全文获取类型
收费全文 | 2277篇 |
免费 | 19篇 |
国内免费 | 28篇 |
专业分类
安全科学 | 57篇 |
废物处理 | 87篇 |
环保管理 | 259篇 |
综合类 | 486篇 |
基础理论 | 478篇 |
环境理论 | 1篇 |
污染及防治 | 682篇 |
评价与监测 | 127篇 |
社会与环境 | 128篇 |
灾害及防治 | 19篇 |
出版年
2023年 | 22篇 |
2022年 | 20篇 |
2021年 | 41篇 |
2020年 | 25篇 |
2019年 | 31篇 |
2018年 | 65篇 |
2017年 | 61篇 |
2016年 | 76篇 |
2015年 | 75篇 |
2014年 | 89篇 |
2013年 | 104篇 |
2012年 | 99篇 |
2011年 | 149篇 |
2010年 | 130篇 |
2009年 | 142篇 |
2008年 | 126篇 |
2007年 | 133篇 |
2006年 | 96篇 |
2005年 | 70篇 |
2004年 | 92篇 |
2003年 | 59篇 |
2002年 | 82篇 |
2001年 | 72篇 |
2000年 | 42篇 |
1999年 | 19篇 |
1998年 | 22篇 |
1997年 | 28篇 |
1996年 | 24篇 |
1995年 | 34篇 |
1994年 | 26篇 |
1993年 | 9篇 |
1992年 | 19篇 |
1991年 | 27篇 |
1990年 | 14篇 |
1989年 | 19篇 |
1988年 | 7篇 |
1985年 | 5篇 |
1984年 | 8篇 |
1982年 | 13篇 |
1981年 | 10篇 |
1980年 | 5篇 |
1979年 | 11篇 |
1970年 | 10篇 |
1968年 | 5篇 |
1967年 | 5篇 |
1966年 | 5篇 |
1965年 | 8篇 |
1964年 | 5篇 |
1960年 | 6篇 |
1956年 | 5篇 |
排序方式: 共有2324条查询结果,搜索用时 15 毫秒
991.
Emile van Lieshout 《Behavioral ecology and sociobiology》2011,65(2):149-156
Phenotypic variation in male genitalia may affect copulation behaviour, which can have important fitness consequences for
males. Male genitalia commonly possess traits that increase male control over copulation, but in species where females control
mating, a poor functional understanding often prevents insight into the processes responsible for such effects. Here, I investigate
the effect of male genital length on copulation behaviour in the earwig Euborellia brunneri, where both sexes exhibit extremely elongated genitalia that correspond in shape. This model system is particularly suitable
because pairs mate repeatedly and females can limit both the number and duration of copulations. I used both virgin and mated
males and females in a double-mating design because longer male genitalia confer benefits in sperm competition. Consistent
with a greater predicted male mating effort in mated females, the duration of individual copulations increased, but this traded
off against mating frequency as cumulative mating duration remained unchanged. In contrast, male genital length increased
both individual and cumulative mating duration, regardless of mating status. This difference suggests that, while males may
modify copulation duration in response to mating status, females facultatively adjust mating frequency to prevent mating excessively
or express preferences for increased male genital length. Notably, this study demonstrates that male genital phenotypes that
are successful in sperm competition also enjoy female-mediated mating benefits. 相似文献
992.
Recently it has come to our attention that a paper was published in this journal entitled “recycling greenhouse gas fossil
fuel emissions into low radiocarbon food products to reduce human genetic damage” (Williams in Environ Chem Lett 5:197–202,
2007). In this article, it is argued that food grown in a greenhouse is healthier for people, when the greenhouse is fertilised
with CO2 prepared from fossil fuels. In this comment, however, we argue that the effect on human health is completely negligible. 相似文献
993.
Bonmatin Jean-Marc Giorio Chiara Sánchez-Bayo Francisco Bijleveld van Lexmond Maarten 《Environmental science and pollution research international》2021,28(10):11709-11715
Environmental Science and Pollution Research - 相似文献
994.
Furlan Lorenzo Pozzebon Alberto Duso Carlo Simon-Delso Noa Sánchez-Bayo Francisco Marchand Patrice A. Codato Filippo Bijleveld van Lexmond Maarten Bonmatin Jean-Marc 《Environmental science and pollution research international》2021,28(10):11798-11820
Environmental Science and Pollution Research - Over-reliance on pesticides for pest control is inflicting serious damage to the environmental services that underpin agricultural productivity. The... 相似文献
995.
Romanelli João Paulo Gonçalves Maria Carolina Pereira de Abreu Pestana Luís Fernando Soares Jéssica Akemi Hitaka Boschi Raquel Stucchi Andrade Daniel Fernandes 《Environmental science and pollution research international》2021,28(43):60448-60458
Environmental Science and Pollution Research - The evidence base in environmental sciences is increasing steadily. Environmental researchers have been challenged to handle massive volumes of data... 相似文献
996.
