25.12.2012 Views

BALTIC SEAENVIRONMENT PROCEEDINGS No. 59 - Helcom

BALTIC SEAENVIRONMENT PROCEEDINGS No. 59 - Helcom

BALTIC SEAENVIRONMENT PROCEEDINGS No. 59 - Helcom

SHOW MORE
SHOW LESS

You also want an ePaper? Increase the reach of your titles

YUMPU automatically turns print PDFs into web optimized ePapers that Google loves.

Table 5. SAMPLING FREQUENCY OF BMP.<br />

Determinands Attempted<br />

frequency<br />

Hvdroaraphv<br />

Hvdrochemistrv<br />

a) long-term trend<br />

monitoring<br />

purposes<br />

b) in connection<br />

biological<br />

determinands<br />

Harmful substances<br />

a) in sea water:<br />

organochlorines<br />

PHCs<br />

Heavy metals<br />

b) in biota:<br />

Pelagic biolosv<br />

a) Baltic proper<br />

Most important<br />

period of sampling<br />

four seasons nutrients: winter time<br />

oxygen: late summer -<br />

autumn<br />

(see pelagic<br />

biology)<br />

once a year<br />

once a year<br />

once a year<br />

(see pelagic<br />

biology)<br />

none<br />

summer<br />

research needed<br />

once a year late summer - autumn<br />

12 times a year summer time, but<br />

should be sampled<br />

throughout the<br />

productive season<br />

b) other areas 6 times a year (as Baltic proper)<br />

Macrozoobenthos once a year late winter -<br />

early spring<br />

86

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!