We will use forest inventory data from a long-term ecological research site in western Oregon (WEF). These data consist of a census of all trees in a 10 ha stand. Diameter at breast height (DBH) and tree height (HT) have been measured for all trees in the stand. For a subset of these trees, the distance from the center of the stem to the edge of the crown was measured at each of the cardinal di...

The accurate measurement of diameter at breast height (DBH) is one the essential tasks for biomass estimation an individual tree scale. This paper aims to explore potential unmanned aerial vehicle (UAV) based light detection and ranging (LiDAR) trunk point extraction direct DBH measurement. First, cloud each extracted on UAV LiDAR data by multiscale cylindrical method. Then, directly measured f...

We present the point cloud slicing (PCS) algorithm, to post process point cloud data (PCD) from terrestrial laser scanning (TLS). We then test this tool for forest inventory application in urban heterogeneous forests. The methodology was based on a voxel data structure derived from TLS PCD. We retrieved biophysical tree parameters including diameter at breast height (DBH), tree height, basal ar...

Any defects in street trees may cause injuries to human, vehicles and buildings. This research was investigated in the Babol city, Mazandaran province, in the northern state of Iran.Used the perfect inventory methods and measured the diameter at breathe height (DBH), height and hazardous criteria (dead woods, cracks or seams, decay, wound or cankers, root problems, weak branch unions and skew f...

Any defects in street trees may cause injuries to human, vehicles and buildings. This research was investigated in the Babol city, Mazandaran province, in the northern state of Iran.Used the perfect inventory methods and measured the diameter at breathe height (DBH), height and hazardous criteria (dead woods, cracks or seams, decay, wound or cankers, root problems, weak branch unions and skew f...

Caucasian alder is a large tree and one of the commercial species in the Caspian forests. We investigated the wound healing rate (WHR) and compared the diameter growth (DG) of 66 wounded and 66 unwounded alder trees 15 years after selected logging in these forests. The conditions of the wounds after 15 years were as follows: 56.1% had closed, 25.7% were open, and 18.2% had decayed. The mean WHR...

In October 2011, a snowstorm in the northeastern USA caused many branch failures of many tree species commonly planted in urbanized settings. Immediately following the storm, we assessed 1,764 trees for possible snow-induced damage and factors affecting it on the campus of the University of Massachusetts in Amherst, MA, USA. Nearly all failures were of branches, most of which were not defective...

for maintaining of zagros forests role in wild life, water and soil conservation, the suitable solutions and methods for assessing the existing conditions and planning for management of this forests should be given. to detection of suitable sampling method to study tree diameter at breath height in the northern zagros forest, blake forest, in baneeh region, kurdistan province, and west of iran ...

This study evaluated balsa wood (Ochroma pyramidale) plantations in the search for matrices genetic improvement. We were a total of 20 trees Mato Grosso diversity with ISSR (Inter Simple Sequence Repeats) primers, as well their diameter at breast height (DBH) and commercial (CH). The primers amplified 111 loci (97.3% polymorphic), Nei (0.32) Shannon index (0.48) indicate that there is plantatio...

To investigate the effect of surrounding tree density and topography site host on abundance, species richness, diversity epiphytic orchids, 32 trees Schima wallichii were chosen randomly orchids counted identified. Within a circle radius 20m from each tree, with diameter at breast height (DBH) greater than 20 cm had their name DBH recorded. In addition, angle direction slope which stood measure...