Unit 1 Biosphere
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Biotic
Living things
Abiotic
Non-living
Biomass
Organic material from plants or animals used as a renewable energy source for heat, electricity, or bio fuels
Food chain
shows how energy and nutrients move through an ecosystem as one organism eats another
Trophic levels
The levels of a food web//chain: producers, primary consumers, secondary consumers, tertiary, quaternary, decomposers
Autotroph
Living things that can make their own food/energy (plants)
Heterotroph
Living things that get energy from consumption and eating other plants
The two most important factors in determining an ecosystem climate are…
Temperature and precipitation
Trees of wet, tropical, rainforest tend to be… (relating to the leaves)
Broadleaf plants under near constant temperature conditions
A tropical grassland with moon seasons in stunted trees would be called a…
Savanna
When a population grows past the carrying capacity, what happens to the population?
The population starts to die off then returns to carrying capacity
A mature ____ has the greatest species diversity of all terrestrial biomes, and would have the ____ biodiversity index
Tropical rainforest, highest
Why are food chains usually short?
Most of the energy in a trophic level is lost as it passes to the next higher level
What is the soil like in a tropical rainforest and why?
It doesn’t have nutrient rich soils because there are so many plants using it
And a typical food web a decomposer would most likely feed at ____ level(s) and be classified as a _____.
Many levels, heterotroph
The species richness of a community refers to the…
Number of different species
A plant with broad flat leaves is best adapted for…
Absorbing light and rainforest
What is a keystone species?
A species that play a pivotal role in shaping their ecosystem for other species
What is succession?
One community type places, another overtime
What is a taiga/coniferous, forest
Cold, cone shaped trees, high precipitation
What is a tundra?
A cold desert with low precipitation
What is a Savanna
A tropical hot area with medium precipitation
What is a deciduous forest?
An area with high precipitation in medium temperature
What is a species index?
A way to calculate the biodiversity of an area  Richness / abundance