Tim Moore

Professor
Dept. of Geography
McGill University 
Room 626, Burnside Hall 
805 Sherbrooke St. W. 
Montreal, QC, H3A 2K6 
Tel: (514) 398-4961 
Fax:(514) 398-7437 

e-mail: tim.moore@mcgill.ca

Research Interests:

My interests lie in the relationships between soil and the environment, particularly the regulation of fluxes of gases, nutrients and elements between the soil and the atmosphere, the biosphere and the hydrosphere and the effect of human activities and climate change.

For the past decade, most of my attention has focused on peatlands and wetlands and the controls on the cycling of carbon in these systems. Northern peatlands contain one third of the global soil carbon pool, store carbon dioxide (CO2) in accumulating peat, emit methane (CH4) to the atmosphere and are major sources of dissolved organic carbon (DOC). My work, in landscapes ranging from the Northwest Territories to Nova Scotia, has attempted to measure the magnitude of these fluxes, to establish the important controls, to develop models and to examine the effect of changes, such as directly anthropogenic (for example, through the drainage or flooding of peatlands) or indirectly (for example, through climatic change and atmospheric nitrogen deposition) on carbon cycling. Thus, my work integrates aspects of atmospheric chemistry, plant ecology, hydrology, microbiology and soil science in a search to understand biogeochemical patterns in the landscape.

Research opportunities for 2008

Dynamics and chemistry of dissolved organic carbon (DOC) in peatlands: Although we know the concentration of DOC in peat porewater and can estimate export of DOC from a peatland, we have little understanding on the rates of DOC production, consumption and transport within peatlands. This study will be based at Mere Bleue and involve both field work and laboratory experiments to determine where the DOC comes from and how it is processed by the column.

Nitrogen fixation in peatlands: Peatlands store substantial amounts of nitrogen (N) along with carbon (C); the main input of N to peatlands is from the atmosphere or through N2 fixation, but little is know about the latter process. This project will examine the rates of N2 fixation at the range of sites (hummock-hollow-beaver pond-fertilized plots) at Mer Bleue using the acetylene reduction method, and establish the major controls on these N2 fixation rates.

Sources of N uptake by bog plants: N uptake by plants has been assumed to be primarily as NH₄ and NO₃, but it has been shown that in several terrestrial ecosystems, varying from to boreal forest to tundra, plants may access organic forms of N. In peat porewater, dissolved organic N (DON) dominates the forms of N: at MB, ~80% of the TDN is DON, with ~15% NH₄ and ~5% NO₃ Thus, the important question arises of whether peatland plants, such as at MB, have the capacity to uptake organic N and I am unaware of any study addressing this issue in peatlands. This study will test whether peatland plants have the capacity to take up organic forms of N by growing the major Mer Bleue and exposed to inorganic NH₄ and NO₃ and organic N (the amino acids alanine and glycine) in which there is both δ¹³C and δ¹⁵N labeling. Roots, leaves and mosses analyzed for δ¹³C and δ¹⁵N will establish the N uptake pathways.

Root dynamics in peatlands
Below-ground activities in ecosystems are the ‘Final Frontier’ (Science [2004] 304: 1614-1637) and this is probably particularly the case in wetlands. We have established gradients of species composition and production at Mer Bleue in response to water table position - above:belowground quotients range from 0.3 to 0.6. Mini-rhizotron tubes inserted to the rooting depth along a hummock-hollow sequence and in the fertilizer plots will measure root demographics at monthly intervals.

Response of a bog community to N and P additions
Bogs are oligotrophic and ombrotrophic systems, with low nutrient availability and are being exposed to increased nutrient inputs, especially increases in atmospheric N deposition. To determine the long-term effect of increased nutrient additions, in 2000 I established a study at Mer Bleue with triplicated plots 3 x 3 m with treatments representing 0, 1.6, 3.2, and 6.4 g N m^-2 y^-1, or 5, 10, and 20 times the growing-season N deposition and about 2, 4 and 8 times the annual deposition. Opportunities are available to establish the response of plant species and their C exchange, of nutrient uptake and release and of ecosystem  CO2, CH4 and N2O exchange.

