- Is how an organism makes a living
- Every relationship that an organisms may have
- Behavior
- where it lives, how it responds to resources available predators,competitors
jueves, 25 de septiembre de 2014
Ecological Niche
What is a system?
SYSTEM
Is an essamble of parts and the relationships between them, which together constitue a whole.System composition :
- storages: matter and energy
- flows: inputs and outputs
- processes: tranfer and transfromation
- feed back mechanisms: positive feedback and negative feedback
Types of systems:
- Open system: Exchanges both energy and matter
- Closed system: Exchanges energy but not matter
- Isolated system: Neither matter or energy crosses
Digestive system is an open system.
A fishbowl is a closed system
miércoles, 24 de septiembre de 2014
What is a Community ?
- Is the interaction of two or more populations of different species living and interacting in the same area.
- Group of populations living and interacting with each other in a common habitat.
- contains all the biotic components of a habitat.
Ecosystem: Comes from the Grek word OIKOS which means home and system.
- A community together with its nonliving surroundings.
- Interaction of biotic and abiotic factors.
Abiotic factors: Nonliving components.
There are two kinds of abiotic factors:
2. Heterotrophs:
- A community together with its nonliving surroundings.
- Interaction of biotic and abiotic factors.
Abiotic factors: Nonliving components.
There are two kinds of abiotic factors:
- Physical: sunlight and shade, amount of precipitation, altitude and latitude, nature of soil and wind.
- Chemical: salinity of water, level of dissolved O2 and other gases, level of plant nutrients, pH of solid and water and level of natural and artifitial toxic substances.
Biotic factors: Living components in an ecosystem.
- Autotrophs: photoautotrophic and chemoautotrophic.
Photoautotrophs: has clorophyll and carry on photosyntesis.
Chemoatotrophs: bacteria that obtain energy from the oxidation of inorganic compounds.
2. Heterotrophs:
- Need a source of pre formed nutrients
- consume tissues of the other organisms
- consumers are classified according to the type of food they eat
Biosphere
What is Biosphere?
is that part of the Earth inhabilited by living organisms; includes both the living and nonliving components.
is that part of the Earth inhabilited by living organisms; includes both the living and nonliving components.
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