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    Ecological Concept

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    Jethro Exequiel Sibayan
    The document discusses key concepts in ecology including ecosystems, biogeochemical cycles, and nutrient cycles. It defines ecology as the study of how organisms interact with each other and their environment. Ecosystems consist of communities of interacting species and their abiotic environment. Nutrients cycle between living and non-living components of ecosystems in biogeochemical cycles, which can be atmospheric, sedimentary, or hydrologic depending on whether the nutrient exists as a gas, solid mineral, or water.

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    Ecological Concept

    Uploaded by

    Jethro Exequiel Sibayan
    69 views15 pages
    The document discusses key concepts in ecology including ecosystems, biogeochemical cycles, and nutrient cycles. It defines ecology as the study of how organisms interact with each other and their environment. Ecosystems consist of communities of interacting species and their abiotic environment. Nutrients cycle between living and non-living components of ecosystems in biogeochemical cycles, which can be atmospheric, sedimentary, or hydrologic depending on whether the nutrient exists as a gas, solid mineral, or water.

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    Environmental Engineering

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    The document discusses key concepts in ecology including ecosystems, biogeochemical cycles, and nutrient cycles. It defines ecology as the study of how organisms interact with each other and their environment. Ecosystems consist of communities of interacting species and their abiotic environment. Nutrients cycle between living and non-living components of ecosystems in biogeochemical cycles, which can be atmospheric, sedimentary, or hydrologic depending on whether the nutrient exists as a gas, solid mineral, or water.

    Copyright:

    © All Rights Reserved
    Download as PPT, PDF, TXT or read online from Scribd
    Download as ppt, pdf, or txt
    69 views15 pages

    Ecological Concept

    Uploaded by

    Jethro Exequiel Sibayan
    The document discusses key concepts in ecology including ecosystems, biogeochemical cycles, and nutrient cycles. It defines ecology as the study of how organisms interact with each other and their environment. Ecosystems consist of communities of interacting species and their abiotic environment. Nutrients cycle between living and non-living components of ecosystems in biogeochemical cycles, which can be atmospheric, sedimentary, or hydrologic depending on whether the nutrient exists as a gas, solid mineral, or water.

    Copyright:

    © All Rights Reserved
    Download as PPT, PDF, TXT or read online from Scribd
    Download as ppt, pdf, or txt
    of 15

    Ecology of life

    Ecosystem
    Biogeochemical Cycle

    The term ecology was coined by German


    biologist Ernst Haeckel, but the discipline of
    ecology was created about 100 years ago

    Greek word oikos meaning house or


    place to live

    logos meaning is study of

    Ecology is the study of how organisms


    interact with one another and with their non
    living environment including such factors
    as sunlight, temperature, moisture and vital
    nutrients

    Ecologist focus on trying to understand the


    interactions among organisms,
    populations, communities, ecosystem
    and ecosphere

    It can be classified into


    species groups of
    organisms that resemble
    one another in appearance,
    behavior, chemistry and
    genetic endowment.

    Population consists of all


    members of the same
    species occupying a specific
    area at the same time
    Eg: sunfish in the pond
    White oak trees in the forest

    Populations are dynamic


    groups that change in size,
    age, distribution, density
    and genetic composition as
    a result of changes in
    environmental conditions

    Community or
    biological
    community
    Populations of all
    different species
    occupying and
    interacting in a
    particular place

    Ecosystem It is a
    community of different
    species interacting with
    one another and with
    their nonliving
    environment of matter
    and energy.

    Ecosystem can be
    natural of artificial
    (human created) .

    Examples of human
    created ecosystems are
    cropfield, farm ponds
    and reservoirs and
    artificial lakes created
    behind dams.

    To be sustainable for some


    specified period of time, an
    ecosystem must contain the
    energy and nutrients
    resources needed to support its
    resident organisms and to
    dispose of and recycle their
    wastes.

    All of the earths ecosystems


    together make up what we call
    the biosphere or ecosphere.

    NUTRIENT CYCLE OR
    BIOGEOCHEMICAL CYCLE

    Any atom, ions or molecule an organism


    needs to live, grow or reproduce is called
    nutrient.

    These nutrient atoms, ions and molecules


    are continuously cycled from the nonliving
    organisms (air water soil rock) to living
    organisms (biota) and then back again in
    what are called nutrient cycles or
    biogeochemical cycles (literally life earth
    chemical cycles)

    There are three general types


    of biogeochemical cycles:
    1. atmospheric
    2. sedimentary and
    3. hydrologic

    In atmospheric cycle, a large portion of a


    given element exists in gaseous form in the
    atmosphere.

    Examples are nitrogen gas (N2) and carbon


    dioxide (CO2) gas, which cycle fairly rapidly
    from the atmosphere, through soil and
    organisms, and back into the atmosphere.

    In sedimentary cycle, an element either


    does not have a gaseous phase or its
    gaseous compounds dont make up a
    significant portion of its supply.

    In this case, the earths crust is the main


    storehouse.

    Such element cycle quite slowly , moving


    mostly from the land to sediments in the
    seas and then back to land through long
    term geological uplifting of the earths crust
    over millions to hundreds of millions of
    years.

    Phosphorus and most nonrenewable


    solid minerals are circulated in such
    cycles.

    In the hydrologic cycle or water cycle, water


    in the form of ice, liquid water and water
    vapor cycles through the ecosphere.

    In this case the hydrosphere is the main


    storehouse. This cycle operates at the local
    regional and global levels.

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