scholarly journals The potential to characterize ecological data with terrestrial laser scanning in Harvard Forest, MA

2018 ◽  
Vol 8 (2) ◽  
pp. 20170044 ◽  
Author(s):  
D. A. Orwig ◽  
P. Boucher ◽  
I. Paynter ◽  
E. Saenz ◽  
Z. Li ◽  
...  
Keyword(s):  
Laser Scanning ◽  
Forest Canopy ◽  
Census Data ◽  
Forest Ecology ◽  
Terrestrial Laser Scanning ◽  
Adelges Tsugae ◽  
Ecological Data ◽  
Harvard Forest ◽  
The Impact

Contemporary terrestrial laser scanning (TLS) is being used widely in forest ecology applications to examine ecosystem properties at increasing spatial and temporal scales. Harvard Forest (HF) in Petersham, MA, USA, is a long-term ecological research (LTER) site, a National Ecological Observatory Network (NEON) location and contains a 35 ha plot which is part of Smithsonian Institution's Forest Global Earth Observatory (ForestGEO). The combination of long-term field plots, eddy flux towers and the detailed past historical records has made HF very appealing for a variety of remote sensing studies. Terrestrial laser scanners, including three pioneering research instruments: the Echidna Validation Instrument, the Dual-Wavelength Echidna Lidar and the Compact Biomass Lidar, have already been used both independently and in conjunction with airborne laser scanning data and forest census data to characterize forest dynamics. TLS approaches include three-dimensional reconstructions of a plot over time, establishing the impact of ice storm damage on forest canopy structure, and characterizing eastern hemlock ( Tsuga canadensis ) canopy health affected by an invasive insect, the hemlock woolly adelgid ( Adelges tsugae ). Efforts such as those deployed at HF are demonstrating the power of TLS as a tool for monitoring ecological dynamics, identifying emerging forest health issues, measuring forest biomass and capturing ecological data relevant to other disciplines. This paper highlights various aspects of the ForestGEO plot that are important to current TLS work, the potential for exchange between forest ecology and TLS, and emphasizes the strength of combining TLS data with long-term ecological field data to create emerging opportunities for scientific study.

scholarly journals Terrestrial laser scanning in forest ecology: Expanding the horizon

2020 ◽  
Vol 251 ◽  
pp. 112102 ◽  
Author(s):  
Kim Calders ◽  
Jennifer Adams ◽  
John Armston ◽  
Harm Bartholomeus ◽  
Sebastien Bauwens ◽  
...  
Keyword(s):  
Laser Scanning ◽  
Forest Ecology ◽  
Terrestrial Laser Scanning

scholarly journals Using terrestrial laser scanning in inventorying of a hybrid constructed wetland system

2017 ◽  
Vol 76 (10) ◽  
pp. 2664-2671
Author(s):  
Radomir Obroślak ◽  
Andrzej Mazur ◽  
Krzysztof Jóźwiakowski ◽  
Oleksandr Dorozhynskyy ◽  
Antoni Grzywna ◽  
...  
Keyword(s):  
Constructed Wetland ◽  
Hot Spots ◽  
National Park ◽  
Laser Scanning ◽  
Treatment Plant ◽  
Terrestrial Laser Scanning ◽  
Technical Documentation ◽  
Education Centre ◽  
Quantitative Changes

Abstract The goal of this paper was to evaluate the possibility of using terrestrial laser scanning (TLS) for inventorying of a hybrid constructed wetland (CW) wastewater treatment plant. The object under study was a turtle-shaped system built in 2015 in Eastern Poland. Its main purpose is the treatment of wastewater from the Museum and Education Centre of Polesie National Park. The study showed that the CW system had been built in compliance with the technical documentation, as differences between values obtained from the object and those given in the design project (max. ± 20 cm for situation and ±5 cm for elevation) were within the range defined by the legislator. It was also shown that the results were sufficiently precise to be used for as-built surveying of the aboveground elements of the CW system. The TLS technique can also be employed to analyse quantitative changes in object geometry arising during long-term use (e.g. landmass slides or erosion), the identification of which can help in selecting the hot-spots at risk of damage and thus restore the object to its original state as well as prevent new changes.

Retrieving forest canopy clumping index using terrestrial laser scanning data

2018 ◽  
Vol 210 ◽  
pp. 452-472 ◽  
Author(s):  
Lixia Ma ◽  
Guang Zheng ◽  
Xiaofei Wang ◽  
Shiming Li ◽  
Yi Lin ◽  
...  
Keyword(s):  
Laser Scanning ◽  
Forest Canopy ◽  
Terrestrial Laser Scanning ◽  
Clumping Index

scholarly journals The use of laser scanning technology of accounting for wood

2015 ◽  
Vol 5 (4) ◽  
pp. 114-122
Author(s):  
Стариков ◽  
Aleksandr Starikov ◽  
Батурин ◽  
Kirill Baturin
Keyword(s):  
Laser Scanning ◽  
Forest Canopy ◽  
Forest Cover ◽  
Three Dimensional ◽  
Terrestrial Laser Scanning ◽  
Monitoring And Evaluation ◽  
Digital Processing ◽  
Forest Plantations ◽  
Three Dimensional Model ◽  
Individual Trees

