Results 31 to 40 of about 907,556 (187)
Conservation Biology, EarlyView.Abstract Bycatch in fisheries is one of the most serious threats to pelagic seabirds, causing major population declines. Mitigation measures can reduce bycatch substantially, but many fisheries fail to apply best practices, and seabird mortality remains high.
V. Warwick‐Evans +2 more
wiley +1 more source
Dianci bileiqi, 1980 本文研究了具有内部微观结构缺陷的瓷件在单轴向应力状态下强度的维布尔分布,给出δu=0情况下决定维布尔参数的一个图解方法。根据维布尔分布导出抗折瓷件在一定可靠性下极限应力下限值的计算公式,并比较了按维布尔分布和按正态分布计算的在相同可靠性下瓷件极限应力下限值的结果,结果表明按维布尔分布计算的下限位偏于安全。
马功勋, 刘长荣, 陶增炎
doaj
Conservation Biology, EarlyView.Abstract Knowledge of species distributions is essential for informing policies on nature conservation and restoration. However, updating them on a regular basis and doing so in a harmonized manner at the international level is difficult. The European Bird Census Council integrated national monitoring data covering 5 years to update farmland bird ...
Sergi Herrando +54 more
wiley +1 more source
Assessing differences among elasmobranch nurseries to aid conservation based on a genomics framework
Conservation Biology, EarlyView.Abstract Elasmobranch nurseries often differ in environmental conditions, demographics, and use patterns. These differences affect the distribution of genetic variation among nurseries. However, conservation and management strategies often fail to account for such differences because they are difficult to characterize.
Dominic G. Swift +8 more
wiley +1 more source
, 1996 椴树属Tilia是椴树科一个形态特殊且唯一的北温带分布属,分布于亚洲、欧洲和北美,构成典型的北温带分布格局,三个分离的分布区之间缺乏共有种。本文对各分布区的种类进行重新评价,确认全属25种。其中东亚17种,占68％,包含了现存种类各个演化阶段的类群,是现代分布中心;欧洲-西西伯利亚6种,属于木果组及壳果组;北美2种,均为木果组成员。化石分布与现代地理分布格局基本相似,但分布纬度较现代分布偏北,达到北纬80°附近,且还出现于现今无椴树分布的亚洲大陆腹地,北美西部椴树至第三纪末完全绝迹 ...
唐亚,诸葛仁, 诸葛仁
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Gaoya dianqi, 2003 利用表面电荷法对绝缘子表面的电压分布和场强进行了计算,研究了影响电压分布的某些因素,如均压环、伞裙对电压分布的影响。计算表明,合成绝缘子的电压分布特性与瓷质绝缘子有很大不同,其电压分布非常不均匀,高压端承受了更高的电压。伞裙和均压环均能改善电压、场强分布,但合成绝缘子均压环对电压分布均匀性的改善不如瓷质悬式绝缘子。
郭效金
doaj
Emerging applications of large language models in ecology and conservation science
Conservation Biology, EarlyView.Abstract Large language models (LLMs) mark a major development in artificial intelligence, with potentially transformative implications for ecology and conservation science. Built on advanced deep‐learning architectures, these models can support a wide range of tasks. We reviewed emerging applications of LLMs, drawing on the wider scientific literature
Christos Mammides +5 more
wiley +1 more source
, 2010 【目的】研究不同生境的多枝树柳种群空间分布点格局。多枝柽柳(Tamarix ramosissima)种群在自然界中主要有4种生境分布类型:风沙土生境类型、草甸土生境类型、吐加依土生境类型和盐土生境类型。【方法】采用点格局分析法分析了不同生境中多枝柽柳在不同尺度下的空间分布格局。【结果】①风沙土生境类型,尺度2~7 m以内,其为集群分布,当尺度大于7 m时,则为随机分布;②草甸土生境类型和吐加依土生境类型的柽柳种群,在所有的尺度(t)下,均显著地偏离集群分布,呈随机分布;③盐土生境类型,尺度6~7 m以内,
陈金星, 尹林克
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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
, 1999 对攀枝花苏铁（Ｃｙｃａｓｐａｎｚｈｉｈｕａｅｎｓｉｓ）种群的地理分布、数量特征、空间分布格局和毁坏历史进行了野外调查和研究。结果表明：攀枝花苏铁种群的自然栖息地是相互隔离和片断化的。已发现的１３个自然种群中，８个分布在金沙江河谷，５个种群分布在金沙江支流河谷；最大的种群位于攀枝花市郊，占有面积约３８０ｋｍ２。７９年以来的商业采挖使８个种群灭绝，种群分布区从３０７００ｋｍ２减少到８８００ｋｍ２，种群占有面积从１１５０ｋｍ２减少到６３０ｋｍ２。３个被研究种群的分布格局为集群分布，以幼苗聚集程度最大 ...
何永华,李朝銮, 李朝銮
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