Research Themes

Peatland biogeochemistry

Mer Bleue is the eastern peatland within the Fluxnet Canada program ( http://www.fluxnet-canada.ca ) (Figures 1 to 5). At this site, an eddy covariance tower operated by Peter Lafleur of Trent University, has measured CO2 exchange over the last 7 years (e.g. Lafleur et al. 2003), providing an assessment of the interannual variability and the influence of changes in climate. My work at Mer Bleue, in collaboration with Jill Bubier of Mount Holyoke College, MA, has involved studies of rates of decomposition of litter and peat (e.g. Scanlon and Moore 2000; Moore et al. in press), of biomass and plant production and distribution (e.g. Moore et al. 2002; Bubier et al. 2006), of CO 2 exchange from chambers covering the range of vegetation types from bog to beaver pond (e.g. Bubier et al. 2003) and controls on ecosystem respiration (Lafleur et al. 2006) and the onset of spring photosynthesis in this system (Moore et al. 2006). To evaluate the effect of nutrients on the bog, we are conducting a long-term (10-year +) fertilization with N, P and K, and determining plant and CO2 flux response: vegetation (Fig. 6) and CO2 exchange changes have been observed among the 6 experimental treatments (Bubier et al. 2007).

Focus is now being placed on linking the C and N cycles, involving measurements of microbial activities (Basiliko et al. 2005), of 15N in vegetation and peat, incubation studies of rates of NH4+, NO3- and dissolved organic nitrogen production (M.Sc. student Michael Rubinstein) and nitrogen fixation. Ph.D. student Meaghan Murphy is determining below-ground activities at the Mer Bleue site. From 2004 to 2007, CH 4 flux was determined from a range of sites within the bog. Christian Blodau ( University of Bayreuth , Germany ) continues his detailed process-oriented studies of biogeochemistry (e.g. Blodau & Moore 2003, Blodau et al. 2002). Mike Billett (Centre for Ecology and Hydrology, Penicuik , Scotland ) and I observed very high concentrations and fluxes of CO2 and CH4 emission from open water surfaces at Mer Bleue (Billett and Moore in press) and University of Edinburgh Ph.D. student Kerry Dinsmore is continuing these analyses.

As part of a broad study of the C dynamics of peatlands in the James Bay region, in collaboration with Nigel Roulet, Jukka Turunen (currently Geologic Survey of Finland, Kuopio), Michelle Garneau (UQAM) and Pierre Richard (Université de Montréal), M.Sc. student Luc Pelletier has measured CO2 and CH4 fluxes from peatlands and small pools Pelletier et al. 2007) and Ph.D. student Nicola McEnroe is examining the biogeochemistry of pools in these northern peatlands. The objective is to determine current fluxes, to relate these to rates of C accumulation and fluxes in the past and to model what would happen under climate change scenarios.

Sampling of ombrotrophic bogs from northwestern Ontario to the Maritimes and their dating with 210 Pb has provided an assessment of recent rates of accumulation of C in peat and the influence of climate and atmospheric N deposition. It appears that elevated atmospheric N deposition increases C accumulation rates (Turunen et al. 2004). We have also determined recent rates of N and S accumulation and related them to atmospheric deposition patterns (Moore et al. 2005). The cores have been analyzed for poly-aromatic hydrocarbons (Christian Blodau and Anna Dryer, University of Bayreuth) and the cores are being analysed for Hg (with Brian Branfireun, University of Toronto), to broaden the record of atmospheric deposition patterns in eastern Canada.

Methane and nitrous oxide fluxes from Canadian forests

We have a three-year project to measure and model the exchange of methane and nitrous oxide between forest soils and the atmosphere. This work, supported by CFCAS and BIOCAP, involves Fluxnet sites as well as those at Turkey Point , ON and selected sites in eastern Canada . The work is being undertaken by post-doctoral Research Associate Sami Ullah, in collaboration with Dan Pennock ( University of Saskatchewan ), Altaf Arain ( McMaster University ) and Changhui Peng (UQAM).

