We on the Adaptive Management Work Group (amwg)
have been working in committee meetings for nearly two years to write
a Strategic Plan for the Adaptive Management Program to benefit downstream
resources. It will provide direction to all river research and long-term
monitoring projects for the near future and influence our recommendations
to the Interior Secretary on how to accomplish the primary directive of
the Grand Canyon Protection Act of 1992. That directive is to operate
the dam to preserve, mitigate adverse impacts to, and improve the values
for which the two national parks were created, including natural and cultural
resources and visitor use. We plan to complete the Strategic Plan for
acceptance by the full amwg in July, 2001. As your recreation representative
on the amwg, I've worked to include language that places value on
native species, natural pattern and process, and adequate public access.
So far, we've drafted a Vision-Mission statement, 8 Principles,
13 Goals, 54 Management Objectives arrayed beneath the Goals, and a Glossary
of Terms.
Presently, we are “putting flesh on the bones” of the Management
Objectives by quantifying our baseline and target levels for each one.
I am leading the effort to quantify the Management Objectives for Recreation
Goal 10 and Sediment Goal 6.
Following, is the draft Strategic Plan language we've developed
to date. I've only included the Management Objectives for Recreation
Goal 10. If you want to see the other Management Objectives or the Glossary,
or provide your thoughts, contact me at gcrg@infomagic.com, attn: amp
Strategic Plan.
It's a good time for feed back. I'm all ears.
Andre Potochnik
Glen Canyon Dam Adaptive Management Program
Draft Strategic Plan—November, 2000
This document consists of the following components, which should be viewed
as an integrated whole. Together, they guide the work of the Glen Canyon
Dam Adaptive Management Work Group.
Vision and Mission
Principles
Goals
Management Objectives
Glossary of TermsVision and Mission
The Grand Canyon is a homeland for some, sacred to many, and a national
treasure for all. In honor of past generations, and on behalf of those
of the present and future, we envision an ecosystem where the resources
and natural processes are in harmony under a stewardship worthy of the
Grand Canyon.
We advise the Secretary of the Interior on how best to protect, mitigate
adverse impacts to, and improve the integrity of the Colorado River ecosystem
affected by Glen Canyon Dam, including natural biological diversity (emphasizing
native biodiversity), traditional cultural properties, spiritual values,
and cultural, physical, and recreational resources through the operation
of Glen Canyon Dam and other means.
We do so in keeping with the federal trust responsibilities to Indian
tribes, in compliance with applicable federal, state, and tribal laws,
including the water delivery obligations of the Law of the River, and
with due consideration to the economic value of power resources.
This will be accomplished through our long-term partnership utilizing
the best available scientific and other information through an adaptive
ecosystem management process.Principles
The Glen Canyon Dam Adaptive Management Work Group embraces the following
Principles. They guided development of the Goals and Objectives for the
Glen Canyon Dam Adaptive Management Program (gcdamp). These Principles
are:
The Goals represent a set of desired outcomes that together will accomplish
our Vision and achieve the purpose of the Grand Canyon Protection Act.
Some of the Objectives and actions that fall under these Goals may not
be the responsibility gcdamp, and may be funded by other sources, but
are included here for completeness.
The construction of Glen Canyon Dam and the introduction of non-native
species have irreversibly changed the Colorado River ecosystem.
Much remains unknown about the Colorado River ecosystem below Glen Canyon
Dam and how to achieve gcdamp ecosystem Goals.
The Colorado River ecosystem is a managed ecosystem. An ecosystem management
approach, in lieu of an issues, species, or resources approach, will guide
our efforts. Management efforts will prevent any further human-induced
extirpation or extinction of native species.
An adaptive management approach will be used to achieve gcdamp ecosystem
Goals, through experimentation and monitoring, to meet the intent of the
Grand Canyon Protection Act, the Environmental Impact Statement, and the
Record of Decision.
Management actions, including changes in dam operations, will be tried
that attempt to return ecosystem patterns and processes to their range
of natural variability. When this is not appropriate, or beyond the range
of operational flexibility of the dam, experiments will be conducted to
test other approaches.
Because management actions to achieve a Goal may benefit one resource
or value and adversely affect another, those action alternatives that
benefit all resources and values will be pursued first. When this is not
possible, actions that have a neutral impact, or as a last resort, actions
that minimize negative impacts on other resources will be pursued, consistent
with the final Glen Canyon Dam eis and the Record of Decision.
