A comparison of species growth rates from four moist tropical forest regions using increment-size ordination

The main purpose of this job is to present the characteristics that influenced the elaboration of the Urucu-Manaus Gas Pipeline Project and the difference between this pipeline and other pipelines already installed on the Amazon region. In this project were emphasized the aspects related to the route definition, mapping technologies that had not been utilized in our pipeline projects, the crossing of vast flooded areas, requiring specific studies, as well the minimization of the environment impacts, in this case the existence of animal species present only in this region. Other differential factor was the Rio Negro crossing, where the pipeline will be installed in the riverbed. The know-how attained with this project consolidates ever so the activity of building pipelines in tropical forest regions.

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Global mechanistic model of SOA formation: effects of different chemical mechanisms

Atmospheric Chemistry and Physics Discussions ◽

10.5194/acpd-11-26347-2011 ◽

2011 ◽

Vol 11 (9) ◽

pp. 26347-26413 ◽

Cited By ~ 1

Author(s):

G. Lin ◽

J. E. Penner ◽

S. Sillman ◽

D. Taraborrelli ◽

J. Lelieveld

Keyword(s):

Tropical Forest ◽

Northern Hemisphere ◽

Model Simulation ◽

Mechanistic Model ◽

Organic Aerosol ◽

The United States ◽

Formation Mechanisms ◽

Free Troposphere ◽

Forest Regions ◽

Aqueous Aerosols

Abstract. Recent experimental findings indicate that Secondary Organic Aerosol (SOA) represents an important and, under many circumstances, the major fraction of the organic aerosol burden. Here, we use a global 3-d model (IMPACT) to test the results of different mechanisms for the production of SOA. The basic mechanism includes SOA formation from organic nitrates and peroxides produced from an explicit chemical formulation, using partition coefficients based on thermodynamic principles. We also include the formation of non-evaporative SOA from the reaction of glyoxal and methylglyoxal on aqueous aerosols and cloud droplets as well as from the reaction of epoxides on aqueous aerosols. A model simulation including these SOA formation mechanisms gives an annual global SOA production of 113.5 Tg. The global production of SOA is substantially decreased to 85.0 Tg yr−1 if the HOx regeneration mechanism proposed by Peeters et al. (2009) is used. Model predictions with and without this HOx regeneration scheme are compared with multiple surface observation datasets, namely: the Interagency Monitoring of Protected Visual Environments (IMPROVE) for the United States, the European Monitoring and Evaluation Programme (EMEP) as well as Aerosol Mass Spectrometry (AMS) data measured in both Northern Hemisphere and tropical forest regions. All model simulations realistically predict the organic carbon mass observed in the Northern Hemisphere, although they tend to overestimate the concentrations in tropical forest regions. This overestimate may result from an unrealistically high uptake rate of glyoxal and methylglyoxal on aqueous aerosols and in cloud drops. The modeled OC in the free troposphere is in agreement with measurements in the ITCT-2K4 aircraft campaign over the North America and in pollution layers in Asia during the INTEX-B campaign, although the model underestimates OC in the free troposphere during the ACE-Asia campaign off the coast of Japan.

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Ecophysiological attributes ofMikania micrantha, an exotic invasive weed, at two different elevations in the tropical forest regions of the Western Ghats, South India

Weed Biology and Management ◽

10.1111/wbm.12033 ◽

2014 ◽

Vol 14 (1) ◽

pp. 59-67 ◽

Cited By ~ 13

Author(s):

N. Ramesh Prabu ◽

N. Stalin ◽

P. Sudhakar Swamy

Keyword(s):

Tropical Forest ◽

Western Ghats ◽

South India ◽

Invasive Weed ◽

Forest Regions ◽

Exotic Invasive ◽

The Western Ghats

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Biomass Growth Rate of Trees from Cameroon Based on 14C Analysis and Growth Models

Radiocarbon ◽

10.1017/s0033822200058045 ◽

2013 ◽

Vol 55 (2) ◽

pp. 885-893 ◽

Cited By ~ 2

Author(s):

J B Tandoh ◽

F Marzaioli ◽

G Battipaglia ◽

M Capano ◽

S Castaldi ◽

...

