全文获取类型
收费全文 | 83篇 |
免费 | 1篇 |
专业分类
安全科学 | 1篇 |
废物处理 | 5篇 |
环保管理 | 1篇 |
综合类 | 29篇 |
基础理论 | 18篇 |
污染及防治 | 13篇 |
评价与监测 | 10篇 |
社会与环境 | 3篇 |
灾害及防治 | 4篇 |
出版年
2022年 | 4篇 |
2021年 | 2篇 |
2019年 | 2篇 |
2018年 | 3篇 |
2017年 | 2篇 |
2016年 | 5篇 |
2015年 | 2篇 |
2014年 | 5篇 |
2013年 | 4篇 |
2012年 | 7篇 |
2011年 | 3篇 |
2010年 | 4篇 |
2009年 | 2篇 |
2007年 | 1篇 |
2006年 | 2篇 |
2005年 | 1篇 |
2004年 | 1篇 |
2003年 | 1篇 |
2002年 | 5篇 |
2001年 | 5篇 |
1998年 | 1篇 |
1997年 | 1篇 |
1996年 | 1篇 |
1995年 | 1篇 |
1994年 | 1篇 |
1993年 | 2篇 |
1989年 | 1篇 |
1983年 | 1篇 |
1980年 | 1篇 |
1979年 | 1篇 |
1963年 | 1篇 |
1962年 | 1篇 |
1957年 | 1篇 |
1956年 | 1篇 |
1954年 | 1篇 |
1953年 | 1篇 |
1947年 | 1篇 |
1921年 | 1篇 |
1920年 | 2篇 |
1919年 | 1篇 |
1918年 | 1篇 |
排序方式: 共有84条查询结果,搜索用时 187 毫秒
41.
Environmental Science and Pollution Research - The drastic increase of human population and industrial wastes mostly affects coastal areas. Crabs with limited mobility, especially in benthic... 相似文献
42.
43.
44.
Caroline Regina Schöner Michael Gerhard Schöner Gerald Kerth 《Behavioral ecology and sociobiology》2010,64(12):2053-2063
Many bat species regularly need to find new day roosts as they require numerous shelters each breeding season. It has been
shown that bats exchange information about roosts among colony members, and use echolocation and social calls of conspecifics
in order to find roosts. However, it is unclear if wild bats discriminate between social calls of conspecifics and other bat
species while searching for roosts. Furthermore, the extent that bats are attracted to potential roosts by each of these two
call types is unknown. We present a field experiment showing that social calls of conspecifics and other bat species both
attract bats to roosts. During two summers, we played back social calls of Bechstein’s bats (Myotis bechsteinii) and Natterer’s bats (Myotis nattereri) from different bat boxes that can serve as roosts for these species. All experimental bat boxes were monitored with infrared
video to identify the approaching bat species. Three species (M. bechsteinii, M. nattereri, and Plecotus auritus) approached the boxes significantly more often during nights when bat calls were played compared to nights without playbacks.
Bechstein’s bats and Natterer’s bats were both more attracted to social calls of conspecifics than of the other species, whereas
P. auritus did not discriminate between calls of either Myotis species. Only Bechstein’s bats entered experimental boxes and only at times when calls from conspecifics were played. Our
findings show that wild bats discriminate between social calls of conspecifics and other bat species although they respond
to both call types when searching for new roosts. 相似文献
45.
This paper illustrates the use of alternative, non-market valuation methods to estimate the economic value of ecological damage caused by the invasive plant Acacia saligna. We discuss the motivation to perform an economic valuation for bio-invasion in general and then examine the costs and benefits of conservation management programmes that reduce the risk of A. saligna invasion at the Nizzanim Long-Term Ecosystem Research (LTER) nature reserve in Israel. The study found that the annual mean willingness to pay (WTP) for containment or eradication of A. saligna was US$8.41 and US$8.83, respectively. The value placed on conserving the nature reserve was then compared to the cost of containment or eradication of the species, enabling a standard economic benefit–cost analysis. The result of this analysis showed that, using the most conservative method of valuation of the nature reserve, eradication of A. saligna gave a net benefit. 相似文献
46.
