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This chapter explores the energy roles within ecosystems, categorizing organisms into three main groups: producers, consumers, and decomposers. Producers, such as plants and algae, generate their own food through photosynthesis and serve as the primary energy source. Consumers, including herbivores, carnivores, and omnivores, obtain energy by consuming other organisms. Decomposers recycle energy by breaking down biotic waste and return nutrients to the ecosystem. The interactions are illustrated through food chains, food webs, and energy pyramids, highlighting how energy flows and is utilized in various biomes.
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Ecology & Environment Chapter 2
Vocabulary Scavenger Decomposer Food chain Food web Energy pyramid
What are the energy roles in an ecosystem? • Organisms in an ecosystem are either: • Producer • Consumer • Decomposer
Producers • Organisms that makes its own food • Source of all food in an ecosystem • Plants, algae, bacteria photosynthesis
Consumers • Obtains energy by eating other organisms Herbivores = only eat plants Carnivores = only eat animals Omnivores = eat plants and animals Scavenger = feeds on dead organisms
Consumers – Which is which? Label each picture as a herbivore, carnivore, omnivore or scavenger
Decomposers • Break down biotic wastes and dead organisms • They return raw materials back to the ecosystem • They recycle energy! • Mushrooms, bacteria, mold
Pair Share Review • Write one sentence with your pair share partner; finish this sentence: The sun is the main source of energy for producers, consumers and decomposers because ________________________________ _____________________________________________________________________________________________________________________.
How does energy move through an ecosystem? • Energy moves through an ecosystem when one organisms eats another!
Food Chains • Series of events where one organisms eats another. Lake Algae -> Bass Fish -> Eagle • Put an example of a food chain in your notes. Connect grass to you!
Food Webs • Food chain shows one path of energy • Food web shows all the possible paths energy can move *Virtual lab tomorrow!
Energy Pyramids • Diagram that shows how energy moves from lower to higher levels *the most energy is available at the producer level of the pyramid, as energy moves up the pyramid less energy is available
Pair Share Review • With your pair share partner, complete the Energy Flow in Ecosystems worksheet. • 10 minutes! • Will correct when finished!! • No copying! Work together!!
Vocabulary Biome Climate Desert
Vocabulary Rainforest Emergent layer Canopy Understory
Vocabulary Grassland Savanna Deciduous tree
What are the six major biomes? Biome – group of ecosystems with similar climates and organisms • Desert • Rainforest • Grassland • Deciduous forest • Boreal forest • Tundra
Climate Climate = average temp & amount of precipitation *Climate determines a biome by limiting the type of plants that can grow
Prepwork • Pages 63-66 due tomorrow!
