Results 51 to 60 of about 6,364 (158)

Soil Quality Assessment of Five Typical Forest Stands in the Dianchi Lake Basin based on MDS [PDF]

open access: yes
[Objective] Soil quality is a critical indicator of ecosystem health and sustainable land management. [Methods] Key soil quality indicators (e.g., organic matter, total nitrogen, available nitrogen, capillary porosity, and pH) were identified through ...
HUANG Shuai   +4 more
core   +1 more source

Primary saltmarsh succession on a tropical coral island in the South China Sea: Human influences initiate and accelerate the process of succession

open access: yesEcological Solutions and Evidence, Volume 6, Issue 2, April–June 2025.
Pioneer grass species rapidly colonized the site within 1 year following land reclamation, with a grass‐to‐shrub transition concurrently with dike construction, indicating a clear trajectory of species establishment and development in a newly formed saltmarsh.
Deyi Yin   +4 more
wiley   +1 more source

西藏草地生态系统植被碳贮量及其影响因子分析

open access: yesShuitu Baochi Xuebao, 2008
在广泛收集资料的基础上,利用平均碳密度方法,估算了西藏草地生态系统中17类草地植被的碳贮量,并分析了其影响因子。结果表明:(1)17类草地植被总面积为8 205.194×10~4hm~2,草地植被总碳贮量为189.367 TgC,草地植被平均碳密度为2.308 t/hm~2,不同草地植被类型差异较大,在0.396~20.471 t/hm~2之间波动;(2)从区域分布来看,阿里、那曲、日喀则3地区,既是西藏草地主要的分布区,分布面积占西藏草地总面积的84.156%,又是西藏草地生态系统碳贮量的主要贮藏库 ...
王建林   +4 more
doaj  

Conservation Gap Within a Nature Reserve: A Case Study in the Biodiversity Hotspot of Rare and Endangered Plants at the Southern Gaoligong Mountains 高黎贡山南段稀有濒危植物保护空缺分析

open access: yesIntegrative Conservation, Volume 4, Issue 1, Page 71-84, March 2025.
Gaoligong Mountain is home to a large number of rare and endangered species, but the effectiveness of conservation measures in the Gaoligong Mountain Nature Reserve remains uncertain. We predicted the potential distribution areas of 361 rare and endangered wild plants in southern Gaoligong Mountain under current and future climate change scenarios and ...
Yong‐Jing‐Wen Yang   +3 more
wiley   +1 more source

Endemic plants in coastal zone and islands in South China and construction of vegetation landscape on islands [PDF]

open access: yes, 2015
我国南方海岸带及海岛有丰富的植物资源。在海岸带及海岛大开发的背景下,植物资源的保护和合理利用在构建生态安全屏障、绿化和美化方面具有举足轻重的地位。由于生境特殊,海岸带及海岛植物具有特有种比例高和分布区狭窄的特点。在自然因素和人为因素的双重作用下,我国南方海岸带及海岛植物资源正在经历大规模的衰退。此外,土壤盐渍化、盐雾、干旱及大风等不利环境条件给沿海防护林建设、城镇和道路绿化、海岛植被修复等带来了诸多困难,盐害问题日益突出。抗风、耐土壤盐、耐盐雾植物资源的筛选和利用,以提高存活率 ...
张琳婷
core  

古尔班通古特沙漠人工林土壤水分及其影响因素 [PDF]

open access: yes, 2009
通过2004年2~12月对古尔班通古特沙漠南缘2年生人工梭梭和沙拐枣混交林内3条典型坡面土壤水分进行了系统监测与研究。结果表明:人工林土壤水分状况受季节性降水、人工林种植密度、地形因子的影响而出现明显的时空分异。在空间上将土壤水分变化划分为三层,0~30cm为活跃层,30~60 cm为次活跃层,60~120 cm为相对稳定层。通过主成分分析,得出地形因子、种植密度对0~30 cm土层土壤水分的影响次序为坡度>坡向>种植密度>高程,30~60 cm土层为坡向>种植密度>坡度>高程,60~120 ...
付恒飞, 宋春武, 蒋进, 陈钧杰
core  

The Spatio-temporal Evolution of NDVI in the Three Gorges Reservoir Area Driven by the Synergistic Effect of two Factors over the Past 21 Years [PDF]

open access: yes
[Objective] To clarify the spatio-temporal characteristics of vegetation evolution in the Three Gorges Reservoir Area, and to quantitatively analyze the relationships between vegetation and key determinants, including climate, terrain, and human ...
LI Cheng   +5 more
core   +1 more source

Structure Genetic Mechanism and Provenance Analysis of Badain Jaran Desert, Northwest China [PDF]

open access: yes, 2015
由于长期构造地质作用,我国西北部地区变得气候持续干旱,生态极为脆弱。生态系统的不断恶化,加上人为因素的影响,塔克拉玛干、腾格里、毛乌素、巴丹吉林沙漠等沙漠化形势越来越严峻,尤其每年冬春季节将频发沙尘暴活动,严重影响了人民群众的正常生活。而巴丹吉林沙漠正好地处我国东、西部沙区之间的过渡敏感地带,以发育有复杂高大沙山,分布着星罗棋布的湖泊而闻名于世,具有较高的学术研究价值,一直以来倍受中外学者的高度重视和关注。 迄今为止,学术研究主要关注点在沙漠物源、成因机理、侵蚀过程和治理方法等方面 ...
韩超
core  

高寒草地植被与土壤水源涵养功能的时空耦合关系

open access: yesShuitu Baochi Xuebao, 2023
探究草地植被格局与土壤水源涵养功能的关系,对于评价和有效利用土壤及草地植被资源起着重要的作用。以黄河源区的高寒草地生态系统为研究对象,运用MODIS数据构建土壤水源涵养功能模型并探究其时空变化特征,明确草地植被的时空变化规律,以耦合协调度理论为基础探讨二者耦合关系的季节性变化和空间分布特征。结果表明:(1)2000-2021年土壤水源涵养功能指数和综合植被指数在各个季节上均呈增加趋势,22年的季平均值表现为夏季和秋季高于春季和冬季;(2)2000-2021年各个季节土壤水源涵养功能-植被(SWCF ...
张晓宁   +5 more
doaj  

黄前库区流域植被水源涵养功能及植被类型选择的研究

open access: yesShuitu Baochi Xuebao, 2003
通过对黄前库区流域现有植被类型的调查和主要类型的涵养水源保持水土作用分析,从生态效益和经济效益两方面对各种植被类型进行了综合评价。结果表明,在黄前库区植被的建设中,从生态和经济效益两方面全面考虑,远山、陡坡和山上部可以刺槐林等水源涵养林为主;山坡中部和管理不便的立地条件较好的远山可以柿树、板栗、枣树等干果林为主;近山中下部土壤条件较好,樱桃和杏树等经济林具有较大的发展潜力。
李德生 张萍 张水龙 尹建道 鲁法典
doaj   +2 more sources

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