30.01.2013 Views

Sediment Quality in Puget Sound Year 2 - Center for Coastal ...

Sediment Quality in Puget Sound Year 2 - Center for Coastal ...

Sediment Quality in Puget Sound Year 2 - Center for Coastal ...

SHOW MORE
SHOW LESS

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

Table 9. Estimates of the spatial extent of toxicity <strong>in</strong> four <strong>in</strong>dependent tests per<strong>for</strong>med on<br />

100 sediment samples from central <strong>Puget</strong> <strong>Sound</strong>. Total study area 731.66 km2.<br />

Toxicity test/ critical value "Toxic" area (km" Percent of total area<br />

Amphipod survival<br />

Mean survival < 80% of controls 1 .O<br />

Urch<strong>in</strong> fertilization (mean fertilization<br />

< 80% of controls)<br />

100% porewater 5.1<br />

50% porewater 1.5<br />

25% porewater 4.2<br />

Microbial biolum<strong>in</strong>escence<br />

mean EC50 < 80% of controls 348.9<br />

3 7.1 pg/gD<br />

A Critical value: mean EC50 < 0.5 1 mg/ml (80% lower prediction limit (LPL) with lowest, i.e.<br />

most toxic, samples removed)<br />

B Critical value: mean EC50

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

Saved successfully!

Ooh no, something went wrong!