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Simulation of carbon di oxide uptake and water relations of 4 arctic bryophytes at point barrow alaska


, : Simulation of carbon di oxide uptake and water relations of 4 arctic bryophytes at point barrow alaska. Photosynthetica (Prague) 12(1): 7-20

A simulation model for CO2 uptake and water relations of 4 arctic mosses generalizes from experimental measurements on physiological processes to field conditions and closely predicts the daily courses of CO2 uptake and seasonal courses of tissue water content. Maximum simulated rates of CO2 uptake in the field are: 1.5-1.8 mg CO2 g-1 (dry wt) h-1 for Calliergon sarmentosum, 0.9-1.2 mg CO2 g-1 (dry wt) h-1 for Polytrichum alpinum, 0.8-1.0 mg CO2 g-1 (dry wt) h-1 for Dicranum angustum and 0.4-1.6 mg CO2 g-1 (dry wt) h-1 for D. elongatum. Total seasonal production of pure stands is 70.6, 39.9, 38.5 and 23.5 g CO2 m-2, respectively. At high soil water potentials Calliergon has the highest CO2 uptake rate of the 4 spp., but at low soil water potentials Calliergon has the lowest CO2 uptake rate and Polytrichum and D. angustum the highest. Simulations showed differential seasonal patterns of diurnal photosynthesis. Calliergon and D. angustum demonstrated their highest rates of photosynthesis early in the season. At this time Polytrichum and D. elongatum showed their lowest rates.

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Related references

Miller, P.; Oechel, W.; Stoner, W.; Sveinbjornsson, B., 1978: Simulation of CO2 uptake and water relations of four arctic bryophytes at Point Barrow, Alaska. Photosynthetica 2 (1) 7-20

Oechel W.C.; Collins N.J., 1973: Seasonal patterns of carbon di oxide exchange in bryophytes at barrow alaska. Bliss, L C And F E Wielgolaski (Ed ) International Biological Programme Tundra Biome Primary Production And Production Processes, Tundra Biome Proceedings Of The Conference, Dublin, Ireland April, 256p Illus Maps Tundra Biome Steering Committee: Wenner-Gren Center, Stockholm, Sweden 197-203

Irving, L., 1948: Arctic Research at Point Barrow, Alaska. Science 107(2777): 284-286

Drew, J.V.; Tedrow, J.C.F., 1957: Pedology of an Arctic brown profile near Point Barrow, Alaska. The Arctic brown profile forms on the medium-and coarse-textured material of well-drained sites in the Alaskan Arctic Slope. The profile shows an accumulation of organic matter in the A1 horizon, a weak translocation of Fe, A1, and Mn, and an accu...

Hume J.D.; Schalk M., 1974: The effects of ice on the beach and nearshore, Point Barrow, Arctic Alaska. Pages 28 1974

Schalk Marshall, 1957: Relation of arctic storms to shore-line changes at Point Barrow, Alaska. Geological Society of America Bulletin 1957

Bursa, Adam, 1963: Phytoplankton in coastal waters of the Arctic Ocean at Point Barrow, Alaska. Six different interlocking ecological niches and cycles, each containing a well-defined population can be distinsuished the phytoplankton cycle below the ice, the microflora of the meltwater pools, the phytoplankton cycle in the coastal and pffsho...

Coe, W.R., 1954: Geographical dis-tribution of the species of nemerteans of the Arctic Ocean near Point Barrow, Alaska. J Acad. Sci: 55-58

Coe, Wesley R., 1952: Geographical distribution of the species of nemerteans of the Arctic Ocean near Point Barrow, Alaska. More than 300 specimens were obtained by Prof. and Mrs. George MacGinitie during their 2 years at the Arctic Research Laboratory. They included 7 spp. of Amphiporus, 4 of Tubulanus, 3 of Micrura, 4 of Tetrastemma. 2 of Cerebratulus, and 1 each of...

Dixon, Joseph S., 1943: Birds observed between Point Barrow and Herschel Island on the Arctic coast of Alaska. A description of ecology, migration and breeding habits of birds observed on the Arctic Coast of Alaska during 2 summers and a winter, 1913-1914.