Dissolved organic carbon (DOC) in forests

We are engaged in a three-year study of the role of DOC in C cycling within upland forests, supported by BIOCAP and NSERC. This study involves measurements of field fluxes, laboratory experiments of DOC production, biodegradability, sorption and chemistry and modelling (Ph.D. students Julie Turgeon and Dolly Kothawala). We have determined DOC fluxes, and their controls, at a white pine chronosequence in Turkey Point , ON (Peichle et al. 2007) and at Douglas fir sites on Vancouver Island .

Litter decomposition and ecological stoichiometry

Work on litter decomposition includes the CIDET (Canadian Intersite Decomposition Experiment) in which 12 litter types are being decomposed in litter-bags at 20 upland forest and 3 wetland sites across Canada , over a 12 year period. Patterns of decomposition rates and their climatic and tissue controls over 6 years have been published (Moore et al. 1999; Trofymow et al. 2002) and we have shown the same influences on the release of N and P (Moore et al. 2006). Comparison of decomposition rates in three pairs of upland and adjacent peatlands in central Canada failed to show any strong differences in C, N and P changes over the first 6 years, suggesting that the later stages of decomposition are the critical period for differentiation (Moore et al. 2004). Publication of the results after 12 years of decomposition is now being undertaken.

Restored peatlands

Near Rivière du Loup (QC) and Shippagan (NB), we have examined the effect of drainage and harvesting of peat moss on the C cycle and whether vegetation restoration practices can bring back the peat to C cycling function similar to that before the peat was disturbed (Figures 5 to 8). Post-doctoral Fellow Stephan Glatzel (currently Ass. Prof. University of Rostock, Germany) showed the variation in CO2 and CH4 production potentials of peats at these sites (Glatzel et al. 2004), and the patterns of porewater DOC and influence on CO 2 emission rates (Glatzel et al. 2003). M.Sc. student Michele Marinier determined the influence of cotton-grass on CO 2 and CH 4 fluxes (Marinier et al. 2004). We are currently preparing a manuscript examining changes in gas fluxes from natural peatlands through drainage and harvesting to restoration. M.Sc. student Julian Cleary (currently PhD student, University of Toronto ) performed a C life-cycle analysis of the Sphagnum-peat industry in Canada (Cleary et al. 2005). Ph.D. student Nate Basiliko (currently Ass. Prof., University of Toronto ) determined the potential of peat natural, harvested and restored to exchange CH4 and CO2 and the controls on these potentials (Basiliko et al. in press).

Soil carbon and land-use change

I have become involved in broader issues of carbon sequestration in soils, particularly land-use change. In Sardinilla , Panama , a large old pasture has been converted to a native tree plantation by Catherine Potvin (Biology, McGill) in collaboration with the Smithsonian Tropical Research Institute (Figure 9) (Potvin et al. 2004, Wilsey et al. 2002). M.Sc. student Muriel Abraham determined the pattern of soil characteristics using geo-statistical techniques for the surface layers (0-10 cm) as well as the soil profile. Analyses include pH, bulk density, C and N content and mass and 13C signature. Comparison was made with continuously forested soils on Barro Colorado Island . The trees were planted in 2000 and a re-sampling of soils (planned for May, 2008) and comparison with the archived original samples will provide a well-controlled study of the changes brought about by the land-use change. The results will serve as an inventory upon which the change in soil properties associated with the plantation can be followed.

