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Restauración natural de la relación especie-área para un lagarto después de un huracán
T W Schoener1, D A Spiller, J B Losos
1Section of Evolution and Ecology, University of California, Davis, CA 95616, USA. twschoener@ucdavis.edu
Science (New York, N.Y.)
|November 17, 2001
Resumen
El huracán Floyd devastó las poblaciones de lagartos en las islas de las Bahamas. El área de la isla, crucial para la recuperación del lagarto Anolis sagrei, resurgió como un predictor clave después de la tormenta, restaurando la distribución de las especies.
Área de la Ciencia:
- Ecología Ecología Ecología.
- Zoología Zoología Zoología.
- Biogeografía insular Biogeografía insular
Sus antecedentes:
- El huracán Floyd impactó 66 islas de las Bahamas en septiembre de 1999.
- El estudio se centra en la especie de lagarto común, Anolis sagrei.
Objetivo del estudio:
- Para documentar el impacto del huracán Floyd en las poblaciones de Anolis sagrei.
- Comprender los factores que influyen en la recuperación de la población de lagarto después de un gran huracán.
- Para analizar los cambios en los patrones de distribución de especies por área.
Principales métodos:
- Encuestas de campo realizadas antes y después del huracán Floyd en 66 islas.
- Evaluación de la aparición de Anolis sagrei en relación con el área de la isla y la altitud.
- Monitoreo de la recuperación de la población durante 19 meses después del huracán.
Principales resultados:
- El área de la isla fue inicialmente un mejor predictor de la ocurrencia de Anolis sagrei que la altitud.
- Inmediatamente después del huracán, la altitud se convirtió en un mejor predictor, con lagartos de baja altura pereciendo.
- En 19 meses, el 88% de las islas anteriormente ocupadas fueron re-colonizadas, con el área de la isla mejorando la recuperación.
Conclusiones:
- Los desastres naturales pueden alterar drásticamente la distribución de las especies.
- El área de la isla juega un papel crítico en la recuperación de las poblaciones de lagarto de la isla después del desastre.
- Las relaciones especie-área se pueden restaurar rápidamente a través de la colonización natural y los procesos reproductivos.
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