全文获取类型
收费全文 | 472篇 |
免费 | 2篇 |
专业分类
安全科学 | 9篇 |
废物处理 | 38篇 |
环保管理 | 15篇 |
综合类 | 74篇 |
基础理论 | 107篇 |
污染及防治 | 157篇 |
评价与监测 | 58篇 |
社会与环境 | 15篇 |
灾害及防治 | 1篇 |
出版年
2023年 | 6篇 |
2022年 | 18篇 |
2021年 | 13篇 |
2020年 | 6篇 |
2019年 | 9篇 |
2018年 | 21篇 |
2017年 | 19篇 |
2016年 | 30篇 |
2015年 | 15篇 |
2014年 | 34篇 |
2013年 | 66篇 |
2012年 | 30篇 |
2011年 | 34篇 |
2010年 | 27篇 |
2009年 | 24篇 |
2008年 | 9篇 |
2007年 | 11篇 |
2006年 | 14篇 |
2005年 | 4篇 |
2003年 | 3篇 |
2002年 | 4篇 |
2000年 | 2篇 |
1997年 | 2篇 |
1996年 | 2篇 |
1995年 | 3篇 |
1994年 | 2篇 |
1993年 | 2篇 |
1986年 | 2篇 |
1985年 | 1篇 |
1984年 | 1篇 |
1982年 | 1篇 |
1980年 | 2篇 |
1972年 | 1篇 |
1971年 | 2篇 |
1970年 | 7篇 |
1969年 | 2篇 |
1968年 | 1篇 |
1967年 | 4篇 |
1966年 | 3篇 |
1965年 | 2篇 |
1964年 | 1篇 |
1961年 | 1篇 |
1960年 | 4篇 |
1959年 | 4篇 |
1958年 | 10篇 |
1957年 | 4篇 |
1956年 | 3篇 |
1955年 | 1篇 |
1931年 | 1篇 |
1930年 | 1篇 |
排序方式: 共有474条查询结果,搜索用时 191 毫秒
61.
Rybová Kristýna Slavík Jan Burcin Boris Soukopová Jana Kučera Tomáš Černíková Alena 《Journal of Material Cycles and Waste Management》2018,20(3):1884-1891
Journal of Material Cycles and Waste Management - Increasing pressure of the European Union on diverting municipal waste from landfills requires an active role of households and commands a radical... 相似文献
62.
63.
64.
The Strait of Otranto is the connection between the Adriatic and Ionian Seas. Low nutrient concentrations, high transparency, and low phytoplankton cell density and biomass reflect the oligotrophic character of the area. Enrichment of the euphotic layer with nutrients is mainly due to discharge of Albanian and Greek rivers, as well as mixing and upwelling in winter/early spring. Following phytoplankton bloom in April, a progressive decrease of phytoplankton cell density is due to the consumption of nutrients throughout the proceeding summer and autumn. Nitrogen was a strong limiting factor for phytoplankton growth in summer. Deep biomass maxima were detected in the 50 to 100 m layer and corresponded mostly to cells smaller than 20 m. The eastern part of the strait is mostly influenced by the northerly inflowing current from the Ionian Sea, and the western part by the southerly outflowing current from the Adriatic Sea. This typical circulation could be disturbed by inertial oscillations in the current field, generated by the strong oscillating winds and cyclonic eddies. The type of circulation determined the distribution of thermohaline characteristics, abundance, biomass, as well as taxonomic composition of phytoplankton, across the strait. Ecological characteristics of the water masses on two sides of the strait were significantly different during the formation of a longitudinal thermohaline front in May 1990. 相似文献
65.
Temporal fluctuations of species composition and abundance of fish juveniles in the National Park Kornati were studied over
12 months from January to December 1992. A total of 40 168 individuals, representing 24 families and 69 species, were collected
using a 50 m long beach seine. The community was dominated numerically by a few species: Atherina hepsetus (45.90%), Sarpa salpa (21.21%), Diplodus vulgaris (10.49%), and Symphodus ocellatus (6.98%), constituting over 84.58% of the total catch. Similarity between patterns in the abundance of the 17 most common
species were examined using correlation matrix-based principal component analysis. Results were compared to the abiotic factors
leading to the conclusion that only a low amount of variation in the abundance field can be explained by temperature, salinity
and dissolved oxygen.
