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Mironov VL, Linkevich EV. Effects of the lunar cycle on ecosystem and heterotrophic respiration in a boreal Sphagnum-dominated peatland. Chronobiol Int 2024:1-12. [PMID: 38888285 DOI: 10.1080/07420528.2024.2365825] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2024] [Accepted: 06/04/2024] [Indexed: 06/20/2024]
Abstract
The growth of Sphagnum is influenced by the lunar cycle, which suggests a corresponding carbon (C) accumulation rhythm in peatlands. However, this rhythm can only occur if C accumulation from Sphagnum growth is not offset by its total losses through respiration and other processes. To address the uncertainty, through correlation-regression analysis we examine the influence of the lunar cycle on recent measurements of ecosystem (ER) and heterotrophic (Rh) respiration conducted by Järveoja and colleagues on the oligotrophic peatland of Degerö Stormyr. We found that ER and Rh accelerated near the full moon and slowed down near the new moon. The response of the hourly ER to the lunar cycle is significant from 22:00 to 8:00 and is not significant beyond this range. This response was concentrated in the initial and finished phases of the season, but during the middle of the season it disappeared. This behavior could potentially be caused by the high sensitivity of the Sphagnum cover to moonlight, as well as the sensitivity to the lunar cycle of only the nocturnal component ER. During most of the day, the lunar cycle had a significant effect on hourly Rh, with the highest impact observed between 5:00 and 10:00 and at 20:00. The greatest impact occurs during those hours when ER declines, and possibly Sphagnum photosynthetic productivity peaks. The findings suggest a circalunar rhythm of C accumulation in peatlands due to the opposite trends between C accumulation during Sphagnum growth and C losses with respiration during the lunar cycle.
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Affiliation(s)
- Victor L Mironov
- Department of Multidisciplinary Scientific Research of the Karelian Research Centre of the Russian Academy of Sciences, Petrozavodsk, Russia
| | - Elizaveta V Linkevich
- Department of Multidisciplinary Scientific Research of the Karelian Research Centre of the Russian Academy of Sciences, Petrozavodsk, Russia
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2
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Sang J, Zhao Y, Shen Y, Shurpali NJ, Li Y. Optimizing irrigation and nitrogen addition to balance grassland biomass production with greenhouse gas emissions: A mesocosm study. ENVIRONMENTAL RESEARCH 2024; 249:118387. [PMID: 38336162 DOI: 10.1016/j.envres.2024.118387] [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: 08/07/2023] [Revised: 01/10/2024] [Accepted: 01/30/2024] [Indexed: 02/12/2024]
Abstract
Achieving a balance between greenhouse gas mitigation and biomass production in grasslands necessitates optimizing irrigation frequency and nitrogen addition, which significantly influence grassland productivity and soil nitrous oxide emissions, and consequently impact the ecosystem carbon dioxide exchange. This study aimed to elucidate these influences using a controlled mesocosm experiment where bermudagrass (Cynodon dactylon L.) was cultivated under varied irrigation frequencies (daily and every 6 days) with (100 kg ha-1) or without nitrogen addition; measurements of net ecosystem carbon dioxide exchange, ecosystem respiration, soil respiration, and nitrous oxide emissions across two cutting events were performed as well. The findings revealed a critical interaction between water-filled pore space, regulated by irrigation, and nitrogen availability, with the latter exerting a more substantial influence on aboveground biomass growth and ecosystem carbon dioxide exchange than water availability. Moreover, the total dry matter was significantly higher with nitrogen addition compared to without nitrogen addition, irrespective of the irrigation frequency. In contrast, soil nitrous oxide emissions were observed to be significantly higher with increased irrigation frequency and nitrogen addition. The effects of nitrogen addition on soil respiration components appeared to depend on water availability, with autotrophic respiration seeing a significant rise with nitrogen addition under limited irrigation (5.4 ± 0.6 μmol m-2 s-1). Interestingly, the lower irrigation frequency did not result in water stress, suggesting resilience in bermudagrass. These findings highlight the importance of considering interactions between irrigation and nitrogen addition to optimize water and nitrogen input in grasslands for a synergistic balance between grassland biomass production and greenhouse gas emission mitigation.
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Affiliation(s)
- Jianhui Sang
- The State Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems, Qingyang National Field Scientific Observation and Research Station of Grassland Agro-Ecosystems, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, 730020, China
| | - Yixuan Zhao
- The State Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems, Qingyang National Field Scientific Observation and Research Station of Grassland Agro-Ecosystems, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, 730020, China
| | - Yuying Shen
- The State Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems, Qingyang National Field Scientific Observation and Research Station of Grassland Agro-Ecosystems, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, 730020, China
| | - Narasinha J Shurpali
- Grasslands and Sustainable Farming, Production Systems Unit, Natural Resources Institute Finland, Halolantie 31A, Kuopio, FI-71750, Finland
| | - Yuan Li
- The State Key Laboratory of Herbage Improvement and Grassland Agro-ecosystems, Qingyang National Field Scientific Observation and Research Station of Grassland Agro-Ecosystems, College of Pastoral Agriculture Science and Technology, Lanzhou University, Lanzhou, 730020, China.
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3
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Li C, Li X, Yang Y, Shi Y, Zhang J. Comparative responses of carbon flux components in recovering bare patches of degraded alpine meadow in the Source Zone of the Yellow River. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 908:168343. [PMID: 37931819 DOI: 10.1016/j.scitotenv.2023.168343] [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: 07/18/2023] [Revised: 10/24/2023] [Accepted: 11/03/2023] [Indexed: 11/08/2023]
Abstract
The patchy degradation of alpine grasslands is a common phenomenon on the Qinghai-Tibetan Plateau, and the presence of bare patches (BP) in degraded grasslands significantly affects the functioning of the alpine meadow ecosystem. The succession of vegetation-recovered BP may lead to significant changes in ecosystem carbon (C) cycling. To date, it is unclear whether different components of net ecosystem carbon exchange (NEE) respond similarly or differently to the succession of recovering BP. Here, we conducted a field monitoring experiment in a degraded alpine meadow, and selected three successional stages for recovering BP to study the response of NEE and its components. We found that the succession of recoevering BP increased ecosystem respiration (ER) during the growing season and decreased ER during the off-growing season, with the differences in annual carbon output between different successional stages being insignificant. However, gross primary productivity increased with the successional gradient, and carbon input at the later stage of succession was significantly greater than that at the middle stage of succession. The succession of recovering BP promoted the carbon sequestration function of the alpine grassland, with the grassland acting as a carbon sink when it reached the state of healthy alpine meadow, while it acted as a carbon source during the middle stage of succession. Compared with BP, the amount of carbon sequested by healthy alpine meadows increased significantly by 219 g·C·m-2·yr-1. We also found that the responses of other components to the succession of recovering BP were inconsistent. In addition, the effects of succession of recovering BP on carbon flux were related to field-monitored variables (soil temperature and water content) and other considered variables (biomass, organic carbon, and microbial biomass carbon). These research findings highlight the importance of restoring vegetation in BPs, and are crucial for predicting the carbon balance in the future and formulating sustainable grassland management strategies.
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Affiliation(s)
- Chengyi Li
- College of Agriculture and Animal Husbandry, State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining 810016, China
| | - Xilai Li
- College of Agriculture and Animal Husbandry, State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining 810016, China.
| | - Yuanwu Yang
- College of Agriculture and Animal Husbandry, State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining 810016, China
| | - Yan Shi
- School of Environment, the University of Auckland, Auckland 1010, New Zealand
| | - Jing Zhang
- College of Agriculture and Animal Husbandry, State Key Laboratory of Plateau Ecology and Agriculture, Qinghai University, Xining 810016, China
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Pacheco-Cancino PA, Carrillo-López RF, Sepulveda-Jauregui A, Somos-Valenzuela MA. Sphagnum mosses, the impact of disturbances and anthropogenic management actions on their ecological role in CO 2 fluxes generated in peatland ecosystems. GLOBAL CHANGE BIOLOGY 2024; 30:e16972. [PMID: 37882506 DOI: 10.1111/gcb.16972] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/28/2023] [Revised: 09/10/2023] [Accepted: 09/12/2023] [Indexed: 10/27/2023]
Abstract
Mosses of the genus Sphagnum are the dominant vegetation in most pristine peatlands in temperate and high-latitude regions. They play a crucial role in carbon sequestration, being responsible for ca. 50% of carbon accumulation through their active participation in peat formation. They have a significant influence on the dynamics of CO2 emissions due to an efficient maximum potential photosynthetic rate, lower respiration rates, and the production of a recalcitrant litter whose decomposition is gradual. However, various anthropogenic disturbances and land use management actions that favor its reestablishment have the potential to modify the dynamics of these CO2 emissions. Therefore, the objective of this review is to discuss the role of Sphagnum in CO2 emissions generated in peatland ecosystems, and to understand the impacts of anthropogenic practices favorable and detrimental to Sphagnum on these emissions. Based on our review, increased Sphagnum cover reduces CO2 emissions and fosters C sequestration, but drainage transforms peatlands dominated by Sphagnum into a persistent source of CO2 due to lower gross primary productivity of the moss and increased respiration rates. Sites with moss removal used as donor material for peatland restoration emit twice as much CO2 as adjacent undisturbed natural sites, and those with commercial Sphagnum extraction generate almost neutral CO2 emissions, yet both can recover their sink status in the short term. The reintroduction of fragments and natural recolonization of Sphagnum in transitional peatlands, can reduce emissions, recover, or increase the CO2 sink function in the short and medium term. Furthermore, Sphagnum paludiculture is seen as a sustainable alternative for the use of transitional peatlands, allowing moss production strips to become CO2 sink, however, it is necessary to quantify the emissions of all the components of the field of production (ditches, causeway), and the biomass harvested from the moss to establish a final closing balance of C.
