1
|
Treby S, Grover SP. Carbon emissions from Australian Sphagnum peatlands increase with feral horse (Equus caballus) presence. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2023; 347:119034. [PMID: 37832263 DOI: 10.1016/j.jenvman.2023.119034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2023] [Revised: 09/08/2023] [Accepted: 09/17/2023] [Indexed: 10/15/2023]
Abstract
Peatlands are globally significant carbon sinks, but when disturbed, have the potential to release carbon back to the atmosphere as greenhouse gases. Feral horse populations in the Australian Alps degrade Sphagnum peatlands, which are highly sensitive to disturbance. However, the link between this degradation and peatland carbon cycling is not understood. Here, we compared the autumn daytime carbon dioxide (CO2) and methane (CH4) fluxes of 12 alpine and subalpine Sphagnum peatlands in Kosciuszko National Park, Australia. The presence of feral horses at these sites was correlated with higher carbon loss: sites with horses were losing carbon to the atmosphere (4.83 and 8.18 g CO2-e m-2 d-1 in areas of Sphagnum moss and bare soil, respectively), whereas sites without horses were removing carbon from the atmosphere (-6.39 g CO2-e m-2 d-1). Sites with feral horses also had higher soil bulk density, temperature, and electrical conductivity (EC), and higher water pH, EC, and turbidity, than sites without horses. Our findings suggest that excluding feral horses from peatland areas could reduce rates of carbon loss to the atmosphere, in addition to improving overall site condition, peat soil condition, and water quality. We discuss potential management applications, further research, and restoration opportunities arising from these results.
Collapse
Affiliation(s)
- Sarah Treby
- Applied Chemistry and Environmental Science, RMIT University, GPO Box 2476, Melbourne, 3001, Australia.
| | - Samantha P Grover
- Applied Chemistry and Environmental Science, RMIT University, GPO Box 2476, Melbourne, 3001, Australia
| |
Collapse
|
2
|
Kravchenko E, Wang YC, Ni JJ. Effects of phase change material inclusion on reducing greenhouse gas emissions from soil in cold region. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:102839-102852. [PMID: 37674066 DOI: 10.1007/s11356-023-29675-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/11/2023] [Accepted: 08/30/2023] [Indexed: 09/08/2023]
Abstract
Increased gas emissions from soil into the atmosphere are one form of ecosystem feedback in response to climate change. Soil temperature plays a critical role in the soil emission of carbon dioxide (CO2) and nitrous oxide (N2O) suggesting that the release of gases can be reduced by regulating soil temperature. This study proposes a green microencapsulated phase-change material (mPCM) as a soil temperature regulator due to its ability to absorb and release heat during temperature phase transition. The objective is to test how mPCM in soil mixtures influences CO2 and N2O fluxes under laboratory-controlled conditions. For this purpose, a series of soil incubations were carried out with different temperature regimes and soil moisture. The test results revealed that at 20% soil moisture mPCM reduced cumulative CO2 emissions from the soil by 16.4% during the thawing stage and by 20.5% during the freezing stage. At 25% soil moisture, mPCM showed a greater effect reducing cumulative CO2 emissions by 23.9% during the thawing stage and by 24.2% during the freezing stage. At below-zero temperatures, mPCM reduced the total N2O flux by 11.6% at 20% soil moisture and by 26.0% at 25% soil moisture, compared to soil without mPCM. As soil moisture increased, the effects of mPCM on CO2 and N2O fluxes became more pronounced. Cyclic freezing and thawing of soil led to an increase in gas flux. This variation was reduced by the mPCM due to its ability to mitigate the change of soil temperature. Inhibition of the rise in soil temperature due to the inclusion of mPCM reduced the rate of activation of soil mineralization, which reduced gas fluxes. This study demonstrates the potential of mPCM application to reduce greenhouse gas emissions from soil through thermoregulation.
Collapse
Affiliation(s)
- Ekaterina Kravchenko
- Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong.
