Lesson 32 Mineral Cycling - Alaska Geobotany Center

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Recalcitrant organic substances: Two-phase decomposition model of John Aber et al. (1990) Mass N-concentration • Decomposition of organic material involves easily decomposed nitrogen-rich materials (Phase 1) and recalcitrant lignin-rich material (Phase 2). Phase 1 includes about 80% of the total mass. • Data above are from a paper birch foliage decomposing in a hardwood forest at the Harvard forest LTER site. J. Aber, 1990.
Decomposition of litter material by soil invertebrates and evolution of forest mull soils Brauns 1968. Cited in Walter, H. and Breckle, S.W. 1986. Ecological Systems of the Geobiosphere. Springer-Verlag.
Page 1 and 2: Lesson 32 Mineral Cycling • Essen
Page 3 and 4: Micronutrients
Page 5 and 6: A sedimentary cycle: the phosphorus
Page 7 and 8: Hubbard Brook LTER site: whole wate
Page 9 and 10: Atmospheric inputs of nutrients and
Page 11 and 12: Calcium addition experiment at Hubb
Page 13 and 14: Soil lysimeter to collect water for
Page 15 and 16: Essential plant nutrients • Nutri
Page 17 and 18: Nutrient supply in a coastal dune c
Page 19: Soil respiration for mixed hardwood
Page 23 and 24: Greenhouse Gases Total Greenhouse G
Page 25 and 26: Monitoring Greenhouse Gas Fluxes: F
Page 27 and 28: AmeriFlux Objectives Generally: •
Page 29 and 30: FLUXNET: Integrating worldwide CO 2
Page 31 and 32: Carbon and nitrogen cycling in terr
Page 33 and 34: Litter bags and dowels for measurin
Page 35 and 36: Summary of effects of nitrogen satu
Page 37: Summary (cont ) Measurement of nutr

Lesson 32 Mineral Cycling - Alaska Geobotany Center

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