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Forest Proximity, Avian Diversity And Insect Herbivory In Shade Grown Coffee, December 2006, Frannie Peterson
Forest Proximity, Avian Diversity And Insect Herbivory In Shade Grown Coffee, December 2006, Frannie Peterson
Tropical Ecology and Conservation [Monteverde Institute]
Conversion of forest to agricultural plots, plantations, and pastureland is one of the top two reasons for the unprecedented rate of tropical forest destruction. Coffee, in terms of area, is the most important crop in Costa Rica and continues to threaten remaining forest (Lean 1990). This study examined how proximity of coffee plantations to forest stands affects avian diversity, and the role of avian insectivores on coffee herbivory. Avian diversity was studied at two coffee plantations, one near and one far from the forest. Avian diversity was significantly higher in the near-forest coffee plantation than in the far forest. However, …
Avian Feeding Guild Diversity In Sun-Grown And Shade-Grown Coffee Farms In San Luis Valley, Monteverde, Costa Rica, 2006, Anna Richey, Toria Waldron
Avian Feeding Guild Diversity In Sun-Grown And Shade-Grown Coffee Farms In San Luis Valley, Monteverde, Costa Rica, 2006, Anna Richey, Toria Waldron
Tropical Ecology and Conservation [Monteverde Institute]
Three coffee farms were studied to determine avian feeding guild diversity differences between sun-grown and shade-grown plots in San Luis Valley, Monteverde, Costa Rica. Sun-grown and shade-grown plots were observed on three coffee farms, species were identified by sight, and separated into feeding guilds. Using the Shannon-Weiner Diversity Index, we found a significantly greater overall avian diversity in sun-grown plots (Modified t-test, t= -4.00, df = 267.36). We also found no significant difference in feeding guild diversity between sun-grown and shade-grown plots, but found a significant difference within insectivorous and omnivorous feeding guilds supporting greater diversity in the sun-grown plots …