Climate Change
For the second installment, I propose climate change as a threat to forest ecosystems and communities. Species composition and distribution is likely to change as a result of higher temperatures and changing precipitation. Conifer growth is likely to be reduced by about 20%. Conditions may change to favor exotic pests or pathogens that further exacerbate trees vulnerability.
Elevated carbon dioxide in the atmosphere could also have significant effects on Sierra forests. Some studies suggest increased tree productivity with CO2 enrichment, while in other studies, the findings are less conclusive. Even more uncertain are the secondary ecosystem effects of elevated CO2. Does altered atmospheric chemistry alter the nutritive value of plants? How do herbivores respond to trees grown under elevated CO2 conditions, and what are the effects for the entire food chain? How will this ultimately affect ecosystem function?
In order to retain functional forests in the Sierra Nevada, forest management must understand and adapt to these changing conditions, and the rate of change coupled with uncertainty pose real challenges to the future of forests and a sustainable forestry industry in the Sierra.
global Warming and clearcutting
clearcutting and climate change
Thanks - well written - keep up the good work .. Also if you have other chances encourage folks to do letters to the editors - Governor is not genuine about climate change if he doesn't do something asap about the clearcutting..
too big to think about
Yikes
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