PPT-Dynamic behavior of upper trophic level populations:

age structured models with densitydependent recruitment Louis W Botsford Wildlife Fish and Conservation Biology   Fished populations have greater variability eg Hsieh et al 2006. Elisa, Chelsea, Ellie. Trophic Cascades. Herbivores can limit plant populations, but…. In most places, plants are abundant and herbivores don’t limit plant growth. So…why is the world green?. HSS hypothesis. trophic. levels. Energy and Ecosystems . Learning Objectives. All students should be able to calculate:. The percentage of energy transferred from one . trophic. level to the next.. Percentage efficiency of energy transfers .. Tropopause. . Atmos. 5110/6110. Synoptic–Dynamic Meteorology I. Jim Steenburgh. University of Utah. Jim.Steenburgh@utah.edu. Supplemental Reading: . Lackmann. (2011) Chapter 4. What is PV Thinking?. Energy Transfer. Energy transfers from one organism to another when they are consumed and metabolized.. Energy can be followed based on how organism obtain energy.. Trophic levels . – the position of an organism in a sequence of energy transfer. Relate the structure of each of the major plant organs and tissues to physiological processes.. Explain how the structures of plant tissues and organs are directly related to their roles in physiological processes.. Unit 5 - Ecology. Introduction. Relationships exist in order for one or both organisms to get food (energy).. Sunlight is the main source of energy on Earth.. Section 1. Food Chains/Food Webs. Feeding Style. . Community Ecology. Community. = group of populations of different species living close enough to interact. Interspecific interactions. Can be positive (+), negative (-) or neutral (0). Includes:. Beyond two trophic levels. HSS 1960. Oksanen. et al. 1981. Control, Limitation, Regulation. Bottom-up vs. Top-down. Trophic cascades. Beyond two trophic levels…. Why is the world green?. Observation: Plants are abundant; thus…. Autotroph:. Heterotroph:. Food Chain:. Food Web:. Trophic Level:. Energy is transferred in ecosystems. Producers give E to . Consumers. Food chains show flow of energy (arrows  show where energy is going). Food Web. Energy . Paramid. Period 6. Fowlers, Jonah. Hendricks, Justina. Dennis, . Tamesha. Abreu, Anabel. McNeal, . Kahil. Tovias. , Stephanie. Bates, Tyree. Rochay. , Cody. Jeske. , Kaeden. Brown, Erica. Relative importance of . allochthonous. versus autochthonous sources of. nutrients. sediments. o. rganic matter (dissolved and particulate). Productivity within a Watershed. Wetland very productive. In no particular order:. Steve Nelson, BYU Dept. of Geological Sciences. Sam . Rushforth. , . Rushforth. Phycology. The question:. What was the trophic state of Utah Lake prior to European settlement and how has it changed as development proceeded?. using various models including . food chains. , food webs, and ecological pyramids. Lesson frame. :. We will analyze the flow of energy and matter through a food chain.. I will complete the Looney Labels Food Chain activity. LEVELS. ECOLOGICAL. PYRAMIDS. The . ____. is the . ______________. for food chains.. . is a sequence of feeding relationships describing . ______. ___________________. .. source.