期刊文献+
共找到2篇文章
< 1 >
每页显示 20 50 100
桉农间作系统树影变化特征研究
1
作者 林培群 余雪标 +1 位作者 李叶 曹磊 《热带生物学报》 2010年第1期37-40,共4页
笔者研究了桉农间作系统树影的变化特征,为寻找出一种桉农间作模式,促进桉树林地的可持续生产,又能在一定程度上缓解我国土地资源紧缺的矛盾。结果表明:正东西走向大宽行桉农间作模式能使系统内遮荫程度尽量地减小,能使光照资源最大程... 笔者研究了桉农间作系统树影的变化特征,为寻找出一种桉农间作模式,促进桉树林地的可持续生产,又能在一定程度上缓解我国土地资源紧缺的矛盾。结果表明:正东西走向大宽行桉农间作模式能使系统内遮荫程度尽量地减小,能使光照资源最大程度进入农作物间作带,满足间作物对光热资源的需求。 展开更多
关键词 桉农间作 树影变化 特征
下载PDF
How will climate change affect the potential distribution of Eurasian tree sparrows Passer montanus in North America?
2
作者 Jim GRAHAM Catherine JARNEVICH +2 位作者 Nick YOUNG Greg NEWMAN Thomas STOHLGREN 《Current Zoology》 SCIE CAS CSCD 北大核心 2011年第5期648-654,共7页
Habitat suitability models have been used to predict the present and future potential distribution of a variety of spe- cies. Eurasian tree sparrows Passer montanus, native to Eurasia, have established populations in ... Habitat suitability models have been used to predict the present and future potential distribution of a variety of spe- cies. Eurasian tree sparrows Passer montanus, native to Eurasia, have established populations in other parts of the world. In North America, their current distribution is limited to a relatively small region around its original introduction to St. Louis, Missouri. We combined data from the Global Biodiversity Information Facility with current and future climate data to create habitat suitability models using Maxent for this species. Under projected climate change scenarios, our models show that the distribution and range of the Eurasian tree sparrow could increase as far as the Pacific Northwest and Newfoundland. This is potentially important in-formation for prioritizing the management and control of this non-native species [Current Zoology 57 (5): 648--654, 2011]. 展开更多
关键词 Eurasian tree sparrows Passer montanus MAXENT Climate change Distribution model
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部