Results 51 to 60 of about 20,004 (173)

Effects of landscape context on avian specialist response to increased surface temperature in protected areas

open access: yesConservation Biology, EarlyView.
Abstract Human development is a driver of global change and a major threat to biodiversity. Protected areas maintain and support biodiversity, but outside stressors, such as climate change and land use change, can negatively influence natural resources within protected areas.
Leah J. Rudge   +2 more
wiley   +1 more source

科尔沁沙地草地退化过程中的物种组成及功能多样性变化特征

open access: yesShuitu Baochi Xuebao, 2006
科尔沁沙地草地退化、沙漠化过程存在着疏林草地、沙质草场、半流动沙地和流动沙地等明显的逆行演替阶段,并且不同的阶段对应着适合本生境的典型群落类型,每一群落优势种的作用明显。草地退化过程中,原生地带性群落及演替早期群落物种丰富、多样性高.结构复杂,随着草地退化、沙漠化过程,群落组成物种数、科属减少.禾本科植物衰退,物种多样性降低,草地群落结构趋于简单、质量下降。在退化的各个阶段,一年生、二年生和旱生植物功能群在各个阶段始终保持着较高的优势地位.对群落生态功能的发挥和维持起着重要作用 ...
左小安   +5 more
doaj   +2 more sources

Bacteriophage and Fusidic Acid Have Synergistic Effect Against Meticillin‐Resistant Staphylococcus pseudintermedius in Ex Vivo Canine Dermis Model

open access: yesVeterinary Dermatology, EarlyView.
Background: Antimicrobial stewardship has become vital given the progressive emergence of multidrug‐resistant bacteria, and novel approaches to the treatment of bacterial infections are needed. Recently, reported synergistic effects of antibacterial drugs and bacteriophage therapy have revealed promising applications for the management of meticillin ...
Sarah Ehling   +9 more
wiley   +1 more source

濒危野生动植物种国际贸易公约简介

open access: yes野生动物学报, 1987
Cl TES是《濒危野生动植物种国际贸易公约》缩写,于1973年制定。1975年后公约组织变为一支不可忽视的力量,现在已有九十多个成员国。这些国家齐心协力采取共同行动,杜绝进行任何列入濒危物种名单内动植物的商业贸易,并控制和管理其它一些可能会成为濒危物种的国际交易。 Cl TES的目标也是《世界自然保护大纲》(World Conservatiou Strategy)的重要组成部分。这个大纲是由联合国环境规划署(UNEP ...
范志勇
doaj  

A study on the Construction of Forest Campus of Xiamen University [PDF]

open access: yes, 2013
自21世纪以来,人类在对全球生态环境的危机反思中,萌生了对生态环境建设的责任感和自觉性。随着城市化进程的加快,以解决环境问题为出发点的森林化城市建设已逐渐成为各国政府和市民公众的共识,而森林化城市建设的首要途径即运用乡土树种建造城市森林。大学校园以其具有面积大、人口密度高等特点在城市生态系统诸多子系统中具有典型性,研究大学校园森林化对实现森林化城市建设有重要的理论和实践意义。 通过对厦门本地植物群落的调查,建立《厦门本地植物群落的植物名录》;运用层次分析法分析评价了校园18个植物景观 ...
姜秋怡
core  

Assessing D‐Squame as a Minimally Invasive Technique to Evaluate the Cutaneous Immune Response mRNA in a Dog Model of Canine Atopic Dermatitis

open access: yesVeterinary Dermatology, EarlyView.
ABSTRACT Background Canine atopic dermatitis (cAD) is a multifactorial, inherited skin disease, estimated to affect ≤ 15% of dogs. Studies of skin messenger mRNA in cAD currently use invasive methods, including blood sampling and biopsy collection, whilst advances in human atopic dermatitis study methodology have demonstrated reliable use of minimally ...
Xavier Langon   +5 more
wiley   +1 more source

甘肃民勤治沙站小鸮食物研究

open access: yes野生动物学报, 1993
分析小鸮(Athene noctua)呕出的食物残渣团块456块,包括啮齿类6种,鸟类1种,蜥蜴2属,甲虫5种,另有植物果实。食物组成说明小鸮是全昼夜捕食鸟类。
刘乃发
doaj  

Colonization dynamics of periphytic diatoms in coastal water of Qingdao, northern China [PDF]

open access: yes, 2016
本研究旨在研究青岛近岸周丛硅藻群集过程的动力学特征。采样地点为青岛奥林匹克帆船中心,采样方法为悬挂载玻片人工基质法。在2014年的5月至6月进行为期一个月的预实验以确定采样策略。结果表明,在设定的1米和3米采样水层,尽管周丛硅藻群落结构相似,但1米水层的物种数高于3米水层。在整个周丛硅藻群集阶段,分类学多样性指数表明了两水层有高度的差异性(差异系数>10%),分类学差异指数、平均分类学差异指数和分类学差异变异指数表明在群集7天以后周丛硅藻群落具有了较高的相似性(差异系数The temporal ...
杨中文
core  

From Douyin Shop to TikTok Shop: The Platformized Supply Chain, Spatialized Business Model, and Regional Partnership in Cross‐Border e‐Commerce

open access: yesPolicy &Internet, Volume 18, Issue 1, March 2026.
ABSTRACT This article investigates how TikTok Shop reproduces the e‐commerce model of Douyin Shop against a backdrop of divergent regulatory challenges and geopolitical distrust. One of the strategic changes we observe in TikTok Shop is the shift of consumer goods suppliers from local merchants to China‐based sellers.
Shuaishuai Wang, Jing Meng, Yitong Li
wiley   +1 more source

三种圈养金丝猴肠道微生物组差异分析

open access: yes野生动物学报, 2023
川、滇、黔金丝猴(Rhinopithecus roxellana、Rh.bieti、Rh.brelichi)均为我国特有种,国家一级重点野生保护动物。作为典型的食叶动物,其肠道微生物组特性研究也备受学者关注。为探究川、滇、黔金丝猴肠道微生物组结构,促进金丝猴胃肠道健康及为相关疾病防控提供参考数据,以北京动物园管理处圈养的3种7只金丝猴为研究对象,采用16S rDNA测序及分析技术,开展相同圈养环境下3种金丝猴肠道微生物组差异研究。结果显示:圈养健康金丝猴肠道微生物组的优势菌门为厚壁菌门 ...
张媛媛   +7 more
doaj  

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