全文获取类型
收费全文 | 60篇 |
免费 | 0篇 |
专业分类
安全科学 | 6篇 |
废物处理 | 1篇 |
环保管理 | 21篇 |
综合类 | 10篇 |
基础理论 | 5篇 |
环境理论 | 1篇 |
污染及防治 | 8篇 |
评价与监测 | 4篇 |
社会与环境 | 4篇 |
出版年
2020年 | 1篇 |
2019年 | 1篇 |
2018年 | 1篇 |
2017年 | 5篇 |
2016年 | 3篇 |
2015年 | 3篇 |
2013年 | 6篇 |
2012年 | 5篇 |
2011年 | 3篇 |
2010年 | 3篇 |
2008年 | 1篇 |
2007年 | 5篇 |
2006年 | 4篇 |
2005年 | 4篇 |
2004年 | 1篇 |
2003年 | 2篇 |
2002年 | 1篇 |
2000年 | 1篇 |
1999年 | 2篇 |
1995年 | 1篇 |
1992年 | 1篇 |
1991年 | 1篇 |
1990年 | 1篇 |
1989年 | 1篇 |
1988年 | 1篇 |
1987年 | 1篇 |
1977年 | 1篇 |
排序方式: 共有60条查询结果,搜索用时 31 毫秒
1.
2.
In the case-control study of 118 women with autosomal trisomy identified at prenatal diagnosis and their 442 karyotypically normal matched controls, we found that there was no overall association between risk of trisomy and the presence of vaginal bleeding during pregnancy. However, a lengthy duration of bleeding appears to predict increased risk of trisorny. 相似文献
3.
Joshua Eli Cinner Morgan Stuart Pratchett Nicholas Anthony James Graham Vanessa Messmer Mariana Menezes Prata Bezerra Fuentes Tracy Ainsworth Natalie Ban Line Kolind Bay Jessica Blythe Delphine Dissard Simon Dunn Louisa Evans Michael Fabinyi Pedro Fidelman Joana Figueiredo Ashley John Frisch Christopher John Fulton Christina Chemtai Hicks Vimoksalehi Lukoschek Jennie Mallela Aurelie Moya Lucie Penin Jodie Lynn Rummer Stefan Walker David Hall Williamson 《Regional Environmental Change》2016,16(4):1133-1146
Corals and coral-associated species are highly vulnerable to the emerging effects of global climate change. The widespread degradation of coral reefs, which will be accelerated by climate change, jeopardizes the goods and services that tropical nations derive from reef ecosystems. However, climate change impacts to reef social–ecological systems can also be bi-directional. For example, some climate impacts, such as storms and sea level rise, can directly impact societies, with repercussions for how they interact with the environment. This study identifies the multiple impact pathways within coral reef social–ecological systems arising from four key climatic drivers: increased sea surface temperature, severe tropical storms, sea level rise and ocean acidification. We develop a novel framework for investigating climate change impacts in social–ecological systems, which helps to highlight the diverse impacts that must be considered in order to develop a more complete understanding of the impacts of climate change, as well as developing appropriate management actions to mitigate climate change impacts on coral reef and people. 相似文献
4.
Kerns Becky K. Kim John B. Kline Jeffrey D. Day Michelle A. 《Regional Environmental Change》2016,16(7):2129-2140
Regional Environmental Change - We examined landscape exposure to wildfire potential, insects and disease risk, and urban and exurban development for the conterminous US (CONUS). Our analysis... 相似文献
5.
Agnes M. L. Karlson Jon Duberg Nisha H. Motwani Hedvig Hogfors Isabell Klawonn Helle Ploug Jennie Barthel Svedén Andrius Garbaras Brita Sundelin Susanna Hajdu Ulf Larsson Ragnar Elmgren Elena Gorokhova 《Ambio》2015,44(3):413-426
Filamentous, nitrogen-fixing cyanobacteria form extensive summer blooms in the Baltic Sea. Their ability to fix dissolved N2 allows cyanobacteria to circumvent the general summer nitrogen limitation, while also generating a supply of novel bioavailable nitrogen for the food web. However, the fate of the nitrogen fixed by cyanobacteria remains unresolved, as does its importance for secondary production in the Baltic Sea. Here, we synthesize recent experimental and field studies providing strong empirical evidence that cyanobacterial nitrogen is efficiently assimilated and transferred in Baltic food webs via two major pathways: directly by grazing on fresh or decaying cyanobacteria and indirectly through the uptake by other phytoplankton and microbes of bioavailable nitrogen exuded from cyanobacterial cells. This information is an essential step toward guiding nutrient management to minimize noxious blooms without overly reducing secondary production, and ultimately most probably fish production in the Baltic Sea. 相似文献
6.