 
Member of Global Environmental and Climate Change Centre

Associate Editor, Journal of Geophysical Research - Biogeosciences

Associate Editor, EcoScience

Editorial Advisory Board, Global Change Biology

GEOG-203 Environmental Systems

GEOG-305 Soils and Environment

GEOG-505 Global Biogeochemistry

• Robinson, Stephen. 1999. Peatland C Accumulation, Fort Simpson , N.W.T. Ph.D. Thesis.
• Branfireun , Marnie. 2000. Methylmercury Dynamics in Decomposing Plant Tissues in a Bog. M.Sc. Thesis.
• Blodau, Christian. 2002. Geochemical Controls on Carbon Oxidation and CH4 production in Peatland Soils. Ph.D. Thesis.
• Isernhagen , Birgit. 2002. CO2 and CH4 Exchange in a Drained Beaver Pond. M.Sc. Thesis.
• Cleary, Julian. 2003. A Life-Cycle Perspective of the Carbon Cycle in the Canadian Peat Moss Industry. M.Sc . Thesis (co-supervised with N. Roulet ).
• Marinier, Michele. 2003. The Effect of Cotton-grass ( Eriophorum spissum ) on C Cycling in Restored Bogs, Eastern Canada. M.Sc. Thesis.
• Abraham, Muriel. 2004. Soil Properties in a Tropical Pasture undergoing Land Use Change. M.Sc. Thesis.
• Basiliko, Nate. 2004. The Effect of Nitrogen Deposition and Drainage/Restoration on Peatland Microbial Community Structure. Ph.D. Thesis.
• Pelletier, Luc. 2005. Methane and Carbon Dioxide Emissions from Peatlands, James Bay Region. M.Sc. Thesis.
• Turgeon, Julie. 2008. Dissolved Organic Carbon Production and Biodegradation in Canadian Forests. Ph.D. thesis.
• Chong, Mandy. in prep. Microclimatic and Trace Gas Flux Changes in Fertilized Peatlands. M.Sc. Thesis.
• Kothawala, Dolly. in prep. Controls on the Sorption of Dissolved Organic Carbon in Canadian Forests. Ph.D. thesis.
• Lai, Derrick. in prep. Carbon cycling in peatlands. Ph.D. thesis. (co-supervised with N. Roulet ).
• Nicola McEnroe. in prep. Carbon Cycling in Pools, La Grande Peatlands. Ph.D. thesis. (co-supervised with N. Roulet ).
• Murphy, Meaghan. in prep. Below-ground C Cycling in a Temperate Bog. Ph.D. thesis.

Dinsmore, K., M. Billett & T.R. Moore in press. Transfer of carbon dioxide and methane through the soil-water-atmosphere system at Mer Bleue peatland, Canada. Hydrol. Proc.

Kothawala, D.N., T.R. Moore & W.H. Hendershot 2008. Adsorption of dissolved organic carbon to mineral soils: A comparison of four isotherm approaches. Geoderma 148: 43-50.

McEnroe, N., N.T. Roulet & T.R. Moore in press. Do pool surface area and depth control CO2 and CH4 fluxes from an ombrotrophic raised bog, James Bay, Canada? JGR-Biogeosciences.

Moore, T.R., D. Paré, & R. Boutin 2008. Production of dissolved organic carbon in Canadian forest soils. Ecosystems 11: 740-751.

Moore, T.R., A.J. Trofymow, M. Siltanen and L.M. Korz 2008. Litter decomposition and N and P dynamics in peatland and upland sites over 12 years in central Canada. Oecologia 157: 317-325.

Ullah, S., R. Frasier, L. King, N. Picotte-Anderson and T.R. Moore 2008. Potential fluxes of N2O and CH4 from soils of three forest types in eastern Canada. Soil Biology and Biochemistry 40: 986-994.

Moore, T.R., J.L. Bubier and L.A. Bledzki 2007. Litter decomposition in temperate peatlands: the effect of substrate and site. Ecosystems 10: 949-963.

Basiliko, N., C. Blodau, P. Bengtson, C. Roehm and T.R. Moore 2007. Regulation of microbial greenhouse gas fluxes across natural, commercially-mined, and restored northern peatlands. Ecosystems 10: 1148-1165.

Potvin, C. & 17 others 2007. A participatory approach to the establishment of a baseline scenario for a reforestation CDM project. Mitigation and Adaptation of Strategies for Global Change 12: 1341-1362.

