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Highlight IDTitleStrategic Program Area(s)YearStation
Photo of Trimmed and intact plots in El Yunque National Forest. Forest Service
ID: 196
A Canopy Trimming Experiment in Puerto Rico: the response of litter invertebrate communities to canopy loss and debris deposition in a tropical forest subject to hurricanes

Insects and other invertebrates in leaf litter are important components in decomposition, nutrient cycling, and food webs. As part of larger stu ...

Principal Investigator : Grizelle Gonzalez

Water, Air, and Soil
Inventory and Monitoring
2010IITF
Photo of Cover of the special issue. The Caribbean Naturalist, Bienvenida and Gerald Bauer.
ID: 1148
A Caribbean Foresters Collaborative Network for Understanding Regional Forest Dynamics

The role of Caribbean forestry research in permanent plots has been identified as both a previously untapped regional source for capacity buildi ...

Principal Investigator : Tamara Heartsill Scalley

Inventory and Monitoring
Resource Management and Use
2016IITF
Photo of Students measuring vegetation structure in urban socio-ecosystem. Forest Service
ID: 324
A socioecological network for a tropical city

Traditional urban research involves tree inventories, census activities, water quality sampling, or socioeconomic studies, all conducted by sepa ...

Principal Investigator : Ariel Lugo

Water, Air, and Soil
Invasive Species
Resource Management and Use
Wildlife and Fish
Inventory and Monitoring
2011IITF
Photo of Tropical forest clearing and rates of forest regrowth can be monitored with multispectral satellite imagery for forest carbon accounting for programs such as the United Nations REDD+ program.  U.S. Geological Survey, the Brazilian Institute for Space Research, and NASA.
ID: 781
A Synthesis of How Multispectral Satellite Imagery Can Support Inventories of Greenhouse Gas Emissions from Tropical Forest Clearing and Regrowth

Human clearing, logging, and burning of tropical forests accounts for at least 19 percent of annual human-caused emissions of carbon dioxide to ...

Principal Investigator : Eileen H. Helmer

Inventory and Monitoring2015IITF
Photo of Avian survey in agricultural mosaic, northern Nicaragua. Gerald P. Bauer, USDA Forest Service
ID: 595
Agroscapes Combined with Preserved Forest Remnants Promote Biodiversity at Local and Landscape Levels

Agroecological practices and resultant agroscapes, coupled with the preservation of forest remnants, have a positive impact on local biodiversit ...

Principal Investigator : Wayne J. Arendt, PhD

Wildlife and Fish2014IITF
Photo of Block and plot structure in El Verde research area.  Inferred area covered by each block is 40,000 m2 and the complete study area covers around 106 m2.  Forest Service
ID: 16
Assessing Litterfall Trap Bias

Are traps preferentially representing certain kinds of leaf litter

Principal Investigator : Grizelle Gonzalez

Resource Management and Use
Water, Air, and Soil
Inventory and Monitoring
2012IITF
Photo of Local produce at the farmers market in Santurce, Puerto Rico. Victor Cuadrado – ThinkaMap
ID: 801
Assessing Vulnerabilities to Climate Change in Tropical Agriculture and Forestry

New Vulnerability Assessment from the USDA Caribbean Climate Sub Hub.

Principal Investigator : William A. Gould

Resource Management and Use2015IITF
Photo of Nicaraguan reporter and IITF cooperator, Adelayde Rivas Sotelo, filming the biodiversity project. Forest Service
ID: 17
Avian Diversity in the Agroscapes of Nicaragua's Northern Highlands

Creating biological corridors to sustain biodiversity, while increasing revenue for local farmers

Principal Investigator : Wayne J. Arendt, PhD

Wildlife and Fish
Inventory and Monitoring
2012IITF
Photo of Data from a tabonuco forest (pictured) in the Luquillo Experimental Forest, one of three long-term time series of data, contributed to the BIOFRAG database. USDA Forest Service
ID: 761
BIOFRAG: A New Database for Analyzing Biodiversity Responses to Forest Fragmentation

A collaboration among more than 50 scientists from international institutions produced a database that contributes to understanding biodiveristy ...

