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Seasonal changes of (137)Cs in benthic plants from the southern Baltic Sea.

Zalewska T - J Radioanal Nucl Chem (2011)

Bottom Line: The measurements showed considerable seasonality of (137)Cs activity in both species; an increase of cesium concentrations was observed from spring to autumn with maximal levels 49.1 ± 1.4 Bq kgd.w. (-1) (P. fucoides) and 14.5 ± 1.0 Bq kgd.w. (-1) (Z. marina) in late autumn. (137)Cs concentrations observed in a given season are the result of a number of processes, the intensity of which can differ depending on external environmental conditions.The effects of these processes can differ and their directions can frequently be opposite to one another.The examined macrophytobenthic plant species could serve as bioindicators of radionuclide pollution for monitoring purposes on condition that the samples of plants are taken within a strictly defined period of the year to give comparable results and to supply realistic information about pollution levels.

View Article: PubMed Central - PubMed

Affiliation: Institute of Meteorology and Water Management, National Research Institute, Maritime Branch, Waszyngtona 42, 81-342 Gdynia, Poland.

ABSTRACT

(137)Cs activity concentrations were determined in samples of macrophytes Polysiphonia fucoides (red algae) and Zostera marina (vascular plant) collected during the entire vegetation season in the Gulf of Gdańsk in the southern Baltic Sea. The measurements showed considerable seasonality of (137)Cs activity in both species; an increase of cesium concentrations was observed from spring to autumn with maximal levels 49.1 ± 1.4 Bq kgd.w. (-1) (P. fucoides) and 14.5 ± 1.0 Bq kgd.w. (-1) (Z. marina) in late autumn. (137)Cs concentrations observed in a given season are the result of a number of processes, the intensity of which can differ depending on external environmental conditions. The effects of these processes can differ and their directions can frequently be opposite to one another. The examined macrophytobenthic plant species could serve as bioindicators of radionuclide pollution for monitoring purposes on condition that the samples of plants are taken within a strictly defined period of the year to give comparable results and to supply realistic information about pollution levels.

No MeSH data available.


Related in: MedlinePlus

Vertical distribution of temperature, at Kępa Redłowska, Gulf of Gdańsk
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Fig5: Vertical distribution of temperature, at Kępa Redłowska, Gulf of Gdańsk

Mentions: Radionuclide concentrations observed in the studied benthic plants were related solely to the plant morphology and physiology, those having close relation to environmental conditions like temperature and sunlight, and not to the changes of 137Cs in seawater. Spatial distribution of 137Cs in the Gulf of Gdańsk, examined at four locations showed a homogenous pattern of radionuclide concentrations (Fig. 4). No significant differences were noted between 2008 and 2009, either. Monitoring measurements (in 2006 and 2007) of seawater temperature and salinity in the area close to the macrophyte sampling region showed strong seasonality in the surface seawater temperature changes (Fig. 3). Simultaneously, temperature remained quite uniform in the water column on given dates (Fig. 5). Salinity remained stable along the vertical profile (Fig. 6) and showed minor seasonal response (Fig. 3). The uniform vertical distribution of temperature and salinity provide evidence for the strong mixing trough waves and advection, in the examined area and hence imply that 137Cs concentrations will be uniform down the water column profile.Fig. 4


Seasonal changes of (137)Cs in benthic plants from the southern Baltic Sea.

Zalewska T - J Radioanal Nucl Chem (2011)

Vertical distribution of temperature, at Kępa Redłowska, Gulf of Gdańsk
© Copyright Policy
Related In: Results  -  Collection

Show All Figures
getmorefigures.php?uid=PMC4514633&req=5

Fig5: Vertical distribution of temperature, at Kępa Redłowska, Gulf of Gdańsk
Mentions: Radionuclide concentrations observed in the studied benthic plants were related solely to the plant morphology and physiology, those having close relation to environmental conditions like temperature and sunlight, and not to the changes of 137Cs in seawater. Spatial distribution of 137Cs in the Gulf of Gdańsk, examined at four locations showed a homogenous pattern of radionuclide concentrations (Fig. 4). No significant differences were noted between 2008 and 2009, either. Monitoring measurements (in 2006 and 2007) of seawater temperature and salinity in the area close to the macrophyte sampling region showed strong seasonality in the surface seawater temperature changes (Fig. 3). Simultaneously, temperature remained quite uniform in the water column on given dates (Fig. 5). Salinity remained stable along the vertical profile (Fig. 6) and showed minor seasonal response (Fig. 3). The uniform vertical distribution of temperature and salinity provide evidence for the strong mixing trough waves and advection, in the examined area and hence imply that 137Cs concentrations will be uniform down the water column profile.Fig. 4

Bottom Line: The measurements showed considerable seasonality of (137)Cs activity in both species; an increase of cesium concentrations was observed from spring to autumn with maximal levels 49.1 ± 1.4 Bq kgd.w. (-1) (P. fucoides) and 14.5 ± 1.0 Bq kgd.w. (-1) (Z. marina) in late autumn. (137)Cs concentrations observed in a given season are the result of a number of processes, the intensity of which can differ depending on external environmental conditions.The effects of these processes can differ and their directions can frequently be opposite to one another.The examined macrophytobenthic plant species could serve as bioindicators of radionuclide pollution for monitoring purposes on condition that the samples of plants are taken within a strictly defined period of the year to give comparable results and to supply realistic information about pollution levels.

View Article: PubMed Central - PubMed

Affiliation: Institute of Meteorology and Water Management, National Research Institute, Maritime Branch, Waszyngtona 42, 81-342 Gdynia, Poland.

ABSTRACT

(137)Cs activity concentrations were determined in samples of macrophytes Polysiphonia fucoides (red algae) and Zostera marina (vascular plant) collected during the entire vegetation season in the Gulf of Gdańsk in the southern Baltic Sea. The measurements showed considerable seasonality of (137)Cs activity in both species; an increase of cesium concentrations was observed from spring to autumn with maximal levels 49.1 ± 1.4 Bq kgd.w. (-1) (P. fucoides) and 14.5 ± 1.0 Bq kgd.w. (-1) (Z. marina) in late autumn. (137)Cs concentrations observed in a given season are the result of a number of processes, the intensity of which can differ depending on external environmental conditions. The effects of these processes can differ and their directions can frequently be opposite to one another. The examined macrophytobenthic plant species could serve as bioindicators of radionuclide pollution for monitoring purposes on condition that the samples of plants are taken within a strictly defined period of the year to give comparable results and to supply realistic information about pollution levels.

No MeSH data available.


Related in: MedlinePlus