Effects of clear-cutting and soil preparation on natural15N abundance in the soil and needles of two boreal conifer tree species

2006 ◽  
Vol 42 (4) ◽  
pp. 367-377 ◽  
Author(s):  
Shambu P. Sah ◽  
Hannu Ilvesniemi
Keyword(s):  
Tree Species ◽  
Clear Cutting ◽  
Soil Preparation ◽  
Conifer Tree ◽  
Natural15n Abundance

scholarly journals A test of the hydraulic vulnerability segmentation hypothesis in angiosperm and conifer tree species

2016 ◽  
Vol 36 (8) ◽  
pp. 983-993 ◽  
Author(s):  
Daniel M. Johnson ◽  
Remi Wortemann ◽  
Katherine A. McCulloh ◽  
Lionel Jordan-Meille ◽  
Eric Ward ◽  
...  
Keyword(s):  
Tree Species ◽  
Hydraulic Vulnerability ◽  
Conifer Tree

scholarly journals Erratum to “Physiological Effects of Smoke Exposure on Deciduous and Conifer Tree Species”

2012 ◽  
Vol 2012 ◽  
pp. 1-1
Author(s):  
W. John Calder ◽  
Greg Lifferth ◽  
Max A. Moritz ◽  
Samuel B. St. Clair
Keyword(s):  
Tree Species ◽  
Smoke Exposure ◽  
Physiological Effects ◽  
Conifer Tree

Smoke Production Ability during Combustion of the Four Conifer-Tree Species in Hei Long Jiang Province

2011 ◽  
Vol 183-185 ◽  
pp. 1389-1394
Author(s):  
Long Sun ◽  
Hai Qing Hu ◽  
Lin Ju
Keyword(s):  
Carbon Dioxide ◽  
Tree Species ◽  
Thermal Characteristics ◽  
Larix Gmelinii ◽  
Pinus Koraiensis ◽  
Calorimetric Analysis ◽  
Inhibiting Effect ◽  
Smoke Production ◽  
Conifer Tree ◽  
Carbon Dioxide Co2

The combustibility of four conifer-tree species in Xiaoxing’an Mountain, Heilongjiang Province was studied by cone calorimetric analysis. The four species were Pinus koraiensis Sieb.et Zucc、Pinus sylvestris var.mongolica Litv、Picea koraiensis Nakai、Larix gmelinii Rupr.. The thermal characteristics of leaves and barks, including smoke production rate(SPR)、specific extinction area(SEA)、the concentration of carbon dioxide (CO2)、the production of carbon dioxide ( PCO2 )、the concentration of carbon dioxide (CO)、the production of carbon dioxide ( PCO )were tested and recorded simultaneously.Th results showed that ,at a heat reflux of 50 kW•m-2, the values of SPR , SEA , the concentration of carbon dioxide (CO2) and the production of carbon dioxide (PCO) of Larix gmelinii Rupr. t had strong smoke inhibiting effect. Both Larix gmelinii Rupr. and Pinus koraiensis Sieb.et Zucc had strong smoke inhibiting effect, and Larix gmelinii Rupr. and Pinus koraiensis Sieb.et Zucc was most recommended as fire resistance species for fire-preventing forest belts.

scholarly journals How Can Litter Modify the Fluxes of CO2 and CH4 from Forest Soils? A Mini-Review

Forests ◽  
2021 ◽  
Vol 12 (9) ◽  
pp. 1276
Author(s):  
Anna Walkiewicz ◽  
Adrianna Rafalska ◽  
Piotr Bulak ◽  
Andrzej Bieganowski ◽  
Bruce Osborne
Keyword(s):  
Climate Change ◽  
Forest Soils ◽  
Tree Species ◽  
Water Movement ◽  
C Sequestration ◽  
Climatic Conditions ◽  
Tree Species Composition ◽  
Clear Cutting ◽  
And Shifts ◽  
The Impact