Basiliko, N., C. Blodau, P. Bengtson, C. Roehm & T.R. Moore in press. Regulation of microbial greenhouse gas fluxes across natural, commercially-mined, and restored northern peatlands. Ecosystems .

Billett, M.F. & T.R. Moore in press. Supersaturation and evasion of CO 2 and CH 4 in surface waters at Mer Bleue peatland, Canada . Hydrological Processes.

Moore , T.R., J.L. Bubier & L.A. Bledzki in press. Litter decomposition in temperate peatlands: the effect of substrate and site. Ecosystems .

Peichl, M., T.R. Moore, A. Arain, M. Dalva, D. Brodkey & J. McLaren 2007. Dissolved organic carbon in a white pine plantation sequence, southern Ontario . Biogeochemistry 86: 1-17 .

Potvin, C. & 17 others in press. A participatory approach to the establishment of a baseline scenario for a reforestation CDM project. Mitigation and Adaptation of Strategies for Global Change .

Wieder, K., J. Canadell, J. Limpens, T. Moore, N. Roulet & G. Schaepman-Strub 2007. Peatlands and the Carbon Cycle - From Local Processes to Global Implications. First International Symposium on Carbon in Peatlands, Wageningen, the Netherlands , 15-18 April, 2007. EOS, Transactions American Geophysical Union 88: 295.

Blodau, C., B. Mayer, S. Peiffer & T.R. Moore 2007. Support for an anaerobic sulfur cycle in two Canadian peatland soils. JGR-Biogeosciences 112:G02004, doi: 10.1029/2006JG000364.

Blodau, C., N.T. Roulet, T. Heitmann, H. Stewart, J. Beer, P. Lafleur and T.R. Moore 2007. Belowground carbon turnover in a temperate ombrotrophic bog. Global Biogeochemical Cycles  21: doi: GB1021 10.1029/2005GB002659.

Bubier, J.L., T.R. Moore & L.A. Bledzki 2007. Effects of nutrient addition on vegetation and carbon cycling in an ombrotrophic bog. Global Change Biology 13: 1168-1186.

Moore , T.R. and B.R. Clarkson 2007. Dissolved organic carbon in New Zealand peatlands. New Zealand Journal of Freshwater and Marine Research 41: 137-141.

Pelletier, L., T.R. Moore, N.T. Roulet, M. Garneau and V. Beaulieu-Audy 2007. Methane fluxes from three peatlands in the La Grande Rivière watershed, James Bay lowland, Canada . JGR-Biogeosciences 112: G01018, doi:10.1029/2006JG000216.

Roulet N.T., P.M. Lafleur, P.J.H. Richard, T.R. Moore, E.R. Humphreys and J. Bubier 2007. Contemporary carbon balance and late Holocene carbon accumulation in a northern peatland. Global Change Biology 13: 397-411.

Basiliko, N., J.L. Bubier, R. Jeannotte and T.R. Moore 2006. The effect of nutrient input on carbon and microbial dynamics in an ombrotrophic bog. Geomicrobiology 23: 531-543.

Blodau, C., N. Basiliko, B. Mayer and T.R. Moore 2006. The fate of experimentally deposited nitrogen in mesocosms from two Canadian peatlands. Science of the Total Environment 364: 215-228.

Bubier, J., T.R. Moore and G. Crosby 2006. Fine-scale vegetation distribution in a cool temperate bog. Canadian Journal of Botany 84: 910-923.

Moore, T. and N. Basiliko 2006. Decomposition. Pages 126-143 in R.K. Wieder & D.H. Vitt (eds.) Boreal Peatland Ecosystems , Ecological Studies Vol. 188, Springer-Verlag.

Moore, T.R., A.J. Trofymow, C.E. Prescott, J. Fyles, B.D. Titus & CIDET Working Group 2006. Patterns of C, N and P dynamics in decomposing foliar litter in Canadian forests. Ecosystems 9: 46-62.

