检索结果-南通市图书馆

Abundance of insects and aerial insectivorous birds in relation to pesticide and fertilizer use

Avian Research 2021年第3期12卷 412-420页

作者： Anders Pape Møller Dorota Czeszczewik Einar Flensted-Jensen Johannes Erritzøe indrikis kra.s Karsten Laursen Wei Liang Wiesław Walankiewicz Ecologie systématique Evolution UniversitéParis-SudCNRSAgroParisTechUniversitéParis-Saclay91405 Orsay CedexFrance Ministry of Education Key Laboratory for Biodiversity science and Ecological Engineering College of Life SciencesBeijing Normal UniversityBeijing 100875China Faculty of Exact and Natural sciences Institute of Biological SciencesSiedlce University of Natural Sciences and Humanitiesul.B.Prusa 1408-110 SiedlcePoland Cypresvej 1 9700 BrønderslevDenmark House of Bird Research Taps6070 ChristiansfeldDenmark Department of Biotechnology Daugavpils UniversityDaugavpils 5401Latvia Department of Bioscience Aarhus UniversityGrenåvej 148410 RøndeDenmark Ministry of Education Key Laboratory for Ecology of Tropical Islands Key Laboratory of Tropical Animal and Plant Ecology of Hainan ProvinceCollege of Life SciencesHainan Normal UniversityHaikou 571158China

Background:The abundance of insects has decreased considerably during recent decades,resulting in current abundance showing 70-80%reductions in more than 15 studies across temperate climate *** reduc-tions in the abundance of insects are likely to have consequences for other taxa at higher trophic levels such as preda-tors and ***,fertilizers and agricultural land use are likely candidates accounting for such reductions in the abundance of ***:Here we surveyed the abundance of flying insects,and the reduction in the abundance of insects as a consequence of intensive reduction in agricultural practice linked to fertilizer use and pesticide *** we dem-onstrated consistency in abundance of birds among study ***:We demonstrated that the use of fertilizers and pesticides had reduced the abundance of insects,with consequences for the abundance of insectivorous bird species such as Barn swallows(Hirundo rustica),House Martins(Delichon urbicum)and swifts(Apus apus).Juvenile Barn swallows were negatively affected by the reduced abundance of insects and hence the reproductive success of insectivorous bird *** effects imply that the abundance of insects could be reduced by the availability of insect ***:These effects of intensive agriculture on insect food abundance are likely to have negative impacts on populations of insects and their avian *** hypothesis was validated by a reduction in the abundance of insects,linked to an increase in the abundance of fertilizers and a general change in farming practice.

关键词： Aerial insectivores Fecundity of insects Insect abundance Insectivores,Insects

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Trade-off between cellular immunity and life span in meal- worm beetles Tenebrio molitor

引用

Current Zoology 2013年第3期59卷 340-346页

作者： indrikis kra.s Janina DAUKsTE Inese KIVLENIECE Ants KAAsIK Tatjana kraMA Todd M. FREEBERG Markus J. RANTALA Institute of systematic Biology University of Daugavpils LV-5401 Daugavpils Latvia Institute of Ecology and Earth sciences University of Tartu 51014 Tartu Estonia Department of Biology University of Turku FIN-20024 Turku Finland Department of Psychology University of Tennessee TN 37996 Knoxville USA

Encapsulation is a nonspecific, cellular response through which insects defend themselves against multicellular pathogens. During this immune reaction, haemocytes recognize an object as foreign and cause other haemocytes to aggregate and form a capsule around the object, often consisting of melanized cells. The process of melanisation is accompanied by the forma- tion of potentially toxic reactive oxygen species, which can kill not only pathogens but also host cells. In this study we tested whether the encapsulation response is costly in mealworm beetles Tenebrio molitor. We found a negative relationship between the duration of implantation via a nylon monofilament and remaining life span. We also found a negative relationship between the strength of immune response and remaining life span, suggesting that cellular immunity is costly in T. molitor, and that there is a trade-off between immune response and remaining life span. However, this relationship disappeared at 31-32 hours of implanta- tion at 25 ± 2℃. As the disappearance of a relationship between duration of implantation and lifespan coincided with the highest values of encapsulation response, we concluded that the beetles stopped investment in the production of melanotic cells, as the implant, a synthetic parasite, was fully isolated from the host＇s tissues .

关键词： Cost of immunity Cellular immunity Encapsulation Lifespan Tenebrio molitor

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Antibacterial Activity of Extracts from some Bryophytes

引用

Advances in Microbiology 2012年第3期2卷 345-353页

作者： Vizma Nikolajeva Ligita Liepina Zaiga Petrina Guntra Krumina Mara Grube indrikis Muiznieks Faculty of Biology University of Latvia Riga Latvia Institute of Microbiology and Biotechnology University of Latvia Riga Latvia

The antimicrobial activity of aqueous and ethanolic extracts of 11 Bryophyta species and 9 Marchantiophyta species collected in Latvia was tested against staphylococcus aureus, Escherichia coli and Bacillus cereus. The extract of Lophocolea heterophylla inhibited the growth of B. cereus, but none of the tested extracts inhibited the growth of E. coli. 70% of bryophyte species demonstrated certain activity in relation to s. aureus. In general, 73% of ethanolic extracts and 39% of aqueous extracts exhibited antibacterial activity against s. aureus. The highest degree of antibacterial activity against s. aureus was shown by the ethanolic extract of Dicranum scoparium and aqueous extracts of Atrichum undulatum and Rhytidiadelphus squarrosus. The bactericidal action was not ascertained. For the first time antimicrobial activity has been proved for three moss species—Eurhynchium angustirete, Rhytidiadelphus squarrosus and Rhodobryum roseum, and for two liverwort species Frullania dilatata and Lophocolea heterophylla. Qualitative and quantitative differences of plant extracts were evaluated by FT-IR spectra.

关键词： Bryophyta Marchantiophyta Antimicrobial Activity

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：