Nitrogen, phosphorus, particulate and colloidal carbon content of sedimenting seston of a hard-water lake
Book
·
OSTI ID:7307051
Sedimenting seston was collected by means of an improved sedimentation trap biweekly at 4-meter intervals for over two years in a hard-water lake of southern Michigan. Chemical analyses of the sedimenting seston indicated significant spatial and temporal changes. A marked displacement of phosphorus from the epilimnion into the metalimnion was found in mid-summer. High rates of CaCO/sub 3/ precipitation, induced by photosynthesis, from the epilimnion facilitated nutrient removal to the hypolimnion. During fall overturn an average of 0.17 ..mu..g m/sup -2/ day/sup -1/ of total phosphorus was resuspended. Total nitrogen content of the sedimenting seston changed throughout the year; a marked displacement to the hypolimnion occurred in late summer. Pronounced changes in the particulate organic carbon fraction, strongly related to primary productivity, were not as apparent as other parameters of the seston. Over one-third of the total calcium content is in the form of colloidal CaCO/sub 3/ that forms a major sink for inorganic and organic nutrients.
- OSTI ID:
- 7307051
- Report Number(s):
- COO-1599-81
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
520100* -- Environment
Aquatic-- Basic Studies-- (-1989)
54 ENVIRONMENTAL SCIENCES
ALKALINE EARTH METAL COMPOUNDS
AQUATIC ORGANISMS
CALCIUM CARBONATES
CALCIUM COMPOUNDS
CARBON
CARBON COMPOUNDS
CARBONATES
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
COLLOIDS
CRYOGENIC FLUIDS
DISPERSIONS
ELEMENTS
ENVIRONMENTAL EFFECTS
FLUIDS
LAKES
NITROGEN
NONMETALS
OXYGEN COMPOUNDS
PARTICLES
PHOSPHORUS
PHOTOCHEMICAL REACTIONS
PHOTOSYNTHESIS
PLANKTON
PRODUCTIVITY
SEASONAL VARIATIONS
SEDIMENTS
SURFACE WATERS
SYNTHESIS
VARIATIONS
Aquatic-- Basic Studies-- (-1989)
54 ENVIRONMENTAL SCIENCES
ALKALINE EARTH METAL COMPOUNDS
AQUATIC ORGANISMS
CALCIUM CARBONATES
CALCIUM COMPOUNDS
CARBON
CARBON COMPOUNDS
CARBONATES
CHEMICAL ANALYSIS
CHEMICAL REACTIONS
COLLOIDS
CRYOGENIC FLUIDS
DISPERSIONS
ELEMENTS
ENVIRONMENTAL EFFECTS
FLUIDS
LAKES
NITROGEN
NONMETALS
OXYGEN COMPOUNDS
PARTICLES
PHOSPHORUS
PHOTOCHEMICAL REACTIONS
PHOTOSYNTHESIS
PLANKTON
PRODUCTIVITY
SEASONAL VARIATIONS
SEDIMENTS
SURFACE WATERS
SYNTHESIS
VARIATIONS