Premium
A comparison of internal phosphorus loads in lakes with anoxic hypolimnia: Laboratory incubation versus in situ hypolimnetic phosphorus accumulation 1
Author(s) -
Nürnberg Gertrud K.
Publication year - 1987
Publication title -
limnology and oceanography
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.7
H-Index - 197
eISSN - 1939-5590
pISSN - 0024-3590
DOI - 10.4319/lo.1987.32.5.1160
Subject(s) - hypolimnion , anoxic waters , phosphorus , environmental science , sediment , environmental chemistry , eutrophication , stratification (seeds) , hydrology (agriculture) , ecology , geology , chemistry , biology , nutrient , geomorphology , geotechnical engineering , seed dormancy , botany , germination , organic chemistry , dormancy
Phosphorus release rates from anoxic sediments were determined from laboratory incubations of minimally disturbed sediment cores from seven lakes. These release rates were multiplied by an “anoxic factor,” based on the area and duration of hypolimnetic anoxia, to estimate internal phosphorus load. Despite individual variation, the experimentally derived internal loads were not significantly different from internal loads determined from hypolimnetic phosphorus increases at the end of summer stratification, except at internal loads <50 mg m −2 yr −1 . Therefore, laboratory release rates can help predict internal loads after lake conditions have changed, e.g. after in‐lake restoration measures.