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Affiliation(s)
- Patricio A Pacheco-Cancino
- Department of Agricultural Sciences and Natural Resources, Faculty of Agricultural and Environmental Sciences, Universidad de La Frontera, Temuco, Región de La Araucanía, Chile
- Doctorate in Agri-Food and Environmental Sciences, Faculty of Agricultural and Environmental Sciences, Universidad de La Frontera, Temuco, Región de La Araucanía, Chile
| | - Rubén F Carrillo-López
- Department of Agricultural Sciences and Natural Resources, Faculty of Agricultural and Environmental Sciences, Universidad de La Frontera, Temuco, Región de La Araucanía, Chile
| | - Armando Sepulveda-Jauregui
- Gaia Antarctic Research Center (CIGA), Universidad de Magallanes, Punta Arenas, Región de Magallanes y Antartica Chilena, Chile
- Network for Extreme Environment Research (NEXER), Universidad de Magallanes, Punta Arenas, Región de Magallanes y Antartica Chilena, Chile
| | - Marcelo A Somos-Valenzuela
- Department of Forest Sciences, Faculty of Agricultural and Environmental Science, Universidad de La Frontera, Temuco, Región de La Araucanía, Chile
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Ehnvall B, Ågren AM, Nilsson MB, Ratcliffe JL, Noumonvi KD, Peichl M, Lidberg W, Giesler R, Mörth CM, Öquist MG. Catchment characteristics control boreal mire nutrient regime and vegetation patterns over ~5000 years of landscape development. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 895:165132. [PMID: 37379918 DOI: 10.1016/j.scitotenv.2023.165132] [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: 04/18/2023] [Revised: 06/21/2023] [Accepted: 06/23/2023] [Indexed: 06/30/2023]
Abstract
Vegetation holds the key to many properties that make natural mires unique, such as surface microtopography, high biodiversity values, effective carbon sequestration and regulation of water and nutrient fluxes across the landscape. Despite this, landscape controls behind mire vegetation patterns have previously been poorly described at large spatial scales, which limits the understanding of basic drivers underpinning mire ecosystem services. We studied catchment controls on mire nutrient regimes and vegetation patterns using a geographically constrained natural mire chronosequence along the isostatically rising coastline in Northern Sweden. By comparing mires of different ages, we can partition vegetation patterns caused by long-term mire succession (<5000 years) and present-day vegetation responses to catchment eco-hydrological settings. We used the remote sensing based normalized difference vegetation index (NDVI) to describe mire vegetation and combined peat physicochemical measures with catchment properties to identify the most important factors that determine mire NDVI. We found strong evidence that mire NDVI depends on nutrient inputs from the catchment area or underlying mineral soil, especially concerning phosphorus and potassium concentrations. Steep mire and catchment slopes, dry conditions and large catchment areas relative to mire areas were associated with higher NDVI. We also found long-term successional patterns, with lower NDVI in older mires. Importantly, the NDVI should be used to describe mire vegetation patterns in open mires if the focus is on surface vegetation, since the canopy cover in tree-covered mires completely dominated the NDVI signal. With our study approach, we can quantitatively describe the connection between landscape properties and mire nutrient regime. Our results confirm that mire vegetation responds to the upslope catchment area, but importantly, also suggest that mire and catchment aging can override the role of catchment influence. This effect was clear across mires of all ages, but was strongest in younger mires.
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Affiliation(s)
- Betty Ehnvall
- Department of Forest Ecology and Management, Swedish University of Agricultural Sciences, Skogsmarksgränd 17, 90183 Umeå, Sweden.
| | - Anneli M Ågren
- Department of Forest Ecology and Management, Swedish University of Agricultural Sciences, Skogsmarksgränd 17, 90183 Umeå, Sweden
| | - Mats B Nilsson
- Department of Forest Ecology and Management, Swedish University of Agricultural Sciences, Skogsmarksgränd 17, 90183 Umeå, Sweden
| | - Joshua L Ratcliffe
- Unit for Field-Based Forest Research, Swedish University of Agricultural Sciences, 922 91 Vindeln, Sweden
| | - Koffi Dodji Noumonvi
- Department of Forest Ecology and Management, Swedish University of Agricultural Sciences, Skogsmarksgränd 17, 90183 Umeå, Sweden
| | - Matthias Peichl
- Department of Forest Ecology and Management, Swedish University of Agricultural Sciences, Skogsmarksgränd 17, 90183 Umeå, Sweden
| | - William Lidberg
- Department of Forest Ecology and Management, Swedish University of Agricultural Sciences, Skogsmarksgränd 17, 90183 Umeå, Sweden
| | - Reiner Giesler
- Climate Impacts Research Centre Umeå, Sweden, Department of Ecology and Environmental Sciences, Umeå University, 90736 Umeå, Sweden
| | - Carl-Magnus Mörth
- Department of Geological Sciences, Stockholm University, Svante Arrheniusväg 8, 10691 Stockholm, Sweden
| | - Mats G Öquist
- Department of Forest Ecology and Management, Swedish University of Agricultural Sciences, Skogsmarksgränd 17, 90183 Umeå, Sweden
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Voigt C, Virkkala AM, Hould Gosselin G, Bennett KA, Black TA, Detto M, Chevrier-Dion C, Guggenberger G, Hashmi W, Kohl L, Kou D, Marquis C, Marsh P, Marushchak ME, Nesic Z, Nykänen H, Saarela T, Sauheitl L, Walker B, Weiss N, Wilcox EJ, Sonnentag O. Arctic soil methane sink increases with drier conditions and higher ecosystem respiration. NATURE CLIMATE CHANGE 2023; 13:1095-1104. [PMID: 37810622 PMCID: PMC10550823 DOI: 10.1038/s41558-023-01785-3] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/10/2023] [Accepted: 07/31/2023] [Indexed: 10/10/2023]
Abstract
Arctic wetlands are known methane (CH4) emitters but recent studies suggest that the Arctic CH4 sink strength may be underestimated. Here we explore the capacity of well-drained Arctic soils to consume atmospheric CH4 using >40,000 hourly flux observations and spatially distributed flux measurements from 4 sites and 14 surface types. While consumption of atmospheric CH4 occurred at all sites at rates of 0.092 ± 0.011 mgCH4 m-2 h-1 (mean ± s.e.), CH4 uptake displayed distinct diel and seasonal patterns reflecting ecosystem respiration. Combining in situ flux data with laboratory investigations and a machine learning approach, we find biotic drivers to be highly important. Soil moisture outweighed temperature as an abiotic control and higher CH4 uptake was linked to increased availability of labile carbon. Our findings imply that soil drying and enhanced nutrient supply will promote CH4 uptake by Arctic soils, providing a negative feedback to global climate change.
