| Signatura:||Biblioteca OET: C9-38. |
| Tít.Analit.:|| Seasonally Dry Tropical Forests.|
| Autor:|| Ceballos-González, Gerardo; Bullock, Stephen H, (ed.); Mooney, Harold A, (ed.); Medina, E, (ed.). |
| Dirección:|| Universidad Nacional Autónoma de México, Centro de Ecología, Apdo. Postal 70-275, 04310 México, D.F, MX. |
| Título: ||
Vertebrate diversity, ecology, and conservation in neotropical dry forests. Diversidad de vertebrados, ecología y conservación en bosques secos neotropicales. (ISBN 0-521-4351-45.)|
| P.imprenta: || p. 195-220. Año 1995. Editorial Cambridge, Cambridge University Press, GB. |
| Descriptores:|| ANIMALS; CHORDATES; VERTEBRATES; MAMMALS; CARNIVORES; MARSUPIALS; INSECTIVORANS; CHIROPTERA; LAGOMORPHS; XENARTHRANS; RODENTS; ARTIODACTYLS. |
TROPICAL DRY FORESTS; DECIDUOUS SEASONAL FORESTS; ECOLOGY; CONSERVATION; BIODIVERSITY; TROPICAL RAIN FORESTS; INDIGENOUS ORGANISMS; DIDELPHIDAE; SORICIDAE; PHYLLOSTOMIDAE; BATS; VESPERTILIONIDAE; LEPORIDAE; DASYPODIDAE; SCIURIDAE; GEOMYIDAE; HETEROMYIDAE; MURIDAE; CAVIIDAE; CTENOMYIDAE; MUSTELIDAE; TAYASSUIDAE; MIGRANT BIRDS; ANIMAL RESPONSES; CLIMATIC SEASONALITY; HISTORICAL BIOGEOGRAPHY; ENDANGERED SPECIES; RESOURCE CONSERVATION.
COSTA RICA; CENTRAL AMERICA.
AREA DE CONSERVACION CORDILLERA VOLCANICA CENTRAL; LA SELVA BIOLOGICAL STATION; OTS; GUANACASTE.
| Resumen: ||Neotropical dry forests have lower species diversity than tropical moist or wet forests, mainly because of the absence of many specialized species of carnivores, frugivores and semiaquatic mammals. However, dry forests ares special respositories of vertebrate diversity because of their endemic species. Dry forests in western Mexico and the Chaco support the higest number of endemic terrestrial vertebrate genera and species, suggesting scenarios of geological and ecological isolation. At any given latitude, the number of vertebrates in dry forest is apparently correlated with its degree of isolation from other tropical forests. Corridors of semideciduous (gallery) forests or riparian vegetation help to increase diversity in dry forest, because many species widespread in dry forest during the wet season retreat to those habitats to find refuge during the dry season. Among the most important factors that have shaped the diversity and composition of vertebrate faunas in the neotropics are faunal interchange (related to plate tectonics) and Pleistocene climatic changes. As a result of these factors, many dry forest animals became extinct, particularly large herbivores and carnivores. The extensive climatic changes of the Pleistocene expanded, fragmented and sometimes eliminated dry forests. Those changes resulted in large-scale speciation events in dry forest floras, the extinction of many xeric-adapted species of vertebrates, and the isolation and speciation of many small-sized vertebrates in the dry forests of Mexico and the Chaco. Unfortunately, dry forests are being destroyed throughout the neotropics, apparently at a higher rate than in wet forests. Indeed, Central American, Venezuelan, Brazilian and Andean dry forests have almost completely disappeared, and the Mexican and Chaco forests have been reduced. The conservation of large tracts of dry forest is essential for the conservation of many endemic species, as well as for all western North American migratory land birds and populations of widespread tropical species. A major effort should be made to protect dry forests in Latin America, with their unique genetic diversity and ecological processes. This is essential for maintaining the hemisphere's biological diversity and the sustainaible use of the species and iological systems on which human well-being depends|