全文获取类型
收费全文 | 71篇 |
免费 | 1篇 |
专业分类
废物处理 | 1篇 |
环保管理 | 13篇 |
综合类 | 18篇 |
基础理论 | 20篇 |
污染及防治 | 7篇 |
评价与监测 | 3篇 |
社会与环境 | 3篇 |
灾害及防治 | 7篇 |
出版年
2023年 | 2篇 |
2022年 | 1篇 |
2021年 | 4篇 |
2020年 | 2篇 |
2019年 | 2篇 |
2018年 | 3篇 |
2017年 | 3篇 |
2016年 | 3篇 |
2015年 | 4篇 |
2014年 | 2篇 |
2013年 | 3篇 |
2012年 | 1篇 |
2011年 | 2篇 |
2010年 | 3篇 |
2009年 | 6篇 |
2008年 | 4篇 |
2007年 | 7篇 |
2006年 | 7篇 |
2005年 | 1篇 |
2004年 | 1篇 |
2002年 | 3篇 |
1999年 | 1篇 |
1997年 | 1篇 |
1995年 | 3篇 |
1992年 | 1篇 |
1986年 | 1篇 |
1956年 | 1篇 |
排序方式: 共有72条查询结果,搜索用时 0 毫秒
71.
Clotilde Biard Nicolas Saulnier Maria Gaillard Jérôme Moreau 《Die Naturwissenschaften》2010,97(11):987-995
In the study of parasite-mediated sexual selection, there has been controversial evidence for the prediction that brighter
males should have fewer parasites. Most of these studies have focused on one parasite species. Our aim was to investigate
the expression of carotenoid-based coloured signals in relation to patterns of multiple parasite infections, to determine
whether colour reflects parasite load of all parasite species, or whether different relationships might be found when looking
at each parasite species independently. We investigated the relationship between bill colour, body mass and plasma carotenoids
and parasite load (feather chewing lice, blood parasite Plasmodium sp., intestinal parasites cestodes and coccidia) in the blackbird (Turdus merula). Bill colour on its own appeared to be a poor predictor of parasite load when investigating its relationships with individual
parasite species. Variation in parasite intensities at the community level was summarised using principal component analysis
to derive synthetic indexes of relative parasite species abundance and absolute parasite load. The relative abundance of parasite
species was strongly related to bill colour, plasma carotenoid levels and body mass: birds with relatively more cestodes and
chewing lice and relatively less Plasmodium and coccidia had a more colourful bill, circulated more carotenoids and were heavier. These results suggest that bill colour
more accurately reflects the relative intensities of parasite infection, rather than one-by-one relationships with parasites
or absolute parasite burden. Investigating patterns of multiple parasite infection would thus improve our understanding of
the information conveyed by coloured signals on parasite load. 相似文献
72.
Augeraud-Veron Emmanuelle Pereau Jean-Christophe 《Environmental Modeling and Assessment》2022,27(4):693-713
Environmental Modeling & Assessment - The design of optimal water policies between farmers, municipalities, and groundwater-dependent ecosystems is analyzed in a hydro-economic model with... 相似文献