全文获取类型
收费全文 | 11079篇 |
免费 | 147篇 |
国内免费 | 162篇 |
专业分类
安全科学 | 242篇 |
废物处理 | 504篇 |
环保管理 | 1190篇 |
综合类 | 1812篇 |
基础理论 | 2565篇 |
环境理论 | 3篇 |
污染及防治 | 2730篇 |
评价与监测 | 873篇 |
社会与环境 | 1413篇 |
灾害及防治 | 56篇 |
出版年
2023年 | 72篇 |
2022年 | 157篇 |
2021年 | 148篇 |
2020年 | 97篇 |
2019年 | 127篇 |
2018年 | 188篇 |
2017年 | 216篇 |
2016年 | 294篇 |
2015年 | 208篇 |
2014年 | 358篇 |
2013年 | 945篇 |
2012年 | 371篇 |
2011年 | 489篇 |
2010年 | 407篇 |
2009年 | 462篇 |
2008年 | 543篇 |
2007年 | 570篇 |
2006年 | 425篇 |
2005年 | 405篇 |
2004年 | 398篇 |
2003年 | 365篇 |
2002年 | 350篇 |
2001年 | 439篇 |
2000年 | 310篇 |
1999年 | 160篇 |
1998年 | 113篇 |
1997年 | 121篇 |
1996年 | 130篇 |
1995年 | 163篇 |
1994年 | 112篇 |
1993年 | 113篇 |
1992年 | 94篇 |
1991年 | 115篇 |
1990年 | 117篇 |
1989年 | 102篇 |
1988年 | 84篇 |
1987年 | 88篇 |
1986年 | 71篇 |
1985年 | 86篇 |
1984年 | 91篇 |
1983年 | 78篇 |
1982年 | 84篇 |
1981年 | 77篇 |
1980年 | 70篇 |
1979年 | 67篇 |
1978年 | 49篇 |
1977年 | 50篇 |
1974年 | 49篇 |
1973年 | 51篇 |
1972年 | 69篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
711.
V. M. Emets 《Russian Journal of Ecology》2016,47(4):371-375
The role of ecotones with different (sharp or smooth) spatial boundaries between forest and meadow in ant biodiversity preservation was studied at the right-of-way of a power line in the Voronezh Reserve. The ecotone with a sharp boundary between forest and meadow (transitional zone 2 m wide) had higher species richness of ants compared to the ecotones (also 2 m wide) with smooth boundary between forest and meadow. 相似文献
712.
N. P. Korablev M. P. Korablev P. N. Korablev I. L. Tumanov 《Russian Journal of Ecology》2016,47(3):289-295
A comparative analysis of epigenetic variation has been performed in nine European populations and population groups of the American mink. It has been shown that differentiation of samples in nonmetric characters is due mainly to endogenous processes that have occurred in introduced populations in the course of colonization of new territory by the invasive species. Environmental factors have played a secondary role, with the influence of the geographic (latitudinal) origin of a given sample being considerable and stronger than that of macroclimatic factors. 相似文献
713.
Relationships between stem diameter and phytomass of trees and their parts (single- and multistemmed growth forms) have been studied at different altitudinal levels of the present-day upper treeline ecotone on the Iremel’ Massif, the Southern Urals. The time course of changes in the structure and phytomass of birch–spruce stands during the past centuries has been reconstructed. It is shown that the expansion of forests to the mountains in this period has occurred against the background of rise in summer and winter temperatures and increase in the amount of solid precipitation in the Southern Urals. 相似文献
714.
L. E. Yalkovskaya M. A. Fominykh S. V. Mukhacheva Yu. A. Davydova A. V. Borodin 《Russian Journal of Ecology》2016,47(3):281-288
Fluctuating asymmetry (FA) of the mandible shape has been analyzed in bank voles from the zones affected by pollution from three copper smelters in the Urals. It has been shown that there is the necessity for a detailed analysis of the material, since the level of FA may depend on population parameters. Regardless of the pollution level, FA of the mandible region including the lower part of the mandibular body, ramus and processes is higher than in the diastema region. A gradient effect of toxic exposure on FA has been revealed: an increase in its level under increasing technogenic impact is clearly manifested along local pollution gradients. 相似文献
715.
L. P. Agulova N. S. Moskvitina N. P. Bol’shakova L. B. Kravchenko N. V. Ivanova V. N. Romanenko 《Russian Journal of Ecology》2016,47(5):460-466
The dynamics and correlations of ecophysiological parameters have been studied in two spatially separated multispecies communities of murine rodents and ixodid tick larvae and nymphs that parasitize them. It has been shown that all the processes under consideration have nonstationary, oscillatory dynamics. The long-term dynamics of connectivity of ecophysiological characteristics within communities and their synchronization by weather–climatic factors are, by nature, wavelike processes of transitions between the states with stronger and weaker linkage between parameters, which, along with nonstationarity, can contribute to the maintenance of stability and integrity of communities. 相似文献
716.
