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Deficiencias generalizadas de diversidad de tiburones y rayas de arrecife de coral
Colin A Simpfendorfer1,2, Michael R Heithaus3, Michelle R Heupel2,4
1College of Science and Engineering, James Cook University, Townsville, QLD, Australia.
Science (New York, N.Y.)
|June 15, 2023
Resumen
La sobrepesca está causando la extinción de tiburones en los arrecifes de coral a nivel mundial, lo que lleva al dominio de las rayas y la interrupción del ecosistema. Se necesitan medidas urgentes para proteger las poblaciones de tiburones y restaurar la salud de los arrecifes.
Área de la Ciencia:
- Biología marina
- Ciencias de la conservación
- Ecología
Sus antecedentes:
- Los arrecifes de coral en todo el mundo enfrentan una disminución de las poblaciones de elasmobranquios (tiburones y rayas).
- La sobrepesca es el principal impulsor de estas disminuciones, lo que afecta a la biodiversidad de los arrecifes.
Objetivo del estudio:
- Evaluar el estado global de las especies de tiburones de arrecife residentes.
- Identificar los factores que influyen en la estructura de ensamblaje de las elasmobranquias en los arrecifes de coral.
Principales métodos:
- Estudio global de los arrecifes de coral analizando los ensamblajes de elasmobranquias.
- Análisis a nivel de especie de cinco poblaciones comunes de tiburones de arrecife.
Principales resultados:
- Disminución global del 60-73% para cinco especies comunes de tiburones de arrecife.
- Especies individuales de tiburones ausentes en el 34-47% de los arrecifes estudiados.
- La dominación de rayos aumenta en los arrecifes agotados por tiburones; la presencia de tiburones está vinculada a una fuerte gobernanza y áreas protegidas.
Conclusiones:
- La disminución de tiburones provocada por la sobrepesca amenaza la diversidad y la función ecológica de las elasmobranquias de arrecife.
- La gestión eficaz de los tiburones y una gobernanza sólida son cruciales para mantener ecosistemas saludables de arrecifes.
- La pérdida de tiburones de arrecife tendrá impactos negativos en cascada en los servicios del ecosistema que afectan a las comunidades humanas.
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