Cyst and radionucleotide evidence for the recent introduction of the toxic dinoflagellate Gymnodinium catenatum into Tasmanian waters

被引:64
作者
McMinn, A
Hallegraeff, GM
Thomson, P
Jenkinson, AV
Heijnis, H
机构
[1] Univ Tasmania, Inst Antarctic & So Ocean Studies, Hobart, Tas 7001, Australia
[2] Univ Tasmania, Dept Plant Sci, Hobart, Tas 7001, Australia
[3] Australian Nucl Sci & Technol Org, Environm Radiochem Lab, Menai, NSW 2234, Australia
关键词
Gymnodinium catenatum; sediment cysts; ballast water introduction; radiometric dating;
D O I
10.3354/meps161165
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
Cysts of the dinoflagellate Gymnodinium catenatum were present only in the top sections of duplicate marine sediment cores from Deep Bay in southern Tasmania, Australia. Pb-210 and Cs-137 analyses indicate that the appearance of the cyst of this toxic dinoflagellate (one of the causative organisms of paralytic shellfish poisoning) occurred after 1972. This sediment core evidence and the absence of this species from the phytoplankton of most other neighbouring Australian waters suggest that Gymnodinium catenatum is not endemic to Tasmania but has been introduced recently. This species was first seen in bloom proportions in Tasmania in 1980, with major blooms having occurred since then in 1986, 1991 and 1993. Several lines of evidence suggest that, ballast water discharge from cargo vessels originating from Japan and South Korea, or less likely Europe, is the most probable mechanism of introduction.
引用
收藏
页码:165 / 172
页数:8
相关论文
共 38 条