Controls over nutrient flow through plants and microbes in Arctic tundra

Technical Report · Tue Jan 01 00:00:00 EST 1991

OSTI ID:5392985

Chapin, III, F S

During 1990, we worked primarily on two major projects. The first was a field study of {sup 15}N partitioning between plants and microbes at Imnavait Creek. {sup 15}N was absorbed faster on the tundra than in temperate climates, and release of labeled nitrogen occurs much more slowly, indicating a slow turnover. The second major project was a model of nutrient uptake by {und Eriophorum vaginatum}. The major effort for 1991 will be on continued model development to match model predictions with results of current field work. Also scheduled for 1991 is completion of field work with {und E. vaginatum} and related soils. This should provide validation of the applicability of R4D concepts to anthropogenic disturbances in tundra. 5 figs. (MHB)

• Research Organization: California Univ., Berkeley, CA (United States). Dept. of Integrative Biology
• Sponsoring Organization: USDOE; USDOE, Washington, DC (United States)
• DOE Contract Number: FG03-90ER61032
• OSTI ID: 5392985
• Report Number(s): DOE/ER/61032-T1; ON: DE91017405
• Country of Publication: United States
• Language: English

Related Subjects

59 BASIC BIOLOGICAL SCIENCES
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
54 ENVIRONMENTAL SCIENCES
PLANT GROWTH
MATHEMATICAL MODELS
TUNDRA
BIOLOGICAL RECOVERY
NITROGEN CYCLE
BIOCHEMICAL REACTION KINETICS
MICROORGANISMS
NITROGEN 15
PARAMETRIC ANALYSIS
PHOSPHORUS
PLANTS
PROGRESS REPORT
ROOT ABSORPTION
SENSITIVITY ANALYSIS
SOIL CHEMISTRY
TRACER TECHNIQUES
VALIDATION
ABSORPTION
CHEMISTRY
DOCUMENT TYPES
ELEMENTS
GROWTH
ISOTOPE APPLICATIONS
ISOTOPES
KINETICS
LIGHT NUCLEI
NITROGEN ISOTOPES
NONMETALS
NUCLEI
ODD-EVEN NUCLEI
REACTION KINETICS
RECOVERY
STABLE ISOTOPES
TESTING
UPTAKE
550501* - Metabolism- Tracer Techniques
550200 - Biochemistry
990200 - Mathematics & Computers
540210 - Environment
Terrestrial- Basic Studies- (1990-)