globalchange  > 过去全球变化的重建
DOI: 10.1016/j.hal.2019.101622
WOS记录号: WOS:000484873900005
论文题名:
Distributions of three Alexandrium species and their toxins across a salinity gradient suggest an increasing impact of GDA producing A. pseudogonyaulax in shallow brackish waters of Northern Europe
作者: Kremp, Anke1,2,9; Hansen, Per Juel3; Tillmann, Urban4; Savela, Henna2,5; Suikkanen, Sanna2; Voss, Daniela6; Barrera, Facundo7; Jakobsen, Hans Henrik8; Krock, Bernd4
通讯作者: Kremp, Anke
刊名: HARMFUL ALGAE
ISSN: 1568-9883
EISSN: 1878-1470
出版年: 2019
卷: 87
语种: 英语
英文关键词: Alexandrium ; A. pseudogonyaulax ; Northern Europe ; Climate warming ; Toxins ; Goniodomin A ; Cycloimines ; Paralytic shellfish toxins ; Resting cysts ; Baltic Sea
WOS关键词: OSTENFELDII DINOPHYCEAE ; MARINE DINOFLAGELLATE ; GENUS ALEXANDRIUM ; RESTING CYSTS ; LIFE-HISTORY ; TAMARENSE DINOPHYCEAE ; MEDITERRANEAN COAST ; SEASONAL DYNAMICS ; BIZERTE LAGOON ; GONIODOMIN-A
WOS学科分类: Marine & Freshwater Biology
WOS研究方向: Marine & Freshwater Biology
英文摘要:

Blooms of Alexandrium spp. are a well-known phenomenon in Northern European waters. While A. tamarense/catenella, and A. pseudogonyoular have been reported from marine waters, high densities of A. ostenfeldii are mainly observed at lower salinities in North Sea estuaries and the Baltic Sea, suggesting salinity as a driver of Alexandriwn species composition and toxin distribution. To investigate this relationship, an oceanographic expedition through a natural salinity gradient was conducted in June 2016 along the coasts of Denmark. Besides hydrographic data, phytoplankton and sediment samples were collected for analyses of Alexandrium spp. cell and cyst abundances, for toxin measurement and cell isolation. Plankton data revealed the predominance of A. pseudogonyaulax at all transect stations while A. ostenfeldii and A. catenella generally contributed a minor fraction to the Alexandriwn community. High abundances of A. pseudogonyaulax in the shallow enclosed Limfjord were accompanied by high amounts of goniodomin A (GDA). This toxin was also detected at low abundances along with A. pseudogonyaulax in the North Sea and the Kattegat. Genetic and morphological characterization of established strains showed high similarity of the Northern European population to distant geographic populations. Despite low cell abundances of A. ostenfeldii, different profiles of cycloimines were measured in the North Sea and in the Limfjord. This field survey revealed that salinity alone does not determine Alexandrium species and toxin distribution, but emphasizes the importance of habitat conditions such as proximity to seed banks, shelter, and high nutrient concentrations. The results show that A. pseudogonyaulax has become a prominent member of the Alexandrium spp. community over the past decade in the study area. Analyses of long term monitoring data from the Limfjord confirmed a recent shift to A. pseudogonyaulax dominance. Cyst and toxin records of the species in Kiel Bight suggest a spreading potential into the brackish Baltic Sea, which might lead to an expansion of blooms under future climate conditions.


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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/141451
Appears in Collections:过去全球变化的重建

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作者单位: 1.Leibniz Inst Ostseeforsch Warnemunde, Seestr 15, D-18119 Rostock, Germany
2.Finnish Environm Inst, Marine Res Ctr, Agnes Sjobergin Katu 2, Helsinki 00790, Finland
3.Univ Copenhagen, Marine Biol Sect, Strandpromenaden 5, DK-3000 Helsingor, Denmark
4.Alfred Wegener Inst Helmholtz Zentrum Polar & Mee, Handelshafen 12, D-27570 Bremerhaven, Germany
5.Univ Turku, Dept Biochem Biotechnol, Kunamyllynkatu 10, FIN-20520 Turku, Finland
6.ICBM, Schleusenstr 1, D-26382 Wilhelmshaven, Germany
7.Univ Catolica Santisima Concepcion, Ctr Invest Biodiversidad & Ambientes Sustentables, Fac Ciencias, Dept Quim Ambiental, Alonso de Ribero 2850, Concepcion 4090541, Chile
8.Aarhus Univ, Inst Biosci, Frederiksborgvej 399, DK-4000 Roskilde, Denmark
9.Leibniz Inst Ostseeforsch Wamemunde, Seestr 15, D-18119 Rostock, Germany

Recommended Citation:
Kremp, Anke,Hansen, Per Juel,Tillmann, Urban,et al. Distributions of three Alexandrium species and their toxins across a salinity gradient suggest an increasing impact of GDA producing A. pseudogonyaulax in shallow brackish waters of Northern Europe[J]. HARMFUL ALGAE,2019-01-01,87
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