BIOL 215 Lecture Notes - Lecture 18: Dynamical System, Lupinus, Secondary Succession
25 Jan 2018
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Document Summary
Shores that are more/less exposed to the waves. Severity: climate change: increasing frequency and intensity of forest fires (ex. Insect outbreaks: boreal forest - controlled by fire but also insect outbreak. Sandwort: first colonizers: gulls, magnets of colonization. India sand dunes: primary succession (inorganic substrate - sand, going from early grass stage to trees, documentation: p. s. takes part over very long time periods (w/ dunes - 400 years) Starts with an organic substrate: what happens after a beaver pond is opened. Filled as a bog: will (in 200 years) return to forest. Succession can lead to dominance - but can also lead to facilitation i. e. lupinus (from st. helen: alder trees fix nitrogen in soils, greatly improve the physical environment- when other species come along, will. Facilitate other species to come in. disappear from the system. Succesion: a kind of replacement that you can predict.
