Tags

Type your tag names separated by a space and hit enter

Role of recent climate change on carbon sequestration in peatland systems.
Sci Total Environ 2019; 667:348-358ST

Abstract

This paper provides information on the impact of recent climate change on carbon sequestration in peatland systems in South West England. This is important because peatlands have the potential to sequester and hold large quantities of anthropogenically released CO2. This paper investigates whether there has been a reduction in the strength of carbon sinks in a valley mire and blanket bog, which occur on the limits of the biogeographical envelop for peatlands in Britain. Past rates of carbon accumulation were calculated from peat depth and the sequential analysis of peat age, bulk density and carbon content from cores taken from valley mire and blanket bog. At the valley mire site contemporary net ecosystem carbon balance (NECB) was calculated by measuring inputs to the peat body, via net primary productivity (NPP), of Sphagna. Losses of C from the peat body were calculated by measuring CH4, and aquatic carbon, calculated from catchment export of particulate and dissolved organic carbon. The study found similar mean rates of carbon accumulation since 1850 of 11.26 t ± 0.68 t CO2e ha-1 yr-1 (307 g C m-2 yr-1) in valley mire and 11.77 t ± 0.88 t CO2e ha-1 yr-1 (321 g C m-2 yr-1) in blanket bog. The mean present-day CO2 sequestration rate for Sphagna on valley mire was calculated to be 9.13 t ± 0.98 t CO2e ha-1 yr-1 (249 g C m-2 yr-1). Both past and contemporary rates of CO2 sequestration were found to be at the maxima of those reported for temperate peatlands. NPP was found to vary according to microform with higher rates of carbon sequestration found in lawn and hummock microforms compared with pools. Our work suggests that recent changes in the climate appear to have had limited impact on the strength of peatland carbon sinks in South West England.

Authors+Show Affiliations

School of Geography, Earth and Environmental Science, Portland Square, Drake Circus, University of Plymouth, Devon PL4 8AA, United Kingdom. Electronic address: paul.lunt@plymouth.ac.uk.School of Geography, Earth and Environmental Science, Portland Square, Drake Circus, University of Plymouth, Devon PL4 8AA, United Kingdom.School of Geography, Earth and Environmental Science, Portland Square, Drake Circus, University of Plymouth, Devon PL4 8AA, United Kingdom.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

30833238

Citation

Lunt, Paul H., et al. "Role of Recent Climate Change On Carbon Sequestration in Peatland Systems." The Science of the Total Environment, vol. 667, 2019, pp. 348-358.
Lunt PH, Fyfe RM, Tappin AD. Role of recent climate change on carbon sequestration in peatland systems. Sci Total Environ. 2019;667:348-358.
Lunt, P. H., Fyfe, R. M., & Tappin, A. D. (2019). Role of recent climate change on carbon sequestration in peatland systems. The Science of the Total Environment, 667, pp. 348-358. doi:10.1016/j.scitotenv.2019.02.239.
Lunt PH, Fyfe RM, Tappin AD. Role of Recent Climate Change On Carbon Sequestration in Peatland Systems. Sci Total Environ. 2019 Jun 1;667:348-358. PubMed PMID: 30833238.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Role of recent climate change on carbon sequestration in peatland systems. AU - Lunt,Paul H, AU - Fyfe,Ralph M, AU - Tappin,Alan D, Y1 - 2019/02/19/ PY - 2018/12/14/received PY - 2019/02/09/revised PY - 2019/02/15/accepted PY - 2019/3/6/pubmed PY - 2019/4/6/medline PY - 2019/3/6/entrez KW - CO(2) sequestration KW - Climate change KW - Net ecosystem carbon balance KW - Peat accumulation KW - Peatlands KW - Sphagnum SP - 348 EP - 358 JF - The Science of the total environment JO - Sci. Total Environ. VL - 667 N2 - This paper provides information on the impact of recent climate change on carbon sequestration in peatland systems in South West England. This is important because peatlands have the potential to sequester and hold large quantities of anthropogenically released CO2. This paper investigates whether there has been a reduction in the strength of carbon sinks in a valley mire and blanket bog, which occur on the limits of the biogeographical envelop for peatlands in Britain. Past rates of carbon accumulation were calculated from peat depth and the sequential analysis of peat age, bulk density and carbon content from cores taken from valley mire and blanket bog. At the valley mire site contemporary net ecosystem carbon balance (NECB) was calculated by measuring inputs to the peat body, via net primary productivity (NPP), of Sphagna. Losses of C from the peat body were calculated by measuring CH4, and aquatic carbon, calculated from catchment export of particulate and dissolved organic carbon. The study found similar mean rates of carbon accumulation since 1850 of 11.26 t ± 0.68 t CO2e ha-1 yr-1 (307 g C m-2 yr-1) in valley mire and 11.77 t ± 0.88 t CO2e ha-1 yr-1 (321 g C m-2 yr-1) in blanket bog. The mean present-day CO2 sequestration rate for Sphagna on valley mire was calculated to be 9.13 t ± 0.98 t CO2e ha-1 yr-1 (249 g C m-2 yr-1). Both past and contemporary rates of CO2 sequestration were found to be at the maxima of those reported for temperate peatlands. NPP was found to vary according to microform with higher rates of carbon sequestration found in lawn and hummock microforms compared with pools. Our work suggests that recent changes in the climate appear to have had limited impact on the strength of peatland carbon sinks in South West England. SN - 1879-1026 UR - https://www.unboundmedicine.com/medline/citation/30833238/Role_of_recent_climate_change_on_carbon_sequestration_in_peatland_systems L2 - https://linkinghub.elsevier.com/retrieve/pii/S0048-9697(19)30737-5 DB - PRIME DP - Unbound Medicine ER -