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Before the bell… Take out your notes sheet from yesterday Look at the following pictures and think about things that must be considered Pre Harvesting of Trees and Post Harvesting of Trees. Ecologically Sensitive Areas… Areas that are ecologically sensitive and could not recover from harvesting (unsustainable) should not be logged. The Decision When forest managers (foresters) and loggers examine a potential area for logging, these 6 qualities of the forest are analyzed. Why would you not log this tree? #1-Type and age of the tree Type and age of the tree (is the sustainability of the species threatened?) are considered. Rare species usually are not cut…and trees that are too young/old may not be cut What is wrong with these situations? This is Bad!!! #2- Slope of Land Slope of land (will the removal of trees cause the soil to erode and pollute waterways?) Why would you not log here? #3- Soil Type Type of soil (will the soil have enough nutrients to support re-growth?) This is not possible in rain forests. Why would you not log here? #4- Climate Are there appropriate amounts of rain and a temperatures ranges for the forest to re-grow? Is there a change in the amount of light? #5- Wildlife Wildlife - Are there any endangered or threatened species? Is the wildlife sustainable? What’s wrong here? #6- Surroundings Surroundings (Location) (will it affect nearby ecosystems such as streams and ponds? Does it fragment a larger ecosystem? What can we do after logging to help the ecosystem grow back? #1 & 2 Mechanical Preparation – clear away the logging debris (duff and slash) with equipment Slash burning – Removes debris by burning. This is low in cost and good for steep slopes. Why is it hard for trees to grow back here? #3&4 Herbicides – Controls weeds with chemicals so trees don’t compete for resource. May harm wildlife and remove cover. Planting – Replant with genetically improved seedlings. (most Pa forests will re-seed themselves) #5,6,7 Thinning – remove overcrowded and poorly growing trees Fertilize – Adds nutrients to the soil (usually not necessary) Protection – Protect from fire, disease, and insect pests. This is continuous.