Predicting tree biomass growth in the temperate-boreal ecotone: Is tree size, age, competition, or climate response most important?

2016 ◽  
Vol 22 (6) ◽  
pp. 2138-2151 ◽  
Author(s):  
Jane R. Foster ◽  
Andrew O. Finley ◽  
Anthony W. D'Amato ◽  
John B. Bradford ◽  
Sudipto Banerjee
Keyword(s):  
Tree Size ◽  
Biomass Growth ◽  
Climate Response ◽  
Tree Biomass

scholarly journals Biomass Allocation into Woody Parts and Foliage in Young Common Aspen (Populus tremula L.)—Trees and a Stand-Level Study in the Western Carpathians

Forests ◽  
2020 ◽  
Vol 11 (4) ◽  
pp. 464 ◽  
Author(s):  
Bohdan Konôpka ◽  
Jozef Pajtík ◽  
Vladimír Šebeň ◽  
Peter Surový ◽  
Katarína Merganičová
Keyword(s):  
Leaf Area Index ◽  
Leaf Area ◽  
Biomass Allocation ◽  
Tree Size ◽  
Populus Tremula ◽  
Tree Biomass ◽  
Area Index ◽  
Biomass Models ◽  
Maximum Value ◽  
Independent Variable

Our research of common aspen (Populus tremula L.) focused on the forested mountainous area in central Slovakia. Forest stands (specifically 27 plots from 9 sites) with ages between 2 and 15 years were included in measurements and sampling. Whole tree biomass of aspen individuals was destructively sampled, separated into tree components (leaves, branches, stem, and roots), and then dried and weighed. Subsamples of fresh leaves from three crown parts (upper, middle, and lower) were scanned, dried, and weighed. Allometric biomass models with stem base diameter as an independent variable were derived for individual tree components. Basic foliage traits, i.e., leaf mass, leaf area, and specific leaf area, were modelled with regard to tree size and leaf position within the crown. Moreover, biomass stock of the woody parts and foliage as well as the leaf area index were modelled using mean stand diameter as an independent variable. Foliage traits changed with both tree size and crown part. Biomass models showed that foliage contribution to total tree biomass decreased with tree size. The total foliage area of a tree increased with tree size, reaching its maximum value of about 12 m2 for a tree with a diameter of 120 mm. Leaf area index increased with mean stand diameter, reaching a maximum value of 13.5 m2 m−2. Since no data for biomass allocation for common aspen had been available at either the tree or stand levels, our findings might serve for both theoretical (e.g., modelling of growth processes) and practical (forestry and agro-forestry stakeholders) purposes.

Quantifying the impact of current and future tropospheric ozone on tree biomass, growth, physiology and biochemistry: a quantitative meta-analysis

2009 ◽  
Vol 15 (2) ◽  
pp. 396-424 ◽  
Author(s):  
VICTORIA E. WITTIG ◽  
ELIZABETH A. AINSWORTH ◽  
SHAWNA L. NAIDU ◽  
DAVID F. KARNOSKY ◽  
STEPHEN P. LONG
Keyword(s):  
Tropospheric Ozone ◽  
Meta Analysis ◽  
Biomass Growth ◽  
Tree Biomass ◽  
Growth Physiology ◽  
Physiology And Biochemistry ◽  
The Impact

scholarly journals Satellite data as indicators of tree biomass growth and forest dieback in a Mediterranean holm oak forest

2014 ◽  
Vol 72 (1) ◽  
pp. 135-144 ◽  
Author(s):  
Romà Ogaya ◽  
Adrià Barbeta ◽  
Corina Başnou ◽  
Josep Peñuelas
Keyword(s):  
Satellite Data ◽  
Holm Oak ◽  
Oak Forest ◽  
Biomass Growth ◽  
Tree Biomass ◽  
Forest Dieback

Tree Biomass, Growth and Nutrient Pools

2000 ◽  
pp. 49-62 ◽  
Author(s):  
G. Scarascia-Mugnozza ◽  
G. A. Bauer ◽  
H. Persson ◽  
G. Matteucci ◽  
A. Masci
Keyword(s):  
Biomass Growth ◽  
Tree Biomass ◽  
Nutrient Pools

