Results 61 to 70 of about 15,154 (186)
野生动物学报, 2020 气候变化是导致生境丧失和生物多样性下降的主要因素之一。研究气候变化对物种生境的影响对于保护物种多样性，维护生态系统功能完整性具有重要意义。本研究以新疆为研究区域，以塔里木兔、草兔和雪兔为研究对象，选取可能影响它们生境分布的10个环境因子，利用MaxEnt模型预测它们当前和未来RCP 4.5和RCP 8.5两种气候情景下2041—2060年（2050s）、2061—2080年（2070s）的潜在生境分布，并找出影响生境分布的关键因子。研究结果表明，模型预测新疆兔属3个物种生境分布的精度达到较高水平 ...
伊拉木江·托合塔洪1阿迪力·艾合麦提 1 +5 more
doaj
Uncovering correlates of decline and critical refuges for a threatened terrestrial mammal
Conservation Biology, EarlyView.Abstract Globally, the geographic ranges of numerous species are contracting. Identifying spatiotemporal patterns of threat impact can illuminate why species decline in some parts of their range but persist in others. We developed a correlative approach to identify species’ response thresholds and locate ecological refuge areas associated with ...
Natalya M. Maitz +5 more
wiley +1 more source
野生动物学报, 1997 我们于１９９４年３～８月对安徽省女山湖７种生境繁殖鸟类及群落进行了研究。共记录到繁殖鸟类５１种，生境Ⅶ种类最多，生境Ⅰ和Ⅲ最少。群落种的多样性指数最大的为生境Ⅶ，最小的为生境Ⅲ。多样性平均数控制图可将７种生境分为３组。依据鸟类对生境利用情况和鸟类群落特征对７种生境进行评价和排序，结果是Ⅶ－Ⅵ－Ⅱ－Ⅳ－Ⅴ－Ⅰ－Ⅲ。
孙跃岐 +3 more
doaj
Scientists’ warning on the global destruction of rock outcrop ecosystems
Conservation Biology, EarlyView.Abstract Rock outcrops are geological formations that harbor a highly specialized biota adapted to harsh environmental conditions that differ from their surrounding landscapes. They are globally distributed, especially in old, highly weathered landscapes, and can function as habitat islands containing high levels of endemism and distinct evolutionary ...
Luiza F. A. de Paula +19 more
wiley +1 more source
Zhejiang Daxue xuebao. Lixue ban, 2010 海底地下水排泄(SGD)是海岸带陆海相互作用的一个重要的自然过程.系统介绍SGD的发生过程及其定量测定的方法,并通过水文计算和野外调查,在估算了区域海底地下水排泄量和分析了海水与地下水中氮、磷、碳等营养物质差异的基础上,讨论了SGD对近海海域生态环境的潜在影响,这对正确区分近岸海域营养物质的来源和认识中国沿海水域频繁发生的赤潮藻暴发性增殖事件的原因,具有重要的理论和实践意义.
JIZhong-qiang(季仲强) +4 more
doaj +1 more source
Institutional lessons from the Nordic management model
Conservation Biology, EarlyView.Abstract To improve wildlife management outcomes, in terms of reaching management goals and increasing legitimacy, Nordic countries have developed institutional systems involving stakeholders that aim for a more inclusive and participatory model.
Jens Nilsson +2 more
wiley +1 more source
野生动物学报, 2009 3S技术可快速、准确、实时地获取、处理空间信息,具有极大的应用价值。该文介绍了3S技术在研究野生动物生境格局、生境破碎化、生境因子特性、生境分析模型建立、生境评价等诸多方面中的应用,综合了近年来的最新研究进展,并探讨了今后3S技术在野生动物生境研究中的应用前景。
迪力夏提·阿不力孜 +2 more
doaj
Zhejiang Daxue xuebao. Lixue ban, 2013 以ICR雄性小鼠为实验动物、以紫外线为诱变剂，研究了温郁金对紫外线致ICR雄性小鼠免疫遗传损伤的拮抗效应.采用了小鼠骨髓嗜多染红细胞（polychromatic erythrocyte，简称PCE）微核实验等方法.测定了小鼠血象、血红蛋白含量、胸腺及脾指数，小鼠肝脏过氧化氢酶（catalase，简称CAT）活性，小鼠骨髓嗜多染红细胞(PCE)的微核率等指标.结果显示：实验剂量的温郁金均能使紫外线引起脾脏指数和胸腺指数、红细胞数、白细胞数以及血小板数、血红蛋白含量和CAT活性的下降明显回升 ...
QIANXiao-wei(钱晓薇) +4 more
doaj +1 more source
Conservation Biology, EarlyView.Abstract Ecological niche models (ENMs) are used to assess the abiotic preferences of species by linking their occurrences to the environmental conditions in which they live. We developed a fossil‐informed ENM framework that integrates mid‐Holocene and modern occurrences to test niche stability and reconstruct abiotic niche characteristics for four ...
Claire. M. Williams +3 more
wiley +1 more source
Shuitu Baochi Xuebao, 2001 生态环境用水研究是我国生态环境建设中亟待解决的重大问题,本文从概念着手,系统论述生态环境、生态环境建设、生态环境用水的内涵,并对目前存在的一些易混淆概念进行了辨析.介绍了目前研究中有关生态环境用水的计量方法.回顾生态环境用水研究的历史,指出了目前研究中存在的主要问题及今后研究的重点.
刘霞 王礼先 张志强
doaj