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Professor Iain Hartley

Professor Iain Hartley

Professor of Terrestrial Ecosystem Science

 4362

 Amory C418

 

Amory Building, University of Exeter, Rennes Drive, Exeter, EX4 4RJ , UK

Overview

Iain Hartley's research focuses on the responses of terrestrial ecosystems to global change. He has worked in a wide range of ecosystems, from Arctic tundra to tropical rainforests. In particular, his research interests include: 1) determining the effects of permafrost thaw on greenhouse gas emissions from high-latitude ecosystems; 2) investigating the extent to which tropical forest productivity is limited by nutrient availability versus atmospheric CO2 concentrations; 3) quantifying the effects of global warming on soil and ecosystem carbon storage. Iain's research has been funded by the Natural Environment Research Council (NERC) and the UK Department of Energy and Climate Change (DECC), and he sits on the scientific steering committte of the AmazonFACE project, which will be the first experiment to expose a mature rainforest canopy to elevated CO2. He also currently serves on the NERC Radiocarbon Facility steering committee.

Broad research specialisms:

Carbon cycle feedbacks to global change, impacts of warming on soil carbon dynamics, links between carbon and nutrient cycling, permafrost carbon dynamics, elevated atmospheric CO2 concentrations, methane fluxes, managing the terrestrial carbon cycle.

Qualifications

BSc Environmental Biology (University of St Andrews),
MRes Ecology and Environmental Biology (University of York),
PhD “The response of soil respiration to temperature” (University of York)

Research group links

Research

Research interests

The main focus of my research is on improving understanding of how the terrestrial biosphere will respond to global change, and what the implications will be for future rates of climate change.

I am primarily an experimental ecologist, using manipulations to quantify ecosystem responses to key drivers, but also make use of natural gradients and natural disturbances to test hypotheses related to global change. My research combines controlled laboratory experiments with field measurements in ecosystems as diverse as Arctic tundra and Amazon rainforest. I make extensive use of stable and radiocarbon isotopes to compliment measurements of fluxes (CO2, CH4) and stores of carbon in different ecosystems. My work is highly collaborative with ongoing projects involving hydrologists, plant physiologists, microbiologists, remote sensors, and soil scientists, as well as ecosystem and Earth system modellers.

Current projects include: 1) investigating how soil microbial community responses may modify the effects of temperature on decomposition rates in soils; 2) determining the role of plant biodiversity and fire disturbance in controlling the rates, and implications, of permafrost thaw in contrasting ecosystems in northern Canada; 3) quantifying the role of nutrient availability in controlling the productivity of Amazon forests; 4) investigating the potential effects of atmospheric CO2 concentration on C uptake in rainforests.


Specific research areas:
1.    Effects of temperature on decomposition rates in soils
2.    Elevated CO2 effects on plant productivity and ecosystem C storage
3.    Plant-soil interactions and nutrient-cycle influences on carbon-cycle feedbacks
4.    Permafrost carbon dynamics
5.    Methane fluxes in terrestrial ecosystems
6.    Soil microbial community responses to global change
7.    The use of radiocarbon in carbon cycle research

Research projects

Research grants

  • 2016 NERC
    Phosphorus Limitation And ecosystem responses to Carbon dioxide Enrichment (PLACE)
  • 2015 NERC
    SPECTRA: Soil Processes and Ecological Services in the Karst Critical Zone of Southwest China
  • 2014 NERC
    The Amazon Fertilisation Experiment (AFEX)
  • 2014 InterAmerican Development Bank
    Amazon FACE experiment
  • 2013 DECC
    Determining the role of permafrost thaw in controlling rates of methane release from terrestrial high-latitude ecosystems
  • 2012 NERC
    CYCLOPS: Carbon Cycling Linkages of Permafrost Systems: NERC Arctic Research Programme award
  • 2010 NERC
    Thermal acclimation of soil microbial respiration: consequences for global-warming-induced carbon losses?