| | - Yu Chen Wang
- Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Hong Kong
| | - Jun Jun Ni
- School of Transportation, Southeast University, Nanjing, China
| |
Collapse
|
3
|
Wang Y, Paul SM, Jocher M, Espic C, Alewell C, Szidat S, Leifeld J. Soil carbon loss from drained agricultural peatland after coverage with mineral soil. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 800:149498. [PMID: 34426363 DOI: 10.1016/j.scitotenv.2021.149498] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/07/2021] [Revised: 07/15/2021] [Accepted: 08/02/2021] [Indexed: 06/13/2023]
Abstract
Drainage for agriculture has turned peatlands from a net sink to a net source of carbon (C). In order to reduce the environmental footprint of agricultural peatland drainage, and to counteract soil subsidence, mineral soil coverage is becoming an increasingly used practice in Switzerland. To explore the effect of mineral soil coverage on soil C loss and the source of CO2 from peatland drained for agriculture, we utilized the radiocarbon signature (F14C) of soil C and emitted CO2 in the field. The experiment, located in the Swiss Rhine Valley, was carried out on two adjacent drained organic soils, either without mineral soil cover (reference 'Ref'), or covered with mineral soil (thickness ~ 40 cm) (coverage 'Cov') 13 years ago. Drainage already commenced 130 years ago and the site was managed as meadow since the 1970ies. Drainage induced 41-75 kg C m-2 loss, which is equivalent to annual C loss rates of 0.49-0.58 kg C m-2 yr-1 and 0.31-0.63 kg C m-2 yr-1 for Cov and Ref, respectively. Mineral soil coverage had no significant effect on the amount of heterotrophic respiration, however, at Cov, the radiocarbon signature of heterotrophic CO2 was significantly (p<0.01) younger than at Ref, indicating that mineral soil coverage moved the source of decomposition of soil organic carbon (SOC) from a higher share of old peat towards a higher share of relatively younger material. In summary, our study lends support to the hypothesis that mineral soil coverage might reduce the decomposition of old peat underneath, and may therefore be a promising peatland management technique for the future use of drained peatland for agriculture.
Collapse
Affiliation(s)
- Yuqiao Wang
- Climate and Agriculture Group, Agroscope, Reckenholzstrasse 191, 8046 Zürich, Switzerland; Environmental Geosciences, University of Basel, Bernoullistrasse 30, 4056 Basel, Switzerland.
| | - Sonja M Paul
- Climate and Agriculture Group, Agroscope, Reckenholzstrasse 191, 8046 Zürich, Switzerland
| | - Markus Jocher
- Climate and Agriculture Group, Agroscope, Reckenholzstrasse 191, 8046 Zürich, Switzerland
| | - Christophe Espic
- Department of Chemistry, Biochemistry and Pharmaceutical Sciences, University of Bern, Freiestrasse 3, 3012 Bern, Switzerland; Oeschger Centre for Climate Change Research, University of Bern, Hochschulstrasse 4, 3012 Bern, Switzerland
| | - Christine Alewell
- Environmental Geosciences, University of Basel, Bernoullistrasse 30, 4056 Basel, Switzerland
| | - Sönke Szidat
- Department of Chemistry, Biochemistry and Pharmaceutical Sciences, University of Bern, Freiestrasse 3, 3012 Bern, Switzerland; Oeschger Centre for Climate Change Research, University of Bern, Hochschulstrasse 4, 3012 Bern, Switzerland
| | - Jens Leifeld
- Climate and Agriculture Group, Agroscope, Reckenholzstrasse 191, 8046 Zürich, Switzerland
| |
Collapse
|
4
|
Moroni MT, Morris DM, Shaw C, Stokland JN, Harmon ME, Fenton NJ, Merganičová K, Merganič J, Okabe K, Hagemann U. Buried Wood: A Common Yet Poorly Documented Form of Deadwood. Ecosystems 2015. [DOI: 10.1007/s10021-015-9850-4] [Citation(s) in RCA: 50] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
|
5
|
Schädel C, Schuur EAG, Bracho R, Elberling B, Knoblauch C, Lee H, Luo Y, Shaver GR, Turetsky MR. Circumpolar assessment of permafrost C quality and its vulnerability over time using long-term incubation data. GLOBAL CHANGE BIOLOGY 2014; 20:641-52. [PMID: 24399755 DOI: 10.1111/gcb.12417] [Citation(s) in RCA: 64] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/11/2013] [Accepted: 09/17/2013] [Indexed: 05/05/2023]
Abstract
High-latitude ecosystems store approximately 1700 Pg of soil carbon (C), which is twice as much C as is currently contained in the atmosphere. Permafrost thaw and subsequent microbial decomposition of permafrost organic matter could add large amounts of C to the atmosphere, thereby influencing the global C cycle. The rates at which C is being released from the permafrost zone at different soil depths and across different physiographic regions are poorly understood but crucial in understanding future changes in permafrost C storage with climate change. We assessed the inherent decomposability of C from the permafrost zone by assembling a database of long-term (>1 year) aerobic soil incubations from 121 individual samples from 23 high-latitude ecosystems located across the northern circumpolar permafrost zone. Using a three-pool (i.e., fast, slow and passive) decomposition model, we estimated pool sizes for C fractions with different turnover times and their inherent decomposition rates using a reference temperature of 5 °C. Fast cycling C accounted for less than 5% of all C in both organic and mineral soils whereas the pool size of slow cycling C increased with C : N. Turnover time at 5 °C of fast cycling C typically was below 1 year, between 5 and 15 years for slow turning over C, and more than 500 years for passive C. We project that between 20 and 90% of the organic C could potentially be mineralized to CO2 within 50 incubation years at a constant temperature of 5 °C, with vulnerability to loss increasing in soils with higher C : N. These results demonstrate the variation in the vulnerability of C stored in permafrost soils based on inherent differences in organic matter decomposability, and point toward C : N as an index of decomposability that has the potential to be used to scale permafrost C loss across landscapes.
