全文获取类型
收费全文 | 219篇 |
免费 | 0篇 |
专业分类
安全科学 | 2篇 |
废物处理 | 9篇 |
环保管理 | 12篇 |
综合类 | 51篇 |
基础理论 | 49篇 |
环境理论 | 1篇 |
污染及防治 | 77篇 |
评价与监测 | 9篇 |
社会与环境 | 9篇 |
出版年
2023年 | 1篇 |
2021年 | 3篇 |
2020年 | 4篇 |
2019年 | 1篇 |
2017年 | 8篇 |
2016年 | 11篇 |
2015年 | 8篇 |
2014年 | 9篇 |
2013年 | 16篇 |
2012年 | 14篇 |
2011年 | 19篇 |
2010年 | 11篇 |
2009年 | 7篇 |
2008年 | 18篇 |
2007年 | 14篇 |
2006年 | 9篇 |
2005年 | 6篇 |
2004年 | 4篇 |
2003年 | 3篇 |
2002年 | 7篇 |
2001年 | 2篇 |
2000年 | 2篇 |
1999年 | 3篇 |
1997年 | 1篇 |
1996年 | 2篇 |
1995年 | 3篇 |
1994年 | 4篇 |
1993年 | 5篇 |
1992年 | 2篇 |
1991年 | 1篇 |
1990年 | 1篇 |
1989年 | 1篇 |
1985年 | 1篇 |
1984年 | 1篇 |
1983年 | 1篇 |
1982年 | 1篇 |
1981年 | 2篇 |
1977年 | 1篇 |
1971年 | 1篇 |
1967年 | 1篇 |
1963年 | 2篇 |
1959年 | 1篇 |
1958年 | 1篇 |
1953年 | 1篇 |
1949年 | 1篇 |
1941年 | 2篇 |
1939年 | 1篇 |
1920年 | 1篇 |
排序方式: 共有219条查询结果,搜索用时 31 毫秒
121.
Ten adult male loggerhead sea turtles, captured by trawlers or dip nets, were satellite-tracked from a neritic foraging ground in the Mediterranean in order to investigate adult spatio-temporal distribution and breeding migration. Five individuals migrated to potential breeding sites in Libya and one to Greece. The results complement previous studies and show that: (1) the Tunisian shelf may be more important for turtles from Libyan rookeries than previously thought; (2) male tracks corroborate a conservation hotspot previously identified for juveniles; (3) the north African coast represents a preferred migratory corridor, unless open sea routes are more direct; (4) adult males may exhibit high fidelity to relatively small areas, without evident seasonal differences; (5) adults home ranges were smaller and more neritic than juveniles frequenting the same area; (6) males may frequent multiple courtship areas; (7) the average remigration interval of males frequenting this region is longer than 1 year. 相似文献
122.
Recent studies have emphasised that organisms can experience physiological stress well within their geographic range limits. Developing methods for mechanistically predicting the presence, absence and physiological performance of organisms is therefore important because of the ongoing effects of climate change. In this study, we merged a biophysical–ecological (BE) model that estimates the aquatic (high tide) and aerial (low tide) body temperatures of Mytilus galloprovincialis with a Dynamic Energy Budget (DEB) model to predict growth, reproduction and mortality of this Mediterranean mussel in both intertidal and subtidal environments. Using weather and chlorophyll-a data from three Mediterranean sites along the Italian coasts, we show that predictions of sublethal and lethal (acute) stress can potentially explain the observed distribution (both presence and absence) of mussels in the intertidal and subtidal zones, and the maximum size of animals in the subtidal zones. Importantly, our results suggest that different mechanisms limit the intertidal distribution of mussels, and that these mechanisms do not follow a simple latitudinal gradient. At the northernmost site (Palermo), M. galloprovincialis appears to be excluded from the intertidal zone due to persistent exposure to lethal aerial temperatures, whereas at the southernmost sites (Porto Empedocle and Lampedusa) sublethal stress is the most important driver of mussel intertidal distribution. Our predictions provide a set of hypotheses for future work on the role of climate change in limiting intertidal distribution of mussels in the Mediterranean. 相似文献
123.
