CHAIN AND FOOD NETS

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STUDY OBJECTIVEIdentify process connection eats eaten in food chain and food nets

explain food chain mechanism and food nets

analyze and explain to happen detonation or population waning by using food chain concept

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INTRODUCTION

connection mutual influence insides ecosystem not simple and static.

interaction action deliver componentin ecosystem can happen in the case of the need fulfillment.

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ENERGY CURRENT

energy transfer and matter transfer that from mortal one to mortal other

sunlight energy source for all existing mortal life earth thing

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picture 12.1: a ecosystem involves two process that is energy currents and chemistry cycle. energy enters in the form of sunlight then changed to be chemistry energy by organism autotrof, and sustained to organism heterotrof in the form of organic compound in the food, and throw away in the form of hot. (source: campbell, edition biology fifth)

CHEMISTRY CYCLE

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PRODUCERS

Producers makes use sun energy to produce food passes photosynthesis. Sun energy is made chemistry energy

picture 12.2: watch closely photosynthesis phenomenon under teacher guidance (source: suparwoto, 2008)

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CONSUMER

Furthermore chemistry energy flow in ecosystem passes various consumer stage in food chain, that is primary consumer, secondary and tertiary. Chemistry energy in consumer stage is used for mortal activity like to move, grow, and dead

picture 12.3: make use group energy herbivorous (source: suparwoto, 2008)

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PRODUCERS ENERGY CURRENT IN ECOSYSTEM

picture 12.4: make use producers group energy (source: campbell, edition biology fifth)

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CARNIVORES

picture 12.5: food circulation chain (source: suparwoto, 2008)

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FOOD NETS

All energy transfer possibilities and food transfer between mortal in a ecosystem

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Food chain example estrial (land) and marin (sea)

picture 12.6: energy and butrient via pass levels trofik a when does Organism mutual consume one another. (source: campbell, edition biology fifth)

FOOD NETS

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A Food Net

picture 12.7: connection eat-to eat that simplified this doesn't cover all species that eat in each levels trofik. look at that several species consume more than one levels trofik. (source: campbell, edition biology fifth)

FOOD NETS

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ECOLOGY PYRAMID

In ecosystem every organism always occupied level trofik certain. Three ecology pyramid kinds: Total (density and population between level trofik) Biomasa (when is certain alive matter heavy classification) Energy (energy current speed in standard trofik suksesi)

Suksesi communities change process that aim to one way according to Climax suksesi end when achieve climax happen ecosystem balance Homeostatis communities can to watch over the internal condition

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picture 12.8: a clean productivity pyramid ideal

10% from energy available in every level trofik changed to be biomassa new in level trofik at on it. Look at that primary producers changes only around 1% from sunlight energy. In ecosystem actually, productivity depreciation with energy transfer between levels trofik vary in certain species; number 10% be a coarse average. (source: campbell, edition biology fifth)

ECOLOGY PYRAMID

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SUKSESIStage suksesi Colonization. a habitats mastery form by mortal Place modification place character modification (habitats) that done by mortal colony

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KIND SUKSESI

Suksesi primary pioneer organism (crust mould and alga) form soil from rock spore is brought wind makes to grow it larger ones plant invasion likes nail Suksesi secondary ecosystem development after happen natural damage or human manner

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DIFFERENCE SUKSESI PRIMARY AND SECONDARY

Beginning organism In suksesi primary, habitats and pioneer organism from new kind that comes from area other In suksesi secondary, permanent habitats and the communities equal to communities at first

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COMPOSERS

SENO HARTONO,S.T.PM. RIYANTO,S.T.PSMKN 33 JAKARTA

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PRACTICETo realize about energy current, perceive insident in ecosystem at environment around you, and write mortal name play a part in energy current process. table 4.2. energy current in ecosystem

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Factor That Influence Suksesi

Vast beginning communities that broken because disturbance Plant kind Presence spread seed Climate Soil kind formed Character and existing plant kind around place the happening of suksesi

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