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      <marc:subfield code="a">Hanna, M. C. </marc:subfield>
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      <marc:subfield code="a">Benthic macroinvertebrate community structures in Hamilton Harbour from June to August 1989 / </marc:subfield>
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      <marc:subfield code="a">Burlington, Ontario : </marc:subfield>
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      <marc:subfield code="a">Digitized edition from print [produced by Environment and Climate Change Canada].</marc:subfield>
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      <marc:subfield code="a">Includes bibliographical references (pages 22-23).</marc:subfield>
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      <marc:subfield code="a">"The benthic invertebrate communities from 13 sites along a nearshore-offshore transect on the northern shore of Hamilton Harbour were sampled 4 times between June and August 1989. Despite the significant improvement in the abundance and species composition, the benthic community still reflects eutrophic conditions in the Harbour"--Abstract, page 2.</marc:subfield>
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      <marc:subfield code="a">Canada Centre for Inland Waters.</marc:subfield>
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      <marc:subfield code="a">National Water Research Institute (Canada)</marc:subfield>
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