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Chapter 1

ENV310H5 Chapter Notes - Chapter 1: Maximum Sustainable Yield, Sustainable Yield, Physical Law

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Barbara Murck

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Introduction + Chapter 1
The theo of soial ostutiis offes oe eplaatio as to ho defiitio ad atio ae elated,
especially in sustainability.
o According to constructivism, meanings and identities are formulated through interactions and
o It states that language is constructive or constitutive of social reality.
o Words not only act as symbols that represent the world but shape the reality they represent as
well. Language shapes social realities by fostering certain kinds of actions.
o That is to say, the meaning we attach to another actor, an object, or even to a concept is not
predetermined but constructed through communication and language
If a universally accepted, clear, and exact definition of sustainability existed, it is unlikely that we would
see suh a ast diffeee i degee of effia etee atiities eaked upo i the ae of
o In other words, examples of sustainability programs, operations, actions, and policies vary
greatly in their intents, end goals, and outcomes, indicating that sustainability does not, in fact,
mean the same thing to everyone but rather means everything to everyone.
A brief history
Preservation or conservation?
o How to administer the earths natural resources appropriately?
o it was not until the sixteenth century that human populations began to generate significant
impacts on ecological systems due to the economic exploitation of the eath’s atual esoues
o Conservation
Says to USE natural resources
However also considers biological limits to the resources
Sustainable yield In forest management, maximum sustainable yield refers to the
rate of extraction possible that does not exceed the rate of growth.
I othe ods, a sustaiale ield of a tee stad efes to felligs hih ae
not more than growth of timber during the accounting period
Its not exploitation because that would just cit down the ENTIRE forest and destroy it,
but conservation uses both a consumptive aspect and a protective quality
o Preservation
Does’t fous o the use, ut istead settig esoues aside
The non-use or the non-consumptive use of a resource.
Ie In a pak, fo istae, eeatioal, eduatioal, o sietifi atiities a e
permitted (non-consumptive use) but the park is otherwise left alone in terms of
consumption of its resources.
o people arguing for or against
Muir and the preservation approach suggest is that the ost effiiet ethod of
sustaining what we have now is to respect nature by leaving it alone to thrive without
human intervention.
Peseatio, as shaped  Mui, eae the hads-off appoah to
management; nature is best served when we do not intervene and wild places
are able to thrive untouched
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