Results 41 to 50 of about 7,934 (168)
Scenarios and strategies for future‐proofing ecosystem management under climatic novelty
Conservation Biology, EarlyView.Abstract Climate change is driving unprecedented declines in dominant, habitat‐forming foundation species across marine and terrestrial ecosystems globally. As climatic novelty becomes the norm, ecosystem reassembly will become increasingly common. Predicting and understanding these transitions, and their implications for future ecosystem functioning ...
Lauren T. Toth +14 more
wiley +1 more source
野生动物学报, 2023 骨龄学（Skeletochronology）方法的发展和使用解决了对野外种群年龄结构的准确判断问题。在两栖类种群年龄结构的研究中，趾骨/指骨制作组织学切片的便捷性得到了广泛认可。通过对骨龄学方法原理的总结，对实际运用中存在的一些容易混淆的概念和影响因素进行梳理和归纳，旨在提高鉴定中各项指标识别的准确性及年龄估算的科学性，为两栖动物物种资源保护及后续深入研究提供具有价值的信息。
李云磊, 原涛, 陆宇燕, 李丕鹏
doaj
Community Structure and Metabolic Activity of Bacterioplankton during Phytoplankton Blooms [PDF]
, 2016 浮游细菌作为海洋生态系统的重要组成部分，在海洋生态系统的物质循环和能量流动中起着重要作用。一方面，浮游细菌通过再矿化作用，将海水中的有机化合物转变为无机物质，为藻类的生长提供各种必需营养元素。另一方面，某些细菌具有抑藻杀藻特性，对藻类的生长起着调控作用。因此，菌-藻关系研究已成为当前海洋浮游植物藻华研究的热点之一。 本论文运用16SrDNA技术探究了不同类型浮游植物藻华期间浮游细菌群落结构；运用宏蛋白质组学技术分析了东海原甲藻藻华爆发期中期和后期浮游细菌群落蛋白质表达谱 ...
李东旭
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Perceived costs as drivers of wildlife management preferences in rural Tanzanian communities
Conservation Biology, EarlyView.Abstract Effectively managing human–wildlife interactions is crucial for fostering coexistence on shared landscapes. Management options are most effective when aligned with the preferences of people directly affected by wildlife, yet little is known about how socioecological factors influence these preferences.
Christian Kiffner +10 more
wiley +1 more source
The impacts of coastal defense structures on rocky intertidal community in Yangtze River Delta [PDF]
, 2016 长江三角洲是长江、黄河以及在此区域的其他河流的活动形成的冲积平原。末次冰期（LastGlacialMaximum，LGM）以后的一万年以来，长江三角洲在海陆交互作用的影响下逐渐扩展。位于长江三角洲地带的近900km的江苏沿岸海岸线除约40km的基岩海岸以外，均为不适宜岩相潮间带生物大量聚集的淤泥质平原海岸。近年来随着中国沿海经济的飞速发展，对土地需求的不断增加，越来越多的沿岸防护建筑正在被修建，成为我国沿岸的“海上长城”。这些沿岸防护建筑显著改变了江苏沿岸的滩涂景观，可能对潮间带群落造成严重影响 ...
黄雄伟
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Drivers of bat researchers’ intent to adopt field hygiene practices
Conservation Biology, EarlyView.Abstract Infectious disease is a growing threat to wildlife, with zoonotic transmission most likely at the human–wildlife interface. One underappreciated activity at this interface is fieldwork with wild animals, but associated risks can be mitigated through field hygiene (FH) practices, such as using personal protective equipment and other appropriate
Joanna L. Coleman +6 more
wiley +1 more source
野生动物学报, 2015 对中国白头鹤圈养种群的统计学和遗传学结果进行了相关分析,并对种群数量、年龄结构、性比情况、基因多样性、近交系数以及未来100 a种群的发展趋势进行了重点研究。结果表明:截止到2013年12月31日,中国圈养白头鹤种群共有存活个体76只,分别饲养于15家单位,其中建立者的数量为16只,潜在建立者的数量为41只。圈养白头鹤种群中育龄个体充足,但幼龄个体数量不足,种群年龄结构不是很合理。白头鹤种群保留了野生个体92.9%的基因多样性,平均近亲系数为0,是一个没有任何近亲繁殖的优质种群。通过分析发现 ...
何相宝 田秀华 李晓敏 周军英 尹惠媛
doaj
A STUDY ON THE STRUCTURE AND SPATIAL PATTERNS of CYCLOBALANOPSIS GLAUCA POPULATIONS IN WESTERN HUANGSHAN [PDF]
, 1996 黄山西坡青冈种群结构与分布格局研究陈小勇，张庆费，吴化前，宋永昌（华东师范大学环境科学系，上海，200062）ASTudyOnTHESTruCTurEAndSPATIAlPATTErnSOfCyClObAlAnOPSISglAuCAPOPulATIO ...
吴化前 +3 more
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International Journal of Applied Linguistics, EarlyView.ABSTRACT The study investigated how writing motivation and self‐regulated read‐to‐write (SRL‐R2W) strategy use was related to writing performance and how the relationship between motivation and SRL‐R2W strategy use varied among different writing performance groups.
Huixuan Zhou +3 more
wiley +1 more source
Zhejiang Daxue xuebao. Lixue ban, 2018 针对标准鸡群算法在求解高维优化问题时过早收敛于局部最优和收敛速度慢等问题，提出了一种耗散结构和差分变异混合的鸡群算法.该算法通过将耗散结构引入至雄鸡位置的更新公式，扩大了鸡群的搜索空间，增强了算法的全局搜索能力；同时，通过对随机选择的个体进行差分变异操作，增强了算法的收敛性能.对选取的18个标准函数进行仿真实验，结果表明，算法的收敛精度、收敛速度和稳定性均明显优于其他几种算法.
HANMeng(韩萌)
doaj +1 more source