Evaluating the performance of Polylepis incana seeds: reassessing their potential for restoration and conservation of high Andean forests

IF 2.8 3区 环境科学与生态学 Q2 ECOLOGY
Harold Rusbelth Quispe‐Melgar, L. David Huayta‐Hinojosa, Yashira Stefani Llacua‐Tineo, Fressia N. Ames‐Martínez, Katherine L. Lagones Poma, Ginette Ticse‐Otarola, Mario Tomazello‐Filho, Daniel Renison
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Abstract

The use of high‐quality seeds is essential for reforestation and ecosystem restoration; however, few Andean species have been assessed to determine factors influencing seed quality. Most Andean native tree species used for restoration are propagated from naturally regenerated seedlings or cuttings. We evaluated the seed quality (germination, viability, vigor, and physical characteristics) of a central Peruvian population of the keystone high Andean tree species Polylepis incana (quinual) in relation to the mother tree and microsite characteristics. Our analysis, using 12,912 seeds categorized by weight, included germination tests in incubator, tetrazolium tests, and vigor test (germination in nursery conditions). Results showed a mean germination rate of 30.9 ± 22.4%, with a significant proportion of damaged (38.7%), empty (19.1%), and non‐viable (12.7%) seeds. Heavier seeds exhibited the highest germination, while dasometric variables of the mother tree were not related to seed performance. However, solar incidence and slope negatively impacted germination. We conclude that seed quality may be higher than previously estimated, supporting the need to re‐evaluate and promote the use of seeds for propagating P. incana. Furthermore, since the characteristics of mother trees seem not to be relevant for this species and only solar incidence and terrain slope seem to negatively affect seed quality, we consider it important to change the paradigm from identifying individual seed trees to identifying seed forests. Conservation of natural forests as primary seed sources should be the foundation of future reforestation and restoration efforts in the high Andes.
评估 Polylepis incana 种子的性能:重新评估其恢复和保护安第斯高山森林的潜力
使用高质量的种子对重新造林和生态系统恢复至关重要;然而,很少有安第斯物种经过评估以确定影响种子质量的因素。大多数用于恢复的安第斯原生树种都是通过自然再生的幼苗或插条繁殖的。我们评估了秘鲁中部一个安第斯高原关键树种 Polylepis incana(五针松)种群的种子质量(发芽率、存活率、活力和物理特征)与母树和微地特征的关系。我们的分析使用了按重量分类的 12,912 粒种子,包括培养箱发芽试验、四唑试验和活力试验(苗圃条件下的发芽)。结果表明,种子的平均发芽率为 30.9 ± 22.4%,其中受损种子(38.7%)、空种子(19.1%)和无活力种子(12.7%)所占比例较大。重量较大的种子萌发率最高,而母树的垂直测量变量与种子表现无关。然而,太阳入射率和坡度对发芽率有负面影响。我们得出的结论是,种子质量可能比以前估计的要高,这支持了重新评估和推广使用种子繁殖白千层的必要性。此外,由于母树的特征似乎与该物种无关,只有太阳入射率和地形坡度似乎会对种子质量产生负面影响,因此我们认为有必要改变模式,从识别单个种子树转向识别种子林。保护作为主要种子来源的天然林应成为安第斯高山地区未来植树造林和恢复工作的基础。
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来源期刊
Restoration Ecology
Restoration Ecology 环境科学-生态学
CiteScore
6.50
自引率
15.60%
发文量
226
审稿时长
12-24 weeks
期刊介绍: Restoration Ecology fosters the exchange of ideas among the many disciplines involved with ecological restoration. Addressing global concerns and communicating them to the international research community and restoration practitioners, the journal is at the forefront of a vital new direction in science, ecology, and policy. Original papers describe experimental, observational, and theoretical studies on terrestrial, marine, and freshwater systems, and are considered without taxonomic bias. Contributions span the natural sciences, including ecological and biological aspects, as well as the restoration of soil, air and water when set in an ecological context; and the social sciences, including cultural, philosophical, political, educational, economic and historical aspects. Edited by a distinguished panel, the journal continues to be a major conduit for researchers to publish their findings in the fight to not only halt ecological damage, but also to ultimately reverse it.
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