Forests contribute strongly to global carbon (C) sequestration and the exchange of greenhouse gases (GHG) between the soil and the atmosphere. Whilst the microbial activity of forest soils is a major determinant of net GHG exchange, this may be modified by the presence of litter through a range of mechanisms. Litter may act as a physical barrier modifying gas exchange, water movement/retention and temperature/irradiance fluctuations; provide a source of nutrients for microbes; enhance any priming effects, and facilitate macro-aggregate formation. Moreover, any effects are influenced by litter quality and regulated by tree species, climatic conditions (rainfall, temperature), and forest management (clear-cutting, fertilization, extensive deforestation). Based on climate change projections, the importance of the litter layer is likely to increase due to an litter increase and changes in quality. Future studies will therefore have to take into account the effects of litter on soil CO2 and CH4 fluxes for various types of forests globally, including the impact of climate change, insect infestation, and shifts in tree species composition, as well as a better understanding of its role in monoterpene production, which requires the integration of microbiological studies conducted on soils in different climatic zones.

scholarly journals Early Survival and Growth Plasticity of 33 Species Planted in 38 Arboreta across the European Atlantic Area

Forests ◽  
2018 ◽  
Vol 9 (10) ◽  
pp. 630 ◽  
Author(s):  
Henrique Correia ◽  
Helena Almeida ◽  
Manuela Branco ◽  
Margarida Tomé ◽  
Rebeca Cordero Montoya ◽  
...  
Keyword(s):  
Tree Species ◽  
Pinus Elliottii ◽  
Pinus Nigra ◽  
Thuja Plicata ◽  
Growth And Survival ◽  
Tree Survival ◽  
Conifer Tree ◽  
Dryness Index ◽  
Survival And Growth ◽  
Ceratonia Siliqua L

To anticipate European climate scenarios for the end of the century, we explored the climate gradient within the REINFFORCE (RÉseau INFrastructure de recherche pour le suivi et l’adaptation des FORêts au Changement climatiquE) arboreta network, established in 38 sites between latitudes 37° and 57°, where 33 tree species are represented. We aim to determine which climatic variables best explain their survival and growth, and identify those species that are more tolerant of climate variation and those of which the growth and survival future climate might constrain. We used empirical models to determine the best climatic predictor variables that explain tree survival and growth. Precipitation-transfer distance was most important for the survival of broadleaved species, whereas growing-season-degree days best explained conifer-tree survival. Growth (annual height increment) was mainly explained by a derived annual dryness index (ADI) for both conifers and broadleaved trees. Species that showed the greatest variation in survival and growth in response to climatic variation included Betula pendula Roth, Pinus elliottii Engelm., and Thuja plicata Donn ex D.Don, and those that were least affected included Quercus shumardii Buckland and Pinus nigra J.F.Arnold. We also demonstrated that provenance differences were significant for Pinus pinea L., Quercus robur L., and Ceratonia siliqua L. Here, we demonstrate the usefulness of infrastructures along a climatic gradient like REINFFORCE to determine major tendencies of tree species responding to climate changes.

Structure of mixed pine and hardwood stands 12 years after various methods and intensities of site preparation in the Georgia Piedmont

1996 ◽  
Vol 26 (8) ◽  
pp. 1490-1500 ◽  
Author(s):  
Timothy B. Harrington ◽  
M. Boyd Edwards
Keyword(s):  
Species Richness ◽  
Tree Species ◽  
Low Cost ◽  
Basal Area ◽  
Diversity Indices ◽  
Site Preparation ◽  
Clear Cut ◽  
Clear Cutting ◽  
Georgia Piedmont ◽  
Compensatory Effect

In the Georgia Piedmont (U.S.A.), size, abundance, and species diversity of trees were quantified in a plantation of Pinustaeda L. 12 years after various methods and intensities of site preparation. In clear-cut only versus site-prepared plots, greater hardwood abundance (27% vs. 8% of the total basal area) and size (8.6 vs. 7.4 m in height) were associated with reduced pine volume (73 vs. 123 m3/ha) and increased Simpson and Shannon diversity indices. Tree-species richness was greater in plots where residual trees from clear-cutting had been removed with a chainsaw versus large machinery (10 vs. 7 species). With increasing site-preparation intensity, reductions in basal area of volunteer pines coincided with proportionate increases (R2 = 0.80) in basal area of planted pines. As a result of this compensatory effect, total volume of all pines varied little (122–134 m3/ha) among site-preparation intensities. Research results suggest that site-preparation treatments can be selected to facilitate the development of a variety of stand structures, including those that favor evenness (clear-cut only) or richness (manual cutting) of tree species, low-cost production of pine fiber (manual cutting), and stand uniformity for management of pine sawtimber (mechanical and herbicide).

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