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Food Webs are teh greatest

Done entirely by evan. Everyone else sucks

Aaron Glasheen

on 15 April 2013

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Transcript of Food Webs are teh greatest

Trophic Levels Gross and Net Primary Production The trophic level of an organism is the position it occupies in a food chain Predation Food Webs By Evan Keep, Aaron Glasheen, Kevin Du, and Nathan Swanson The number of steps an organism is from the start of the chain is a measure of its trophic level Level 1: Primary Producers Level 2: Herbivores Level 3: Predators Level 4: Carnivores Level 5: Apex Predators The Alphas Predators with no predators of their own Don't have to be hypercarnivores Produce biomass from inorganic compounds Autotrophs Usually Photosynthesize, although there are some deep-sea chemosynthetic prokaryotes that make energy from hydrothermal vents Does not include fungi and other decomposers Also known as primary consumers Level is based on source of nutrition Depend on level 1 autotrophs Carnivores eating herbivores Secondary consumers Carnivores eating carnivores Tertiary consumers Lion, shark Includes all plants Includes horses, cattle, stegosaurus, etc. Includes tiger, hyena, etc. Includes detritivores, such as worms and fungi, which consume organic material such as feces, fallen leaves, and wood Primary Productivity Primary Production
The amount of light energy converted to chemical energy in a given time period by an ecosystem What is Predation? Herbivore - Plant Parasite - Host Predator - Prey Importance Effects What it is Types Importance Effects Types Predator - Prey Interactions Herbivore - Plant Interaction Parasite - Host Interaction Food Chain Overview One possible path that energy and nutrient may take as they move through the ecosystem Food Chain Overview Every organism needs to obtain energy in order to live The sequence to who eats whom in an ecosystem are:
-Quaternary Consumer
-Tertiary Consumer
-Secondary Consumer
-Primary Consumer
-Primary Producer "Arms Race" Food Web Overview Food web consists of all the food chain in a single ecosystem Effects on predators Food Web Overview Predation Theory Cycle Canadian Lynx Immigration Energy is lost each time one organism eats another, so there have to be more plants than plant-eaters, more plant-eaters than meat-eaters Stabilization Food Web Overview Predator - Prey Interactions Herbivore - Plant Interactions Parasite - Host Interactions There's interdependence between organisms.

If one species goes extinct, it affects an entire chain of other species Evolution Example Types of parasites Examples Mind Blowing parasites Gross Primary Production- the total amount of light energy that is converted to chemical energy by photosynthesis per unit time

Net Primary Production- equal to to gross primary production minus the energy used for respiration by primary producers
NPP = GPP - R Primary Production Under Water (Marine and Freshwater Ecosystems) There are two main limiting factors for primary production in aquatic ecosystems, light and nutrients. Light Limitation Light is needed for photosynthesis and so is very important for primary production. In an aquatic ecosystem, light has to go through the water before it can get to the plants. Nutrient Limitation Nutrients are the main limiting factor of primary production in aquatic ecosystems. A limiting nutrient is an element that must be added in order to increase production. ROCKS! Alive Lithops History Location Classification Location History Classification TY Eutrophication When there are large amounts of nutrients added to lakes which promote a large growth of cyanobacteria, or algae, this eventually leads to the death of almost all of the fish species. Definition In Practice Symbiosis Mutualism Parasitoidism
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