Moore , T.R., P.M. Lafleur, D.M.I. Poon, B.W. Heumann, J.W. Seaquist and N.T. Roulet 2006. Spring photosynthesis in a cool temperate bog. Global Change Biology 12: 2323-2335.

Roulet, N. and T.R. Moore 2006 . News and Views - Environmental chemistry : Browning the waters. Nature 444: 283-4.

Wironen, M. and T.R. Moore 2006. Exotic earthworm invasion of an old-growth forest in southern Quebec and effects on soil carbon and nitrogen. Canadian Journal of Forest Research 36: 845-854.

Basiliko, N., T.R. Moore, P.M. Lafleur and N.T. Roulet 2005. Seasonal and inter-annual decomposition, microbial biomass, and nitrogen dynamics in a Canadian bog. Soil Sci. 170: 902-912.

Cleary, J., N. Roulet and T.R. Moore 2005. Greenhouse gas emissions from Canadian peat extraction, 1990-2000: A life-cycle analysis. Ambio 34: 456-461.

Lafleur, P., T.R. Moore, N. Roulet and S. Frolking 2005. Ecosystem respiration in a cool temperate bog: dependency on peat temperature and moisture content. Ecosystems 8: 619-629.

Bubier, J., T. Moore, K. Savage and P. Crill 2005. A comparison of methane flux in a boreal landscape between a dry and a wet year. Global Biogeochemical Cycles 19 # doi 10.1029/2004GB002351.

Moore , T.R., A.J. Trofymow, M. Siltanen, C. Prescott and CIDET Working Group 2005. Litter decomposition and carbon, nitrogen and phosphorus dynamics in upland forest and peatland sites, central Canada . Canadian Journal of Forest Research 35: 133-142.

Basiliko, N., R. Knowles and T.R. Moore 2004 . On the roles of moss species and habitat in methane oxidation in northern peatlands. Wetlands 24: 178-185.

Blodau, C., N. Basiliko and T.R. Moore 2004. Carbon turnover in peatland mesocosms exposed to different water table levels. Biogeochemistry 67: 331-351.

Glatzel, S., N. Basiliko and T.R. Moore 2004. CO 2 and CH 4 production potentials of peats from natural, harvested and restored sites, eastern Québec , Canada . Wetlands 24: 261-267.

Marinier, M., S. Glatzel and T.R. Moore 2004 . The role of cotton-grass ( Eriophorum vaginatum ) in CO 2 and CH 4 fluxes from restored peatlands, eastern Canada . Écoscience 11: 141-149.

Moore , T.R., C. Blodau, J. Turunen, J., N.T. Roulet and P.J.H. Richard 2004. Recent rates of N and S accumulation in peatlands, eastern Canada . Global Change Biology 11: 356-367.

Moore , T.R. and J. Turunen 2004. Subsoil accumulation of carbon beneath forest and peat in Michigan . Soil Science Society of America Journal 68: 690-696 .

Potvin, C., E. Whidden and T.R. Moore 2004. A case study of carbon pools under three different land-uses in Panamá. Climatic Change 67: 291-307.

Turunen, J., N. Roulet, T.R. Moore and P. Richard 2004. Nitrogen deposition and increased carbon accumulation in ombrotrophic peatlands in eastern Canada . Global Biogeochemical Cycles 18 # 3, doi 10.1029/2003GB002154.

Blodau, C. and T.R. Moore 2003 . Microscale CO 2 and CH 4 dynamics in a peat soil during a water table fluctuation and sulfate pulse. Soil Biology and Biochemistry 35: 535-547.

Blodau, C. and T.R. Moore 2003. Experimental response of peatland carbon dynamics to a water table fluctuation. Aquatic Sciences 65: 47-62.

Bubier, J.L., G. Bhatia, T.R. Moore, N.T. Roulet and P.M. Lafleur 2003. Inter-annual and inter-site variability in net ecosystem CO 2 exchange controlled by respiration at a large peatland in southern Ontario , Canada . Ecosystems 6: 353-367 (doi 10.1007/S10021-003-0125-0).

