Titlebook: Vegetation and Production Ecology of an Alaskan Arctic Tundra; Larry L. Tieszen Book 1978 Springer-Verlag New York Inc. 1978 Assimilat.Flo

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Nebulous

The Role of Algae in Tundra Soils, 1965; Foged, 1971; Hilliard and Tash, 1966; Kalff, 1967, 1970; Kling, 1972; Maruyama, 1967; Prescott, 1953, 1954, 1963a,b,c; Prescott and Vinyard, 1965). Although taxonomic synonymity must be considered (Prescott, 1964), between 3000 and 4000 species have been identified for the North American Arc

Immobilize

Ecto- and Endomycorrhizae of Arctic Plants at Barrow, Alaskaozlowski, 1973). The early research dealt with ectomycorrhizal fungi and a series of experiments clearly indicated that greater uptake of nitrogen and phosphorus from infertile soils occurred when mycorrhizae were present. Nutritional studies of selected mycorrhizal fungi by Palmer and Hacskaylo (19

GORGE

Photosynthesis in the Principal Barrow, Alaska, Species: A Summary of Field and Laboratory Responseset meadow system is capable of accumulating 100 g of dry matter aboveground in a 55-day period (Tieszen, 1972). This production results in a minimal efficiency of primary production of 0.46%. This comparatively high efficiency suggests that the process of photosynthesis is adapted to the low ambient

上下倒置

Primary Production Processes in Arctic Bryophytes at Barrow, Alaska; Webber, 1974, 1978; Rastorfer, 1978). For example, bryophytes comprise 91% of the aboveground biomass in a sedge-moss meadow in Western Taimyr, and an average of 38% of the aboveground biomass for all IBP tundra sites reported by Wielgolaski (1972). In drier tundra areas, however, moss cover drops

悠然

defray

皮薩

Some Aspects of Water Relations of Arctic and Alpine Regionsa and to assess the possible role of water limitation on primary production in these two ecosystems. At low leaf water potentials, water limitation of production may occur by stomatal closure restricting water loss and photosynthesis or by reduced growth because of decreased cell turgor. Jarvis and

hypertension

Radio-Tracer Measurement of Transpiration in Tundra Vegetation, Barrow, Alaskaation and equipment. Micro-meteorological data may be used to estimate the potential evapotranspirational flux (Pruitt, 1971) and large weighing lysimeters (Pruit and Angus, 1960) have been employed in agricultural and university research facilities (Armijo et al., 1972) to make this measurement gra

fulcrum

Simulation of the Effect of the Tundra Vascular Plant Canopy on the Productivity of Four Plant Specis. Low temperatures, low solar and infrared irradiances, high wind speeds, permanently frozen subsoil, and impeded water drainage restrict the development of the vegetation by affecting plant growth and development, vegetation composition, and soil faunal activity and decomposition (Bliss, 1956; Bil