Ecology - CISD

Ecology - CISD

TEKS (10) Organisms and environments. The student knows that there is a relationship between organisms and the environment. The student is expected to: 7.10A observe and describe how different environments, including microhabitats in schoolyards and biomes, support different varieties of organisms; 7.10B describe how biodiversity contributes to the

sustainability of an ecosystem; and 7.10C observe, record, and describe the role of ecological succession such as in a microhabitat of a garden with weeds. Biome Large area that has similar weather and organisms

Terrestrial (land): desert, tropical rainforest, grassland Aquatic or Marine (water): freshwater, saltwater Ecosyste m

Consists of all the living and nonliving factors of the environment. Partner Discussion What is a biome and what abiotic

factors characterize each biome? A biome is a large area that has similar weather and organisms. Abiotic factors include elevation, climate, temperature, and Abiotic

nonliving things in an environment Examples: Light, soil, water, temperature, air, and elevation Air Biotic living or once living (dead) things in an environment; plants and animals.

Habitat Where an organism lives, includes everything an organism needs to survive Forest habitat of a wolf Microhabitat small habitat

Flower garden Decaying tree / rotting log bushes Biological Diversity AKA Biodiversity Variety of organisms in an area

More Biodiversity = healthy or stable ecosystem, like Tropical Rainforest or ocean Less Biodiversity = unstable or fragile ecosystem, like Tundra Partner Discussion How might the biodiversity of the populations in a habitat affect organism

interdependency? Biological interactions are the interactions between different organisms in an environment. In the natural world, no organism is cut off from its surroundings. Organisms are a part of their environment which is rich in living and non-living elements that interact with each other in

Sustainability Stable ecosystem that can survive and thrive on its own Variety of plants and animals (biodiversity) Limiting Factor Anything that restricts the number of

individuals in a population to grow. (Food, Space, shelter, water) Running out of space for nesting limits the birds from reproducing. Tundra Tundra

Located near North Pole (Alaska) Extremely cold Little precipitation, but limited drainage Soil is frozen, called Permafrost Low biotic diversity Short season of growth and reproduction Treeless Plants: lichen, moss, grass, small shrubs

Animals: insects and migratory birds in summer, hawks, snow owls, mice, arctic hares, reindeer Taiga (TI guh) Largest Biome South of the Tundra Long cold, snowy winters and Short warm, rainy, humid summers

Plants: Coniferous forest (cone bearing) Animals: Moose, lynx, shrews, bears, foxes Deciduous Forest Eastern U.S., Russia, Japan, New Zealand, Southeastern Australia 4 distinct seasons Deciduous trees (have leaves that change

color that they lose in the Fall) Lots of decomposition on forest floor: insect diversity Plants: Oak, maple, and hickory trees Animals: Bald eagles, coyote, platypus, squirrel, deer Tropical Rain Forest

Near the equator Warm temperatures and lots of precipitation Temperature doesnt vary much night and day Little nutrients in soil because of competition of abundance of plant life Very diverse plants and animals (Coconut trees)

Desert Driest Biome Rain quickly evaporates or drains away Animals: Few large animals, kangaroo rat, scorpions (Most nocturnal and burrowing because extreme temperatures

Few plants: cacti, joshua tree Sandy soil with little organic matter Grasslands Located in mid and western U.S. and Africa Thin soil and a season with little rain

Plants: grasses, small shrubs, few trees Animals: kangaroo, zebra, wildebeest, lion Freshwater The freshwater biome is made up of rivers, streams, creeks, lakes and ponds Plants include algae,water lilies, cattails and moss.

Animals: plankton, alligators, turtles and beavers. Sunlight and Temperature varies according to Salt Water (Marine) Ocean (Light & Dark zones), Plants include coral reef, seaweed, algae, and sea grasses. Animals include starfish, crab, sharks, whales,

fish, and sea otters Water with a high concentration of salt. Amount of sunlight and temperature varies according to location. Intertidal zone Estuary

Transitional zone between freshwater (river) and saltwater (ocean) Native Species A species is specific group of plant or animal that can reproduce similar offspring. Native Species are plants and animals that

naturally lives in a particular area. Invasive Species (nonnative) introduced into an environment by people (alien) Invasive Species Invasive Species These species are introduced into an environment by people AKA nonnative, nonindigenous, alien, exotic

No natural predators, so it often grows/spreads/reproduces quickly When an invasive species takes over, native species die. Examples: Zebra Mussels, Pest, Weeds Ecological Succession

Ecological Succession gradual replacement of populations in an area (how barren land changes into a forest if left alone) Climax Communities

Stable stage of ecological succession Equilibrium Forest Trees Large animals Primary Succession

Begins in a place without any soil. (After a volcanic eruption, or a glacier receding) Pioneer Species (arrive first) living things that do not need soil to survive, they can survive in extreme conditions and start the soil-building process. Examples - Lichens and Moss.

Primary Succession takes up to 1,000 years to reach a climax community Climax Trees &Community Larger Animals

Small Grass & animals Soil Barren Shrubs Building Land Process Secondary Succession

Begins in a place that already has SOIL and was once the home of living organisms Normally occurs after a wildfire, flood, deforestation, or construction. Pioneer species are grasses and small shrubs.

Secondary Succession may take a century (100 years) to reach climax Small animals Barren Land

Grass & Shrubs Trees & Larger Animals Climax

Community Stages of Succession Stability Birth

th Growth a De Maturity

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