Abstract
Lowest species diversities and specimen abundance correlate with a shallow O2 minimum zone at 150-400m where dissolved O2 values are less than 1 ml/l. The most dramatic faunal change across the entire shelf-edge-to-abyssal gradient occurs at the base of this low O2 parcel between 400 and 500m, where 35 species have their shallowest or deepest occurrences. Low diversity and abundances also characterize a deep O2-minimum zone at 900-1700m. Alternately, highest species diversities and abundances are found at depths shallower than 150m and at 400-900m correlating with surface and intermediate oxygen maxima and associated salinity minima. A sharp increase in the relative abundance and diversity of agglutinated species at c3500m correlates with the CaCO3 lysocline. -from Authors
Original language | English (US) |
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Pages (from-to) | 113-150 |
Number of pages | 38 |
Journal | Micropaleontology |
Volume | 26 |
Issue number | 2 |
DOIs | |
State | Published - 1980 |
All Science Journal Classification (ASJC) codes
- Palaeontology