Modeling potentially sustainable biomass productivity in jack pine forest stands

1998 ◽  
Vol 78 (1) ◽  
pp. 105-113 ◽  
Author(s):  
J. S. Bhatti ◽  
N. W. Foster ◽  
T. Oja ◽  
M. H. Moayeri ◽  
P. A. Arp
Keyword(s):  
Steady State ◽  
Atmospheric Deposition ◽  
Mass Balance ◽  
Forest Fire ◽  
Forest Biomass ◽  
Jack Pine ◽  
Biomass Growth ◽  
Tree Biomass ◽  
Nutrient Demand ◽  
Whole Tree

A steady-state mass balance model (ForSust), developed to simulate potentially sustainable levels of tree biomass growth and related nutrient uptake dynamics, was applied to 17 jack pine sites across Canada. The model simulates potential tree biomass growth based on nutrient inputs from estimated atmospheric deposition (N, Ca, Mg, K) and soil weathering (Ca, Mg, K), and matches the resulting nutrient supply rates with calculated nutrient demand. Nutrient demand calculations are based on nutrient concentrations in wood, bark, branches, and foliage. Specifically, the model simulates sustainable annual increment (SAI) of biomass growth for stem-only and whole-tree (aboveground biomass) harvesting, and for recurring forest fire conditions. Calculated SAI levels were compared with field-estimated mean annual increments for aboveground forest biomass (MAI). For recurring forest fires, it was found that SAI values, as simulated, corresponded with the MAI field estimates in general. For whole-tree harvesting, SAI was lower than MAI for most but not all sites. For stem-only harvesting, SAI corresponded with MAI, but there was a greater scatter between SAI and MAI values than what appeared to be the case for the recurring forest fire scenario. Key words: Jack pine; whole-tree, stem-only harvesting; steady-state mass balance; forest biomass; N, Ca, Mg, K growth limitations; atmospheric deposition

GISS Model E2.2: A Climate Model Optimized for the Middle Atmosphere—2. Validation of Large‐Scale Transport and Evaluation of Climate Response

2020 ◽  
Vol 125 (24) ◽  
Author(s):  
Clara Orbe ◽  
David Rind ◽  
Jeffrey Jonas ◽  
Larissa Nazarenko ◽  
Greg Faluvegi ◽  
...  
Keyword(s):  
Large Scale ◽  
Climate Model ◽  
Middle Atmosphere ◽  
Climate Response

Investigation of culture conditions by Response Surface Methodology and kinetic modeling for exopolysaccharide production by Klebsiella oxytoca ICCF 419 strain, using lactose as substrate

2020 ◽  
Vol 25 (6) ◽  
pp. 2033-2044
Author(s):  
CATERINA TOMULESCU ◽  
◽  
MIŞU MOSCOVICI ◽  
ROXANA MĂDĂLINA STOICA ◽  
GABRIEL BUJOR ALBU ◽  
...  
Keyword(s):  
Citric Acid ◽  
Klebsiella Oxytoca ◽  
Fermentation Medium ◽  
Culture Conditions ◽  
Biomass Growth ◽  
Initial Value ◽  
Substrate Consumption ◽  
Polysaccharide Production ◽  
Crude Polysaccharide ◽  
Central Composite

The objective of this work was to optimize the bioprocess parameters, using Klebsiella oxytoca ICCF 419 to obtain an exopolysaccharide based on lactose as substrate. A kinetic study was employed and Logistic and Gompertz models were applied to describe the polysaccharide production, in relation with biomass growth and substrate consumption. The RSM methodology based on Central Composite Rotatable Design was used to evaluate and optimize the effect of lactose, corn extract, KH2PO4 and citric acid concentrations as independent variables on the polysaccharide production, biomass growth and substrate consumption as the response functions. The interaction effects and optimal parameters were obtained using Design Expert Software (version 9.0.6.2). The significance of the variables and their interactions was tested by means of ANOVA analysis with a 99% confidence level. The optimum culture conditions were determined and the model prediction was compared with experimental results. At an initial value of 23.45 for the C/N in the fermentation medium, the strain produces 17.41 g/L of crude polysaccharide and 2.53 g/L dry biomass. The EPS production was significantly influenced by lactose, corn extract and KH2PO4, while the citric acid had no influence. The biomass growth was influenced by the corn extract, KH2PO4 and citric acid.

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