Results 101 to 110 of about 27,903 (194)
Shuitu Baochi Xuebao, 2005 对章古台不同林龄樟子松人工林土壤养分、微生物及酶活性进行了测定和分析,结果表明:各林地的土壤养分、微生物和酶活性均表现出差异。与健康林相比,出现生长衰退林地土壤样品的养分指标、微生物和酶活性均有显著程度的降低,表明土壤地力已出现严重衰退。土壤微生物数量、酶活性与土壤养分间呈显著相关关系,可作为评价土壤肥力的指标。解决当前人工林退化的主要措施是因地制宜进行间伐或轮伐,改善林地微生态条件,尽量避免营造人工纯林,建议营造混交林。
杨涛 徐慧 李慧 方德华 朱教君
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India's Health Diplomacy: Advancing Pharmaceutical and MedTech Leadership in the Global South
World Medical &Health Policy, Volume 18, Issue 1, March 2026.ABSTRACT Health diplomacy has become a pivotal aspect of India's engagement with the Global South, intertwining foreign policy, public health, and global collaboration to address disparities while pursuing strategic interests. India's pharmaceutical industry, which accounts for nearly 20% of the world's generics, has positioned the nation as the ...
Gaurav Chanderprakash Mittal +4 more
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Conservation Biology, Volume 40, Issue 1, February 2026.Abstract Urgency to save species from extinction has prompted increased investment in law enforcement in protected areas. To date, such law enforcement has largely focused on increasing costs and reducing opportunities for offending. However, these resource‐intensive approaches are not always effective and can contribute to conflict between people and ...
Freya A. V. St. John +3 more
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Shuitu Baochi Xuebao, 2005 土壤微生物量碳、基础呼吸作用、土壤代谢商是表征土壤质量的重要指标,并且与土壤本身的理化性质有关。脱氢酶活性是土壤微生物种群及其活性的重要敏感性指标之一。通过室内培养,研究了不同铅添加水平(200~1 200 mg/kg)对青紫泥田微生物生物量碳及土壤基础呼吸作用、土壤代谢商、土壤脱氢酶的影响。研究表明:随培养时间延长,青紫泥田生物量碳呈下降趋势,基础呼吸作用随铅浓度升高而加强。土壤代谢商随培养时间延长变化趋势不同。外源铅胁迫下土壤脱氢酶活性随铅处理浓度升高明显受抑制。相关分析表明 ...
李江遐 杨肖娥 陈声明
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Underrepresentation of bats in Africa's protected areas
Conservation Biology, Volume 40, Issue 1, February 2026.Abstract Biodiversity is severely threatened globally, with habitat loss and other human pressures accelerating species extinctions. Protected areas (PAs) are a critical conservation tool; however, their effectiveness in safeguarding many taxa, such as bats, remains unclear.
Cecilia Montauban +9 more
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Shuitu Baochi Xuebao, 2019 通过模拟试验，研究利用生物质炭改善邻苯二甲酸二丁酯（DBP）污染土壤对黄瓜幼苗生理特性的影响。试验设计4个生物质炭处理（CK、C 0.5%、C 1%、C 2%）和3个DBP浓度梯度（0，20，40 mg/kg）。结果表明：DBP污染土壤施入生物质炭，在低含量（C 0.5%）时黄瓜幼苗细胞膜稳定性增强，较高含量（C 1%和C 2%）时细胞膜稳定性与对照基本一致；生物质炭的施入显著增强了黄瓜幼苗SOD活性，降低了CAT活性和光合色素（叶绿素a、叶绿素b、叶绿素a+b和类胡萝卜素）含量 ...
李贞霞 +7 more
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Genetic origins and climate‐induced erosion in economically important Asian walnuts
Conservation Biology, Volume 40, Issue 1, February 2026.Abstract The global climate is undergoing unprecedented changes, posing significant threats to species persistence. However, the spatiotemporal impacts on genetic diversity remain poorly understood, hindering species conservation and management. Walnuts, generally referred to as Juglans regia and J. sigillata, are economically vital in Asia, but little
Peng‐Zhen Fan +17 more
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野生动物学报, 1999 我们都熟知蚂蚁和蜜蜂的社会性生活,但对高等动物的社会性生活了解的不多.狼有集群的习性,但也常常单只活动.狼何时集群,何时单独活动.这是由许多因素决定的.社会性的食肉类动物至少可以从合作中获得好处.所有社会性的食肉动物都知道群体捕食比单独捕食有效得多,这往往被认为是促使它们集群生活的重要原因.合作捕食会从两个方面提高捕食的成功率:（1）能够捕获大型猎物;（2）能提高成功捕杀猎物的百分率.每种益处的重要性都是变化的,这主要依赖于所涉及的捕食者和猎物的种类.
高中信, 王秀辉, 于学伟
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Conservation Biology, Volume 40, Issue 1, February 2026.Abstract Exploring heat tolerance and acclimation capacity can provide an effective approach to evaluating species’ sensitivity to extremely high temperatures due to climate warming. Despite some work on amphibian and reptile thermophysiological adaptation, related questions remain. We reviewed the literature to provide a synthesis of worldwide data on
Zijian Sun +8 more
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野生动物学报, 2000 当今,生物多样性的保护已成为一项紧迫而艰巨的任务,由于人类活动的加剧和森林面积的减小,自然界中的生物正以前所未有的速度灭绝。野生动物作为自然界中最活跃、最引人注目、对环境变化最敏感的生物类群,受威胁程度更大。如何使更多的人了解野生动物的生活习性,提高公众的保护意识,现已成为科学工作者义不容辞的责任。
冯祚建
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