Principal Investigator : Tamara Heartsill Scalley

Inventory and Monitoring
Resource Management and Use
2015IITF
Photo of Assessment of a stream reach that combines open channelization with built-up, impermeable (gray) riparian areas and canopy forming vegetation (green) riparian with permeable surfaces of the Rio Piedras watershed. Luis Weber-Grullón, Arizona State University.
ID: 1154
Challenges to Riparian Function in a Tropical, Urban Stream Network

Limited connectivity of riparian areas, pluvial drainages, and highly modified stream channels affect hydrological function of green spaces in u ...

Principal Investigator : Tamara Heartsill Scalley

Resource Management and Use
Water, Air, and Soil
2016IITF
Photo of View of the Bisley Experimental Watersheds, Luquillo Experimental Forest, Puerto Rico with Cecropia schreberiana (yagrumo) in the valleys and Dacryodes excelsa (tabonuco) in the ridges. Forest Service
ID: 195
Changes in Structure, Composition, and Nutrients During 15 years of Hurricane-Induced Succession in a Subtropical Wet Forest in Puerto Rico

Quantifying the impacts and recovery of forest resources to hurricanes and multiple disturbances is essential to managing forests in hurricane-p ...

Principal Investigator : Tamara Heartsill Scalley

Resource Management and Use
Inventory and Monitoring
2010IITF
Photo of Map of the predicted species richness in Puerto Rico. U.S. Department of Agriculture Forest Service.
ID: 1184
Characterization of the Network of Protected Areas in Puerto Rico

Scientists Analyze the biodiversity, landscape diversity and forest cover in terrestrial protected areas in Puerto Rico to anser the question: W ...

Principal Investigator : William A. Gould

Wildlife and Fish2016IITF
Photo of Arctic average temperatures have risen at almost twice the rate of the rest of the world over the past few decades. Herbaceous dicots, sedges and grasses, and shrubs have been increasing while the cover of both Sphagnum and other mosses have been decreasing over the last two decades. Forest Service
ID: 184
Climate and vegetation change in Alaskan tundra.

Studies of tundra vegetation changes in recent decades have predicted an increase in the relative abundance of shrubs in response to climate war ...

Principal Investigator : William A. Gould

Inventory and Monitoring
Resource Management and Use
2010IITF
Photo of Ten-year moving averages of annual simulated flow components as percent of simulated historical mean (1953-2012) using mid-summer drought, range of general circulation models, and multimodel general circulation model ensembles for the northern U.S. region. U.S. Department of Agriculture Forest Service.
ID: 1104
Climate Change and Water Resources in a Tropical Island System

Forest Service scientists study propagation of uncertainty from statistically downscaled climate models to hydrologic models.

Principal Investigator : William A. Gould

Resource Management and Use
Water, Air, and Soil
2016IITF
Photo of Cooling degree-days (CDD) form the multimodel average of all 12 GCMs under the (a) A2, (b) A1B, and (c) B1 scenarios at 28 stations and their averages. U.S. Department of Agriculture Forest Service.
ID: 1099
Climate Change Implications for Tropical Islands

Interpolating and Interpreting Statistically Downscaled General Circulation Model Projections for Management and Planning

Principal Investigator : William A. Gould

Resource Management and Use
Water, Air, and Soil
2016IITF
Photo of Mangrove reforestation in Puerto Rico. USDA Forest Service
ID: 771
Conserving Mangroves in the Context of the Anthropocene

Mangroves of the Anthropocene will be on the move as a result of sea level rise and atmospheric warming as well as human activity and therefore ...

Principal Investigator : Ariel Lugo

Resource Management and Use2015IITF
Photo of Macrobrachium shrimp species are important to processing leaf detritus in Caribbean streams, but dams keep them from accessing headwaters. Forest Service
ID: 181
Dams slow decomposition of leaf detritus by eliminating shrimp.