Received: 23 March 1997 / Accepted: 11 April 1997 相似文献
66.
Michal Forejt Martin Dolejš Johana Zacharová Pavel Raška 《Journal of Land Use Science》2020,15(4):570-584
ABSTRACT Old cadastral maps represent a historical reference dataset for long-term land-use reconstructions. This study presents identification of inconsistencies in the nineteenth century Franziscean cadastre, one of the largest sets of old cadastral maps worldwide, by comparing three versions of the maps and written documents created in the same period. We identified all parcels and their land-use in the four sub-sources in six study areas. The overall share of inconsistencies among 5 771 identified parcels is 7.4%, with the biggest share of inconsistency in agroforestry and forestry classes. The most frequent inconsistencies are of ‘Not differentiable land use’ (n = 212) and ‘Different land-use’ categories across the sub-sources (n = 113). We conclude that the frequency of uncertainties in old cadastral maps may limit the validity of historical land-use reconstructions, affecting the eventual restoration and management efforts based on such data. We provide a summary for the use of Franziscean cadastre. 相似文献
67.
68.
Milan Vrtílek Jakub Žák Radim Blažek Matej Polačik Alessandro Cellerino Martin Reichard 《Die Naturwissenschaften》2018,105(11-12):68
Senescence in wild populations was long considered negligible but current evidence suggests that it is widespread in natural populations of mammals and birds, affecting the survival and reproductive output of older individuals. In contrast, little is known about reproductive senescence in species with asymptotic growth that can keep increasing their reproductive output as they grow older and larger. Using a cross-sectional study, we tested age-related decline in fecundity and relative allocation to reproduction in five wild populations of an annual killifish, Nothobranchius furzeri (Cyprinodontiformes). We did not detect any decline in absolute female egg production over their short lifespan in the wild. Relative fecundity (egg production controlled for female body mass) tended to decrease with age. This effect was driven primarily by a single population that survived 17 weeks, almost twice as long as the median persistence of the other four study populations. There was no decrease in relative ovary mass while in males, relative testes mass actually increased with age. Intra-population variation in relative ovary mass increased in older females suggesting heterogeneity in individual trajectories of female reproductive allocation. Overall, we demonstrate that annual killifish do not experience significant age-related decline in reproductive functions during their very short lifespan in the wild despite the marked deterioration of gonad tissue detected in captivity. 相似文献
69.
Monika Suškevičs Thomas Hahn Romina Rodela Biljana Macura Claudia Pahl-Wostl 《Journal of Environmental Planning and Management》2018,61(7):1085-1112
Learning is considered as a promising mechanism to cope with rapid environmental change. The implications of learning for natural resource management (NRM) have not been explored in-depth and the evidence on the topic is scattered across multiple sources. We provide a qualitative review of types of learning outcomes and consider their manifestations in NRM across selected empirical literature. We conducted a systematic search of the peer-reviewed literature (N = 1,223) and a qualitative meta-synthesis of included articles, with an explicit focus on learning outcomes and NRM changes (N = 53). Besides social learning, we found several learning concepts used, including policy and transformative learning, and multiple links between learning and NRM reported. We observe that the development of skills, together with a system approach involving multi-level capacities, is decisive for implications of learning for NRM. Future reviews could systematically compare how primary research applies different learning concepts and discusses links between learning and NRM changes. 相似文献
70.
Růžičková Jana Raclavská Helena Juchelková Dagmar Šafář Michal Kucbel Marek Švédová Barbora Slamová Karolina Grobelak Anna 《Environmental science and pollution research international》2023,30(4):8582-8600
Environmental Science and Pollution Research - The utilisation of waste wood from furniture production brings new problems connected with an incomplete thermochemical decomposition of additives... 相似文献