Lecture 4 Flashcards
Ecology is
A branch of the biological science that studies the interactions between an organism and its environment
What are the ecology levels of organization?
Organisms Communities Ecosystems Biomes Biosphere
What are the levels of Organization
molecules protoplasm cells tissues organs organisms populations communities ecosystems biomes biosphere Earth solar systems galaxies
What is a biosphere and what does it contain
It is a closed system with one input of energy which comes from the sun,
It contains the Earths atmosphere, lithosphere and hydrosphere
What is a biomes?
The terrestrial part of the biosphere that is divided
How are different biomes distinguished from each other?
By their climate, soils and the species they support
What defines most biomes
Moisture and temperature
In Winnipeg we live near __ of the __ Biomes
3 of the 11
What are Aquatic life zones?
They are like a biome but in the ocean
How are Aquatic life zones defined
by temperature, life an nutrients
What are the richest regions of aquatic life zones ?
The Estuaries
What is an Estuaries?
The places where rivers dumps all its nutrients into an ocean and the continental self is fairly shallow
What comes from Estuaries?
Sea food
What are the two parts to every ecosystem
a) Biotic/Living: all the species/organisms in the ecosystems
b) Abiotic/nonliving: The physical, chemical, range of tolerance
What affects ecosystems?
a) Food systems
b) Predation
c) Competition between species
Habitats are
where a species lives
Niches are
where a species is and what it does
True or false; species can have the same niche
False
What is a generalized niches?
Are organisms that can live anywhere
What are specialized niches?
Organisms that live in a specific are and eat very specific things
Humans can live without __ species of plant, __ species of animals and __ mineral(s)
3, 3, 1
What are two things that move throughout a food chain
Energy and nutrients
Producers can
convert sunlight into other biological forms of energy
Consumers take
energy from one level to the next level by consuming
Primary consumers eat ..
the producers
Secondary consumers eat ..
Primary consumers
Decomposers do what
decompose organisms back into the earth
Omnivores are
consumers that consumer both plants and meat
Herbivores are
consumers of only plants
Carnivores are
consumers of only meat
