Estimation of the annual primary production of the lichen Cetrariella delisei in a glacier foreland in the High Arctic, Ny-Ålesund, Svalbard

Masaki Uchida, Takayuki Nakatsubo, Hiroshi Kanda, Hiroshi Koizumi

Research output: Contribution to journalArticle

17 Citations (Scopus)

Abstract

The fruticose lichen Cetrariella delisei is among the dominant lichen species in the deglaciated High Arctic areas of Svalbard. As part of a study of carbon cycling in the High Arctic, we aimed to estimate the primary production of lichen in a deglaciated area in Ny-Ålesund, Svalbard (79° N), by examining the effects of abiotic factors on the net photosynthesis (Pn) and dark respiration (R) rates of C. delisei. Experiments were conducted in the snow-free season of 2000 using an open-flow gas exchange system with an infrared gas analyser. Positive photosynthetic activities were observed on rainy days or soon after rainfall when the thallus water content was high, whereas photosynthetic activities dropped below the detectable limit on clear days because of the low thallus water content. Under a sufficiently high thallus water content and close to light saturation, Pn was nearly constant over a wide temperature range of 4-20 °C, while R increased with increasing temperature. We constructed a model for estimating the net primary production (NPP) of lichen based on the relationships between abiotic factors and the CO2 exchange rate. The mean, minimum and maximum NPP values in the snow-free season, estimated using meteorological data obtained from 1995-2003, were 5.1, 1.0 and 8.4 g dry wt. m-2 snow-free season-1, respectively. These results suggest that NPP is highly variable and the contribution of lichen to carbon input is small compared with that of vascular plants and mosses in the study site.

Original languageEnglish
Pages (from-to)39-49
Number of pages11
JournalPolar Research
Volume25
Issue number1
Publication statusPublished - 2006
Externally publishedYes

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Glaciers
lichen
primary production
glacier
net primary production
Snow
Water content
Photosynthesis
snow
water content
photosynthesis
Carbon
Gases
carbon
gas exchange
exchange rate
vascular plant
moss
Rain
respiration

ASJC Scopus subject areas

  • Earth and Planetary Sciences (miscellaneous)
  • Oceanography
  • Environmental Science(all)
  • Environmental Chemistry

Cite this

Estimation of the annual primary production of the lichen Cetrariella delisei in a glacier foreland in the High Arctic, Ny-Ålesund, Svalbard. / Uchida, Masaki; Nakatsubo, Takayuki; Kanda, Hiroshi; Koizumi, Hiroshi.

In: Polar Research, Vol. 25, No. 1, 2006, p. 39-49.

Research output: Contribution to journalArticle

Uchida, Masaki ; Nakatsubo, Takayuki ; Kanda, Hiroshi ; Koizumi, Hiroshi. / Estimation of the annual primary production of the lichen Cetrariella delisei in a glacier foreland in the High Arctic, Ny-Ålesund, Svalbard. In: Polar Research. 2006 ; Vol. 25, No. 1. pp. 39-49.
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