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Affiliation(s)
- Carolina Voigt
- Department of Environmental and Biological Sciences, University of Eastern Finland, Kuopio, Finland
- Département de géographie & Centre d’études nordiques, Université de Montréal, Montréal, Quebec Canada
- Institute of Soil Science, Universität Hamburg, Hamburg, Germany
| | | | - Gabriel Hould Gosselin
- Département de géographie & Centre d’études nordiques, Université de Montréal, Montréal, Quebec Canada
- Department of Geography and Environmental Studies & Cold Regions Research Centre, Wilfrid Laurier University, Waterloo, Ontario Canada
| | - Kathryn A. Bennett
- Département de géographie & Centre d’études nordiques, Université de Montréal, Montréal, Quebec Canada
| | - T. Andrew Black
- Faculty of Land and Food Systems, University of British Columbia, Vancouver, British Columbia Canada
| | - Matteo Detto
- Department of Ecology and Evolutionary Biology, Princeton University, Princeton, NJ USA
| | - Charles Chevrier-Dion
- Département de géographie & Centre d’études nordiques, Université de Montréal, Montréal, Quebec Canada
| | - Georg Guggenberger
- Institute of Soil Science, Leibniz Universität Hannover, Hannover, Germany
| | - Wasi Hashmi
- Department of Environmental and Biological Sciences, University of Eastern Finland, Kuopio, Finland
| | - Lukas Kohl
- Department of Environmental and Biological Sciences, University of Eastern Finland, Kuopio, Finland
| | - Dan Kou
- Department of Environmental and Biological Sciences, University of Eastern Finland, Kuopio, Finland
| | - Charlotte Marquis
- Département de géographie & Centre d’études nordiques, Université de Montréal, Montréal, Quebec Canada
| | - Philip Marsh
- Department of Geography and Environmental Studies & Cold Regions Research Centre, Wilfrid Laurier University, Waterloo, Ontario Canada
| | - Maija E. Marushchak
- Department of Environmental and Biological Sciences, University of Eastern Finland, Kuopio, Finland
- Department of Biological and Environmental Science, University of Jyväskylä, Jyväskylä, Finland
| | - Zoran Nesic
- Faculty of Land and Food Systems, University of British Columbia, Vancouver, British Columbia Canada
| | - Hannu Nykänen
- Department of Environmental and Biological Sciences, University of Eastern Finland, Kuopio, Finland
| | - Taija Saarela
- Department of Environmental and Biological Sciences, University of Eastern Finland, Kuopio, Finland
| | - Leopold Sauheitl
- Institute of Soil Science, Leibniz Universität Hannover, Hannover, Germany
| | - Branden Walker
- Department of Geography and Environmental Studies & Cold Regions Research Centre, Wilfrid Laurier University, Waterloo, Ontario Canada
| | - Niels Weiss
- Department of Geography and Environmental Studies & Cold Regions Research Centre, Wilfrid Laurier University, Waterloo, Ontario Canada
- Northwest Territories Geological Survey, Yellowknife, Northwest Territories Canada
| | - Evan J. Wilcox
- Department of Geography and Environmental Studies & Cold Regions Research Centre, Wilfrid Laurier University, Waterloo, Ontario Canada
| | - Oliver Sonnentag
- Département de géographie & Centre d’études nordiques, Université de Montréal, Montréal, Quebec Canada
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Laine AM, Korrensalo A, Tuittila ES. Plant functional traits play the second fiddle to plant functional types in explaining peatland CO 2 and CH 4 gas exchange. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 834:155352. [PMID: 35460776 DOI: 10.1016/j.scitotenv.2022.155352] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Revised: 01/21/2022] [Accepted: 04/13/2022] [Indexed: 06/14/2023]
Abstract
Peatlands constitute a significant soil carbon (C) store, yet the C gas flux components show distinct spatial variation both between and within peatlands. Determining the controls on this variability could aid in our understanding of the response of peatlands to global changes. In this study, we assess the usefulness of different vegetation related parameters to explain spatial variation in peatland C gas flux components. We hypothesise that spatial variation is best explained by trait-based indices (similarly to other terrestrial ecosystems), and that the impact of soil physicochemical properties, such as nitrogen (N) content or water level, can be manifested through the traits. Furthermore, we expect that the spatial variability associated with each of the C gas flux components can be explained by a distinct set of traits. To address our aim, we used a successional peatland chronosequence from wet meadows to a bog, along which all variables were recorded with similar methods and under similar climatic conditions. We observed spatial variability with all measured gas fluxes, with carbon dioxide (CO2) fluxes showing significant variability between sites, while within site variability was more important for methane (CH4) fluxes. As expected, our results show that the impacts of physicochemical conditions were directed via vegetation. However, the cover of functional plant types that capture multiple traits proved to be more powerful in explaining gas flux variability compared to functional trait-based indices. Our findings imply that for future gas flux modelling purposes, rather than attempting to use individual traits - as is the ongoing trend in ecology - it might be more useful to refine plant functional groupings and ensure they are based on a set of plant traits relevant for the studied ecosystem process. This could be facilitated by the collation of a large data set of traits measured from peatlands.
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Affiliation(s)
- Anna M Laine
- School of Forest Sciences, University of Eastern Finland, P.O. Box 111, FI-80101 Joensuu, Finland; Department of Ecology and Genetics, University of Oulu, P.O. Box 3000, FI-90014, Finland; Geological Survey of Finland, P.O Box 1237, FI-70211 Kuopio, Finland(1).
| | - Aino Korrensalo
- School of Forest Sciences, University of Eastern Finland, P.O. Box 111, FI-80101 Joensuu, Finland; Natural Resources Institute Finland (LUKE), Yliopistokatu 6 B, FI-80100 Joensuu, Finland; Department of Environmental and Biological Sciences, P.O. Box 1627, FI-70211 Kuopio, Finland
| | - Eeva-Stiina Tuittila
- School of Forest Sciences, University of Eastern Finland, P.O. Box 111, FI-80101 Joensuu, Finland
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Antala M, Juszczak R, van der Tol C, Rastogi A. Impact of climate change-induced alterations in peatland vegetation phenology and composition on carbon balance. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 827:154294. [PMID: 35247401 DOI: 10.1016/j.scitotenv.2022.154294] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2021] [Revised: 02/03/2022] [Accepted: 02/28/2022] [Indexed: 06/14/2023]
Abstract
Global climate is changing faster than humankind has ever experienced. Model-based predictions of future climate are becoming more complex and precise, but they still lack crucial information about the reaction of some important ecosystems, such as peatlands. Peatlands belong to one of the largest carbon stores on the Earth. They are mostly distributed in high latitudes, where the temperature rises faster than in the other parts of the planet. Warmer climate and changes in precipitation patterns cause changes in the composition and phenology of peatland vegetation. Peat mosses are becoming less abundant, vascular plants cover is increasing, and the vegetation season and phenophases of vascular plants start sooner. The alterations in vegetation cause changes in the carbon assimilation and release of greenhouse gases. Therefore, this article reviews the impact of climate change-induced alterations in peatland vegetation phenology and composition on future climate and the uncertainties that need to be addressed for more accurate climate prediction.
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Affiliation(s)
- Michal Antala
- Laboratory of Bioclimatology, Department of Ecology and Environmental Protection, Faculty of Environmental Engineering and Mechanical Engineering, Poznan University of Life Sciences, Piątkowska 94, 60-649 Poznań, Poland
| | - Radoslaw Juszczak
- Laboratory of Bioclimatology, Department of Ecology and Environmental Protection, Faculty of Environmental Engineering and Mechanical Engineering, Poznan University of Life Sciences, Piątkowska 94, 60-649 Poznań, Poland
| | - Christiaan van der Tol
- Faculty of Geo-Information Science and Earth Observation (ITC), University of Twente, 7500 AE Enschede, the Netherlands
| | - Anshu Rastogi
- Laboratory of Bioclimatology, Department of Ecology and Environmental Protection, Faculty of Environmental Engineering and Mechanical Engineering, Poznan University of Life Sciences, Piątkowska 94, 60-649 Poznań, Poland; Faculty of Geo-Information Science and Earth Observation (ITC), University of Twente, 7500 AE Enschede, the Netherlands.
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9
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Shao S, Wu J, He H, Roulet N. Integrating McGill Wetland Model (MWM) with peat cohort tracking and microbial controls. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 806:151223. [PMID: 34717989 DOI: 10.1016/j.scitotenv.2021.151223] [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: 04/30/2021] [Revised: 10/11/2021] [Accepted: 10/21/2021] [Indexed: 06/13/2023]
Abstract
Peatlands store a large amount of organic carbon and are vulnerable to climate change and human disturbances. However, ecosystem-scale peatland models often do not explicitly simulate the decrease in peat substrate quality, i.e., decomposability or the dynamics of decomposers during peat decomposition, which are key controls in determining peat carbon's response to a changing environment. In this paper, we incorporated the tracking of each year's litter input (a cohort) and controls of microbial processes into the McGill Wetland Model (MWMmic) to address this discrepancy. Three major modifications were made: (1) the simple acrotelm-catotelm decomposition model in MWM was changed into a time-aggregated cohort model, to track the decrease in peat quality with decomposition age; (2) microbial dynamics: growth, respiration and death were incorporated into the model and decomposition rates are regulated by microbial biomass; and (3) vertical and horizontal transport of the dissolved organic carbon (DOC) were added and used to regulate the growth of microbial biomass. MWMmic was evaluated against measurements from the Mer Bleue peatland, a raised ombrotrophic bog located in southern Ontario, Canada. The model was able to replicate microbial and DOC dynamics, while at the same time reproduce the ecosystem-level CO2 and DOC fluxes. Sensitivity analysis with MWMmic showed increased peatland resilience to perturbations compared to the original MWM, because of the tracking of peat substrate quality. The analysis revealed the most important parameters in the model to be microbial carbon use efficiency (CUE) and turnover rate. Simulated microbial adaptation with those two physiological parameters less sensitive to disturbances leads to a significantly larger peat C loss in response to warming and water table drawdown. Thus, the rarely explored peatland microbial physiological traits merit further research. This work paves the way for further model development to examine important microbial controls on peatland's biogeochemical cycling.