Anna Maria J?nsson Olle Anderbrant Jennie Holmér Jacob Johansson Guy Schurgers Glenn P. Svensson Henrik G. Smith 《Ambio》2015,44(3):249-255
In recent years, climate impact assessments of relevance to the agricultural and forestry sectors have received considerable attention. Current ecosystem models commonly capture the effect of a warmer climate on biomass production, but they rarely sufficiently capture potential losses caused by pests, pathogens and extreme weather events. In addition, alternative management regimes may not be integrated in the models. A way to improve the quality of climate impact assessments is to increase the science–stakeholder collaboration, and in a two-way dialog link empirical experience and impact modelling with policy and strategies for sustainable management. In this paper we give a brief overview of different ecosystem modelling methods, discuss how to include ecological and management aspects, and highlight the importance of science–stakeholder communication. By this, we hope to stimulate a discussion among the science–stakeholder communities on how to quantify the potential for climate change adaptation by improving the realism in the models. 相似文献
7.
Forest policymakers, public lands managers, and scientists in the Pacific Northwest (USA) seek ways to evaluate the landscape-level
effects of policies and management through the multidisciplinary development and application of spatially explicit methods
and models. The Interagency Mapping and Analysis Project (IMAP) is an ongoing effort to generate landscape-wide vegetation
data and models to evaluate the integrated effects of disturbances and management activities on natural resource conditions
in Oregon and Washington (USA). In this initial analysis, we characterized the spatial distribution of forest and range land
development in a four-county pilot study region in central Oregon. The empirical model describes the spatial distribution
of buildings and new building construction as a function of population growth, existing development, topography, land-use
zoning, and other factors. We used the model to create geographic information system maps of likely future development based
on human population projections to inform complementary landscape analyses underway involving vegetation, habitat, and wildfire
interactions. In an example application, we use the model and resulting maps to show the potential impacts of future forest
and range land development on mule deer (Odocoileus hemionus) winter range. Results indicate significant development encroachment and habitat loss already in 2000 with development located
along key migration routes and increasing through the projection period to 2040. The example application illustrates a simple
way for policymakers and public lands managers to combine existing data and preliminary model outputs to begin to consider
the potential effects of development on future landscape conditions. 相似文献
8.
Damon M. Hall Andrea Feldpausch-Parker Tarla Rai Peterson Jennie C. Stephens Elizabeth J. Wilson 《Sustainability Science》2017,12(3):381-392
Sustainability science is a solution-oriented discipline. Yet, there are few theory-rich discussions about how this orientation structures the efforts of sustainability science. We argue that Niklas Luhmann’s social system theory, which explains how societies communicate problems, conceptualize solutions, and identify pathways towards implementation of solutions, is valuable in explaining the general structure of sustainability science. From Luhmann, we focus on two key concepts. First, his notion of resonance offers us a way to account for how sustainability science has attended and responded to environmental risks. As a product of resonance, we reveal solution-oriented research as the strategic coordination of capacities, resources, and information. Second, Luhmann’s interests in self-organizing processes explain how sustainability science can simultaneously advance multiple innovations. The value logic that supports this multiplicity of self-organizing activities as a recognition that human and natural systems are complex coupled and mutually influencing. To give form to this theoretical framework, we offer case evidence of renewable energy policy formation in Texas. Although the state’s wealth is rooted in a fossil-fuel heritage, Texas generates more electricity from wind than any US state. It is politically antagonistic towards climate-change policy, yet the state’s reception of wind energy technology illustrates how social and environmental systems can be strategically aligned to generate solutions that address diverse needs simultaneously. This case demonstrates that isolating climate change—as politicians do as a separate and discrete problem—is incapable of achieving sustainable solutions, and resonance offers researchers a framework for conceptualizing, designing, and communicating meaningfully integrated actions. 相似文献
9.
Kathy S. Law Anke Roiger Jennie L. Thomas Louis Marelle Jean-Christophe Raut Stig Dalsøren Jan Fuglestvedt Paolo Tuccella Bernadett Weinzierl Hans Schlager 《Ambio》2017,46(3):453-463
Local emissions of Arctic air pollutants and their impacts on climate, ecosystems and health are poorly understood. Future increases due to Arctic warming or economic drivers may put additional pressures on the fragile Arctic environment already affected by mid-latitude air pollution. Aircraft data were collected, for the first time, downwind of shipping and petroleum extraction facilities in the European Arctic. Data analysis reveals discrepancies compared to commonly used emission inventories, highlighting missing emissions (e.g. drilling rigs) and the intermittent nature of certain emissions (e.g. flaring, shipping). Present-day shipping/petroleum extraction emissions already appear to be impacting pollutant (ozone, aerosols) levels along the Norwegian coast and are estimated to cool and warm the Arctic climate, respectively. Future increases in shipping may lead to short-term (long-term) warming (cooling) due to reduced sulphur (CO2) emissions, and be detrimental to regional air quality (ozone). Further quantification of local Arctic emission impacts is needed. 相似文献
10.
A. David Kline 《Journal of Agricultural and Environmental Ethics》1995,8(2):190-197
The focus of the paper is the ethical issues associated with the practice of dissecting animals in lower level college biology classes. Several arguments against dissection are explored. Furthermore, the issue is examined from the point of view of the instructor's academic freedom and the point of view of a student's moral autonomy. It is argued that even though the arguments against dissection fail, it is very important to respect the moral autonomy of students who oppose the practice. Often this can be accomplished in a manner that is consistent with academic freedom and good science education. 相似文献