Results 41 to 50 of about 4,589 (164)

我国模糊网纹溞(甲壳纲:双甲目)的补充描述 [PDF]

open access: yes, 1995
我国模糊网纹溞(甲壳纲:双甲目)的补充描述陈受忠,张世萍,宋希强中国科学院水生生物研究所武汉430072华中在业大学水产系日本Ueno氏在记述中国台湾的枝角类一文 ̄[2]的名录表中列入了模糊网纹(Cerio-daphniadubiaRichard,1..
陈受忠,张世萍,宋希强
core  

Assessing the Corn Belt as an anthropogenic barrier to migrating landbirds in the United States

open access: yesConservation Biology, Volume 39, Issue 5, October 2025.
Abstract Migrating landbirds adjust their flight and stopover behaviors to efficiently cross inhospitable geographies, such as the Gulf of Mexico and the Sahara Desert. In addition to these natural barriers, birds may increasingly encounter anthropogenic barriers created by large‐scale changes in land use. One such barrier could be the Corn Belt in the
Fengyi Guo   +7 more
wiley   +1 more source

郝景盛在西北考查团的植物采集及后来的研究 [PDF]

open access: yes, 2007
郝景盛在西北考查团中的植物考察和采集,是中国学者在新中国成立之前在青海地区有限的几次之一.当时西方人在青藏高原的考察已经很多.郝景盛后来在德国完成的博士论文《青海植物地理》,以他自己的这次考察为基础,充分利用了西方已有的研究成果,对青海东北部作了植物地理学研究 ...
徐凤先
core  

陕西地区110千伏及以上送电线路污闪事故的调查和分析

open access: yesDianci bileiqi, 1981
陕西省地处我国西北内陆,位于黄河中游,全省可分为三个区域:陕北为沙漠和黄土高原,气候寒冷干燥,年平均最大降雨量仅在500毫米以下;关中地区,南依秦岭,北接陕北黄土高原,地形平坦,气候温和,为半干燥地区;秦岭以南为陕南地区,除汉中、安康盆地较平坦外,其他地区山峦起伏,自然植被好,森林繁茂,为亚热带湿润气候,年平均最大降雨量达1250毫米。解放以来,陕西的电力工业得到迅速发展,高压送电线自1957年西(安)—户(县)线投产以来到1980年止 ...
胡其秀
doaj  

On the normative roles of biodiversity and naturalness in conservation

open access: yesConservation Biology, Volume 39, Issue 5, October 2025.
Abstract Nature is an opaque concept. Consequently, the term biodiversity conservation has replaced nature conservation in most conservation contexts. We review the conceptual indeterminacies that plague the terms nature and natural but then show that comparable difficulties plague biodiversity.
David Saltz, Shlomo Cohen
wiley   +1 more source

西北地区生态修复的若干基本问题探讨

open access: yesShuitu Baochi Xuebao, 2003
综合已有的研究成果,对西北地区缺水类型,生态修复的终极目标和绿洲规模的确定基本问题进行了探讨。西北地区缺水类型分析结果表明,不同区域缺水类型组合不同,西北地区潜在景观具有多样性的特点,原生景观具有复杂性的特点,这在黄土高原表现得尤为突出,西北地区生态修复的终极目标是:从潜在景观到原生景观。通过景观研究可指导水资源胁迫下的西北地区生态修复的景观配置与建设;第一,西北地区西部干旱环境形成年代久远,在其长期进化过程中,形成了适宜干旱环境生长的植被类型和种类,这是西北地区生态修复应首选的类型和种类 ...
毛德华 夏军 等
doaj  

Spatial Phylogenetic Analysis of Chinese Lizards: Insights Into Ecological Drivers and Conservation Gaps 中国蜥蜴系统发育的空间分析:生态驱动因素与保护空缺

open access: yesIntegrative Conservation, Volume 4, Issue 3, Page 430-441, September 2025.
Our study identifies southern China, including mountainous regions and islands, as key areas rich in phylogenetic diversity, and phylogenetic endemism of lizards that are currently under‐protected. Current protected areas however do not adequately cover regions that are critical for preserving the evolutionary history of lizards.
Tao Liang (梁涛)   +8 more
wiley   +1 more source

ナンキン コクミン セイフキ ウチモンゴル コウトウ チク ニ オケル トチ カイハツ [PDF]

open access: yes, 2011
大阪大學中國文化論壇 討論文件Discussion Papers in Contemporary China Studies, Osaka University Forum on China張雯:訳 / (trans.:ZHANG ...
Shimada, Miwa   +2 more
core  

呼伦贝尔草原上的大鸨

open access: yes野生动物学报, 1999
大鸨(Otis tarda)在中国有两个亚种,指名亚种(o.t.tarda)只分布在新疆西部的天山及中部吐鲁番,为留鸟;普遍亚种(o.t.dybowskii)分布区比较广,西起新疆塔城盆地北部,向东至黑龙江明水肇东,但其繁殖区已呈岛屿状。越冬地主要在江苏、安徽省北部、江西省鄱阳湖地区和贵州省草海地区。
乌力吉
doaj  

Genetic Diversity and Phylogeographic Structure of the Edible Caterpillars of Gynanisa maja and Implications for the Sustainability of the Species in Namibia

open access: yesIntegrative Conservation, Volume 4, Issue 3, Page 405-415, September 2025.
Assessing the genetic diversity of edible insects harvested from the wild is a pre‐requisite for designing conservation and management policies. The caterpillars of Gynanisa maja (Saturniidae) are harvested in large numbers in mopane woodlands in southern Africa, where they represent a seasonal source of income and nutrition to many rural communities ...
Zwannda Nethavhani   +3 more
wiley   +1 more source

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