Glatzel, S., K. Kalbitz, M. Dalva, and T. Moore 2003. Dissolved organic matter properties and their relationship to carbon dioxide efflux from restored peat bogs. Geoderma 113 : 397-411.

Kraenzel, M., A. Castill, T. Moore and C. Potvin 2003. Carbon storage of harvest-age teak ( Tectona grandis ) plantations, Panama . Forest Ecology and Management 173: 213-225.

Lafleur, P.M., N.T. Roulet, J.L. Bubier, and T.R. Moore 2003. Interannual variability in the peatland-atmosphere carbon dioxide exchange at an ombrotrophic bog. Global Biogeochemical Cycles 17 #2 doi 10.1029/2002GB001983.

Moore, T.R. 2003. Dissolved organic carbon in a northern boreal landscape. Global Biogeochemical Cycles 17 #4 doi 10.1029/2003GB002050.

Moore , T.R., L. Matos and N.T. Roulet 2003. Dynamics and chemistry of dissolved organic carbon in Precambrian Shield catchments and an impounded wetland. Canadian Journal of Fisheries and Aquatic Sciences 60: 612-623.

Turunen, J. and T.R. Moore 2003. Controls on C accumulation in the mineral subsoil beneath peat in Lakkasuo mire, central Finland . European Journal of Soil Science 54: 279-286.

Blodau, C., C.L. Roehm and T.R. Moore 2002. Iron, sulphur and dissolved organic carbon dynamics in northern peatland. Archives Hydrobiologia 154: 561-583.

Blodau, C. and T.R. Moore 2002. Macro-porosity affects water movement and pore water sampling in peatland mesocosms. Soil Science 167: 98-109.

Clair, T.A., P. Arp, T.R. Moore, M. Dalva and F-R. Meng 2002. Gaseous carbon dioxide and methane, and dissolved organic carbon losses from a small temperate wetland under a changing climate. Environmental Pollution 116: S143-148.

Frolking, S., N.T. Roulet, T.R. Moore, P.M. Lafleur, J.L. Bubier and P.M. Crill 2002. Modeling the seasonal to annual carbon balance of Mer Bleue Bog, Ontario , Canada . Global Biogeochemical Cycles 16 doi 10.1029/2001GB0011457.

Moore, T., J. Bubier, P. Lafleur, S. Frolking and N. Roulet 2002. Plant biomass, production and CO 2 exchange in an ombrotrophic bog. Journal of Ecology 90: 25-36.

Trofymow, A.J., T.R. Moore and CIDET Working Group 2002. Rates of litter decomposition after six years in Canadian forests: Influence of litter quality and climate. Canadian Journal of Forest Research 32: 789-804.

Wilsey, B., G. Parent, N.T. Roulet, T.R. Moore and C. Potvin 2002. Tropical pasture carbon cycling: relationships between C source/sink strength, above-ground biomass and grazing. Ecological Letters 5: 367-376 .

Dalva, M. P. Arp, T.R. Moore and T.A. Clair 2001. Methane and carbon dioxide emissions from wetlands, Kejimkujik National Park , Nova Scotia : measurements, predictions and climatic change. Journal of Geophysical Research 106: 2955-1962.

Fraser, C., N. Roulet and T. Moore 2001. Hydrology and dissolved organic carbon biogeochemistry in an ombrotrophic bog. Hydrological Processes 15: 3151-3166.

Frolking, S., N.T. Roulet, T.R. Moore, P.J.H. Richard, M. Lavoie and S.D. Muller 2001. Modeling northern peatland decomposition and peat accumulation. Ecosystems 4: 479-498.

Moore , T.R. and M. Dalva 2001. Some controls on the production of dissolved organic carbon in soils. Soil Science 166: 38-47.

Moore, T.R. 2001. Les processus biogéochimiques liés au carbone. Pp. 183-197 en " Écologie des Tourbières du Québec-Labrador " ed. par S. Payette et L. Rochefort, Les Presses de l'Université Laval.