Tom van der Voorn Jaco Quist Claudia Pahl-Wostl Marjolijn Haasnoot 《Mitigation and Adaptation Strategies for Global Change》2017,22(3):519-546
The paper reports on a comparative study of three different cases on vision and strategy development for climate change adaptation planning in (i) The South African Breede–Overberg Catchment, (ii) The Mississippi Estuary-New Orleans region and (iii) The Dutch Rhine-Meuse Estuary. The objective of the paper is twofold: to develop a better understanding of such processes and to further develop the Backcasting-Adaptive Management (BCAM) methodology. A framework for case evaluation is developed using six dimensions: (i) inputs and resources, (ii) future vision, (iii) stakeholder engagement, (iv) methodological aspects, (v) pathway development and (vi) impact. Major conclusions based on a cross-case comparison and testing propositions are (i) participatory vision development is a strong tool for climate change adaptation planning in different governance contexts and shows considerable diversity in its application in these contexts; (ii) a single, shared future vision is not a prerequisite for vision and pathway development and endorsement; (iii) broad stakeholder engagement enriches strategy development, but the involvement of marginal groups requires additional efforts and capacity building; (iv) multiple pathways and robust elements are useful but require novel expertise; and (v) more institutional embeddedness and support for participatory processes lead to better implementation of the outcomes of these processes. 相似文献
997.
Bregje K. van Wesenbeeck Wiebe de Boer Siddharth Narayan Wouter R. L. van der Star Mindert B. de Vries 《Mitigation and Adaptation Strategies for Global Change》2017,22(7):1087-1094
Adaptation planning for flood risk forms a significant part of global climate change response. Engineering responses to higher water levels can be prohibitively costly. Several recent studies emphasize the potential role of ecosystems in flood protection as adaptive risk reduction measures while also contributing to carbon fixation. Here, we use a conceptual model study to illustrate the built-in adaptive capability of ecosystems to reduce a wide range of wave heights, occurring at different water levels, to a narrower range. Our model shows that wave height of waves running through a forested section is independent of initial height or of water level. Although the underlying phenomenon of non-linear wave attenuation within coastal vegetation is well studied, implications of reducing variability in wave heights for design of ecosystem and levee combinations have not yet been properly outlined. Narrowing the range of wave heights by a vegetation field generates an adaptive levee that is robust to a whole range of external conditions rather than only to a maximum wave height. This feature can substantially reduce costs for retrofitting of levees under changing future wave climates. Thereby, in wave prone areas, inclusion of ecosystems into flood defense schemes constitutes an adaptive and safe alternative to only hard engineered flood risk measures. 相似文献
998.
Paul J. A. Withers Kimo C. van Dijk Tina-Simone S. Neset Thomas Nesme Oene Oenema Gitte H. Rubæk Oscar F. Schoumans Bert Smit Sylvain Pellerin 《Ambio》2015,44(2):193-206
The inefficient use of phosphorus (P) in the food chain is a threat to the global aquatic environment and the health and well-being of citizens, and it is depleting an essential finite natural resource critical for future food security and ecosystem function. We outline a strategic framework of 5R stewardship (Re-align P inputs, Reduce P losses, Recycle P in bioresources, Recover P in wastes, and Redefine P in food systems) to help identify and deliver a range of integrated, cost-effective, and feasible technological innovations to improve P use efficiency in society and reduce Europe’s dependence on P imports. Their combined adoption facilitated by interactive policies, co-operation between upstream and downstream stakeholders (researchers, investors, producers, distributors, and consumers), and more harmonized approaches to P accounting would maximize the resource and environmental benefits and help deliver a more competitive, circular, and sustainable European economy. The case of Europe provides a blueprint for global P stewardship. 相似文献
999.
Digital technology and the conservation of nature 总被引:1,自引:0,他引:1
Digital technology is changing nature conservation in increasingly profound ways. We describe this impact and its significance through the concept of ‘digital conservation’, which we found to comprise five pivotal dimensions: data on nature, data on people, data integration and analysis, communication and experience, and participatory governance. Examining digital innovation in nature conservation and addressing how its development, implementation and diffusion may be steered, we warn against hypes, techno-fix thinking, good news narratives and unverified assumptions. We identify a need for rigorous evaluation, more comprehensive consideration of social exclusion, frameworks for regulation and increased multi-sector as well as multi-discipline awareness and cooperation. Along the way, digital technology may best be reconceptualised by conservationists from something that is either good or bad, to a dual-faced force in need of guidance. 相似文献
1000.