搜索结果: 61-75 共查到“国际动态 林学”相关记录350条 . 查询时间(1.172 秒)
Sea otters keep remaining California kelp forests alive(图)
Sea otters keep remaining California kelp forests alive
2021/4/9
Sea otters have long been recognized as a classic example of a keystone species, a dominant predator that maintains the balance of kelp forest ecosystems by controlling populations of sea urchins, whi...
《自然》最新论文:植物和土壤或能互换储碳能力
植物 土壤 互换储碳
2021/3/25
国际著名学术期刊《自然》最新发表一篇气候变化研究论文,研究人员开展一项针对100多个实验的分析研究显示,当二氧化碳水平升高导致植物生物量增加时,土壤能够储存的碳量反而会减少。该论文称,由于当前的陆地碳汇模型并没有计入这种此消彼长的关系,因此未来的预测数据可能需要修改。
Scientists link flower color changes with climate fluctuations(图)
Scientists link flower color changes climate fluctuations
2021/3/26
Scientists at Clemson University have linked climate fluctuations over the past one and one-quarter centuries with flower color changes.Researchers combined descriptions of flower color from...
美国林务局《国家环境政策法案》实施条例出现重大变化
美国林务局 《国家环境政策法案》 实施条例 变化
2021/4/2
美国林务局当日发布《国家环境政策法案》(NEPA)实施条例。条例中的最后一项条款包含了重大变化,确定了新的分类排除,允许在一定条件下使用已有的环境分析和评估结果支持制定新的决策,从而减少重复工作。
Seeing the forest for the shrubs in southern Appalachia(图)
Seeing shrubs southern Appalachia
2021/3/12
As ecosystems respond to human activity, what species will emerge as new trailblazers, shaping the diversity and resilience of these changing environments? And how can land managers identify these spe...
国际最新研究:欧洲森林或因气候驱动自然干扰失去逾半生物量
欧洲森林 气候驱动 自然干扰 生物量
2021/2/25
施普林格·自然旗下国际学术期刊《自然-通讯》最新发表一项环境研究论文称,欧洲森林可能会因气候驱动的自然干扰失去一半以上的生物量,这些自然干扰包括火灾、强风、虫灾等,或其任意组合。
以色列自然和公园管理局徽章动物:努比亚山羊(图)
努比亚山羊 沙漠栖息 野生动物
2021/1/28
努比亚山羊(Nubian ibex)属于沙漠栖息野生动物,生活在非洲东部和东北部以及中东地区的山地,目前其总数不足3000只,它们中约50%分3个种群,分布在以色列的犹大沙漠(部分为巴勒斯坦C区)、内盖夫山区和埃拉特地区。
Colorado mountains bouncing back from acid rain effects(图)
Colorado mountains bouncing acid rain effects
2021/1/8
A long-term trend of ecological improvement is appearing in the mountains west of Boulder, Colorado. Researchers at the University of Colorado Boulder found that Niwot Ridge, a high alpine a...
Soil carbon changes in transition areas suggest Amazon conservation outlook(图)
Soil carbon changes transition areas Amazon conservation outlook
2020/11/20
Conservation efforts on the edges of the Amazon forest, especially in light of recent deforestation by human disturbance, could help the region weather climate change, researchers say.That assessment ...
A new study by scientists at the Cornell Lab of Ornithology and other institutions confirms that most birds -- but not all -- synchronize their migratory movements with seasonal changes in v...
Few places on Earth are as rich in biodiversity, and as removed from human influence, as the world's largest rainforest -- the Amazon. Scientists at Louisiana State University have been cond...
世界最高树木吸碳能力超估算
世界 最高树木 吸碳能力 超估算
2020/10/19
美国和英国研究人员用激光测量后发现,世界最高树木重量远高于原来估算,吸收的碳元素也比原来估算多。据英国《泰晤士报》16日报道,英国伦敦大学学院和美国马里兰大学研究人员用激光测量美国加利福尼亚州北部生长的红杉后得出上述结论。红杉是世界上最高的树种。研究人员测量发现,一株名为“阿姆斯特朗上校”的老红杉高88米、重110吨,而原来估算重量是70吨至90吨。与先前测量技术相比,激光测量结果更准确。
Statement on the Nobel Prize for Economics 2020(图)
Wildfires changing forest communities interior Alaska
2020/10/16
As boreal forest wildfires increase in severity and frequency, new patterns of post-fire recovery are emerging. Research led by Jill Johnstone and colleagues at the U.S. National Science Foundati...
Forest margins may be more resilient to climate change than previously thought(图)
Forest margins resilient climate change previously thought
2020/10/10
A warming climate and more frequent wildfires do not necessarily mean the western United States will see the forest loss that many scientists expect.Dry forest margins, areas where forest meets sagebr...
《自然》发文反思澳洲灾难性林火
《自然》 澳洲 灾难性林火
2020/8/18
英国《自然》杂志2020年8月12日发表的一篇时评文章中,澳大利亚塔斯马尼亚大学科学家戴维·布朗及其同事反思了澳洲林火,并指出:澳大利亚需要一个专门的全国性林火监测机构,以具有成本效益和循证的方式提供必要的明确信息,用于管理和缓解火灾。2019年至2020年,澳大利亚的林火摧毁了成千上万的房屋和数百万公顷的植被,被称为是澳大利亚建国以来最严重的“灾难性林火”。高温天气和干旱是林火肆虐的主要原因,从...