INVESTIGATION ON NODULARIA ANOMALOUS ALGAL BLOOMING (AAB) IN SOUTH WEST CASPIAN SEA (2005-2006)

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MAKAREMI M.; SABKARA J.; MIRZAJANI A.R.

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Journal: JOURNAL OF BIOLOGY SCIENCE Year:2011 | Volume:5 | Issue:1 (SERIES NO. 16) Page(s): 79-94

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Title

INVESTIGATION ON NODULARIA ANOMALOUS ALGAL BLOOMING (AAB) IN SOUTH WEST CASPIAN SEA (2005-2006)

Author(s)

MAKAREMI M. | SABKARA J. | MIRZAJANI A.R. | Issue Writer Certificate

Keywords

NODULARIAQ2

ANOMALOUS ALGAL BLOOMQ2

PHYTOPLANKTONQ2

CASPIAN SEAQ3

Abstract

In September 2005, Caspian Environment Programme (CEP) received information from the department of Environment of the Gilan Province (I.R. Iran) about an unusually large Cyanobacterial bloom in coastal waters of the south-western CASPIAN SEA. This report is based on studies conducted by Iranian Fisheries Research Organization (IFRO) and it is the first report about the Cyanobacterial bloom of this size in the CASPIAN SEA. Inland Water Aquaculture Institute in Guilan based on morphological characteristics preliminary identified alga geneus responsible for the AAB as Cyanobacteria NODULARIA. This PHYTOPLANKTON bloom with affected area about 20,000 km2. The unprecedented bloom developed in the beginning of the second decade of the August and existed until the end of September. Development process was very fast – the phenomenon was first registered at the satellite image on August, 12 and reached its maximum on September, 1. Analysis of the satellite images for the same season in previous five years did not confirm that Phenomenon of such scale have ever occurred before. The thickness of the floating alga layer was estimated in tens centimeters, its biomass was huge. The risk of serious pollution of coast and coastal waters with alga decay products was very high. Fortunately changes in the weather prevented propagation of the AAB further to the shore and later on led to its destruction. It provided an idea regarding a reason (trigger) for the AAB event in Sothern CASPIAN SEA in 2005: this is warming-up of the sea surface layer above 30°C in conditions of low wind. In the first scientific cruise in 2006, at the southwestern stations in the CASPIAN SEA which recommended continuing researches since the AAB could be a new phenomenon indicating changes in the Caspian environment. A total of 41 PHYTOPLANKTON species from five phylum of Cyanophyta (9 species), Bacillariophyta (16 species), Pyrrophyta (8 species), Chlorophyta (6 species) and Euglenophyta (2 species) were identified, which the number of observed species is much lower than before. This is also true for other PHYTOPLANKTON phylum, where the variety of species has decreased in comparison with the numbers was reported in the previous studies.

Cites

ASPARTATE AMINOTRANSFERASE AND LACTATE DEHYDROGENASE CHANGES AFFECTED BY TOXIC ALGAE NODULARIA SPUMIGENA IN CASPIAN SEA SALMON (SALMO TRUTTA CASPIUS)

References

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APA: Copy

MAKAREMI, M., SABKARA, J., & MIRZAJANI, A.R.. (2011). INVESTIGATION ON NODULARIA ANOMALOUS ALGAL BLOOMING (AAB) IN SOUTH WEST CASPIAN SEA (2005-2006). JOURNAL OF BIOLOGY SCIENCE, 5(1 (SERIES NO. 16)), 79-94. SID. https://sid.ir/paper/164234/en

Vancouver: Copy

MAKAREMI M., SABKARA J., MIRZAJANI A.R.. INVESTIGATION ON NODULARIA ANOMALOUS ALGAL BLOOMING (AAB) IN SOUTH WEST CASPIAN SEA (2005-2006). JOURNAL OF BIOLOGY SCIENCE[Internet]. 2011;5(1 (SERIES NO. 16)):79-94. Available from: https://sid.ir/paper/164234/en

IEEE: Copy

M. MAKAREMI, J. SABKARA, and A.R. MIRZAJANI, “INVESTIGATION ON NODULARIA ANOMALOUS ALGAL BLOOMING (AAB) IN SOUTH WEST CASPIAN SEA (2005-2006),” JOURNAL OF BIOLOGY SCIENCE, vol. 5, no. 1 (SERIES NO. 16), pp. 79–94, 2011, [Online]. Available: https://sid.ir/paper/164234/en

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