Results 51 to 60 of about 1,328,681 (221)
Assessing and strengthening community‐based coastal governance
Conservation Biology, EarlyView.Abstract Community‐based coastal governance is essential for biodiversity conservation and sustainable livelihoods, yet many communities continue to face significant challenges in establishing and sustaining effective governance systems. We sought to improve understanding of the current status of community‐based coastal governance across five countries
Mark Andrachuk +21 more
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Guangxi Zhiwu该文报道了广西苦苣苔科报春苣苔属（Primulina Hance）一新种——平果报春苣苔（Primulina pingguoensis H. S. Ma & B. Pan），该新种在形态学上与囊筒报春苣苔（P. carinata Y. G. Wei, F. Wen & H. Z. Lü）相似，但两者能明显区别，平果报春苣苔花冠裂片狭披针形至线型，长宽比大于2（vs.圆形至卵圆形，长宽比小于1.5），花冠内部具8~10条紫色条纹，与花冠同色，无明显导蜜线（vs.棕色条纹，与花冠不同色，具两条黄色导蜜线 ...
马 虎生 +3 more
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Zhejiang Daxue xuebao. Lixue ban, 2014 以样方法对不同资源位群落进行调查，通过计算群落的生态位宽度、生态位相似性比例和生态位重叠值，分析浙江省7个自然保护区18个常绿阔叶林的12个优势种的生态位特征，探讨了各优势种群在次生林和原生林中生态位宽度、相似性和重叠的差异，比较了乔木树种与小乔木或灌木生态位宽度的差异.结果表明：(1)浙江省各保护区的常绿阔叶林多以木荷或甜槠为建群种或共优种，具有典型的中亚热带常绿阔叶林生态位相似性比例高的特点，且生态位重叠程度较低；(2)次生林中各种群的生态位宽度明显高于原生林 ...
WANJuan(万娟) +6 more
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, 2006 生态安全是国家安全体系中的重要环节之一，城市的生态安全则是一个国家或区域生态安全的基础和核心。本文围绕西部干旱区城市脆弱生态环境等相关问题，结合城市生态学、景观生态学、自然地理学、环境科学等学科的相关理论和研究方法，以及遥感和GIS技术，以乌鲁木齐为研究区进行生态安全评价和预警研究。 空间尺度上，从生态敏感性的角度研究了干旱区城市生态敏感性空间分异特征，并提出相应的缓解措施，为下一步生态安全研究提供了理论支撑。 时间尺度上，利用研究区1989年美国陆地卫星Landsat ...
李凤英
core
Psychometric framework for coexistence with large carnivores
Conservation Biology, EarlyView.Abstract Human–carnivore coexistence is essential for biodiversity conservation, yet measuring the attitudes and behaviors that support it remains methodologically challenging. We developed psychometric scales to assess willingness to coexist with carnivores and the underlying beliefs of this coexistence through an iterative expert elicitation process ...
Benjamin Ghasemi +14 more
wiley +1 more source
, 2010 草地生态系统在全球碳循环中扮演重要角色.中国草地约占中国陆地面积的1/3,但对其碳库大小、动态及其与气候变化的关系缺乏系统研究.基于341个样地调查的地上、地下生物量资料和1982~2006年的卫星遥感数据,利用地上生物量与遥感数据之间及地上生物量与地下生物量之间的关系,估算了中国北方草地生物量碳库及其空间分布,分析了过去25年生物量碳密度和碳库的时间动态及其与气候变化的关系.结果显示:(1)中国北方草地生物量碳库为557.5TgC,地上、地下生物量密度分别为39.5和244.6gC/m2 ...
方精云 +3 more
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Behavioral interventions to reduce demand for threatened freshwater turtles as pets
Conservation Biology, EarlyView.Abstract Growing demand for freshwater turtles as pets has fueled illegal trade and accelerated wild population declines, underscoring the need for theory‐based demand‐reduction interventions. We conducted a three‐part randomized controlled trial with active turtle keepers (n = 1800) in China to test conservation‐ and legality‐framed messages by ...
Wuji Zheng +9 more
wiley +1 more source
, 2009 以黄土沟壑区果园生态系统为研究对象,针对黄土高原果业生产波动性大,生态系统恶化等问题,通过调控果树的生殖生长量,研究了果园生态系统生产力调控及系统响应。结果表明:生产力水平高的处理对土壤深层的水分利用增强,但降低了土壤深层贮水量,从而进一步加重土壤干燥化程度;以生殖生长调控为手段的生产力调控能够显著改善果实的单果重、果实硬度、着色指数等外在品质,果品优果率可提高12.9%～23.5%;通过生产力调控,果业生产经济效益显著提高,果园生态系统健康状况得到维持,果树生产波动性缓解。确定挂果2.25×
鞠艳 +4 more
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Modeling seed germination data to meet biodiversity conservation needs in the Mediterranean
Conservation Biology, EarlyView.Workflow to assess the availability and quality of germination data and assign species' thermal risk in the Mediterranean. (a) Assessment of data availability, including the phylogenetic distribution of the number of records (i.e. available germination data); (b) data quality assessment; and (c) assignment of climate risk categories for species that ...
Diana María Cruz‐Tejada +2 more
wiley +1 more source
Shuitu Baochi Xuebao, 2002 研究建立了北京市生态分区体系,即以区域自然地理为背景的一级生态区,以反映径流形成生态景观作用的二级生态区,以县域土地利用为依据的三级生态区;确定了北京市三级生态分区与对应各种生态用水类型;得到了全市现状生态用水量为39.83×108m3,其中一级生态区,山区生态用水量为21.88×108m3,平原区生态用水量为17.95×108m3;全市各二级生态区,即各河流流域现状生态用水量;全市各3级生态区,即各县(区)现状生态用水量,并得到各生态分区各种不同类型生态用水量值。
陈丽华 余新晓 王礼先
doaj +2 more sources