We found a match
Your institution may have rights to this item. Sign in to continue.
- Title
Carbon storage change and δ13C transitions of peat columns in a partially forestry-drained boreal bog.
- Authors
Nykänen, Hannu; Rissanen, Antti J.; Turunen, Jukka; Tahvanainen, Teemu; Simola, Heikki
- Abstract
Background and aims: In forestry-drained peatlands, drying leads to changes in C cycling which could affect peat δ13C. Furthermore, the δ13C profile of the entire peat column may reveal effects of earlier climatic periods. Methods: We measured peat δ13C and C inventories in adjacent peat profiles, two collected from undrained and two from the drained side of a bog that was partially ditch-drained 37 years earlier. The cores were sliced into 10-cm subsamples for analyses; matching of the profiles based on surface levelling, peat stratigraphic correlation and a horizontal ash layer found in both profiles. Results: Surface subsidence of 30 cm was observed in the dried site and the uppermost 160 cm in the undrained site contained an excess of 5.9 kg m−2 of C compared with the corresponding strata of the ditch-drained site. The δ13C values increased but markedly only in the thin surface layer of the drained site, indicating low δ13C of the missing C (ca. –30‰). In the deeper strata, dating to Mid-Holocene, high dry bulk density, C%, N%, humification index and low C/N ratio were connected to low δ13C of peat. Conclusions: Drainage of 37 years increased δ13C values in the upper peat profile of the drained bog and led to the selective loss of 13C depleted C. Results indicate that C balance studies can be aided by C isotope analyses. Low δ13C values in the peat profile indicate the existence of a wet fen stage during the moist and warm period during Mid-Holocene.
- Subjects
BOGS; PEAT; STRATIGRAPHIC correlation; ISOTOPIC analysis; PEATLANDS; PLANT growing media; FORESTS &; forestry
- Publication
Plant & Soil, 2020, Vol 447, Issue 1/2, p365
- ISSN
0032-079X
- Publication type
Article
- DOI
10.1007/s11104-019-04375-5