Estimation of primary forest harvest residues and potential bioenergy production from fast-growing tree species in NW Spain

2021 ◽  
Vol 148 ◽  
pp. 106055
Author(s):  
Esteban Gómez-García
Keyword(s):  
Tree Species ◽  
Primary Forest ◽  
Forest Harvest ◽  
Nw Spain ◽  
Harvest Residues ◽  
Fast Growing ◽  
Bioenergy Production

PHYSICAL AND MECHANICAL PROPERTIES OF GLUED-LAMINATED LUMBER FROM FAST-GROWING TREE SPECIES USING MAHOGANY TANNIN ADHESIVE

2019 ◽  
Vol 51 (2) ◽  
pp. 132-143
Author(s):  
Andi Sri Rahayu Diza Lestari ◽  
Yusuf Sudo Hadi ◽  
Dede Hermawan ◽  
Adi Santoso ◽  
Antonio Pizzi
Keyword(s):  
Mechanical Properties ◽  
Tree Species ◽  
Physical And Mechanical Properties ◽  
Tannin Adhesive ◽  
Fast Growing

scholarly journals PRESERVATION OF PRIMARY FOREST CHARACTERISTICS DESPITE FRAGMENTATION AND ISOLATION IN A FOREST REMNANT FROM VIÇOSA, MG, BRAZIL1

2015 ◽  
Vol 39 (6) ◽  
pp. 985-994 ◽  
Author(s):  
Markus Gastauer ◽  
Marcos Eduardo Guerra Sobral ◽  
João Augusto Alves Meira-Neto
Keyword(s):  
Species Richness ◽  
Endemic Species ◽  
Tree Species ◽  
Primary Forest ◽  
Forest Patch ◽  
Diameter At Breast Height ◽  
Breast Height ◽  
Forest Remnant ◽  
Primary Forests ◽  
Biotic Resources

According to its owners, the Forest of Seu Nico (FSN) from the Viçosa municipality, Minas Gerais, Brazil, never has been logged and is therefore considered a primary forest. Nevertheless, the forest patch suffered impacts due to selective wood and non-timber extraction, fragmentation and isolation. Aim of this study was to test if the FSN, despite impacts, preserved characteristics of primary forests, which are elevated percentages of non-pioneer (>90%), animal-dispersed (>80 %), understory (>50%) and endemic species (~40%). For that, all trees with diameter at breast height equal or major than 3.2 cm within a plot of 100 x 100 m were identified. With 218 tree species found within this hectare, the FSN's species richness is outstanding for the region. The percentages of non-pioneer (92 %), animal-dispersed (85 %), understory (55 %) and endemic species (39.2 %) from the FSN fulfill the criteria proposed for primary forest. Therefore, we conclude that the FSN maintained its characteristics as a primary forest which highlights its importance for the conservation of biotic resources in the region, where similar fragments are lacking or not described yet.

scholarly journals Towards Conservation of Genetic Variation of Tropical Tree Species With Differing Successional Status: The Case of Mansonia altissima A. Chev and Triplochiton scleroxylon K. Schum

2019 ◽  
Vol 12 ◽  
pp. 194008291986426
Author(s):  
Akin Akinnagbe ◽  
Oliver Gailing ◽  
Reiner Finkeldey ◽  
Amadu Lawal
Keyword(s):  
Genetic Diversity ◽  
Human Impact ◽  
Tree Species ◽  
Human Impacts ◽  
Genetic Erosion ◽  
Primary Forest ◽  
Timber Species ◽  
Pioneer Species ◽  
Forest Patch ◽  
Successional Status

Two important West African timber tree species with differing successional status, Mansonia altissima A. Chev and Triplochiton scleroxylon K. Schum were investigated in this study. Triplochiton scleroxylon is a pioneer species found in open forests, whereas Mansonia altissima is a nonpioneer light-demanding tree species occurring in closed forests. Amplified fragment length polymorphism markers were used to compare the genetic diversities of these two timber species in stands with different degrees of human impact (isolated forest patch, logged forest, farmland, plantation, and primary forest). Contrasting effects of human impact on genetic diversity were detected for these two timber species. The results suggested severe effects of human impact on the genetic diversity of Mansonia altissima, a nonpioneer species. However, no adverse effect was recorded in Triplochiton scleroxylon, a pioneer species. These findings indicate that nonpioneer tree species could be more prone to genetic erosion than pioneer tree species as a result of adverse human impacts. Therefore, conservation of genetic diversity in both pioneer and nonpioneer tree species populations would likely necessitate different measures.

Economic implications of grinding, transporting, and pretreating fresh versus aged forest residues for biofuel production

2017 ◽  
Vol 47 (2) ◽  
pp. 269-276 ◽  
Author(s):  
Rene Zamora-Cristales ◽  
John Sessions ◽  
Gevan Marrs
Keyword(s):  
Moisture Content ◽  
Bulk Density ◽  
Economic Effect ◽  
Transportation Cost ◽  
Biofuel Production ◽  
Forest Residues ◽  
Forest Harvest ◽  
Economic Implications ◽  
Harvest Residues ◽  
The Difference