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Affiliation(s)
- Siya Shao
- Department of Geography, McGill University, Canada
| | - Jianghua Wu
- Environment and Sustainability, School of Science and the Environment, Memorial University of Newfoundland, Canada
| | - Hongxing He
- Department of Geography, McGill University, Canada
| | - Nigel Roulet
- Department of Geography, McGill University, Canada.
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Capooci M, Vargas R. Diel and seasonal patterns of soil CO 2 efflux in a temperate tidal marsh. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 802:149715. [PMID: 34461472 DOI: 10.1016/j.scitotenv.2021.149715] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Revised: 05/04/2021] [Accepted: 08/12/2021] [Indexed: 06/13/2023]
Abstract
Tidal marshes store large amounts of carbon; however, little is known about the patterns, magnitudes, and biophysical drivers that regulate CO2 efflux from these ecosystems. Due to harsh environmental conditions (e.g., flooding), it is difficult to measure continuous soil CO2 efflux in tidal marshes. These data are necessary to inform empirical and process-based models and to better quantify carbon budgets. We performed automated (30 min) and manual (bi-monthly) soil CO2 efflux measurements, for ~20 months, at two sites in a temperate tidal marsh: tall Spartina (TS; dominated by S. cynosuroides) and short Spartina (SS; dominated by S. alterniflora). These measurements were coupled with water quality, canopy spectral reflectance, and meteorological measurements. There were no consistent diel patterns of soil CO2 efflux, suggesting a decoupling of soil CO2 efflux with diel variations in temperature and tides (i.e., water level) showing a hysteresis effect. Mean soil CO2 efflux was significantly higher at SS (2.15 ± 1.60 μmol CO2 m-2 s-1) than at TS (0.55 ± 0.80 μmol CO2 m-2 s-1), highlighting distinct biogeochemical spatial variability. At the annual scale, air temperature explained >50% of the variability in soil CO2 efflux at both sites; and water level and salinity were secondary drivers of soil CO2 efflux at SS and TS, respectively. Annual soil CO2 efflux varied from 287-876 to 153-211 g C m-2 y-1 at SS and TS, respectively, but manual measurements underestimated the annual flux by <67% at SS and <23% at TS. These results suggest that measuring and modeling diel soil CO2 efflux variability in tidal marshes may be more challenging than previously expected and highlight large discrepancies between manual and automated soil CO2 efflux measurements. New technical approaches are needed to implement long-term automated measurements of soil CO2 efflux across wetlands to properly estimate the carbon balance of these ecosystems.
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Affiliation(s)
- Margaret Capooci
- Department of Plant and Soil Sciences, University of Delaware, Newark, DE 19716, USA
| | - Rodrigo Vargas
- Department of Plant and Soil Sciences, University of Delaware, Newark, DE 19716, USA.
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Salimi S, Berggren M, Scholz M. Response of the peatland carbon dioxide sink function to future climate change scenarios and water level management. GLOBAL CHANGE BIOLOGY 2021; 27:5154-5168. [PMID: 34157201 DOI: 10.1111/gcb.15753] [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: 04/22/2021] [Accepted: 06/09/2021] [Indexed: 06/13/2023]
Abstract
Stress factors such as climate change and drought may switch the role of temperate peatlands from carbon dioxide (CO2 ) sinks to sources, leading to positive feedback to global climate change. Water level management has been regarded as an important climate change mitigation strategy as it can sustain the natural net CO2 sink function of a peatland. Little is known about how resilient peatlands are in the face of future climate change scenarios, as well as how effectively water level management can sustain the CO2 sink function to mitigate global warming. The authors assess the effect of climate change on CO2 exchange of south Swedish temperate peatlands, which were either unmanaged or subject to water level regulation. Climate chamber simulations were conducted using experimental peatland mesocosms exposed to current and future representative concentration pathway (RCP) climate scenarios (RCP 2.6, 4.5 and 8.5). The results showed that all managed and unmanaged systems under future climate scenarios could serve as CO2 sinks throughout the experimental period. However, the 2018 extreme drought caused the unmanaged mesocosms under the RCP 4.5 and RCP 8.5 switch from a net CO2 sink to a source during summer. Surprisingly, the unmanaged mesocosms under RCP 2.6 benefited from the warmer climate, and served as the best sink among the other unmanaged systems. Water level management had the greatest effect on the CO2 sink function under RCP 8.5 and RCP 4.5, which improved their CO2 sink capability up to six and two times, respectively. Under the current climate scenario, water level management had a negative effect on the CO2 sink function, and it had almost no effect under RCP 2.6. Therefore, the researchers conclude that water level management is necessary for RCP 8.5, beneficial for RCP 4.5 and unimportant for RCP 2.6 and the current climate.
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Affiliation(s)
- Shokoufeh Salimi
- Division of Water Resources Engineering, Faculty of Engineering, Lund University, Lund, Sweden
| | - Martin Berggren
- Department of Physical Geography and Ecosystem Science, Lund University, Lund, Sweden
| | - Miklas Scholz
- Division of Water Resources Engineering, Faculty of Engineering, Lund University, Lund, Sweden
- Department of Civil Engineering Science, School of Civil Engineering and the Built Environment, University of Johannesburg, Johannesburg, South Africa
- Department of Town Planning, Engineering Networks and Systems, South Ural State University (National Research University), Chelyabinsk, The Russian Federation
- Institute of Environmental Engineering, Wroclaw University of Environmental and Life Sciences, Wrocław, Poland
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12
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Virkkala AM, Aalto J, Rogers BM, Tagesson T, Treat CC, Natali SM, Watts JD, Potter S, Lehtonen A, Mauritz M, Schuur EAG, Kochendorfer J, Zona D, Oechel W, Kobayashi H, Humphreys E, Goeckede M, Iwata H, Lafleur PM, Euskirchen ES, Bokhorst S, Marushchak M, Martikainen PJ, Elberling B, Voigt C, Biasi C, Sonnentag O, Parmentier FJW, Ueyama M, Celis G, St Louis VL, Emmerton CA, Peichl M, Chi J, Järveoja J, Nilsson MB, Oberbauer SF, Torn MS, Park SJ, Dolman H, Mammarella I, Chae N, Poyatos R, López-Blanco E, Christensen TR, Kwon MJ, Sachs T, Holl D, Luoto M. Statistical upscaling of ecosystem CO 2 fluxes across the terrestrial tundra and boreal domain: Regional patterns and uncertainties. GLOBAL CHANGE BIOLOGY 2021; 27:4040-4059. [PMID: 33913236 DOI: 10.1111/gcb.15659] [Citation(s) in RCA: 21] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Accepted: 03/05/2021] [Indexed: 06/12/2023]
Abstract
The regional variability in tundra and boreal carbon dioxide (CO2 ) fluxes can be high, complicating efforts to quantify sink-source patterns across the entire region. Statistical models are increasingly used to predict (i.e., upscale) CO2 fluxes across large spatial domains, but the reliability of different modeling techniques, each with different specifications and assumptions, has not been assessed in detail. Here, we compile eddy covariance and chamber measurements of annual and growing season CO2 fluxes of gross primary productivity (GPP), ecosystem respiration (ER), and net ecosystem exchange (NEE) during 1990-2015 from 148 terrestrial high-latitude (i.e., tundra and boreal) sites to analyze the spatial patterns and drivers of CO2 fluxes and test the accuracy and uncertainty of different statistical models. CO2 fluxes were upscaled at relatively high spatial resolution (1 km2 ) across the high-latitude region using five commonly used statistical models and their ensemble, that is, the median of all five models, using climatic, vegetation, and soil predictors. We found the performance of machine learning and ensemble predictions to outperform traditional regression methods. We also found the predictive performance of NEE-focused models to be low, relative to models predicting GPP and ER. Our data compilation and ensemble predictions showed that CO2 sink strength was larger in the boreal biome (observed and predicted average annual NEE -46 and -29 g C m-2 yr-1 , respectively) compared to tundra (average annual NEE +10 and -2 g C m-2 yr-1 ). This pattern was associated with large spatial variability, reflecting local heterogeneity in soil organic carbon stocks, climate, and vegetation productivity. The terrestrial ecosystem CO2 budget, estimated using the annual NEE ensemble prediction, suggests the high-latitude region was on average an annual CO2 sink during 1990-2015, although uncertainty remains high.
