全文获取类型
收费全文 | 1039篇 |
免费 | 11篇 |
国内免费 | 5篇 |
专业分类
安全科学 | 93篇 |
废物处理 | 46篇 |
环保管理 | 110篇 |
综合类 | 141篇 |
基础理论 | 189篇 |
污染及防治 | 326篇 |
评价与监测 | 91篇 |
社会与环境 | 52篇 |
灾害及防治 | 7篇 |
出版年
2023年 | 10篇 |
2022年 | 9篇 |
2021年 | 19篇 |
2020年 | 9篇 |
2019年 | 23篇 |
2018年 | 34篇 |
2017年 | 43篇 |
2016年 | 43篇 |
2015年 | 30篇 |
2014年 | 43篇 |
2013年 | 110篇 |
2012年 | 48篇 |
2011年 | 58篇 |
2010年 | 34篇 |
2009年 | 36篇 |
2008年 | 45篇 |
2007年 | 59篇 |
2006年 | 50篇 |
2005年 | 39篇 |
2004年 | 39篇 |
2003年 | 37篇 |
2002年 | 32篇 |
2001年 | 14篇 |
2000年 | 25篇 |
1999年 | 10篇 |
1998年 | 5篇 |
1997年 | 6篇 |
1996年 | 8篇 |
1995年 | 10篇 |
1994年 | 9篇 |
1993年 | 15篇 |
1992年 | 6篇 |
1991年 | 6篇 |
1990年 | 4篇 |
1989年 | 4篇 |
1988年 | 8篇 |
1987年 | 4篇 |
1984年 | 11篇 |
1983年 | 7篇 |
1982年 | 6篇 |
1978年 | 3篇 |
1968年 | 2篇 |
1965年 | 3篇 |
1963年 | 4篇 |
1962年 | 3篇 |
1961年 | 3篇 |
1960年 | 3篇 |
1959年 | 3篇 |
1958年 | 2篇 |
1957年 | 2篇 |
排序方式: 共有1055条查询结果,搜索用时 859 毫秒
551.
It is generally argued that leader visions motivate followers by focusing on reaching desirable end‐states. However, it has also been suggested that visions may motivate followers by focusing on avoiding undesirable situations. In this paper we investigate the effects of appeals that focus on preventing an undesirable situation (i.e., prevention‐appeals) as well as appeals that focus on promoting a desirable situation (i.e., promotion‐appeals). We argue that the effectiveness of promotion‐ and prevention‐appeals is contingent on follower regulatory focus. In two experiments we show that prevention‐appeals lead to better performance than promotion‐appeals for more prevention‐focused followers, while the reverse is true for more promotion‐focused followers. We find this pattern for a dispositional measure of follower regulatory focus (Study 1) as well as for a manipulation of follower regulatory focus (Study 2). Copyright © 2009 John Wiley & Sons, Ltd. 相似文献
552.
Carol A Johnston Dana M Ghioca Mirela Tulbure Barbara L Bedford Michael Bourdaghs Christin B Frieswyk Lynn Vaccaro Joy B Zedler 《Ecological applications》2008,18(4):983-1001
Emergent plants can be suitable indicators of anthropogenic stress in coastal wetlands if their responses to natural environmental variation can be parsed from their responses to human activities in and around wetlands. We used hierarchical partitioning to evaluate the independent influence of geomorphology, geography, and anthropogenic stress on common wetland plants of the U.S. Great Lakes coast and developed multi-taxa models indicating wetland condition. A seven-taxon model predicted condition relative to watershed-derived anthropogenic stress, and a four-taxon model predicted condition relative to within-wetland anthropogenic stressors that modified hydrology. The Great Lake on which the wetlands occurred explained an average of about half the variation in species cover, and subdividing the data by lake allowed us to remove that source of variation. We developed lake-specific multi-taxa models for all of the Great Lakes except Lake Ontario, which had no plant species with significant independent effects of anthropogenic stress. Plant responses were both positive (increasing cover with stress) and negative (decreasing cover with stress), and plant taxa incorporated into the lake-specific models differed by Great Lake. The resulting models require information on only a few taxa, rather than all plant species within a wetland, making them easier to implement than existing indicators. 相似文献
553.
