Modelling spatio-temporal patterns of fish community size structure across the northern Mediterranean Sea: an analysis combining MEDITS survey data with environmental and anthropogenic drivers

Isabella Bitetto; Giovanni Romagnoni; Angeliki Adamidou; Gregoire Certain; Manfredi Di Lorenzo; Marilena Donnaloia; Giuseppe Lembo; Porzia Maiorano; Giacomo Milisenda; Claudia Musumeci; Francesc Ordines; Paola Pesci; Panagiota Peristeraki; Ana Pesic; Maria Teresa Spedicato

doi:10.3989/scimar.05015.06A

Autores/as

Isabella Bitetto COISPA Tecnologia & Ricerca https://orcid.org/0000-0002-8497-1642
Giovanni Romagnoni COISPA Tecnologia & Ricerca - Centre for Ecological and Evolutionary Synthesis (CEES), Dept. of Biosciences, University of Oslo https://orcid.org/0000-0002-2208-3017
Angeliki Adamidou FRI https://orcid.org/0000-0002-9958-3407
Gregoire Certain UMR MARBEC IFREMER-LHM https://orcid.org/0000-0002-5242-5268
Manfredi Di Lorenzo Institute for Biological Resources and Marine Biotechnologies, National Research Council (IRBIM-CNR) https://orcid.org/0000-0003-3786-5772
Marilena Donnaloia COISPA Tecnologia & Ricerca https://orcid.org/0000-0001-6707-0503
Giuseppe Lembo COISPA Tecnologia & Ricerca https://orcid.org/0000-0002-9899-6189
Porzia Maiorano Dipartimento di Biologia, Bari University of Aldo Moro https://orcid.org/0000-0001-5737-3025
Giacomo Milisenda SZN (Stazione zoologica Anton Dohrn), Dipartimento di ecologia marina integrata https://orcid.org/0000-0003-1334-9749
Claudia Musumeci CIBM https://orcid.org/0000-0001-9778-6254
Francesc Ordines Instituto Español de Oceanografía, Centre Oceanogràfic de les Balears https://orcid.org/0000-0002-2456-2214
Paola Pesci Department of Life and Environmental Sciences, University of Cagliari https://orcid.org/0000-0002-9066-8076
Panagiota Peristeraki Hellenic Center of Marine Research https://orcid.org/0000-0002-8608-078X
Ana Pesic University of Montenegro - Institute of Marine Biology https://orcid.org/0000-0002-8669-6744
Maria Teresa Spedicato COISPA Tecnologia & Ricerca https://orcid.org/0000-0001-9939-9426

DOI:

https://doi.org/10.3989/scimar.05015.06A

Palabras clave:

Comunidad de peces demersales, indicadores de estructura de tallas, subárea geográfica, Directiva marco de estrategia marina, análisis dinámico de factores, análisis de redundancia

Resumen

Generalmente, el estado de los sistemas marinos sujetos a impactos naturales o antropogénicos puede ser resumido mediante un conjunto de indicadores ecológicos, cuidadosamente seleccionados para evitar la redundancia. Los indicadores basados en la talla reflejan el estado de la estructura de la comunidad de peces, cumpliendo el requisito de la Directiva Marco de la Estrategia Marina (MSFD) para el Descriptor 3 (estado de las especies de peces comerciales). Si bien MSFD recomienda el desarrollo de indicadores regionales, en el Mar Mediterráneo no se ha hecho hasta ahora una comparación entre los distintos indicadores disponibles basados en la talla. Mediante el análisis de componentes principales y el análisis de factores dinámicos, identificamos el subconjunto más eficaz de indicadores basados en la talla, estén o no basados en la talla máxima. Las tendencias de los indicadores y las series temporales del esfuerzo de pesca y las variables ambientales también son comparadas para resaltar la capacidad individual y combinada de los indicadores para detectar los cambios del sistema a través de las subáreas geográficas. Dos indicadores, Longitud Típica (TyL) y Longitud Máxima Media (MML), constituyen el conjunto más pequeño de indicadores no redundantes, captando juntos el 87.45% de variabilidad. Solo si se combinan, estos indicadores pueden discernir entre los cambios en la composición de la comunidad de peces y las modificaciones de la estructura de tallas. Nuestro estudio respalda la inclusión de TyL entre los indicadores regionales del descriptor 3 de MSFD para el mar Mediterráneo. Finalmente, mostramos diferencias entre el Mediterráneo occidental y el Mediterráneo centraloriental que sugieren diferencias subregionales en cuanto a factores impactantes y las respuestas de la comunidad.

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