Forest Service sponsored research with the University of Georgia found that the absence of shrimp causes drastic changes to stream ecosystems.

Principal Investigator : International Institute of Tropical Forestry

Water, Air, and Soil
Wildlife and Fish
2010IITF
Photo of Book cover
ID: 458
Ecological Gradient Analyses in Tropical Ecosystems

Forest Service scientists recently published a book that contains a comprehensive analysis of ecological gradients in the Luquillo Mountains of ...

Principal Investigator : Grizelle Gonzalez

Inventory and Monitoring
Water, Air, and Soil
Resource Management and Use
2013IITF
Photo of Andrena perplexa. This genus of bees tends to be solitary, nest in the ground, and was found in 6 Experimental Forest sites in the western half of the US. Graham Snodgrass for Sam Droege of USGS
ID: 323
Experimental Forest Network Hosts Nationwide Bee Monitoring Project

There is a widespread perception that populations of pollinating insects in North America are in decline.

Principal Investigator : International Institute of Tropical Forestry

Wildlife and Fish2011IITF
Photo of Shifting agriculture and forest fragmentation in Nicaragua demonstrate some of the complex challenges addressed by the international forest governance regime. Forest Service
ID: 313
Finding Synergistic Approaches for Complex Forest Issues through Global Forest Governance

Despite significant efforts to develop governmental and nongovernmental institutions to address the world's forest problems, there is a sense th ...

Principal Investigator : Kathleen McGinley

Resource Management and Use2011IITF
Photo of Reviewing Compliance of Harvest Plans in the Consorcio Forestal Amazonico, Ucayali, Peru. Forest Service
ID: 18
Forest Regulations are Rigorous throughout much of the Americas, but Implementation Remains a Challenge in Latin America

On paper, Latin America is often stricter on forestry than many States in the United States, but lack of enforcement and compliance continue to ...

Principal Investigator : Kathleen McGinley

Resource Management and Use2012IITF
Photo of Regional groupings of tropical montane cloud forest and associated lower and upper altitudinal limits of the cloud belt (modified after Scatena 2010). U.S. Department of Agriculture Forest Service.
ID: 1158
Geographic, Environmental, and Biotic Sources of Variation in the Nutrient Relations of Tropical Montane Forests

Incorporating other geographic, environmental and biotic variables in tropical montane forests biogeochemistry, might give scientists a more acc ...

Principal Investigator : Grizelle Gonzalez

Inventory and Monitoring
Resource Management and Use
Water, Air, and Soil
2016IITF
Photo of Municipal planners and university students during an i-Tree training session in the Colonial City of Santo Domingo. Jorge Paniagua, U.S. Department of Agriculture Forest Service.
ID: 1173
i-Tree Serves as a Green Infrastructure Assessment Tool to Municipal Planners and Researchers in the Dominican Republic

The iTree tool was implemented for the first time in the Colonial City of Santo Domingo, Dominican Republic, to assess the value of ecosystem-ba ...

Principal Investigator : Tischa A. Munoz-Erickson

Resource Management and Use
Inventory and Monitoring
2016IITF
Photo of The arctic field ecology youth-elder-science camp observing microscopic soil invertebrates. Forest Service
ID: 325
Integrating Research, Education, and Traditional Knowledge in Ecology

Integrating research and education is a fundamental goal of research institutions and agencies but specific approaches not widely published in e ...

Principal Investigator : William A. Gould

Resource Management and Use
Water, Air, and Soil
Inventory and Monitoring
2011IITF
Photo of Watersheds, land cover, and municipalities within the study area of the El Yunque National Forest.  USDA Forest Service
ID: 770
Land-cover Composition, Water Resources and Land Management in the Watersheds of the Luquillo Mountains, Northeastern Puerto Rico

An important element for wise use of water-related ecosystem services is understanding land-cover composition and its relation to water resource ...