Dr Anna Soler Aurora Sánchez Ana Carrió Cèlia Badenas Montserrat Milà Antoni Borrell 《黑龙江环境通报》2003,23(4):319-322
We describe the finding of three cell lines involving different structural abnormalities of chromosome 8 detected in a prenatal diagnosis. Chorionic villi sampling (CVS) was performed on a pregnant woman because of advanced maternal age. Semidirect cytogenetic analysis showed a mos46,XX,i(8q)/46,XX,del(8)(p11.2) karyotype, confirmed by fluorescence in situ hybridization (FISH). Amniocentesis was subsequently performed, and the karyotype obtained was 46,XX,dup(8)(p23p11.2). The pregnancy was terminated; pathologic findings included clubfeet, clenched left hand, subcutaneous edema and bilateral hydrocephalus. Molecular studies using chromosome 8 microsatellites performed on parents' blood and fetal tissues revealed a maternal meiotic origin of the inv dup(8p) with deletion of the distal p23 region and duplication of the remaining 8p. We propose a model to explain the cytogenetic findings, which includes a first maternal meiotic error giving rise to a large dicentric isochromosome 8 present in the ovum, a second error in one of the first zygote divisions with misdivision of the dicentric 8 giving rise to a cell line with del(8p) confined to the trophoblast and another cell line with inv dup(8p) confined to the fetal tissue and a third error in the trophoblast giving rise to a further cell line with isochromosome 8q. Copyright © 2003 John Wiley & Sons, Ltd. 相似文献
124.
125.
Cristiano Bertolucci Mauro Leorati Augusto Innocenti Augusto Foà 《Behavioral ecology and sociobiology》1999,46(3):200-209
The daily pattern of locomotor activity of Podarcis sicula in the field changes from unimodal in spring to bimodal in summer, becoming unimodal again in autumn. Short-term experiments
in which P. sicula collected in different months were tested under constant conditions immediately after capture showed that the activity pattern
typical of each season is retained in the lizard circadian locomotor rhythm. In constant conditions, the bimodal pattern is
associated with a short free-running period (τ) of the circadian locomotor rhythm and a long circadian activity (α), while
the unimodal pattern is associated with a long τ and short α. To test whether seasonal changes in circadian locomotor rhythms
are driven by a circannual clock, we recorded locomotor activity of lizards over 12–15 months in constant temperature and
darkness. The present results demonstrate, for the first time in a vertebrate, the existence of circannual changes in constant
darkness of both τ and α. In most lizards, the longest τ along its circannual cycle is associated with a short α, and the
shortest τ in the same cycle with a long α, so that the pattern of mutual association between τ and α is the same as in short-term
experiments. Most lizards, however, stayed unimodal all the time. This shows that changes in activity pattern from unimodal
to bimodal (and vice versa) are induced by seasonal changes in environmental factors, instead of being incorporated into a
circannual rhythm. Circannual changes in τ and α of locomotor rhythms may adaptively predispose the circadian system of P. sicula to a change in activity pattern as soon as seasonal changes in the environment demand it.
Received: 22 January 1999 / Received in revised form: 14 April 1999 / Accepted: 19 April 1999 相似文献
126.
Eva Ramírez-Llodra Manuel Ballesteros Joan B. Company Luis Dantart Francisco Sardà 《Marine Biology》2008,153(3):297-309
The spatio-temporal variations in diversity, biomass and abundance of bathyal invertebrates (excluding decapod crustaceans,
which have been analysed elsewhere) from the North-western Mediterranean margin are described. The upper canyon (∼450 m),
middle slope (∼650 m) and lower slope (∼1,200 m) habitats were investigated throughout the year. The first two sites are visited
daily by a specialised commercial fisheries’ fleet, while the deeper site has not been impacted by fishing activities. A total
of 140 species from 12 phyla were collected from the 3 study areas. Of these, the Mollusca, Echinodermata, Polychaeta and
Cnidaria were the most speciose groups. The patterns of species diversity (H′) and evenness (E) were similar in time and space. The upper canyon and middle-slope sites were dominated by echinoderms and molluscs, while
the lower-slope site was dominated by cnidarians and sponges. Multifactorial ANOVA showed significant spatio-temporal differences
in the biomass and/or abundance only in echinoderms, molluscs, cnidarians and polychaetes. The faunal differences observed
were explained by habitat type, but not by season. The role of submarine canyons and commercial fishing on shaping the diversity
and biomass of bathyal Mediterranean invertebrates is discussed.