The moisture content in forest harvest residues is a key factor affecting the supply cost for bioenergy production. Fresh harvest residues tend to contain higher amounts of water, thus making transportation inefficient. Additionally, fresh harvest residues contain greater amounts of needles and bark that may reduce the polysaccharide content, thus affecting the production of liquid fuels derived from cellulosic components. In this study, we estimated the downstream economic effect in the supply chain of collecting, grinding, transporting and pretreating fresh versus aged residues. Specifically, we analyzed the effect of feedstock moisture content on grinder fuel consumption, bulk density, bark and needle content, and polysaccharide proportion. Fresh forest harvest residues were 60% moisture content (wet basis) and aged forest residues were 15% moisture content. The bark and needle proportion is 6.1% higher in fresh residue than in aged residue. Polysaccharides were 26% higher in aged residue than in fresh residue. On a dry-tonne basis, the cost of grinding fresh residues was about the same as that of aged residues. However, considering the difference in bulk density on transportation cost and the difference in polysaccharide yield, the value gain for in-field drying ranges from US$29.60 to US$74.90 per ovendry tonne.

scholarly journals Screening Potential Bioenergy Production of Tree Species in Degraded and Marginal Land in the Tropics

Forests ◽  
2018 ◽  
Vol 9 (10) ◽  
pp. 594 ◽  
Author(s):  
Nils Borchard ◽  
Medha Bulusu ◽  
Ann-Michelle Hartwig ◽  
Matthias Ulrich ◽  
Soo Lee ◽  
...  
Keyword(s):  
Tree Species ◽  
Energy Demand ◽  
Woody Species ◽  
Pongamia Pinnata ◽  
Energy Yield ◽  
Mixed Stands ◽  
Elaeis Oleifera ◽  
Bioenergy Production ◽  
The Usa ◽  
Metroxylon Sagu

Bioenergy can produce at least 25% of the global energy demand to combat climate change through reducing emissions in the energy sector. However, information on the bioenergy production potential of woody species and their suitability for silviculture on various soils in the humid tropics is limited. This review aims to identify tree species suitable for bioenergy production under these conditions. Data were compiled from 241 publications and nine freely available databases to assess environmental and silvicultural information on tropical tree species. Energy outputs were derived from the estimated productivity of the reviewed species and ranged from 0.2 to 24.0 Mg biomass ha−1 yr−1, 0.1 to 9.0 Mg bio-oil ha−1 yr−1, and 0.2 to 20.0 Mg sugar ha−1 yr−1, equivalent to an energy yield between 2 and 444 GJ ha−1 yr−1. As such, these bioenergy yields are within the range reported for the lignocellulosic biomass of energy crops cultivated in Europe, the USA, and Brazil. Our review identified some high-yielding species (e.g., Dyera polyphylla (Miq.) Steenis, Metroxylon sagu (Rottb.), Pongamia pinnata (L.)) and leguminous species that could be beneficial in mixed stands (e.g., Elaeis oleifera (Kunth) and Pongamia pinnata) or are suitable species to grow on wet or re-wetted peatland (Dyera polyphylla). However, there are limitations to cultivate woody bioenergy species on wet peatland. Sustainable methods for managing and harvesting forests, particularly on wet or re-wetted peatland, need to be developed.

Night and daytime water relations in five fast-growing tree species: Effects of environmental and endogenous variables

Ecohydrology ◽  
2017 ◽  
Vol 11 (6) ◽  
pp. e1927 ◽  
Author(s):  
Priit Kupper ◽  
Hiie Ivanova ◽  
Anu Sõber ◽  
Gristin Rohula-Okunev ◽  
Arne Sellin
Keyword(s):  
Water Relations ◽  
Tree Species ◽  
Fast Growing ◽  
Species Effects ◽  
Endogenous Variables ◽  
Tree Species Effects

Is the alien tree species Maesopsis eminii Engl. (Rhamnaceae) a threat to tropical forest conservation in the East Usambaras, Tanzania?

2000 ◽  
Vol 27 (1) ◽  
pp. 76-81 ◽  
Author(s):  
J. VIISTEENSAARI ◽  
S. JOHANSSON ◽  
V. KAARAKKA ◽  
O. LUUKKANEN
Keyword(s):  
Tree Species ◽  
Woody Species ◽  
Systematic Sampling ◽  
Primary Forest ◽  
Conservation Area ◽  
Tropical Forest Conservation ◽  
Pioneer Tree ◽  
Local Species ◽  
Spontaneous Regeneration ◽  
Maesopsis Eminii

The East Usambara mountains are globally important for biodiversity conservation. The work reported here aimed to clarify whether plantations of Maesopsis eminii, an introduced pioneer tree, are a source of alien tree invasion or a temporary element in a protected conservation forest ecosystem in these mountains. The natural regeneration dynamics of M. eminii and indigenous primary tree species were assessed in M. eminii plantations which were up to 35 years old, using clustered systematic sampling. A total of 103 and 95 woody species were observed in the sapling and lower canopy layers, respectively. Both layers showed an abundance of Cephalosphaera usambarensis, a local species also used in plantations. M. eminii was virtually absent in the sapling layer, and its frequency decreased in the lower canopy with time. Abundant spontaneous regeneration of native primary forest species occurred under M. eminii. The sapling density of Allanblackia stuhlmannii, Beilschmiedia kweo and Greenwayodendron suaveolens increased, and that of Newtonia buchananii decreased, with time. In the lower canopy, the density of G. suaveolens, Parinari excelsa and Strombosia scheffleri increased in relation to plantation age. Therefore, no active, risky eradication of Maesopsis is needed in the conservation area, but a priority management task should be to avoid canopy gaps.

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