Mediterranean Marine Science最新文献

{"title":"Investigating the nursery function of the Alboran MPA on the Mediterranean coast of Morocco","authors":"H. Masski, Jamal Settih, Soukaina Ragmane, Imane Tai, Meriem Benziane, Mohamed Naji","doi":"10.12681/mms.35798","DOIUrl":"https://doi.org/10.12681/mms.35798","url":null,"abstract":"Coastal habitats provide shelter and food for juvenile fish, ensuring their survival and supporting a range of species that are both commercially and ecologically important. The Alboran Marine Protected Area (MPA) off the Mediterranean coast of Morocco has been identified as a nursery area, although this role has never been the subject of characterisation. This study investigates the nursery function of habitats at six sites, two of which have seasonally flooded rivers with small persistent lagoons (transition systems) actively connected to the sea. Mixed sand-and-gravel beaches and transition systems were surveyed using a beach seine (four hauls) during two consecutive summer periods (June 2019 and July 2020), and a beam trawl was used in July 2020 in order to survey shallow waters at three depths: 3, 5 and 7 m. The use of both fishing methods provided a comprehensive assessment of juvenile fish communities. Different habitats in these coastal areas supported juvenile fish of 31 different species, with higher species richness and densities of young-of-the-year (YOY; first year of life) fish in transition systems despite their limited surface area and depth. Shallow marine waters supported fish species with specific microhabitat requirements despite lower overall YOY fish densities. The Alboran MPA coast has a nursery function, with different habitats acting as nurseries for juveniles of different fish species, creating a seascape of interconnected nursery habitats. As low densities of juvenile fish were a common concern across species and habitats, protecting these nursery habitats through enforcement of their protection regime appears to be a priority.","PeriodicalId":506559,"journal":{"name":"Mediterranean Marine Science","volume":"7 7","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141654227","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Towards Cross-Border Fisheries Management: An Analysis of Fleet Structures and Species-Specific Regulatory Measures in the Aegean Sea","authors":"H. Dereli̇, Vahdet Ünal, Aylin Ulman, Ioannis Giovos, Zafer Tosunoğlu, G. Prodromitis, Dimitrios K. Moutopoulos","doi":"10.12681/mms.35526","DOIUrl":"https://doi.org/10.12681/mms.35526","url":null,"abstract":"Intrinsic differences in the applied management measures of shared stocks in transboundary waters inhibit the ability of either state to benefit from such measures, as one state may benefit in lieu of the other, thus reducing the efficacy of both. This study compares for the first time the fleet structure, specific management measures applied to species-specific regulations for commercial fishing, species listed in official monitoring schemes, and protected taxa between Greece and Türkiye for the Aegean Sea. A comparative analysis utilizing the official data was sourced from both countries. Large-scale Greek and Turkish fishing fleets have been modernized within the last 30 years (1991-2021). Greek and Turkish large-scale fishing fleets included smaller trawlers with lower tonnage and slightly higher engine horsepower, while purse seines of both states included larger vessels with higher horsepower and tonnage. This indicates that the fishing pressure on the demersal resources in the Aegean Sea has partially decreased, but the fishing pressure on pelagic resources has increased despite the decrease in the number of vessels. Only 11 out of 74 minimum conservation reference sizes (MCRS) are sufficiently set above the Lm50 sizes they should be based on, whereas 18 species need reproductive studies, and 22 are set below the Lm50, and could benefit from an increase. The application of specific closed seasons for commercial species was used by both states with the intent to protect the reproductive periods of some stocks. However, several of these closure periods did not fully or even partially cover the spawning periods of the respective species. Species-specific closures were applied to 13 species in Greece and 23 species in Türkiye, with only two fish species (Xiphias gladius and Thunnus thynnus) listed for both countries. Only 14 species (out of 34 protected by Greece and 46 by Türkiye) are protected by both states, most of which are listed as critically endangered by the International Union for Conservation of Nature and Natural Resources (IUCN). Harmonization of fisheries management measures currently does not align between the two neighbouring states, and the General Fisheries Commission of the Mediterranean is the competent authority that would be able to