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Öğe A new species of Perinereis Kinberg, 1865 (Annelida: Nereididae) from the Western Mediterranean Sea revealed by morphological and molecular approaches(Natl Centre Marine Research, 2023) Rezzag, Hiba; Villalobos-guerrero, Tulio F.; Kurt, Guley; Denis, Francoise; Daas, TarekThis study uses morphological and molecular evidence to describe a new intertidal species of Perinereis Kinberg, 1865 (An-nelida: Nereididae) from northeast Algeria. Perinereis louizomarum n. sp. belongs to Subgroup 1A, which is distinguished by a single bar-shaped paragnath on area VI of the proboscis and a dorsal ligule that is either slightly or not expanded in the posterior parapodia. The new species differs from P. cultrifera and similar congeners by having a bare area V and slightly enlarged posterior dorsal ligules. Furthermore, using newly generated and mined sequences from online databases, and mined sequences of Perinere-is species from online, the analysis of cytochrome c oxidase subunit 1 (COI) mitochondrial gene sequences supported its status as new species. An identification key of the Perinereis species belonging to Subgroup 1A is also provided.Öğe Diversity and New Records of Polychaetes (Annelida) in the Sinop Peninsula, Turkey (Southern Black Sea)(Istanbul University Press, 2020) Ciftcioglu, Mulkibar; Kurt, Guley; Kus, SevgiObjective: This study determines the diversity of annelid polychaete species distributed around the coast of Sinop and to identify possible spatial and temporal variations of the Polychaeta community. Materials and Methods: Benthic material was collected from 8 stations using Van Veen grab between October 2013 and July 2014 on the soft bottom of Sinop Peninsula. Results: A total of 90 species belonging to 30 families were identified. Among them, Galathowenia cf. oculata, Rhodine loveni Malmgren, 1865, Paradoneis armata Glemarec, 1966, Paralacydonia paradoxa Fauvel, 1913 and Syllis cf. amica are new records for the Black Sea fauna and Glycera tridactyla Schmarda, 1861 is new for the Turkish coast of the Black Sea. Prionospio (Minuspio) maciolekae Dagli and Cinar, 2011, Micronephthys longicornis (Perejaslavtseva, 1891) and Protodorvillea kefersteini (McIntosh, 1869) were the most frequent and dominant species in the study area. The highest mean number of species (29 species) was found in spring at station G2; the lowest mean number of species (4 species) was determined at station G3 in winter. The highest mean density value (9470 ind. m-2) was determined at G2 station in summer; the lowest mean density value (357 ind. m-2) was calculated in autumn at station G5. Conclusion: The Polychaeta diversity on the soft bottom of the Sinop Peninsula was analyzed and four species were newly recorded for the Black Sea fauna and one for the Turkish Black Sea fauna. © Istanbul University Press. All rights reserved.Öğe Diversity of Annelida from the coasts of Turkiye(Tubitak Scientific & Technological Research Council Turkey, 2024) Cinar, Melih Ertan; Acik, Sermin; Kurt, Guley; Dereli, Deniz ErdoganThe compilation of scientific papers dealing with marine annelids (including Sipuncula) along the coasts of T & uuml;rkiye (Black Sea, Sea of Marmara, Aegean Sea, and Levantine Sea) together with the new records of polychaete species (21 species) presented in this study resulted in a list of 827 species belonging to 63 families. Polychaeta were represented by 782 species, Sipuncula by 21 species, Oligochaeta by 18 species, Hirudinea by 5 species, and Echiura by 1 species. Syllidae (127 species), Spionidae (57 species), and Serpulidae (56 species) were the most species-rich families and their numbers varied among the seas. Most annelid species were benthic (808 species), 14 species were pelagic, and 5 species (leeches) were parasitic. The Aegean Sea had the highest number of species (634 species), followed by the Levantine Sea (566 species) and the Sea of Marmara (479 species). A total of 72 alien annelid species were reported from the region, with the highest number of alien species (64 species) being found in the Levantine Sea and the lowest number of alien species (3 species) in the Black Sea.Öğe First record of the Lessepsian nereidid Pseudonereis anomala Gravier, 1899 (Annelida: Nereididae) in the western Mediterranean Sea(Cahiers De Biologie Marine, 2021) Kurt, Guley; Rezzag-Mahcene, Hiba; Kus, Sevgi; Daas, Tarek; Villalobos-Guerrer, Tulio F.This is the first record of the Lessepsian polychaete Pseudonereis anomala Gravier, 1899 in the western Mediterranean Sea, specifically in Skikda Bay, Algeria. The species was collected among rocks covered by algae at 0.5 m depth. A characterization of the species, as well as some ecological and distributional aspects are provided.Öğe Integrated assessment of eutrophication in the southern Black Sea waters, using the Nested Environmental Status Assessment Tool(Pergamon-Elsevier Science Ltd, 2023) Tan, Ibrahim; Atabay, Hakan; Evcen, Alper; Kurt, Guley; Taskin, Ergun; Beken, Colpan PolatThis research deals with the land-based pressures on the southern Black Sea coast (Turkey), with the objective of assessing their eutrophication impacts. In this context, reference values of some of the eutrophication indicators were calculated, and eutrophication assessment was carried out for this area using the holistic approach NEAT (Nested Environmental Status Assessment Tool). In addition, correlations between NEAT results of coastal regions and pressure-impact analysis methods were investigated. In the determined Spatial Assessment Unit (SAU) areas, 9 indicators were evaluated according to the SAU surface, both with and without weighting by their size the overall assessment of the Turkish Black Sea coast is good (0.70) and moderate (0.57) environmental status, for non-weighting and weighting by SAUs, respectively, with a high confidence level. With this study, we concluded that the sensitivity of the assessment tool needs to be increased. Despite these results, an appropriate number of indicators to represent the water column should be added. It is important to include the phytoplankton variable in the evaluation in future studies. In addition, this study, which uses NEAT allows identifying problematic environmental areas that require attention and action from managers and policymakers.