Abstract:
:Spatiotemporal (2001-2017) characterization of sediment metal concentrations were assessed in 31 small craft harbours (SCHs) in Nova Scotia, Canada by analyzing secondary data from government sediment assessment reports. Surficial sediment samples (n = 576) were collected prior to routine maintenance or constriction dredging activities. Sediment metal concentration ranges were 0.5-62 (As), 0.05-3.8 (Cd), 1-305 (Cr), 0.5-220 (Cu), 0.003-1.85 (Hg), 0.73-583 (Pb) and 5-2300 (Zn) mg/kg (dw), respectively. Most sediment metal concentrations (>56% of samples) were below low effect level and >96% were below high effect level sediment quality guidelines, suggesting limited ecological impairment to marine biota. Despite wide temporal coverage (16 years), large variation in sediment concentrations across SCHs were likely due to regular dredging activities preventing long-term accumulation of contaminants. Spatial distribution and enrichment factor results revealed that Canso was most impacted by metals, followed by Clarks Harbour.
journal_name
Mar Pollut Bulljournal_title
Marine pollution bulletinauthors
Zhang H,Walker TR,Davis E,Ma Gdoi
10.1016/j.marpolbul.2019.02.004subject
Has Abstractpub_date
2019-03-01 00:00:00pages
493-502eissn
0025-326Xissn
1879-3363pii
S0025-326X(19)30092-Xjournal_volume
140pub_type
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