全文获取类型
收费全文 | 221篇 |
免费 | 8篇 |
国内免费 | 1篇 |
专业分类
安全科学 | 8篇 |
废物处理 | 9篇 |
环保管理 | 39篇 |
综合类 | 25篇 |
基础理论 | 44篇 |
污染及防治 | 72篇 |
评价与监测 | 20篇 |
社会与环境 | 11篇 |
灾害及防治 | 2篇 |
出版年
2023年 | 5篇 |
2022年 | 6篇 |
2021年 | 13篇 |
2020年 | 7篇 |
2019年 | 7篇 |
2018年 | 6篇 |
2017年 | 17篇 |
2016年 | 7篇 |
2015年 | 12篇 |
2014年 | 11篇 |
2013年 | 20篇 |
2012年 | 8篇 |
2011年 | 11篇 |
2010年 | 7篇 |
2009年 | 11篇 |
2008年 | 14篇 |
2007年 | 12篇 |
2006年 | 15篇 |
2005年 | 3篇 |
2004年 | 10篇 |
2003年 | 2篇 |
2002年 | 2篇 |
2001年 | 3篇 |
2000年 | 3篇 |
1999年 | 2篇 |
1995年 | 5篇 |
1993年 | 2篇 |
1991年 | 1篇 |
1988年 | 3篇 |
1987年 | 1篇 |
1983年 | 2篇 |
1958年 | 1篇 |
1957年 | 1篇 |
排序方式: 共有230条查询结果,搜索用时 218 毫秒
141.
Gabriel Hiromite Yoshino Lindemberg Lima Fernandes Júnior Hiroyuki Ishihara Adnilson Igor Martins da Silva 《Environment, Development and Sustainability》2014,16(2):431-442
The Brazilian Amazon has about 69 % of available freshwater in Brazil, an amount that ends up creating the illusion that no lack of water and not lacking in the region, the large supply of this resource becomes a problem when it comes to the Management and Planning Water Resources in the Amazon, according to the wasteful use and lack of maintenance of stocks, compounded by the release of untreated wastewater. Speaking of water conservation programs in the Amazon a few decades ago and still today, with less intensity, is somewhat strange, given the large amount of water available and the culture of abundance. Thus, this research discusses the importance of the use of rainwater for non-potable purposes, since the potential for exploitation, throughout the year, due to this high rainfall in the Amazon region, ranging from, on average, 119.6 mm in months from November to 441.6 mm in March. The methods used for sizing of the reservoir were the Rippl and interactive, and economic viability checking done by the methods of net present value and discounted payback. As a result, there was a volume exceeding 1,000 m³ obtained by the method of Rippl, while the interactive method was a maximum of 75 m³. The economic viability presented fragile as a function of time to return exceeds the useful life of the utilization system for rainwater. 相似文献
142.
This study examines the bleaching responses of scleractinian corals at four sites in Kenya (Kanamai, Vipingo, Mombasa and
Nyali) representing two distinct lagoon habitats (relatively shallow and relatively deep). Bleaching incidence was monitored
for the whole coral community, while zooxanthellae densities and chlorophyll levels were monitored for target species (Pocillopora damicornis, Porites lutea, and Porites cylindrica) during a non-bleaching year (2006) and a year of mild-bleaching (2007). Differences in bleaching responses between habitats
were observed, with shallower sites Kanamai and Vipingo exhibiting lower bleaching incidence than deeper sites Nyali and Mombasa.
These shallower lagoons display more fluctuating thermal and light environments than the deeper sites, suggesting that corals
in the shallower lagoons have acclimatized and/or adapted to the fluctuating environmental conditions they endure on a daily
basis and have become more resistant to bleaching stress. In deeper sites that did exhibit higher bleaching (Mombasa and Nyali),
it was found that coral recovery occurred more quickly in the protected area than in the non-protected area. 相似文献
143.
This paper describes the development and testing of the ALMaSS rabbit model and its baseline, and subsequently its application to the question of lagomorph population vulnerability in environmental risk assessment (ERA). Development and testing following a pattern-oriented modelling protocol resulted in a model able to replicate local and landscape-level rabbit population patterns. We then tested how robust rabbit populations are to an (imaginary) extreme toxic stressor at a landscape level in a variety of landscapes, and to what extremes key uncertain model parameters must be pushed to cause extinctions. This was contrasted with the same (imaginary) toxic stressor applied to the already existing ALMaSS hare model. For EU risk assessment of plant protection products, these results clearly indicate that if the protection goal is population-level impacts, either in abundance and/or distribution, then the hare is a much more vulnerable species than the rabbit under all the conditions tested. Rabbits would only be more vulnerable than hares if the entire population were to be exposed simultaneously, when lower body mass would then be a critical factor. This did not occur even though the toxicant and exposure scenarios tested here were extreme and, in fragmented landscapes at scales used here, will not occur in reality from the use of plant protection products on crop fields. As well as specifically answering the question on rabbit versus hare vulnerability, this study generally illustrates the potential application of models for setting focal species for risk assessments. 相似文献
144.
