scholarly journals Global Patterns in Net Primary Production Allocation Regulated by Environmental Conditions and Forest Stand Age: A Model‐Data Comparison

2019 ◽  
Vol 124 (7) ◽  
pp. 2039-2059 ◽  
Author(s):  
Jiangzhou Xia ◽  
Wenping Yuan ◽  
Sebastian Lienert ◽  
Fortunat Joos ◽  
Philippe Ciais ◽  
...  
Keyword(s):  
Primary Production ◽  
Environmental Conditions ◽  
Net Primary Production ◽  
Forest Stand ◽  
Stand Age ◽  
Model Data ◽  
Data Comparison ◽  
Production Allocation ◽  
Global Patterns

scholarly journals Is NPP proportional to GPP? Waring’s hypothesis 20 years on

2019 ◽  
Vol 39 (8) ◽  
pp. 1473-1483 ◽  
Author(s):  
A Collalti ◽  
I C Prentice
Keyword(s):  
Standard Deviation ◽  
Primary Production ◽  
Net Primary Production ◽  
Gross Primary Production ◽  
Secondary Compounds ◽  
Forest Stand ◽  
Stand Age ◽  
Plant Tissues ◽  
Autotrophic Respiration ◽  
Central Value

Abstract Gross primary production (GPP) is partitioned to autotrophic respiration (Ra) and net primary production (NPP), the latter being used to build plant tissues and synthesize non-structural and secondary compounds. Waring et al. (1998; Net primary production of forests: a constant fraction of gross primary production? Tree Physiol 18:129–134) suggested that a NPP:GPP ratio of 0.47 ± 0.04 (SD) is universal across biomes, tree species and stand ages. Representing NPP in models as a fixed fraction of GPP, they argued, would be both simpler and more accurate than trying to simulate Ra mechanistically. This paper reviews progress in understanding the NPP:GPP ratio in forests during the 20 years since the Waring et al. paper. Research has confirmed the existence of pervasive acclimation mechanisms that tend to stabilize the NPP:GPP ratio and indicates that Ra should not be modelled independently of GPP. Nonetheless, studies indicate that the value of this ratio is influenced by environmental factors, stand age and management. The average NPP:GPP ratio in over 200 studies, representing different biomes, species and forest stand ages, was found to be 0.46, consistent with the central value that Waring et al. proposed but with a much larger standard deviation (±0.12) and a total range (0.22–0.79) that is too large to be disregarded.

scholarly journals Global and Regional Variability and Change in Terrestrial Ecosystems Net Primary Production and NDVI: A Model-Data Comparison

2016 ◽  
Vol 8 (3) ◽  
pp. 177 ◽  
Author(s):  
Rashid Rafique ◽  
Fang Zhao ◽  
Rogier de Jong ◽  
Ning Zeng ◽  
Ghassem Asrar
Keyword(s):  
Primary Production ◽  
Net Primary Production ◽  
Terrestrial Ecosystems ◽  
Model Data ◽  
Regional Variability ◽  
Data Comparison

Biometric based estimates of net primary production (NPP) in a cool-temperate deciduous forest stand beneath a flux tower

2005 ◽  
Vol 134 (1-4) ◽  
pp. 27-38 ◽  
Author(s):  
Toshiyuki Ohtsuka ◽  
Tsuyoshi Akiyama ◽  
Yasushi Hashimoto ◽  
Motoko Inatomi ◽  
Toru Sakai ◽  
...  
Keyword(s):  
Primary Production ◽  
Deciduous Forest ◽  
Net Primary Production ◽  
Forest Stand ◽  
Temperate Deciduous Forest ◽  
Flux Tower ◽  
Cool Temperate ◽  
Temperate Deciduous

scholarly journals Global patterns in human consumption of net primary production

Nature ◽  
2004 ◽  
Vol 429 (6994) ◽  
pp. 870-873 ◽  
Author(s):  
Marc L. Imhoff ◽  
Lahouari Bounoua ◽  
Taylor Ricketts ◽  
Colby Loucks ◽  
Robert Harriss ◽  
...  
Keyword(s):  
Primary Production ◽  
Net Primary Production ◽  
Human Consumption ◽  
Global Patterns

Nutrient Cycling in a Eucalyptus obliqua (L'hérit.) Forest. III. Growth, Biomass, and Net Primary Production

1979 ◽  
Vol 27 (4) ◽  
pp. 439 ◽  
Author(s):  
PM Attiwill
Keyword(s):  
Primary Production ◽  
Net Primary Production ◽  
Biomass Accumulation ◽  
The United States ◽  
Stand Age ◽  
Heartwood Formation ◽  
Tree Diameter ◽  
Eastern Australia ◽  
Independent Variable ◽  
Metabolic Transport

The biomass of Eucalyptus obliqua forest in south-eastern Australia was estimated over a 22-year period by using allometric relationships in which tree diameter was the independent variable. Biomass increased from 24 kg m-2 at a stand age of 44 years to 37 kg m-2 at 66 years. Maximum net primary production (NPP) was 1.4 kg m-2 year-1. Biomass accumulation ratios (biomass/NPP) follow a trajectory with age which fits closely R. H. Whittaker's work in temperate forests of the United States. It is proposed that the growth of forests is regulated within three definable and sequential stages: (i) growth of the photosynthetic display and of the metabolic transport system, (ii)development of heartwood as a support structure system, and (iii) maintenance of the ecosystem through the production of litter. Essential to this view is the recognition of heartwood formation as a growth-regulating process rather than as the end-result of an ageing process.

Estimating net primary production of forests in the Canadian Prairie Provinces using an inventory-based carbon budget model

2002 ◽  
Vol 32 (1) ◽  
pp. 161-169 ◽  
Author(s):  
Zhong Li ◽  
Michael J Apps ◽  
E Banfield ◽  
Werner A Kurz
Keyword(s):  
Primary Production ◽  
Carbon Budget ◽  
Fine Root ◽  
Net Primary Production ◽  
Root Turnover ◽  
Stand Age ◽  
Parameter Estimates ◽  
Budget Model ◽  
Carbon Budget Model ◽  
Prairie Provinces

The Carbon Budget Model of the Canadian Forest Sector (CBM-CFS2) is a forest inventory-based ecosystem simulation model. It has been used previously for both retrospective and projective analyses of the carbon pools and fluxes of the Canadian forest ecosystems at the national, regional, and stand level. The objective of this study was to determine and evaluate forest net primary production (NPP) in the three Prairie Provinces in west-central Canada, as estimated by the model. The model simulated an averaged aboveground NPP (NPPA) of 172 g C·m–2·year–1 for the regional forests, varying from 72 to 293 g C·m–2·year–1, depending on ecoclimatic province, forest type, age, and site productivity. Comparisons of NPPA estimates for the boreal forest (165–179 g C·m–2·year–1) with results from direct measurements, modeling, and empirical calculations show that the CBM-CFS2 produced reasonable estimates of NPPA. The model incorporates different types of disturbances such as wildfire, harvesting, and insects and is able to evaluate NPP changes with stand age. However, belowground NPP may be overestimated, especially for young and unproductive stands. This can be explained by the current parameter estimates for the fine-root component of belowground biomass and for fine-root turnover rates.

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