Sardines at a junction: seascape genomics reveals ecological and oceanographic drivers of variation in the NW Mediterranean Sea
Type | Article | ||||||||||||
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Date | 2023-04 | ||||||||||||
Language | English | ||||||||||||
Author(s) | Antoniou Aglaia1, Manousaki Tereza1, Ramírez Francisco2, Cariani Alessia3, Cannas Rita4, Kasapidis Panagiotis1, Magoulas Antonios1, Albo‐puigserver Marta2, 5, Lloret‐lloret Elena2, Bellido Jose Maria6, Pennino Maria Grazia7, Follesa Maria Cristina4, Esteban Antonio6, Saraux Claire8, Sbrana Mario9, Spedicato Maria Teresa10, Coll Marta2, Tsigenopoulos Costas S.1 | ||||||||||||
Affiliation(s) | 1 : Institute of Marine Biology Biotechnology and Aquaculture, Hellenic Centre for Marine Research, Gournes Pediados, Irakleio, P.O. Box 2214, 71003 Crete ,Greece 2 : Institute of Marine Science (ICM‐CSIC) Passeig Marítim de la Barceloneta, n° 37‐49, 08003 Barcelona, Spain 3 : Dept. Biological, Geological & Environmental Sciences (BiGeA) Alma Mater Studiorum – Università di Bologna Via Sant’Alberto 163, 48123 Ravenna, Italy ‐ Consorzio Nazionale Interuniversitario per le Scienze del Mare (CoNISMa), Rome ,Italy 4 : Department of Life and Environmental Sciences University of Cagliari via T. Fiorelli 1‐09126 Cagliari, Italy‐ Consorzio Nazionale Interuniversitario per le Scienze del Mare (CoNISMa), Rome ,Italy 5 : Centro Oceanográfico de Baleares, Instituto Español de Oceanografía (COB‐CNIEO/CSIC). Moll de Ponent s/n, 07015 Palma ,Spain 6 : Centro Oceanográfico de Murcia, Instituto Español de Oceanografía, (COMU‐CNIEO/CSIC), C/ Varadero 1, 30740 (Murcia) San Pedro del Pinatar ,Spain 7 : Centro Oceanográfico de Vigo, Instituto Español de Oceanografía (COVI‐CNIEO/CSIC). Subida a Radio Faro 50‐52, 36390 Vigo Pontevedra, Spain 8 : MARBEC, Univ Montpellier, CNRS, Ifremer, IRD Sète ,France 9 : Consorzio per il Centro Interuniversitario di Biologia Marina ed Ecologia Applicata G. Bacci. Viale Nazario Sauro 4 ‐ 57128 Livorno ,Italy 10 : COISPA Tecnologia & Ricerca. Via dei trulli 18. 70126 Bari, Italy |
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Source | Molecular Ecology (0962-1083) (Wiley), 2023-04 , Vol. 32 , N. 7 , P. 1608-1628 | ||||||||||||
DOI | 10.1111/mec.16840 | ||||||||||||
WOS© Times Cited | 6 | ||||||||||||
Keyword(s) | climate change, ddRAD, outliers, population genomics, SNPs | ||||||||||||
Abstract | By evaluating genetic variation across the entire genome, one can address existing questions in a novel way while raising new ones. The latter include how different local environments influence adaptive and neutral genomic variation within and among populations, providing insights into local adaptation of natural populations and their responses to global change. Here, under a seascape genomic approach, ddRAD data of 4609 SNPs from 398 sardines (Sardina pilchardus) collected in 11 Mediterranean and one Atlantic site were generated. These were used along with oceanographic and ecological information to detect signals of adaptive divergence with gene flow across environmental gradients. The studied sardines constitute two clusters (FST=0.07), a pattern attributed to outlier loci, highlighting putative local adaptation. The trend in the number of days with sea surface temperature above 19oC, critical threshold for successful sardine spawning, was crucial at all levels of population structuring with implications on species’ key biological processes. Outliers link candidate SNPs to the region's environmental heterogeneity. Our findings provide evidence for a dynamic equilibrium where population structure is maintained by physical and ecological factors under the opposing influences of migration and selection. This dynamic in nature system, warrants continuous monitoring under a seascape genomic approach that might benefit from a temporal and more detailed spatial dimension. Our results may contribute to complementary studies aimed at providing deeper insights into the mechanistic processes underlying population structuring. Those are key for understanding and predicting future changes and responses of this highly exploited species in the face of climate change. |
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