Publications

Key publications | Publications by category | Publications by year

Key publications


Hartley IP, Hill TC, Wade TJ, Clement RJ, Moncrieff JB, Prieto-Blanco A, Disney MI, Huntley B, Williams M, Howden NJK, et al (2015). Quantifying landscape-level methane fluxes in subarctic Finland using a multiscale approach. Global Change Biology, 21(10), 3712-3725. Abstract.  Full text.
Karhu K, Auffret MD, Dungait JAJ, Hopkins DW, Prosser JI, Singh BK, Subke J-A, Wookey PA, Agren GI, Sebastià M-T, et al (2014). Temperature sensitivity of soil respiration rates enhanced by microbial community response. Nature, 513(7516), 81-84. Abstract.  Author URL.  Full text.
Hartley I, Garnett MH, Sommerkorn M, Hopkins DW, Fletcher BJ, Sloan VL, Phoenix GK, Wookey PA (2013). A potential loss of carbon associated with greater plant growth in the European Arctic. Nature Climate Change, 2, 875-879.
Hartley IP, Hopkins DW, Garnett MH, Sommerkorn M, Wookey PA (2008). Soil microbial respiration in arctic soil does not acclimate to temperature. Ecol Lett, 11(10), 1092-1100. Abstract.  Author URL.
Hartley IP, Ineson P (2008). Substrate quality and the temperature sensitivity of soil organic matter decomposition. Soil Biology and Biochemistry, 40(7), 1567-1574. Abstract.  Full text.
Heinemeyer A, Hartley IP, Evans SP, Carreira De La Fuente JA, Ineson P (2007). Forest soil CO<inf>2</inf>flux: Uncovering the contribution and environmental responses of ectomycorrhizas. Global Change Biology, 13(8), 1786-1797. Abstract.

