BIOL150 Lecture Notes - Lecture 6: Temperate Forest, River Ecosystem, River Source
31 Oct 2015
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Order 1 streams are permanent but have no tributaries of their own. Later, water slows down, becomes warmer, more nutrient rich, lower in o2. Near source, water is fast, cold, nutrient poor, high in o2. Strahler (1957) in kalff (2002) order 1 order 5 order 7. Understanding of the biological strategies and dynamics of river systems requires consideration of the gradient of physical factors vannote et al. (1980) Links stream size & organic matter inputs with invertebrate feeding and community composition along a watercourse (headwaters to mouth) Developed by vannote et al. (1980); based on the pioneering work of hynes (1975) 1964: established the biology dept. at u. waterloo! A useful, if idealized, picture of (north temperate) streams in forested and undisturbed drainage basins kalff (2002) Note: these are generalities; there are exceptions (i. e. little phytoplankton in turbid higher order streams), but most of the time lotic environments follow these trends.