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Affiliation(s)
- Anna-Maria Virkkala
- Department of Geosciences and Geography, Faculty of Science, University of Helsinki, Helsinki, Finland
- Woodwell Climate Research Center, Falmouth, MA, USA
| | - Juha Aalto
- Department of Geosciences and Geography, Faculty of Science, University of Helsinki, Helsinki, Finland
- Weather and Climate Change Impact Research, Finnish Meteorological Institute, Helsinki, Finland
| | | | - Torbern Tagesson
- Department of Physical Geography and Ecosystem Science, Lund University, Lund, Sweden
- Department of Geosciences and Natural Resource Management, Copenhagen University, Copenhagen, Denmark
| | - Claire C Treat
- Alfred Wegener Institute Helmholtz Center for Polar and Marine Research, Potsdam, Germany
| | | | | | | | | | | | - Edward A G Schuur
- Center for Ecosystem Science and Society, Department of Biological Sciences, Northern Arizona University, Flagstaff, AZ, USA
| | - John Kochendorfer
- Atmosperic Turbulence and Diffusion Division of NOAA's Air Resources Laboratory, Oak Ridge, TN, USA
| | - Donatella Zona
- San Diego State University, San Diego, CA, USA
- University of Sheffield, Sheffield, UK
| | - Walter Oechel
- San Diego State University, San Diego, CA, USA
- University of Exeter, Exeter, UK
| | - Hideki Kobayashi
- Research Institute for Global Change, Japan Agency for Marine-Earth Science and Technology, Yokoama, Japan
| | | | - Mathias Goeckede
- Dept. Biogeochemical Signals, Max Planck Institute for Biogeochemistry, Jena, Germany
| | - Hiroki Iwata
- Department of Environmental Science, Shinshu University, Matsumoto, Japan
| | - Peter M Lafleur
- School of the Environment, Trent University, Peterborough, ON, Canada
| | | | - Stef Bokhorst
- Vrije Universiteit Amsterdam, Amsterdam, the Netherlands
| | - Maija Marushchak
- Department of Biological and Environmental Science, University of Jyväskylä, Jyväskylä, Finland
- Department of Environmental and Biological Sciences, University of Eastern Finland, Kuopio, Finland
| | - Pertti J Martikainen
- Department of Environmental and Biological Sciences, University of Eastern Finland, Kuopio, Finland
| | - Bo Elberling
- Center for Permafrost, Department of Geoscience and Natural Resource Management, University of Copenhagen, Copenhagen, Denmark
| | - Carolina Voigt
- Department of Environmental and Biological Sciences, University of Eastern Finland, Kuopio, Finland
- Département de géographie, Université de Montréal, Montréal, QC, Canada
| | - Christina Biasi
- Department of Environmental and Biological Sciences, University of Eastern Finland, Kuopio, Finland
| | - Oliver Sonnentag
- Département de géographie, Université de Montréal, Montréal, QC, Canada
| | - Frans-Jan W Parmentier
- Department of Physical Geography and Ecosystem Science, Lund University, Lund, Sweden
- Centre for Biogeochemistry in the Anthropocene, Department of Geosciences, University of Oslo, Oslo, Norway
| | - Masahito Ueyama
- Graduate School of Life and Environmental Sciences, Osaka Prefecture University, Sakai, Japan
| | - Gerardo Celis
- Agronomy Department, University of Florida, Gainesville, FL, USA
| | - Vincent L St Louis
- Department of Biological Sciences, University of Alberta, Edmonton, AB, Canada
| | - Craig A Emmerton
- Department of Biological Sciences, University of Alberta, Edmonton, AB, Canada
| | - Matthias Peichl
- Department of Forest Ecology and Management, Swedish University of Agricultural Sciences, Umeå, Sweden
| | - Jinshu Chi
- Department of Forest Ecology and Management, Swedish University of Agricultural Sciences, Umeå, Sweden
| | - Järvi Järveoja
- Department of Forest Ecology and Management, Swedish University of Agricultural Sciences, Umeå, Sweden
| | - Mats B Nilsson
- Department of Forest Ecology and Management, Swedish University of Agricultural Sciences, Umeå, Sweden
| | - Steven F Oberbauer
- Department of Biological Sciences, Florida International University, Miami, FL, USA
| | | | - Sang-Jong Park
- Division of Atmospheric Sciences, Korea Polar Research Institute, Incheon, Republic of Korea
| | - Han Dolman
- Department of Earth Sciences, Free University Amsterdam, Amsterdam, the Netherlands
| | - Ivan Mammarella
- Institute for Atmospheric and Earth System Research/Physics, Faculty of Science, University of Helsinki, Helsinki, Finland
| | - Namyi Chae
- Institute of Life Science and Natural Resources, Korea University, Seoul, Republic of Korea
| | - Rafael Poyatos
- CREAF, Catalonia, Spain
- Universitat Autònoma de Barcelona, Catalonia, Spain
| | - Efrén López-Blanco
- Department of Environment and Minerals, Greenland Institute of Natural Resources, Nuuk, Greenland
- Department of Bioscience, Arctic Research Center, Aarhus University, Roskilde, Denmark
| | | | - Min Jung Kwon
- Laboratoire des Sciences du Climat et de l'Environnement, Gif-sur-Yvette, France
- Division of Life Sciences, Korea Polar Research Institute, Incheon, Republic of Korea
| | - Torsten Sachs
- GFZ German Research Centre for Geosciences, Potsdam, Germany
| | - David Holl
- Center for Earth System Research and Sustainability (CEN), University of Hamburg, Hamburg, Germany
| | - Miska Luoto
- Department of Geosciences and Geography, Faculty of Science, University of Helsinki, Helsinki, Finland
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13
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Bond‐Lamberty B, Christianson DS, Malhotra A, Pennington SC, Sihi D, AghaKouchak A, Anjileli H, Altaf Arain M, Armesto JJ, Ashraf S, Ataka M, Baldocchi D, Andrew Black T, Buchmann N, Carbone MS, Chang S, Crill P, Curtis PS, Davidson EA, Desai AR, Drake JE, El‐Madany TS, Gavazzi M, Görres C, Gough CM, Goulden M, Gregg J, Gutiérrez del Arroyo O, He J, Hirano T, Hopple A, Hughes H, Järveoja J, Jassal R, Jian J, Kan H, Kaye J, Kominami Y, Liang N, Lipson D, Macdonald CA, Maseyk K, Mathes K, Mauritz M, Mayes MA, McNulty S, Miao G, Migliavacca M, Miller S, Miniat CF, Nietz JG, Nilsson MB, Noormets A, Norouzi H, O’Connell CS, Osborne B, Oyonarte C, Pang Z, Peichl M, Pendall E, Perez‐Quezada JF, Phillips CL, Phillips RP, Raich JW, Renchon AA, Ruehr NK, Sánchez‐Cañete EP, Saunders M, Savage KE, Schrumpf M, Scott RL, Seibt U, Silver WL, Sun W, Szutu D, Takagi K, Takagi M, Teramoto M, Tjoelker MG, Trumbore S, Ueyama M, Vargas R, Varner RK, Verfaillie J, Vogel C, Wang J, Winston G, Wood TE, Wu J, Wutzler T, Zeng J, Zha T, Zhang Q, Zou J. COSORE: A community database for continuous soil respiration and other soil-atmosphere greenhouse gas flux data. GLOBAL CHANGE BIOLOGY 2020; 26:7268-7283. [PMID: 33026137 PMCID: PMC7756728 DOI: 10.1111/gcb.15353] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/08/2020] [Revised: 09/04/2020] [Accepted: 09/04/2020] [Indexed: 05/07/2023]
Abstract
Globally, soils store two to three times as much carbon as currently resides in the atmosphere, and it is critical to understand how soil greenhouse gas (GHG) emissions and uptake will respond to ongoing climate change. In particular, the soil-to-atmosphere CO2 flux, commonly though imprecisely termed soil respiration (RS ), is one of the largest carbon fluxes in the Earth system. An increasing number of high-frequency RS measurements (typically, from an automated system with hourly sampling) have been made over the last two decades; an increasing number of methane measurements are being made with such systems as well. Such high frequency data are an invaluable resource for understanding GHG fluxes, but lack a central database or repository. Here we describe the lightweight, open-source COSORE (COntinuous SOil REspiration) database and software, that focuses on automated, continuous and long-term GHG flux datasets, and is intended to serve as a community resource for earth sciences, climate change syntheses and model evaluation. Contributed datasets are mapped to a single, consistent standard, with metadata on contributors, geographic location, measurement conditions and ancillary data. The design emphasizes the importance of reproducibility, scientific transparency and open access to data. While being oriented towards continuously measured RS , the database design accommodates other soil-atmosphere measurements (e.g. ecosystem respiration, chamber-measured net ecosystem exchange, methane fluxes) as well as experimental treatments (heterotrophic only, etc.). We give brief examples of the types of analyses possible using this new community resource and describe its accompanying R software package.
