搜索结果: 46-60 共查到“国际动态 林业基础学科”相关记录125条 . 查询时间(2.213 秒)
世界上最古老的树木也非长生不老（图）
世界上 最古老 树木 长生不老
font style='font-size:12px;'>
2020/7/28
地球上最古老的树木已经屹立了近5000年，研究人员一直想知道这些古老的生物会在多大程度上衰老、机体会如何随年龄的增长而退化。最近发表的一篇研究世界上最长寿树木之一银杏树的论文甚至发现，银杏树或能“在整个植物层面上避免衰老”，这就提出了一个问题，即百年老树明显没有衰老。然而，7月27日发表在Cell Press细胞出版社旗下期刊 Trends in Plant Science（《植物学趋势》）上的文...
Lightning strikes more than 100 million times per year in the tropics（图）
Lightning strikes 100 million times per year tropics
font style='font-size:12px;'>
2020/7/31
Scientists at the Smithsonian Tropical Research Institute in Panama have published dramatic maps showing the locations of lightning strikes across the tropics.Based on ground and satellite d...
河流植物是水文变化的“天然缓冲器”
河流植物 水文变化 天然缓冲器
font style='font-size:12px;'>
2020/7/24
近日，荷兰、英国和比利时科学家合作在《皇家学会学报B：生物科学》共同发表最新研究成果，称通过生物物理反馈机制和水生植被自组织产生的流量调节，河流植物既可以抵抗洪水，又可以防止干涸，从而保护了生物多样性。研究团队首席科学家洛瑞塔·考纳齐亚称：“它们为水文变化提供了天然的缓冲器。”通过将数学模型与现场数据相结合，该团队得出了三条结论：一是，植被生长和局部流速之间的反馈产生了一个自组织过程，该过程使植被...
Warming reduces trees' ability to slow climate change（图）
Warming reduces trees ability slow climate change
font style='font-size:12px;'>
2020/7/10
The world's forests play an important role in mitigating climate change. Trees are carbon sinks -- they absorb more carbon dioxide than they emit. But according to new National Science Foundation...
Bedrock type under forests greatly affects tree growth, species, carbon storage（图）
Bedrock type under forests greatly tree growth species carbon storage
font style='font-size:12px;'>
2020/6/19
A forest's ability to store carbon depends on the bedrock beneath, according to Penn State researchers who studied forest productivity and composition and the physical characteristics of roc...
Nature's 'slow lanes' offer hope for species feeling heat of climate change, other pressures（图）
Nature slow lanes offer hope species feeling heat climate change other pressures
font style='font-size:12px;'>
2020/6/19
Pockets of landscape less prone than adjacent areas to disturbances such as fire and drought may hold the key for scientists, conservationists and land managers seeking to preserve vulnerable species ...
海平面上升威胁红树林（图）
海平面上升 红树林
font style='font-size:12px;'>
2020/6/8
近日，一项新研究分析了全新世冰川消退对红树林生长的影响，让人们得以一窥生态系统将如何应对未来迅速上升的海平面。澳大利亚麦考瑞大学、美国罗格斯大学等机构研究人员在《科学》杂志上发表论文称，如果温室气体排放不减少，到2050年，红树林将无法承受海平面上升之重。红树林主要分布在温暖气候地区，是宝贵的沿海生态系统。红树林储存了大量的碳，有助于保护海岸线，为鱼类和其他物种提供栖息地。研究人员利用过去1万年的...
Long-lived tropical trees play outsized role in carbon storage（图）
Long-lived tropical trees outsized role carbon storage
font style='font-size:12px;'>
2020/4/17
Trees that grow fast, live long lives and reproduce slowly account for the bulk of the biomass -- and carbon storage -- in some tropical rainforests, a team of scientists reports in a paper published ...
The life and death of one of America's most mysterious trees（图）
life and death America mysterious trees
font style='font-size:12px;'>
2020/3/27
A majestic ponderosa pine, standing tall in what is widely thought to have been the "center of the world" for the ancestral Puebloan people, may have more mundane origins than previously believed, acc...
Not falling far from the tree: Ecologists study seed-to-seedling transition（图）
tree Ecologists study seed-to-seedling transition
font style='font-size:12px;'>
2020/3/6
Why are there so many species of plants? Why do some plants thrive, while others don't?Ecologist Noelle Beckman of Utah State University and her colleagues explore these questions in new fin...
Hurricanes fertilize mangrove forests, shape Florida Everglades（图）
Hurricanes mangrove forests shape Florida Everglades
font style='font-size:12px;'>
2020/2/28
The destructive power of a hurricane appears to be good news for mangroves in the Florida Everglades.When Category 3 hurricanes Wilma (2005) and Irma (2017) struck Florida, mangroves took a beating, e...
Genetic modification of poplar trees saves air quality（图）
Genetic modification poplar trees air quality
font style='font-size:12px;'>
2020/1/19
Poplar trees are widely used in commercial products, but, like several other tree species, they emit gases to the atmosphere that worsen air pollution and alter climate. Now field trials in Oregon and...
Malaria in the Amazon increases with deforestation（图）
Malaria Amazon deforestation
font style='font-size:12px;'>
2020/1/19
A study by NSF-funded scientists Andy MacDonald at UC Santa Barbara and Erin Mordecai at Stanford found a direct relationship between deforestation in the Amazon and the transmissi...
Forests face climate change competition（图）
Forests climate change competition
font style='font-size:12px;'>
2020/1/21
In a world with rising levels of atmospheric carbon dioxide, experiments have shown that increased CO2 allows plants to photosynthesize more and use less water; however, warmer temperatures drive plan...
Catastrophic events carry forests of trees thousands of miles to burial at sea（图）
Catastrophic events forests rees thousands miles to burial at sea
font style='font-size:12px;'>
2019/11/5
Flooding from torrential rains caused by cyclones and monsoons, as well as other catastrophic events, may move huge amounts of fresh wood to watery graves deep under the ocean, scientists have discove...