Gorgan Bay: a microcosm for study on macrobenthos species-environment relationships in the southeastern Caspian Sea

Ghasemi, Amir Faraz; Taheri, Mehrshad; Foshtomi, Maryam Yazdani; Noranian, Majid; Mira, Seyed Sahab; Jam, Armin

doi:10.1007/s13131-015-0728-2

Cited by 6 publications

(4 citation statements)

References 35 publications

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“…In this study, the highest abundance was observed in summer which mainly related to Streblospio species of polychaetes (Angulo-Preckler et al, 2017). Ghasemi et al (2016) studied on macrobenthos Gorgan Bay and indicated that the dominance of the Streblospio community (Kosari et al, 2009). In another study by Jalili et al, (2010) on macrobenthos in Bandar Anzali in Gilan Province the macrobenthos fauna of the southwestern part of Wetland was carried out.…”

Section: Introductionmentioning

confidence: 51%

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Temporal and spatial changes of macrobenthos communities in south east shores of the Caspian sea

Javandel

Akhoundian²

2021

Nexo Revista Científica

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In this research, Sampling of macrobenthos of Mazandaran beaches was performed in 7 stations at two depths of 5 and 10 meters during four seasons in 2020 using a grab with 8 replications in each station. In this study, a total of 10472 individuals were counted, which belonging to 22 species from 13 families. The highest frequency of macrobenthos (648 ± 170.79) was observed in spring and the highest amount of biomass (36.21 ±2.5 gr / m2) was observed in winter. Moreover, the highest prevalence of macrobenthos predominant groups during the sampling period was observed in Bivalves (40%), Crustaceans (36%), Annelids (22%) and Gastropoda (2%), respectively. The results of PERMANOVA analysis showed that the effect of two factors of season and depth impacted the biomass, abundance, species richness, species composition and community structure of macrobenthos significantly. Furthermore, the results showed that with increasing the depth from 5 to 10 meters, macrobenthos abundance increased by 4, 2, 1 and 9 times in spring, summer, autumn and winter, respectively. Moreover, increase in depth from 5 to 10m, the values of biomass and species richness have increased. In according to these results, it can be concluded that biomass and diversity index of macrobenthos communities change considerably in different seasons and depths. Therefore, natural changes of these variables should be considered when using these macrobenthos communities to assess the impact of environmental factors.

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Section: Introductionmentioning

confidence: 51%

“…A total of 476 invertebrate species have been identified in the Caspian Sea, 46% of which are native to the Caspian Sea and more than 20% of which are non-native. Most of them are including benthic communities (Ghasemi et al, 2016;Farshchi et al, 2018). These organisms are the most important food source for fish.…”

Section: Introductionmentioning

confidence: 99%

Temporal and spatial changes of macrobenthos communities in south east shores of the Caspian sea

Javandel

Akhoundian²

2021

Nexo Revista Científica

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“…In the southern parts with a salinity of 12-13 ppm., brackish and euryhaline marine species predominate (Ghasemi et al, 2016) and demonstrate the distribution and colonization potential of pelagic, nektonic, and benthic organisms in this area (Ghasemi et al, 2014). The macrobenthos composition changed after the invasion of the comb jelly Mnemiopsis leidyi, which appeared in the late 1990s in the CS (Roohi et al, 2010).…”

Section: F I G U R E 4 Principal Component Analysis Spatial Presentation Of Eight Areas and Four Seasonsmentioning

confidence: 86%

Spatial distribution and diversity of commercial demersal fish species in the shelf waters of the Caspian Sea

et al. 2021

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“…The Gorgan Bay is a large (550 km 2 area), shallow (4.5 m max. depth) inlet at the extreme southeast corner of the Caspian Sea, almost totally cut off from the Caspian Sea by the Miankaleh Peninsula (Gharibreza et al., 2018; Ghasemi et al., 2016). The Anzali Wetland complex in the western part of the southern Caspian Sea is a freshwater lagoon (191 km 2 area) fed by many rivers (e.g., Chafroud, Bahambar, Morghak, Masal, Palangvar, Masolehrodkhan, Pasikhan, Siahdarvishan, Lakanroud, and Siahroud; Abbasi et al., 2019) and separated from the sea by a dune system.…”

Section: Discussionmentioning

confidence: 99%

Genealogical concordance, comparative species delimitation, and the specific status of the Caspian pipefish Syngnathus caspius (Teleostei: Syngnathidae)

et al. 2020

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To evaluate the specific validity of the Caspian pipefish Syngnathus caspius, we used a comparative molecular species delimitation method on a COI barcode library of Syngnathus, as well as principles of genealogical concordance. Comparative species delimitation allowed us to delineate putative species without a priori assignment of individuals to nominal species, while genealogical concordance extended our species delimitation results to multiple genes, multiple codistributed species, and comparisons with biogeographic evidence. All species delimitation analyses including two topology‐based, one network‐based, and one distance‐based analysis showed genetically isolated lineages of pipefish in the Black and Caspian Sea, corresponding to S. abaster and S. caspius, respectively. Mean evolutionary divergence between the two lineages (0.029) was within the range separating species of Syngnathus (0.024–0.217). The interclade/intraclade ratio of variation was comparable to the operational criterion of divergence between clades greater or equal to 10 × the level within clades to recognize separate species. Our argument on taxonomic validity of S. caspius is also supported by the principles of genealogical concordance as a conceptual basis for recognition of biological species. As a second objective, using a limited number of S. caspius specimens from two semi‐confined water bodies along the Caspian Sea south coastal zone (i.e., Anzali Wetland in the west and Gorgan Bay in the east), we searched for a possible matrilineal structure. The retrieved phylogeographic pattern was characterized by a shallow genealogy and lineage distributions varied, most probably caused by low to modest contemporary gene flow between populations of S. caspius across the southern Caspian Sea that are linked tightly through history.

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Gorgan Bay: a microcosm for study on macrobenthos species-environment relationships in the southeastern Caspian Sea

Cited by 6 publications

References 35 publications

Temporal and spatial changes of macrobenthos communities in south east shores of the Caspian sea

Temporal and spatial changes of macrobenthos communities in south east shores of the Caspian sea

Spatial distribution and diversity of commercial demersal fish species in the shelf waters of the Caspian Sea

Genealogical concordance, comparative species delimitation, and the specific status of the Caspian pipefish Syngnathus caspius (Teleostei: Syngnathidae)

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