Publication Abstracts

Peteet et al. 2016

Peteet, D., J. Nichols, C. Moy, A. McGeachy, and M. Perez, 2016: Recent and Holocene climate change controls on vegetation and carbon accumulation in Alaskan coastal muskegs. Quat. Sci. Rev., 131A, 168-178, doi:10.1016/j.quascirev.2015.10.032.

Pollen, spore, macrofossil and carbon data from a peatland near Cordova, Alaska, reveal insights into the climate-vegetation-carbon interactions from the initiation of the Holocene, c. the last 11.5 ka, to the present (1 ka = 1000 calibrated years before present where 0 = 1950 CE). The Holocene period is characterized by early deposition of gyttja in a pond environment with aquatics such as Nuphar polysepalum and Potamogeton, and a significant regional presence of Alnus crispa subsp. sinuata. Carbon accumulation (50 g/m2/a) was high for a short interval in the early Holocene when Sphagnum peat accumulated, but was followed by a major decline to 13 g/m2/a from 7 to 3.7 ka when Cyperaceae and ericads such as Rhododendron (formerly Ledum) groenlandicum expanded. This shift to sedge growth is representative of many peatlands throughout the south-central region of Alaska, and indicates a drier, more evaporative environment with a large decline in carbon storage. The subsequent return to Sphagnum peat after 4 ka in the Neoglacial represents a widespread shift to moister, cooler conditions, which favored a resurgence of ericads, such as Andromeda polifolia, and increased carbon accumulation rate. The sustained Alnus expansion visible in the top 10 cm of the peat profile is correlative with glacial retreat and warming of the region in the last century, and suggests this colonization will continue as temperature increases and ice melts.

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BibTeX Citation

@article{pe05600n,
  author={Peteet, D. and Nichols, J. and Moy, C. and McGeachy, A. and Perez, M.},
  title={Recent and Holocene climate change controls on vegetation and carbon accumulation in Alaskan coastal muskegs},
  year={2016},
  journal={Quat. Sci. Rev.},
  volume={131A},
  pages={168--178},
  doi={10.1016/j.quascirev.2015.10.032},
}

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RIS Citation

TY  - JOUR
ID  - pe05600n
AU  - Peteet, D.
AU  - Nichols, J.
AU  - Moy, C.
AU  - McGeachy, A.
AU  - Perez, M.
PY  - 2016
TI  - Recent and Holocene climate change controls on vegetation and carbon accumulation in Alaskan coastal muskegs
JA  - Quat. Sci. Rev.
VL  - 131A
SP  - 168
EP  - 178
DO  - 10.1016/j.quascirev.2015.10.032
ER  -

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