restructure such measures, especially as Türkiye has been aligning their measures with that of the EU for the accession process. This contribution highlights the clear differences between Greece and Türkiye, and provides advice for developing a unified management regime for the Aegean Sea.","PeriodicalId":506559,"journal":{"name":"Mediterranean Marine Science","volume":"14 10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141655106","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The reproductive pattern of the white barrel jellyfish Rhizostoma pulmo (Cnidaria, Scyphozoa) in the gulf of Taranto (Ionian Sea)","authors":"M. Mammone, Lorena Basso, Lucia Rizzo, Amrutha Aravind, Patrizia Pagliara, Stefano Piraino","doi":"10.12681/mms.37263","DOIUrl":"https://doi.org/10.12681/mms.37263","url":null,"abstract":"Understanding the mechanisms that lead to the proliferation of large jellyfish populations over time is crucial to prevent andmitigate any possible negative impacts on human activities and ecosystem functioning. Rhizostoma pulmo (Macri, 1778) is an outbreak forming species of the Mediterranean Sea that has been observed in anthropized areas including the Gulf of Taranto. To describe seasonal changes in the reproductive patterns of R. pulmo from May to December 2016, we measured jellyfish diameter, the number and diameter of oocytes using histological and biochemical analyses (lipids, carbohydrates, proteins, and organic matter), as well as the gonadal somatic index (GSI). Jellyfish size did not fluctuate considerably during the collection period, with specimens measuring between 19.5 and 38.2 cm in diameter. Our findings revealed a strong gonadal activity over the summer and a spawning event between September and October. Male and female gonad morphology was similar to other previously reported Rhizostomeae. Oocytes were categorized into three developmental classes, recognizable by their diameter and shape: <15 μm for pre-vitellogenesis, 15-30 μm for vitellogenesis, and >30 μm mature oocytes. The number of mature oocytes peaked in August, with smaller eggs recorded in May and October and larger eggs recorded near the end of the summer. The GSI fluctuated greatly between sampling dates, peaking in August. Lipid levels varied significantly throughout the sampling period, with the greatest value in May (277.26±98 μg lipid mg AFDW-1) and the lowest in September (70.36±41.5 μg lipid mg AFDW-1). Carbohydrates, proteins, and organic matter (62 ± 6 %) remained stable during the sampling period. The biochemical analyses of jellyfish sexual reproduction we report on here can be used as a tool for identifying jellyfish spawning periods and better understanding the reproductive process that control jellyfish population dynamics.","PeriodicalId":506559,"journal":{"name":"Mediterranean Marine Science","volume":" 917","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141668984","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Damage assessment on the discarded macro-benthic fauna in the Italian striped venus clam (Chamelea gallina) fisheries","authors":"G. Bargione, Stefano Guicciardi, M. Virgili, Giulio Barone, A. Lucchetti","doi":"10.12681/mms.36618","DOIUrl":"https://doi.org/10.12681/mms.36618","url":null,"abstract":"The striped venus clam fishery in Italy is carried out by means of hydraulic dredges and it is one of the most important socio- economic activities in the Italian fisheries sector. Dredging has traditionally been considered among fishing activities with the greatest impact at the ecosystem level. Here, therefore, we investigated the disturbance level exerted by dredging on the studied area. Also, damage and mortality rates exerted by dredging on the discarded macro-benthic fauna living associated with Chamelea gallina during the summer season were investigated using a four-level damage scale, given three different haul time duration (3, 6 and 9 minutes). Despite the fact that macro-benthic fauna represented on average only 4.4% of the total catch, the most represented taxa in terms of both abundance and number were Malacostraca, Bivalvia, and Echinoidea. The analysis of the macro-benthic communities’ structure between hauls revealed that the species composition was very similar, and ABC plots together with the Warwick Statistics (W) revealed a moderately disturbed macro-benthic community. No significant difference was found in damage and mortality rates between hauls duration when stratified at taxon or species level. Overall, 61.0% of individuals of the catch were undamaged, whereas 16.1%, 3.7%, and 19.2% displayed slight, intermediate, and severe damage, respectively. We found that soft-shelled or soft-bodied species were the most affected by the harvesting process, whereas thick-shelled or thick-bodied species suffered the slightest damage. In particular, the