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Associations between land use and Perkinsus marinus infection of eastern oysters in a high salinity, partially urbanized estuary

Ecotoxicology

By:
, , , and
DOI: 10.1007/s10646-008-0279-9

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Abstract

Infection levels of eastern oysters by the unicellular pathogen Perkinsus marinus have been associated with anthropogenic influences in laboratory studies. However, these relationships have been difficult to investigate in the field because anthropogenic inputs are often associated with natural influences such as freshwater inflow, which can also affect infection levels. We addressed P. marinus-land use associations using field-collected data from Murrells Inlet, South Carolina, USA, a developed, coastal estuary with relatively minor freshwater inputs. Ten oysters from each of 30 reefs were sampled quarterly in each of 2 years. Distances to nearest urbanized land class and to nearest stormwater outfall were measured via both tidal creeks and an elaboration of Euclidean distance. As the forms of any associations between oyster infection and distance to urbanization were unknown a priori, we used data from the first and second years of the study as exploratory and confirmatory datasets, respectively. With one exception, quarterly land use associations identified using the exploratory dataset were not confirmed using the confirmatory dataset. The exception was an association between the prevalence of moderate to high infection levels in winter and decreasing distance to nearest urban land use. Given that the study design appeared adequate to detect effects inferred from the exploratory dataset, these results suggest that effects of land use gradients were largely insubstantial or were ephemeral with duration less than 3 months.

Additional Publication Details

Publication type:
Article
Publication Subtype:
Journal Article
Title:
Associations between land use and Perkinsus marinus infection of eastern oysters in a high salinity, partially urbanized estuary
Series title:
Ecotoxicology
DOI:
10.1007/s10646-008-0279-9
Volume
18
Issue:
2
Year Published:
2009
Language:
English
Publisher:
Springer
Contributing office(s):
Upper Midwest Environmental Sciences Center
Description:
11 p.
Larger Work Type:
Article
Larger Work Subtype:
Journal Article
Larger Work Title:
Ecotoxicology
First page:
259
Last page:
269
Number of Pages:
11