Results 81 to 90 of about 59,300 (233)
Scenarios and strategies for future‐proofing ecosystem management under climatic novelty
Conservation Biology, EarlyView.Abstract Climate change is driving unprecedented declines in dominant, habitat‐forming foundation species across marine and terrestrial ecosystems globally. As climatic novelty becomes the norm, ecosystem reassembly will become increasingly common. Predicting and understanding these transitions, and their implications for future ecosystem functioning ...
Lauren T. Toth +14 more
wiley +1 more source
Distributions of Nitrous Oxide and its Influence Factors in the Bering Sea, Western Arctic Ocean and Nordic Sea [PDF]
, 2015 氧化亚氮（Nitrousoxide，N2O）是大气中重要的温室气体，也是破坏臭氧层的化学物质之一，海洋是大气中N2O重要源。随着气候变暖效应的增强，海洋系统发生一系列变化，如：海表温度上升、海冰减少、海平面上升以及海洋酸化等现象。北冰洋是地球系统的重要组成部分，对气候变化的响应和反馈具有放大作用，在北极海域开展N2O温室气体的研究，可揭示北冰洋在全球N2O循环过程中扮演的重要角色。本研究于中国第五次北极科学考察期间，利用静态顶空分析方法，首次对白令海、西北冰洋及北欧海N2O的分布特征及影响因素进行研究 ...
张介霞
core
Drivers of bat researchers’ intent to adopt field hygiene practices
Conservation 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
Metal Bioaccumulation and its Mechanisms in Oysters of Jiulong River Estuary Impacted by Wastewater Discharge [PDF]
, 2016 重金属污染在河口环境中普遍存在，导致生物资源的衰退，影响生态系统的功能。本研究在九龙江口受排污影响水域设定3个站位，以香港牡蛎为研究对象，通过48d的移植实验，研究在高度动态的受污染河口中，重金属的生物累积和亚细胞分布。实验中，同步采集水样，测定溶解态、颗粒态重金属浓度，研究重金属的颗粒分配行为。同时运用梯度薄膜渗透（DGT）技术测定的有效态金属浓度进行对比。 通过测定重金属的溶解态及颗粒态浓度，发现Cr、Ni、Cu、Zn是所研究水域主要的重金属污染物。溶解态浓度平均值分别为9.39μgCr/L，34 ...
周炜韬
core
Advancing conservation breeding programs for marine invertebrates
Conservation 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
Regulatory compliance and support for altered management of the exotic pet trade
Conservation Biology, EarlyView.Abstract Globally, the exotic pet trade has contributed to species invasion, disease, and animal welfare risks. Although scientists have advocated for increased trade regulation, the success of management and regulatory efforts depends on compliance by participants in the exotic pet trade. We used a regulatory compliance framework to investigate exotic
Elizabeth N. Pratt +3 more
wiley +1 more source
Shuitu Baochi Xuebao, 2017 针对湖北通城花岗岩崩岗区发育的淋溶层（A层）、淀积层（B层）、过渡层(BC层)以及母质层(C层)，采用不同坡度(8.8％，17.6％，26.8％，36.4％，46.6％)和不同流量(0.2，1.0 L/s)相结合的室内放水冲刷试验，分析崩岗各层次土壤的抗冲性指数，初步探讨花岗岩崩岗不同坡度及各层次土壤主要理化性质对抗冲性的影响。结果表明：⑴湖北通城县崩岗土壤A层、B层、BC层以及C层的理化性质存在较大差异。⑵当流量一定时，随着坡度的增大，土壤的抗冲性指数均表现为减小的趋势；当坡度一定时 ...
徐加盼 +5 more
doaj
Empirical Research of Informed Trading DY-PIN Model Based on Hierarchical Clustering Method [PDF]
, 2016 知情交易的研究是金融市场微观理论的一个重要组成部分。在证券交易当中，知情交易体现为一种信息不对称行为，从风险管理角度上看，度量知情交易被看作是对信息风险的度量。在以往的文献中，学者通过构建符合市场交易特征的微观理论模型来从交易数据中挖掘和度量知情交易。信息风险度量的意义在于提供了观测金融市场风险的新信息，这些新信息有利于提前发现市场的整体风险状况和维护金融市场的合理运行，信息风险的度量同时为风险监管带来了新的要求，促进金融市场制度设计的完善。对于投资者来说 ...
朱振宇
core
Taxonomic and functional diversity of urban bees of the world
Conservation 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
Using customs data to understand overlooked trade in non‐CITES birds between Africa and Asia
Conservation Biology, EarlyView.Abstract The international trade in live birds poses risks to animals, people, and biodiversity. To effectively mitigate these risks, decision‐makers require information on the volume, dynamics, and direction of trade. Despite Africa once being the largest exporter of birds by region, very little data exist on recent trade in live birds not listed on ...
Alisa Davies +4 more
wiley +1 more source