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4 results for “individual tree crown”
Point clouds from terrestrial laser scanning from crowns of individual Scots pine trees
<p>Trees adapt to their growing conditions by regulating the sizes of their parts and their relationships. For example, removal or death of adjacent trees increases the growing space and the amount of light received by the remaining trees enabling their crowns to expand. Knowledge about the effects of silvicultural practices on crown size and shape as well as about the quality of branches affecting the shape of a crown is, however, still limited. Laser scanning (or Light detecting and ranging LiDAR) has provided new opportunities for characterizing trees in more detail in three-dimensional space. Especially terrestrial laser scanning (TLS) has increasingly been used in producing a variety of tree attributes. This data set includes 3D reconstruction of crowns of Scots pine (<em>Pinus sylvestris</em> L.) trees from sample plots with different thinning treatments. The thinning treatments include two intensities of thinning, three thinning types as well as control (i.e. no thinning treatment since the establishment). This data set can be used in developing point cloud processing algorithms for single tree crown characterization and for investigating variation in crown size and shape as well as the effects of various thinning treatments on crown size and shape of Scots pine trees grown in boreal forests.</p>
Supporting Data: Monitoring spring phenology of individual tree crowns using drone-acquired NDVI data
<p>This data supports the RSEC publication: "Monitoring spring phenology of individual tree crowns using drone-acquired NDVI data"</p> <p>GeoTIFF:</p> <p>NDVI and green band orthomosaics from data acquired using a Parrot Sequoia camera mounted on a 3DR Solo quadcopter drone. Filename indicates data capture date (YYYY-MM-DD).</p> <p>Shapefiles:</p> <p>Shapefiles with tree ROIs and corresponding species class, described in ReadMe file.</p>
Data from: Neighbour species richness and local structural variability modulate aboveground allocation patterns and crown morphology of individual trees
<p>Local neighbourhood interactions are considered a main driver for biodiversity–productivity relationships in forests. Yet, the structural responses of individual trees in species mixtures and their relation to crown complementarity remain poorly understood. Using a large‐scale forest experiment, we studied the impact of local tree species richness and structural variability on above‐ground wood volume allocation patterns and crown morphology. We applied terrestrial laser scanning to capture the three‐dimensional structure of trees and their temporal dynamics. We found that crown complementarity and crown plasticity increased with species richness. Trees growing in species‐rich neighbourhoods showed enhanced aboveground wood volume both in trunks and branches. Over time, neighbourhood diversity induced shifts in wood volume allocation in favour of branches, in particular for morphologically flexible species. Our results demonstrate that diversity‐mediated shifts in allocation pattern and crown morphology are a fundamental mechanism for crown complementarity and may be an important driver of overyielding.</p> <p> </p>
Data from: Neighbour species richness and local structural variability modulate aboveground allocation patterns and crown morphology of individual trees
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