Collapse
|
6
|
Bragazza L, Buttler A, Siegenthaler A, Mitchell EAD. Plant Litter Decomposition and Nutrient Release in Peatlands. CARBON CYCLING IN NORTHERN PEATLANDS 2013. [DOI: 10.1029/2008gm000815] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
|
7
|
Hicks Pries CE, Schuur EAG, Crummer KG. Thawing permafrost increases old soil and autotrophic respiration in tundra: partitioning ecosystem respiration using δ(13) C and ∆(14) C. GLOBAL CHANGE BIOLOGY 2013; 19:649-661. [PMID: 23504799 DOI: 10.1111/gcb.12058] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2012] [Accepted: 09/27/2012] [Indexed: 06/01/2023]
Abstract
Ecosystem respiration (Reco ) is one of the largest terrestrial carbon (C) fluxes. The effect of climate change on Reco depends on the responses of its autotrophic and heterotrophic components. How autotrophic and heterotrophic respiration sources respond to climate change is especially important in ecosystems underlain by permafrost. Permafrost ecosystems contain vast stores of soil C (1672 Pg) and are located in northern latitudes where climate change is accelerated. Warming will cause a positive feedback to climate change if heterotrophic respiration increases without corresponding increases in primary production. We quantified the response of autotrophic and heterotrophic respiration to permafrost thaw across the 2008 and 2009 growing seasons. We partitioned Reco using Δ(14) C and δ(13) C into four sources-two autotrophic (above - and belowground plant structures) and two heterotrophic (young and old soil). We sampled the Δ(14) C and δ(13) C of sources using incubations and the Δ(14) C and δ(13) C of Reco using field measurements. We then used a Bayesian mixing model to solve for the most likely contributions of each source to Reco . Autotrophic respiration ranged from 40 to 70% of Reco and was greatest at the height of the growing season. Old soil heterotrophic respiration ranged from 6 to 18% of Reco and was greatest where permafrost thaw was deepest. Overall, growing season fluxes of autotrophic and old soil heterotrophic respiration increased as permafrost thaw deepened. Areas with greater thaw also had the greatest primary production. Warming in permafrost ecosystems therefore leads to increased plant and old soil respiration that is initially compensated by increased net primary productivity. However, barring large shifts in plant community composition, future increases in old soil respiration will likely outpace productivity, resulting in a positive feedback to climate change.
Collapse
|
8
|
Belshe EF, Schuur EAG, Bolker BM, Bracho R. Incorporating spatial heterogeneity created by permafrost thaw into a landscape carbon estimate. ACTA ACUST UNITED AC 2012. [DOI: 10.1029/2011jg001836] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
9
|
Lavoie M, Mack MC, Schuur EAG. Effects of elevated nitrogen and temperature on carbon and nitrogen dynamics in Alaskan arctic and boreal soils. ACTA ACUST UNITED AC 2011. [DOI: 10.1029/2010jg001629] [Citation(s) in RCA: 77] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
10
|
Krab EJ, Oorsprong H, Berg MP, Cornelissen JH. Turning northern peatlands upside down: disentangling microclimate and substrate quality effects on vertical distribution of Collembola. Funct Ecol 2010. [DOI: 10.1111/j.1365-2435.2010.01754.x] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
|
11
|
Decomposition of old organic matter as a result of deeper active layers in a snow depth manipulation experiment. Oecologia 2010; 163:785-92. [PMID: 20084398 PMCID: PMC2886135 DOI: 10.1007/s00442-009-1556-x] [Citation(s) in RCA: 73] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2008] [Accepted: 12/18/2009] [Indexed: 11/24/2022]
Abstract
