Abstract
It is generally believed that organic detritus constitutes a major fraction of the organic seston in natural waters. Limited data from a productive Michigan lake indicate that organic detritus ranges from 1.3 to 16.9 times the phytoplankton biomass and usually constitutes more than 50% of the seston (not including zooplankton biomass). Inorganic matter contributes a major portion of the remainder of the seston. Artificial radioactive detrius was generated in samples of surface lake water. The initial net rate of decomposition of this detritus was of the order of 10% per day varying by a factor of two among several experiments. Soluble radioactive carbon derived from aritificial detritus amounts to about 1% of the initial radioactivity after one day. This amount of organic carbon could be equal to or somewhat greater than that derived from extracellular release by phytoplankton. Radioactive detritus was also fed to natural communities of zooplankton. The results indicate that detritus might be as important as phytoplankton as a food source for Daphnia. The relative value of detritus as a food for Daphnia appears to shift with change in phytoplankton community structure. A model for carbon flow in the upperphotic zone is generated from field experiments. Manipulation of
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Citation Formats
Saunders, G W.
Transformation of artificial detritus in lake water.
Italy: N. p.,
1972.
Web.
Saunders, G W.
Transformation of artificial detritus in lake water.
Italy.
Saunders, G W.
1972.
"Transformation of artificial detritus in lake water."
Italy.
@misc{etde_6205915,
title = {Transformation of artificial detritus in lake water}
author = {Saunders, G W}
abstractNote = {It is generally believed that organic detritus constitutes a major fraction of the organic seston in natural waters. Limited data from a productive Michigan lake indicate that organic detritus ranges from 1.3 to 16.9 times the phytoplankton biomass and usually constitutes more than 50% of the seston (not including zooplankton biomass). Inorganic matter contributes a major portion of the remainder of the seston. Artificial radioactive detrius was generated in samples of surface lake water. The initial net rate of decomposition of this detritus was of the order of 10% per day varying by a factor of two among several experiments. Soluble radioactive carbon derived from aritificial detritus amounts to about 1% of the initial radioactivity after one day. This amount of organic carbon could be equal to or somewhat greater than that derived from extracellular release by phytoplankton. Radioactive detritus was also fed to natural communities of zooplankton. The results indicate that detritus might be as important as phytoplankton as a food source for Daphnia. The relative value of detritus as a food for Daphnia appears to shift with change in phytoplankton community structure. A model for carbon flow in the upperphotic zone is generated from field experiments. Manipulation of the model indicates that detritus is an energy store that is utilized at relatively slow rates and may function in a buffering capacity to energy flow in the subsystem examined.}
journal = []
volume = {29:Suppl.}
place = {Italy}
year = {1972}
month = {Jan}
}
title = {Transformation of artificial detritus in lake water}
author = {Saunders, G W}
abstractNote = {It is generally believed that organic detritus constitutes a major fraction of the organic seston in natural waters. Limited data from a productive Michigan lake indicate that organic detritus ranges from 1.3 to 16.9 times the phytoplankton biomass and usually constitutes more than 50% of the seston (not including zooplankton biomass). Inorganic matter contributes a major portion of the remainder of the seston. Artificial radioactive detrius was generated in samples of surface lake water. The initial net rate of decomposition of this detritus was of the order of 10% per day varying by a factor of two among several experiments. Soluble radioactive carbon derived from aritificial detritus amounts to about 1% of the initial radioactivity after one day. This amount of organic carbon could be equal to or somewhat greater than that derived from extracellular release by phytoplankton. Radioactive detritus was also fed to natural communities of zooplankton. The results indicate that detritus might be as important as phytoplankton as a food source for Daphnia. The relative value of detritus as a food for Daphnia appears to shift with change in phytoplankton community structure. A model for carbon flow in the upperphotic zone is generated from field experiments. Manipulation of the model indicates that detritus is an energy store that is utilized at relatively slow rates and may function in a buffering capacity to energy flow in the subsystem examined.}
journal = []
volume = {29:Suppl.}
place = {Italy}
year = {1972}
month = {Jan}
}