Results 101 to 110 of about 107,409 (290)
New Phytologist, EarlyView.Summary The importance of marine angiosperms, or seagrasses, as foundation species for marine coastal ecosystems is in marked contrast to their low species number of only 70 described taxa. Seagrass species tend to have very similar overall morphologies dictated by hydrodynamic forces of the ocean environment.
Xiaomei Zhang +14 more
wiley +1 more source
Functional groups of benthic macrofauna in the 14th Yong intertidal zone of Nansha,Guangzhou [PDF]
, 2016 大型底栖动物根据食性可分为浮游生物食者(planktophagous,Pl)、植食者(phytophagous,Ph)、肉食者(carnivorous,C)、杂食者(omnivorous,O)和碎屑食者(detritivorous,D)五个功能群。本文根据2007–2008年度和2013–2014年度在茳芏(Cyperus malaccensis)、海桑(Sonneratia caseolaris)2种生境调查获得的各4个季度的大型底栖动物数据,分析了广州南沙十四涌潮间带大型底栖动物功能群的生境差异 ...
曾佳丽 +6 more
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Public Administration, EarlyView.ABSTRACT A “whole community” strategy is central to disaster management and community resilience in the United States. However, the specific means by which community‐level stakeholders in the private and nonprofit sectors function as partners with government agencies in providing key disaster‐related services are currently underexamined.
Suyang Yu, Brian J. Gerber
wiley +1 more source
Ecological safety assessment of egrets in Xiamen National Nature Reserve [PDF]
, 2006 [摘要]：白鹭的生态安全是指白鹭所处的生态系统能够维持白鹭种群持续生存的需求和条件, 其中关键是白鹭生境的安全。白鹭 生境安全从根本上取决于生境的适宜性和人为对生境的干扰程度, 又可以理解为生境受到人类干扰后所能保持的生态适宜性。 分别选择白鹭在厦门的2 个主要繁殖栖息生境 大屿岛和鸡屿岛和10 个代表性觅食生境为研究对象, 对白鹭生境的生态适 宜性和人为干扰程度进行分别评价。其中, 生境适宜性评价采用指标体系法, 通过赋值、计算进行评价; 人为干扰程度评价主要 依靠地理信息系统分析方法 ...
HONG Hua Sheng +7 more
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Comparative study of the macrobenthic community in intertidal mangrove and non-mangrove habitats in Tong'an Bay,Fujian Province [PDF]
, 2010 底栖动物群落是红树林生态系统多样性研究的重要内容之一。为了解大型底栖动物群落对高有机质含量和富营养的红树林生境的响应,从2006年4月到2007年1月,对福建省同安湾红树林生境和非红树林生境大型底栖动物群落及其时空变化进行了研究。我们在同安湾红树林种植区设置了凤林(fl)和山后亭(XA)两条断面,每条断面在红树林内各设2个取样站(fl1,fl2,XA-A和XA-b),林外各设1个取样站(fl3和XA-C)。底质研究结果显示凤林3个取样站(fl1,fl2和fl3 ...
傅素晶, 周细平, 王雯, 蔡立哲
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Mobilizing fears? How proximity to deportation threat affects political participation
Policy Studies Journal, EarlyView.Abstract Policies often provoke political changes, which are collectively known as feedback effects. Studying state variation in immigration policy, scholars have shown that proximity to hostile policy tends to mobilize Latinos. But not every member of the Latino community is likely to perceive the same proximity to anti‐immigrant policies.
Mackenzie Israel‐Trummel +2 more
wiley +1 more source
Policy Studies Journal, EarlyView.Abstract Defined by threat, urgency, and uncertainty, crises produce opportunities for government leaders to exploit and create meaning around their policy decisions in such unstable circumstances. In narrating their preferred policy solutions, one of the tools governments can use is relying on evidence‐based information.
Laura Mastroianni, Stefania Profeti
wiley +1 more source
Method and Practice in Setting Coastal Construction Setback Line: A Case Study in Longhai [PDF]
, 2016 海岸带地区由于其富饶的资源、优美的环境、优越的地理位置和独特的海陆性质，使其成为人类活动最密集和最活跃的区域。然而人类为了享受海岸带地区为其生存和发展带来更大的经济利益，一方面越来越多的建筑物和基础设施出现在距海岸线更近的地方，海岸侵蚀以及自然灾害已经严重的威胁到沿海地区人类生命财产的安全；另一方面由于人类活动的加强，海岸带的生态系统遭到破坏，生态环境日趋恶化。如何协调海岸地区的和谐发展，实现海岸带经济发展的可持续性已经成为当今社会最关注的热点问题之一 ...
黄玥
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