Publications by category


Journal articles

Gatis N, Anderson K, Grand-Clement E, Luscombe D, Hartley I, Smith D, Brazier R (In Press). Evaluating MODIS vegetation products using digital images for quantifying local peatland CO2 gas fluxes. Remote Sensing in Ecology and Conservation Full text.
Gatis N, Luscombe D, Grand-Clement E, Hartley I, Anderson K, Smith DM, Brazier RE (In Press). The effect of drainage ditches on vegetation diversity and CO2 fluxes in a Molinia caerulea dominated peatland. Ecohydrology Full text.
Fisher JP, Estop-Aragonés C, Thierry A, Charman DJ, Wolfe SA, Hartley IP, Murton JB, Williams M, Phoenix GK (In Press). The influence of vegetation and soil characteristics on active-layer thickness of permafrost soils in boreal forest. Glob Chang Biol, 22(9), 3127-3140. Abstract.  Author URL.  Full text.
Lopez-Sangil L, Hartley IP, Rovira P, Casals P, Sayer EJ (2018). Drying and rewetting conditions differentially affect the mineralization of fresh plant litter and extant soil organic matter. Soil Biology and Biochemistry, 124, 81-89. Abstract.  Full text.
Estop-Aragonés C, Cooper MDA, Fisher JP, Thierry A, Garnett MH, Charman DJ, Murton JB, Phoenix GK, Treharne R, Sanderson NK, et al (2018). Limited release of previously-frozen C and increased new peat formation after thaw in permafrost peatlands. Soil Biology and Biochemistry, 118, 115-129. Abstract.  Full text.
Cooper MDA, Estop-Aragones C, Fisher JP, Thierry A, Garnett MH, Charman DJ, Murton JB, Phoenix GK, Treharne R, Kokelj SV, et al (2017). Limited contribution of permafrost carbon to methane release from thawing peatlands. Nature Climate Change, 7, 507-511. Full text.
De Baets S, Van de Weg MJ, Lewis R, Steinberg N, Meersmans J, Quine TA, Shaver GR, Hartley IP (2016). Investigating the controls on soil organic matter decomposition in tussock tundra soil and permafrost after fire. Soil Biology and Biochemistry, 99, 108-116. Abstract.  Full text.
Schädel C, Bader MK-F, Schuur EAG, Biasi C, Bracho R, Čapek P, De Baets S, Diáková K, Ernakovich J, Estop-Aragones C, et al (2016). Potential carbon emissions dominated by carbon dioxide from thawed permafrost soils. Nature Climate Change, 6(10), 950-953. Full text.
Auffret MD, Karhu K, Khachane A, Dungait JAJ, Fraser F, Hopkins DW, Wookey PA, Singh BK, Freitag TE, Hartley IP, et al (2016). The Role of Microbial Community Composition in Controlling Soil Respiration Responses to Temperature. PLoS One, 11(10). Abstract.  Author URL.  Full text.
Hartley IP, Hill TC, Wade TJ, Clement RJ, Moncrieff JB, Prieto-Blanco A, Disney MI, Huntley B, Williams M, Howden NJK, et al (2015). Quantifying landscape-level methane fluxes in subarctic Finland using a multiscale approach. Global Change Biology, 21(10), 3712-3725. Abstract.  Full text.
Laudicina VA, Benhua S, Dennis PG, Badalucco L, Rushton SP, Newsham KK, O Donnell AG, Hartley IP, Hopkins DW (2015). Responses to increases in temperature of heterotrophic micro-organisms in soils from the maritime Antarctic. Polar Biology, 38(8), 1153-1160. Abstract.
Hartley IP (2014). Soil carbon: Resisting climate change. Nature Climate Change, 4(9), 760-761.
Karhu K, Auffret MD, Dungait JAJ, Hopkins DW, Prosser JI, Singh BK, Subke J-A, Wookey PA, Agren GI, Sebastià M-T, et al (2014). Temperature sensitivity of soil respiration rates enhanced by microbial community response. Nature, 513(7516), 81-84. Abstract.  Author URL.  Full text.
Hartley I, Garnett MH, Sommerkorn M, Hopkins DW, Fletcher BJ, Sloan VL, Phoenix GK, Wookey PA (2013). A potential loss of carbon associated with greater plant growth in the European Arctic. Nature Climate Change, 2, 875-879.
Fraser FC, Hallett PD, Wookey PA, Hartley IP, Hopkins DW (2013). How do enzymes catalysing soil nitrogen transformations respond to changing temperatures?. Biology and Fertility of Soils, 49(1), 99-103. Abstract.
Hartley IP, Garnett MH, Sommerkorn M, Hopkins DW, Wookey PA (2013). The age of CO<inf>2</inf>released from soils in contrasting ecosystems during the arctic winter. Soil Biology and Biochemistry, 63, 1-4. Abstract.  Full text.
Burke EJ, Hartley I, Jones CD (2012). Uncertainties in the global temperature change caused by carbon release from permafrost thawing. The Cryosphere, 6, 1063-1076.
Garnett MH, Hartley IP (2010). A passive sampling method for radiocarbon analysis of atmospheric CO2 using molecular sieve. Atmospheric Environment, 44(7), 877-883. Abstract.
Hartley IP, Hopkins DW, Sommerkorn M, Wookey PA (2010). The response of organic matter mineralisation to nutrient and substrate additions in sub-arctic soils. Soil Biology and Biochemistry, 42(1), 92-100. Abstract.  Full text.
Garnett MH, Hartley IP, Hopkins DW, Sommerkorn M, Wookey PA (2009). A passive sampling method for radiocarbon analysis of soil respiration using molecular sieve. Soil Biology and Biochemistry, 41(7), 1450-1456. Abstract.
Wookey PA, Aerts R, Bardgett RD, Baptist F, Bråthen K, Cornelissen JHC, Gough L, Hartley IP, Hopkins DW, Lavorel S, et al (2009). Ecosystem feedbacks and cascade processes: Understanding their role in the responses of Arctic and alpine ecosystems to environmental change. Global Change Biology, 15(5), 1153-1172. Abstract.
Hartley IP, Hopkins DW, Garnett MH, Sommerkorn M, Wookey PA (2009). No evidence for compensatory thermal adaptation of soil microbial respiration in the study of Bradford et al. (2008). Ecol Lett, 12(7), E12-E14. Abstract.  Author URL.
Zaragoza-Castells J, Sánchez-Gómez D, Hartley IP, Matesanz S, Valladares F, Lloyd J, Atkin OK (2008). Climate-dependent variations in leaf respiration in a dry-land, low productivity Mediterranean forest: the importance of acclimation in both high-light and shaded habitats. Functional Ecology, 22(1), 172-184. Abstract.
Hartley IP, Hopkins DW, Garnett MH, Sommerkorn M, Wookey PA (2008). Soil microbial respiration in arctic soil does not acclimate to temperature. Ecol Lett, 11(10), 1092-1100. Abstract.  Author URL.
Hawkes CV, Hartley IP, Ineson P, Fitter AH (2008). Soil temperature affects carbon allocation within arbuscular mycorrhizal networks and carbon transport from plant to fungus. Global Change Biology, 14(5), 1181-1190. Abstract.
Hartley IP, Ineson P (2008). Substrate quality and the temperature sensitivity of soil organic matter decomposition. Soil Biology and Biochemistry, 40(7), 1567-1574. Abstract.  Full text.
Hartley IP, Heinemeyer A, Ineson P (2007). Effects of three years of soil warming and shading on the rate of soil respiration: Substrate availability and not thermal acclimation mediates observed response. Global Change Biology, 13(8), 1761-1770. Abstract.
Heinemeyer A, Hartley IP, Evans SP, Carreira De La Fuente JA, Ineson P (2007). Forest soil CO<inf>2</inf>flux: Uncovering the contribution and environmental responses of ectomycorrhizas. Global Change Biology, 13(8), 1786-1797. Abstract.
Hartley IP, Heinemeyer A, Evans SP, Ineson P (2007). The effect of soil warming on bulk soil vs. rhizosphere respiration. Global Change Biology, 13(12), 2654-2667. Abstract.
Hartley IP, Armstrong AF, Murthy R, Barron-Gafford G, Ineson P, Atkin OK (2006). The dependence of respiration on photosynthetic substrate supply and temperature: Integrating leaf, soil and ecosystem measurements. Global Change Biology, 12(10), 1954-1968. Abstract.

