全文获取类型
收费全文 | 594篇 |
免费 | 6篇 |
国内免费 | 9篇 |
专业分类
安全科学 | 16篇 |
废物处理 | 25篇 |
环保管理 | 60篇 |
综合类 | 70篇 |
基础理论 | 129篇 |
污染及防治 | 227篇 |
评价与监测 | 45篇 |
社会与环境 | 34篇 |
灾害及防治 | 3篇 |
出版年
2023年 | 9篇 |
2022年 | 13篇 |
2021年 | 15篇 |
2020年 | 6篇 |
2019年 | 17篇 |
2018年 | 21篇 |
2017年 | 16篇 |
2016年 | 21篇 |
2015年 | 14篇 |
2014年 | 41篇 |
2013年 | 57篇 |
2012年 | 48篇 |
2011年 | 49篇 |
2010年 | 30篇 |
2009年 | 31篇 |
2008年 | 35篇 |
2007年 | 42篇 |
2006年 | 24篇 |
2005年 | 25篇 |
2004年 | 17篇 |
2003年 | 14篇 |
2002年 | 10篇 |
2001年 | 7篇 |
2000年 | 13篇 |
1999年 | 5篇 |
1998年 | 2篇 |
1997年 | 3篇 |
1996年 | 5篇 |
1995年 | 2篇 |
1994年 | 3篇 |
1993年 | 2篇 |
1992年 | 2篇 |
1991年 | 2篇 |
1990年 | 1篇 |
1989年 | 1篇 |
1988年 | 3篇 |
1981年 | 1篇 |
1980年 | 1篇 |
1976年 | 1篇 |
排序方式: 共有609条查询结果,搜索用时 156 毫秒
381.
Airam Rodríguez Nick D. Holmes Peter G. Ryan Kerry‐Jayne Wilson Lucie Faulquier Yovana Murillo André F. Raine Jay F. Penniman Verónica Neves Beneharo Rodríguez Juan J. Negro André Chiaradia Peter Dann Tracy Anderson Benjamin Metzger Masaki Shirai Lorna Deppe Jennifer Wheeler Peter Hodum Catia Gouveia Vanda Carmo Gilberto P. Carreira Luis Delgado‐Alburqueque Carlos Guerra‐Correa François‐Xavier Couzi Marc Travers Matthieu Le Corre 《Conservation biology》2017,31(5):986-1001
Artificial lights at night cause high mortality of seabirds, one of the most endangered groups of birds globally. Fledglings of burrow‐nesting seabirds, and to a lesser extent adults, are attracted to and then grounded (i.e., forced to land) by lights when they fly at night. We reviewed the current state of knowledge of seabird attraction to light to identify information gaps and propose measures to address the problem. Although species in families such as Alcidae and Anatidae can be grounded by artificial light, the most affected seabirds are petrels and shearwaters (Procellariiformes). At least 56 species of Procellariiformes, more than one‐third of them (24) threatened, are subject to grounding by lights. Seabirds grounded by lights have been found worldwide, mainly on oceanic islands but also at some continental locations. Petrel breeding grounds confined to formerly uninhabited islands are particularly at risk from light pollution due to tourism and urban sprawl. Where it is impractical to ban external lights, rescue programs of grounded birds offer the most immediate and employed mitigation to reduce the rate of light‐induced mortality and save thousands of birds every year. These programs also provide useful information for seabird management. However, these data are typically fragmentary, biased, and uncertain and can lead to inaccurate impact estimates and poor understanding of the phenomenon of seabird attraction to lights. We believe the most urgently needed actions to mitigate and understand light‐induced mortality of seabirds are estimation of mortality and effects on populations; determination of threshold light levels and safe distances from light sources; documentation of the fate of rescued birds; improvement of rescue campaigns, particularly in terms of increasing recovery rates and level of care; and research on seabird‐friendly lights to reduce attraction. 相似文献
382.
383.
Ramón Aznar Consuelo Sánchez-Brunete Beatriz Albero José Antonio Rodríguez José L. Tadeo 《Environmental science and pollution research international》2014,21(6):4772-4782
This work describes the analysis of 15 pharmaceutical compounds, belonging to different therapeutic classes (anti-inflammatory/analgesics, lipid regulators, antiepileptics, β-blockers and antidepressants) and with diverse physical–chemical properties, in Spanish soils with different farmland uses. The studied compounds were extracted from soil by ultrasound-assisted extraction (UAE) and determined, after derivatization, by gas chromatography with mass spectrometric detection (GC–MS). The limits of detection (LODs) ranged from 0.14 ng g?1 (naproxen) to 0.65 ng g?1 (amitriptyline). At least two compounds where detected in all samples, being ibuprofen, salicylic acid, and paracetamol, the most frequently detected compounds. The highest levels found in soil were 47 ng g?1 for allopurinol and 37 ng g?1 for salicylic acid. The influence of the type of crop and the sampling area on the levels of pharmaceuticals in soil, as well as their relationship with soil physical–chemical properties, was studied. The frequent and widespread detection of some of these compounds in agricultural soils show a diffuse contamination, although the low levels found do not pose a risk to the environment or the human health. 相似文献
384.
