PPT-FOOD CHAINS TROPHIC

LEVELS ECOLOGICAL PYRAMIDS The is the for food chains is a sequence of feeding relationships describing source. carnivores. A carnivore is an animal that gets food from . killing . carnivores have to hunt down and kill other animals they require a large amount of calories. This means that they have to eat many other animals over the course of the year. The bigger the carnivore, the more it has to eat. You should make sure that you have many more herbivores and omnivores than . 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 .. Chapter 13, Section 13.4. This is called an energy pyramid. It shows how energy is lost moving from the producers to each subsequent, higher, trophic level.. Objectives. To describe the structure of a food chain.. 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. How do populations interact?. Populations compete amongst themselves & . between . other populations. …amongst themselves. Populations compete amongst themselves & between other populations. 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. 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:. Mrs. Joelle R. King. Science Teacher. Food Chains. Food chains. use pictures or words and arrows to show the movement of energy through the trophic levels of organisms.. The . trophic level. of an organism indicates the position that the organism occupies in the food chain.. Objectives. Define and give examples of organisms at different trophic . levels. Describe how energy flows in a food chain. .. Explain why producers must outnumber consumers in a balanced ecosystem.. Value Chains. 1. Mainstream . food supply chains have these characteristics:. 2. Each company in the chain seeks to buy as cheaply and sell as expensively as . possible.. This leads to: . business relationships that are competitive and adversarial (win-lose). Ecosystem. A community and its abiotic environment. The sun is the main source of energy for most ecosystems. All life that you see on Earth’s surface relies either directly or indirectly on sunlight. 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. .