Results 71 to 80 of about 11,190 (177)
, 2013 环境史探讨人类与环境的互动。与以往的历史研究相比,这一研究既充满着机遇,又面临着更大的困难与挑战。几位资深的环境史学家均强调,环境史使历史学成为比从前更为困难的一门学问,历史学者必须尝试学习自然科学并掌握超出传统历史训练的相关知识。换言之,环境史必须采取跨领域或曰跨学科(InTErdISCIPlInAry)的研究途径。1根据研究主题不同,需要结合不同学科及其方法,有学者提出其中最重要的是生态学,它为环境史学家提供了最为巨大的帮助。2不过,如何做到两者的结合实属不易。例如“生态平衡“不仅在社会上广为流行 ...
钞晓鸿
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International Journal of Applied Linguistics, EarlyView.ABSTRACT Previous research has established the relationships between motivation, anxiety, teachers’ support, and self‐regulated learning (SRL) in English‐as‐a‐foreign‐language (EFL) learning. Most of the studies, however, have taken a variable‐centered approach in addressing the variable correlations, while learners’ characteristics and variable links ...
Yuhong Jiao, Barry Bai, Jing Li
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野生动物学报, 2012 通过2004～2009年大连森林动物园的数据调查,从食物的营养价值,环境的丰富度,种群密度三个角度入手,针对大连森林动物园散放区草食动物在半散放混养条件下饲养繁殖及动物群体管理进行浅析,分析其驯养繁殖管理方案的优势,并从可持续利用的自然小生境角度出发,对建立稳定的动物关系群体提出建议。通过分析显示非洲的斑马,澳洲的羊驼,我国西北的岩羊比较适合大连的气候及混养的这种模式,种群数量逐年递增,繁殖状况良好,死亡率也比较低,尤其是岩羊,由于其善攀援跳跃,活动范围广,种群发展最好。长颈鹿,黑斑羚和跳羚适应能力较差,
宋晓东, 张延君, 田秀华
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Genomic responses to increased temperature and pollinator selection in Brassica rapa L.
New Phytologist, Volume 250, Issue 2, Page 1231-1247, April 2026.Summary Rapid environmental change reshapes both abiotic stress and biotic interactions, yet it remains unclear how these combined forces structure plants' genomic adaptation. In particular, the joint influence of temperature and pollinator identity, two ecological axes undergoing simultaneous global shifts, has rarely been quantified at genomic ...
Yanqian Ding, Florian P. Schiestl
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野生动物学报, 2015 蒙古野驴(Equus hemionus)是国家Ⅰ级保护野生动物,被列入濒危野生动植物种国际贸易公约(CITES)附录Ⅰ中。卡拉麦里山自然保护区是蒙古野驴在我国种群数量最大的分布区,同时蒙古野驴也是卡拉麦里山自然保护区的主要保护动物,其种群数量和分布的变动反映着当地生态环境的变化。近年来,准东煤电煤化工产业开发在促进当地经济社会发展的同时,也给卡拉麦里山的野生动物带来了不利影响。通过路线调查和文献资料统计,比较了蒙古野驴种群数量及分布情况的历史变化,分析了卡拉麦里山蒙古野驴的栖息地现状 ...
彭向前
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Wildlife Letters, Volume 4, Issue 1, Page 5-9, March 2026.This essay describes the context of big game hunting in the western United States in the twenty‐first century from a sociological perspective. Using Ogburn's theory of cultural lag as a guide, it explores the relationship of technology and capitalism to hunting.
Stephen L. Eliason
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野生动物学报, 2009 根据野外实地考察,绘制帕米尔高原马可波罗盘羊的分布图。我国马可波罗盘羊主要分布在塔什库尔干自然保护区和萨雷阔勒岭。采用截线取样法对马可波罗盘羊种群数量进行研究,截至2001年,盘羊种群数量为1 650～2 150只;近年我国马可波罗盘羊种群数量超过3 000只。对37群949只盘羊的数据进行分析,盘羊的性比为♂:♀=1:3,群体大小平均为26.4只,最大雌性群为156只。由于山体庞大、地势开阔、冬季无人,在帕米尔高原,盘羊经常结成大群。40～50只以上的大群占所有观察个体数的50.3%,大群除了混合群外,
余玉群 +5 more
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Wildlife Letters, Volume 4, Issue 1, Page 42-55, March 2026.This review summarizes the status of musk deer in China, highlighting severe population declines due to illegal hunting and habitat loss, and proposes integrated conservation strategies including habitat protection, captive breeding, and law enforcement to support the recovery and sustainable management of this ecologically and economically important ...
Feng Jiang +8 more
wiley +1 more source
TetraDENSITY 2.0: a database of population density estimates in tetrapods [PDF]
Motivation: Population density is a fundamental parameter in ecology and conservation, and taxonomic and geographic patterns of population density have been an important focus of macroecological research.
Fundarò Davide +10 more
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新疆乌鲁木齐南山山区天山马鹿(Cervus elaphus songaricus)种群数量调查
野生动物学报, 2014 为了查清新疆乌鲁木齐南山山区天山马鹿(Cervus elaphus songaricus)种群的现状和有效保护与合理利用野生马鹿资源,2010～2011年采用截线抽样法对新疆南山山区天山马鹿的栖息地和种群现状进行了考察。共调查35条样线,总长度78 km,遇见马鹿158头,平均密度为0.52512±0.064758头/km2,栖息地面积697 km2,估计马鹿总数为 366.0±45.1头。雌雄比例2.5:1,亚成体和成体数量明显大于幼体和老体数量。研究区域内马鹿的种群密度和资源总数量比往年有所下降 ...
布左拉·吐尔逊 日沙来提·吐尔地 孜拉吉古丽·西克然木夏米西丁·阿不都热依木 阿依努尔·阿卜杜艾尼 马合木提·哈力克
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