全文获取类型
收费全文 | 269篇 |
免费 | 11篇 |
国内免费 | 2篇 |
专业分类
安全科学 | 15篇 |
废物处理 | 11篇 |
环保管理 | 55篇 |
综合类 | 42篇 |
基础理论 | 88篇 |
环境理论 | 1篇 |
污染及防治 | 42篇 |
评价与监测 | 15篇 |
社会与环境 | 12篇 |
灾害及防治 | 1篇 |
出版年
2023年 | 8篇 |
2022年 | 8篇 |
2021年 | 20篇 |
2020年 | 12篇 |
2019年 | 18篇 |
2018年 | 14篇 |
2017年 | 15篇 |
2016年 | 18篇 |
2015年 | 12篇 |
2014年 | 14篇 |
2013年 | 9篇 |
2012年 | 16篇 |
2011年 | 28篇 |
2010年 | 11篇 |
2009年 | 16篇 |
2008年 | 11篇 |
2007年 | 7篇 |
2006年 | 17篇 |
2005年 | 6篇 |
2004年 | 3篇 |
2003年 | 2篇 |
2002年 | 3篇 |
2001年 | 3篇 |
1999年 | 2篇 |
1998年 | 2篇 |
1997年 | 1篇 |
1996年 | 1篇 |
1994年 | 2篇 |
1993年 | 1篇 |
1991年 | 1篇 |
1988年 | 1篇 |
排序方式: 共有282条查询结果,搜索用时 15 毫秒
81.
Hollamby S Afema-Azikuru J Waigo S Cameron K Gandolf AR Norris A Sikarskie JG 《Environmental monitoring and assessment》2006,118(1-3):13-20
An animal’s suitability as a biomonitor of environmental change can be determined by biological, reproductive and ecological
characteristics determined at the class, order and species level. The animal’s habitat where the research is to be performed
and the form, function and structure of the environmental change being studied within that habitat also determines suitability.
Non-threatened populations of large, non-migratory, long-lived, seasonally-breeding tertiary avian predators, whose dietary
preferences are narrow and known, can be useful as monitors of environmental chemical contaminants. If chemicals are being
monitored, a quantifiable endpoint effect must be demonstrated in the species, or a similar species under experimental laboratory
conditions. Logistical and economic issues as well as public and regulatory authority acceptance should also be considered
when assessing the suitability of a species as a biomonitor. 相似文献
82.
David Manuel-Navarrete Gilberto C. Gallopín Mariela Blanco Martín Díaz-Zorita Diego O. Ferraro Hilda Herzer Pedro Laterra María R. Murmis Guillermo P. Podestá Jorge Rabinovich Emilio H. Satorre Filemón Torres Ernesto F. Viglizzo 《Environment, Development and Sustainability》2009,11(3):621-638
Assessing the sustainability of complex development processes requires multi-causal and integrated analyses. We develop a
system-based methodology, rooted in interdisciplinary discussion and consensus building between 15 experts, to construct a
multi-causal diagram which examines the sustainability of the Argentine Pampas′ process of agriculturization. The resulting
diagram includes 25 factors and provides a big-picture of the multiple dimensions and interrelations affecting sustainability.
According to this examination, the increasing concentration of production and the incorporation of technological innovations,
triggered by economic and institutional factors, are the cause of environmental distresses and social changes, whose consequences
for sustainability are still highly disputed. Nevertheless, the symptoms of both environmental and social unsustainability
are more evident in the case of the extra-Pampean regions than in the Pampas. This suggests that the Pampean agriculture model
should not be transferred to these regions without substantial modifications. The experts did not reach consensus on whether
the agriculturization process is overall sustainable or unsustainable. Lack of consensus revolved mainly around opposing perspectives
regarding the significance of the threats to environmental sustainability. The magnitude of socio-distributive unbalance and
loss of rural jobs were also contentious. Yet, the paper shows how the exercise of building a joint causal diagram was undoubtedly
helpful for linking piece-meal disciplinary facts, brought in from all fronts, into a comprehensive and coherent picture.
Readers should send their comments on this paper to: BhaskarNath@aol.com within 3 months of publication of this issue. 相似文献
83.
Ramsdorf WA Ferraro MV Oliveira-Ribeiro CA Costa JR Cestari MM 《Environmental monitoring and assessment》2009,158(1-4):77-85
Different genetic biomarkers have been used to evaluate the pollution effects of mutagenic agents such as metals and also a great variety of chemicals delivered on the environment by human activities. This way, the aim of the present report was to evaluate the effects of inorganic lead in fishes through the frequency of piscine micronuclei and nuclear morphological alterations in peripheral cells, chromosomal aberration frequency and comet assays in blood and kidney cells. Specimens of Hoplias malabaricus received different doses of lead by intra-peritoneal injections at time of 96 h. There was not a significant difference between control and treated groups for the piscine micronucleus and chromosomal aberration assays. In the comet assays there was a significant difference between control and contaminated groups. However, a significant difference between the applied doses was not observed. The results obtained with the comet assays also show that blood presented a higher sensibility than the kidney tissue, possibly due to the acute contamination. Although the results showed the genotoxic potential of lead at the 21 and 63 microg Pb(2 + )/g doses for both tissues, the lowest dose is considered more appropriate for future bioassays. 相似文献
84.
