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landscape Merchant's model

of ecological revolutions that

conceptualizes the relations among coexisting and coequal facets of natural and social forces that together shape the outcome of landscape alterations, air pollution, or water consumption.

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ecological core is | model of wealth & worldviews | ecosystems are? | landscapes change

AIR

LAND WATER

tree and grass

Does she adequately depict how landscape changes occur?

deforestation

Land is an ecological system of living and non-living actors.

The relation of humans to nature is reciprocal.

Human dynamic natural fluctuations

landscape

society
biotic community
economy
genetic diversity
politics
physical conditions

Palos Verdes

Peninsula by the sea.

polycheate worm reef is an amassing of indviduals.

 

history and biology

The ecological core is the focal point of ecological and environmental history so Merchant places it at the center of her concentric circular model of the dynamic conditions of existence.

Simple three concentric sphere model

quantifying the core

 

Ecological Core: the necessary natural constraints inherent in water, energy, atmosphere and landscape, together with vegetation and wildlife.

AKA: An ecological model of three concentric relations:

core versus the periphery

tree and grass

ecological core is | model of wealth & worldviews | ecosystems are? | landscapes change

spectrum

 

Land, Labor & Worldview.

world

see also: ecomod.htm

tree and grass

ecological core is | model of wealth & worldviews | ecosystems are? | landscapes change

spectrum

An ecosystem, or ecological system as a set of biophysical conditions where energy is converted into matter in a particular area over time by the inhabitants, usually prokaryotic and eukaryotic bacteria and plants.

ecobigeo.JPG

Both halves, the habitat and the biological community, function together as a unit providing a source of wealth, stability and essential services.
      1. wealth
        1. resources such as fish, gold, oil, diamonds, domestic animals.
        2. real estate, property, mineral or water rights
        3. waterfalls exhibit gravitational power
        4. forests provide timber, drinking water, scenery
        5. water provides transport
      2. stability
        1. water bodies temper extreme heat and cold
        2. wetlands absorb flood water and purify water
        3. trees provide shade and protect soil from erosion
        4. plants moderate temperature and retard soil erosion
        5. wildlife indicate character of native conditions
      3. essential services
        1. moving water purifies wastes, transports sediment,
        2. mountains collect and store snow and rain water,
        3. aquifers, lakes and streams hold water,
        4. wind cleans away contaminated air,
        5. plants make oxygen, reduce the temperature (shade),
        6. bacteria and fungi assist vegetation growth.

        ecosystem servicestree and grass

ecological core is | model of wealth & worldviews | ecosystems are? | landscapes change

spectra

model | ecology | web site | science

Ian McHarg

 

Alfred Crosby as a contrast

Landscape

landscape's competing values

Cultural landscapes

Landscape changes

Landscape change due to technology

Value of Diversity, Wilson

Identifying natural values

tree and grass

ecological core is | model of wealth & worldviews | ecosystems are? | landscapes change