Puerto Rico - United States

Soil macrofauna and litter nutrients in three tropical tree plantations on a disturbed site in Puerto Rico

Background

Tree plantations are increasingly common in tropical landscapes due to their multiple uses. Plantations vary in structure and composition, and these variations may alter soil fauna communities. Recent studies have demonstrated the important role of soil fauna in the regulation of plant litter decomposition in the tropics. However, little is known about how plantation species affect soil fauna populations, which may in turn affect the biogeochemistry of the plantation system.

Open access copy available

Effects of forest clearing and succession on the carbon and nitrogen content of soils in Puerto Rico and US Virgin Islands

Background

Conversion of tropical forest lands to agriculture or pasture affects soil organic matter, moisture, and nutrients. This study examines the effects on soil carbon, nitrogen, and moisture at depths up to 100 cm of conversion from forest to agriculture and pasture.

Available with subscription or purchase

The Role of Nurse Trees in Mitigating Fire Effects on Tropical Dry Forest Restoration: A Case Study

Background

The authors of this study initially studied differential growth rates in a reforestation project of native tree species with nurse trees(Leucaena leucocephala) and without nurse trees when the area had two fire events. However, authors took advantage of the unplanned experiment to study the effects of fire in reforestation.

Available with subscription or purchase

Evaluación comparativa de dos mitigaciones realizadas en la ciénaga Las Cucharillas, Puerto Rico (Wetland mitigation in Puerto Rico)

Open access copy available

Bioecologia de Arboles Nativos y Exoticos de Puerto Rico and Las Indias Occidentales (Silvics of Native and Exotic Trees of Puerto Rico and the Caribbean Islands)

 

Español

Sobre

Esta base de datos fue publicada en Junio del 2000 por el USDA y el US Forest Service como recurso para la identificación y propagación de árboles nativos y exóticos de Puerto Rico y el Caribe.

Open access copy available

The Apparent Paradox of Reestablishing Species Richness on Degraded Lands with Tree Monocultures

background

This article discusses the use of tropical tree plantations as an approach to rehabilitation of degraded landscapes. For extremely degraded sites, the use of plantations may provide the proper shade, microclimate and protection for other species to colonize the understory. Research on the use of plantations in restoration is discussed, with examples primarily from Puerto Rico.

Open access copy available

Forest Regeneration in a Chronosequence of Tropical Abandoned Pastures: Implications for Restoration Ecology

Background

During the mid‐1900s, most of the island of Puerto Rico was deforested, but a shift in the economy from agriculture to small industry beginning in the 1950s resulted in the abandonment of agricultural lands and recovery of secondary forest. This research examines the natural regeneration patterns on these abandoned agricultural lands in four different regions of Puerto Rico.

Available with subscription or purchase

Carbon Sequestration and Plant Community Dynamics Following Reforestation of Tropical Pasture

Background

Conversion of abandoned cattle pasture to secondary forest in the tropics is a potential means to increase carbon sequestration as well as to enhance local biodiversity. This study uses data from a long-term tropical reforestation project – Luquillo Experimental Forest in Puerto Rico – to estimate rates of above- and belowground carbon sequestration.

Open access copy available

Influence of Overstory Composition on Understory Colonization by Native Species in Plantations on a Degraded Tropical Site

background

This study evaluates forest understory regeneration in a 4.5 year-old plantation in Puerto Rico. The plantations, established in 1989, were planted on abandoned pasture in mixtures or monocultures of three exotic species: Casuarina equisetifolia, Eucalyptus robusta, and Leucaena leucocephala.

Available with subscription or purchase

Soil organic matter dynamics during 80 years of reforestation of tropical pastures

Background

Land disturbance affects soil physical and chemical properties. Some properties may be recovered over long periods of reforestation. Mosaic-pattern landscapes with shifting usages over time, common in the mountainous tropics, can reveal dynamic soil properties. This study reports on changes in soil carbon over 80 years of secondary forest growth on abandoned pasture over a chronosequence in Puerto Rico.

Open access copy available
Subscribe to Puerto Rico - United States