Phytoplankton distribution in the Caspian Sea during March 2001

Kıdeyş, Ahmet E.; Soydemir, N.; Eker, Elif; Vladymyrov, Vladimir; Soloviev, Dmitry M.; Mélin, Frédéric

doi:10.1007/s10750-004-6953-x

Cited by 21 publications

(23 citation statements)

References 26 publications

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“…Kideys et al (2008) also revealed that after 1999 chlorophyll a levels gradually increased and reached extremely high levels of 9.00 μg L -1 in August 2001 using satellite imagery. In addition, the average chlorophyll a value for the Caspian Sea was calculated as 1.63 μg L -1 in March 1998 (Kideys et al 2005) and as 2.62 μg L -1 in 2001 by Kideys et al (2005). In our study, the annual average chlorophyll a value during the sampling period was calculated by far higher (9.26 ± 3.54 μg L -1 ) than those reported in previous studies.…”

Section: Quantitative Phytoplankton Compositioncontrasting

confidence: 58%

“…Similarly, during the present study, temperature variation in the surface waters varied between 6.80°C (in winter) and 29.8°C (in summer). Kideys et al (2005) reported that temperature was an important factor in the fluctuations of phytoplankton composition in the Caspian Sea. They showed that diatoms were dominant in the colder waters of the eastern Caspian Sea, while dinoflagellates were prevalent in the warm waters of the southern Caspian Sea.…”

Section: Quantitative Phytoplankton Compositionmentioning

confidence: 99%

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Phytoplankton Species Composition and Abundance in the Southwestern Caspian Sea

Bagheri

Mansor

Türkoğlu

et al. 2012

Ekoloji

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This study, accomplished is focused on the spatial and temporal distribution and species composition of phytoplankton in the southwestern Caspian Sea between January 2008 and December 2008. Samples were collected from 11 stations along three transects known as Lisar, Anzali and Sefidrood. This study identified 43 phytoplankton species comprised of diatoms (25 species), dinoflagellates (7 species), chlorophytes (6 species), cyanophytes (4 species), and euglenoids (1 species) were identified. The study showed, diatom Dactyliosolen fragilissimus and the dinofllagelate Prorocentrum cordatum numerically dominate the southwestern Caspian Sea. The annual average phytoplankton density was calculated as 2.35E+04 ± 1.63E+04 Cell L -1 , with the maximum value recorded in the winter (4.50E+04 ± 3.90E+04 Cell L -1 ). Diatoms were dominant during the autumn and winter (77.0% and 96.0%, respectively), while dinoflagellates were prevalent during the spring and summer (89.0% and 86.0%, respectively). The annual average chlorophyll a was calculated as 9.26±3.54 μg L -1 , with the maximum values were recorded in the winter (16.9±5.60 μg L -1 ). This is supported by the Spearman rank correlation result between phytoplankton abundance and chlorophyll a (r=0.551). The high phytoplankton cell density and chlorophyll a concentration coincided with the poor species composition. Güney Batı Hazar Denizi'nde Fitoplanktonun Tür Kompozisyonu ve Bolluğu ÖzetOcak 2008 ve Aralık 2008 arasında yapılan bu çalışma Güney Batı Hazar Denizi'nde fitoplankton'un uzaysal ve zamansal dağılımları ve tür kompozisyoları üzerine odaklanmıştır. Örnekler Lisar, Anzali and Sefidrood olarak bilinen üç kesit boyunca uzanan 11 istasyon noktasından toplandı. Diatom (25 tür), dinoflagellat (7 tür), klorofit (6 tür), cyanofit (4 tür) ve euglenoidlerden (1 tür) oluşan toplam 43 fitoplankton türü tayin edildi. Çalışma, diatom Dactyliosolen fragilissimus ve dinofllagellat Prorocentrum cordatum türlerinin sayısal olarak Güney Batı Hazar Denizini kontrol ettiğini gösterdi. Yıllık ortalama fitoplankton yoğunluğu kış döneminde kaydedilen maksimum değeriyle (4,50E+04 ± 3,90E+04 Cell L -1 ) 2,35E+04 ± 1,63E+04 Cell L -1 olarak hesaplandı. Dinoflagellatlar ilkbahar ve yaz döneminde (sırasıyla %89,0 ve 86,0), diatomeler sonbahar ve kış dönemi boyunca baskın grup olmuşlardır (sırasıyla 77,0% ve 96,0). Kışın kaydedilen maksimum değeriyle (16,9 ± 5,60 μg L -1 ), yıllık ortalama klorofil a değeri 9,26 ± 3,54 μg L -1 olarak hesaplandı. Bu durum fitoplankton bolluğu ve klorofil a arasındaki Spearman rank korelasyon sonucu (r=0,551) tarafından da desteklenmiştir. Fitoplankton biyomas ve klorofil a yüksek olduğu halde, tür çeşitliliği bakımından fakir olmuştur.

