服务功能纳入指标体系,构建了由产业、人口、经济、岸线、滩涂、主要水污染物、典型生态敏感区等七大要素指标层组成的海岸带环境承载力评价指标体系,该指标层能较好地反映未来产业发展的增长变量和海岸带环境系统关键限制因素的定量或半定量关系.并提出指标量化方法和综合承载力定量评价方法,对未来规划情景的海岸带环境承载状况进行评价,为国家海岸带发展战略的制定和实施提供科学的依据。
   

联系我们 联系我们

最小化 最大化

联系人:赵建民

Email:jmzhao@yic.ac.cn

地址:山东省烟台市春晖路17号 中国科学院烟台海岸带研究所

领域研究动态 领域研究动态

最小化 最大化
«返回

内容

Effects of tidal cycles on shorebird distribution and foraging behaviour in a coastal tropical wetland: Insights for carrying capacity assessment

 

 
标题: Effects of tidal cycles on shorebird distribution and foraging behaviour in a coastal tropical wetland: Insights for carrying capacity assessment
作者: Fonseca, J (Fonseca, Juanita); Basso, E (Basso, Enzo); Serrano, D (Serrano, David); Navedo, JG (Navedo, Juan G.)
来源出版物: ESTUARINE COASTAL AND SHELF SCIENCE  卷: 198  页: 279-287  DOI: 10.1016/j.ecss.2017.09.016  子辑: A  出版年: NOV 5 2017  
摘要: Wetland loss has driven negative effects on biodiversity by a reduction in potential available habitats, directly impacting wetland-dependent species such as migratory shorebirds. At coastal areas where tidal cycles can restrict food access, the degree to which density of foraging birds is mediated by conspecific abundance or by the available areas is crucial to understanding patterns of bird distribution and wetland carrying capacity. We used the bathymetry of two sectors modeled with two numerical matrices to determine the availability of intertidal foraging areas in relation to tidal level (spring and neap tides), and this information was used to estimate shorebird density and foraging activity throughout the low-tide cycle in a tropical coastal lagoon in northwestern Mexico. Relative to spring tides, an 80% reduction in available foraging areas occurred during neap tides. Overall shorebird abundance was significantly reduced during neap tide periods, with differences between species. Densities of shorebirds increased during neap tides, particularly in one sector, and remained similar throughout the low-tide period (i.e. 4 h) either during spring or neap tides. Time spent foraging was consistently lower during neap-tides relative to spring-tides, especially for Long-billed curlew (44% reduction), Willet (37% reduction) and Black-necked stilt (29% reduction). These decreases in foraging activity when available habitats became reduced can hamper the opportunities of migratory shorebirds to reach their daily energy requirements to survive during the non-breeding season. This study shows that when intertidal habitats are severely reduced an important fraction of shorebird populations would probably be forced to find alternative areas to forage or increase foraging time during the night. Serving an essential function as top-predators, these results can have important implications on carrying capacity assessment for shorebirds at coastal wetlands. (C) 2017 Elsevier Ltd. All rights reserved.
入藏号: WOS:000415781000026
作者关键词: Tidal amplitude; Coastal wetlands; Carrying capacity; Shorebirds; Foraging activity; Time restrictions
KeyWords Plus: NORTH-AMERICAN SHOREBIRDS; ESTUARINE SEDIMENT FLATS; INTERFERENCE COMPETITION; FUNCTIONAL-RESPONSE; ECOSYSTEM SERVICES; CALIDRIS-ALPINA; LAND-USE; WADERS; WATERBIRDS; BIRDS
地址: [Fonseca, Juanita; Serrano, David] Univ Autonoma Sinaloa, Fac Ciencias Mar, Paseo Claussen S-N Colonia Los Pinos, Mazatlan 82000, Sinaloa, Mexico. 
[Basso, Enzo; Navedo, Juan G.] Univ Austral Chile, Fac Ciencias, Bird Ecol Lab, Inst Ciencias Marinas & Limnol, Campus Isl Teja, Valdivia 5090000, Chile. 
[Navedo, Juan G.] Univ Austral Chile, Estn Expt Quempillen, Chiloe, Ancud, Chile.
研究方向: Marine & Freshwater Biology; Oceanography

 

原文链接:Effects of tidal cycles on shorebird distribution and foraging behaviour in a coastal tropical wetland: Insights for carrying capacity assessment