Publications by year


In Press

Gatis N, Anderson K, Grand-Clement E, Luscombe D, Hartley I, Smith D, Brazier R (In Press). Evaluating MODIS vegetation products using digital images for quantifying local peatland CO2 gas fluxes. Remote Sensing in Ecology and Conservation Full text.
Gatis N, Luscombe D, Grand-Clement E, Hartley I, Anderson K, Smith DM, Brazier RE (In Press). The effect of drainage ditches on vegetation diversity and CO2 fluxes in a Molinia caerulea dominated peatland. Ecohydrology Full text.
Fisher JP, Estop-Aragonés C, Thierry A, Charman DJ, Wolfe SA, Hartley IP, Murton JB, Williams M, Phoenix GK (In Press). The influence of vegetation and soil characteristics on active-layer thickness of permafrost soils in boreal forest. Glob Chang Biol, 22(9), 3127-3140. Abstract.  Author URL.  Full text.

2018

Lopez-Sangil L, Hartley IP, Rovira P, Casals P, Sayer EJ (2018). Drying and rewetting conditions differentially affect the mineralization of fresh plant litter and extant soil organic matter. Soil Biology and Biochemistry, 124, 81-89. Abstract.  Full text.
Estop-Aragonés C, Cooper MDA, Fisher JP, Thierry A, Garnett MH, Charman DJ, Murton JB, Phoenix GK, Treharne R, Sanderson NK, et al (2018). Limited release of previously-frozen C and increased new peat formation after thaw in permafrost peatlands. Soil Biology and Biochemistry, 118, 115-129. Abstract.  Full text.

2017

Cooper MDA, Estop-Aragones C, Fisher JP, Thierry A, Garnett MH, Charman DJ, Murton JB, Phoenix GK, Treharne R, Kokelj SV, et al (2017). Limited contribution of permafrost carbon to methane release from thawing peatlands. Nature Climate Change, 7, 507-511. Full text.

