Factors controlling decomposition in arctic tundra and related root mycorrhizal processes

• Main Author: Linkins, A.E.
• Language: unknown
• Published: 2021
• Subjects: 59 BASIC BIOLOGICAL SCIENCES; ARCTIC REGIONS; RESEARCH PROGRAMS; CELLULOSE; ENZYMATIC HYDROLYSIS; ORGANIC NITROGEN COMPOUNDS; DECOMPOSITION; PLANT GROWTH; BIOLOGICAL MODELS; ROOT ABSORPTION; CARBON DIOXIDE; CELLULASE; CELLULOLYTIC ACTIVITY; METHANE; MICROCOSMS; MYCORRHIZAS; ORGANIC MATTER; PHOSPHATASES; PROGRESS REPORT; ROOTS; SOILS; TUNDRA; ABSORPTION; ALKANES; CARBOHYDRATES; CARBON COMPOUNDS; CARBON OXIDES; CHALCOGENIDES; CHEMICAL REACTIONS; DOCUMENT TYPES; ENZYME ACTIVITY; ENZYMES; ESTERASES; GLYCOSYL HYDROLASES; GROWTH; HYDROCARBONS; HYDROLASES; HYDROLYSIS; LYSIS; O-GLYCOSYL HYDROLASES; ORGANIC COMPOUNDS; OXIDES; OXYGEN COMPOUNDS; POLAR REGIONS; POLYSACCHARIDES; SACCHARIDES; SOLVOLYSIS; UPTAKE; Arctic; Tundra
• Online Access: http://www.osti.gov/servlets/purl/6949359; https://www.osti.gov/biblio/6949359; https://doi.org/10.2172/6949359

Work proposed for the final year of Phase 1 of the R D Program will focus on three areas: (1) acquire soil and root-mycorrhizal process data which will incorporate baseline enzymatic and soil respiration data, as has been collected during the duration of the project, into the manipulations in the project initiated by Drs. Chapin and Schimmel. Additional enzymatic data on a broader range of organic nitrogen compound decomposition will be collected to better integrate existing decomposition data and modeling structure with the expanded information to be collected on nitrogen dynamics in soils and plant compartments. This activity will principally be done in the new dust disturbance experiment the overall project has planned. (2) Finalize data sets on the complete mineralization of cellulose, and cellulose like plant structural material, and cellulose intermediate hydrolysis products into CO2 and CH4 from soils from water track and non-water track soils and soils from riparian sedge moss meadow vegetation areas. Gas efflux from these soils will be measured in closed microcosms in which the soils will be manipulated to alter their redox state. (3) Continue developing and testing the GAS models on decomposition and plant growth and nutrient acquisition. The primary activity of this project will be on this latter task. 22 refs.