土地利用遗产和树种丰富程度影响着世界上最大的难民营重新造林地区的短期恢复能力

IF 3.9 2区环境科学与生态学 Q1 ECOLOGY

Ecological Engineering Pub Date : 2025-03-22 DOI:10.1016/j.ecoleng.2025.107612

Faqrul Islam Chowdhury , Rezaul Hasan Bhuiyan , Josep Maria Espelta , Víctor Resco de Dios , Tasnima Dilshad , Md. Riyadul Haque , Md. Aman Ullah Aman , Francisco Lloret

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引用次数: 0

摘要

最近，被迫迁移成为难民营森林砍伐的驱动因素，而重新造林为恢复这些退化的生态系统提供了一个解决方案。100万难民抵达世界上最大的难民营库图帕朗难民营（孟加拉国东南部），在移民涌入后造成了严重的森林损失，随后开展了恢复工作。然而，这些重新造林工作的有效性及其对植被健康的影响在很大程度上仍未得到探索。本研究通过分析植被指数（EVI）增强动态来评估再造林的恢复和恢复力，并考虑了以前土地利用系统的遗留效应（天然林vs.人工林-遗留地块）、树种丰富度和当地地形作为辅助因素。库图帕隆地区的恢复力值为0.64，表明该地区仍处于恢复阶段。在移徙者涌入之前即为森林的重新造林地块中观察到较高的恢复，而在森林砍伐前的EVI值与人工林遗留地块中较高的恢复力相关。树种丰富度较高的森林遗产样地恢复速度较快，可能是由于多种树种资源共享驱动的互补效应。然而，种植金合欢的单一样地表现出更高的恢复力，可能是由于生长相关性状。此外，未受干扰的表土，特别是在低海拔地区，可以进一步增强恢复力和恢复力。本研究结果建议在不适合外加剂的单一木耳人工林种植，同时考虑到以前土地利用的遗留影响并实施土壤恢复策略。这些措施有可能改善植被健康，改善当地环境，并最终有助于改善营地居民的生活条件。

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Land-use legacies and tree species richness affect short-term resilience in reforested areas of the world's largest refugee camp

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Land-use legacies and tree species richness affect short-term resilience in reforested areas of the world's largest refugee camp

Forced migration has recently emerged as a deforestation driver in refugee camps, while reforestation offers a solution to restore these degraded ecosystems. The arrival of one million refugees to Kutupalong camp (southeastern Bangladesh), the world's largest refugee camp, led to significant forest losses after migrant influx, where restoration efforts were subsequently undertaken. However, the effectiveness of these reforestation efforts, and their consequences on vegetation health, remain largely unexplored. This study evaluated the recovery and resilience of reforestation by analyzing enhanced vegetation index (EVI) dynamics, considering the legacy effects of previous land-use systems (natural forest- vs. plantation-legacy plots), tree species richness, and local topography as co-factors. Reforested areas in Kutupalong showed a resilience value of 0.64, indicating that they are still in the recovery phase. Higher recovery was observed in reforested plots that were forests before migrant influx, while pre-deforestation EVI values were associated with higher resilience in plantation-legacy plots. Forest-legacy plots with higher tree species richness exhibited higher recovery probably due to complementarity benefits, driven by resource sharing among multiple tree species. Yet, monospecific plots with Acacia auriculiformis in plantation-legacy plots exhibited higher resilience, likely due to growth related traits. Additionally, undisturbed topsoil, especially in lower elevations, could further enhance recovery and resilience. Findings of this study recommend monospecific A. auriculiformis plantations where admixtures are not feasible, while considering the legacy effects of previous land-uses and implementing soil restoration strategies. These measures potentially improve vegetation health, enhance the local environment, and ultimately contribute to better living conditions to camp inhabitants.

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来源期刊

Ecological Engineering 环境科学-工程：环境

CiteScore

8.00

自引率

5.30%

发文量

293

审稿时长

57 days

期刊介绍： Ecological engineering has been defined as the design of ecosystems for the mutual benefit of humans and nature. The journal is meant for ecologists who, because of their research interests or occupation, are involved in designing, monitoring, or restoring ecosystems, and can serve as a bridge between ecologists and engineers. Specific topics covered in the journal include: habitat reconstruction; ecotechnology; synthetic ecology; bioengineering; restoration ecology; ecology conservation; ecosystem rehabilitation; stream and river restoration; reclamation ecology; non-renewable resource conservation. Descriptions of specific applications of ecological engineering are acceptable only when situated within context of adding novelty to current research and emphasizing ecosystem restoration. We do not accept purely descriptive reports on ecosystem structures (such as vegetation surveys), purely physical assessment of materials that can be used for ecological restoration, small-model studies carried out in the laboratory or greenhouse with artificial (waste)water or crop studies, or case studies on conventional wastewater treatment and eutrophication that do not offer an ecosystem restoration approach within the paper.