385.
María Oliveira Rosa M. Crujeiras Alberto Rodríguez-Casal 《Environmental and Ecological Statistics》2014,21(1):143-159
Smoothing methods and SiZer (SIgnificant ZERo crossing of the derivatives) are useful tools for exploring significant underlying structures in data samples. An extension of SiZer to circular data, namely CircSiZer, is introduced. Based on scale-space ideas, CircSiZer presents a graphical device to assess which observed features are statistically significant, both for density and regression analysis with circular data. The method is intended for analyzing the behavior of wind direction in the atlantic coast of Galicia (NW Spain) and how it has an influence over wind speed. The performance of CircSiZer is also checked with some simulated examples. 相似文献
386.
387.
Nagore Cuevas José Ignacio García Alonso Joana Larreta José Germán Rodríguez Cristina Sariego Izaskun Zorita 《Chemistry and Ecology》2014,30(7):636-642
Imposex and butyltin body burden were assessed in 2011 along the Basque coast (northern Spain) in two gastropod species (Nassarius reticulatus and Nassarius nitidus) four years after an initial survey in 2007. The aim of this re-survey was to monitor the effectiveness of the European ban on the use of tributyltin (TBT) based antifouling paints on ships’ hulls (EC 782/2003). Imposex levels in 2011 were lower than those determined in 2007 at most of the sampling sites. Accordingly, TBT concentrations in the female body burden of Nassarius reticulatus varied from 43 to 250 ng Sn/g in dry weight in 2011, which was a lower maximum than in 2007. Nevertheless, the results for the butyltin degradation index suggest that there have been recent inputs of TBT within the two main Basque harbours. Overall, the legislative measure is contributing to the reduction of TBT effects on the Basque coast although its presence is still evident. 相似文献
388.
389.
A. P. Rodríguez-Troncoso E. Carpizo-Ituarte G. E. Leyte-Morales G. Chi-Barragán O. Tapia-Vázquez 《Marine Biology》2011,158(12):2673-2683
Our understanding of the reproductive biology of corals from the Mexican southeastern Pacific is limited, and consequently, the role of reproduction in structuring coral communities is unclear. As a first attempt to understand the importance of sexual reproduction in structuring and maintaining of the coral communities from this region, we documented the reproductive cycles over 2 years (2003–2004) in three main reef-building corals species in the region. Pocillopora damicornis was shown to be hermaphroditic with asynchronous gamete development observed only in 2004; P. gigantea was characterized as both gonochoric and cosexually hermaphroditic. Absence of mature gametes was documented in both species, and an observation may be attributed to the 2003 El Niño Southern Oscillation event, which may have inhibited reproductive maturation via thermal stress. Porites panamensis was gonochoric with asynchronous development, and planulae were generally brooded. The presence of mature gametes and planulae in P. panamensis polyps suggests that this species is an important contributor to local and, likely, regional recruitment of this species. Further research should seek to identify important source populations for these coral recruits and document the exchange of larvae between coral populations of the Mexican Pacific. 相似文献
390.
Jesús M. Avilés Deseada Parejo Juan Rodríguez 《Behavioral ecology and sociobiology》2011,65(8):1549-1557
In altricial birds, resource allocation during early developmental stages is the result of an interaction between parental
feeding decisions and scramble competition between nestmates. Hatching asynchrony in birds leads to a pronounced age hierarchy
among their offspring. Therefore, whenever parents exert control over resource allocation parents feeding asynchronous broods
should simultaneously assess individual offspring internal condition and age. In this study, we first studied whether the
highly ultraviolet (UV) reflective body skin of nestlings in the asynchronous European Roller (Coracias garrulus; roller hereafter) relates to nestling quality. In a second stage, we experimentally studied parental biases in food allocation
towards senior and junior sibling rollers in relation to a manipulation of UV reflectance of the skin of their offspring.
Heavier roller nestlings had less brilliant and less UV saturated skins than weaker nestlings. In our experiment, we found
that parents with large broods preferentially fed nestlings presenting skin coloration revealing small body size (i.e. control
nestlings) over nestlings presenting skin coloration revealing large body size (i.e. UV-blocked nestlings). Within the brood,
we found that parental food allocation strategy depended on nestling age: parents preferentially fed senior nestlings signalling
small body size, but did not show preference between control and UV-blocked junior nestlings. These results emphasise that
parent rollers use UV cues of offspring quality while balancing the age of their offspring to adjust their feeding strategies,
and suggest that parents may adopt finely tuned strategies of control over resource allocation in asynchronous broods. 相似文献