Phytoplankton composition and abundance in the coastal waters of the Datça and Bozburun Peninsulas, south-eastern Aegean Sea (Turkey)

Taş, Seyfettin

doi:10.12681/mms.418

Cited by 7 publications

(4 citation statements)

References 30 publications

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“…Pseudo-nitzschia species have been commonly observed in studies exploring phytoplankton distribution in Turkish coastal waters (Koray, 1995; Eker & Kıdeyş, 2000; Polat et al , 2000; Türkoğlu & Koray, 2002; Balkis, 2003; Deniz & Tas, 2009; Tas et al ., 2009; Tas & Okus, 2011, 2014). Harmful algal blooms, including Pseudo-nitzschia , have been reported in Turkish coastal waters (Türkoğlu & Koray, 2002; Koray, 2004).…”

Section: Introductionmentioning

confidence: 99%

Temporal and spatial variability of the potentially toxic Pseudo-nitzschia spp. in a eutrophic estuary (Sea of Marmara)

Taş

Lundholm

2016

J. Mar. Biol. Ass.

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Spatial and temporal variability and bloom formation of the potentially toxic diatom Pseudo-nitzschia spp. was investigated weekly to monthly from in a eutrophic estuary, the Golden Horn. Pseudo-nitzschia spp. were detected in 195 of 512 samples (38%) collected throughout the year. Two species, P. calliantha and P. pungens, were identified based on the SEM examination. Blooms of Pseudo-nitzschia occurred in the lower and middle estuary in January and May. The bloom in January mainly comprised P. calliantha. In the bloom in early May, P. calliantha made up 72% of the Pseudo-nitzschia cells and P. pungens 28%. However, the contribution of P. pungens increased to 83% in late May. The Pseudo-nitzschia blooms occurred at low temperature (9-158C) and moderate salinity (17 -18), and for P. calliantha a significant negative correlation was found with temperature and a significant positive correlation with salinity. The percentage of Pseudo-nitzschia cells decreased gradually from lower to upper estuary (59 -14%), correlating with a decrease in Secchi depth (5.5 -0.5 m). Principal components analyses (PCA) were used to explore the spatial and temporal variability of environmental factors in relation to Pseudo-nitzschia abundances, and showed that NH 4 , pH, Secchi depth and DO values were the most important factors reflecting spatial differences, while temperature, salinity, Chl-a and Si:N were more important factors showing temporal differences. High abundances of P. pungens correlated mainly with pH, Secchi depth and DO values, whereas P. calliantha also correlated with NO 3 + NO 2 . Low light availability due to high concentrations of suspended material and very variable environmental conditions (e.g. pH, DO and NH 4 ) may have limited growth of Pseudo-nitzschia in the upper estuary. Regular monitoring of Pseudo-nitzschia is important for improving the understanding of the influence of environmental parameters on bloom dynamics in the study area.

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Section: Introductionmentioning

confidence: 99%

Temporal and spatial variability of the potentially toxic Pseudo-nitzschia spp. in a eutrophic estuary (Sea of Marmara)

Taş

Lundholm

2016

J. Mar. Biol. Ass.

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“…Some previous studies and checklists regarding marine diatoms have been prepared; however, the number of taxa reported so far is relatively low. Checklists (Koray 2001;Balkıs, 2004;Aysel, 2005;Taş & Okuş, 2006) and some other taxonomical research (Ehrenberg, 1844;Hustedt, 1930Hustedt, -1966Çolak Sabancı, 2013;Çolak et al, 2010, 2014Kaleli et al, 2017) revealed that 65 centric diatoms and 249 pennate diatoms (for a total of 304 taxa) have been documented for the Turkish coasts so far. In these surveys, the Black Sea and Sea of Marmara were the areas where most taxa have been reported.…”

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…Previous studies in Turkey indicated that diatoms are generally the most abundant group amongst phytoplankton (Bat et al, 2007;Taş, 2014). Taş (2014) indicated that in the Datça Peninsula, diatoms and dinoflagellates were found as dominants in the phytoplankton. The other records from the Sea of Marmara revealed that diatoms were one of the major groups in the phytoplankton (Deniz & Taş, 2009;Balkıs & Toklu-Alıçlı, 2014;Balkıs & Taş, 2016).…”

