scholarly journals Relation of Canopy Area and Volume to Production of Three Woody Species

Ecology ◽  
1970 ◽  
Vol 51 (6) ◽  
pp. 1098-1101 ◽  
Author(s):  
James M. Peek
Keyword(s):  
Woody Species ◽  
Canopy Area ◽  
Area And Volume

On the interest of penetration depth, canopy area and volume metrics to improve Lidar-based models of forest parameters

2016 ◽  
Vol 175 ◽  
pp. 32-42 ◽  
Author(s):  
Cédric Véga ◽  
Jean-Pierre Renaud ◽  
Sylvie Durrieu ◽  
Marc Bouvier
Keyword(s):  
Penetration Depth ◽  
Canopy Area ◽  
Area And Volume

Use of growth characteristics for predicting plant age of three obligate-seeder Proteaceae species

2005 ◽  
Vol 53 (2) ◽  
pp. 101 ◽  
Author(s):  
Meaghan E. Jenkins ◽  
David A. Morrison ◽  
Tony D. Auld
Keyword(s):  
Management Strategies ◽  
Growth Characteristics ◽  
Plant Age ◽  
Large Spatial Scale ◽  
Obligate Seeder ◽  
Canopy Area ◽  
Banksia Ericifolia ◽  
Volume Estimates ◽  
Age Estimates ◽  
Area And Volume

We tested the ability to predict plant (and hence population) age for three fire-sensitive obligate-seeder Proteaceae species (Banksia ericifolia, Banksia marginata and Petrophile pulchella) in the heath and woodland vegetation of the Sydney region. To do this we sampled the number of growth whorls, as well as other growth characteristics (stem girth and height measurements, and canopy area and volume estimates), in areas of known time since last fire (TSLF). The average number of growth whorls was a very good predictor of plant age for both Banksia species (R2 = 98%, 99%), but this needed to be corrected for linear underestimation in P. pulchella (R2 = 92%). This technique could successfully be applied to these species in similar habitats across a large spatial scale, and so this information can be used to determine the age of a population in areas of unknown TSLF. A sample size of 15 plants was sufficient for accurate age estimates of all species; however, better estimates of TSLF for a particular plant community were obtained when estimates from two or more of the species were combined. We thus provide empirical evidence for the validity and accuracy of the growth-whorl technique for predicting plant age and hence TSLF. This information will assist in informing the development of appropriate management strategies for plants in relation to fire. Of the other growth characteristics studied, stem girth was the most reliable predictor; however, in general these other characteristics had wide confidence intervals on the predictions for sites greater than 10 years TSLF, owing to a non-linear relationship with age.

Response of woody species to different fire frequencies in semiarid rangelands of central Argentina

2012 ◽  
Vol 34 (2) ◽  
pp. 191 ◽  
Author(s):  
Daniel V. Peláez ◽  
Romina J. Andrioli ◽  
Omar R. Elia ◽  
Eliana E. Bontti ◽  
María A. Tomas
Keyword(s):  
Woody Species ◽  
Fire Frequency ◽  
Perennial Grasses ◽  
Moderate Intensity ◽  
Similar Response ◽  
Managerial Implication ◽  
Central Argentina ◽  
Canopy Area ◽  
Controlled Burns ◽  
The Individual

The aim of the study was to assess the effect of different controlled fire frequencies on cover, density and mortality of the most common woody species in semiarid rangelands of the Caldenal district of central Argentina over a 20-year period. The study comprised three fire treatments: (1) high fire frequency (controlled burns every 3–4 years; HFF); (2) low fire frequency (controlled burns every 8 years; LFF); and (3) unburned control. Repeated burns of moderate intensity, regardless of frequency, reduced the cover and the individual height and canopy area of the most common woody species. Their density was barely affected and the mortality rates were negligible with woody species producing new sprouts after each burn. The woody species under study had a similar response to the high- and low fire frequency treatments. A controlled burn every 3–4 years, permitted the control of woody species cover, height and canopy area, which in turn may favour the production of desirable perennial grasses. The important managerial implication is that the repeated use of controlled fires of moderate intensities in the autumn, given appropriate grazing management, is likely to be essential to maintain these rangelands.

3D reconstruction and calculation of surface area and volume of bell pepper

2007 ◽  
Vol 3 (1) ◽  
pp. 89-113
Author(s):  
Zoltán Gillay ◽  
László Fenyvesi
Keyword(s):  
3D Reconstruction ◽  
Surface Area ◽  
Three Dimensional ◽  
Reference Method ◽  
Bell Pepper ◽  
Three Dimensional Model ◽  
Acceptable Error ◽  
Volume Calculation ◽  
Bell Peppers ◽  
Area And Volume

There was a method developed that generates the three-dimensional model of not axisymmetric produce, based on an arbitrary number of photos. The model can serve as a basis for calculating the surface area and the volume of produce. The efficiency of the reconstruction was tested on bell peppers and artificial shapes. In case of bell peppers 3-dimensional reconstruction was created from 4 images rotated in 45° angle intervals. The surface area and the volume were estimated on the basis of the reconstructed area. Furthermore, a new and simple reference method was devised to give precise results for the surface area of bell pepper. The results show that this 3D reconstruction-based surface area and volume calculation method is suitable to determine the surface area and volume of definite bell peppers with an acceptable error.

Conservation Priorities for Woody Species Used by a Quilombo Community on the Coast of Northeastern Brazil

2019 ◽  
Vol 39 (1) ◽  
pp. 158
Author(s):  
Fernando Vieira Rocha ◽  
Rita Baltazar de Lima ◽  
Denise Dias da Cruz
Keyword(s):  
Woody Species ◽  
Northeastern Brazil ◽  
Conservation Priorities

Diversité floristique spontanée des plantations de café et de cacao dans la forêt classée de Monogaga, Côte d'Ivoire | Spontaneous floristic diversity of cocoa and coffee plantations in the classified forest of Monogaga, Côte d'Ivoire (reviewed paper)

2006 ◽  
Vol 157 (2) ◽  
pp. 31-36 ◽  
Author(s):  
Constant Yves Adou Yao ◽  
Edouard Kouakou N'Guessan
Keyword(s):  
Cote D'ivoire ◽  
Côte D’Ivoire ◽  
Diversity Index ◽  
Agricultural Practices ◽  
Woody Species ◽  
Secondary Forests ◽  
Cote D’Ivoire ◽  
Coffee Plantations ◽  
Côte D'ivoire ◽  
High Tree Density

The inventory and the analysis of the woody species preserved in the different categories of cocoa and coffee plantations showed that they are relatively diversified (presence of endemic, rare and threatened species). They also preserved high tree density and high basal areas. The young plantations are especially diversified. Their number of species,density and basal areas and diversity index are similar to those of the neighbouring old growth and secondary forests. Older plantations display a sharp decline of diversity over time. Agricultural practices in the region represent a threat in the medium term to the preservation of biodiversity.

Effects of human disturbance on understory woody species composition and diversity in fengshui forests

2009 ◽  
Vol 17 (5) ◽  
pp. 458 ◽  
Author(s):  
Lü Hao-rong ◽  
Liu Song-song ◽  
Zhu Jian-yun ◽  
Ye Yong-chang ◽  
Chen Hong-yue ◽  
...  
Keyword(s):  
Species Composition ◽  
Human Disturbance ◽  
Woody Species
Sign in / Sign up

Export Citation Format

Share Document