Intro to Ecology Notes

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Chapters in ecology
Rate A 04/03/09

Ecology - Science that deals with the interaction between organisms and the environment in which they live .

3 Different approaches to ecology :

A.        Descriptive approach - Making field observations and conclusions, and then testing hypotheses elsewhere . She lays the foundation for functional ecology asks vital " How the system works ? "

Two.        Theoretical approach - Examining ecological questions and does not rely necessarily on observational data or attempts . First build a model and only brother " As testing ground .

Three.        Experimental approach - Examining ecological questions or observations from experiments conducted in the field or laboratory - By " S by the investigator's intervention " J. manipulation .

Very difficult to make qualitative predictions in ecology - There are many unpredictable variables .

(        Ecosystem - The basic unit of ecology , Complete functional unit functioning on its own even if it is affected by interacting with the environment ( Ecosystem) .

(        Ecosystem components includes a - Cruises ( Wind , Water , Temperature ',Humidity ) And components cruises ( Ltd. " H and organisms ).

(        Habitat - ( Hbitot / The animals / Biotope ) A place characterized by a combination Particular Environmental factors ( Conditions and resources )Ecosystem consists of a mosaic of habitats . Many kinds of habitats =Heterogeneous system .

Rate 2 - Complete .

Rate 3 18/03/09

Super predators - The chain / Food pyramid :

Evaluation of secondary production efficiency - Elephants, for example , Largest land mammal . Consume about 10% Food from the area where the elephant energy produces live . Manure , Energy utilization and leaving only basic Mtabolizim 7.1 K. " C increase in offspring .

The conclusion - Let him devour the elephant who will only 10% What he ate it 1%Living space made .

Secondary production efficiency of the Elephants 10% Elephants represent a high level of energy efficiency .

A.        In mammals -

Insectivorous 0.86% Very little .

Rodents -1.51%

Big eaters ( Large herbivores ) 3.14%

Two.        Poultry -1.29%

Three.        Fish 9.8% ( Body temperature varies with ).

Four.        Invertebrates 25%

-           Only a small fraction of the energy can move from one masonite Second !

-           Each level masonite will always be smaller than the level on which it is based( This is below ).

-           Pyramid Food :

Primary producers ( Green plants ) -> Secondary consumers ( Eaters ) ->Tertiary consumer ( Predators ) -> Quarterly consumer ( Super predators ).

Apparently there is no food chain food web but , We have many manufacturers eaten by " S consumers are eaten by many " S many consumers . The more complex fabric - It is more stable !

As you walk up the pyramid - That declining tax ' Life at any stage .

Eg - Estuary food web .

Primary producers - Shore plants and water plants .

Secondary consumer - Snails , Fish , Insects

Tertiary consumers - Seabirds , Rats ( Eat all ) Mice .

Quarterly consumer - Secondary tropical - Birds of prey .

Joints - Bacteria and bacteria that care untapped material .

Relationship caps Between two levels Foods By various " P. energetic value - (The best way to measure )

Primary producers 8763 Keck " To Per year .

Primary consumers - Herbivores 596 K. " To

Predators - 48 K. " To .

Joints 3800 K. " To .

Important ecological lessons :

-           Food web , Each level masonite will always be smaller than the level that it consumes foods ( Terms of energy And biomass Mostly ).

-           The food web is always more stable than the food chain .

-           Since higher levels of food ( Top predators ) Fabric has " As less information and less species , Sensitivity of these tropical levels to changes in environmental conditions will increase !

-           Since high levels...
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