The vegetation of alberta

Moss, E. H.

doi:10.1007/bf02872442

Cited by 124 publications

(61 citation statements)

References 70 publications

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“…The site is 626 m above sea level, with a mean annual temperature of 2.1°C and precipitation of 503.7 mm, of which one third falls as snow (Environment Canada 2004). The plantation stands studied in this paper occur on Gleysolic soils (Soil Classification Working Group 1998) and are in the Mixedwood Section of the boreal forest (Moss 1955). The soils belong to the Tolman soil series developed on till materials and are characterized by loam to sandy loam textures (Kjearsgaard 1972; Table 1).…”

Section: Site Descriptionmentioning

confidence: 99%

Some characteristics of soil respiration in hybrid poplar plantations in northern Alberta

Saurette¹,

Chang²,

Thomas³

2006

Can. J. Soil. Sci.

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. 2006. Some characteristics of soil respiration in hybrid poplar plantations in northern Alberta. Can. J. Soil Sci. 86: 257-268. Fast-growing hybrid poplars are being planted in the Canadian prairies to meet the increasing demand for fibre and environmental services of trees and forests; however, the impact of hybrid poplars on C dynamics and storage on previously farmed land is largely unknown for the boreal region. We measured soil CO 2 efflux along a chronosequence (3-, 9-, and 11-yr-old stands) of hybrid poplar (Populus deltoides × Populus × petrowskyana var. Walker) plantations and a control agricultural field from June to August 2004. Measurements were made between 0800 and 1800 with a portable Li-Cor 6400-09 system and were based on 4-5 min averaging. We also measured the response to simulated rainfall and the diurnal fluctuation of soil CO 2 efflux. Soil CO 2 efflux ranged from 1.30 µmol CO 2 m -2 s -1 in the 3-yr-old plantation to 5.41 µmol CO 2 m -2 s -1 in the agricultural control field, or from 0.17 µmol CO 2 m -2 s -1 kg -1 C (based on soil organic C content to a 0.4 m depth) in the 3-yr-old plantation to 1.09 µmol CO 2 m -2 s -1 kg -1 C in the 11-yr-old plantation. Simulated rainfall applied in the 3-yr-old plantation and a newly planted site resulted in an immediate pulse of CO 2 efflux, 2.90 and 2.54 µmol CO 2 m -2 s -1 , respectively, followed by an efflux rate sustained slightly above pre-irrigation levels. No secondary pulse of soil respiration was observed in the 2-h period following water application. Diurnal variation of soil respiration was found to be small between 0600 and 1900 in the agricultural control field, with values that varied from 2.66 to 3.17 µmol CO 2 m -2 s -1 . Continued monitoring of soil respiration and other C cycling processes in the chronosequence will improve our understanding of the potential for C sequestration in hybrid poplar plantations in northern Alberta. Les auteurs ont aussi mesuré la réaction à une pluie artificielle et la fluctuation diurne des efflux de CO 2 du sol. Ces derniers varient de 1,30 µmol de CO 2 par m 2 et par seconde pour la plantation de trois ans à 5,41 µmol pour la culture témoin, ou de 0,17 µmol de CO 2 par m 2 et par seconde, par kilo de C (teneur du sol en C organique à 0,4 m de profondeur), pour la plantation de trois ans à 1,09 µmol pour celle de onze ans. La pluie artificielle a immédiatement entraîné un efflux de CO 2 de 2,90 et de 2,54 µmol par m 2 et par seconde dans la plantation de trois ans et dans une nouvelle plantation, respectivement. Cette réaction a été suivie par un efflux stable, légèrement supérieur à celui observé avant l'irrigation. Aucun signe de respiration secondaire du sol n'a été observé au cours des deux heures qui ont suivi l'arrosage. La respiration du sol varie peu durant le jour, entre 6 h et 19 h, dans le champ cultivé, les valeurs fluctuant de 2,66 à 3,17 µmol de CO 2 par m 2 et par seconde. En poursuivant l'étude de la respiration du sol et d'autres processus du cycle du carbone dans cette chronoséquence...

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Section: Site Descriptionmentioning

confidence: 99%

Some characteristics of soil respiration in hybrid poplar plantations in northern Alberta

Saurette¹,

Chang²,

Thomas³

2006

Can. J. Soil. Sci.

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“…1). Broadscale treatments of the vegetation in the western interior of Canada are available from Moss (1955), LaRoi (1967), Crampton (1973), North (1976), Achuff & LaRoi (1977), Rowe (1972), Larsen (1980) and Ritchie (1980Ritchie ( , 1984. The following description ofthe vegetation draws liberally from these sources.…”

Section: Modern Vegetation Of the Study Areamentioning

confidence: 99%

Modern Pollen Spectra From the Western Interior of Canada and the Interpretation of Late Quaternary Vegetation Development

MacDonald

Ritchie

1986

New Phytologist

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SUMMARY The pollen spectra obtained from 127 lake sediment surface samples from the western interior of Canada are examined. Principal components biplots and discriminant analysis are used to investigate the correspondence between modern pollen rain and major vegetation zones in the study area. It is demonstrated that the major vegetation zones in the western interior of Canada can be distinguished on the basis of their modern pollen rain. Principal components biplots and discriminant analysis are also used to compare late Quaternary fossil pollen assemblages from lakes located near the southern and northern periphery of the modern boreal forest with the modern pollen spectra. The results suggest that the late Pleistocene and early Holocene pollen spectra from the southern and northern periphery of the boreal forest lack modern analogues in the western interior of Canada. The northern and southern boundaries of the boreal forest were located north of their modern positions during the mid Holocene. Vegetation developed and responded to mid Holocene climatic change at different rates at the two sites. Modern vegetation conditions were established at both sites between 5000 B.P. to 3000 B.P. Vegetation has remained relatively stable during the last three thousand years.

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“…Even light grazing reduces the proportion of rough fescue and increases Parry oat grass (Looman 1969). As a result, Parry oat grass is often the dominant forage species on grazed range (Moss 1955 (Willms et al 1985). …”

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confidence: 99%

Cutting frequency and cutting height effects on forage quality of rough fescue and Parry oat grass

Willms¹,

Beauchemin²

1991

Can. J. Anim. Sci.

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The vegetation of alberta

Cited by 124 publications

References 70 publications

Some characteristics of soil respiration in hybrid poplar plantations in northern Alberta

Some characteristics of soil respiration in hybrid poplar plantations in northern Alberta

Modern Pollen Spectra From the Western Interior of Canada and the Interpretation of Late Quaternary Vegetation Development

Cutting frequency and cutting height effects on forage quality of rough fescue and Parry oat grass

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