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Provedor de dados:  5
País:  France
Título:  Large-scale spatio-temporal patterns of Mediterranean cephalopod diversity
Autores:  Keller, Stefanie
Bartolino, Valerio
Hidalgo, Manuel
Bitetto, Isabella
Casciaro, Loredana
Cuccu, Danila
Esteban, Antonio
Garcia, Cristina
Garofalo, Germana
Josephides, Marios
Jadaud, Angelique
Lefkaditou, Evgenia
Maiorano, Porzia
Manfredi, Chiara
Marceta, Bojan
Massut, Enric
Micallef, Reno
Peristeraki, Panagiota
Relini, Giulio
Sartor, Paolo
Spedicato, Maria Teresa
Tserpes, George
Quetglas, Antoni
Data:  2016-01
Ano:  2016
Resumo:  Species diversity is widely recognized as an important trait of ecosystems’ functioning and resilience. Understanding the causes of diversity patterns and their interaction with the environmental conditions is essential in order to effectively assess and preserve existing diversity. While diversity patterns of most recurrent groups such as fish are commonly studied, other important taxa such as cephalopods have received less attention. In this work we present spatio-temporal trends of cephalopod diversity across the entire Mediterranean Sea during the last 19 years, analysing data from the annual bottom trawl survey MEDITS conducted by 5 different Mediterranean countries using standardized gears and sampling protocols. The influence of local and regional environmental variability in different Mediterranean regions is analysed applying generalized additive models, using species richness and the Shannon Wiener index as diversity descriptors. While the western basin showed a high diversity, our analyses do not support a steady eastward decrease of diversity as proposed in some previous studies. Instead, high Shannon diversity was also found in the Adriatic and Aegean Seas, and high species richness in the eastern Ionian Sea. Overall diversity did not show any consistent trend over the last two decades. Except in the Adriatic Sea, diversity showed a hump-shaped trend with depth in all regions, being highest between 200-400 m depth. Our results indicate that high Chlorophyll a concentrations and warmer temperatures seem to enhance species diversity, and the influence of these parameters is stronger for richness than for Shannon diversity.
Tipo:  Text
Idioma:  Inglês

Editor:  Public Library Science
Formato:  application/pdf
Fonte:  Plos One (1932-6203) (Public Library Science), 2016-01 , Vol. 11 , N. 1 , P. e0146469.
Direitos:  2016 Keller et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.


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