Mexico

Shade coffee farms promote genetic diversity of native trees

Background

In the tropical Americas, coffee is typically cultivated under shade canopy cover. Unlike coffee grown in full sun, shade-grown coffee plays host to an increased diversity of vertebrates and invertebrates. However, the contributions of shade-grown coffee patches in tropical landscapes towards preserving genetic flows have not yet been studied.

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Shade effect on coffee production at the northern Tzeltal zone of the state of Chiapas, Mexico

Background

Shade-grown coffee has been a preferred method in the tropics largely due to its benefits for biodiversity. However, impacts on yield are not yet fully understood, nor are the potentials for multiple uses of canopy species.

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Optimising Seedling Management: Pouteria sapota, Diospyros digyna, and Cedrela odorata in a Mexican Rainforest

background

This study compares the height growth of three native tree species (Pouteria sapota, Diospyros digyna, and Cedrela odorata) during the first two years after transplantation from a nursery in three plot types (primary rainforest, secondary forest, and open pasture) in Veracruz, Mexico.

Research Goals & Methods

The effects of canopy closure, leaf nutrients, initial seedling height and seed mass on the final height of the plant after two years were analyzed.

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Tropical Dry Forest Recovery: Processes and Causes of Change

BACKGROUND

This paper aims at unraveling processes and pathways of tropical dry forest (TDF) secondary succession occurring after traditional shifting-cultivation practices. It focuses on the study of community dynamics, the development of forest structure, and changes in floristic composition, to understand what makes a group of species to be present, dominant, and eventually disappear, at a certain space and time. The work begins with a section on the use of tree rings to determine the ages of fallows. 

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Applying Indigenous Knowledge to the Restoration of Degraded Tropical Rain Forest Clearings Dominated by Bracken Fern

background

The indigenous Lacandon Maya people of southern Mexico use a rotational agriculture system known in Spanish as the milpa for production of maize and other crops. This system rotates production to different plots, allowing the forest and soil to recover in the fallow years between production periods. In some cases, the Lacandon people actively manage forest recovery, sowing Balsa trees to prevent plots from being taken over by the invasive Bracken fern.

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Monitoring of Black Mangrove Restoration with Nursery-Reared Seedlings on an Arid Coastal Lagoon

background

This paper describes a reforestation experiment with black mangrove (Avicennia germinans) in an arid mangrove forest of Baja California Sur, Mexico. In arid mangrove systems, natural regeneration and small-scale reforestation are not adequate to restore mangrove forests, as they may be in the humid tropics. Thus, alternative nursery techniques for arid mangroves must be developed.

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Plant Growth-Promoting Bacteria: A Potential Tool for Arid Mangrove Reforestation

background

Microbes (bacteria and fungi) play a crucial role in nutrient recycling in mangrove systems, which are nutrient deficient. Microbes make nutrients, especially nitrogen and phosphorous, available to mangroves, while mangroves may improve soil conditions for microbes (for example, by oxidizing the soil). PGPB may be nitrogen fixers, phosphate solubilizers, mineral uptake enhancers, and phytopathogen controllers.

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Soil Responses to restoration of a tropical pasture in Veracruz, South-Eastern Mexico.

Background

Changes in land use and land cover may affect soil properties and processes. Conversion of forest to pasture is assumed to result in a decrease in soil nutrients. Restoration to healthy grassland or forest may lead to an increase in soil nutrients. This paper reports on a study on soil responses to restoration of a tropical pasture in Veracruz, Mexico.

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Maya Nut Reforestation

Background

Maya Nut is an NGO that seeks to find balance between people, forests, and food. While they do not run a reforestation program directly, they do work closely with communities to reforest degraded lands throughout Latin America. The mission of the program is to conserve the Maya nut tree, Brosimum alicastrum, by planting trees and teaching rural and indigenous women to harvest and process the seed for food and income.

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Conceptual Framework for Mangrove Restoration in the Yucatán Peninsula

Background

In the Yucatán Peninsula, mangroves were lost at a rate of around 1.84% per year between 1976 and 2000. In 2000, the North American Wetlands Conservation Council gave the state government of Yucatán $800,000 towards mangrove restoration projects. Some research shows that the projects funded by this grant did not fully meet restoration goals.

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