Principal Investigator : Tamara Heartsill Scalley

Water, Air, and Soil2015IITF
Photo of Peaks of El Yunque National Forest, Puerto Rico. Gerald Bauer, U.S. Department of Agriculture Forest Service.
ID: 1145
Making Management More Adaptive Through Research in El Yunque National Forest

Research is an integral part of decision making on the El Yunque National Forest as forest management adopts an adaptive approach to resource pl ...

Principal Investigator : Kathleen McGinley

Resource Management and Use2016IITF
Photo of Tropical Montane Cloud forest from the Luquillo Experimental Forest, Puerto Rico. van Vicens, Forest Service
ID: 310
Managing Tropical Montane Cloud Forests

Over the course of a decade, USFS researchers have collaborated with international researchers to complete research needed to better manage and ...

Principal Investigator : International Institute of Tropical Forestry

Water, Air, and Soil
Resource Management and Use
2011IITF
Photo of Forest disturbance type, age and vertical structure were mapped for the first time with widely available satellite imagery, substituting an image time series for vertical forest canopy space. Forest Service
ID: 194
Mapping avian habitat characteristics using cloud-cleared satellite image mosaics

Forest age, vertical structure, disturbance For studies of wintering habitat for the endangered Kirtland's Warbler, scientists from the Forest S ...

Principal Investigator : Eileen H. Helmer

Inventory and Monitoring
Wildlife and Fish
2010IITF
Photo of LiDAR-based distribution maps (Moscow Mountain, northern Idaho) for different snag diameter classes (top) and understory shrubs (bottom).  Twenty meter pixel presence/absence products are to the left, and 1- ha density maps are to the right. The presence/absence maps include, between parentheses, the proportional cover of the two classes (i.e. present vs. absent). Forest Service
ID: 182
Mapping snags and understory shrubs with LiDAR to assess wildlife habitat suitability.

Forest Service scientists evaluated the use of LiDAR data for mapping the presence/absence of understory shrub species and different snag diamet ...

Principal Investigator : William A. Gould

Wildlife and Fish
Inventory and Monitoring
2010IITF
Photo of IITF scientists and collaborators mapped 40 forest types plus urban and agricultural areas for Trinidad and Tobago in the first country-wide map of tropical forest tree communities and land cover.  Eileen H. Helmer, Forest Service
ID: 21
New Study Leads the Way to Detailed Mapping of Tropical Rain Forest Types

Tropical tree communities mapped for Trinidad and Tobago with satellite imagery

Principal Investigator : Eileen H. Helmer

Wildlife and Fish
Inventory and Monitoring
2012IITF
Photo of Soil sample. Thomas J. Brandein, Forest Service
ID: 593
Nitrogen and Phosphorus Content in Forest Floor Litter is Elevated in a Tropical Landscape Recovering from Deforestation

Fallen leaf chemistry provides a window into the various and often complex factors affecting the availability of nutrients to trees. Both nitrog ...

Principal Investigator : Eileen H. Helmer

Inventory and Monitoring2014IITF
Photo of African tulip trees, on kartz topography, showing more abundant bryophyte cover at the bases of their tree trunks. Frank  Su?rez, Biology Department, Mayagez Campus, University of Puerto Rico
ID: 311
Novel secondary forests provide valuable habitat for non-vascular plants

The value of secondary forests dominated by introduced species has been the subject of much debate. Forest Service sponsored research in Puerto ...

Principal Investigator : International Institute of Tropical Forestry

Invasive Species2011IITF
Photo of Image of the mapping tool as viewed online through the San Juan ULTRA website http://sanjuanultra.org/.  Tischa Munoz, USDA Forest Service
ID: 459
Online Mapping Tool Helps Identify Green Areas for Sustainability Planning in San Juan

The tool also allows multiple stakeholders in the city to deliberate and model multiple scenarios for green connectivity and their utility in ad ...

Principal Investigator : Tischa A. Munoz-Erickson

Inventory and Monitoring
Resource Management and Use
Water, Air, and Soil
2013IITF
Photo of Large trees occupy a drainage inside Eco-park. Yiscel Y�ng?ez, Panama
ID: 192
Panama Eco-park: a Protected Urban Forest

A consortium of Panamanian natural resource management agencies have been developing Eco-Park to increase eco-tourism. Forest Service scientists ...