species suffering major (severe) damage were the sea urchin Echinocardium cordatum (84.6%), the bivalves Mactra stultorum and Polititapes aureus (32.5% and 20.0%, respectively), the crab Liocarcinus vernalis (4.0%), and the sea star Astropecten irregularis (4.8%). The overall mortality rate of all discarded individuals was 22.9%, with E. cordatum showing the highest mortality rate of 96.0%. These findings highlight the importance of guaranteeing the integrity of the entire ecosystem through the adoption of suitable management plans and actions.","PeriodicalId":506559,"journal":{"name":"Mediterranean Marine Science","volume":"123 12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141667596","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Trophic positioning among native and non-indigenous species in the eastern Mediterranean Sea","authors":"Suna Tüzün, A. Gücü","doi":"10.12681/mms.36966","DOIUrl":"https://doi.org/10.12681/mms.36966","url":null,"abstract":"The substantial influx of non-indigenous species (NIS) into the eastern Mediterranean Sea from the Suez Canal has prompted questions about the mechanisms enabling their establishment and the resulting impacts on native species. We focus on the trophic level dynamics of the dominant native red mullet (Mullus barbatus) and the four NIS Pomadasys stridens, Upeneus moluccensis, U. pori, and Parupeneus forsskali. Using various methods, including trophic level estimations, intestine length analysis, and monthly trophic level variations, we assessed their trophic positions and flexibility. The results indicate that compared to M. barbatus, P. stridens occupies a lower trophic level due to its omnivorous nature, potentially facilitating its biomass increase. This lower trophic position is further supported by its lengthy intestine relative to size. Conversely, U. moluccensis, U. pori, and P. forsskali position themselves consistently at higher trophic levels than M. barbatus. Monthly trophic level variations suggest temporal dietary changes, which point to seasonal impacts on NIS success. M. barbatus’s resilience, including its preference for polychaetes, may explain its sustained dominance amid competition. This study sheds light on NIS-native species coexistence, further suggesting that NIS success could stem from exploitation of vacant niches and adaptation to new food sources.","PeriodicalId":506559,"journal":{"name":"Mediterranean Marine Science","volume":"114 18","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141666699","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Genetic characterization, age and reproductive status of dwarf sperm whales (Kogia sima) stranded along the Italian coastlines","authors":"N. Maio, T. Fioravanti, Lucrezia Latini, A. Petraccioli, M. Mezzasalma, Gianni Insacco, A. Splendiani, F. Pollaro, F. Guarino, V. Caputo Barucchi","doi":"10.12681/mms.35701","DOIUrl":"https://doi.org/10.12681/mms.35701","url":null,"abstract":"The knowledge of the life history traits of cetaceans, especially in the case of species that are difficult to observe in the wild, often benefits from the study of stranded individuals. The dwarf sperm whale (Kogia sima) is a vagrant cetacean species in the Mediterranean Sea, which is rarely sighted in water and occasionally is found stranded along the Italian coasts. In this work, we investigated the genetics, age, and reproductive status of three dead individuals (1 male, 1 female, 1 unsexed), stranded in three different sites along Italian coastlines. We used mitochondrial DNA markers for tracing the geographical origin of the animals, tooth sectioning as a proxy for their age estimation and gonadal histology for evaluating their reproductive status. Genetic analyses revealed that the male and the female are K. sima belonging to the Atlantic clade (A clade). The female, with a total body length (TBL) of 1.95 m, had an estimated age of 12 years, and ovaries with one corpus luteum. The male, with a TBL of 2.07 m, had testicles in late spermatogenesis and an estimated age of 22-24 years. From the unsexed individual, which had an estimated age of at least 20 years, no gonadal samples were obtained as it was stranded as a skeleton. Our findings will contribute to increase the knowledge of some unexplored provenance and life-history traits of K. sima visiting the Mediterranean.","PeriodicalId":506559,"journal":{"name":"Mediterranean Marine Science","volume":" 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141675551","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Diversity of marine Amphipods (Crustacea, Peracarida) from the North African shelf of the Mediterranean Sea (Morocco, Algeria, Tunisia, Libya, Egypt). An updated checklist for 2023","authors":"A. Bakalem, J. Dauvin, Mohamed Menioui","doi":"10.12681/mms.35974","DOIUrl":"https://doi.org/10.12681/mms.35974","url":null,"abstract":"An