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Section: Quantitative Phytoplankton Compositioncontrasting

confidence: 58%

Section: Quantitative Phytoplankton Compositionmentioning

confidence: 99%

Phytoplankton Species Composition and Abundance in the Southwestern Caspian Sea

Bagheri

Mansor

Türkoğlu

et al. 2012

Ekoloji

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“…Surveys of the surface water of the CS have recorded about 440 phytoplanktonic species, the northern basin containing the greatest diversity (Kasymov and Rogers, 1996). Surveys in the 1960s and 1970s showed that dinoflagellates composed 9% of the phytoplankton population, whereas a recent survey (2001) indicates that almost half of the population consist of dinoflagellates (Kideys et al, 2005). However, this survey, before springtime, does not indicate any occurrence of Gonyaulax species.…”

Section: Hydrobiological Settingmentioning

confidence: 60%

River inflow and salinity changes in the Caspian Sea during the last 5500 years

Leroy

Marret

Gibert

et al. 2007

Quaternary Science Reviews

119

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Pollen, spores and dinoflagellate cysts have been analysed on three sediment cores (1.8 to 1.4 m-long) taken from the south and middle basins of the Caspian Sea. A chronology available for one of the cores is based on calibrated radiocarbon dates (ca 5.5-0.8 cal. ka BP). The pollen and spores assemblages indicate fluctuations between steppe and desert. In addition there are some outstanding zones with a bias introduced by strong river inflow. The dinocyst assemblages change between slightly brackish (abundance of Pyxidinopsis psilata and Spiniferites cruciformis) and more brackish (dominance of Impagidinium caspienense) conditions. During the second part of the Holocene, important flow modifications of the Uzboy River and the Volga River as well as salinity changes of the Caspian Sea, causing sea-level fluctuations, have been reconstructed. A major change is suggested at ca 4 cal. ka BP with the end of a high level phase in the south basin. Amongst other hypotheses, this could be caused by the end of a late and abundant flow of the Uzboy River (now defunct), carrying to the Caspian Sea either meltwater from higher latitudes or water from the Amu-Daria. A similar, later clear phase of water inflow has also been observed from 2.1 to 1.7 cal. ka BP in the south basin and probably also in the north of the middle basin.

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“…In addition, the species number was found to decrease from the north (414 species) to the middle (225 species) and the southern area (71 species) mainly due to the disappearance of fresh water forms towards the south (Dumont, 1998). Recently, Kideys et al (2005; reported there was a significant increase in phytoplankton abundance and noxious visibility in the Caspian Sea. Moreover, Nasrollahzadeh et al (2008a) and Bagheri et al (2010) observed an increase in phytoplankton abundance in 2001-2002 and 2005 as compared to previous years.…”

Section: Inrtoductionmentioning

confidence: 98%

Fluctuations of Phytoplankton Community in the Coastal Waters of Caspian Sea in 2006

Bagheri¹

2011

American Journal of Applied Sciences

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Problem statement:The Caspian Sea ecosystem has been suffered with many problems since 1980s. Aanthropogenic pollution from heavy metals, hydrocarbons, pesticides, changes in the quantity of nutrient inputs by rivers, are significant threats to biodiversity and biological resources such as plankton structure in the Caspian Sea. According to the significant of phytoplankton community in marine system. The state of the fluctuations of phytoplankton communities of the southwestern Caspian Sea was investigated and compared with the findings of before 2006. Approach: Phytoplankton abundance and species composition of the Caspian Sea were evaluated by using samples collected at 12 stations along three transects. The study revealed that diatoms were higher than other groups of phytoplankton in 2006. The hydrology variation, increased fresh water inflow via rivers and a rise in nutrients concentrations have played important roles in blooming of phytoplankton species, e.g., the diatoms in this study, which is also known from other marines. Similar studies on determination of the effects of environmental degradation on phytoplankton and hydrological processes should be taken into account in near future.

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Phytoplankton distribution in the Caspian Sea during March 2001

Cited by 21 publications

References 26 publications

Phytoplankton Species Composition and Abundance in the Southwestern Caspian Sea

Phytoplankton Species Composition and Abundance in the Southwestern Caspian Sea

River inflow and salinity changes in the Caspian Sea during the last 5500 years

Fluctuations of Phytoplankton Community in the Coastal Waters of Caspian Sea in 2006

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