Assisted Natural Regeneration

The potential of secondary forests to restore biodiversity of the lost forests in semi-deciduous West Africa

BACKGROUND:

The human population in West Africa has increased considerably over the past four decades, leading to a high demand for food. This has led to the conversion of vast forest lands to agricultural lands in the region. Degraded forest landscapes have the capacity to regain fertility and naturally regenerate, resulting in the widespread spread of secondary forests in West Africa. Despite the significant presence of secondary forests in the region, there is rare knowledge about forest successional stages and general dynamics.

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Active restoration accelerates the carbon recovery of human-modified tropical forests

Background:

More than half of all tropical forests are degraded by human impacts, leaving them threatened with conversion to agricultural plantations and risking substantial biodiversity and carbon losses. Restoration could accelerate recovery of aboveground carbon density (ACD), but adoption of restoration is constrained by cost and uncertainties over effectiveness. Therefore, is necessary to  understand the economic feasibility of restoration treatments in the context of global carbon pricing and the Paris climate agreement.

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Direct seeded and colonizing species guarantee successful early restoration of South Amazon forests

Background

South Amazon forests have been highly deforested, including the legally protected riparian forests. Direct seeding is a low cost method, easy-to-implement at large scale. The authors emphasize the imperative to reduce the costs and enhance the outcomes of restoration efforts, which have become mainstream solutions in countering biodiversity loss and climate change around the world.

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Tropical Rainforest Restoration Plantations Are Slow to Restore the Soil Biological and Organic Carbon Characteristics of Old Growth Rainforest

Background:

With widespread deforestation and land conversion posing significant threats to biodiversity and carbon sequestration, there is an urgent need to comprehend the intricate relationship between land use change, soil microbial communities, and soil organic carbon dynamics in tropical rainforest ecosystems.

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Survival and Early Growth of 51 Tropical Tree Species in Areas Degraded by Artisanal Gold Mining in the Peruvian Amazon

Background:

Artisanal and small-scale gold mining has dramatically changed the landscape of tropical ecosystems, completely removing the soil and vegetation and polluting it with mercury disposals. In order to recover these degraded spaces, reforestation projects need to enhance their knowledge of restoration species growth and survival rates under different site conditions, as well as their fertilization needs.

Goals:

The authors of this study aim to (1) test 51 species with potential for ecological restoration and/or forest rehabilitation; (2) assess the potential for biochar amendments for use in reforestation efforts; and (3) explore species performance regarding their contrasting wood density traits.

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Biochar Effects on Two Tropical Tree Species and Its Potential as a Tool for Reforestation

Background:

Although biochar is starting to be recognized as a potential soil fertilizer, most of the current studies are focused on the growth response of herbaceous crops and not on the impacts of biochar on tree development.

Goals:

The authors measure the survival rate, growth, and biomass accumulation of the seedlings of two tropical tree species Terminalia amazonia (“terminalia”) and Guazuma crinita (“bolaina”) under abandoned gold mine conditions: nutrient-poor and sandy soil. The seedlings were tested under six different treatments (three doses of biochar, with and without fertilizer) for six months.

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Higher Fire Frequency Impaired Woody Species Regeneration in a South-Eastern Amazonian Forest

Background:

The more and more common forest fires in the Amazon rainforest, caused after fire escape from pasture or deforested lands, cause unpredictable changes to the forest structure. Therefore, it is essential to assess the resilience of these ecosystems after being impacted by fire events and the likelihood of maintaining forest tree species and not being replaced by savanna species.

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Fire and tree species diversity in tropical peat swamp forests

Background

Indonesia houses a large quantity of peat swamps, an ecosystem type that contains diverse plant species, and provides a habitat for endangered animals. Peat swamps are degraded due to logging and agriculture expansion, specifically with the use of fire. Peat swamps are highly susceptible to fires due to peat flammability. Peat swamps also house a large quantity of carbon, so restoration is a high priority.

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Disrupted montane forest recovery hinders biodiversity conservation in the tropical Andes

Background

In the U.N. Decade on Restoration, recovering degraded forests is a high priority. Andean montane forests are a biodiversity hotspot, storing large quantities of carbon, and providing many sources for human livelihood. Many parts of the Andean forests are recovering after agriculture abandonment, but it is not yet known how the dynamics of these recovery processes progress over time. Knowledge of forest regeneration trajectory is crucial for further restoration planning.

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Assisted restoration interventions drive functional recovery of tropical wet forest tree communities

Background

Integrating science and practice is one of the main goals of the U.N. Decade on Ecosystem Restoration. A variety of factors can influence the application of restoration treatments across tropical ecosystems. Deciding where to apply a restoration strategy on the spectrum between natural regeneration an active restoration planting can be challenging and there is not enough current knowledge that compares these methods.

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