Recognizing the diverse perspectives and spiritual values of the stakeholders,
the unique aesthetic value of the Grand Canyon will be respected and enhanced.
Goals
Goal 1. Protect or improve the aquatic foodbase so that it will support
viable populations of desired species at higher trophic levels.
Goal 2. Maintain or attain viable populations of existing native fish
and remove jeopardy from humpback chub and razorback sucker.
Goal 3. Restore populations of extirpated species, as feasible.
Goal 4. Maintain a wild reproducing population of rainbow trout above
the Paria River, to the extent practicable and consistent.
Goal 5. Establish water temperature, quality, and flow dynamics to achieve
gcdamp ecosystem goals.
Goal 6. Maintain or attain levels of sediment storage within the main
channel and along shorelines to achieve gcdamp ecosystem goals.
Goal 7. Maintain or attain viable populations of Kanab ambersnail.
Goal 8. Protect the presence of southwestern willow flycatcher and its
critical habitat in a manner consistent with riparian ecosystem goals.
Goal 9. Protect or improve the biotic riparian and spring communities.
Goal 10. Maintain or improve the quality of recreational experiences for
users of the Colorado River ecosystem, within the framework of gcdamp
ecosystem goals.
Goal 11. Maintain or increase power and energy generation within the framework
of gcdamp ecosystem goals.
Goal 12. Preserve, protect, manage, and treat cultural resources for the
inspiration and benefit of past, present and future generations.
Goal 13. Maintain a high-quality monitoring, research, and adaptive management
program.Management Objectives for Goal 10
mo35: Maintain physical access and safety for visitors to the main stem.
mo36: Maintain or improve the quality and quantity of the recreational
spectrum in Glen Canyon.
mo37: Maintain or increase camping beaches along the main stem, including:
size, quality, number, and distribution.
mo38: Maintain or improve the navigability of rapids in the main stem.
mo39: Maintain or enhance the wilderness experience in Grand Canyon.
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Glossary of Terms
Adaptive Management: Adaptive management is an iterative
process, designed to experimentally compare selected management actions
by evaluating alternative hypotheses about the ecosystem being managed.
It consists of three parts: management actions, monitoring, and adaptation.
Management actions are treated as experiments subject to modification.
Monitoring is conducted to detect the effects of the management actions.
Finally, management actions are refined based on the enhanced understanding
about how the ecosystem responds.
Biodiversity: Biodiversity is “the variety of organisms
considered at all levels, from genetic variants belonging to the same
species through arrays of species to arrays of genera, families, and still
higher taxonomic levels [including]…the variety of ecosystems…”(38)
Biotic Community: A biotic community is a “group
of organisms…that co-occur in the same habitat or area and interact
through trophic and spatial relationships…”(20)
Colorado River Ecosystem: The Colorado River ecosystem
is the Colorado River mainstem corridor and interacting resources in associated
riparian and terrace zones, located primarily from the forebay of Glen
Canyon Dam to the western boundary of Grand Canyon National Park. It includes
the downstream inundation level to which dam operations impact physical,
biological, recreational, cultural, and other resources. The scope of
gcdamp activities may include limited investigations into some tributaries
(e.g., the Little Colorado and Paria Rivers).
Conceptual Model: A conceptual model is an “assessment of the dynamics
of the more important compartments and fluxes of material or energy in
a system [i.e., patterns and processes], or of changes in a population.”(20)
A conceptual model is a heuristic tool to provide a framework for thinking
about how an ecosystem functions and to discover gaps in our knowledge.
Cultural Resources: Cultural resources includes, but is not necessarily
limited to, any prehistoric or historic district, site, building, structure,
landscape, or object included in, or eligible for inclusion in the National
Register, including artifacts, records, and material remains related to
such a property or resource. Properties of traditional religious and cultural
importance to an Indian tribe are included in this definition under Section
101(d)(6)(A) of nhpa.
Ecosystem: An ecosystem is “a community of organisms
and their physical environment interacting as an ecological unit.”(20)
An ecosystem consists of patterns and processes that are dynamic and occur
within a particular range of temporal and spatial variability.
