Spherically averaged silhouette area of a tree was computed with Gauss-Legendre integration as

where Streeij) is the silhouette area in direction Ωij, and i and j are the azimuth and zenith angles, respectively. For explanation of the other symbols, see Eq. (4). The STAR with foliage only was calculated as

where S¯tree is the spherically averaged silhouette area of the tree including both foliage and woody parts, and TAfoliage is the total area of foliage in the tree. We also calculated the total area of woody parts for each tree, utilizing the spherically averaged silhouette area without foliage (S¯tree,wood) and assuming that the total woody area (TAwood) equals four times the spherically averaged silhouette area, which is true for any convex body. It was assumed that there is no self-shadowing, because the branches in the trees were sparse. Finally, STAR with woody parts included (STARall) was obtained by applying Eq. (8) but now including both woody parts and foliage in total area (i.e., replacing TAfoliage with TAall= TAfoliage+TAwood).

Note: The content above has been extracted from a research article, so it may not display correctly.



Q&A
Please log in to submit your questions online.
Your question will be posted on the Bio-101 website. We will send your questions to the authors of this protocol and Bio-protocol community members who are experienced with this method. you will be informed using the email address associated with your Bio-protocol account.



We use cookies on this site to enhance your user experience. By using our website, you are agreeing to allow the storage of cookies on your computer.