检索结果-南通市图书馆

Research on retention forestry in Northern Europe

Ecological Processes 2020年第1期9卷 33-45页

作者： lena gustafsson Mats Hannerz Matti Koivula Ekaterina Shorohova Ilkka Vanha-Majamaa Jan Weslien Department of Ecology Swedish University of Agricultural SciencesP.O Box 7044SE-75007 UppsalaSweden Silvinformation AB Bergauddsvägen 22BSE-39359 KalmarSweden School of Forest Sciences University of Eastern FinlandP.O.Box 111FI-80101 JoensuuFinland Forest Research Institute of the Karelian Research Centre Russian Academy of SciencesPushkinskaya str.11Petrozavodsk 185910Russia Natural Resources Institute Finland(Luke) Latokartanonkaari 9FI-00790 HelsinkiFinland Saint-Petersburg State Forest Technical University Institutsky str.5Saint Petersburg 194021Russia The Forestry Research Institute of Sweden(Skogforsk) SE-75183 UppsalaSweden.

Retention approaches in forest management are today common in several North European countries,integrated into the clearcutting practice as a way to promote biodiversity and maintain ecosystem *** green trees and retention patches(tree groups)are retained at final harvest,and deadwood is left at site or ***,we review research on retention in Sweden,Finland,Norway,the Baltic States,and NW Russia,with special focus on *** the first publication in 1994,about 180 peer-reviewed articles have been *** present results from a systematic search of the retention literature,separated into the following topics:buffer zones,retention patches,high stumps,other types of deadwood,European aspen Populus tremula,and *** literature is synthesized separately since studies from this region have so far almost exclusively been published in the Russian ***,we describe six ongoing large-scale,replicated experiments with varying retention levels,five in Finland and one in Sweden,and summarize their main *** main conclusions for practice from the literature and experiments are that retention patches as large as 0.5 ha and 10-mwide buffers to watercourses are not enough to maintain pre-harvest species composition but survival of forest species is still larger than on conventional *** on clearcuts may present important habitats to saproxylic species,including rare and red-listed ones and a prioritization of tree species per stand is *** identify several important future research directions including switch of focus towards the landscape as well as the species population *** in parts of European Russia where retention has been unintentionally implemented already for a century would indicate possible future trajectories of biodiversity and their drivers in other regions of Northern Europe.A stronger link to ecological theory would help in study designs and in th

关键词： Biodiversity Buffer strips Conservation Deadwood Experiments Forestry High stumps Retention patches Variable retention

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

Sex differences and effects of oestrogen in rat gastric mucosal defence

引用

World Journal of Gastroenterology 2017年第3期23卷 426-436页

作者： Richard Shore Hakan Bjorne Yoko Omoto Anna Siemiatkowska Jan-Ake gustafsson Mats Lindblad lena Holm Department of Clinical Sciences Intervention and Technology(CLINTEC)Karolinska InstitutetS-14186 StockholmSweden Function Perioperative Medicine and Intensive Care Karolinska University HospitalS-17176 StockholmSweden Department of Physiology and Pharmacology Karolinska InstitutetS-17177 StockholmSweden Department of Endocrine and Breast Surgery Graduate School of Medical ScienceKyoto Prefectural University of Medicine 465 Kajii-choHirokoji AgaruKawaramachi-doriKamigyo-kuKyoto 602-0841Japan Department of Medical Cell Biology Uppsala UniversityS-75123 UppsalaSweden Center of Nuclear Receptors and Cell Signalling University of HoustonHoustonTX 77004United States Department of Clinical Sciences Intervention and Technology(CLINTEC)Karolinska InstitutetS-14186 StockholmSweden

AIM To evaluate sex differences and the effects of oestrogen administration in rat gastric mucosal *** Sex differences in gastric mucus thickness and accumulation rate, absolute gastric mucosal blood flow using microspheres, the integrity of the gastric mucosal epithelium in response to a chemical irritant and the effects of oestrogen administration on relative gastric mucosal blood flow in an acute setting was assessed in an in vivo rat experimental model. Subsequently, sex differences in the distribution of oestrogen receptors and calcitonin gene related peptide in the gastric mucosa of animals exposed to oestrogen in the above experiments was evaluated using *** The absolute blood flow in the GI-tract was generally higher in males, but only significantly different in the corpus part of the stomach (1.12 ± 0.12 m L/min·g in males and 0.51 ± 0.03 m L/min·g in females) (P = 0.002). After removal of the loosely adherent mucus layer the thickness of the firmly adherent mucus layer in males and females was 79 ± 1 μm and 80 ± 3 μm respectively. After 60 min the mucus thickness increased to 113 ± 3 μm in males and 121 ± 3 μm in females with no statistically significant difference seen between the sexes. Following oestrogen administration(0.1 followed by 1 μg/kg·min), mean blood flow in the gastric mucosa decreased by 31% [68 ± 13 perfusion units (PFU)] in males which was significantly different compared to baseline(P = 0.02). In females however, mean blood flow remained largely unchanged with a 4% (5 ± 33 PFU) reduction. The permeability of the gastric mucosa increased to a higher level in females than in males (P = 0.01) after taurocholate challenge. However, the calculated mean clearance increase did not significantly differ between the sexes [0.1 ± 0.04 to 1.1 ± 0.1 m L/min·100 g in males and 0.4 ± 0.3 to 2.1 ± 0.3 m L/min·100 g in females(P = 0.065)]. There were no significant differences between 17β-Estradiol treated males (me

关键词： Sex differences Gastric mucosal defence Blood flow Oestrogen Gastric physiology Mucus

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

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

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：