已入深夜,您辛苦了!由于当前在线用户较少,发布求助请尽量完整地填写文献信息,科研通机器人24小时在线,伴您度过漫漫科研夜!祝你早点完成任务,早点休息,好梦!

Lateral flow between bald and vegetation patches induces the degradation of alpine meadow in Qinghai-Tibetan Plateau

地表径流 渗透(HVAC) 环境科学 水文学(农业) 高原(数学) 导水率 土壤科学 植被(病理学) 土壤水分 地质学 生态学 地理 岩土工程 数学分析 气象学 病理 生物 医学 数学
作者
Xiaojin Jiang,Xiai Zhu,Zi‐Qiang Yuan,Yong Li,Wenjie Liu,Sissou Zakari
出处
期刊:Science of The Total Environment [Elsevier BV]
卷期号:751: 142338-142338 被引量:26
标识
DOI:10.1016/j.scitotenv.2020.142338
摘要

Bald patches (BPs) are known to accelerate and simultaneously mitigate the process of desertification. However, the mechanisms of these two synchronous actions are little studied in high desert and cold systems; and the incidence of BPs on alpine meadows degradation in Qinghai-Tibetan Plateau (QTP) of China is still unavailable. This study first aims to investigate the soil properties and the erodibility of the system BPs-VPs at the Beiluhe basin in QTP. Then, we adopted dye tracer and HYDRUS-2/3D methods to interpret the water infiltration patterns from point scale to slope scale. The results show that the mattic epipedon layer on the top soil (0–20 cm) of VPs directly reduced the impact of raindrops on alpine meadow; and the adhesion of root system in VPs prevented the soil particles from stripping and washing away by runoff. The soil particles in BPs were easily eroded by rainfall, lowering the ground level of BPs relative to the ground level of VPs. The two patches therefore alternated to form an erosion interface where marginal meadow was likely detached by raindrops, and washed away through runoff. The saturated hydraulic conductivity (Ks) of surface soil (0–10 cm) was 124% higher in BPs than the VPs. Thereby, BPs caused a high spatial variation of infiltration and runoff in QTP. Moreover, this difference in Ks between the two patches conducted to a lateral flow from BPs to VPs, and to soil layers with different water contents. These findings highlight that the water flow features can potentially disturb the processes of freezing-thawing, frost heaves, and thaw slump; and accelerate the alpine meadow degradation. Therefore, land cover such as crop and vegetation should be applied over the bare soil surface to prevent the degradation of alpine meadow.
最长约 10秒,即可获得该文献文件

科研通智能强力驱动
Strongly Powered by AbleSci AI
更新
PDF的下载单位、IP信息已删除 (2025-6-4)

科研通是完全免费的文献互助平台,具备全网最快的应助速度,最高的求助完成率。 对每一个文献求助,科研通都将尽心尽力,给求助人一个满意的交代。
实时播报
漫步云端发布了新的文献求助10
刚刚
1秒前
奶昔完成签到,获得积分10
3秒前
深情安青应助务实的夏菡采纳,获得10
3秒前
爆米花应助Jemma采纳,获得10
7秒前
充电宝应助奶昔采纳,获得10
8秒前
小马甲应助自觉向秋采纳,获得10
8秒前
漫步云端完成签到,获得积分10
9秒前
爆米花应助123采纳,获得30
9秒前
15秒前
15秒前
WDD关闭了WDD文献求助
16秒前
18秒前
20秒前
陈西发布了新的文献求助10
20秒前
自由飞翔发布了新的文献求助10
21秒前
FashionBoy应助yokliang采纳,获得10
22秒前
自觉向秋发布了新的文献求助10
23秒前
23秒前
哭泣千亦关注了科研通微信公众号
23秒前
25秒前
所所应助keken采纳,获得10
25秒前
26秒前
song发布了新的文献求助10
26秒前
28秒前
军帽发布了新的文献求助10
29秒前
混子鱼发布了新的文献求助10
29秒前
王旭完成签到,获得积分10
29秒前
30秒前
Friday发布了新的文献求助10
32秒前
33秒前
科研通AI5应助哈哈哈采纳,获得10
35秒前
bu才发布了新的文献求助50
36秒前
LQX2141发布了新的文献求助10
37秒前
37秒前
37秒前
哭泣千亦发布了新的文献求助10
38秒前
39秒前
Talha完成签到,获得积分10
39秒前
天天快乐应助momochichu采纳,获得10
40秒前
高分求助中
A new approach to the extrapolation of accelerated life test data 1000
Picture Books with Same-sex Parented Families: Unintentional Censorship 700
ACSM’s Guidelines for Exercise Testing and Prescription, 12th edition 500
Nucleophilic substitution in azasydnone-modified dinitroanisoles 500
不知道标题是什么 500
Indomethacinのヒトにおける経皮吸収 400
Phylogenetic study of the order Polydesmida (Myriapoda: Diplopoda) 370
热门求助领域 (近24小时)
化学 材料科学 医学 生物 工程类 有机化学 生物化学 物理 内科学 纳米技术 计算机科学 化学工程 复合材料 遗传学 基因 物理化学 催化作用 冶金 细胞生物学 免疫学
热门帖子
关注 科研通微信公众号,转发送积分 3976455
求助须知:如何正确求助?哪些是违规求助? 3520548
关于积分的说明 11203728
捐赠科研通 3257156
什么是DOI,文献DOI怎么找? 1798618
邀请新用户注册赠送积分活动 877819
科研通“疑难数据库(出版商)”最低求助积分说明 806523