Lessons Learned From Direct Seeding to Restore Degraded Mountains in Cauca, Colombia

IF 1.9 4区环境科学与生态学 Q3 ECOLOGY

Ecological Management & Restoration Pub Date : 2025-01-13 DOI:10.1111/emr.12625

Sergio Esteban Lozano-Baez, Anna Morio, Barbara Bonnet, Paula Díaz Valderrama, Oscar Alirio Castillo Sánchez, Julián Ricardo Tintinago Trujillo, Harvey Marín Paladines, Margarita Flórez, Elcy Gómez, Francisco José Medina, Paula Meli

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引用次数: 0

Abstract

Direct seeding is a technique frequently used to restore degraded lands worldwide. Direct seeding is attractive to restore degraded lands mainly because of its low cost compared to planting seedlings. However, this technique has been poorly studied in tropical mountains. Here, we investigated the outcomes of direct seeding at four degraded sites in the Andean mountains of Cauca, Colombia. We used 45 native tree species, most of them commonly used in restoration projects in the Andean region of Colombia. After 150 days of sowing, we evaluated seedling emergence, survival and establishment costs. Performance of direct seeding was markedly different across sites. Most species had low seedling emergence, with Guayaba (Psidium guajava) and Matachande (Bocconia frutescens) showing the highest emergence. Species with large seeds showed higher emergence compared with medium and small seeds. Seedling density was considerably variable among sites, ranging from 496 to 5550 ind. ha⁻¹. Our results evidence the need for long-term monitoring at mountain restoration sites and that restoring tropical degraded mountains using direct seeding is a challenge that can be complemented with native tree planting. Further research is required to explore the advantages and disadvantages of direct seeding in mountain terrain.

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直播是世界范围内恢复退化土地经常使用的一种技术。直接播种之所以对恢复退化土地有吸引力，主要是因为与种植树苗相比，直接播种成本低。然而，这项技术在热带山区的研究却很少。在这里，我们调查了哥伦比亚考卡安第斯山脉四个退化地块的直播结果。我们使用了 45 种本地树种，其中大部分是哥伦比亚安第斯地区修复项目中常用的树种。播种 150 天后，我们对幼苗的出苗率、存活率和建植成本进行了评估。直接播种在不同地点的表现明显不同。大多数物种的出苗率较低，其中瓜亚巴（Psidium guajava）和马塔昌德（Bocconia frutescens）的出苗率最高。种子大的物种出苗率高于种子中等和小的物种。不同地点的幼苗密度差异很大，从 496 株/公顷到 5550 株/公顷不等。我们的研究结果表明，需要对山地恢复地点进行长期监测，而且利用直接播种恢复热带退化山地是一项挑战，可以辅之以本地植树。需要进一步开展研究，探讨在山区直接播种的优缺点。

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来源期刊

Ecological Management & Restoration Environmental Science-Management, Monitoring, Policy and Law

CiteScore

4.20

自引率

0.00%

发文量

期刊介绍： Ecological Management & Restoration is a peer-reviewed journal with the dual aims of (i) reporting the latest science to assist ecologically appropriate management and restoration actions and (ii) providing a forum for reporting on these actions. Guided by an editorial board made up of researchers and practitioners, EMR seeks features, topical opinion pieces, research reports, short notes and project summaries applicable to Australasian ecosystems to encourage more regionally-appropriate management. Where relevant, contributions should draw on international science and practice and highlight any relevance to the global challenge of integrating biodiversity conservation in a rapidly changing world. Topic areas: Improved management and restoration of plant communities, fauna and habitat; coastal, marine and riparian zones; restoration ethics and philosophy; planning; monitoring and assessment; policy and legislation; landscape pattern and design; integrated ecosystems management; socio-economic issues and solutions; techniques and methodology; threatened species; genetic issues; indigenous land management; weeds and feral animal control; landscape arts and aesthetics; education and communication; community involvement.