Principal Investigator : Peter Weaver

Outdoor Recreation2010IITF
Photo of IITF Wildlife Researcher demonstrating banding techniques for wren photographic key. Forest Service
ID: 29
Photographic Key Determines Age and Gender in Two Thryothorus Wrens From Nicaragua's Pacific Slope

A visual and metric aid to determining age and gender in tropical wrens

Principal Investigator : Wayne J. Arendt, PhD

Wildlife and Fish
Inventory and Monitoring
2012IITF
Photo of Figure 1. (A) The study sites were located in the Luquillo Experimental Forest in northeastern Puerto Rico; (B) Logs of two species and two stages of decomposition were selected (20 logs total) and paired soil and core samples were collected and; (C) PRS-probes (Plant Root Simulator) (ion exchange membranes) were collected from underneath and 50 cm away from the logs. U.S. Department of Agriculture Forest Service.
ID: 1152
Physical, Chemical, and Biological Properties of Soil Under Decaying Wood in a Tropical Wet Forest in Puerto Rico

Decaying wood is related to nutrient cycling through its role as either a sink or source of nutrients; however, at micro scales, what is the eff ...

Principal Investigator : Grizelle Gonzalez

Inventory and Monitoring
Resource Management and Use
Water, Air, and Soil
2016IITF
Photo of A flush of new growth on an ultra-fast growing mahogany sapling. Forest Service
ID: 180
Population Dynamics of Big-leaf Mahogany in the Brazilian Amazon

The Mahogany Project seeks to understand what makes big-leaf mahogany 'tick' in southeast Amazonia by monitoring vital rates for all stages of i ...

Principal Investigator : International Institute of Tropical Forestry

Resource Management and Use2010IITF
Photo of A simulated forest canopy opening in the Luquillo Experimental Forest to mimic hurricane disturbance and investigate changes in microclimate, biota, and ecosystem processes. Aaron B. Shiels, National Wildlife Research Center; USDA Animal and Plant Health Inspection Service
ID: 800
Post-hurricane Canopy Openings Influence Ecosystem Processes in a Tropical Rainforest

Forest Service researchers collaborated with external scientists to examine the effects of hurricane disturbance on tropical forest ecosystems. ...

Principal Investigator : Grizelle Gonzalez

Resource Management and Use
Inventory and Monitoring
Invasive Species
Water, Air, and Soil
Wildland Fire and Fuels
2015IITF
Photo of The elevation gradient in northeastern Puerto Rico, from coastal lowlands to the tropical mountain peaks of Luquillo Experimental Forest. USDA Forest Service
ID: 766
Precipitation and Temperature Trends Along an Elevation Gradient in Northeastern Puerto Rico Examined

Forest Service researchers studied climatic trends along an elevation gradient in northeastern Puerto Rico. Study results showed that differing ...

Principal Investigator : Ashley Van Beusekom

Water, Air, and Soil
Inventory and Monitoring
2015IITF
Photo of Extent of light pollution in the island of Puerto Rico, Vieques and Culebra, 1992-93 to 2000. Global data source accessible from NOAA NGDC Earth Observation Group (EOG) Defense Meteorological Satellite Program. Forest Service
ID: 193
Preserving the nighttime environment for future generations in Puerto Rico

Currently, Forest Service scientists are helping to monitor the state and extent of artificial light pollution in Puerto Rico. Scientists are cu ...

Principal Investigator : Olga Ramos

Outdoor Recreation
Resource Management and Use
2010IITF
Photo of A new map product in the recently inaugurated FS Research & Development Research Map Series (RMAP) summarizes the relative amounts of federal, local, and nongovernmental ownership and management, and degree to which biodiversity conservation is a priority. Forest Service
ID: 183
Protected areas of Puerto Rico: Terrestrial and aquatic biodiversity protection.