Ecosystem Integrity: Ecosystem integrity is “the
ability to support and maintain a balanced, integrated, adaptive biological
system having the full range of elements (genes, species, and assemblages)
and processes (mutation, demography, biotic interactions, nutrient and
energy dynamics, and metapopulation processes) expected in the natural
habitat of a region.”(13) Ecosystem integrity is related to ecosystem
resilience (i.e., the capacity to maintain characteristic patterns and
processes) following a disturbance.
Ecosystem Management: An ecosystem management approach
differs from an issue-, species-, or resource-specific approach. Ecosystem
management is a method for sustaining or restoring ecosystems and their
functions and values. “It is goal driven, and it is based on a collaboratively
developed vision of desired future conditions that integrates ecological,
economic, and social factors. It is applied within a geographic framework
defined primarily by ecological boundaries.”(11) Ecosystem management
is a process that attempts to mimic appropriate ecosystem patterns (abundance
and distribution of species and habitats) and ecosystem processes (drivers
of ecosystem patterns). It includes managing for viable populations of
all native species.
Ecosystem Patterns: Ecosystem pattern is the abundance
of species, biotic communities, and physical habitats, as well as their
spatial and temporal distribution. This is a broader concept than “composition
and structure.” Composition usually refers only to species presence
or absence, and structure usually refers to the distribution of biotic
communities.
Ecosystem Processes: Ecosystem processes are the abiotic
(i.e., non-living) and biotic (i.e., living) functions, disturbances,
or events that shape ecosystem patterns. There are physical processes
(e.g., fire, hydrologic, geomorphic, and climatic regimes; air chemistry,
nutrient cycling), biological processes (e.g., competition, predation,
herbivory, parasitism, disease, migration, dispersal, gene flow, succession,
recruitment, maturation), and anthropogenic processes (e.g., habitat conversion,
novel toxins, vandalism).
Monitoring: Monitoring is the “collection and analysis
of repeated observations or measurements to evaluate changes in condition
and progress toward meeting a management objective.”(4) Monitoring
needs to produce data of sufficient statistical power to detect a trend
if in fact it is occurring.(8) Monitoring differs from inventorying, which
is the measurement of environmental attributes at a given point in time
to determine what is there. It also differs from research, which is the
measurement of environmental attributes to test a specific hypothesis.
Range of Natural Variability: The Range of Natural Variability
is the spatial and temporal variation in ecosystem patterns and ecosystem
processes under which the ecosystem has evolved. The range of natural
variability for ecological processes is usually defined by their frequency
(e.g., number/year), intensity (e.g., cubic feet per second), duration
(e.g., number of days), magnitude (e.g., acres), seasonally, and rate
of change. See Landres(18) for a full discussion.
Reasonable and Prudent Alternative: “Reasonable
and prudent alternatives refer to alternative actions identified during
formal consultation that can be implemented in a manner consistent with
the intended purpose of the action, that can be implemented consistent
with the scope of the Federal agency's legal authority and jurisdiction,
that is economically and technologically feasible, and that the Director
believes would avoid the likelihood of jeopardizing the continued existence
of listed species or resulting in the destruction or adverse modification
of critical habitat.”(5)
Reasonable and Prudent Measure: “Reasonable and
prudent measures refer to those actions the Director believes necessary
or appropriate to minimize the impacts, i.e., amount or extent of incidental
take.”(5)
Recovery: Recovery is improvement in the status of a
listed species to the point at which listing is no longer appropriate,
under the criteria set out in section 4(a)(1) of the Endangered Species
Act (5).
Removal of Jeopardy: To “jeopardize the continued
existence of [a listed species] means to engage in an action that reasonably
would be expected, directly or indirectly, to reduce appreciably the likelihood
of both the survival and recovery of a listed species in the wild by reducing
the reproduction, numbers, or distribution of that species.”(5)
Removing (or avoiding) jeopardy is intended to be accomplished through
the implementation of reasonable and prudent alternatives.
Riparian Ecosystem: The riparian ecosystem is the streamside zone that
is influenced by riverine processes, e.g., flood regime and distance to
subsurface water.
Riverine Ecosystem: The riverine ecosystem is any area
typically inundated by the river.
Viable Population: A population is considered viable when there is a high
chance of persistence over a long timeframe without demographic or genetic
augmentation. Population viability is not the same as “recovery”
or “removal of jeopardy” for a species. However, the concept
of population viability is an important consideration in determining recovery
and removal of jeopardy.
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