In recent regime shift analyses, the phytoplankton compartment of the marine food web was essentially represented by phytoplankton color or chlorophyll concentration. A detection of changes directly at the species level is highly desirable. The Helgoland Roads data series, a collection of high frequency long-term time series comprising biological and physico-chemical components of the southern North Sea, allow such an investigation at the level of single species. Aiming at a detection and characterization of habitat and community changes in the observation period (1962 until the end of 2008), we selected six species as representatives of certain classes, for example, benthic or neritic species, and applied a combination of novel analysis methods—a fitness-based analysis of the realized niche, a bloom-triggered averaging and a Markovian analysis of co-occurrence and succession patterns—to related abundance time series and concurrent environmental parameter time series. We found a general trend toward enlargement of niche size and shifts of the niche position, interesting salinity patterns around bloom events of two species, and statistically highly significant changes of a phytoplankton community segment after 1965 and after 1998. Interpreting our observations in ecological terms leads to the formulation of testable hypotheses. 相似文献
47.
48.
Ariel Rokach Robert Cohen Naomi Shapira Shmuel Einav Alex Mandibura Yaron Bar‐Dayan 《Disasters》2010,34(3):637-643
Little is known about the factors that may impact on the willingness of physicians and nurses to treat patients during a bioterrorism attack. This survey was conducted among 76 randomly selected nurses and physicians in the emergency rooms of three public hospitals in order to analyse the relationship between knowledge, profession and the willingness to treat anthrax. The study finds that the willingness of physicians and nurses to come to work is 50% greater among the group with the highest knowledge about anthrax (P < 0.0001). Within that group, the willingness to treat patients suspected of being infected with anthrax was 37% greater (P < 0.0001) and the willingness to treat patients diagnosed with anthrax was 28% greater (P = 0.004) than in the other groups. These results imply that enhancement of knowledge among health care workers may improve their willingness to come to work and treat patients infected with anthrax during a bioterrorism attack. 相似文献
49.
Baršienė J Rybakovas A Garnaga G Andreikėnaitė L 《Environmental monitoring and assessment》2012,184(4):2067-2078
Environmental genotoxicity and cytotoxicity effects in the gills of mussels Mytilus edulis, from the Baltic Sea areas close to the Būtingė oil terminal (Lithuania) before and after accidental oil spill in 31 January
2008 were studied. Mussels from the oil spillage zones were collected in 12 days, in 3 and 6 months after the spill to determine
the effects of the spill. Mussels sampled in 2006–2007 were used for the assessment of the background levels of genotoxicity
and cytotoxicity in the Būtingė oil terminal area. Comparison of the responses in M. edulis before and after the oil spill revealed significant elevation of frequencies of micronuclei (MN), nuclear buds (NB) and fragmented-apoptotic
(FA) cells. Environmental genotoxicity and cytotoxicity levels in mussels from the Palanga site before the accident (in June
2007) served as a reference. Six months after the accident, in July 2008, 5.6-fold increase of MN, 2.9-fold elevation of NB,
and 8.8-fold elevation of FA cells were observed in mussels from the same site. 相似文献
50.
An assessment of metal pollution in surface sediments of Seyhan dam by using enrichment factor, geoaccumulation index and statistical analyses 总被引:3,自引:0,他引:3
The aim of this study was to determine if high concentrations of any heavy metals exist in the sediment of Seyhan Dam reservoir to be considered toxic to the aquatic environment. Surface sediment samples from five stations in the Seyhan dam were collected quarterly from 2004 to 2005 and examined for metal content (Cr, Zn Cu, Mn, Cd, Fe, Ca, K, and Na), organic matter, and grain size. Correlation analyses showed that metal content of Seyhan dam sediment was affected by organic matter and grain size. The results have been compared with values given in the literature. The evaluation of the metal pollution status of the dam was carried out by using the enrichment factor and the geoaccumulation index. A comparison with sediment quality guideline values has also been made. Based on the enrichment factor, dam sediments were treated as a moderately severe enrichment with Cd and minor enrichment with Cr and Mn. The results of geoaccumulation index reveal that sediments of Seyhan Dam were strongly polluted in stations 1, 2, 4, and 5, and were moderately polluted in station 3 with Cd. Moreover, Cd and Cr concentrations in the sediments were above TECs except ERL for Cd. 相似文献