A snow addition experiment in moist acidic tussock tundra at Toolik Lake, Alaska, increased winter snow depths 2–3 m, and resulted in a doubling of the summer active layer depth. We used radiocarbon (∆14C) to (1) determine the age of C respired in the deep soils under control and deepened active layer conditions (deep snow drifts), and (2) to determine the impact of increased snow and permafrost thawing on surface CO2 efflux by partitioning respiration into autotrophic and heterotrophic components. ∆14C signatures of surface respiration were higher in the deep snow areas, reflecting a decrease in the proportion of autotrophic respiration. The radiocarbon age of soil pore CO2 sampled near the maximum mid-July thaw depth was approximately 1,000 years in deep snow treatment plots (45–55 cm thaw depth), while CO2 from the ambient snow areas was ~100 years old (30-cm thaw depth). Heterotrophic respiration ∆14C signatures from incubations were similar between the two snow depths for the organic horizon and were extremely variable in the mineral horizon, resulting in no significant differences between treatments in either month. Radiocarbon ages of heterotrophically respired C ranged from <50 to 235 years BP in July mineral soil samples and from 1,525 to 8,300 years BP in August samples, suggesting that old soil C in permafrost soils may be metabolized upon thawing. In the surface fluxes, this old C signal is obscured by the organic horizon fluxes, which are significantly higher. Our results indicate that, as permafrost in tussock tundra ecosystems of arctic Alaska thaws, carbon buried up to several thousands of years ago will become an active component of the carbon cycle, potentially accelerating the rise of CO2 in the atmosphere.
Collapse
|
12
|
Muhr J, Borken W. Delayed recovery of soil respiration after wetting of dry soil further reduces C losses from a Norway spruce forest soil. ACTA ACUST UNITED AC 2009. [DOI: 10.1029/2009jg000998] [Citation(s) in RCA: 43] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
13
|
Vicca S, Janssens IA, Flessa H, Fiedler S, Jungkunst HF. Temperature dependence of greenhouse gas emissions from three hydromorphic soils at different groundwater levels. GEOBIOLOGY 2009; 7:465-476. [PMID: 19570105 DOI: 10.1111/j.1472-4669.2009.00205.x] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/28/2023]
Abstract
Wetlands contribute considerably to the global greenhouse gas (GHG) balance. In these ecosystems, groundwater level (GWL) and temperature, two factors likely to be altered by climate change, exert important control over CO(2), CH(4) and N(2)O fluxes. However, little is known about the temperature sensitivity (Q(10)) of the combined GHG emissions from hydromorphic soils and how this Q(10) varies with GWL. We performed a greenhouse experiment in which three different (plant-free) hydromorphic soils from a temperate spruce forest were exposed to two GWLs (an intermediate GWL of -20 cm and a high GWL of -5 cm). Net CO(2), CH(4) and N(2)O fluxes were measured continuously. Here, we discuss how these fluxes responded to synoptic temperature fluctuations. Across all soils and GWLs, CO(2) emissions responded similarly to temperature and Q(10) was close to 2. The Q(10) of the CH(4) and N(2)O fluxes also was similar across soil types. GWL, on the other hand, significantly affected the Q(10) of both CH(4) and N(2)O emissions. The Q(10) of the net CH(4) fluxes increased from about 1 at GWL = -20 cm to 3 at GWL = -5 cm. For the N(2)O emissions, Q(10) varied around 2 for GWL = -20 cm and around 4 for GWL = -5 cm. This substantial GWL-effect on the Q(10) of CH(4) and N(2)O emissions was, however, hardly reflected in the Q(10) of the total GHG emissions (which varied around 2), because the contribution of these gases was relatively small compared to that of CO(2).
Collapse
Affiliation(s)
- S Vicca
- Research Group of Plant and Vegetation Ecology, Department of Biology, University of Antwerp, Wilrijk, Belgium.
