How Does the Blue C Stock Vary in Restored and Degraded Wetlands Across Land Cover Mosaics? Evidences from Medinipur Coastal Plain, India  

恢复/退化湿地中蓝碳储存的变化——来自印度梅丁尼普尔海岸平原的证据

作　　者：Mansa DEY Mrinmoyee NASKAR Sohini NEOGY Debajit DATTA Mansa DEY;Mrinmoyee NASKAR;Sohini NEOGY;Debajit DATTA(加尔各答大学地理系景观生态实验室,印度加尔各答700032;巴鲁伊普尔学院地理系,印度巴鲁伊普尔743610;班瓦里拉尔·巴洛提亚学院地理系,印度阿萨斯纳索尔713303)

机构地区：[1]Landscape Ecology Laboratory,Department of Geography,Jadavpur University,Kolkata 700032,India [2]Department of Geography,Baruipur College,Baruipur 743610,India [3]Department of Geography,Banwarilal Bhalotia College,Asansol 713303,India

出　　处：《Journal of Resources and Ecology》2024年第4期898-908,共11页资源与生态学报（英文版）

基　　金：The Early Career Research Award(ECR/2017/003380);The Project of Science and Engineering Research Board,Department of Science and Technology,Government of India(DST-SERB).

摘　　要：Coastal wetlands are of paramount importance as major reservoirs of blue carbon(C),playing a crucial role in providing nature-based solutions to mitigate climatic changes.This research aimed to analyse the dynamics of total blue C(TBC)and its components;viz.soil organic C(SOC),below ground C,and above ground C;as well how they are influenced by land use/land cover(LULC)categories and wetland situations.Subsequently,study were identified as one restored wetland and another degraded wetland in the Medinipur Coastal Plain,India.The LULC categories were analyzed using Pleiades 1A and 1B satellite imagery,corresponding to the restored and degraded wetland,respectively.The quantification of SOC was based on point-specific sample data collected from both wetlands(nr=250;nd=84).Above ground biomass(AGB)was appraised employing allometric relationships involving field-measured dendrometric variables.Below ground biomass values were calculated using indirect allometric equations that take into account the AGB values.Integrating all the components,TBC stock of the restored and degraded wetlands were estimated at 246710.91 Mg and 7865.49 Mg,respectively.In the restored wetland,dense mangrove and open mangrove exhibited higher concentrations of blue C components,while other LULC categories demonstrated moderate to low densities.In the degraded wetland,the open mangrove category rechigh densities of C pools,whereas herbaceous vegetation,bare earth and sand,and waterbody exhibited lower concentrations.The results portrayed significant disparities(P<0.05)in blue C pools among different LULC categories in both wetlands.Furthermore,it was evident that wetland type and LULC category had notable(P<0.001)impacts on TBC dynamics,both individually and in combination.Overall,this research may aid in effective management of coastal wetlands as blue C sinks,emphasizing their significance as essential elements of climate mitigation strategies.沿岸湿地作为重要的蓝碳(C)主要储存库具有至关重要的意义,对于提供基于自然的解决方案以应对气候变化政策起着至关重要的作用。本研究旨在评估总蓝C(TBC)及其组成部分的动态变化:即土壤有机碳(SOC)、地下生物量(BGB)和地上生物量(AGB)如何受到土地利用/土地覆盖(LULC)类别和湿地类型的影响。以印度梅丁尼普尔海岸平原的一个恢复湿地和一个退化湿地为研究区,利用Pleiades 1A和1B卫星影像对恢复湿地和退化湿地进行了土地覆盖类别分析,土壤有机碳的量化基于从两个湿地收集的特定点样本数据(nr=250;nd=84)。使用涉及现场测定的树木测量变量的通用方程式来估算AGB;BGB值通过考虑AGB值的间接通用方程来计算。综合考虑所有组成部分,恢复湿地和退化湿地的TBC储存量估计分别为246710.91 Mg和7865.49 Mg。在恢复湿地中,茂密红树林和开阔红树林表现出更高的蓝碳组分浓度,而其他LULC类别则具有中等到低密度的碳储存;在退化湿地中,开阔红树林类别记录了碳库的高密度,而草本植被、裸露土壤和沙地以及水体具有较低浓度的碳库。结果突出显示了在两个湿地的不同LULC类别之间蓝碳库存在显著差异(P<0.05)。此外,湿地类型和LULC类别对TBC的变化会产生显著影响(P<0.001)。总体而言,这项研究有助于提高作为蓝碳汇的沿岸湿地管理的有效性,强调了它们作为气候变化缓解策略的重要性。

关 键 词：blue C pools coastal wetland dendrometric variable landscape transformation mangrove plantation wetland restoration 

分 类 号：X171.1[环境科学与工程—环境科学]