Results 21 to 30 of about 41,530 (238)

浙江长兴扬子鳄种群遗传多样性研究

open access: yes野生动物学报, 2022
为有效保护浙江长兴尹家边扬子鳄保护区扬子鳄(Alligator sinensis)种群,丰富野放扬子鳄的遗传多样性,利用13个微卫星标记分析了该种群的遗传多样性,比较核心区和野放区种群的遗传多样性差异。结果显示:保护区扬子鳄种群共检测到31个等位基因,其中含2个稀有等位基因。野放区种群的平均有效等位基因数量(1.82)、平均观测杂合度(0.49)、平均期望杂合度(0.43)、平均多态信息含量(0.34)和平均香农信息指数(0.64)均低于核心区(1.89、0.52、0.46、0.37和0.70 ...
方黎明   +8 more
doaj  

Distribution Pattern of Taxonomic Diversity of Fish Community in Four Typical Mangrove Areas, China [PDF]

open access: yes, 2016
红树林区不仅能为许多海生和陆生生物提供栖息地和食物,还是许多鱼类的育幼场和产卵场,因此红树林区生物多样性成为当今生态学研究热点之一。过去对红树林区鱼类群落的研究多采用传统生物多样性指数,然而传统生物多样性指数在实际运用过程具有过多注重物种丰富度、未考虑物种在分类学上的差异等缺陷。分类多样性指数既考虑了群落中物种数量和均匀程度,也考虑了物种分类地位和生态学上的差异,更全面更有说服力。 为全面了解中国红树林区鱼类物种多样性分布格局,本研究选取福建漳江口、广西茅尾海、广西山口、海南东寨港四个典型的红树林区 ...
陈杰
core  

Root economic space is associated with rhizosphere microbial divergence via root metabolite‐mediated pathways in degraded grasslands

open access: yesFunctional Ecology, EarlyView.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Grasslands worldwide are experiencing severe degradation due to overgrazing, climate change and anthropogenic disturbances, resulting in substantial declines in biodiversity and ecosystem functioning.
Xiaoqi Wang   +5 more
wiley   +1 more source

Biodiversity conservation needs more research

open access: yesGuangxi Zhiwu, 2023
联合国《生物多样性公约》第十五次缔约方大会(以下简称COP15)通过了《昆明-蒙特利尔全球生物多样性框架》(以下简称《昆蒙框架》),包括4个长期目标和23个行动目标(马克平,2023),为全球2030年前应对生物多样性丧失问题明确了目标和路径。近年来,中国实施了一系列生态文明建设的举措,包括国土空间规划、生态保护红线划定和管控、以国家公园为主体的自然保护地体系的建设等,率先实现了《昆蒙框架》中关于通过全域空间规划实现生物多样性主流化(行动目标1)、保护30%陆地面积(行动目标3)等重要目标,为国际社会 ...
Keping MA, Hai REN, Chunlin LONG
doaj   +1 more source

Flexible parental care in a songbird correlates with sex‐specific responses to seasonal phenology, mating opportunity and reproductive success

open access: yesJournal of Animal Ecology, EarlyView.
This population‐comparative study reveals that male and female parents respond differently to social and ecological conditions. This sex‐specific responsive strategy is related to the incongruent parental care systems across populations in Chinese penduline tits.
Jia Zheng   +5 more
wiley   +1 more source

Genetic diversity on the Genus Skeletonema (Bacillariophyceae) in the coastal waters of China [PDF]

open access: yes, 2015
骨条藻(Skeletonema)是一类广泛分布于沿海水域的浮游硅藻,也是常见的赤潮生物。目前,对于整个中国沿海骨条藻的分类和分子生物学方面的研究,比较分散,还不能很好地回答我国沿海骨条藻的种类多样性和遗传多样性的问题。因此,本文选择我国沿海的代表性海区,进行周年采样,对分离培养的纯种株系,选择核糖体LSUnrDNA和ITS片段(5.8SrDNA及转录间隔区ITS1、ITS2)对其进行遗传多样性及系统进化分析,旨在从分子生物学方面分析我国沿海骨条藻属的种内、种间和地理株系间的差异,以及系统进化关系 ...
王琰
core  

Rapid construction of insect–plant interaction networks via multiplexed long‐fragment DNA metabarcoding and NGS

open access: yesMethods in Ecology and Evolution, EarlyView.
Abstract Molecular identification of insect food webs can accurately reveal complex trophic interactions and serve as a foundation for understanding ecosystem functioning and advancing biodiversity conservation. This process typically involves DNA library construction, high‐throughput sequencing and subsequent steps, including data assembly, annotation,
Xiao‐man Zhang   +9 more
wiley   +1 more source

An Integrated Research on Marine Biodiversity Conservation at the core of Regional Ocean Governance [PDF]

open access: yes, 2016
海洋生态系统是人类赖以生存和发展的重要物质和文化基础。随着人类社会经济活动的范围和强度不断拓展和加深,全球海洋生物多样性及其持续向人类提供生态系统服务的功能面临着日益严峻的破坏和威胁。如何加强和完善海洋生态系统养护和管理,实现海洋生物多样性可持续保护和发展,是全球共同面临的重要课题,同时也考验着人类在自然-社会生态系统互动中形成怎样的关系和响应策略问题。海洋生物多样性保护作为人类共同关切事项所具有的公共产品属性要求全球、区域和国家多层面采取集体行动来共同应对。在此背景下 ...
姜玉环
core  

Effects of parachute science on local research capacity 降落伞科学对当地研究能力的影响

open access: yesConservation Biology, EarlyView.
Abstract Strengthening research capacity is essential to address the global biodiversity crisis. Yet, parachute science often undermines this goal, and its prevalence, costs, and benefits are unclear. We analyzed 13,502 publications on primate research that we extracted from Scopus (1960–2022) to evaluate the effects of parachute science on local ...
Li Yang   +11 more
wiley   +1 more source

阿尔泰山布尔津林区不同草地类型物种多样性特征与生产力的关系

open access: yesShuitu Baochi Xuebao, 2022
为探讨物种多样性与地上生物量的相关性以及物种多样性的垂直变化特征。以阿尔泰山布尔津林区5种草地类型为研究对象, 通过对布尔津林区各草地类型的调查, 分析了阿尔泰山布尔津林区各草地类型的物种多样性变化特征。结果表明: (1)5个草地群落类型地上生物量差异明显, 荒漠草原和山地草甸草原较低, 山地草原最高, 而山地草甸和高寒草甸处于两者之间。(2)各草地类型群落间的物种多样性指数、优势度指数、丰富度指数和均匀度指数有明显差异, 高寒草甸的物种优势度、多样性和均匀度的情况最好 ...
殷锡凯   +4 more
doaj  

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