Establishment of a black cottonwood plantation on an exposed site in Iceland: plant growth and site energy balance

Aradóttir, Ása L.; Thorgeirsson, Halldór; McCaughey, J. H.; Strachan, Ian B.; Robertson, Alexander

doi:10.1016/s0168-1923(96)02370-2

Cited by 12 publications

(4 citation statements)

References 15 publications

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“…Phenological observations in spring followed a system described by Aradottir et al (1997). Similar end-of-season observations followed the formation of dormant buds.…”

Section: Bud Phenology In Spring and Autumnsupporting

confidence: 58%

“…P. trichocarpa is the fourth most planted non-native tree species in Iceland, and the Idunn clone originates from the Copper River Delta region, Alaska (latitude 60-61°), an area with a similar climate to Gunnarsholt (Sigurdsson 2001). A microclimatic station was installed at the centre of the site in 1989, where a range of climatic parameters, including air temperature, soil temperature and global radiation, was monitored (Aradottir et al 1997). The soil is an Andisol (found only in volcanic areas) and silty loam in texture.…”

Section: Methodsmentioning

confidence: 99%

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Elevated [CO2] and nutrient status modified leaf phenology and growth rhythm of young Populus trichocarpa trees in a 3-year field study

Sigurðsson

2001

Trees

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Young individuals of a single clone of black cottonwood, in Iceland, were exposed for 3 years to elevated atmospheric CO 2 concentrations [CO 2 ] in wholetree chambers at natural and high nutrient availability. No treatment effects were found at bud break or the start of shoot extension in spring. Autumn phenology was, however, affected both by elevated [CO 2 ] and changes in nutrient status. The time of annual growth cessation was linearly related to leaf nitrogen concentration, irrespective of CO 2 treatment. At low (natural) nutrient availability, elevated [CO 2 ] accelerated growth cessation and bud set, which reduced the period of active growth. An earlier and more pronounced leaf senescence and corresponding loss of photosynthetic capacity further decreased carbon acquisition in elevated [CO 2 ]. The negative [CO 2 ] effect on duration of shoot extension and leaf senescence existed, but was not as pronounced, when trees grew at higher nutrient availability. Improved nutrient availability extended the shoot extension period and delayed leaf senescence. It is suggested that trees grown in elevated [CO 2 ] altered their autumn phenology as an effect of a signal similar to that in trees growing at low nutrient availability, i.e. an imbalance between carbon and nitrogen sources. These alterations in autumn phenology may be important when predicting how trees will grow in a future CO 2 environment.

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“…Phenological observations in spring followed a system described by Aradottir et al (1997). Similar end-of-season observations followed the formation of dormant buds.…”

Section: Bud Phenology In Spring and Autumnsupporting

confidence: 58%

Section: Methodsmentioning

confidence: 99%

Elevated [CO2] and nutrient status modified leaf phenology and growth rhythm of young Populus trichocarpa trees in a 3-year field study

Sigurðsson

2001

Trees

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“…However, because of its convenience and since 0 8C proved to be as appropriate as, or even better than, higher base temperatures (Hänninen, 1990;Heide, 1993), a base temperature of 0 8C was preferred in the present study. In the study of Sigurdsson (2001), this base temperature gave better results than a threshold of 4 8C used in a previous phenological study of P. trichocarpa in Iceland (Aradottir et al, 1997).…”

Section: Discussionmentioning

confidence: 60%

Genetic Variation of the Bud and Leaf Phenology of Seventeen Poplar Clones in a Short Rotation Coppice Culture

2004

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Leaf phenology of 17 poplar ( Populus spp.) clones, encompassing spring phenology, length of growth period and end-of-year phenology, was examined over several years of different rotations. The 17 poplar clones differed in their latitude of origin (45 degrees 30'N to 51 degrees N) and were studied on a short rotation experimental field plantation, situated in Boom (province of Antwerpen, Belgium; 51 degrees 05'N, 04 degrees 22'E). A similar, clear pattern of bud burst was observed during the different years of study for all clones. Clones Columbia River, Fritzi Pauley, Trichobel (Populus trichocarpa) and Balsam Spire (Populus trichocarpa x Populus balsamifera) from 45 degrees 30'N to 49 degrees N reached bud burst (expressed as day of the year or degree day sums) almost every year earlier than clones Wolterson (Populus nigra), Gaver, Gibecq and Primo (Populus deltoides x Populus nigra) (50 degrees N to 51 degrees N). This observation could not be generalised to end-of-season phenology, for which a yearly returning pattern for all clones was lacking. Late bud burst and early leaf fall of some clones (Beaupré, Boelare, IBW1, IBW2, IBW3) was brought about by increasing rust incidence during the years of observation. For these clones, the variability in leaf phenology was reflected in high coefficients of variation among years. The patterns of genetic variation in leaf phenology have implications for short rotation intensive culture forestry and management of natural populations. Moreover, the variation in phenology reported here is relevant with regard to the genetic mapping of poplar.

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“…The Idunn-clone originates from the Copper River Delta region, Alaska (Lat 60-61 • ); an area with similar climate as Gunnarsholt (Sigurdsson, 2001). A microclimatic station was installed at the centre of the site in 1989, where a range of climatic parameters, including air temperature, soil temperature and global radiation, were monitored (Aradottir et al, 1997). The soil is an Andisol (found only in volcanic areas) and silty loam in texture.…”

Section: Site Descriptionmentioning

confidence: 99%

Effects of thinning and fertilization on soil respiration in a cottonwood plantation in Iceland

Jónsson

Sigurðsson

2009

Preprint

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Abstract. The main goal of this research was to determine the short-term effects of forest management practices (precommercial thinning and fertilization) on carbon efflux of a young black cottonwood (Populus trichocarpa) plantation in southern Iceland. Changes in leaf area index, tree growth, soil and air temperature were also monitored. Traditional precommercial thinning (50%) had little effect on soil temperature, but heavy thinning (80%) led to higher soil temperatures in spring and summer, but not much difference in winter. Thinning did not change foliage nutrient content or tree growth in the first treatment year. Effects on soil respiration were surprising; even if soil temperature was slightly higher and all organic material was left at site after precommercial thinning, soil respiration in the thinned stands was significantly lowered. Fertilization increased foliage nutrient content, but did not significantly change tree growth during the first growing season following spring application. It did however significantly increase soil respiration rate in the first treatment year. These results may be important when the effects of early forest management on carbon fluxes are modeled.

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Establishment of a black cottonwood plantation on an exposed site in Iceland: plant growth and site energy balance

Cited by 12 publications

References 15 publications

Elevated [CO2] and nutrient status modified leaf phenology and growth rhythm of young Populus trichocarpa trees in a 3-year field study

Elevated [CO2] and nutrient status modified leaf phenology and growth rhythm of young Populus trichocarpa trees in a 3-year field study

Genetic Variation of the Bud and Leaf Phenology of Seventeen Poplar Clones in a Short Rotation Coppice Culture

Effects of thinning and fertilization on soil respiration in a cottonwood plantation in Iceland

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