Physiological Ecology of Abscission

Addicott, Fredrick T.; Lyon, J. L.

doi:10.1016/b978-0-12-424250-0.50008-7

Cited by 69 publications

(27 citation statements)

References 93 publications

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“…This suggests radial growth of B. nana already ceased. Furthermore, the leaf color of B. nana usually starts to turn from green to yellow and red at the beginning of August at our site (online resource 5), indicating the degradation of chlorophyll (Addicott and Lyon 1973) and lower photosynthesis activities. It further explains why the length of growing season (number of days with mean daily temperature over 5°C per year) was not strongly correlated with the radial growth of B. nana.…”

Section: Climatic Change and Shrub Growthmentioning

confidence: 97%

The role of summer precipitation and summer temperature in establishment and growth of dwarf shrub Betula nana in northeast Siberian tundra

Heijmans

Berendse

et al. 2015

Polar Biol

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It is widely believed that deciduous tundrashrub dominance is increasing in the pan-Arctic region, mainly due to rising temperature. We sampled dwarf birch (Betula nana L.) at a northeastern Siberian tundra site and used dendrochronological methods to explore the relationship between climatic variables and local shrub dominance. We found that establishment of shrub ramets was positively related to summer precipitation, which implies that the current high dominance of B. nana at our study site could be related to high summer precipitation in the period from 1960 to 1990. The results confirmed that early summer temperature is most influential to annual growth rates of B. nana. In addition, summer precipitation stimulated shrub growth in years with warm summers, suggesting that B. nana growth may be co-limited by summer moisture supply. The dual controlling role of temperature and summer precipitation on B. nana growth and establishment is important to predict future climate-driven vegetation dynamics in the Arctic tundra.

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Section: Climatic Change and Shrub Growthmentioning

confidence: 97%

The role of summer precipitation and summer temperature in establishment and growth of dwarf shrub Betula nana in northeast Siberian tundra

Heijmans

Berendse

et al. 2015

Polar Biol

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“…A possible explanation for the fact that dominant trees showed not only a higher absolute biomass investment but also a higher proportion of cone biomass to vegetative biomass may be found with a closer examination of the reserve pool. In contrast to herbaceous plants and shrubs, which are known to allocate assimilates mainly from current photosynthesis to fruits and seeds (Addicott and Lyon 1973;Krabel and Eschrich 1991), trees are able to mobilise reserves which originate from former years. A possible hypothesis to check-ideally with stable isotope methods-would be: The proportion of surplus carbon in bigger trees is higher.…”

Section: Trade-offmentioning

confidence: 99%

Impacts of fructification on biomass production and correlated genetic effects in Norway spruce (Picea abies [L.] Karst.)

Seifert

Müller‐Starck

2008

Eur J Forest Res

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For the period 2003-2006, fructification of Norway spruce (Picea abies [L.] Karst.) was recorded at the Kranzberg forest site in Southern Germany by employing a crane with access to the canopy of more than 266 trees. For each tree, stem diameter and growth parameters were assessed annually as well as biomass of cones and seeds, number of seeds per cone, and proportions of empty seeds for a total of 371 trees with cone crop. Genotypes at 19 enzyme coding gene loci of 110 trees were included in the study of correlations between morphological and genetic traits. Re-scaling the observed values for a virtual pure Norway spruce stand of 1 ha, cone biomass including winged seeds (oven-dried at 38°C) varied between 706.8 kg/ha in 2006 (average value per tree was 3.6 kg) and values close to zero in 2005. Corresponding values for vegetative biomass increment of the coning trees in 2006 were 9,273.0 kg/ha and 10.8 kg/tree. A significant higher biomass investment was determined for dominant trees in terms of absolute cone mass as well as in terms of cone mass relative to vegetative biomass and fructification frequency. No trade-off effects in decreased vegetative biomass growth were found in the fructification year, compared to trees that did not grow cones. Although the dominant trees invested proportionally considerable biomass in cones, they showed no significant reduction in vegetative biomass growth. In the following year no decrease in vegetative growth was detected. Based on logistic regressions and homogeneity tests, respectively, significant genetic effect became evident with respect to the gene loci AAP-B and AAT-C concerning fructification probability in the year with maximum generative biomass investment. These and closely related loci also have been found to be indicative for growth and viability, respectively, in other species.

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“…Observations on a range of plant species (Merrill, 1945;Addicott & Lyons, 1973;McMichael et al, 1973) show feedback between leaf mass and the hydrological budget; increasing the supply of water to plants leads to leaf growth and an increase in leaf mass, whilst a decreased supply leads to leaf abscission and a reduction in leaf mass. Leaf mass may be used to predict vegetation type, with high leaf mass corresponding to forests and gradual reductions in leaf mass first corresponding with shrub vegetation and subsequently herbaceous and finally desert vegetation (Schulze, 1982).…”

Section: Physiological Basesmentioning

confidence: 99%

Climate and plant distribution at global and local scales

1987

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This paper investigates, with predictive models, the utility of ecophysiological responses to climate as predictors of plant distribution. At the global scale responses to extreme minimum temperatures and to the hydrological budget effectively predict the distribution limits of the major vegetation types of the World. A minimum temperature of -15 °C, for example, appears critical in controlling the poleward spread of vegetation that is dominated by evergreen broadleaved species; however, the presence or absence of more frost resistant species, such as those that are deciduous broadleaved, is not obviously explained in terms of extremes of climate. In such cases, predicting the competitive relationships between species is necessary and dependent on the climatic sensitivity of population dynamics.

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Physiological Ecology of Abscission

Cited by 69 publications

References 93 publications

The role of summer precipitation and summer temperature in establishment and growth of dwarf shrub Betula nana in northeast Siberian tundra

The role of summer precipitation and summer temperature in establishment and growth of dwarf shrub Betula nana in northeast Siberian tundra

Impacts of fructification on biomass production and correlated genetic effects in Norway spruce (Picea abies [L.] Karst.)

Climate and plant distribution at global and local scales

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