2016

De Baets S, Van de Weg MJ, Lewis R, Steinberg N, Meersmans J, Quine TA, Shaver GR, Hartley IP (2016). Investigating the controls on soil organic matter decomposition in tussock tundra soil and permafrost after fire. Soil Biology and Biochemistry, 99, 108-116. Abstract.  Full text.
Schädel C, Bader MK-F, Schuur EAG, Biasi C, Bracho R, Čapek P, De Baets S, Diáková K, Ernakovich J, Estop-Aragones C, et al (2016). Potential carbon emissions dominated by carbon dioxide from thawed permafrost soils. Nature Climate Change, 6(10), 950-953. Full text.
Auffret MD, Karhu K, Khachane A, Dungait JAJ, Fraser F, Hopkins DW, Wookey PA, Singh BK, Freitag TE, Hartley IP, et al (2016). The Role of Microbial Community Composition in Controlling Soil Respiration Responses to Temperature. PLoS One, 11(10). Abstract.  Author URL.  Full text.

2015

Hartley IP, Hill TC, Wade TJ, Clement RJ, Moncrieff JB, Prieto-Blanco A, Disney MI, Huntley B, Williams M, Howden NJK, et al (2015). Quantifying landscape-level methane fluxes in subarctic Finland using a multiscale approach. Global Change Biology, 21(10), 3712-3725. Abstract.  Full text.
Laudicina VA, Benhua S, Dennis PG, Badalucco L, Rushton SP, Newsham KK, O Donnell AG, Hartley IP, Hopkins DW (2015). Responses to increases in temperature of heterotrophic micro-organisms in soils from the maritime Antarctic. Polar Biology, 38(8), 1153-1160. Abstract.

2014

Hartley IP (2014). Soil carbon: Resisting climate change. Nature Climate Change, 4(9), 760-761.
Karhu K, Auffret MD, Dungait JAJ, Hopkins DW, Prosser JI, Singh BK, Subke J-A, Wookey PA, Agren GI, Sebastià M-T, et al (2014). Temperature sensitivity of soil respiration rates enhanced by microbial community response. Nature, 513(7516), 81-84. Abstract.  Author URL.  Full text.

2013

Hartley I, Garnett MH, Sommerkorn M, Hopkins DW, Fletcher BJ, Sloan VL, Phoenix GK, Wookey PA (2013). A potential loss of carbon associated with greater plant growth in the European Arctic. Nature Climate Change, 2, 875-879.
Fraser FC, Hallett PD, Wookey PA, Hartley IP, Hopkins DW (2013). How do enzymes catalysing soil nitrogen transformations respond to changing temperatures?. Biology and Fertility of Soils, 49(1), 99-103. Abstract.
Hartley IP, Garnett MH, Sommerkorn M, Hopkins DW, Wookey PA (2013). The age of CO<inf>2</inf>released from soils in contrasting ecosystems during the arctic winter. Soil Biology and Biochemistry, 63, 1-4. Abstract.  Full text.

2012

Burke EJ, Hartley I, Jones CD (2012). Uncertainties in the global temperature change caused by carbon release from permafrost thawing. The Cryosphere, 6, 1063-1076.

2010

Garnett MH, Hartley IP (2010). A passive sampling method for radiocarbon analysis of atmospheric CO2 using molecular sieve. Atmospheric Environment, 44(7), 877-883. Abstract.
Hartley IP, Hopkins DW, Sommerkorn M, Wookey PA (2010). The response of organic matter mineralisation to nutrient and substrate additions in sub-arctic soils. Soil Biology and Biochemistry, 42(1), 92-100. Abstract.  Full text.

2009

Garnett MH, Hartley IP, Hopkins DW, Sommerkorn M, Wookey PA (2009). A passive sampling method for radiocarbon analysis of soil respiration using molecular sieve. Soil Biology and Biochemistry, 41(7), 1450-1456. Abstract.
Wookey PA, Aerts R, Bardgett RD, Baptist F, Bråthen K, Cornelissen JHC, Gough L, Hartley IP, Hopkins DW, Lavorel S, et al (2009). Ecosystem feedbacks and cascade processes: Understanding their role in the responses of Arctic and alpine ecosystems to environmental change. Global Change Biology, 15(5), 1153-1172. Abstract.
Hartley IP, Hopkins DW, Garnett MH, Sommerkorn M, Wookey PA (2009). No evidence for compensatory thermal adaptation of soil microbial respiration in the study of Bradford et al. (2008). Ecol Lett, 12(7), E12-E14. Abstract.  Author URL.