M. A. Solov’eva D. M. Glazov D. M. Kuznetsova V. V. Rozhnov 《Russian Journal of Ecology》2016,47(4):405-411
For the first time, satellite tagging of spotted seals (Phoca largha) has been performed in three regions of the Sea of Okhotsk: Chkalov Island in Sakhalin Bay, Ptichy Island, and the Bolshaya River mouth on the western coast of Kamchatka. As a result, regions inhabited by the seals in different periods of their life cycle and differences in the pattern of water area use by animals from different regions have been revealed. The seals from the western Kamchatka coast have covered greater distances during the observation period, compared to the animals from Sakhalin Bay. In the reproductive period, the seals from the western coast spread over the entire northern part of the Sea of Okhotsk, whereas the animals from the Sakhalin Bay move only to the Tatar Strait, the Sea of Japan. None of tagged seals has been located in the “reproductive center” at the eastern coast of Sakhalin. The seals tagged in different regions of the Sea of Okhotsk have never been located in the same place during the entire annual cycle, suggesting that the sea is inhabited by two reproductively isolated groups of ringed seals. 相似文献
717.
E. S. Zakharov V. M. Safronov L. P. Koryakina N. N. Smetanin 《Russian Journal of Ecology》2016,47(4):392-398
The population of foxes in the central regions of Yakutia has grown by a factor of four to five during the period from 2000 to 2011–2012, following an increase in the abundance of voles from the genus Microtus. A total of 130 carcasses of foxes taken in 2007–2012 have been examined. Age- and sex-related variation in morphological features has been described. The demographic structure of the population has been studied by estimating animal age from annual layers in the recording structures. Changes in female fertility and involvement in reproduction depending on age and feeding conditions have been analyzed. Changes in the composition of fox diet caused by long-term population depression in the mountain hare and their effect on the dynamics of fox abundance have been revealed. Age- and sex-related characteristics of the condition factor in foxes and sex-related differences in their dietary preferences have been demonstrated. 相似文献
718.
John N. Kittinger Trisann M. Bambico Dwayne Minton Alyssa Miller Manuel Mejia Nahaku Kalei Bradley Wong Edward W. Glazier 《Regional Environmental Change》2016,16(2):301-313
Environmental restoration projects are commonly touted for their ecological positives, but such projects can also provide significant socioeconomic and cultural benefits to local communities. We assessed the social dimensions of a large-scale coral reef restoration project in Maunalua Bay, O‘ahu, where >1.32 million kg of invasive marine macroalgae was removed from 11 hectares (90,000 m2; 23 acres) of impacted coral reef in an urbanized setting. We interviewed 131 community stakeholders and analyzed both quantitative and qualitative data to assess human uses of the environment, assess perceptions of environmental health, and characterize social dimensions (+/?) associated with the invasive algae removal effort. Results indicate substantial direct economic benefits, including the creation of more than 60+ jobs, benefiting more than 250 individuals and 81 households. The project helped develop a skilled workforce in a local business dedicated to environmental restoration and increased the capacity of community organizations to address other threats to reefs and watersheds. Other major benefits include revitalization of Native Hawaiian cultural practices and traditions and the successful use of harvested invasive algae as compost by local farmers. Our results show the project heightened community awareness and a broader sense of stewardship in the area, creating enabling conditions for collective community action. Our findings show that restoration projects that explicitly incorporate efforts to build community awareness, involvement, and a shared responsibility for a site may ultimately create the long-term capacity for sustainable stewardship programs. We conclude by discussing lessons learned for engaging productively with communities in environmental restoration and stewardship, which remains a central focus in conservation worldwide. 相似文献
719.
Ferreira Felipe Silva Brito Samuel Vieira de Oliveira Almeida Waltécio Alves Rômulo Romeu Nóbrega 《Regional Environmental Change》2016,16(2):543-551
Regional Environmental Change - The use and trade of animals in traditional medicine involves many different species, some of which are threatened with extinction. Thus, evaluating biological and... 相似文献
720.
IntroductionOzoneisanairpollutantformedthroughaseriesofphotochemicalreactionintroposphereandisoneofthemostimportantphytotoxicairpollutants.Ingeneral,directemissionofozonefromanthropogenicsourcesisnegligibleinthefreetroposphere .Accordingtothestudyonfor… 相似文献