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Title: A test of the hierarchical model of litter decomposition

Journal Article · · Nature Ecology and Evolution
ORCiD logo [1]; ORCiD logo [2];  [3];  [2]; ORCiD logo [4];  [5];  [6]; ORCiD logo [7];  [8]; ORCiD logo [9];  [2];  [10];  [11];  [5];  [12];  [13]; ORCiD logo [14];  [15];  [16]
  1. Yale Univ., New Haven, CT (United States); Netherlands Inst. of Ecology, Wageningen, (Netherlands)
  2. Netherlands Inst. of Ecology, Wageningen, (Netherlands)
  3. Univ. of Rennes 1, Rennes Cedex (France)
  4. Univ. of Vermont, Burlington, VT (United States); Univ. of Copenhagen, Copenhagen (Denmark)
  5. Vrije Univ., Amsterdam (Netherlands)
  6. Federal Inst. of Technology, Zurich (Switzerland)
  7. Univ. of Manchester, Manchester (United Kingdom)
  8. Univ. Montpellier, Montpellier (France)
  9. Umeå Univ., Umeå (Sweden)
  10. Yale Univ., New Haven, CT (United States)
  11. Univ. of Vermont, Burlington, VT (United States); Copenhagen Univ., Copenhagen (Denmark)
  12. Swedish Univ. of Agricultural Sciences, Uppsala, (Sweden).
  13. Umeå Univ., Umeå (Sweden); Nanyang Technological Univ., Singapore (Singapore)
  14. National Center for Atmospheric Research, Boulder, CO (United States)
  15. The Nature Conservancy, Arlington, VA (United States)
  16. Netherlands Inst. of Ecology, Wageningen, (Netherlands); Wageningen Univ., Wageningen (Netherlands)

Our basic understanding of plant litter decomposition informs the assumptions underlying widely applied soil biogeochemical models, including those embedded in Earth system models. Confidence in projected carbon cycle–climate feedbacks therefore depends on accurate knowledge about the controls regulating the rate at which plant biomass is decomposed into products such as CO2. Here we test underlying assumptions of the dominant conceptual model of litter decomposition. The model posits that a primary control on the rate of decomposition at regional to global scales is climate (temperature and moisture), with the con- trolling effects of decomposers negligible at such broad spatial scales. Using a regional-scale litter decomposition experiment at six sites spanning from northern Sweden to southern France—and capturing both within and among site variation in putative controls—we find that contrary to predictions from the hierarchical model, decomposer (microbial) biomass strongly regulates decomposition at regional scales. Furthermore, the size of the microbial biomass dictates the absolute change in decomposition rates with changing climate variables. Our findings suggest the need for revision of the hierarchical model, with decomposers acting as both local- and broad-scale controls on litter decomposition rates, necessitating their explicit consideration in global biogeochemical models.

Research Organization:
Univ. of Tennessee, Knoxville, TN (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
SC0010562
OSTI ID:
1501394
Journal Information:
Nature Ecology and Evolution, Vol. 1, Issue 12; ISSN 2397-334X
Publisher:
Nature Publishing GroupCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 140 works
Citation information provided by
Web of Science

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Cited By (35)

Altered leaf litter quality exacerbates the negative impact of climate change on decomposition journal April 2019
Data from: A test of the hierarchical model of litter decomposition dataset January 2018
Global patterns in fine root decomposition: climate, chemistry, mycorrhizal association and woodiness journal March 2019
Global distribution of earthworm diversity journal October 2019
Decomposition responses to climate depend on microbial community composition journal November 2018
Consistent trade-offs in fungal trait expression across broad spatial scales journal February 2019
Resource‐ratio theory predicts mycorrhizal control of litter decomposition journal May 2019
Nutrient scarcity strengthens soil fauna control over leaf litter decomposition in tropical rainforests journal September 2019
Boreal tree species affect soil organic matter composition and saprotrophic mineralization rates journal May 2019
Cross-biome patterns in soil microbial respiration predictable from evolutionary theory on thermal adaptation journal January 2019
Litter carbon and nutrient chemistry control the magnitude of soil priming effect journal January 2019
Assessing the temporal dynamics of aquatic and terrestrial litter decomposition in an alpine forest journal June 2018
The Role of Plant Litter in Driving Plant-Soil Feedbacks journal October 2019
Leveraging Environmental Research and Observation Networks to Advance Soil Carbon Science journal May 2019
Multiple models and experiments underscore large uncertainty in soil carbon dynamics journal October 2018
Larger plants promote a greater diversity of symbiotic nitrogen-fixing soil bacteria associated with an Australian endemic legume: XXXX journal October 2018
The global soil community and its influence on biogeochemistry journal August 2019
Effects of termites growth on litter decomposition: a modeling approach journal November 2019
Soil microbial respiration adapts to ambient temperature in global drylands journal January 2019
Accurate forest projections require long‐term wood decay experiments because plant trait effects change through time journal November 2019
Warming reverses top-down effects of predators on belowground ecosystem function in Arctic tundra journal July 2018
Soil microbial biomass increases along elevational gradients in the tropics and subtropics but not elsewhere journal October 2019
Invasive lianas are drivers of and passengers to altered soil nutrient availability in urban forests journal November 2019
Microsite conditions influence leaf litter decomposition in sugar maple bioclimatic domain of Quebec journal September 2019
Wood decomposition is more strongly controlled by temperature than by tree species and decomposer diversity in highly species rich subtropical forests journal November 2018
Microbial decomposers not constrained by climate history along a Mediterranean climate gradient in southern California journal June 2018
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Effects of initial microbial biomass abundance on respiration during pine litter decomposition journal February 2020
Relationships between plant diversity and soil microbial diversity vary across taxonomic groups and spatial scales journal January 2020
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