uid=HFR,o=lter,dc=ecoinformatics,dc=org all public read doi:10.6073/pasta/aefd890c600efa3736c0d13d7c365b57 John Weishampel Teresa Riedel 2023 English

As the ecological functioning of a forest stand is often related to the spatial organization of the canopy, we used a portable canopy LiDAR (PCL; Parker et al. 2004) to measure volumetric canopy structure in the simulated HWA management treatments. In September and October 2005, prior to leaf abscission, we set up 16 parallel transects spaced 2 meters apart in the 900 m2 (30 x 30 m) interior of each of the eight treatment plots. The orientation of the transects were either north-south or east-west to minimize the difficulty of traversing the stand. The distances to canopy surfaces more than1 m above the ground along the transects were recorded with the PCL. Assuming a constant horizontal sampling rate, the continual height measures were binned into 1 m intervals. From these measures, vertical canopy profiles, canopy openness, canopy rugosity, and other metrics related to the three-dimensional structure of the canopy can be derived. These canopy measures will be repeated minimally at 5 and 15 year intervals to develop an understanding of early structural dynamics and micrometeorological consequences associated with the simulated HWA treatments. (Parker, G.G., D.J. Harding, and M.L. Berger. 2004. A portable LIDAR system for rapid determination of forest canopy structure. Journal of Applied Ecology 41, 755-767).

canopy cover hemlock hemlock woolly adelgid management remote sensing LTER controlled vocabulary disturbance LTER core area Harvard Forest HFR LTER USA HFR default

This dataset is released to the public under Creative Commons CC0 1.0 (No Rights Reserved). Please keep the dataset creators informed of any plans to use the dataset. Consultation with the original investigators is strongly encouraged. Publications and data products that make use of the dataset should include proper acknowledgement.

Creative Commons Zero v1.0 Universal https://spdx.org/licenses/CC0-1.0.html CC0-1.0 https://harvardforest.fas.harvard.edu/exist/apps/datasets/showData.html?id=hf123 Simes Tract (Harvard Forest). Coordinates based on WGS84 datum. -72.22 -72.21 +42.48 +42.47 200 240 meter 2005 2005 complete Information Manager Harvard Forest

324 North Main Street Petersham MA 01366 USA

(978) 724-3302 hf-im@lists.fas.harvard.edu Harvard Forest

324 North Main Street Petersham MA 01366 USA

(978) 724-3302 (978) 724-3595 https://harvardforest.fas.harvard.edu

The LiDAR data file consists of returns binned to 1m along track intervals for the eight hemlock removal plots. Plot numbers and coordinates correspond to the hemlock removal plot conventions (see HF106). The number of returns for each plot varies as a function of the time it takes to traverse the transects.

Harvard Forest

324 North Main Street Petersham MA 01366 USA

(978) 724-3302 (978) 724-3595 https://harvardforest.fas.harvard.edu https://ror.org/059cpzx98 pointOfContact The Harvard Forest Long-Term Ecological Research (LTER) program examines ecological dynamics in the New England region resulting from natural disturbances, environmental change, and human impacts. National Science Foundation LTER grants: DEB-8811764, DEB-9411975, DEB-0080592, DEB-0620443, DEB-1237491, DEB-1832210. hf123-01-lidar.csv LiDAR measurements hf123-01-lidar.csv 11978772 51d802b33e2b0b4fb5bf819fed36e641 1 \r\n column , https://harvardforest.fas.harvard.edu/data/p12/hf123/hf123-01-lidar.csv plot plot number plot number x location of return in west-east direction meter 1 whole NA missing value y location of return in south-north direction meter 1 whole NA missing value z range from PCL (open sky, i.e. no return, is designated as “NA”) meter 0.001 real NA missing value r amount of pulse return (open sky, i.e. no return, is designated as “NA”) number 1 whole NA missing value 674909 hf123-02-profiles.jpg average vertical profiles of HWA treatment hf123-02-profiles.jpg 305592 30b4f39ec478e380f6365de1e0b4bd12 jpeg https://harvardforest.fas.harvard.edu/data/p12/hf123/hf123-02-profiles.jpg image plot short-term measurement https://harvardforest.fas.harvard.edu/exist/apps/datasets/showData.html?id=hf106