Evaluating decadal space-temporal mangrove dynamics using geographic object-based image analysis (GEOBIA) on the Doce River delta-ES, southeastern Brazilian coast

IF 2.9 Q2 GEOGRAPHY, PHYSICAL Quaternary Science Advances Pub Date : 2023-12-01 DOI:10.1016/j.qsa.2023.100149
Débora Cristina de Lima Miranda , Marlon Carlos França , Luke Ortiz-Whittingham , Laurent Polidori
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Abstract

Mangroves are ecosystems present in a large part of the Brazilian coastal zone that are home to a wide diversity of organisms, providing direct and indirect resources, as well as nursery and foraging habitats. Using images in 5-year intervals (2010, 2015, and 2020), the present study carried out a decadal mapping of the remaining mangroves of the Doce River delta along the tidal flats of the Mariricu River, in the coastal region of the city of São Mateus-ES. In this context, object-oriented classification methodology (GEOBIA) was used, which allowed the generation of high-resolution data. This methodology achieved excellent results, as evidenced by the global accuracy numbers and Kappa index, which gave an average of 96.78% and 93.5% respectively; and by low values of disagreement, with an average of 3.22%. The change detection analysis showed alterations in the landscape over time, with 9% of the mangrove areas becoming extinct, 12% of the areas expanding, and 79% of the areas remaining preserved. Therefore, our mapping data are consistent with the data published by the State Institute for the Environment and Water Resources of the State of Espírito Santo (IEMA), as well as with scientific works that recorded areas of reduction and expansion for mangroves, but mostly with large preserved areas. With that, our results demonstrate the highly effective application of geotechnologies for coastal environmental analyses with low cost and high speed.

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利用基于地理对象的图像分析(GEOBIA)评估巴西东南海岸多塞河三角洲-ES 红树林的十年时空动态变化
红树林是巴西沿海地区大部分地区存在的生态系统,是各种生物的家园,提供直接和间接资源,以及苗圃和觅食栖息地。本研究利用5年间隔(2010年、2015年和2020年)的图像,对 o Mateus-ES市沿海地区Mariricu河潮汐滩涂沿线的多塞河三角洲剩余红树林进行了年代际制图。在这种情况下,使用了面向对象的分类方法(GEOBIA),它允许生成高分辨率数据。该方法取得了良好的结果,全球精度数字和Kappa指数分别为96.78%和93.5%;持不同意见的人较少,平均为3.22%。变化检测分析显示,随着时间的推移,景观发生了变化,9%的红树林地区灭绝,12%的红树林地区扩大,79%的红树林地区保留下来。因此,我们的制图数据与Espírito Santo州环境与水资源研究所(IEMA)公布的数据一致,也与记录红树林面积减少和扩大的科学工作一致,但大多数都是大片保护区。因此,我们的研究结果证明了地质技术在沿海环境分析中的高效应用,成本低,速度快。
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来源期刊
Quaternary Science Advances
Quaternary Science Advances Earth and Planetary Sciences-Earth-Surface Processes
CiteScore
4.00
自引率
13.30%
发文量
16
审稿时长
61 days
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