Results 21 to 30 of about 56,474 (245)

Greenhouse gas emissions from croplands of China [PDF]

open access: yes, 2003
China possesses cropland of 1.33 million km 2. Cultivation of the cropland not only altered the biogeochemical cycles of carbon (C) and nitrogen (N) in the agroecosystems but also affected global climate.
Bohan, Liao   +13 more
core   +1 more source

First Confirmed Cooperative Breeding of the Brown Hornbill (Anorrhinus austeni) in China at the Sino–Lao Frontier 中国中老边境尚勇保护区首次记录白喉犀鸟 (Anorrhinus austeni) 的合作繁殖行为

open access: yesIntegrative Conservation, EarlyView.
First confirmed breeding of the Brown Hornbill in China, documented through cooperative feeding in Shangyong Protected Area. ABSTRACT The Brown Hornbill (Anorrhinus austeni), a Near Threatened frugivore, reaches the northern edge of its distribution in southern Yunnan, China, yet breeding had not been previously documented with site‐attributed nests in
Junsong Li   +8 more
wiley   +1 more source

安氏新银鱼(Neosalanx anderssoni)性别特异性位点筛选及性别鉴定方法开发

open access: yesHaiyang yu huzhao
安氏新银鱼是我国重要的小型经济鱼类物种,具有较高的经济价值。但目前缺乏一种快速、经济有效的性别鉴定方法,极大地阻碍了其性别决定分子机制、性染色体演化历程的研究和水产育种与养殖技术方面的生产实践。本研究通过比较安氏新银鱼雌性与雄性的全基因组重测序数据,发现雌雄之间存在一个显著差异的基因组区域(chr02: 2 798 574~5 434 239 bp)。基于测序深度差异分析筛选得到3个雌性特异性片段,长度分别为10 bp、167 bp和53 bp。在长为167 bp的雌性特异性位点附近设计引物 ...
王 心悦   +4 more
doaj   +1 more source

The relationship between shrimps community structure and environmental factors in Jiushan Islands waters(韭山列岛海域虾类群落结构与海洋环境因子的关系)

open access: yesZhejiang Daxue xuebao. Lixue ban, 2019
根据韭山列岛海域2015 年11 月(秋)、2016 年2 月(冬)、5 月(春)、8 月(夏) 的调查资料,运用相对重要性指数(index of relative importance,IRI)、冗余分析(redundancy analysis,RDA)、数量生物量曲线 (Abundance-biomass comparison curve,简称ABC 曲线) 及W 统计量(W-statistics) 等方法,分析了该海域优势种虾类及其与环境因子的关系。结果表明,保护区共调查到暖温、暖水性虾类16 种,
LUKaner(卢衎尔)   +6 more
doaj   +1 more source

A Research on Model of Community Participation in Ecotourism of Marine Park ——A Case Study on Zengcuoan and Huangcuo [PDF]

open access: yes, 2015
滨海生态旅游是滨海旅游可持续发展的一种方式,是以旅游目的地生态、经济与社会和谐共生为目标的发展。为了保证这一目标的有效持续进行,我国目前已在原来海洋特别保护区的基础上建设以“生态旅游”为主导功能的国家海洋公园制度。无论是对滨海生态旅游的发展还是国家海洋公园的建设管理,社区参与都是其可持续发展的重要内容。社区参与有助于MPAs生态资源环境的保护,沿岸传统风俗文化的维护,是滨海旅游目的的可持续发展的有效方式。国外在生态旅游开发管理和海洋保护区建设管理方面都积累了较为丰富的经验 ...
廖雅静
core  

Functional Stability Despite Taxonomic Changes in Mixed‐Species Foraging Flock Participants Along an Elevational Gradient in Knuckles Montane Reserve, Sri Lanka 斯里兰卡纳克斯山地保护区 (Knuckles Montane Reserve) 海拔梯度上混合物种觅食群参与者的功能稳定性与分类变化

open access: yesIntegrative Conservation, EarlyView.
This research reveals the functional stability of mixed species foraging flocks (MSF) and their foraging height change with different taxonomic differences along the elevational gradient at Knuckles Montane Reserve, Sri Lanka. This offers new insights into how MSFs sustain with the elevational gradients supporting the altitudinal shifting species ...
Vimukthi. R. Gunasekeara   +3 more
wiley   +1 more source

Marine Ecological Damage Assessment and Compensation: Theory, Approaches and Case Studies [PDF]

open access: yes, 2015
海洋生态系统是地球生命支持系统之一,也是支撑人类生存和发展的重要资源宝库,对于人类经济的繁荣和生活质量的提高贡献巨大。然而,随着人类对海洋开发进程的加快,海洋环境与海洋生态系统面临着越来越大的压力,海洋资源利用冲突、海洋环境质量退化和生态破坏问题日益凸显。建立海洋生态损害补偿机制被认为是解决海洋资源利用冲突,保护海洋环境和生态系统永续发展的有效途径之一,而海洋生态损害补偿理论和方法的研究则是其重要的前提。目前,生态补偿的研究与实践多集中在陆域生态系统,涉海方面的研究尚不多见 ...
饶欢欢
core  

“Not a Single Leaf Is Meant to be Taken With You”: Conservation Motivations and Belief Systems in a Khasi Sacred Landscape of Meghalaya, India “一片叶子都不许带走”:印度梅加拉亚邦卡西族神圣景观中的保护动机与信仰体系

open access: yesIntegrative Conservation, EarlyView.
This study examines the Mawphlang Sacred Forest in Meghalaya as a culturally embedded model of community‐led conservation. Drawing on qualitative fieldwork, it highlights how spiritual reverence, sacred taboos, and ancestral authority shape ecological stewardship, complementing formal governance systems.
Mrinal Saikia
wiley   +1 more source

2010_2016年国际极地研究综合评价分析 [PDF]

open access: yes, 2017
极地在气候系统、全球资源和战略中具有重要意义,并且随着人类对它的开发,极地研究也日益成为地球与环境科学领域的核心和热点议题。基于Web of Science 数据库收录的2010 - 2016 年SCI文章,利用文献计量方法,结合国际政策和战略,分析了2010 - 2016 年极地研究的发展格局和变化趋势。结果表明: ( 1) 近年来国际极地研究论文年发文量总体呈持续增长态势,年均增幅为3. 6%。( 2)发达国家及高纬度国家是极地领域的主要研究力量,美国占据绝对优势。( 3) 在SCI ...
吴秀平   +4 more
core  

Justice in coexistence: Pastoralism and large carnivores on the Qinghai‐Tibet Plateau

open access: yesPeople and Nature, EarlyView.
Abstract The conflict between livestock husbandry and large carnivore conservation presents significant challenges in grassland ecosystems worldwide. Achieving sustainable coexistence among herders, livestock and large carnivores requires reconciling diverse perspectives and interests through equitable, inclusive and fair processes that address both ...
Yufang Gao, Yue Yu
wiley   +1 more source

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