Results 11 to 20 of about 41,530 (238)
Shuitu Baochi Xuebao, 2004 研究了南方红壤丘陵区不同森林恢复类型下生物多样性的变化，并用逐步多元回归分析法探讨了10种土壤生物学指标对多样性变化的响应。结果表明：研究样地中物种多样性以天然次生林最高。不同土壤生物学指标对物种多样性变化的响应不尽相同，其中土壤有机质、微生物生物量碳、细菌数量、真菌数量、微生物总数、脲酶、酸性磷酸酶等7个指标随着灌木物种多样性的增加而得到改善；细菌数量和酸性磷酸酶随乔木物种多样性的增加而增加；放线菌数量和多酚氧化酶随灌木个体数的增加而增加；真菌数量和酸性磷酸酶活性随乔木个体数的增加而减少 ...
郑华 欧阳志云 易自力 赵同谦 王效科 苗鸿 彭廷柏
doaj +2 more sources
Study on the Systematic Conservation Planning based conservation pattern of marine biodiversity in Xiamen [PDF]
, 2015 随着经济发展、人口增加和城市化程度的加深，人类活动正在导致其赖以生存和发展的海洋生物多样性的减少甚至丧失。建立海洋保护区是目前保护海洋生物多样性的重要途径。然而传统海洋保护区规划往往仅考虑保护少数物种，而缺乏对海洋生物多样性所依托的海岸生境的保护的考虑；很多保护区范围是人为划定而缺少对保护成本的考虑，导致付出很高的成本却没有达到生物多样性保护的目标，有些地方甚至由于成本过高导致保护区形同虚设。研究平衡生物多样性保护和社会经济发展 ...
陈璟明
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Conservation Funding at the Local Level 地方层面的保护资金
Wildlife Letters, EarlyView.Direct conservation fund transfer to local communities ensures the involvement of these communities in decision‐making and fund utilisation, which will ultimately lead to effective biodiversity conservation. A Cakchiquel family in the hamlet of Patzutzun, Guatemala, 1993. Credits: John Issac. Source: UNEP‐WCMC Internal Resources.
Jithu K Jose
wiley +1 more source
Study on latitudinal gradient of species diversity in forest communities [PDF]
, 2015 森林群落结构和物种多样性的空间分异规律一直是生态学研究的热点问题。近年来，关于森林群落结构的描述与物种多样性的测定方法等研究也都有所发展，但这些研究大多是对森林生态系统的定性描述，而且方法不一，数据之间也缺乏可比性。 群落的组成结构是群落的重要标志，研究群落结构是研究群落物种多样性意义的理论基础，所以从群落组成结构的角度来探讨生物群落的物种多样性具有重要的意义，为进一步深入研究生物多样性功能及确定功能群提供理论基础 ...
孙影
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Wildlife Letters, EarlyView.Many nocturnal animals are difficult to study because they are rarely seen, including nocturnal primates, galagos and pottos, in West Africa. Working with over 600 people in 52 villages in southern Guinea‐Bissau, we found that communities frequently recognized galagos by their red eyeshine and distinctive calls, while pottos were not known.
Chloe Chesney +6 more
wiley +1 more source
Wildlife Letters, EarlyView.Tracking with GPS and accelerometers shows that great evening bats in subtropical China use two overwintering strategies: some remain in continuous hibernation, while others switch between torpor and activity as temperatures change. This behavioral flexibility, shaped by climate, underscores the importance of protecting diverse roosting habitats for ...
Zhiqiang Wang +7 more
wiley +1 more source
Evolutionary algorithms in dynamic environments [PDF]
, 2006 The file attached to this record is the author's final peer reviewed version.Evolutionary algorithms (EAs) are widely and often used for solving stationary optimization problems where the fitness landscape or objective function does not change during the
Wang, Dingwei +2 more
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Effects of Land Use Change on Imbalance in Ecosystem Services:A Case Study of Laizhou Bay Coastal Zone [PDF]
, 2016 以莱州湾海岸带为研究区,基于2000年、2005年、2010年和2014年多时相土地利用数据,应用生态系统服务价值评估,逐层剖析土地利用变化对生态系统服务失衡特征的影响。结果表明:莱州湾海岸带供水与空气组分调节服务呈负值,2000~2014年,生态系统服务总价值丧失43%(147亿美元/a),生态系统服务多样性降低甚至丧失,呈向海性,围填海造成162亿美元生态损失。土地利用变化方式是造成生态失衡的主因,主要包括:交通工矿、盐田、养殖及城镇扩张,滩涂、河口湿地、耕地被侵占。滩涂和河口湿地减少,导致废物处理、
侯西勇 +4 more
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Wildlife Letters, EarlyView.Although once abundant across its range, gray foxes (Urocyon cinereoargenteus) are purportedly declining. While range maps indicate that gray fox potentially occur throughout the central United States, contemporary distribution maps are needed. We developed a Habitat Suitability Model for six states, leveraging gray fox presence data in an ensemble ...
Daniel J. Benson +4 more
wiley +1 more source
Functional Ecology, EarlyView.Read the free Plain Language Summary for this article on the Journal blog. Abstract Ecological communities are stressed by rapid and complex anthropogenic changes, threatening the persistence of biotic interactions and ecosystem functioning. Plant–pollinator communities, for instance, undergo structural transformations as a result of land‐use change ...
Erliang Gao +8 more
wiley +1 more source