Rosa Isabel M. D. Gabriel Cristina Carreiras Joāo M. B. 《Regional Environmental Change》2017,17(6):1687-1699
Regional Environmental Change - The Brazilian Amazon in the past decades has been suffering severe landscape alteration, mainly due to anthropogenic activities, such as road building and land... 相似文献
145.
Hibernation and daily torpor are two distinct forms of torpor, and although they are related, it is not known how and in which sequence they evolved. As the pattern of torpor expressed by the oldest marsupial order the opossums (Didelphimorphia) may provide insights into the evolution of torpor, we aimed to provide the first quantitative data on the thermal biology and torpor expression of the rare Patagonian opossum (Lestodelphys halli). It is the opossum with the southernmost distribution, has a propensity of autumnal fattening, and therefore, is likely to hibernate. We captured two male Lestodelphys, which while in captivity displayed strong daily fluctuations of body temperatures (Tb) measured with implanted miniature data loggers even when they remained normothermic. In autumn and early winter, torpor was expressed occasionally when food was available, but cold exposure and food withdrawal increased torpor use. The mean Tb throughout the study was 32.2?±?1.4 °C, the minimum Tb measured in torpid Lestodelphys was 7.7 °C, average torpor bout duration was 10.3 h, and the maximum torpor bout duration was 42.5 h. Thus, the pattern of torpor expressed by Lestodelphys was intermediate between that of daily heterotherms and hibernators suggesting that it may represent an ancestral opportunistic torpor pattern from which the derived patterns of daily torpor and seasonal hibernation diverged. 相似文献
146.
Ruff CP Schindler DE Armstrong JB Bentley KT Brooks GT Holtgrieve GW McGlauflin MT Torgersen CE Seeb JE 《Ecology》2011,92(11):2073-2084
Habitat heterogeneity can generate intraspecific diversity through local adaptation of populations. While it is becoming increasingly clear that population diversity can increase stability in species abundance, less is known about how population diversity can benefit consumers that can integrate across population diversity in their prey. Here we demonstrate cascading effects of thermal heterogeneity on trout-salmon interactions in streams where rainbow trout rely heavily on the seasonal availability of anadromous salmon eggs. Water temperature in an Alaskan stream varied spatially from 5 degrees C to 17.5 degrees C, and spawning sockeye salmon showed population differentiation associated with this thermal heterogeneity. Individuals that spawned early in cool regions of the 5 km long stream were genetically differentiated from those spawning in warmer regions later in the season. Sockeye salmon spawning generates a pulsed resource subsidy that supports the majority of seasonal growth in stream-dwelling rainbow trout. The spatial and temporal structuring of sockeye salmon spawn timing in our focal stream extended the duration of the pulsed subsidy compared to a thermally homogeneous stream with a single population of salmon. Further, rainbow trout adopted movement strategies that exploited the multiple pulses of egg subsidies in the thermally heterogeneous stream. Fish that moved to track the resource pulse grew at rates about 2.5 times higher than those that remained stationary or trout in the reference stream with a single seasonal pulse of eggs. Our results demonstrate that habitat heterogeneity can have important effects on the population diversity of dominant species, and in turn, influence their value to species that prey upon them. Therefore, habitat homogenization may have farther-reaching ecological effects than previously considered. 相似文献
147.
Gabriel P. Hughes Annie E. Spikes Jeffrey D. Holland Matthew D. Ginzel 《Chemoecology》2011,21(2):99-105
Contact pheromones mediate mate recognition and play important roles in mating systems of longhorned beetles (Coleoptera:
Cerambycidae). One common bioassay of contact chemoreception in cerambycids involves presenting a freeze-killed female to
a male in a Petri dish arena. If the male attempts to mate with the female carcass, it confirms that mate recognition signals
are present and intact and behavior is not involved. Cuticular hydrocarbons are then stripped from the female with successive
solvent washes, rendering her unattractive to males and also resulting in a crude extract containing the cuticular hydrocarbons.
To test the bioactivity of the crude extract, the same female is then treated with the extract and presented again to the
male. Males of some species, including Megacyllene robiniae (F?rster), respond less readily to reconstituted females than to those same beetles before they were solvent-extracted. In
the present study, we test the hypothesis that the contact pheromone of M. robiniae, Z9:C25, exists as a layer on the surface of the epicuticle. We used solid phase microextraction (SPME) to sample cuticular hydrocarbons
of female beetles after they were freeze-killed, solvent washed, and treated with crude cuticular extracts. We found that
extracting cuticular hydrocarbons from females and applying the resulting crude extract back onto the solvent-washed cadaver
scrambles the wax layer and decreases the abundance of the contact pheromone presented on the surface of the insect. 相似文献
148.
Torres Fernando G. De-la-Torre Gabriel E. 《Environmental science and pollution research international》2022,29(36):54045-54059
Environmental Science and Pollution Research - Peru is one of the great gold producers worldwide. However, a significant portion of the gold produced in Peru derives from artisanal small-scale gold... 相似文献
149.
150.
Bachner Gabriel Bednar-Friedl Birgit Knittel Nina 《Mitigation and Adaptation Strategies for Global Change》2019,24(7):1325-1341
Mitigation and Adaptation Strategies for Global Change - Public adaptation to climate change affects government budgets directly on the expenditure side, but also indirectly via changes in the tax... 相似文献