Forest Service scientists have mapped public and private lands designated for special protection in Puerto Rico. We identified 115 terrestrial a ...

Principal Investigator : William A. Gould

Wildlife and Fish
Resource Management and Use
2010IITF
Photo of Natural producers of Kirtlands Warbler winter habitat were likely hurricanes and fire; now human disturbance such as bulldozing, goat grazing, mowing or brush-hogging create winter habitat for the warbler.  The range of successional stages following disturbance are shown in the lower photos. Forest Service
ID: 210
Protecting the Endangered Kirtland's Warbler and Developing Conservation Capacity in The Bahamas

The Kirtland's Warbler, one of North America's most endangered migrant songbirds, has been the focus of intensive federal and state conservation ...

Principal Investigator : International Institute of Tropical Forestry

Wildlife and Fish2010IITF
Photo of Forest succession at research site plot in the Chiclana stream, part of the Rio Piedras watershed. Top photo 2006, below 2010. A pluvial structure is marked at the right of each photo for reference. Harold Manrique-Hernandez, San Juan Bay Estuary Program.
ID: 1153
Riparian Vegetation Restoration in Light of Succession; Management Implications for Restoration in Tropical Secondary Forests

There is a wide variety of approaches on how to determine when a river restoration project can be considered ecologically successful. The limite ...

Principal Investigator : Tamara Heartsill Scalley

Invasive Species
Inventory and Monitoring
Water, Air, and Soil
2016IITF
Photo of Fire weather zones for Puerto Rico and the U.S. Virgin Islands. William Gould, USDA Forest Service
ID: 456
Scientist Develops Fire Danger Rating System and Fire Weather Zones for Puerto Rico and U.S. Virgin Islands

New Fire Weather Zones and a Fire Danger Rating System Developed for Puerto Rico and the U.S. Virgin Islands.

Principal Investigator : William A. Gould

Wildland Fire and Fuels2013IITF
Photo of Forest floor litter and duff measurements for eight forest types along elevation gradient in northeastern Puerto Rico. Asterisks indicate significant difference between litter and duff biomass within forest type. Grizelle Gonz�lez, USDA Forest Service
ID: 457
Scientists Characterize Woody Debris to Assess Fuel Loads in Northeastern Puerto Rico

Forest Service scientists characterized the amounts of woody debris (coarse woody debris, fine woody debris, duff, and litter) for eight differe ...

Principal Investigator : Grizelle Gonzalez

Inventory and Monitoring
Water, Air, and Soil
Wildland Fire and Fuels
2013IITF
Photo of Occurrence records for Centropomus parallelus in streams and estuaries of Puerto Rico and the US Virgin Islands. Benjamin Crain, USDA Forest Service
ID: 455
Scientists Complete New Database for Modeling and Mapping Species Distributions

Forest Service scientists completed two large project reports: The U.S. Virgin Islands Terrestrial Gap Analysis Project delivered to the USGS Na ...

Principal Investigator : William A. Gould

Wildlife and Fish2013IITF
Photo of Red bulletwood (Manilkara bidentata) leaf in a stream flow contributing to seasonally varying tropical stream exports that are resources for aquatic fauna. Forest Service
ID: 30
Seasonality and Forest Succession in Tropical Watersheds Affects Stream Export

Continuous export of organic matter from mountain streams depends on forested headwaters contributing leaf litter of varied quantity and quality ...

Principal Investigator : Tamara Heartsill Scalley

Resource Management and Use
Water, Air, and Soil
2012IITF
Photo of There have been overall population declines in resident and migratory birds in the Gu�nica Biosphere Reserve in Puerto Rico. USDA Forest Service
ID: 454
Steep Decline of a Winter Resident Bird Community in Puerto Rico Needs Swift Action

The migratory bird community inhabiting one of the Caribbean's most unadulterated and extensive remaining dry forests, the Gu�nica Biosphere R ...

