Abstract:
:Quantitative analyses of soft bottom invertebrate fauna from four Norwegian sill fjords show increased macrofaunal abundance, species richness, and a considerably changed benthic deep water macrofaunal composition in the inner parts of the fjord system. In retrospect, the analyses show significantly altered benthic macrofaunal community structure that was not reflected by the changes in the Shannon-Wiener diversity indices during regular monitoring. The observed changes are mainly due to an increased abundance of opportunistic species, especially of the polychaete Polydora sp. during the last 10-15 years which is correlated significantly to declining dissolved oxygen, rising temperature in the bottom water and increasing total organic matter in the sediment. Possible anthropogenic and climatic impact factors related to the observed macrofaunal changes and environmental consequences of the changes are discussed.
journal_name
Mar Pollut Bulljournal_title
Marine pollution bulletinauthors
Johansen PO,Isaksen TE,Bye-Ingebrigtsen E,Haave M,Dahlgren TG,Kvalø SE,Greenacre M,Durand D,Rapp HTdoi
10.1016/j.marpolbul.2018.01.063subject
Has Abstractpub_date
2018-03-01 00:00:00pages
483-495eissn
0025-326Xissn
1879-3363pii
S0025-326X(18)30074-2journal_volume
128pub_type
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