Results 41 to 50 of about 8,476 (172)

污水处理厂中浮游生物群落DNA指纹及其与水质指标的关系 [PDF]

open access: yes, 2008
以武汉龙王嘴污水处理系统为研究对象,揭示了污水处理各阶段中浮游生物群落的DNA指纹拓扑结构,进而探索了其与浮游生物群落结构和环境理化因子的关系.首先建立了污水处理系统中浮游生物群落总DNA提取方法,然后用原核与真核特异性引物对流程(A2/O氧化沟工艺)中不同阶段的浮游生物群落总DNA进行PCR扩增,用变性梯度凝胶电泳(DGGE)检测,并对平行水样分别进行常规理化因子和浮游生物物种的检测与鉴定.结果显示,各采样点理化因子、物种组成与浮游生物DNA指纹的统计分析结果十分吻合,厌氧、缺氧和好氧阶段间差异较小,
余育和   +4 more
core  

Perceived costs as drivers of wildlife management preferences in rural Tanzanian communities

open access: yesConservation Biology, EarlyView.
Abstract Effectively managing human–wildlife interactions is crucial for fostering coexistence on shared landscapes. Management options are most effective when aligned with the preferences of people directly affected by wildlife, yet little is known about how socioecological factors influence these preferences.
Christian Kiffner   +10 more
wiley   +1 more source

燕山北部板栗林下杂草群落动态及生态位研究

open access: yesShuitu Baochi Xuebao, 2022
为准确掌握燕山北部板栗园杂草的发生现状及群落组成,分别于2017年、2018年、2020年对燕山北部板栗林下杂草的种类、数量等进行调查,并运用Levins生态位指数和Pianka生态位重叠指数分析板栗林下优势杂草的生态位动态及群落对资源的利用情况和种间竞争情况。结果表明:(1)2017年、2018年、2020年燕山北部板栗林下杂草群落中分别有53种(27科48属)、47种(24科43属)和44种(24科41属)植物。其中优势杂草15种。(2)15种优势杂草中,葎草和灰绿藜占据较宽的生态位 ...
李娟, 张昱
doaj   +2 more sources

Drivers of bat researchers’ intent to adopt field hygiene practices

open access: yesConservation Biology, EarlyView.
Abstract Infectious disease is a growing threat to wildlife, with zoonotic transmission most likely at the human–wildlife interface. One underappreciated activity at this interface is fieldwork with wild animals, but associated risks can be mitigated through field hygiene (FH) practices, such as using personal protective equipment and other appropriate
Joanna L. Coleman   +6 more
wiley   +1 more source

欧州各国对狍的研究现状

open access: yes野生动物学报, 1986
狍(Capreolus capreolus)是鹿科动物,分布在整个欧亚大陆的中部、北部,数量很大,是一种重要的狩猎动物。欧洲各国对狍进行了大量的研究,较集中地研究了狍的种群数量、结构、动态、狍的集群、活动型、食物组成和采食习惯 ...
刘永年
doaj  

Study on Bioactivity of Endophytic Fungi from Mangrove Plants and Secondary Metabolites Produced by Fungus A-1-2-3 [PDF]

open access: yes, 2006
近年来,随着研究热点的转移,新药的研究开发已突破了陆生资源的束缚,拓展到了生态和物种远比陆地生境复杂多样的海洋。红树植物生长于海岸潮间带,其独特的生存环境赋予它丰富的微生物资源,是当前倍受重视的药用新资源。本文对福建省九龙江口浮宫镇草埔头红树林区木榄(Bruguieragymnorrhiza)和秋茄(Kandeliacandel)2种红树植物的内生真菌资源进行为期1年的种群动态调查并对这些菌株的抗菌、抗肿瘤、乙酰胆碱酯酶及胰蛋白酶抑制剂活性进行了初步研究。对活性菌株A-1-2 ...
杨丽姗
core  

Advancing conservation breeding programs for marine invertebrates

open access: yesConservation Biology, EarlyView.
Abstract In the face of ecosystem change and biodiversity loss caused by climate change and other stressors, conservation breeding, or captive breeding, with the aim of reintroduction for wild population recovery, is an emerging tool for preventing species’ extinction and rehabilitating ecosystems.
Elora H. López‐Nandam   +3 more
wiley   +1 more source

微卫星标记方法在大型猫科动物保护群遗传学研究中的应用与挑战

open access: yes野生动物学报, 2019
大型猫科动物是顶级捕食者,它的存在依赖该地区的整个生态系统,也可以对整个地区的生态系统直接或间接产生强烈的影响。种群遗传学是保护遗传学的一个重要组成部分,对于野外种群来通过种群遗传学研究能了解种群的遗传多样性,种群大小,遗传结构等诸多信息。微卫星标记方法结合非损伤性取样方法在野生大型猫科动物保护遗传学的研究中有着重要地位,它具有诸多优点,广泛应用于种群遗传多样性、个体识别、亲缘关系鉴定等方面的研究。本文回顾大型猫科动物与微卫星标记方法的应用,虽然目前微卫星标记方法仍然具有一定的局限性,但是随着技术的发展,
王萌 1 朱思雨 2 薛茂盛 3 刘霖 3 任迎丰 3 李立新 3 许青 1 姜广顺 1
doaj  

Investigation on population dynamics of Fejervarya multistriata in plantations of Fujian Province, eastern China. [PDF]

open access: yes, 2013
2011年6—9月和2012年4—5月,采用“围栏陷阱法“对福建省将乐县国有林场典型人工林内泽陆蛙种群进行调查,共捕获泽陆蛙222只。采用聚类分析方法,按照体长、体重将泽陆蛙划分为成体和亚成体,分析不同月份、不同类型人工林、不同林龄人工林内泽陆蛙的日均捕获量、肥满度和重长比的变化规律。结果显示:1)人工林泽陆蛙日均捕获量随月份变化先减小后增大,肥满度无显著变化,重长比先增大后减小。2)人工林泽陆蛙肥满度、重长比,混交林高于纯林;日均捕获量纯林高于混交林。3)随人工林林龄的增加泽陆蛙肥满度、重长比增大 ...
李劭抒   +4 more
core  

Taxonomic and functional diversity of urban bees of the world

open access: yesConservation Biology, EarlyView.
Abstract Bees play a pivotal role in terrestrial environments. Urbanization can affect these organisms and the ecosystem services they provide. However, knowledge of the global diversity of urban bees is limited. Thus, we summarized data on urban bee species identities and occurrences; compared distributions of all bees with those found in urban ...
João C. F. Cardoso   +10 more
wiley   +1 more source

Home - About - Disclaimer - Privacy