Principal Investigator : Wayne J. Arendt, PhD

Wildlife and Fish2013IITF
Photo of Screen shot from the Big Leaf Mahogany Growth and Yield Model found at  <a href=http://www.swietking.org target=_new>www.swietking.org</a>
ID: 312
Sustainable Management of Big-leaf Mahogany in the Brazilian Amazon

Big-leaf mahogany is by far the most valuable timber species in seasonally dry forests across the southern rim of the Amazon Basin, but much of ...

Principal Investigator : International Institute of Tropical Forestry

Resource Management and Use2011IITF
Photo of A view of a multiple tree mortality event in the Tapajos National Forest near Santarem, in the Brazilian Amazon. Fernando Espirito-Santo, NASA Jet Propulsion Laboratory
ID: 594
The Carbon Balance of Tropical Forests is a Matter of Life and Death

Living trees take carbon dioxide out of the air as they grow, and dead trees put carbon back into the air as they decompose. This study, seven y ...

Principal Investigator : International Institute of Tropical Forestry

Water, Air, and Soil2014IITF
Photo of CLCC logo
ID: 1106
The Caribbean Landscape Conservation Cooperative

A New Framework for Effective Conservation of Natural and Cultural Resources in the Caribbean.

Principal Investigator : William A. Gould

Resource Management and Use
Water, Air, and Soil
2016IITF
Photo of Río Saliente river in Jayuya, Puerto Rico.  Kasey R. Jacobs, USDA Forest Service
ID: 592
The effects of changing land cover on stream flow simulation in Puerto Rico

Rainfall, terrain, and use of the landscape affect stream flow and water resources availability.

Principal Investigator : William A. Gould

Resource Management and Use2014IITF
Photo of Mameyes river flood event. USDA Forest Service
ID: 780
The Effects of Changing Land Cover on Streamflow Simulation in Puerto Rico

Streamflow models were developed for Puerto Rico, Vieques, and Culebra simulating historic conditions from 1953 to 2012. When land cover was inc ...

Principal Investigator : William A. Gould

Resource Management and Use
Water, Air, and Soil
2015IITF
Photo of Millipedes used in the microcosms were all from the Order Stemmiulida, Family Stemmiulidae. Forest Service
ID: 19
The Role of Millipedes in Tropical Ecosystems

The direct and indirect effects on litter of varying lignin content

Principal Investigator : Grizelle Gonzalez

Water, Air, and Soil2012IITF
Photo of Visualization of the conceptual model used as a heuristic tool for the San Juan ULTRA.  The left side of the box representing the watershed's ecological components and the right side of the diagram represents social components. These are integrated through green, blue and gray infrastructure. USDA Forest Service
ID: 590
Understanding Vulnerability and Sustainability of Urban Social-ecological Systems in the Tropics

Scientists of the San Juan Urban Long-Term Research Area (ULTRA) publish an interdisciplinary synthesis of social-ecological system research in ...

Principal Investigator : Tischa A. Munoz-Erickson

Resource Management and Use2014IITF
Photo of Leucaena leucocephala, one of the dominate non-native trees found in the novel Prosopis-Leucaena woodlands in Puerto Rico. Ron Lance
ID: 460
When Insectivorous Birds Want to Forage in Puerto Rico, What Trees do They Prefer?

High foliage palatability of some alien tree species may weaken the effect of the so-called enemy release that occurs when introduction of a pla ...

Principal Investigator : Joseph M. Wunderle, Jr.

Wildlife and Fish2013IITF
Photo of Bottom two photos: Left photo shows student intern Scott Johnson and project field directorJennifer White at a goat farm site (11 years after clearing) where the Kirtland's Warblers were abundant. Right photo shows a female Kirtland's Warbler.
ID: 591
Winter Ecology and Conservation Implications for the Endangered Migrant Kirtland's Warbler in the Bahamas

Winter droughts reduce the endangered Kirtland's Warbler's food supply and body condition in the Bahamas, which affect its survival and breeding ...

Principal Investigator : Joseph M. Wunderle, Jr.

Wildlife and Fish2014IITF