Week 1 and 2
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This 2 page Class Notes was uploaded by Daniella Heussner on Monday January 25, 2016. The Class Notes belongs to BIOL-3034 at Oklahoma State University taught by Dr. Steets in Spring 2016. Since its upload, it has received 18 views. For similar materials see Ecology in Biology at Oklahoma State University.
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Date Created: 01/25/16
Adaptation the evolutionary process by which organisms become better suited to their environments A genetically determined characteristics that enhances the ability of an individual to cope with its environment a populationlevel response that occurs through natural selection Acclimation A reversible change in the morphology or physiology of an organism in response to environmental change An individuallevel response that is purely phenotypic The Spheres Lithosphere rocky part of the planet Hydrosphere watery part of the planet Atmosphere gaseous part of planet Biosphere living part of planet Thermal properties of water Liquid over a broad range of temperature High heat capacity Decreases expands in density below 4 degrees celsius Buoyancy and viscosity of water Water supports and constrains life Water is buoyant and has high viscosity Aquatic organisms evolved adaptations to maintain neutral density streamlined body reduced drag projections retard sinking Water as a solvent Almost all substances dissolve in water Rainwater trace minerals Lakes and rivers 0102 percent dissolved minerals Oceans 34 percent dissolved minerals Acid rain and aquatic life Acid rain in killing brook trout populations Salt and water balance Osmoregulation Process of maintaining a proper salt balance Fresh water fist are hyper osmotic internal salt conc higher that water marine fish are hypoosmotic internal salt conc lower that than of water Problem for freshwater fish how to exclude water and still uptake solutes Kidneys retain solutes in the water Active uptake of solutes from gills Problem for marine fish How to retain water and remove solutes Kidneys excrete most solutes Active secretion in gills Plant salt and water balance Establish high root osmotic concentrations to maintain water movement into root Salt glands on leaves Temperature limits Heat increases movement of molecules which increases biological function For every 10 degrees increase biological activity increases 24 times Thermophile red alga can live in really hot environments and high acidity 24 Climate change and coral reef decline 1 of ocean surface House 25 of aquatic species Coral bleaching kills Cold and biological activity ice crystals form arctic pods developed antifreeze
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