Now for the decision of tasks of monitoring and evaluation of forest plantations the use of methods and means of laser scanning is one of the most act-sexual and priorities. Laser scanning can be performed independently, or in combination with digital aerial and space photos and video, and can also be carried out ground research on the sample areas. A number of indicators laser scanning is superior to other, currently known, remote evaluation methods qualitative and quantitative characteristics of the forest Fund Laser scanning of forest cover based on the use of modern tech-nologies of digital photogrammetry and geoinformation systems, as well as methods of digital processing and multidimensional modeling of the reflected signals. The article provides analysis of modern methods and means of aerial and terrestrial laser scanning of forest stands. The use of air-borne laser scanning will allow achieving high precision in the determination of basic inventory pa-rameters that are comparable to land-based taxation. Main advantages of laser ranging to other me-thods of monitoring of forest plantations is that the laser beam is able to penetrate the forest canopy, thereby scanning all the tiers of the stand. High density scanning (5-10 points per 1 m2) allows ob-taining three-dimensional images of individual trees with high accuracy. The obtained three-dimensional model requires no processing, unlike aerospace methods of remote sensing that are as-sociated with long and arduous races-encryption of the images. Terrestrial laser scanning, in fact, similar to traditional photogrammetric methods, but it allows you to get the coordinates from one point of standing with the possibility of control measurements directly in the field, while providing higher measurement accuracy, compared with photogrammetric methods.

scholarly journals Generating a three-dimensional measuring scene for the forest sector as based on modern geodetic technologies

2021 ◽  
Vol 875 (1) ◽  
pp. 012083
Author(s):  
N Begliarov ◽  
E Mitrofanov ◽  
V Kiseleva
Keyword(s):  
Spatial Data ◽  
Laser Scanning ◽  
Forest Canopy ◽  
Method Development ◽  
Three Dimensional ◽  
Terrestrial Laser Scanning ◽  
Accurate Information ◽  
Forest Sector ◽  
Individual Tree ◽  
Cloud Of Points

Abstract Modern geodetic technologies of gathering three-dimensional spatial data incorporate terrestrial laser scanning and aerial photo survey from unmanned aerial vehicles. The combination of these technologies and joint result of survey provide the data of 3D point model and accurate information on trunks and crowns of individual trees. The paper examines the experiment with the application of method of formation of 3D measuring scene in the form of dense cloud of points combining the results of terrestrial laser scanning and materials of photogrammetric processing of UAV-provided data. The method eliminates basic shortcomings of each technology, enhances their advantages, and opens the way to the compilation of more representative 3D measuring scenes. A specific advantage of the method is the outcropping of detailed information on the form, size and condition of individual tree crowns. This option finds a practical application in landscape evaluation and design, remote measuring of trunk parameters excluding the felling of model trees for the compilation of regional timber account tables. The closest perspectives of method development are related to increasing the accuracy of combined survey by specifying flight missions and working with the light regime under forest canopy.

THE IMPACT OF AERIAL FENITROTHION SPRAYING UPON THE POPULATION BIOLOGY OF BUMBLE BEES (BOMBUS LATR.: HYM.) IN SOUTH-WESTERN NEW BRUNSWICK

1978 ◽  
Vol 110 (11) ◽  
pp. 1145-1156 ◽  
Author(s):  
R. C. Plowright ◽  
B. A. Pendrel ◽  
I. A. McLaren
Keyword(s):  
Population Biology ◽  
Forest Canopy ◽  
Red Clover ◽  
Late Summer ◽  
Control Area ◽  
Bumble Bees ◽  
Long Term Effects ◽  
Dense Forest ◽  
The Impact

AbstractAerially sprayed fenitrothion (0.21 kg/ha) caused mortalities from 100% among experimentally caged bees in exposed habitats to 47% in cages placed under dense forest canopy. Bumble bees found foraging in sprayed areas during the days immediately following the spray suffered significantly higher subsequent mortality than those in unsprayed areas.Long-term effects were investigated by comparing late summer Bombus population densities among sites representing various spray histories. For all species combined, abundances in unsprayed areas averaged 3 times higher than in fenitrothion treated areas. Population recovery appeared to be complete within a few years after discontinuation of spraying.Foraging performance by laboratory reared colonies was significantly higher in sprayed areas with reduced bee populations than in a control area, possibly because of relaxation of competitive stress. The diversity of plant species used for pollen collection was nearly twice as great in the control as compared with sprayed areas, suggesting that the effect of fenitrothion spraying on cross-pollination may be greatest for plants which are subdominant in the hierarchy of bee preference In one such plant, red clover, reduced seed-set was demonstrated.

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