Copper partitioning was studied in seven calcareous soils at moisture content corresponding to 1.2 times the field moisture content (soil water potential 7.84 J kg(-1)). Copper retention was accompanied by the release in soil solution of Ca(2+), Mg(2+), Na(+), and H(+), and the total amount of these cations released was 0.8 to 1.09 times the amount of Cu sorbed (mol(c):mol(c)). The relationships between Cu activity and pH, and the balance of cations in soils correspond with the surface precipitation of CuCO(3) as the main mechanism of Cu retention. The values of ion activity product of surface precipitate were close for all studied soils with the average log(IAP(CuCO(3)))=-15.51. The relationship between copper activity in soil solutions and soil properties is well fit by a regression relating pCu (-log copper ion activity) with soil pH, total Cu, and carbonate content. 相似文献
85.
86.
Population responses of synanthropic species to urbanization may be explained by the resource-matching rule, which postulates that individuals should distribute themselves according to resource availability. According to the resource-matching rule, urban habitats will contain greater densities if they provide better resources than rural habitats. However, because resource availability is density dependent, individuals in urban areas would ultimately achieve fitness levels comparable to, but no better than, individuals in less urban areas. Some ecologists suggest that synanthropic birds may not conform to the resource-matching rule and may instead overmatch (i.e., overexploit) in urban habitats, ultimately leading to lower fitness despite greater resource levels. Using the Northern Cardinal (Cardinalis cardinalis) as a focal species, we evaluated if Cardinal populations in urban and rural habitats were consistent with predictions of consumer resource matching. During 2003-2006 we documented population density, adult body condition, apparent survival, and annual reproductive productivity of Cardinals in riparian forest stands within urban (n = 8 stands) and rural (n = 6 stands) landscapes in Ohio, USA. Density of Cardinals in urban forests was four times that found in more rural forests. Mark-resight data from 147 males and 125 females over four years indicated that apparent survival rates were similar between urban and rural landscapes (phi = 0.64, SE = 0.039 for males and phi = 0.57, SE = 0.04 for females). Similarly, body condition indices of 168 males, 142 females, and 118 nestlings did not differ significantly between landscapes. Annual reproductive productivity (mean number of fledglings per pair over breeding season) of 294 pairs was comparable for urban (2.4 +/- 0.18 [mean +/- SE] and rural (2.1 +/- 0.18) young birds. Thus, contrary to recent suggestions, we find that high densities of certain synanthropic species in urban landscapes are consistent with expectations of consumer resource matching. 相似文献
87.
Phenology of mixed woody-herbaceous ecosystems following extreme events: net and differential responses 总被引:2,自引:0,他引:2
Ecosystem responses to key climate drivers are reflected in phenological dynamics such as the timing and degree of "green-up" that integrate responses over spatial scales from individual plants to ecosystems. This integration is clearest in ecosystems dominated by a single species or life form, such as seasonally dynamic grasslands or more temporally constant evergreen forests. Yet many ecosystems have substantial contribution of cover from both herbaceous and woody evergreen plants. Responses of mixed woody-herbaceous ecosystems to climate are of increasing concern due to their extensive nature, the potential for such systems to yield more complex responses than those dominated by a single life form, and projections that extreme climate and weather events will increase in frequency and intensity with global warming. We present responses of a mixed woody-herbaceous ecosystem type to an extreme event: regional-scale pi?on pine mortality following an extended drought and the subsequent herbaceous green-up following the first wet period after the drought. This example highlights how reductions in greenness of the slower, more stable evergreen woody component can rapidly be offset by increases associated with resources made available to the relatively more responsive herbaceous component. We hypothesize that such two-phase phenological responses to extreme events are characteristic of many mixed woody-herbaceous ecosystems. 相似文献
88.
Veerasingam Subramanian Vethamony Ponnumony Aboobacker Valliyil Mohammed Giraldes Amanda Engmann Dib Samah Al-Khayat Jassim A. 《Environmental science and pollution research international》2021,28(26):34259-34268
Environmental Science and Pollution Research - Microplastic (MP) pollution is an emerging environmental problem, particularly in the marine environment, and nations are concerned about this issue.... 相似文献
89.
Ferraro Alberto Fabbricino Massimiliano van Hullebusch Eric D. Esposito Giovanni 《Environmental science and pollution research international》2017,24(27):21960-21972
Environmental Science and Pollution Research - A comparison of Cu extraction yields for three different ethylenediamine-N,N′-disuccinic acid (EDDS)-enhanced washing configurations was... 相似文献
90.
Martins Amanda Weege S. Silveira Tony L. R. Remião Mariana H. Domingues William Borges Dellagostin Eduardo N. Junior Antônio Sergio Varela Corcini Carine D. Costa Patrícia G. Bianchini Adalto Somoza Gustavo M. Robaldo Ricardo B. Campos Vinicius Farias 《Environmental science and pollution research international》2021,28(46):65127-65139
Environmental Science and Pollution Research - Roundup Transorb® (RDT) is a glyphosate-based herbicide commonly used in agricultural practices worldwide. This herbicide exerts negative effects... 相似文献