| Autor: |
Kankaanpää HT; Finnish Institute of Marine Research, Helsinki, Finland. kankaanpaa@fimr.fi, Sjövall O, Huttunen M, Olin M, Karlsson K, Hyvärinen K, Sneitz L, Härkönen J, Sipiä VO, Meriluoto JA |
| Jazyk: |
angličtina |
| Zdroj: |
Environmental pollution (Barking, Essex : 1987) [Environ Pollut] 2009 Apr; Vol. 157 (4), pp. 1301-9. Date of Electronic Publication: 2008 Dec 30. |
| DOI: |
10.1016/j.envpol.2008.11.044 |
| Abstrakt: |
This seven-year survey was primarily targeted to quantification of production of nodularin-R (NOD-R), a cyclic pentapeptide hepatotoxin, in Baltic Sea cyanobacteria waterblooms. Additionally, NOD-R and microcystin-LR (MC-LR; a cyclic heptapeptide toxin) sedimentation rates and NOD-R sediment storage were estimated. NOD-R production (70-2450 microg m(-3); approximately 1 kg km(-2) per season) and sedimentation rates (particles; 0.03-5.7 microg m(-2)d(-1); approximately 0.3kg km(-2) per season) were highly variable over space and time. Cell numbers of Nodularia spumigena did not correlate with NOD-R quantities. Dissolved NOD-R comprised 57-100% of total NOD-R in the predominantly senescent, low-intensity phytoplankton blooms and seston. Unprecedentedly intensive MC-LR sedimentation (0.56 microg m(-2)d(-1)) occurred in 2004. Hepatotoxin sedimentation rates highly exceeded those of anthropogenic xenobiotics. NOD-R storage in surficial sediments was 0.4-20 microg kg(-1) ( approximately 0.1 kg km(-2)). Loss of NOD-R within the chain consisting of phytoplankton, seston and soft sediments seemed very effective. |
| Databáze: |
MEDLINE |
| Externí odkaz: |
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