Terrestrial laser scanner is a kind of fast, high‐precision data acquisition device, which had been more and more applied to the research areas of forest inventory. In this study, a kind of automated low‐cost terrestrial laser scanner was designed and implemented based on a two‐dimensional laser radar sensor SICK LMS‐511 and a stepper motor. The new scanner was named as BEE, which can scan the ...

—Total aboveground live tree biomass in Puerto Rican lower montane wet, subtropical wet, subtropical moist and subtropical dry forests was estimated using data from two forest inventories and published regression equations. Multiple potentially-applicable published biomass models existed for some forested life zones, and their estimates tended to diverge with increasing tree diameter at breast ...

The age, size and morphology of trees, including crown dimensions, can influence defoliation. In Croatia, the selection management silver fir (Abies alba Mill.) forests involves pure or mixed stands, either which be affected by various disturbances, resulting in unbalanced stand structures. aim this study was to estimate probability trees transitioning from one defoliation class next, examine t...

We used lightweight terrestrial laser scanning (TLS) to detect over 3000 stems per hectare across a 12-ha permanent forest plot in French Guiana, 81% of them < 10 cm trunk diameter. This method retrieved 85% the trees classic inventory. Finally, TLS revealed that stem positions inventory had geolocation errors up 6 m. Accurate position mapping tropical rainforest is crucial for baseline studies...

Acorns are an important wildlife food resource and seed source for oak regeneration. Most acorn production studies note wide and consistent differences in acorn productivity among individuals, but none clearly demonstrate determinants of productivity. Acorn production by black, northern red, scarlet, chestnut and white oak was measured from 1993 to 1997 in the southern Appalachians was measured...

Clonal forestry has developed rapidly in recent years and already plays a significant role commercial tree plantations worldwide. breeding requires accurate assessments of genetic parameters, together with measurements clonal productivity, stability, adaptably. However, relevant studies for clones Paulownia spp. genotypes are rare. We therefore conducted tests on twenty established at three sit...

The aim of this study was to assess Acacia senegal trees’ characteristics as well evaluate the carbon stock under a variety ages in El Demokeya forest Sudan, where Gum Arabic belt is located. 12 sample plots, 2021 were randomly distributed represent entire area prior required measurements. designed squire plots with one hectare. In each plot, all trees counted, their height (m), and Diameters B...

the oriental beech constitute one third of northern forests area and stocking volume in the north ofiran. these stands obseve in pure and mixed. in order to properly management which guaranteesustained yield, it is crucial to collect basic information including stocking (volume and stem number),tree growth, diameter distribution pattern, diameter-height relationship, diameter-volume relationshi...

Structural changes over time in forests of shade-tolerant species are difficult to study because these stands are often broadly uneven-aged and not suitable for traditional chronosequence analysis. Yet because of past disturbances of variable intensity and frequency, there is often substantial structural variation among stands of a given site quality class. In this study, diameter distributions...

We present two improvements for laser-based forest inventory. The first improvement is based on using last pulse data for tree detection. When trees overlap, the surface model between the trees corresponding to the first pulse stays high, whereas the corresponding model from the last pulse results in a drop in elevation, due to its better penetration between the trees. This drop in elevation ca...