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Affiliation(s)
- Ben Bond‐Lamberty
- Pacific Northwest National LaboratoryJoint Global Change Research Institute at the University of Maryland–College ParkCollege ParkMDUSA
| | | | - Avni Malhotra
- Department of Earth System ScienceStanford UniversityStanfordCAUSA
| | - Stephanie C. Pennington
- Pacific Northwest National LaboratoryJoint Global Change Research Institute at the University of Maryland–College ParkCollege ParkMDUSA
| | - Debjani Sihi
- Climate Change Science Institute and Environmental Sciences DivisionOak Ridge National LaboratoryOak RidgeTNUSA
- Present address:
Department of Environmental SciencesEmory UniversityAtlantaGAUSA
| | - Amir AghaKouchak
- Department of Civil and Environmental EngineeringUniversity of California IrvineIrvineCAUSA
| | - Hassan Anjileli
- Department of Civil and Environmental EngineeringUniversity of California IrvineIrvineCAUSA
| | - M. Altaf Arain
- School of Geography and Earth SciencesMcMaster UniversityHamiltonOntarioCanada
| | - Juan J. Armesto
- Departamento de EcologíaPontificia Universidad Católica de ChileSantiagoChile
- Instituto de Ecología y BiodiversidadSantiagoChile
| | - Samaneh Ashraf
- Department of Building, Civil and Environmental EngineeringConcordia UniversityMontrealQCCanada
| | - Mioko Ataka
- Research Institute for Sustainable HumanosphereKyoto UniversityUji CityKyotoJapan
| | - Dennis Baldocchi
- Department of Environmental Science, Policy, and ManagementUniversity of CaliforniaBerkeleyCAUSA
| | - Thomas Andrew Black
- Faculty of Land and Food SystemsUniversity of British ColumbiaVancouverBCCanada
| | - Nina Buchmann
- Department of Environmental Systems ScienceInstitute of Agricultural SciencesETH ZurichZurichSwitzerland
| | - Mariah S. Carbone
- Center for Ecosystem Science and SocietyNorthern Arizona UniversityFlagstaffAZUSA
| | - Shih‐Chieh Chang
- Department of Natural Resources and Environmental StudiesCenter for Interdisciplinary Research on Ecology and SustainabilityNational Dong Hwa UniversityHualienTaiwan
| | - Patrick Crill
- Department of Geological Sciences and Bolin Centre for Climate ResearchStockholm UniversityStockholmSweden
| | - Peter S. Curtis
- Department of Evolution, Ecology and Organismal BiologyOhio State UniversityColumbusOHUSA
| | - Eric A. Davidson
- Appalachian LaboratoryUniversity of Maryland Center for Environmental ScienceFrostburgMDUSA
| | - Ankur R. Desai
- Department of Atmospheric and Oceanic SciencesUniversity of Wisconsin‐MadisonMadisonWIUSA
| | - John E. Drake
- Sustainable Resources ManagementSUNY‐ESFSyracuseNYUSA
| | | | - Michael Gavazzi
- Eastern Forest Environmental Threat Assessment CenterUSDA Forest ServiceResearch Triangle ParkNCUSA
| | | | | | | | - Jillian Gregg
- Sustainability Double Degree ProgramOregon State UniversityCorvallisORUSA
| | | | - Jin‐Sheng He
- Institute of EcologyCollege of Urban and Environmental SciencesPeking UniversityBeijingChina
| | - Takashi Hirano
- Research Faculty of AgricultureHokkaido UniversitySapporoJapan
| | - Anya Hopple
- Pacific Northwest National LaboratoryRichlandWAUSA
- Smithsonian Environmental Research CenterEdgewaterMDUSA
| | - Holly Hughes
- School of Forest ResourcesUniversity of MaineOronoMEUSA
| | - Järvi Järveoja
- Department of Forest Ecology and ManagementSwedish University of Agricultural SciencesUmeåSweden
| | - Rachhpal Jassal
- Faculty of Land and Food SystemsUniversity of British ColumbiaVancouverBCCanada
| | - Jinshi Jian
- Pacific Northwest National LaboratoryJoint Global Change Research Institute at the University of Maryland–College ParkCollege ParkMDUSA
| | - Haiming Kan
- Beijing Research & Development Centre for Grass and EnvironmentBeijing Academy of Agriculture and Forestry SciencesBeijingChina
| | - Jason Kaye
- The Pennsylvania State UniversityUniversity ParkPAUSA
| | - Yuji Kominami
- Forestry and Forest Products Research InstituteTsukuba‐cityJapan
| | - Naishen Liang
- Center for Global Environmental ResearchNational Institute for Environmental StudiesTsukubaJapan
| | - David Lipson
- Biology DepartmentSan Diego State UniversitySan DiegoCAUSA
| | - Catriona A. Macdonald
- Hawkesbury Institute for the EnvironmentWestern Sydney UniversityPenrithNSWAustralia
| | - Kadmiel Maseyk
- School of Environment, Earth and Ecosystem SciencesThe Open UniversityMilton KeynesUK
| | - Kayla Mathes
- Integrated Life SciencesVirginia Commonwealth UniversityRichmondVAUSA
| | | | - Melanie A. Mayes
- Climate Change Science Institute and Environmental Sciences DivisionOak Ridge National LaboratoryOak RidgeTNUSA
| | - Steve McNulty
- Eastern Forest Environmental Threat Assessment CenterUSDA Forest ServiceResearch Triangle ParkNCUSA
| | - Guofang Miao
- School of Geographical SciencesFujian Normal UniversityFuzhouP.R. China
| | | | - Scott Miller
- University at AlbanyState University of New YorkNew YorkNYUSA
| | - Chelcy F. Miniat
- USDA Forest ServiceSouthern Research StationCoweeta Hydrologic LabOttoNCUSA
| | - Jennifer G. Nietz
- Department of Evolution, Ecology and Organismal BiologyOhio State UniversityColumbusOHUSA
| | - Mats B. Nilsson
- Department of Forest Ecology and ManagementSwedish University of Agricultural SciencesUmeåSweden
| | - Asko Noormets
- Department of Ecology and Conservation BiologyTexas A&M UniversityCollege StationTXUSA
| | - Hamidreza Norouzi
- New York City College of Technology and the Graduate CenterThe City University of New YorkNew YorkNYUSA
| | - Christine S. O’Connell
- Department of Environmental Science, Policy, and ManagementUniversity of CaliforniaBerkeleyCAUSA
- Department of Environmental StudiesMacalester CollegeSt PaulMNUSA
| | - Bruce Osborne
- UCD School of Biology and Environmental Science and UCD Earth InstituteUniversity College DublinDublinIreland
| | | | - Zhuo Pang
- Beijing Research & Development Centre for Grass and EnvironmentBeijing Academy of Agriculture and Forestry SciencesBeijingChina
| | - Matthias Peichl
- Department of Forest Ecology and ManagementSwedish University of Agricultural SciencesUmeåSweden
| | - Elise Pendall
- Hawkesbury Institute for the EnvironmentWestern Sydney UniversityPenrithNSWAustralia
| | - Jorge F. Perez‐Quezada
- Department of Environmental Science and Renewable Natural ResourcesUniversity of ChileSantiagoChile
- Institute of Ecology and BiodiversitySantiagoChile
| | - Claire L. Phillips
- USDA Agricultural Research ServiceForage Seed and Cereal Research UnitCorvallisORUSA
| | | | - James W. Raich
- Department of Ecology, Evolution & Organismal BiologyIowa State UniversityAmesIAUSA
| | - Alexandre A. Renchon
- Hawkesbury Institute for the EnvironmentWestern Sydney UniversityPenrithNSWAustralia
| | - Nadine K. Ruehr
- Institute of Meteorology and Climate Research–Atmospheric Environmental ResearchKIT‐Campus AlpinKarlsruhe Institute of TechnologyGarmisch‐PartenkirchenGermany
| | | | - Matthew Saunders
- School of Natural SciencesBotany DepartmentTrinity College DublinDublinIreland
| | | | | | | | - Ulli Seibt
- Department of Atmospheric and Oceanic SciencesUniversity of California Los AngelesLos AngelesCAUSA
| | - Whendee L. Silver
