scholarly journals The role of canopy structural complexity in wood net primary production of a maturing northern deciduous forest

Ecology ◽  
2011 ◽  
Vol 92 (9) ◽  
pp. 1818-1827 ◽  
Author(s):  
Brady S Hardiman ◽  
Gil Bohrer ◽  
Christopher M Gough ◽  
Christoph S Vogel ◽  
Peter S Curtis
Keyword(s):  
Primary Production ◽  
Deciduous Forest ◽  
Net Primary Production ◽  
Structural Complexity

Energy and nutrients

2019 ◽  
pp. 161-176
Author(s):  
Richard T. Corlett
Keyword(s):  
Primary Production ◽  
Forest Ecology ◽  
Net Primary Production ◽  
Ecosystem Respiration ◽  
Gross Primary Production ◽  
Nitrogen And Phosphorus ◽  
New Information ◽  
Tropical Forest Ecology ◽  
Toxic Concentrations

This chapter deals with the ecology of Tropical East Asia from the perspective of water, energy, and matter flows through ecosystems, particularly forests. Data from the network of eddy flux covariance towers is revealing general patterns in gross primary production, ecosystem respiration, and net ecosystem production, and exchange. There is also new information on the patterns of net primary production and biomass within the region. In contrast, our understanding of the role of soil nutrients in tropical forest ecology still relies mostly on work done in the Neotropics, with just enough data from Asia to suggest that the major patterns may be pantropical. Nitrogen and phosphorus have received most attention regionally, followed by calcium, potassium, and magnesium, and there has been very little study of the role of micronutrients and potentially toxic concentrations of aluminium, manganese, and hydrogen ions. Animal nutrition has also been neglected.

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

The Role of Remote Sensing in the Study of Terrestrial Net Primary Production

2007 ◽  
pp. 204-237 ◽  
Author(s):  
Scott V. Ollinger ◽  
Robert N. Treuhaft ◽  
Bobby H. Braswell ◽  
Jeanne E. Anderson ◽  
Mary E. Martin ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Primary Production ◽  
Net Primary Production

scholarly journals Moderate forest disturbance as a stringent test for gap and big-leaf models

2015 ◽  
Vol 12 (2) ◽  
pp. 513-526 ◽  
Author(s):  
B. Bond-Lamberty ◽  
J. P. Fisk ◽  
J. A. Holm ◽  
V. Bailey ◽  
G. Bohrer ◽  
...  
Keyword(s):  
Primary Production ◽  
Tree Mortality ◽  
Net Primary Production ◽  
Forest Disturbance ◽  
Gross Primary Production ◽  
Structural Complexity ◽  
Terrestrial Ecosystem ◽  
Ecosystem Models ◽  
Area Index ◽  
C Cycle

Abstract. Disturbance-induced tree mortality is a key factor regulating the carbon balance of a forest, but tree mortality and its subsequent effects are poorly represented processes in terrestrial ecosystem models. It is thus unclear whether models can robustly simulate moderate (non-catastrophic) disturbances, which tend to increase biological and structural complexity and are increasingly common in aging US forests. We tested whether three forest ecosystem models – Biome-BGC (BioGeochemical Cycles), a classic big-leaf model, and the ZELIG and ED (Ecosystem Demography) gap-oriented models – could reproduce the resilience to moderate disturbance observed in an experimentally manipulated forest (the Forest Accelerated Succession Experiment in northern Michigan, USA, in which 38% of canopy dominants were stem girdled and compared to control plots). Each model was parameterized, spun up, and disturbed following similar protocols and run for 5 years post-disturbance. The models replicated observed declines in aboveground biomass well. Biome-BGC captured the timing and rebound of observed leaf area index (LAI), while ZELIG and ED correctly estimated the magnitude of LAI decline. None of the models fully captured the observed post-disturbance C fluxes, in particular gross primary production or net primary production (NPP). Biome-BGC NPP was correctly resilient but for the wrong reasons, and could not match the absolute observational values. ZELIG and ED, in contrast, exhibited large, unobserved drops in NPP and net ecosystem production. The biological mechanisms proposed to explain the observed rapid resilience of the C cycle are typically not incorporated by these or other models. It is thus an open question whether most ecosystem models will simulate correctly the gradual and less extensive tree mortality characteristic of moderate disturbances.

The role of climate variability in the inter-annual variation of terrestrial net primary production (NPP)

2004 ◽  
Vol 332 (1-3) ◽  
pp. 123-137 ◽  
Author(s):  
M.A.A. Mohamed ◽  
I.S. Babiker ◽  
Z.M. Chen ◽  
K. Ikeda ◽  
K. Ohta ◽  
...  
Keyword(s):  
Climate Variability ◽  
Primary Production ◽  
Annual Variation ◽  
Net Primary Production

scholarly journals Missing the forest for the trees: A reappraisal of global seaweed carbon sequestration

2021 ◽  
Author(s):  
John Barry Gallagher ◽  
Victor Shelamoff ◽  
Cayne Layton
Keyword(s):  
Carbon Sequestration ◽  
Primary Production ◽  
Carbon Balance ◽  
Net Primary Production ◽  
Deep Ocean ◽  
Atmospheric Exchange ◽  
Ecosystem Production ◽  
Global Carbon ◽  
Metabolic Carbon

AbstractCurrently, global seaweed carbon sequestration estimates are taken as the fraction of the net primary production (NPP) exported to the deep ocean. The implication is that export is equivalent to net ecosystem production (NEP), and sequestration is the fraction of export that survives remineralisation. However, this perspective does not account for CO2 production fuelled by the consumption of coastal and terrigenous subsidies. Here we clarify: i) the role of export relative to seaweed NEP for systems closed and open to subsidies; and ii) the importance of subsidies by compiling published estimates of NEP from seaweed-dominated ecosystems; and iii) discuss their impact on the global seaweed carbon balance and other sequestration constraints as a mitigation service. Literature values of seaweed NEP were sparse (n = 18) and highly variable. Nevertheless, the average NEP (−9.2mmol C m-2 day-1 SE ± 11.6) suggested that seaweed ecosystems are more likely to be a global source of CO2. Moreover, the seaweeds’ global carbon balance became overwhelmingly heterotrophic (−40.6mmol C m-2 day-1) after accounting for the consumption of exported material. Critically, however, mitigation of greenhouse gas emissions must be assessed relative to their replacements ecosystems or states. We found replacement ecosystems such as shellfish reefs and turfs were notably more heterotrophic than seaweed systems, whilst urchin barrens were only marginally less than their seaweed counterparts; a ranking that appeared to be sustained after their amount of exported production had been remineralised. However, in circumstances where CO2 is supplied independently of organic metabolism and atmospheric exchange (e.g. upwelling and calcification), we caution the sole reliance on NEP or NPP in mitigation assessments. Nevertheless, a complete metabolic carbon balance relative to replacement states will ensure a more accurate mitigation assessment, one that does not exceed the capacity of these ecosystems.

The role of sky conditions on gross primary production in a mixed deciduous forest

2011 ◽  
Vol 151 (7) ◽  
pp. 781-791 ◽  
Author(s):  
A.J. Oliphant ◽  
D. Dragoni ◽  
B. Deng ◽  
C.S.B. Grimmond ◽  
H.-P. Schmid ◽  
...  
Keyword(s):  
Primary Production ◽  
Deciduous Forest ◽  
Gross Primary Production ◽  
Mixed Deciduous Forest ◽  
Sky Conditions
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