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. Ecology. ECOLOGY READING. CHAPTER 47 and CHAPTER 48 – Ecology. CHAPTER 6 – to describe the roles of photosynthesis and cellular respiration. ECOLOGY VOCABULARY. Carrying capacity. Cellular respiration. 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. 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. Detritivore. an organism that . feeds off of dead plant or animal matter; breaks down organic material; . Organisms . that produce their . own. . energy. PRODUCERS. CONSUMERS. AUTOTROPHS. Organisms obtain energy from . How do populations interact?. Populations compete amongst themselves & . between . other populations. …amongst themselves. Populations compete amongst themselves & between other populations. . Community Ecology. Community. = group of populations of different species living close enough to interact. Interspecific interactions. Can be positive (+), negative (-) or neutral (0). Includes:. TROPHIC LEVELS. An organisms trophic (feeding) level is determined by the organism’s source of energy. There are 3 main trophic levels in a food web.. Autotrophs. Heterotrophs. Saprotrophs. 1. AUTOTROPHS:. 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. （. hSFC. ）. draft-dolson-sfc-hierarchical-06. David . Dolson. (ddolson@sandvine.com). Shunsuke. Homma (homma.shunsuke. @lab.ntt.co.jp) . Diego R. Lopez (diego.r.lopez@telefonica.com). Mohamed . Mrs. Milam. Adapted from Ms. Davies. 5.1.1 Define . species, habitat, population, community, ecosystem . and . ecology.. Ecology. : . . Environment has 2 components: . . . Left: Image from Wikimedia Commons of one of the earliest known depictions of a food web, by Victor . Summerhayes & Charles Elton (1923) for Bear Island, Norway. Right: Provenance of “A simplified food web for Northwest Atlantic” unknown . Dr.Seema Keswani. Assistant Prof. & Head.. Dept. of Zoology. Trophic Levels. The primary source of energy for an ecosystem is the sun. . Photosynthetic organisms, such as plants and algae, change light energy from the sun into energy that they can use to grow. . Photosynthesis and Sugar. Producers use the. e. nergy from. s. unlight to combine. c. arbon dioxide. a. nd water to make oxygen and a simple sugar called glucose. This process is called . photosynthesis.