Typical vegetation dynamics and hydrological changes of Dongting Lake wetland from 1985 to 2020

IF 2.7 4区环境科学与生态学 Q2 ECOLOGY

Ecohydrology & Hydrobiology Pub Date : 2024-12-01 DOI:10.1016/j.ecohyd.2023.04.008

Yao Liu , Jingtai Li , Dandan Yan , Li Chen , Min Li , Zhaoqing Luan

{"title":"Typical vegetation dynamics and hydrological changes of Dongting Lake wetland from 1985 to 2020","authors":"Yao Liu , Jingtai Li , Dandan Yan , Li Chen , Min Li , Zhaoqing Luan","doi":"10.1016/j.ecohyd.2023.04.008","DOIUrl":null,"url":null,"abstract":"<div><div><span>Dongting Lake wetland provides important ecosystem functions for water regulation and biodiversity protection. However, the construction of the Three Gorges Dam has seriously affected the wetland hydrology and landscape. Therefore, it is of great significance to study the landscape dynamics of Dongting Lake wetland and its response to hydrological changes. Based on GEE cloud platform, this paper will obtain the long-term landscape dynamic changes of Dongting Lake wetland and analyze the influence of changes of multi-period water conditions on wetland landscape. The results show that, 1) From 1985 to 2020, the typical vegetation area of Dongting Lake wetland changed obviously on the whole lake scale. The evolution of wetland landscape pattern mainly occurred in East Dongting Lake, west of South Dongting Lake and north of West Dongting Lake. 2) According to the M-K method, the water level data of Dongting Lake showed a sudden change in 2003. This led to the decline of the annual water level of Dongting Lake and the decline of the water level during the wet season and retreating season. 3) The main hydrological variables affecting the change of the area of </span><em>C. brevicuspis</em>(<em>Carex brevicuspis</em>) and <em>P. australis</em>(<em>Phragmites australis</em>) in Dongting Lake wetland are the mean water level and minimum water level in wet season, and the mean water level, the minimum water level and the maximum water level in retreating season. This study can be used as a theoretical foundations to protect and restore the wetlands of Dongting Lake and manage the Three Gorges project.</div></div>","PeriodicalId":56070,"journal":{"name":"Ecohydrology & Hydrobiology","volume":"24 4","pages":"Pages 910-919"},"PeriodicalIF":2.7000,"publicationDate":"2024-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Ecohydrology & Hydrobiology","FirstCategoryId":"93","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1642359323000496","RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ECOLOGY","Score":null,"Total":0}

引用次数: 0

Abstract

Dongting Lake wetland provides important ecosystem functions for water regulation and biodiversity protection. However, the construction of the Three Gorges Dam has seriously affected the wetland hydrology and landscape. Therefore, it is of great significance to study the landscape dynamics of Dongting Lake wetland and its response to hydrological changes. Based on GEE cloud platform, this paper will obtain the long-term landscape dynamic changes of Dongting Lake wetland and analyze the influence of changes of multi-period water conditions on wetland landscape. The results show that, 1) From 1985 to 2020, the typical vegetation area of Dongting Lake wetland changed obviously on the whole lake scale. The evolution of wetland landscape pattern mainly occurred in East Dongting Lake, west of South Dongting Lake and north of West Dongting Lake. 2) According to the M-K method, the water level data of Dongting Lake showed a sudden change in 2003. This led to the decline of the annual water level of Dongting Lake and the decline of the water level during the wet season and retreating season. 3) The main hydrological variables affecting the change of the area of C. brevicuspis(Carex brevicuspis) and P. australis(Phragmites australis) in Dongting Lake wetland are the mean water level and minimum water level in wet season, and the mean water level, the minimum water level and the maximum water level in retreating season. This study can be used as a theoretical foundations to protect and restore the wetlands of Dongting Lake and manage the Three Gorges project.

查看原文本刊更多论文

1985 - 2020年洞庭湖湿地典型植被动态与水文变化

洞庭湖湿地具有重要的水调节和生物多样性保护功能。然而，三峡大坝的建设严重影响了湿地的水文和景观。因此，研究洞庭湖湿地景观动态及其对水文变化的响应具有重要意义。本文将基于GEE云平台，获取洞庭湖湿地长期景观动态变化，分析多期水条件变化对湿地景观的影响。结果表明：①1985—2020年，洞庭湖湿地典型植被面积在全湖尺度上发生了明显变化；湿地景观格局的演变主要发生在洞庭湖东侧、洞庭湖南侧和洞庭湖西侧。2)根据M-K方法，洞庭湖2003年水位数据呈现突发性变化。这就导致了洞庭湖年水位的下降，以及湿季和退季水位的下降。3)影响洞庭湖湿地短茎草（Carex brevicuspis）和芦苇（Phragmites australis）面积变化的主要水文变量为雨季平均水位和最低水位，退潮期平均水位、最低水位和最高水位。研究结果可为洞庭湖湿地的保护与恢复以及三峡工程的管理提供理论依据。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Ecohydrology & Hydrobiology Agricultural and Biological Sciences-Aquatic Science

CiteScore

5.40

自引率

3.80%

发文量

期刊介绍： Ecohydrology & Hydrobiology is an international journal that aims to advance ecohydrology as the study of the interplay between ecological and hydrological processes from molecular to river basin scales, and to promote its implementation as an integrative management tool to harmonize societal needs with biosphere potential.