Cross‐biome transplants of plant litter show decomposition models extend to a broader climatic range but lose predictability at the decadal time scale

Global Change Biology - Tập 16 Số 6 - Trang 1744-1761 - 2010
William S. Currie1, Mark E. Harmon2, Ingrid C. Burke3, Stephen C. Hart4, W. J. Parton5, Whendee L. Silver6
1School of Natural Resources and Environment, University of Michigan, 440 Church St., Ann Arbor, MI 48109 USA
2Department of Forest Sciences, Oregon State University, Corvallis OR 97331 USA
3Department of Forest, Rangeland and Forest Stewardship, Colorado State University, Fort Collins, CO 80523 USA
4School of Forestry and Merriam-Powell Center for Environmental Research, Northern Arizona University, POB 15018, Flagstaff, AZ 86011-5018 USA
5Natural Resource Ecology Laboratory, Colorado State University, Fort Collins, CO 80523, USA
6Ecosystem Sciences Division, Department of Environmental Science, Policy, and Management, University of California, Berkeley, CA, USA

Tóm tắt

AbstractWe analyzed results from 10‐year long field incubations of foliar and fine root litter from the Long‐term Intersite Decomposition Experiment Team (LIDET) study. We tested whether a variety of climate and litter quality variables could be used to develop regression models of decomposition parameters across wide ranges in litter quality and climate and whether these models changed over short to long time periods. Six genera of foliar and three genera of root litters were studied with a 10‐fold range in the ratio of acid unhydrolyzable fraction (AUF, or ‘lignin’) to N. Litter was incubated at 27 field sites across numerous terrestrial biomes including arctic and alpine tundra, temperate and tropical forests, grasslands and warm deserts. We used three separate mathematical models of first‐order (exponential) decomposition, emphasizing either the first year or the entire decade. One model included the proportion of relatively stable material as an asymptote. For short‐term (first‐year) decomposition, nonlinear regressions of exponential or power function form were obtained with r2 values of 0.82 and 0.64 for foliar and fine‐root litter, respectively, across all biomes included. AUF and AUF : N ratio were the most explanative litter quality variables, while the combined temperature‐moisture terms AET (actual evapotranspiration) and CDI (climatic decomposition index) were best for climatic effects. Regressions contained some systematic bias for grasslands and arctic and boreal sites, but not for humid tropical forests or temperate deciduous and coniferous forests. The ability of the regression approach to fit climate‐driven decomposition models of the 10‐year field results was dramatically reduced from the ability to capture drivers of short‐term decomposition. Future work will require conceptual and methodological improvements to investigate processes controlling decadal‐scale litter decomposition, including the formation of a relatively stable fraction and its subsequent decomposition.

Từ khóa


Tài liệu tham khảo

10.1139/b82-277

10.1139/b90-287

10.1111/j.1365-2486.2008.01674.x

10.2307/3546886

Allen RG, 1998, Crop Evapotranspiration – Guidelines for Computing Crop Water Requirements

10.1046/j.1365-2745.2000.00437.x

10.1007/s00442-004-1519-1

10.1016/S0169-5347(98)01451-7

10.1080/02827588609382428

10.1007/BF00000785

10.1139/b84-345

10.1139/x00-044

Berg B, 1981, Leaching, accumulation and release of nitrogen in decomposing forest litter, Ecological Bulletin (Sweden), 33, 163

10.1007/s10533-005-5632-y

10.1016/0038-0717(85)90062-8

Cromack K, 1975, Mineral Cycling in Southeastern Ecosystems

10.1890/0012-9658(1997)078[1844:MLAADP]2.0.CO;2

10.2136/sssaj2004.1320

De Haan S, 1977, Organic Matter Studies, 21

10.1007/s10533-004-0898-z

10.1021/ac60111a017

Effland MJ, 1977, Modified procedure to determine acid‐insoluble lignin in wood and pulp, Tappi, 60, 143

10.1046/j.1365-2486.2000.00349.x

10.1016/0048-9697(94)90549-5

10.1007/BF01013897

10.1111/j.1365-2486.2008.01837.x

HartSC(1990)Control of decomposition processes and nutrient flow in a California forest and grassland. PhD Dissertation University of California Berkeley USA.

Haslam E, 1989, Plant Polyphenols: Vegetable Tannins Revisited

10.1016/0169-5347(92)90126-V

10.1007/s00442-004-1556-9

Kurcheva GF, 1960, The role of invertebrates in the decomposition of oak litter, Pedology (Leningrad), 4, 16

10.1046/j.1365-2486.2003.00605.x

McClaugherty CA, 1983, Soluble polyphenols and carbohydrates in throughfall and leaf litter decomposition, Acta Oecologia/Oecologia Generalis, 4, 375

10.2307/1941327

10.1139/x91-232

10.1139/x91-233

10.2307/1936576

10.1080/02827588609382409

10.1007/BF02202587

10.1046/j.1365-2486.1998.00224.x

10.1029/1998GB900014

10.1016/0076-6879(88)61003-2

10.2307/1932179

Parton WJ, 1994, Quantitative Modeling of Soil Forming Processes, 137

10.1126/science.1134853

10.1139/b00-101

10.1139/b97-872

10.2307/1938919

10.1139/x90-023

Tappi. (1976) Alcohol‐benzene and dichloromethane solubles in wood and pulp. Tappi Official Standard T204.

Tappi.(1981) Water solubility of wood and pulp. Tappi Official Standard T207.

10.2307/1938416

10.2307/1934129

10.1139/x01-117

Van Breemen N, 1998, Plant‐soil interactions, Biogeochemistry, 42, 1, 10.1023/A:1005996009413

10.1139/x88-002

10.1038/nrg1877

Witkamp M, 1966, The role of arthropods and microflora in breakdown of white oak litter, Pedobiologia, 6, 292, 10.1016/S0031-4056(22)00211-6

10.2307/3564969

Thông tin
Thông tin xuất bản

Global Change Biology

Tập 16 Số 6

1744-1761

Thông tin tác giả