Columbia Plateau Ecoregion Conservation Planning
Abstract
of article in Parks
Final Report to TNC
Problem Statement
The Nature Conservancy (TNC) identifies portfolios
of sites and strategies that will maintain viable native species
and representative plant communities. TNC wants to modify its approach
such that it can produce a conservation plan that will provide guidance
for TNC field offices and agency and non-governmental partners on
how to pursue protection of this portfolio of sites, and how to
integrate various conservation strategies (which might include actions
such as influencing particular policies, zoning, and identifying
key influences on critical ecological processes) with land acquisition
and/or management designation of particular sites. Further, TNC
needs recommendations for how they should implement this ecoregional
conservation planning approach throughout the organization, in contrast
to its current state or national scope of planning.
TNC is looking to develop a prototype planning
process for the Columbia Plateau ecoregion.
Three questions are germane to the development of this prototype
application:
1. What set of site selection rules provides
the most efficient method for designing and assembling a portfolio
of sites to maintain all viable native species and community types
within a target ecoregion (i.e., how can TNC maximize the amount
of biodiversity protected relative to the given number of conservation
sites or amount of land area)?
2. How sensitive is the portfolio to the way in which biodiversity
is measured (e.g., what are the effects of using a coarse-filter
(alliances from Gap Analysis) or fine-filter (rare element occurrences
for species and plant community associations from Natural Heritage
programs)?
3. How can TNC integrate programmatic, economic and socio-political
factors into the portfolio design process without sacrificing its
biodiversity goals?
The UCSB Biogeography Lab (UCSB) proposed
to adapt preserve selection models we have developed for other recent
projects to the task of setting alternative conservation priorities
in the Columbia Plateau. Through discussion with TNC about its goals
for the project, the BMAS model
developed originally at UCSB for the Sierra
Nevada Ecosystem Project is being adapted to this project. We
will be on working with TNC to define a reasonable set of alternatives
with explicitly defined sets of assumptions, objectives, measures
of biodiversity, and other model parameters, and then to apply the
model. The output of this analysis will be alternative sets of planning
units that satisfy the multiple objectives of each alternative portfolio
strategy.