From individuals to ecosystem function: toward an integration of evolutionary and ecosystem ecology 总被引:1,自引:0,他引:1
Schmitz OJ Grabowski JH Peckarsky BL Preisser EL Trussell GC Vonesh JR 《Ecology》2008,89(9):2436-2445
An important goal in ecology is developing general theory on how the species composition of ecosystems is related to ecosystem properties and functions. Progress on this front is limited partly because of the need to identify mechanisms controlling functions that are common to a wide range of ecosystem types. We propose that one general mechanism, rooted in the evolutionary ecology of all species, is adaptive foraging behavior in response to predation risk. To support our claim, we present two kinds of empirical evidence from plant-based and detritus-based food chains of terrestrial and aquatic ecosystems. The first kind comes from experiments that explicitly trace how adaptive foraging influences ecosystem properties and functions. The second kind comes from a synthesis of studies that individually examine complementary components of particular ecosystems that together provide an integrated perspective on the link between adaptive foraging and ecosystem function. We show that the indirect effects of predators on plant diversity, plant productivity, nutrient cycling, trophic transfer efficiencies, and energy flux caused by consumer foraging shifts in response to risk are qualitatively different from effects caused by reductions in prey density due to direct predation. We argue that a perspective of ecosystem function that considers effects of consumer behavior in response to predation risk will broaden our capacity to explain the range of outcomes and contingencies in trophic control of ecosystems. This perspective also provides an operational way to integrate evolutionary and ecosystem ecology, which is an important challenge in ecology. 相似文献
554.
555.
Katharine L. Jacobs Gregg M. Garfin Barbara J. Morehouse 《Journal of the American Water Resources Association》2005,41(2):437-446
ABSTRACT: In response to recent severe drought conditions throughout the state, Arizona recently developed its first drought plan. The Governor's Drought Task Force focused on limiting the economic and social impacts of future droughts through enhanced adaptation and mitigation efforts. The plan was designed to maximize the use of new, scientific breakthroughs in climate monitoring and prediction and in vulnerability assessment. The long term objective of the monitoring system is to allow for evaluation of conditions in multiple sectors and at multiple scales. Stakeholder engagement and decision support are key objectives in reducing Arizona's vulnerability in light of the potential for severe, sustained drought. The drivers of drought conditions in Arizona include the El Nino‐Southern Oscillation, the Pacific Decadal Oscillation, and the Atlantic Multidecadal Oscillation. 相似文献
556.
Byliński Hubert Barczak Radosław J. Gębicki Jacek Namieśnik Jacek 《Environmental science and pollution research international》2019,26(6):5500-5513
Environmental Science and Pollution Research - One of the potential emission sources of odorous compounds from wastewater treatment plants is sludge processing. The odorous compounds released from... 相似文献
557.
Pawlik-Skowrońska Barbara Toporowska Magdalena Mazur-Marzec Hanna 《Environmental science and pollution research international》2019,26(12):11793-11804
Environmental Science and Pollution Research - Cyanobacterial blooms in eutrophic water bodies are a worldwide problem. Combined effects of mixtures of secondary metabolites produced by different... 相似文献
558.
Jaszczur Marek Teneta Janusz Styszko Katarzyna Hassan Qusay Burzyńska Paulina Marcinek Ewelina Łopian Natalia 《Environmental science and pollution research international》2019,26(9):8402-8417
Environmental Science and Pollution Research - The maximisation of the efficiency of the photovoltaic system is crucial in order to increase the competitiveness of this technology. Unfortunately,... 相似文献
559.
Świsłowski Paweł Dołhańczuk-Śródka Agnieszka Rajfur Małgorzata 《Environmental science and pollution research international》2020,27(18):22235-22250
Environmental Science and Pollution Research - This article presents a bibliometric study of 200 European publications released between 2001 and 2016, about the contamination of mushrooms by... 相似文献
560.
Cheng Qian Marchetti Barbara Chen Mingfang Li Jun-Tao Wu Jiayi Liu Xiangyu Zhou Xiao-Dong 《Journal of Material Cycles and Waste Management》2023,25(3):1534-1548
Journal of Material Cycles and Waste Management - Recycling Co resource from spent lithium-ion batteries (LIBs) is significant for Co deficiency and environmental protection. A novel approach for... 相似文献