Öğe Long-term changes and causes of biota assemblages in the southern Black Sea coasts(Taylor & Francis Ltd, 2024) Bat, Levent; Kurt, Guley; Mulayim, Aysegul; Caglar, Senem; Oztekin, AysahThe presence of biota in the Black Sea is mostly determined by seawater temperature and salinity. The consensus of many scientists doing research on global warming is that in 2100, the average air temperature will be increase than today's values. With climate changing, precipitation rates will change due to the Black Sea water temperature and the changing atmospheric regime, causing an unbalanced entry of nutrients into the sea, and as a result, excessive plankton proliferation may occur. This may mean that the habitats of the species in the Black Sea are further limited. The increases in sea levels may not be serious, but there is no doubt that there will be some increases. These increases will affect the coastal ecosystem, especially the rich living life in the region where the waves hit the shore, which we call the wave zone, will be adversely affected. These predictions should be followed up with regular scientific monitoring studies and it should be investigated how biota from invertebrates to fish are affected by the changes. This review explored and discussed the long-term changes and causes of biota communities on the southern coast of the Black Sea.Öğe Macro-benthic invertebrates associated with the black sponge Sarcotragus foetidus (Porifera) in the Levantine and Aegean Seas, with special emphasis on alien species(Academic Press Ltd- Elsevier Science Ltd, 2019) Cinar, Melih Ertan; Bakir, Kerem; Dogan, Alper; Acik, Sermin; Kurt, Guley; Katagan, Tuncer; Ozturk, BilalThe fauna associated to the sponge Sarcotragus foetidus was studied in two eco-regions of the Mediterranean Sea, the Aegean and Levantine Seas. A total of 134 species belonging to 8 taxonomic groups were determined. Different species assemblages were encountered in the eco-regions, mainly due to the importance of some alien species (Red Sea invaders) on sponge communities. Among community parameters, only the number of species differed significantly among the sub-regions. The number of species and the number of individuals were significantly and positively correlated with the sponge volume. The species assemblage patterns determined were significant correlated with a set of environmental variables such as nitrogen, phosphate and dissolved oxygen. Some alien species such as the ophiuroid Ophiactis savignyi and the polychaete Leonnates indicus densely invaded porous systems of sponges in the Levantine Sea, indicating the magnitude of impacts of alien species on the eastern Mediterranean ecosystem. In the Levantine Sea, the alien species accounted for 34% of total number of individuals of macro-invertebrates associated with sponges, but the percentage rose up to 64% in Iskenderun Bay (eastern-most point of studied area). The biotic index ALEX detected a moderate ecological status in the area in terms of the impacts of alien species on native biodiversity.Öğe Nephtyidae (Annelida: Polychaeta) from the Sea of Marmara and Black Sea, with descriptions of two new species(Magnolia Press, 2021) Kus, Sevgi; Kurt, Guley; Cinar, Melih ErtanThe present paper deals with the diversity of nephtyid polychaetes (Nephtyidae) from the Sea of Marmara and the Black Sea. Three species belonging to two genera (Micronephthys and Nephtys) were found in the Black Sea (coast of Turkey) and six species belonging to three genera (Inermonephtys, Micronephthys and Nephtys) were found in the Sea of Marmara. The material includes two species new to science, Inermonephtys turcica n. sp. and Nephtys sinopensis n. sp., and a species record (Nephtys kersivalensis McIntosh, 1908) new to the Sea of Marmara's marine fauna. Nephtys sinopensis n. sp. is mainly characterized by having 1-4 geniculate chaetae in the postacicular position of the parapodia; digitiform antennae, palps, and ventral cirri at chaetiger 1 with swollen tips; small and cirriform branchiae present from chaetiger 4 to the end of the body; poorly developed parapodial prechaetal lamellae in median and posterior chaetigers and long ventral cirri along the body. Inermonephtys turcica n. sp. is mainly characterized by having cushion-like palps with digitiform tips; well developed neuropodial postchaetal lamellae; barred chaetae in preacicular position of the anterior and median parapodia; and branchiae first appearing between chaetiger 3 and 13 (depending on body size).Öğe The polyclad fauna (Platyhelminthes, Rhabditophora) of the Sinop Peninsula (Black Sea, Turkey) with a description of a new species of Cryptocelis Lang, 1884(Natl Centre Marine Research, 2021) Gammoudi, Mehrez; Bulnes, Veronica N.; Kurt, GuleyBetween October 2013 and July 2014, 40 polyclad specimens were collected during systematic sampling of mussel beds along the coast of the Sinop Peninsula (Western Black Sea). Six species were identified, including a new Cryptocelis species. Cryptocelis sinopae sp. nov. is characterized by possessing a prostatic vesicle lined with a ridged fold in its anterior end and the presence of two secretory glandular folds in the distal dorsal wall of the male atrium. Additionally, new records of Echinoplana celerrima Haswell, 1907 and Leptoplana mediterranea (Bock, 1913) are reported for Turkey and the Black Sea, as well as Leptoplana tremellaris (Muller OF, 1774) and Prosthiostomum siphunculus Delle Chiaje, 1822 for the coast of the Black Sea of Turkey. A short description of the reproductive behaviors of Pleioplana okusi Bulnes, Kalkan and Karahan, 2009 and Cryptocelis sinopae sp. nov. are provided.