2008

Zaragoza-Castells J, Sánchez-Gómez D, Hartley IP, Matesanz S, Valladares F, Lloyd J, Atkin OK (2008). Climate-dependent variations in leaf respiration in a dry-land, low productivity Mediterranean forest: the importance of acclimation in both high-light and shaded habitats. Functional Ecology, 22(1), 172-184. Abstract.
Hartley IP, Hopkins DW, Garnett MH, Sommerkorn M, Wookey PA (2008). Soil microbial respiration in arctic soil does not acclimate to temperature. Ecol Lett, 11(10), 1092-1100. Abstract.  Author URL.
Hawkes CV, Hartley IP, Ineson P, Fitter AH (2008). Soil temperature affects carbon allocation within arbuscular mycorrhizal networks and carbon transport from plant to fungus. Global Change Biology, 14(5), 1181-1190. Abstract.
Hartley IP, Ineson P (2008). Substrate quality and the temperature sensitivity of soil organic matter decomposition. Soil Biology and Biochemistry, 40(7), 1567-1574. Abstract.  Full text.

2007

Hartley IP, Heinemeyer A, Ineson P (2007). Effects of three years of soil warming and shading on the rate of soil respiration: Substrate availability and not thermal acclimation mediates observed response. Global Change Biology, 13(8), 1761-1770. Abstract.
Heinemeyer A, Hartley IP, Evans SP, Carreira De La Fuente JA, Ineson P (2007). Forest soil CO<inf>2</inf>flux: Uncovering the contribution and environmental responses of ectomycorrhizas. Global Change Biology, 13(8), 1786-1797. Abstract.
Hartley IP, Heinemeyer A, Evans SP, Ineson P (2007). The effect of soil warming on bulk soil vs. rhizosphere respiration. Global Change Biology, 13(12), 2654-2667. Abstract.

2006

Hartley IP, Armstrong AF, Murthy R, Barron-Gafford G, Ineson P, Atkin OK (2006). The dependence of respiration on photosynthetic substrate supply and temperature: Integrating leaf, soil and ecosystem measurements. Global Change Biology, 12(10), 1954-1968. Abstract.

Iain_Hartley Details from cache as at 2019-02-17 13:48:03

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External Engagement and Impact

External positions

Member of the NERC Radiocarbon Facility Steering Committee

Teaching

Office Hours: Term 2

Week 1: Tuesday 10:30 to 11:30; Tuesday 16:00 to 17:00

Week 2: Tuesday 9:30 to 10:30; Tuesday 16:00 to 17:00

Week 3: Tuesday 9:30 to 10:30; Tuesday 16:00 to 17:00

Week 4: Monday 9:30 to 10:30; Monday 16:00 to 17:00

Week 5: Tuesday 11:30 to 12:30; Tuesday 16:00 to 17:00

Week 6: Tuesday 11:30 to 12:30; Tuesday 16:00 to 17:00

Week 7: Tuesday 11:30 to 12:30; Tuesday 16:00 to 17:00

Week 8: Tuesday 9:30 to 10:30; Tuesday 16:00 to 17:00

Week 9: Tuesday 11:30 to 12:30; Tuesday 16:00 to 17:00

Week 10: Tuesday 11:30 to 12:30; Tuesday 16:00 to 17:00

Week 11: Tuesday 11:30 to 12:30; Tuesday 16:00 to 17:00

Modules

2018/19

Information not currently available


Supervision / Group

Postdoctoral researchers

Postgraduate researchers

  • Laynara Figueiredo Lugli with Lina Mercado
  • Katie Journeaux
  • Sankar Mariappan with Tim Quine and Jenni Dungait
  • Jennifer Michel with Jeanette Whitaker
  • Nicole Sanderson with Dan Charman

Alumni

  • Anka Asandei
  • Mark Cooper
  • Cristian Estop Aragones University of Alberta
  • Naomi Gatis
  • Kristiina Karhu University of Helsinki

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