|
Adaptive
management - accept disturbance!
The
climate is changing, fish catches are declining and forests are burning
in massive fires.
The
present situation is unsustainable.
We need a system of flexible management that
works with instead of against nature.
ill:
Lina Hedberg
Man wants
control. Control over nature.
Nature
is often seen as something wild and dangerous that needs to be harnessed
in order to fulfill our needs. To ensure consistent harvests, the dose
of pesticides is increased. To save the forests, fires are not
allowed.
To increase fish production, farmed fish fed with wild fish, are released
into the wild.
But there
is a setback to this control.
When
pests, small fires, and other variations in nature are constantly obstructed,
the future capacity of the ecosystem to cope with disturbance is reduced
(ecological resilience (Build resilience).
Possible signs from the ecosystem concerning overfishing or other changes
are masked by farmed fish placed into the wild (Social
resilience). The risk of disturbance is increasing at the same time
as society’s readiness and knowledge about disturbances and ecosystem
functioning is decreasing. When a severe disturbance does occur, there
will not be enough resilience in the ecosystem or in the management systems.
Collapse
will be a reality.
Resistant
pests devour harvests sprayed with pesticides. Protected forests burn
down in unstoppable fires. In planted fish cover up the loss of biological
diversity. Man’s attempts to control these resources have failed.
Handling
uncertainty with resilience
It does not
have to be like this. It is possible to use resources in a way that sustains
both man and nature. We can live a good life and still manage ecosystems
in a way that strengthens both ecological and social resilience. Resilience
is a precondition for the capability of ecosystems and societies to cope
with disturbances.
However,
this first calls for a fundamental change in our understanding of how
nature functions.
And
that is no simple task.
The
dynamic character of nature makes it difficult, if not impossible, to
foresee how ecosystem functions will change in the future with an increased
level of human impact. For example, we cannot say with certainty what
the global effects of increased emissions of carbon dioxide or of a loss
in biodiversity will be.
To
cope with this uncertainty in nature, society must be prepared to work
continuously to identify different types of disturbance. Furthermore,
natural resource management must be able to adapt to new situations and
quickly adjust policies. This in turn, demands knowledge about the functioning
of ecosystems. Knowledge that has to be constantly updated.
Ecological
awareness increases the buffer capacity.
Ecological
awareness is high in natural resource managers and scientists. It can
also be seen in people who spend much of their time out in nature or earn
their living from it, such as hikers or fishermen.
A
solid base of ecological awareness throughout different sectors of society
increases the number of alternatives and solutions available - known as
the buffer capacity - when disturbance strikes. Ecological awareness also
helps improve predictions about the future and reduces the risk of any
negative surprises due to our use of natural resources.
Adaptive
management allows variation and change
A system
of flexible management, which, aided by researchers as well as local users,
takes onboard new information regarding natural systems and consequently
adapts to new situations and disturbances is called adaptive management.
Adaptive management assumes that any management or use of nature is like
an experiment with the consequent need for evaluation and constant improvement.
Adaptive
management is not about controlling nature as we do today. It’s about
allowing small fires in order to avoid the large ones. To tolerate small
scale pest attacks but to reduce their negative impact through small-scale
farms with several crops and fields surrounded by "buffer zones"
with great biological diversity. Buffer zones where the pests’ natural
enemies thrive. To adapt fisheries so they reflect the natural variations
in fish numbers from year to year.
A
system of adaptive management adapts the resource use to the disturbance.
Adaptive management benefits from nature's diversity and services through
a constant revision on how ecosystems work (Ecological services). That
is - to work with nature rather than against it!
This
is simply a necessary step! Especially when considering the human domination
of this planet. How we choose to communally use nature will determine
our children's future.
C.
Holmlund
|