Results 121 to 130 of about 74,833 (278)

中国濒危野生生物栖息地法律保护多元性之缺失和完善——与美国濒危物种栖息地法律保护的比较

open access: yes野生动物学报, 2003
栖息地是指生物生活的空间和其中全部生态因子的总和,包括个体或群体生物生存所需要的非生物环境和其他生物。我国法律法规中对应用语是野生动物的生存环境或生息繁衍场所,以及野生植物的生长环境。1966年美国《濒危物种保存法》就提到 ...
王小钢
doaj  

不同品种、盐度及月份菊芋叶中绿原酸的含量测定 [PDF]

open access: yes, 2015
建立HPLC 法测定菊芋叶中绿原酸含量的方法,对菊芋植株中不同部位绿原酸的分布规律,以及不同品系、盐度、采摘时间等因素对菊芋叶中绿原酸含量的影响情况进行研究。方法:色谱柱为Hypersil BDS C-18(4.6×250 mm,5 μm),流速为1 mL min-1 ,检测波长为327 nm,进样量为10 μL,柱温为30℃,流动相为0.1%三氟乙酸水(A)-乙腈(B)。结果:菊芋叶中绿原酸的含量(3.40%)显著高于其他部位绿原酸的含量;10 ...
夏传海   +1 more
core  

Elevation, soil pH and calcium availability shape regional and local scale spatial patterns of PhoD gene abundance in tropical and subtropical forests

open access: yesFunctional Ecology, EarlyView.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Organic phosphorus mineralization is a critical process in the phosphorus cycle, governing phosphorus bioavailability for plants. The PhoD gene, which encodes the key enzyme alkaline phosphatase, serves as a valuable biomarker for this process.
Sandhya Mishra   +3 more
wiley   +1 more source

Parental care and bird embryonic metabolism: A comparison between uniparentally incubating Silver‐throated Tits and biparentally incubating Black‐throated Tits

open access: yesFunctional Ecology, EarlyView.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Studies have shown that organisms may adjust metabolic rates in response to thermal variability, highlighting metabolic plasticity as a key adaptive mechanism. Understanding the extent of metabolic plasticity of an organism is key to predicting its adaptation to climate
Qian Hu   +6 more
wiley   +1 more source

Functionally diverse stands promote leaf litter decomposition irrespective of litter species' resource acquisition strategy

open access: yesFunctional Ecology, EarlyView.
Read the free Plain Language Summary for this article on the Journal blog. Abstract Stand functional diversity (RaoQ) and stand functional composition in terms of the functional traits of the component species (CWM trait) are critical for ecosystem processes and functioning, such as litter decomposition and associated nutrient cycling.
Bai‐Yu Yang   +12 more
wiley   +1 more source

生态环境对鱼类繁殖的影响

open access: yes野生动物学报, 1997
生态环境对鱼类繁殖的影响于洪贤,马一丹,柴方营,徐文斌(东北林业大学哈尔滨150040)(黑龙江省水利厅)(哈尔滨市西郊渔场)鱼类是一群终生生活在水中的变温脊椎动物。其生活环境是水。不同的鱼类群生活在特定的水环境中,不同的水环境生活着不同的鱼类种群。...
于洪贤   +3 more
doaj  

贺兰山马麝冬季生境选择

open access: yes野生动物学报, 2020
2014—2016年在内蒙古贺兰山,采用样线法与样方法,对马麝(Moschus chrysogaster sifanicus)的冬季生境选择进行了研究。生境选择数据表明:贺兰山马麝在冬季对生境具有选择性。通过使用拟合优度卡方检验对3种非数值型的生态因子(植被类型、优势乔木、坡向)进行研究,分析数据得出:(1)在冬季贺兰山马麝对植被类型具有选择性 ...
孙 嘉 1 赵 唱 1   +3 more
doaj  

Diagnosing scaling bottlenecks in 10 community conservation initiatives in southern and eastern Africa

open access: yesConservation Biology, EarlyView.
Scaling area‐based conservation, including initiatives led or comanaged by Indigenous Peoples and local communities, is a flagship goal of the Kunming‐Montreal Global Biodiversity Framework. Conservationists often aspire to scale initiatives, but this is rarely achieved in practice. Identifying and addressing factors that limit initiative adoption (i.e.
Thomas Pienkowski   +39 more
wiley   +1 more source

完达山东部林区冬季东北兔的生境选择

open access: yes野生动物学报, 2009
2006~2008年的冬季,在黑龙江省完达山东部林区,利用布设样线的方法对东北兔生境选择进行了研究。通过生境选择指数分析表明,东北兔主要选择中坡位、阳坡、坡度小于25度、离人为干扰距离大于1000m的针阔混交林和灌丛生境;主成分分析表明,隐蔽条件、食物、温度和人为干扰是影响东北兔生境选择的主要生境因子。
任梦非, 黄海娇
doaj  

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