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First record of a Trichodesmium erythraeum bloom in the Mediterranean Sea

First record of a Trichodesmium erythraeum bloom in the Mediterranean Sea
First record of a Trichodesmium erythraeum bloom in the Mediterranean Sea
Trichodesmium erythraeum is a species of marine cyanobacteria that forms extensive blooms in tropical and subtropical areas, predominantly in the Indian and Pacific oceans. An extensive bloom of this species, identified by microscopic and molecular analysis, is recorded for the first time at latitude greater than 30°N in Lesvos Island, Aegean Sea, eastern Mediterranean. Analysis of climatological trends revealed that the September 2010 bloom followed an extended period of the highest sea surface temperature and lowest wind speed observed since 1955, leading to a shallow thermocline formation. These conditions are considered among the main prerequisites for T. erythraeum bloom development. Analysis of abiotic parameters showed that other important factors for Trichodesmium proliferations, such as iron availability, oligotrophic conditions, and salinity levels, typical for the eastern Mediterranean, were also favourable. These findings seem directly linked to climate change already reported for the Mediterranean Sea and provide further evidence of the “tropicalization” of the area. Expansion of Trichodesmium blooms to greater latitudes may have important regional and global implications potentially affecting the global nitrogen cycle, the biological carbon pump, productivity levels, and harmful algal bloom frequency.
0706-652X
1444-1455
Spatharis, Sofie
0dde8517-ab91-4060-b26a-6c6ef22f1411
Skliris, Nikolaos
07af7484-2e14-49aa-9cd3-1979ea9b064e
Meziti, Alexandra
3b55172e-3720-4638-a682-cd0609b09755
Kormas, Konstantinos Ar.
65de9769-1aca-46c1-b220-1faa1a269660
Weyhenmeyer, Gesa
75658854-9250-43c5-8a2f-94158be117a4
Spatharis, Sofie
0dde8517-ab91-4060-b26a-6c6ef22f1411
Skliris, Nikolaos
07af7484-2e14-49aa-9cd3-1979ea9b064e
Meziti, Alexandra
3b55172e-3720-4638-a682-cd0609b09755
Kormas, Konstantinos Ar.
65de9769-1aca-46c1-b220-1faa1a269660
Weyhenmeyer, Gesa
75658854-9250-43c5-8a2f-94158be117a4

Spatharis, Sofie, Skliris, Nikolaos, Meziti, Alexandra, Kormas, Konstantinos Ar. and Weyhenmeyer, Gesa (2012) First record of a Trichodesmium erythraeum bloom in the Mediterranean Sea. Canadian Journal of Fisheries and Aquatic Sciences, 69 (8), 1444-1455. (doi:10.1139/F2012-020).

Record type: Article

Abstract

Trichodesmium erythraeum is a species of marine cyanobacteria that forms extensive blooms in tropical and subtropical areas, predominantly in the Indian and Pacific oceans. An extensive bloom of this species, identified by microscopic and molecular analysis, is recorded for the first time at latitude greater than 30°N in Lesvos Island, Aegean Sea, eastern Mediterranean. Analysis of climatological trends revealed that the September 2010 bloom followed an extended period of the highest sea surface temperature and lowest wind speed observed since 1955, leading to a shallow thermocline formation. These conditions are considered among the main prerequisites for T. erythraeum bloom development. Analysis of abiotic parameters showed that other important factors for Trichodesmium proliferations, such as iron availability, oligotrophic conditions, and salinity levels, typical for the eastern Mediterranean, were also favourable. These findings seem directly linked to climate change already reported for the Mediterranean Sea and provide further evidence of the “tropicalization” of the area. Expansion of Trichodesmium blooms to greater latitudes may have important regional and global implications potentially affecting the global nitrogen cycle, the biological carbon pump, productivity levels, and harmful algal bloom frequency.

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More information

Published date: 2012
Organisations: Physical Oceanography

Identifiers

Local EPrints ID: 365227
URI: https://eprints.soton.ac.uk/id/eprint/365227
ISSN: 0706-652X
PURE UUID: 8167cfbb-5b56-4f3c-b3e2-93db0daf31c1

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Date deposited: 28 May 2014 10:30
Last modified: 16 Jul 2019 21:04

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