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Design and Use of an Apparatus for Quantifying Bivalve Suspension Feeding at Sea
Published on: September 5, 2018
Reducción de la competencia y comportamiento de alimentación alterado entre los caracoles marinos después de una
Gregory P Dietl1, Gregory S Herbert, Geerat J Vermeij
1Center for Marine Science, University of North Carolina, Wilmington, NC 28409, USA.
Science (New York, N.Y.)
|December 25, 2004
Resumen
Los eventos de extinción masiva rediseñaron la dinámica competitiva entre las especies. Después de la extinción, los caracoles depredadores exhibieron una competencia menos intensa por los recursos, alterando sus estrategias de ataque de presas.
Área de la Ciencia:
- Paleontología Paleontología.
- Biología Marina Biología Marina.
- Ecología evolutiva ecología evolutiva.
Sus antecedentes:
- Las extinciones masivas pueden alterar significativamente las interacciones de las especies y las trayectorias evolutivas.
- Comprender la dinámica ecológica posterior a la extinción es crucial para los estudios evolutivos.
Objetivo del estudio:
- Investigar cambios en las interacciones competitivas entre especies marinas antes y después de una extinción masiva del Plioceno-Pleistoceno.
- Analizar cómo el comportamiento depredador de los caracoles muricidas refleja la competencia por los recursos.
Principales métodos:
- Análisis de huellas de depredación fosilizadas (patrones de perforación) en conchas bivalvas de las épocas Plioceno y Pleistoceno/Recientes.
- Estudios experimentales con caracoles muricidas existentes para correlacionar el comportamiento de perforación con la intensidad competitiva.
Principales resultados:
- Los caracoles muricidas exhibieron estrategias de depredación distintas antes (perforación de bordes y paredes) y después (perforación de paredes solamente) de la extinción del Pliopleistoceno.
- La evidencia experimental sugiere que el comportamiento de perforación de borde es inducido por una intensa competencia de recursos.
Conclusiones:
- La extinción masiva del Plioceno-Pleistoceno en el Atlántico occidental llevó a una reducción de la competencia interespecífica entre los caracoles muricidas.
- Los cambios en el comportamiento depredador reflejan paisajes competitivos alterados después del evento de extinción.
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