Tropical Forest Restoration in the Eastern Himalaya: Evaluating Early Survival and Growth of Native Tree Species

IF 2.3 4区 环境科学与生态学 Q2 ECOLOGY
Noopur Borawake, A. Datta, Rohit Naniwadekar
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Abstract

Asian tropical forests have among the highest rates of forest loss in the world. Ecological restoration is a vital step for biodiversity maintenance and climate change mitigation. For restoration practice, evaluation of species performance at early stages is crucial to avoid failure of the efforts and for screening species suitable to a region. Though the long-term performance of restoration plantings has been well-documented, few studies have evaluated the performance during the establishment of the planted saplings, especially in South and Southeast Asia. Restoration efforts in Northeast India, a region experiencing high forest loss, is limited by the lack of species-specific data on survival and growth. We compared inter-specific variation in seasonal survival and growth rates (diameter and height) for multiple native rainforest species from this region. We planted 3022 saplings of 50 species at a degraded open forest site. After 18 months, sapling survival varied between 9.1–94.3% for 32 species, and only six species showed “excellent” survival after 18 months. Eight out of 17 species that were tested for seasonal variation in survival showed significant differences in survival between seasons. While the diameter growth rate varied for species between seasons, the height growth rate was different between both species and season, but the interaction term between species and season was not significant. Certain animal-dispersed, medium to large-seeded primary forest species performed well and are vital for future restoration efforts in this region.
喜马拉雅东部热带森林恢复:评估本地树种的早期生存和生长
亚洲热带森林是世界上森林损失率最高的地区之一。生态恢复是维护生物多样性和减缓气候变化的重要步骤。在恢复实践中,早期评估物种绩效对于避免努力失败和筛选适合区域的物种至关重要。虽然恢复种植的长期效果已经得到了充分的记录,但很少有研究对树苗建立期间的效果进行评估,特别是在南亚和东南亚。印度东北部是一个森林损失严重的地区,由于缺乏特定物种的生存和生长数据,恢复工作受到限制。我们比较了该地区多种原生雨林物种的季节存活率和生长率(直径和高度)的种间差异。我们在一个退化的开阔林地种植了50种3022棵树苗。18个月后,32种树苗的存活率在9.1 ~ 94.3%之间,只有6种树苗在18个月后的存活率为“优秀”。在17个物种中,有8个在季节之间的生存差异显著。不同树种间的直径生长率不同,而不同树种间和不同季节间的高度生长率不同,但种与季节间的交互作用项不显著。某些动物分散的中、大种子原生林物种表现良好,对该地区未来的恢复工作至关重要。
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来源期刊
Ecological Restoration
Ecological Restoration Environmental Science-Nature and Landscape Conservation
CiteScore
1.70
自引率
12.50%
发文量
24
期刊介绍: Ecological Restoration is a forum for people advancing the science and practice of restoration ecology. It features the technical and biological aspects of restoring landscapes, as well as collaborations between restorationists and the design professions, land-use policy, the role of education, and more. This quarterly publication includes peer-reviewed science articles, perspectives and notes, book reviews, abstracts of restoration ecology progress published elsewhere, and announcements of scientific and professional meetings.
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