Keyword(s):

Growth Rate ◽

Tropical Forest ◽

Growth Rates ◽

Growth Models ◽

Cambial Activity ◽

Tropical Region ◽

Detailed Knowledge ◽

Biomass Growth ◽

Annual Growth Rings ◽

Tree Growth Rate

The question of whether the rise in CO2 levels observed during the industrial era has influenced the rates of tree biomass growth represents one of the main unsolved questions in the field of climate change science. In this framework, the African tropical forest represents one of the most important carbon (C) sinks, but detailed knowledge of its response to elevated CO2 is still lacking, especially regarding tree growth rate estimations. A major limitation to determining growth rates in the African tropical region is that many trees lack seasonality in cambial activity determining annual growth rings. In this study, several species of trees characterizing the African tropical forest have been investigated to estimate their biomass growth rate by means of a procedure based on 14C and growth models. A total of 71 subsamples were analyzed for a Entandrophragma cylindricum (sapele) tree, and 38 and 25 wood subsamples for Erythrophleum suaveolens (tali) and Triplochiton scleroxylon (ayous) trees, respectively, using radiocarbon measurements at the Centre for Isotopic Research on Cultural and Environmental Heritage (CIRCE). All measured modern samples were in agreement with the Southern Hemisphere (SH) 14C bomb-spike curve. Observed preliminary results indicate a decrease in the growth rate of the sapele tree (∼350 yr old) in the industrial period compared to the pre-industrial era. Growth rates for trees of the other 2 species were higher than sapele, with ayous being the fastest-growing species.

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Radionuclides of cesium and strontium as indicators of tree growth rate and age: a negative result

Canadian Journal of Forest Research ◽

10.1139/x86-249 ◽

1986 ◽

Vol 16 (6) ◽

pp. 1391-1394

Author(s):

P. W. Rundel ◽

R. Wood

Keyword(s):

Growth Rate ◽

Tropical Forest ◽

Sierra Nevada ◽

Tree Growth ◽

Growth Rates ◽

Forest Trees ◽

Large Wood ◽

Tissue Samples ◽

Tree Growth Rate ◽

Nuclear Weapon Tests

Recent suggestions have been made that the peak 1963 concentrations of 137Cs and 90Sr in the atmosphere, resulting from nuclear weapon tests, could be used as a marker to estimate growth rates and age in tropical forest trees where no rings are present. Neither wet- nor dry-ashed tissue samples of either radionuclide could be detected in analyses of large wood samples of Abiesmagnifica from the Sierra Nevada. These results suggest that if Abies woody tissues are typical, then sufficient concentrations of radionuclides of cesium and strontium to allow estimations of growth rates and ages will not be present in the trunks of tropical forest trees.

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Data on the effects of fertilization on growth rates, biomass allocation, carbohydrates and nutrients of nitrogen-fixing and non-nitrogen-fixing tree legumes during tropical forest restoration

BMC Research Notes ◽

10.1186/s13104-021-05552-5 ◽

2021 ◽

Vol 14 (1) ◽

Author(s):

Roberto K. Jaquetti ◽

José Francisco C. Gonçalves

Keyword(s):

Tropical Forest ◽

Biomass Allocation ◽

Growth Rates ◽

Forest Restoration ◽

Meta Analysis ◽

Nutrient Deficiency ◽

Legume Species ◽

Forest Plantation ◽

Nitrogen Fixing ◽

Tree Legume

Abstract Objectives Tree legume species play an important role in forest restoration in the tropics. Understanding how different species adjust carbohydrate allocation and growth under distinct nutrient availability will enhance the success of restoring degraded areas. Data description A 2-year tropical forest plantation of the Forest Restoration Program of the Balbina Hydropower Dam was evaluated. Three non-N-fixing (Cenostigma tocantinum, Dipteryx odorata and Senna reticulata) and three N-fixing (Clitoria fairchildiana, Inga edulis and Acacia spp.) tree legume species were either fertilized or not fertilized. Growth rates and biomass allocation were calculated, and carbon (C) fractions and nitrogen (N), phosphorus (P) and nonstructural carbohydrate (NSC) concentrations were determined. Multiple nutrient additions increased the growth rates and aboveground biomass production of fertilized plants. According to the results presented, different species and N- fixers respond differently to fertilization regimes. The authors encourage the use of the presented data in meta-analysis studies that consider the fertilization or nutrient deficiency effects on growth, carbohydrate and nutrient responses. N-fixing species with high biomass growth and foliar N are important for restoring N and C cycles in nutrient-limited soils. Fertilization treatments are fundamental during the early stages of forest plantation development.

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