Trees and Forests: Affect and Effect on Science 6

Trees and Forests: Affect and Effect on Science 6
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This article explores how trees can affect a forest and its inhabitants. Trees are vital to maintaining the ecosystem balance of a forest by reducing wind movement and preventing drying.

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PowerPoint presentation about 'Trees and Forests: Affect and Effect on Science 6'. This presentation describes the topic on This article explores how trees can affect a forest and its inhabitants. Trees are vital to maintaining the ecosystem balance of a forest by reducing wind movement and preventing drying.. The key topics included in this slideshow are . Download this presentation absolutely free.

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Slide1Trees and ForestsAffect/Effect Science 6

Slide2How Do Trees Affect aForest?  They break the wind and with less air movement, there is less drying.  They shade the ground from the sun thereby lowering air temperature; forests tend to be cool, humid places and the soil is moist there.  Forest soil is also very rich in nutrient because of all the leaves, branches, and stems which decompose into humus.

Slide3How Do Other Living OrganismsAffect the Trees in a Forest?  Herbivores such as deer and caterpillars eat leaves; large populations of tent caterpillars can have a devastating effect on popular trees in Alberta, wiping out all the leaves in stands of such trees in a short time; these trees grow secondary leaves which are fewer in number and smaller in size; the trees will not survive to successive summers of tent caterpillars.

Slide4How Do Other Living OrganismsAffect the Trees in a Forest?  Coniferous trees are also affected by certain insects; the spruce bud worm kills the growing shoots on spruce trees.  Birds can hurt trees; yellow-bellied sapsuckers peck rows of shallow holes around the trunk of trees to draw out the sap; often the birds will make a series of holes in one tree and drain enough sap to kill sections of the tree.  Blight, which is a kind of fungus, can get on leaves and into the wood of tree stems, gradually destroying leaves or wood and eventually killing the tree.