- Department of Environmental Science, Policy, and ManagementUniversity of CaliforniaBerkeleyCAUSA
| | - Wu Sun
- Department of Global EcologyCarnegie Institution for ScienceStanfordCAUSA
| | - Daphne Szutu
- Department of Environmental Science, Policy, and ManagementUniversity of CaliforniaBerkeleyCAUSA
| | - Kentaro Takagi
- Field Science Center for Northern BiosphereHokkaido UniversityHoronobeJapan
| | | | - Munemasa Teramoto
- Center for Global Environmental ResearchNational Institute for Environmental StudiesTsukubaJapan
- Present address:
Arid Land Research CenterTottori UniversityTottori680–0001Japan
| | - Mark G. Tjoelker
- Hawkesbury Institute for the EnvironmentWestern Sydney UniversityPenrithNSWAustralia
| | | | - Masahito Ueyama
- Graduate School of Life and Environmental SciencesOsaka Prefecture UniversitySakaiJapan
| | - Rodrigo Vargas
- Department of Plant and Soil SciencesUniversity of DelawareNewarkDEUSA
| | - Ruth K. Varner
- Department of Earth Sciences and Institute for the Study of Earth, Oceans and SpaceUniversity of New HampshireDurhamNHUSA
| | - Joseph Verfaillie
- Department of Environmental Science, Policy, and ManagementUniversity of CaliforniaBerkeleyCAUSA
| | | | - Jinsong Wang
- Key Laboratory of Ecosystem Network Observation and ModelingInstitute of Geographic Sciences and Natural Resources ResearchChinese Academy of SciencesBeijingChina
| | - Greg Winston
- Department of Science, Engineering and MathematicsCypress CollegeCypressCAUSA
| | - Tana E. Wood
- USDA Forest Service International Institute of Tropical ForestryRío PiedrasPuerto Rico
| | - Juying Wu
- Beijing Research & Development Centre for Grass and EnvironmentBeijing Academy of Agriculture and Forestry SciencesBeijingChina
| | | | - Jiye Zeng
- Center for Global Environmental ResearchNational Institute for Environmental StudiesTsukubaJapan
| | - Tianshan Zha
- School of Soil and Water ConservationBeijing Forestry UniversityBeijingP.R. China
| | - Quan Zhang
- State Key Laboratory of Water Resources and Hydropower Engineering ScienceWuhan UniversityWuhanP.R. China
| | - Junliang Zou
- Beijing Research & Development Centre for Grass and EnvironmentBeijing Academy of Agriculture and Forestry SciencesBeijingChina
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14
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Järveoja J, Nilsson MB, Crill PM, Peichl M. Bimodal diel pattern in peatland ecosystem respiration rebuts uniform temperature response. Nat Commun 2020; 11:4255. [PMID: 32848144 PMCID: PMC7449960 DOI: 10.1038/s41467-020-18027-1] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/24/2020] [Accepted: 07/29/2020] [Indexed: 11/26/2022] Open
Abstract
Accurate projections of climate change impacts on the vast carbon stores of northern peatlands require detailed knowledge of ecosystem respiration (ER) and its heterotrophic (Rh) and autotrophic (Ra) components. Currently, however, standard flux measurement techniques, i.e. eddy covariance and manual chambers, generate empirical ER data during only night- or daytime, respectively, which are extrapolated to the daily scale based on the paradigm that assumes a uniform diel temperature response. Here, using continuous autochamber measurements, we demonstrate a distinct bimodal pattern in diel peatland ER which contrasts the unimodal pattern inherent to the classical assumption. This feature results from divergent temperature dependencies of day- and nighttime ER due to varying contributions from Rh and Ra. We further find that disregarding these bimodal dynamics causes significant bias in ER estimates across multiple temporal scales. This calls for improved process-based understanding of ER to advance our ability to simulate peatland carbon cycle-climate feedbacks. Predicting the fate of carbon in peatlands relies on assumptions of behaviour in response to temperature. Here, the authors show that the temperature dependency of respiratory carbon losses shift strongly over day-night cycles, an overlooked facet causing bias in peatland carbon cycle simulations.
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Affiliation(s)
- Järvi Järveoja
- Department of Forest Ecology & Management, Swedish University of Agricultural Sciences, Umeå, Sweden.
| | - Mats B Nilsson
- Department of Forest Ecology & Management, Swedish University of Agricultural Sciences, Umeå, Sweden
| | - Patrick M Crill
- Department of Geological Sciences, Stockholm University, Stockholm, Sweden.,Bolin Centre for Climate Research, Stockholm, Sweden
| | - Matthias Peichl
- Department of Forest Ecology & Management, Swedish University of Agricultural Sciences, Umeå, Sweden
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15
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Koebsch F, Sonnentag O, Järveoja J, Peltoniemi M, Alekseychik P, Aurela M, Arslan AN, Dinsmore K, Gianelle D, Helfter C, Jackowicz-Korczynski M, Korrensalo A, Leith F, Linkosalmi M, Lohila A, Lund M, Maddison M, Mammarella I, Mander Ü, Minkkinen K, Pickard A, Pullens JWM, Tuittila ES, Nilsson MB, Peichl M. Refining the role of phenology in regulating gross ecosystem productivity across European peatlands. GLOBAL CHANGE BIOLOGY 2020; 26:876-887. [PMID: 31686431 DOI: 10.1111/gcb.14905] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/04/2019] [Revised: 09/20/2019] [Accepted: 10/09/2019] [Indexed: 06/10/2023]
Abstract
The role of plant phenology as a regulator for gross ecosystem productivity (GEP) in peatlands is empirically not well constrained. This is because proxies to track vegetation development with daily coverage at the ecosystem scale have only recently become available and the lack of such data has hampered the disentangling of biotic and abiotic effects. This study aimed at unraveling the mechanisms that regulate the seasonal variation in GEP across a network of eight European peatlands. Therefore, we described phenology with canopy greenness derived from digital repeat photography and disentangled the effects of radiation, temperature and phenology on GEP with commonality analysis and structural equation modeling. The resulting relational network could not only delineate direct effects but also accounted for possible effect combinations such as interdependencies (mediation) and interactions (moderation). We found that peatland GEP was controlled by the same mechanisms across all sites: phenology constituted a key predictor for the seasonal variation in GEP and further acted as a distinct mediator for temperature and radiation effects on GEP. In particular, the effect of air temperature on GEP was fully mediated through phenology, implying that direct temperature effects representing the thermoregulation of photosynthesis were negligible. The tight coupling between temperature, phenology and GEP applied especially to high latitude and high altitude peatlands and during phenological transition phases. Our study highlights the importance of phenological effects when evaluating the future response of peatland GEP to climate change. Climate change will affect peatland GEP especially through changing temperature patterns during plant phenologically sensitive phases in high latitude and high altitude regions.
