Results 11 to 20 of about 213 (133)

鄱阳湖湿地豆雁(Anser fabalis)越冬种群的春季迁徙路线及其活动特征

open access: yes, 2020
了解迁徙路线和迁徙前后活动规律对候鸟的保护具有重要意义.2019年2-3月,在鄱阳湖对20只豆雁(Anser fabalis)佩戴了卫星跟踪器,研究了鄱阳湖豆雁越冬种群的迁徙路线和活动特征.结果表明,最早的个体在3月12日开始北迁,较晚的个体4月25日北迁,截至6月20日仍有部分个体没有迁徙.豆雁卫星追踪时间为60.5±15.6天(n=19),迁徙距离为1349.5±1004.9 km(n=18),迁徙时间为34.7±16.1天(n=18),停歇地的数量为6±3(n=18 ...
曹开强   +11 more
semanticscholar   +1 more source

Heavy metal distribution in the eggs of four species of ardeids and in the body tissues of Egretta garzetta in some [PDF]

open access: yes, 2009
本研究采用电感耦合等离子质谱(ICP-MS)对福建岛屿白鹭(Egrettagarzetta)、池鹭(Ardeolabacchus)、黄嘴白鹭(Egrettaeulophotes)和岩鹭(Egrettasacra)卵的不同部位及白鹭雏鸟各组织中的重金属进行检测,测定了铬(Cr)、锰(Mn)、镍(Ni)、铜(Cu)、锌(Zn)、镉(Cd)和铅(Pb)等7种重金属元素的含量。对重金属元素在卵的各部位及雏鸟各组织中的含量差异进行研究,探讨重金属在鹭卵及白鹭雏鸟中的分布规律及积累趋势 ...
王晓彦
core   +2 more sources

Genetic Structure Analysis of Y Chromosome STR and SNP in Population of Changshu [PDF]

open access: yes, 2020
Objective To provide a theoretical basis for building a Y chromosome database in specific regions by analyzing the pedigree specific core haplogroup and region specific genetic structure in Changshu.
TANG Xiao, TIAN Jun-zhe, ZHANG Yi-wei, et al
core   +1 more source

Filling knowledge gaps in a threatened shorebird flyway through satellite tracking

open access: yesJournal of Applied Ecology, Volume 56, Issue 10, Page 2305-2315, October 2019., 2019
Satellite tracking highlighted coastal habitats that are potentially important for shorebirds but lack ecological information and conservation recognition, such as those in Southern China and Southeast Asia. At the same time, the distributional data of tracked individuals can direct on‐ground surveys at the lesser known sites to collect information on ...
Ying‐Chi Chan   +8 more
wiley   +1 more source

中越、中老跨国境民族研究 [PDF]

open access: yes, 2006
departmental bulletin ...
4676, 范, 宏贵
core   +1 more source

基于公民科学数据分析环志水鸟迁徙连接——以广西北部湾沿海地区为例

open access: yes野生动物学报, 2023
广西北部湾沿海地区为东亚—澳大利西亚候鸟迁徙通道上的重要迁徙停歇地。基于公民科学数据,分析广西北部湾沿海地区记录到的异地环志水鸟与其越冬地、繁殖地及其他停歇地的迁徙连接。结果表明:2020年1月—2021年12月,广西北部湾沿海地区记录到澳大利亚塔斯马尼亚州、俄罗斯楚科奇及中国江苏等11个地点环志的10种水鸟,共计38只,其中,记录到数量较多的种类有勺嘴鹬(Calidris pygmaea)、铁嘴沙鸻(Charadrius leschenaultii)和大凤头燕鸥(Thalasseus bergii ...
易春凤, 张卫, 蒋爱伍
doaj  

藏以致用,以技证道——基于关联数据的家谱知识库 [PDF]

open access: yes, 2015
作者单位:上海图书馆内容提要:1、从用户需求出发;2、面向数字人文;3、基于BIBFRAME;4、基于语义技术;5 ...
夏翠娟
core  

On the normative roles of biodiversity and naturalness in conservation

open access: yesConservation Biology, EarlyView.
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

“同源”与“一家”——林惠祥、徐松石“环南中国海”古代民族关系研究的时代意义 [PDF]

open access: yes, 2018
林惠祥、徐松石于20世纪30年代几乎同时提出环南中国海区域\"中马同源\"与\"壮泰一家\"的学术观点,本文简述了相关研究的主要内容,分析了其方法论特色。运用知识社会学与知识谱系学的方法,本文展示了学者的研究取向与其自身家庭出身、求学经历、人生境遇、大时代背景以及世界学术潮流的密切关系。林惠祥、徐松石的学术思想在后世的\"南岛语族\"和\"壮泰比较\"研究中得到继承与发扬。本文认为,这种研究传统在今天仍具有重建区域共同体历史记忆的价值。国家留学基金资助,并为中央高校基本科研业务费项目 ...
杜树海
core  

Agricultural Lands as Important Wintering Habitats for the Critically Endangered Yellow‐Breasted Bunting in Nepal 尼泊尔农业用地作为极危黄胸鹀的重要越冬栖息地

open access: yesIntegrative Conservation, Volume 4, Issue 2, Page 134-142, June 2025.
Our study addresses the significant knowledge gap regarding the wintering population and habitat utilization of the Yellow‐breasted Bunting (Emberiza aureola) in Nepal, providing crucial insights that can aid in the conservation of this critically endangered species in wintering grounds.
Hem Bahadur Katuwal   +6 more
wiley   +1 more source

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