搜索结果: 31-45 共查到“国际动态 森林生态学”相关记录51条 . 查询时间(1.438 秒)
Major forest die-offs due to drought, heat, beetle infestations or deforestation could have consequences far beyond the local landscape, results from a new study show.According to a paper published to...
Large forest die-offs can have effects that ricochet to distant ecosystems
Large forest die-offs ricochet distant ecosystems
2016/11/29
Major forest die-offs due to drought, heat and beetle infestations or deforestation could have consequences far beyond the local landscape.Wiping out an entire forest can have significant effects on g...
New insights into the seasonality of Amazon's evergreen forests
seasonality Amazon evergreen forests
2016/3/2
Sometimes you can't see the forest for the trees. In the Amazon, the opposite is true: without truly seeing the trees, you can't "see" the forest and understand the seasonal patterns of photosynthesis...
欧盟在森林高附加值技术开发上取得重要进展
欧盟 森林 技术开发
2014/11/21
森林工业是欧盟经济的重要组成部分。森林不仅是纸浆与造纸和木材加工工业的重要原料来源，而且一系列重要化合物和珍贵活性物质的重要来源地，是人类共同的资源宝库。然而迄今为止，森林的潜在价值远未得到完全开发，甚至被作为废弃物而丢弃浪费。比如，现如今的通用纸浆加工技术，只有不到50%的原料生物质，被转化为纸浆用于造纸，其余超过一半的原料生物质则成为低价值的副产品，造成资源极大浪费。
Harvesting operations will begin in Mumbulla State Forest north east of Bega this week.
The compartments planned for harvesting have a gross area of 441 hectares, of which 243 hectares are available ...
Agriculture Secretary Vilsack Announces Recovery Act Projects for Forest Road Maintenance and Associated Watershed and Ecosystem Restoration
Agriculture Secretary Recovery Act Projects Forest Road Maintenance Ecosystem Restoration
2009/6/3
Agriculture Secretary Tom Vilsack announced today projects funded by the American Recovery and Reinvestment Act (ARRA) for roads maintenance and decommissioning and associated watershed restoration. T...
中越边境维管植物野外考察圆满完成（图）
云南中越边境地区 森林生态系统
2008/11/21
云南中越边境地区是中国面向越南的最前沿地带之一，是中南半岛内陆“绿色大三角洲”地带的重要组成部分。在东南亚热带地区，该地带是目前热带森林生态系统保存最为完整的部分之一。
《自然》：成熟森林在全球碳平衡中具有重要作用（图）
成熟森林 碳平衡 重要作用
2008/9/12
美英等多国科学家近日研究发现，与盛行40余年的传统观点不同，成熟森林（old growth forest）能够几百年不断地持续从大气中吸收二氧化碳，减轻气候变化。相关论文发表在2008年9月11日的《自然》（Nature）杂志上。
森林利用二氧化碳制造有机分子，并储存在组织中。20世纪60年代，一项对单一森林的研究认为，150年以上的森林释放的碳与它们从大气中吸收的一样多，因此被称为“碳中...
通过人工冰冻和电导率的测定，对黄土丘陵沟壑区引种载培的美国黄松、班克松和乡土树种油松的抗寒性进行了鉴定，并探讨其抗寒机理.结果表明，班克松的抗寒性比油松强，而美国黄松的抗寒性比油松稍弱.班克松的束缚水/自由水比值高达7.0，组织中ABA含量高达164.3 μg·g-1 FW；但可溶性糖和K+含量较低，分别为12.0%和2 450 μg·g-1 DW.油松则是可溶性糖、K+和ABA含量都较高，分别为...
俄罗斯平原针－阔林过渡带森林群落组成结构与物种多样性的研究
针阔林过渡区 群落的组成结构 物种多样性 俄罗斯
2007/8/5
摘要：
俄罗斯平原针－阔林过渡带森林群落的物种多样性的研究表明，该地区的物种多样性类同于许多类型的过渡带，即群落的过渡带 (针阔混交林)比相邻群落(针叶林和阔叶林)具有更高的多样性。针阔混交林群落的组成结构较好地反映了其特殊的过渡性。在该过渡带较高的物种多样性并不证明群落稳定性的增加。因此，在探讨多样性与群落稳定性关系时，综合包括均匀度在内的多个指数才可能作出较为客观的结论。
Northern Forests Less Effective Than Tropical Forests in Reducing Global Warming（图）
carbon sink global warming Tropical Forests
2007/7/5
June 21, 2007，Forests in the United States and other northern mid- and upper-latitude regions are playing a smaller role in offsetting global warming than previously thought, according to a study appe...
Michigan State University researchers monitor global climate change（图）
climate change tropical deforestation
2007/5/28
May 27, 2007，EAST LANSING, Mich. — Scientists at Michigan State University’s Global Observatory for Ecosystem Services – or GOES – have a treasure trove of resources many of their peers would envy.
9-Apr-2007,LIVERMORE, Calif. ?How effective are new trees in offsetting the carbon footprint? A new study suggests that the location of the new trees is an important factor when considering such carbo...
11 January 2007，Sections of rainforest used to grow coffee maintain more intact ecosystems than areas cleared for intensive agriculture such as rice-growing or pasture, a study by scientists from Oxfo...
分割亚马孙丛林将威胁鸟类生存
原始森林 鸟类
2007/1/15
据新华社巴西利亚2007年1月12日报道，巴西科学家在最新一期美国《科学》杂志上撰文指出，亚马孙丛林正被人为地分割成若干小块区域，这对地区生态造成严重影响，并威胁到当地鸟类的生存。