Spring bloom of the raphidophycean Heterosigma akashiwo in the Golden Horn Estuary at the northeast of Sea of Marmara
In the period of February-May 2012, harmful algal blooms (HABs) along with environmental factors were investigated biweekly in the Golden Horn Estuary at the northeast of the Sea of Marmara and a dense bloom of the raphidophyceaen Heterosigma akashiwo (Y.Hada) Y.Hada ex Y.Hara & M.Chihara wa...
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Ege University
2016-08-01
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Online Access: | https://dergipark.org.tr/tr/pub/egejfas/issue/24394/258596 |
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doaj-56a284b647404e81975b601074812d8e2021-04-01T09:32:44ZengEge UniversitySu Ürünleri Dergisi2148-31402016-08-0133320120710.12714/egejfas.2016.33.3.0352Spring bloom of the raphidophycean Heterosigma akashiwo in the Golden Horn Estuary at the northeast of Sea of MarmaraFuat DursunSeyfettin TaşTufan KorayIn the period of February-May 2012, harmful algal blooms (HABs) along with environmental factors were investigated biweekly in the Golden Horn Estuary at the northeast of the Sea of Marmara and a dense bloom of the raphidophyceaen Heterosigma akashiwo (Y.Hada) Y.Hada ex Y.Hara & M.Chihara was observed in late May. H. akashiwo abundance increased gradually from the lower estuary to the upper estuary. The dense bloom of H. akashiwo in late May occurred at the temperature of 20.2°C and salinity of 16.4 psu and its abundance reached to 10.4×106 cells L-1. When compared to mid-May, the mean temperature of surface water increased 4.50°C, while salinity decreased 2.30 psu in late May. Secchi depth values decreased rapidly from the lower to the upper estuary (6.00 m to 0.50 m). It is considered that a rapid increase in temperature, a decrease in salinity, and high nutrient concentrations in combination with low water circulation at the upper estuary were the causes of the bloom of H. akashiwo. Fish mortality or other harmful effects in environment were not observed during the H. akashiwo bloom. But, these events may create a potentially toxic risk for the study area in the future.Keywords: Golden Horn Estuary, Harmful algal blooms, Heterosigma akashiwo, nutrients, Sea of Marmarahttps://dergipark.org.tr/tr/pub/egejfas/issue/24394/258596besin elementleri haliç heterosigma akashiwo marmara denizi zararlı alg aşırı üremeleri |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Fuat Dursun Seyfettin Taş Tufan Koray |
spellingShingle |
Fuat Dursun Seyfettin Taş Tufan Koray Spring bloom of the raphidophycean Heterosigma akashiwo in the Golden Horn Estuary at the northeast of Sea of Marmara Su Ürünleri Dergisi besin elementleri haliç heterosigma akashiwo marmara denizi zararlı alg aşırı üremeleri |
author_facet |
Fuat Dursun Seyfettin Taş Tufan Koray |
author_sort |
Fuat Dursun |
title |
Spring bloom of the raphidophycean Heterosigma akashiwo in the Golden Horn Estuary at the northeast of Sea of Marmara |
title_short |
Spring bloom of the raphidophycean Heterosigma akashiwo in the Golden Horn Estuary at the northeast of Sea of Marmara |
title_full |
Spring bloom of the raphidophycean Heterosigma akashiwo in the Golden Horn Estuary at the northeast of Sea of Marmara |
title_fullStr |
Spring bloom of the raphidophycean Heterosigma akashiwo in the Golden Horn Estuary at the northeast of Sea of Marmara |
title_full_unstemmed |
Spring bloom of the raphidophycean Heterosigma akashiwo in the Golden Horn Estuary at the northeast of Sea of Marmara |
title_sort |
spring bloom of the raphidophycean heterosigma akashiwo in the golden horn estuary at the northeast of sea of marmara |
publisher |
Ege University |
series |
Su Ürünleri Dergisi |
issn |
2148-3140 |
publishDate |
2016-08-01 |
description |
In the period of February-May 2012, harmful algal blooms (HABs) along with environmental factors were investigated biweekly in the Golden Horn Estuary at the northeast of the Sea of Marmara and a dense bloom of the raphidophyceaen Heterosigma akashiwo (Y.Hada) Y.Hada ex Y.Hara & M.Chihara was observed in late May. H. akashiwo abundance increased gradually from the lower estuary to the upper estuary. The dense bloom of H. akashiwo in late May occurred at the temperature of 20.2°C and salinity of 16.4 psu and its abundance reached to 10.4×106 cells L-1. When compared to mid-May, the mean temperature of surface water increased 4.50°C, while salinity decreased 2.30 psu in late May. Secchi depth values decreased rapidly from the lower to the upper estuary (6.00 m to 0.50 m). It is considered that a rapid increase in temperature, a decrease in salinity, and high nutrient concentrations in combination with low water circulation at the upper estuary were the causes of the bloom of H. akashiwo. Fish mortality or other harmful effects in environment were not observed during the H. akashiwo bloom. But, these events may create a potentially toxic risk for the study area in the future.Keywords: Golden Horn Estuary, Harmful algal blooms, Heterosigma akashiwo, nutrients, Sea of Marmara |
topic |
besin elementleri haliç heterosigma akashiwo marmara denizi zararlı alg aşırı üremeleri |
url |
https://dergipark.org.tr/tr/pub/egejfas/issue/24394/258596 |
work_keys_str_mv |
AT fuatdursun springbloomoftheraphidophyceanheterosigmaakashiwointhegoldenhornestuaryatthenortheastofseaofmarmara AT seyfettintas springbloomoftheraphidophyceanheterosigmaakashiwointhegoldenhornestuaryatthenortheastofseaofmarmara AT tufankoray springbloomoftheraphidophyceanheterosigmaakashiwointhegoldenhornestuaryatthenortheastofseaofmarmara |
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1724176262426001408 |