BASICS OF THE ENVIRONMENT:

ECOLOGY

Justin Ray M Guce

What is ECOLOGY???

ORGANISMS

ABIOTIC FACTORS

INTERACTIONS

RELATIONSHIPS

CYCLES

BIOTIC FACTORS

What is ECOLOGY???• Interactions among

organisms and between organisms and their environment

• Ernst Haeckel (1866)

What is ECOLOGY???

Oikos (greek) house

BIOSPHERE- Largest house in nature

LEVELS of ORGANIZATION

BIOMES

SPECIES

COMMUNITY

POPULATIONECOSYSTEM

TERMS to REMEMBER

• Ecosystem– Biological

community + physical environment

• Ecological Niche– Status or role of an

organism in its environment

TERMS to REMEBER

• Ecological succession– sequence of communities– development in an area– colonization stable climax community

ECOLOGICAL SUCCESSION

• Climax community– relatively stable

ecosystem – last stage of ecological

succession.

• Opportunist species– Plant species(short life-

span)– producing seeds.

• Pioneer plants/communities– first to be established– Area empty of life

• Primary succession:– Succession – completely empty of

life

• Secondary succession– life once existed but

has then been destroyed

FLOW OF ENERGY

TROPHIC LEVELS

FEEDING RELATIONSHIPS

ECOLOGICAL PYRAMIDS PYRAMID of

NUMBERS

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