I am looking for an article on the influence of grazing animals (cattle and game) on branch sagging. I suspect that when the buds of the lowest branches are eaten, the hormones in the branch change sufficiently to influence the growth of the lowest branches. It seems that in that case branches do not sag because further sagging of branches will only lead to the complete loss of leaves on those branches. But is this assumption correct? Does anyone have an idea whether this has ever been studied?
Many thanks in advace.
Wim Peeters
search ResearchGate, loads of work on Elephant damage to trees and others e.g. the following:
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Predicting Height to Crown Base for Undamaged and Damaged Trees in Southwest Oregon
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- Apr 2000
- Mark L. Hanus
- 📷David W. Hann
- David D. Marshall
Equations for predicting height to crown base are presented for tree species from southwest Oregon. Equations for undamaged and damaged trees were estimated with weighted nonlinear regression techniques. The effects of specific damaging agents on the height to crown base were explored, and damage correction factors were estimated. The damage correction factors can be used to correct the predicted crown ratio for specific damaging agents and their severity in samples where damage is noted. These equations are being incorporated into the new southwest Oregon version of ORGANON (ORegon Growth ANalysis and projectiON), a model for predicting the growth of individual trees in forest stands. The equations extend the past model to older stands and stands with a heavier component of hardwood tree species.
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