| | | | | | | | | |
Collapse
|
14
|
Kane ES, Vogel JG. Patterns of Total Ecosystem Carbon Storage with Changes in Soil Temperature in Boreal Black Spruce Forests. Ecosystems 2009. [DOI: 10.1007/s10021-008-9225-1] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
15
|
Fan Z, Neff JC, Harden JW, Wickland KP. Boreal soil carbon dynamics under a changing climate: A model inversion approach. ACTA ACUST UNITED AC 2008. [DOI: 10.1029/2008jg000723] [Citation(s) in RCA: 55] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Zhaosheng Fan
- Geological Sciences Department; University of Colorado; Boulder Colorado USA
| | - Jason C. Neff
- Geological Sciences Department; University of Colorado; Boulder Colorado USA
| | | | | |
Collapse
|
16
|
Gurwick NP, McCorkle DM, Groffman PM, Gold AJ, Kellogg DQ, Seitz-Rundlett P. Mineralization of ancient carbon in the subsurface of riparian forests. ACTA ACUST UNITED AC 2008. [DOI: 10.1029/2007jg000482] [Citation(s) in RCA: 23] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Noel P. Gurwick
- Program in Biogeochemistry, Department of Natural Resources; Cornell University; Ithaca New York USA
| | - Daniel M. McCorkle
- Department of Geology and Geophysics; Woods Hole Oceanographic Institution; Woods Hole Massachusetts USA
| | | | - Arthur J. Gold
- Department of Natural Resource Science; Kingston Coastal Institute; Kingston Rhode Island USA
| | - D. Q. Kellogg
- Department of Natural Resource Science; Kingston Coastal Institute; Kingston Rhode Island USA
| | | |
Collapse
|
17
|
Plant Community Composition as a Predictor of Regional Soil Carbon Storage in Alaskan Boreal Black Spruce Ecosystems. Ecosystems 2008. [DOI: 10.1007/s10021-008-9147-y] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
|
18
|
Gerdol R, Bragazza L, Brancaleoni L. Heatwave 2003: high summer temperature, rather than experimental fertilization, affects vegetation and CO2 exchange in an alpine bog. THE NEW PHYTOLOGIST 2008; 179:142-154. [PMID: 18373651 DOI: 10.1111/j.1469-8137.2008.02429.x] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/26/2023]
Abstract
Nitrogen and phosphorus were added experimentally in a bog in the southern Alps. It was hypothesized that alleviating nutrient limitation will increase vascular plant cover. As a consequence, more carbon will be fixed through higher rates of net ecosystem CO(2) exchange (NEE). The vascular cover did increase at the expense of Sphagnum mosses. However, such vegetation changes were largely independent of the treatment and were probably triggered by an exceptional heatwave in summer 2003. Contrary to the tested hypothesis, NEE was unaffected by the nutrient treatments but was strongly influenced by temperature and water-table depth. In particular, ecosystem respiration in the hot summer of 2003 increased dramatically, presumably owing to enhanced heterotrophic respiration in an increased oxic peat layer. At the end of the experiment, the Sphagnum cover decreased significantly in the nitrogen-fertilized treatment at hummock microhabitats. In the long term, this will imply a proportionally greater accumulation of vascular litter, more easily decomposable than the recalcitrant Sphagnum litter. As a result, rates of carbon fixation may decrease because of stimulated respiration.
Collapse
Affiliation(s)
- Renato Gerdol
- Department of Biology and Evolution, Ferrara University, Corso Ercole I d'Este 32, I 44100 Ferrara, Italy
| | - Luca Bragazza
- Department of Biology and Evolution, Ferrara University, Corso Ercole I d'Este 32, I 44100 Ferrara, Italy
| | - Lisa Brancaleoni
- Department of Biology and Evolution, Ferrara University, Corso Ercole I d'Este 32, I 44100 Ferrara, Italy
| |
Collapse
|
19
|
Czimczik CI, Trumbore SE. Short-term controls on the age of microbial carbon sources in boreal forest soils. ACTA ACUST UNITED AC 2007. [DOI: 10.1029/2006jg000389] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Claudia I. Czimczik
- Department of Earth System Science; University of California; Irvine California USA
| | - Susan E. Trumbore
- Department of Earth System Science; University of California; Irvine California USA
| |
Collapse
|
20
|
Cisneros-Dozal LM, Trumbore SE, Hanson PJ. Effect of moisture on leaf litter decomposition and its contribution to soil respiration in a temperate forest. ACTA ACUST UNITED AC 2007. [DOI: 10.1029/2006jg000197] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
|
21
|
Carrasco JJ, Neff JC, Harden JW. Modeling physical and biogeochemical controls over carbon accumulation in a boreal forest soil. ACTA ACUST UNITED AC 2006. [DOI: 10.1029/2005jg000087] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Affiliation(s)
- Jonathan J. Carrasco
- U.S. Geological Survey; Menlo Park California USA
- Geological Sciences Department; University of Colorado; Boulder Colorado USA
| | - Jason C. Neff
- Geological Sciences Department; University of Colorado; Boulder Colorado USA
| | | |
Collapse
|
22
|
Smith NV. Trends in high northern latitude soil freeze and thaw cycles from 1988 to 2002. ACTA ACUST UNITED AC 2004. [DOI: 10.1029/2003jd004472] [Citation(s) in RCA: 106] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
|