updated checklist for 2023 is given for the amphipods recorded on the continental shelf of five countries in North Africa bordering the southern Mediterranean Sea: Morocco, Algeria, Tunisia, Libya and Egypt. This revision incorporates the checklist of amphipods from two countries, Algeria and Tunisia and provides the first checklists for Morocco, Libya and Egypt. The total number of species recorded in the entire Southern Mediterranean Sea is 454. The number of species is much higher in the western basin than in the eastern or central parts of the Mediterranean Sea. The Algerian fauna accounts for the highest number of species (with 342), while the lowest is found in Egypt (with 100). The other checklists are for Morocco (241 species), Tunisia (167 species) and Libya (138 species). Among the 454 species making up the overall checklist, 95 species (21%) are considered as endemic to the Mediterranean Sea. The Caprellidae Leach, 1814 represent the most diversified family with 34 species. Five other families account 20 species or more, i.e., the Ampeliscidae Krøyer, 1842 (33 species), the Aoridae Stebbing, 1899 (25 species), the Ischyroceridae Stebbing, 1899 (21 species), the Corophiidae Leach, 1814 (21 species) and the Maeriidae Krapp-Schickel, 2008 (20 species). Only 15 species are non-indigenous species or cryptogenic species. There is a trend of decreasing diversity of benthic amphipods from the western to the eastern parts of the Southern Mediterranean Sea; the greatest number of pelagic amphipod species has been observed in the Egyptian coast. Only eight species have been reported from abyssal depths off the Algerian coast. Twenty-seven species were found along the entire North African coast, including four Ampelisca (A. brevicornis, A. diadema, A. tenuicornis and A. typica), four Maeridae (Elasmopus pocillimanus, E. rapax, Maera grossimana and Quadrimaera inaequipes) and three Lysianassidae (Lysianassa costae, L. pilicornis, and Lysianassina longicornis). Future research should be focused on deep-sea habitats, on specific or unexplored habitats such as seagrass meadows (Posidonia oceanica, Zostera spp. and Cymodocea nodosa) and coralligenous formations as well as on the south-eastern part of the Mediterranean Sea.","PeriodicalId":506559,"journal":{"name":"Mediterranean Marine Science","volume":" 2","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141674635","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"First checklist of free-living marine nematodes from the Israeli coast of the Mediterranean","authors":"Zoya Harbuzov, Moshe Tom, Roberto Danovaro, C. Gambi, L. Carugati, H. Lubinevsky, N. Lampadariou","doi":"10.12681/mms.35375","DOIUrl":"https://doi.org/10.12681/mms.35375","url":null,"abstract":"This study presents an inventory of free-living marine nematodes from the deep waters of the southeastern part of the Levantine Basin. The meiofauna of this area, particularly the free-living marine nematodes, have been poorly investigated; hence, the present study has regional zoo-geographic importance. To fill this knowledge gap, nematodes were collected from the upper 0-3 cm sediment horizon from a transect located perpendicular to the Israel coast off Tel Aviv, with depths ranging between 76 and 1400 m. Our sampling yielded a diverse assemblage of nematodes representing 65 species belonging to 54 genera and 22 families. About 38% of the species have been previously reported in the Mediterranean; the remaining 62% are reported for the first time. A taxonomic checklist provides information on the worldwide distribution of the encountered species. This checklist provides a baseline for understanding the nematode community in this region and serves as a valuable resource for future studies.","PeriodicalId":506559,"journal":{"name":"Mediterranean Marine Science","volume":"97 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141682897","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"New records of rarely reported species in the Mediterranean Sea (March 2024)","authors":"Markos Digenis, O. Akyol, Laure Benoit, Marina BIEL-CABANELAS, Öznur Yazilan Çamlik, Konstantinos Charalampous, A. Chatzispyrou, F. Crocetta, M. Deval, I. Di Capua, F. Domenichetti, Nikola Đorđević, Silvio Ferruzzi, M. Galiya, M. Gammoudi, J. García-Charton, Daniele Grech, R. Hoffman, J. Langeneck, Michela Martinelli, F. Mastrototaro, B. Mavrič, C. Navarro‐Barranco, E. Okudan, V. Orenes-Salazar, M. Orlando-Bonaca, Ranim Μ. Othman, S. Petović, Matteo Putignano, J. RENOULT P., Juan Manuel Ruíz, Andreu Santín Muriel, E. Taşkın, Francesco Tiralongo, Zafer Tosunoğlu, I. Tuney, Andrea Tursi, Jessica Vannini, L. Zacchetti, L. L. Zamuda, V. Gerovasileiou","doi":"10.12681/mms.37214","DOIUrl":"https://doi.org/10.12681/mms.37214","url":null,"abstract":"This Collective Article presents