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Affiliation(s)
- Franziska Koebsch
- Department of Forest Ecology and Management, Swedish University of Agricultural Sciences, Umeå, Sweden
- Department for Landscape Ecology and Site Evaluation, University of Rostock, Rostock, Germany
| | - Oliver Sonnentag
- Département de géographie and Centre d'études nordiques, Université de Montréal, Montréal, Canada
| | - Järvi Järveoja
- Department of Forest Ecology and Management, Swedish University of Agricultural Sciences, Umeå, Sweden
| | | | - Pavel Alekseychik
- Natural Resources Institute Finland (Luke), Helsinki, Finland
- Institute for Atmospheric and Earth System Research (INAR), University of Helsinki, Helsinki, Finland
| | - Mika Aurela
- Finnish Meteorological Institute, Helsinki, Finland
| | | | | | - Damiano Gianelle
- Department of Sustainable Agro-ecosystems and Bioresources, Research and Innovation Centre, Fondazione Edmund Mach, San Michele all'Adige, Italy
| | | | - Marcin Jackowicz-Korczynski
- Department of Bioscience, Aarhus University, Roskilde, Denmark
- Department of Physical Geography and Ecosystem Science, Lund University, Lund, Sweden
| | - Aino Korrensalo
- School of Forest Sciences, University of Eastern Finland, Joensuu, Finland
| | | | | | - Annalea Lohila
- Institute for Atmospheric and Earth System Research (INAR), University of Helsinki, Helsinki, Finland
- Finnish Meteorological Institute, Helsinki, Finland
| | - Magnus Lund
- Department of Bioscience, Aarhus University, Roskilde, Denmark
| | - Martin Maddison
- Department of Geography, University of Tartu, Tartu, Estonia
| | - Ivan Mammarella
- Natural Resources Institute Finland (Luke), Helsinki, Finland
| | - Ülo Mander
- Department of Geography, University of Tartu, Tartu, Estonia
| | - Kari Minkkinen
- Department of Forest Sciences, University of Helsinki, Helsinki, Finland
| | - Amy Pickard
- Centre for Ecology and Hydrology, Edinburgh, UK
| | - Johannes W M Pullens
- Department of Sustainable Agro-ecosystems and Bioresources, Research and Innovation Centre, Fondazione Edmund Mach, San Michele all'Adige, Italy
- Hydromet, Department of Civil and Environmental Engineering and Environmental Research Institute, University College Cork, Cork, Ireland
- Department of Agroecology, Aarhus University, Tjele, Denmark
| | | | - Mats B Nilsson
- Department of Forest Ecology and Management, Swedish University of Agricultural Sciences, Umeå, Sweden
| | - Matthias Peichl
- Department of Forest Ecology and Management, Swedish University of Agricultural Sciences, Umeå, Sweden
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16
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Yan T, Song H, Wang Z, Teramoto M, Wang J, Liang N, Ma C, Sun Z, Xi Y, Li L, Peng S. Temperature sensitivity of soil respiration across multiple time scales in a temperate plantation forest. THE SCIENCE OF THE TOTAL ENVIRONMENT 2019; 688:479-485. [PMID: 31254813 DOI: 10.1016/j.scitotenv.2019.06.318] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/18/2019] [Revised: 06/20/2019] [Accepted: 06/20/2019] [Indexed: 06/09/2023]
Abstract
Soil respiration (Rs) is the largest carbon (C) flux from terrestrial ecosystems to the atmosphere. Predictions of Rs and associated feedback to climate change remain largely uncertain, in part due to the high temporal heterogeneity of temperature sensitivity (apparent Q10) of Rs under a changing climate. Therefore, it is of critical importance to provide better insight into how Q10 varies across multiple temporal scales. We investigated the diurnal, seasonal, and annual variabilities in the Q10 of Rs using continuous Rs measurements (at hourly intervals) over six growing seasons in a mature temperate larch plantation in North China. We found that night-time values of Q10 were slightly lower than daytime values. Large seasonal and annual fluctuations of Q10 were observed, as illustrated by high coefficients of variation of 15.0% and 21.8%, respectively. The higher Q10 in spring and autumn were primarily regulated by fine root growth and higher soil moisture after snow melt in spring, and leaf senescence in autumn. Lower Q10 in summer may have been caused by limitations in substrate availability and microbial activity resulting from drought, which also caused a decoupling of Rs from soil temperature in summer. Furthermore, a bivariate nonlinear model incorporating both soil temperature and soil moisture best explained Q10 variability. Generally, lower soil temperature and higher soil moisture lead to higher values of Q10, indicating that climate warming could exert a negative effect on Q10, partially offsetting the warming-induced increase in soil C loss. We provide long-term field experimental evidence that it would be inappropriate to estimate Rs on a multiyear scale using a fixed Q10 value or a value obtained from one season and/or one year. Thus, we emphasize the importance of incorporating the seasonal and annual heterogeneities of Q10 into C cycle model simulations under future climate change scenarios.
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Affiliation(s)
- Tao Yan
- Sino-French Institute for Earth System Science, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China
| | - Huanhuan Song
- CAS Key Laboratory of Forest Ecology and Management, Institute of Applied Ecology, Shenyang 110016, China; University of Chinese Academy of Sciences, Beijing 100049, China
| | - Zhaoqi Wang
- Sino-French Institute for Earth System Science, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China
| | - Munemasa Teramoto
- Center for Global Environmental Research, National Institute for Environmental Studies, Tsukuba, Ibaraki 305-8506, Japan
| | - Jinsong Wang
- Key Laboratory of Ecosystem Network Observation and Modeling, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China
| | - Naishen Liang
- Center for Global Environmental Research, National Institute for Environmental Studies, Tsukuba, Ibaraki 305-8506, Japan
| | - Chao Ma
- Sino-French Institute for Earth System Science, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China
| | - Zhenzhong Sun
- Sino-French Institute for Earth System Science, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China
| | - Yi Xi
- Sino-French Institute for Earth System Science, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China
| | - Lili Li
- Sino-French Institute for Earth System Science, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China
| | - Shushi Peng
- Sino-French Institute for Earth System Science, College of Urban and Environmental Sciences, Peking University, Beijing 100871, China.
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17
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Varying Vegetation Composition, Respiration and Photosynthesis Decrease Temporal Variability of the CO2 Sink in a Boreal Bog. Ecosystems 2019. [DOI: 10.1007/s10021-019-00434-1] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Abstract
We quantified the role of spatially varying vegetation composition in seasonal and interannual changes in a boreal bog’s CO2 uptake. We divided the spatially heterogeneous site into six microform classes based on plant species composition and measured their net ecosystem exchange (NEE) using chamber method over the growing seasons in 2012–2014. A nonlinear mixed-effects model was applied to assess how the contributions of microforms with different vegetation change temporally, and to upscale NEE to the ecosystem level to be compared with eddy covariance (EC) measurements. Both ecosystem respiration (R) and gross photosynthesis (PG) were the largest in high hummocks, 894–964 (R) and 969–1132 (PG) g CO2 m−2 growing season−1, and decreased toward the wetter microforms. NEE had a different spatial pattern than R and PG; the highest cumulative seasonal CO2 sink was found in lawns in all years (165–353 g CO2 m−2). Microforms with similar wetness but distinct vegetation had different NEE, highlighting the importance of vegetation composition in regulating CO2 sink. Chamber-based ecosystem-level NEE was smaller and varied less interannually than the EC-derived estimate, indicating a need for further research on the error sources of both methods. Lawns contributed more to ecosystem-level NEE (55–78%) than their areal cover within the site (21.5%). In spring and autumn, lawns had the highest NEE, whereas in midsummer differences among microforms were small. The contributions of all microforms to the ecosystem-level NEE varied seasonally and interannually, suggesting that spatially heterogeneous vegetation composition could make bog CO2 uptake temporally more stable.
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18
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Laine AM, Mäkiranta P, Laiho R, Mehtätalo L, Penttilä T, Korrensalo A, Minkkinen K, Fritze H, Tuittila ES. Warming impacts on boreal fen CO 2 exchange under wet and dry conditions. GLOBAL CHANGE BIOLOGY 2019; 25:1995-2008. [PMID: 30854735 DOI: 10.1111/gcb.14617] [Citation(s) in RCA: 25] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/01/2018] [Revised: 01/11/2019] [Accepted: 02/21/2019] [Indexed: 05/14/2023]
Abstract
Northern peatlands form a major soil carbon (C) stock. With climate change, peatland C mineralization is expected to increase, which in turn would accelerate climate change. A particularity of peatlands is the importance of soil aeration, which regulates peatland functioning and likely modulates the responses to warming climate. Our aim is to assess the impacts of warming on a southern boreal and a sub-arctic sedge fen carbon dioxide (CO2 ) exchange under two plausible water table regimes: wet and moderately dry. We focused this study on minerotrophic treeless sedge fens, as they are common peatland types at boreal and (sub)arctic areas, which are expected to face the highest rates of climate warming. In addition, fens are expected to respond to environmental changes faster than the nutrient poor bogs. Our study confirmed that CO2 exchange is more strongly affected by drying than warming. Experimental water level draw-down (WLD) significantly increased gross photosynthesis and ecosystem respiration. Warming alone had insignificant impacts on the CO2 exchange components, but when combined with WLD it further increased ecosystem respiration. In the southern fen, CO2 uptake decreased due to WLD, which was amplified by warming, while at northern fen it remained stable. As a conclusion, our results suggest that a very small difference in the WLD may be decisive, whether the C sink of a fen decreases, or whether the system is able to adapt within its regime and maintain its functions. Moreover, the water table has a role in determining how much the increased temperature impacts the CO2 exchange.
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Affiliation(s)
- Anna M Laine
- School of Forest Sciences, University of Eastern Finland, Joensuu, Finland
| | | | - Raija Laiho
- Natural Resources Institute Finland, Helsinki, Finland
| | - Lauri Mehtätalo
- School of Computing, University of Eastern Finland, Joensuu, Finland
| | - Timo Penttilä
- Natural Resources Institute Finland, Helsinki, Finland
| | - Aino Korrensalo
- School of Forest Sciences, University of Eastern Finland, Joensuu, Finland
| | - Kari Minkkinen
- Department of Forest Sciences, University of Helsinki, Helsinki, Finland
| | - Hannu Fritze
- Natural Resources Institute Finland, Helsinki, Finland
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