Luis Dantart: Deceased March 2005 相似文献
127.
G. Sarà C. Romano M. De Pirro P. H. Halldòrson M. Sprovieri P. Rumolo A. Mazzola 《Marine Biology》2008,154(1):191-198
The transfer of peat organic matter (OM) from tidal pools of upper littoral to downstream rocky shores and its potential incorporation
into marine biota were investigated using the stable isotope approach. Samplings were carried out in September 2004 in two
SW Icelandic sites (Osar and Hvassahraun), where we selected (1) areas with shores where grass gently declined towards rocks
and, on reaching the sea line, formed small tidal peat pools and (2) areas where grass and rocky shores were not contiguous,
rather the grass lower limits were several hundreds of meters back from the shore. In both grass and no grass areas, in the
intertidal zone, all benthic organisms and all potential OM sources were sampled. Dominant macroalgae were Ascophyllum nodosum ([Linnaeus] Le Jolis) and Fucus vesiculosus Linnaeus. In grass sites, organisms partially reflected the isotopic composition of peat OM, while in no grass sites, peat
represented only a negligible amount of available OM, or its signal was totally absent from the environment. Intertidal organisms
could rely on peat both directly by suspension feeding, grazing or scavenging and indirectly by predation (crabs) on low level
consumers (barnacles). 相似文献
128.
Gvozdjáková Anna Sumbalová Zuzana Kucharská Jarmila Rausová Zuzana Kovalčíková Eleonóra Takácsová Timea Navas Plácido López-Lluch Guillermo Mojto Viliam Palacka Patrik 《Environmental science and pollution research international》2023,30(6):14200-14211
Environmental Science and Pollution Research - European Association of Spa Rehabilitation (ESPA) recommends spa rehabilitation for patients with post-COVID-19 syndrome. We tested the hypothesis... 相似文献
129.
Maria Cristina Collivignarelli Alessandro Abbà Sabrina Sorlini Matteo Bruggi 《Journal of Material Cycles and Waste Management》2017,19(4):1374-1383
The aim of this work was to evaluate the use of solid residues derived from municipal solid waste-derived solid recovered fuel incinerated in a circulating fluidized-bed boiler for concrete production. The concrete mixtures casted by partially replacing the natural aggregates with bottom ash (27 %) and exhausted sand (13 %), according to the European standards for concrete, may be classified in the C16/20 class. The leaching tests performed on monolithic concrete samples showed that the concentrations measured in the leachates were lower than limit values for waste recovery, with the only exception of nickel for the mixture made with the exhausted sand. 相似文献
130.
Vítězslav Plášek Arkadiusz Nowak Marcin Nobis Grzegorz Kusza Katarzyna Kochanowska 《Environmental monitoring and assessment》2014,186(12):8943-8959
Road traffic emits a cocktail of pollutants that can influence the vegetation and plant diversity in neighboring areas. However, the recovery potential of bryophytes after traffic abandonment is still little explored. In addition, the effects of the main pollutants of road verges, such as metals and salinity, on moss flora need to be investigated. In our study, we compared the moss richness and diversity in two closely related veteran tree allees of high conservation importance. The allees in Gry?ów and Lubrza, Poland, were chosen because of their similarity in age, geographical location, type of surrounding areas, and tree species. The only difference was that the trees in Gry?ów had not been exposed to direct road pollution for almost 30 years. The moss richness and diversity differed significantly between the sites. Altogether, 20 moss species were recorded on 229 trees, 17 species in Gry?ów (abandoned road), and 13 in Lubrza (busy road). We found considerable differences between moss cover on the road-facing and opposite sides of tree trunks. In Lubrza, mosses on the road-facing side were very scarce. The moss cover in Gry?ów was highly balanced between trunk sides as well as among trunk heights. Typical epiphytic species such as Bryum moravicum, Dicranoweisia cirrata, Leskea polycarpa, and Orthodicranum tauricum preferred the Gry?ów tree stands, where they were present in numbers almost twice as high as that at Lubrza. The study shows that constructing a bypass road could be an effective conservation measure for veteran tree protection with their epiphytic moss flora. 相似文献