Ecological
integrity
So
what is it?
A capacity to sustain the world as fused in an intricate, but self-renewing manner – with no need of human intervention – while subject to increasing entropy.
An underlying, unimpaired coexistence of forms, functions, and participants inhabiting an area or dwelling in places, that maintain the flows of water, energy, nutrients, air, and trace elements used for shelter, nourishment, and growth based on the quality, quantity, timing, and distribution of essential resources.
Every human has the capacity to imagine how the world is tied together in an intricate, but self-sustaining manner – but has no need of human intervention and may even resist our interference.
An ecological
imagination apprehends and understands the underlying integrity of forms, functions,
and participants inhabiting an area or coexisting in any place, that sustains the world.
But the further need for such an imagination is necessary in order to protect the natural systems on which life and human society together depend.
- forms–meaning
landscape features (forests,
ridges, creeks, marshes), topography, sun angle,
hydrology & geography,
- functions–such as food webs: producers, consumers and decomposers, and
- participants–bacteria, plants, fungus, animals, communities etc.
- being whole & undivided in its form and functionally unimpaired.
Explanation | Science | Image | Ten facets of | integrity | endocrine disruption | mutagenicity
Glacier
National Park, valley on the Idaho and Montana boundary:
An
Idaho mountain valley's geographical and vegetational relationships
are based, in part, on complex links among water, wildlife, fisheries
and human recreation.
There are Complex
relations that contribute to ecological integrity:
Glacier National Park changes from 1850 until today and in the future.
The functional
and structural necessity of water,
sunlight, temperature, climate, chemical nutrient cycles, moderate
acidity and alkalinity (or pH), and the geographical access of living
creatures to and from adjacent ecosystems. Each link in the chain of being
ties each and every creature to the functional necessity of water,
energy, air and landscape. This chain of being is no stronger than
its weakest links.
Explanation
| Science | Image
| Ten facets of
| integrity | endocrine
disruption | mutagenicity
We are one
entity with the inhabited world.
Next.
Nature is a problem
for humans because we, in our ignorance, avarice, and insecurity, believe
we can have something for nothing; cheat the natural system and get away with
biocide.
The integrity of ecosystems depends
on:
quantity
quality
timing
distribution
of
water, nutrients, trace elements and minerals.
Rubrics cube of integrated facets, as one changes they all change:
Explanation | Science | Image | Ten facets of | integrity | endocrine
disruption | mutagenicity
Next.
Animals
are indicators of ecological conditions.
Elephants at the Goas watering hole on the Etosha Pan, Namibia, Africa.
Canaries in
the coal mine analogy.
This metaphor means that animals are indications of damage or destructive situations and their death indicates not just the loss of a species, but the potential degradation of the places they had inhabited.
Bats, moths, mites,
mosquitoes -- a simple systemic relationship, pollinators
Birds, 11% face extinction 70% in decline, tied to insects who are pollinators
of food crops
Womens breast cancer
Carson, Obligation
to Endure.
Murray Bookchin & Rachel Carson 1962.
Both writers warned of
chemical & radioactive wastes contaminating our very bodies, genes and fatty tissues.
People born in 1950s
& 1960s have:
strontium -
in our bones
DDT - in our fat tissues
dioxin - in our tissues
Explanation
| Science | Image
| Ten facets of
| integrity | endocrine
disruption | mutagenicity
Next
Sandra Steingraber, Living Downstream:
An Ecologist Looks at Cancer and the Environment (1997)
Enzymes
| endocrine disruption | mutagenicity
Nuclear tracers can help us understand nature, or they can kill us have
we the wisdom to choose between the two alternatives?
EDSTAC
Endocrine Disrupting Screening and Testing Advisory Committee, 1998 report (summer: 1998),
public response is essential.
Next
Explanation | Science | Image | Ten facets of | integrity | endocrine
disruption | mutagenicity
Environmental
factors in cancer
genetic factors
in cancer
transcription (RNA from DNA)
duplication (DNA replicates)
in enzyme manufacture (shut down cell division, repair DNA sequences,
triggers)
oncogenes -- cancer causing viruses, P-53 gene, SRC or sark
gene when expressed
retroviruses (RNA takes over nuclear DNA)
Genes adapt us to a range of conditions to which we may readily respond.
Receptors in
the body, cells & tissues alert glands & trigger responses in
hormonal secretion.
Levels trigger
certain other related responses in glands, organs & metabolism.
Endocrine disrupters are estrogen, androgen and thyroxin mimics (femaleness, maleness, metabolism)
Next
Environmental
factors in cancer
Epidemiological
studies .... Comparison of the incidence of various cancers among Japanese
citizens, American citizens and Japanese who have emigrated to the United
States shows quite convincingly that most cancers are attributable to
environmental factors.
stomach,
colon, pancreas, lung, leukemia
1: most cancers are environmentally caused.
2: most
cancers are preventable
Gordon
Edlin, Human Heredity, (Boston: Jones & Bartlett Publishers, 1990),
p.188 - 189
Leukemia deaths among children in southern Utah was two to three times
higher than children not exposed to above ground fallout from nuclear
bomb tests.
Enzymes are critical to understanding human vulnerability:
endonuclease
breaks the sugar phosphate backbone of DNA
exonuclease removes damage nitrogen bases (thymine dimers from UV exposure)
polymerase I repairs gaps in the DNA sequence from the opposite strand
DNA ligase rebuilds the sugar-phosphate bonds
loss of any one of the repair enzymes can be lethal... repair
of radiation damage is essential to the survival of cells.
p. 191.
Next
Sources of mutagenic agents:
smoking * 20-25%
of all deaths in the US attributed to smoking
flame retarding tris-BP
hair dyes (150/169)
burning, incineration
Occupational health risks from carcinogens
The LOCATION OF CANCER
Chemical workers
Benzidine, bladder
Napthylamine, bladder
glue & varnish Benzene, leukemia (Bone marrow cancer)
PVC manufacture polyvinyl chloride, Liver
Chromate manufacture chrome ores, Bronchus*
The incidence of testicular cancer.
Recent experiments
have shown that a chemical in cigarette smoke is converted in cells into
a chemical that is able to activate certain oncogenes.
(199)
Somatic-cell
mutations trigger the onset of most cancerous diseases. These mutations
are caused by environmental agents and, because the affected cells are
somatic, the defective genes can not be inherited, However, some rare
heritable human disorders may predispose their victims to the development
of cancer.
(202)
entropy
The measure of disorder or increasing randomness in any system. The loss of order in a system due to the degradation of energy over time.
Second Law of Thermodynamics holds that over time kinetic energy becomes less available to do mechanical work because of a build-up of random motion in atoms and compounds that is measured as an increase in heat.
Sandra Steingraber, Living Downstream: An Ecologist Looks at Cancer and the Environment (1997).
Gordon
Edlin, Human Heredity, (Boston: Jones & Bartlett Publishers, 1990),
p.188 - 189.
Fritjof Capra, The Web of Life.
Rachel Carson, Silent Spring.
Garrett Hardin, Ecolacy.
David Orr, Ecological Literacy.
Lewis Thomas, The Lives of the Cell.
Terry Tempest Williams, An Unspoken Hunger.