Forestry Science - Forestry Natural Resources and Wildlife - Lecture Slides, Slides of Wildlife Ecology

Download Forestry Science - Forestry Natural Resources and Wildlife - Lecture Slides and more Slides Wildlife Ecology in PDF only on Docsity! Forestry Science Docsity.com Introduction • Trees rank only second to grass in their distribution on the earth. • Forest land owners need to be familiar with the trees on their land. Docsity.com Functions of the stem • Also known as the trunk • Transports food, water and minerals up and down the plant • Produces the bulk of the useful wood in a tree Docsity.com Functions of the stem • Heartwood -- the darker-colored wood of the center portion of large trees. This wood is dead. This core serves only to give the tree strength and keep it upright. • Xylem -- located outside the heartwood, this is a lighter- colored wood also know as sapwood. It is the living portion of the tree. It is the means by which raw nutrients and water are carried from the roots to the crown as well as a storage area of food synthesized in the leaves. Docsity.com Functions of the stem • Cambium -- located outside the sapwood and inside the bark. This layer of active cells is responsible for the growth of the tree and forming a new annual ring each year. • Phloem -- located outside the cambium layer. This layer of living cells is also called the inner bark. It carries food made in the leaves down to the branches, trunk and roots. It is protected by the dead, non- functioning outer bark. • Cork cambium -- the thin layer of cells between the phloem and the bark itself which forms the outer bark. Docsity.com