information about 30 species with records in eight countries (Greece, Israel, Italy, Montenegro, Slovenia, Spain, Syria and Türkiye) and six ecoregions extending from the Alboran to the Levantine Seas. The recorded species belong to eight Phyla (4 Chlorophyta, 1 Rhodophyta, 1 Porifera, 3 Cnidaria, 2 Platyhelminthes, 2 Arthropoda, 2 Mollusca and 15 Chordata) as follows: Chlorophyta: Didymosporangium repens, Ochlochaete hystrix and Phaeophila hirsuta are reported for the first time from the Aegean coasts of Türkiye and Penicillus capitatus is firstly recorded in Slovenian coastal waters; Rhodophyta: Ptilophora dentata is recorded for the first time in Turkish coasts, from the entrance of a marine cave; Porifera: Tethya meloni is reported from Montenegrin waters; Cnidaria: Savalia savaglia and Dendrophyllia ramea are firstly observed north of the Almeria-Oran front in the southeastern Iberian Peninsula, while Spinimuricea cf. atlantica is firstly recorded in the Gulf of Lion constituting the easternmost record of the species in the Mediterranean Sea; Platyhelminthes: the polyclad flatworms Thysanozoon brocchii and Planocera graffi are reported for the first time from Greek waters, observed inside marine caves; Mollusca: Ascobulla fragilis is firstly reported from the Eastern Levantine Sea while the blanket octopus Tremoctopus violaceus is recorded in Izmir Bay constituting its fifth sighting in the Aegean Sea after a quarter of a century; Arthropoda: the copepod Ditrychocorycaeus africanus is firstly recorded in the Ionian Sea while the tufted ghost crab Ocypode cursor is detected further north in the Tyrrhenian Sea; Chordata: the bothid flounder Arnoglossus grohmanni is firstly reported in Spain while specimens of the rare bythitid Bellottia apoda are presented for the Adriatic Sea; the chondrichthyans Chimaera monstrosa, Dalatias licha, Heptranchias perlo, Leucoraja circularis, Mustelus mustelus, Oxynotus centrina, Squatina aculeata and Torpedo marmorata are presented as collected within 13 continuous years in the bathyal zone of the Antalya Bay; the speleophilic fish Grammonus ater is firstly recorded in the Alboran Sea, observed in a marine cave; the critically endangered sandy ray Leucoraja circularis is reported from the eastern Ionian Sea; the crested oarfish Lophotus lacepede is reported for the first time from Sardinia, based on evidence dating back 20 years; the white trevally Pseudocaranx dentex is firstly recorded in Tremiti Islands (Adriatic Sea, Italy) while the phaeton dragonet Synchiropus phaeton and the gobid Zebrus pallaoroi are firstly reported from Syrian and Italian waters, respectively.","PeriodicalId":506559,"journal":{"name":"Mediterranean Marine Science","volume":"80 23","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140377742","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Spatial pattern of sea surface temperature and chlorophyll-a trends in relation to hydrodynamic processes in the Alborán Sea","authors":"B. Abdellaoui, Federico Falcini, Tarik Baibai, Karim KARIM HILMI, O. Ettahiri, R. Santoleri, Rachida Houssa, H. Nhhala, H. Er-Raioui, Laila Oukhattar","doi":"10.12681/mms.30268","DOIUrl":"https://doi.org/10.12681/mms.30268","url":null,"abstract":"Environmental conditions such as temperature, planktonic biomass, and ocean currents play an important role in the development and distribution of marine species. This work aims to estimate, in a high spatial resolution, the actual trends of sea surface temperature (SST) and chlorophyll-a concentration (Chl-a) and to assess the relationship with the local hydrodynamic conditions in the Alborán Sea. To investigate these objectives, time series of SST and Chl-a of satellite sensor data were analyzed during 20 years from January 2001 to December 2020, using the Seasonal-Trend-Loess (STL) decomposition method and the Mann-Kendall seasonality test. The results, obtained with a 95% of confidence, showed that the Alborán Sea basin is subject to sea surface warming evaluated at 0.027 ± 0.008 ° C per year, related to the warming of the Atlantic water mass, which contributes to a decrease of productivity evaluated at -0.0024 ± 0.0003 μg /l per year of Chl-a concentration. These trends are not homogeneous over the entire basin area but show a large regional variation between different parts of the Alborán Sea due to the hydrodynamic process of the Atlantic Jet - Western Alboran Gyre system (AJ-WAG), which is more active especially in summer/autumn seasons and contribute largely to these changes by mixing the waters of the Atlantic Ocean and the Mediterranean Sea.","PeriodicalId":506559,"journal":{"name":"Mediterranean Marine Science","volume":" 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-03-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140387300","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}