Section: Introductionmentioning

confidence: 99%

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Taxonomy and distribution of diatoms on the Turkish Mediterranean Coast, Dalyan (Muğla)

2020

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Diatoms are one of the components in the littoral zone and the most productive in terms of O2 production and primary production. Despite their importance in these coastal ecosystems, the diatoms of littoral zones of Turkish coastlines have been understudied. In this report, we document the littoral diatoms from Dalyan Iztuzu Beach at the southeast coasts of Aegean Sea. Samples were collected from 6 stations in Dalyan Beach between 2012 and 2016. We report here on the occurrence of 9 genera including, Catenula Mereschkowsky, Cymatosira Grunow, Dimeregramma Ralfs, Diplomenora Blazé, Eunotogramma Weisse, Meloneis Louvrou, Danielidis & Economou-Amilli, Neohuttonia Kuntze, Plagiogramma Greville and Tetramphora Mereschkowsky, as well as 40 taxa as newly-recorded from Turkey. The newly-recorded diatoms are characterized in terms of their morphology and illustrated with light micrographs. For each species, their habitat and geographic distribution along the coasts are discussed.

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Phytoplankton variability in relation to some environmental factors in the eastern coast of Suez Gulf, Egypt

Nassar

El-Din

Gharib

2015

Environ Monit Assess

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Water samples were seasonally collected from 12 stations of the eastern coast of Suez Gulf during autumn of 2012 and winter, spring, and summer of 2013 in order to investigate phytoplankton community structure in relation to some physicochemical parameters. The study area harbored a diversified phytoplankton community (138 species), belonging to 67 genera. Four algal groups were represented and classified as Bacillariophyceae (90 species), Dinophyceae (28 species), Cyanophyceae (16 species), and Chlorophyceae (4 species). The results indicated a relative high occurrence of some species namely.; Pleurotaenium trabecula of green algae; Chaetoceros lorenzianus, Proboscia alata var. gracillima, Pseudosolenia calcar-avis, and Pseudo-nitzschia pungens of diatoms; Trichodesmium erythraeum and Pseudoanabaena limnetica of cyanophytes. Most of other algal species were fairly distributed at the selected stations of the study area. The total abundance of phytoplankton was relatively low (average of 2989 unit/L) in the eastern coast of Suez Gulf, as compared its western coast and the northern part of the Red Sea. The diversity of phytoplankton species was relatively high (2.35–3.82 nats) with an annual average of 3.22 nats in the present study. The results concluded that most of eastern coast of Suez Gulf is still healthy, relatively unpolluted, and oligotrophic area, which is clearly achieved by the low values of dissolved phosphate (0.025–0.3 μM), nitrate (0.18–1.26 μM), and dissolved ammonium (0.81–5.36 μM). Even if the occurrence of potentially harmful algae species was low, the study area should be monitored continuously. The dissolved oxygen ranged between 1.77 and 8.41 mg/L and pH values between 7.6 and 8.41. The multiple regression analysis showed that the dissolved nitrate and pH values were the most effective factors that controlled the seasonal fluctuations of phytoplankton along the eastern coast of Suez Gulf during 2012–2013.

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Phytoplankton composition and abundance in the coastal waters of the Datça and Bozburun Peninsulas, south-eastern Aegean Sea (Turkey)

Cited by 7 publications

References 30 publications

Temporal and spatial variability of the potentially toxic Pseudo-nitzschia spp. in a eutrophic estuary (Sea of Marmara)

Temporal and spatial variability of the potentially toxic Pseudo-nitzschia spp. in a eutrophic estuary (Sea of Marmara)

Taxonomy and distribution of diatoms on the Turkish Mediterranean Coast, Dalyan (Muğla)

Phytoplankton variability in relation to some environmental factors in the eastern coast of Suez Gulf, Egypt

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