Excerpts: Agriculture and forestry activities in the Caribbean are diverse, and include products such as coffee, tropical fruits, ornamentals, beans, root crops, livestock, dairy products, and timber. Caribbean residents depend heavily on these products for subsistence and as valuable cash crop exports. The U.S. Caribbean, Puerto Rico and the U.S. Virgin Islands region relies heavily on imported agricultural and timber products and local production is far below its full potential. The Caribbean has been deemed especially vulnerable to the effects of climate change due to the region’s exposure to extreme weather events, its geographic and economic scale, and its reliance on tourism and imported goods. The U.S. Caribbean region represents a unique social-ecological system within the greater United States. Working lands in this region face some environmental challenges that are generally similar to those within the continental United States, such as increasing temperatures, shifting rainfall patterns, increasing weather variability and extremes, and rising sea levels. But higher levels of exposure, higher sensitivity, and lack of adaptive capacity make Caribbean systems more vulnerable to the effects of these challenges. This report provides an initial assessment of the major cropping systems, livestock, forestry, and related socio-economic factors in Puerto Rico and the U.S. Virgin Islands and their vulnerability to predicted climatic shifts associated with global climate change.