Filtering by
- All Subjects: Endangered species
- All Subjects: Conservation biology
- Creators: Pima County (Ariz.). County Administrator's Office
The pygmy-owl was listed as endangered in 1997, but notice of the potential listing dates back to 1989. This paper provides a report on pygmy-owl research and rulings, evaluates whether the efforts of the community are leading to the recovery, downlisting and delisting of the pygmy-owl, and concludes that with the exception of valuable in-kind services of the Arizona Game and Fish Department pygmy-owl biologist, meaningful financial support for research and conservation planning efforts has been limited to federal and County contributions.
Recommends which of the over 100 vulnerable species of concern in Pima County should be considered for coverage under the County's future permit and further analyze approximately 50 animals and plants as potentially covered species under the multi-species conservation plan.
Identifies key potential threats and stressors to vulnerable species in Pima County, and to the biological and hydrological resources that support these species. Emphasis has been placed on identifying the specific components of past, existing, and proposed land and water uses that pose the greatest potential threats over the next 30 years to focal species and special habitats, plant associations, and communities.
Describes methods that are used in order to prepare reserve design alternatives in the area of biological conservation. The report also provides a brief history of reserve design theory, and demonstrates how the principles of biological reserve design have been extended to the other Elements of the Sonoran Desert conservation plan.
The most complete version assembled of the story of the 56 plants and animals in Pima County that are in need of protection under the SDCP. Three years ago when discussions began about creating a multi-species protection plan, there was no comprehensive inventory of the resource base.
Species re-establishment is the attempt to establish a species in an area which was once part of its historical range, but from which it has been extirpated or become extinct in the wild. Pima County and other agencies have proposed to re-establish species at a number of sites. Relevant laws and regulations governing re-establishment efforts are discussed. Case studies illustrate how previous efforts have been conducted and how the populations have fared.
Demonstrates that an effort to protect only listed species would lead to a reserve that was closer to the urbanizing areas of Tucson, and therefore more expensive. The Listed Species Reserve is also one that makes a call on more non-federal land. By limiting the focus of the reserve to listed species, the broader and long term benefits are lost, and trade-offs of high potential habitat are not based on such comprehensive biological principles.
The Arizona population of the cactus ferruginous pygmy-owl was listed as an endangered species under the Endangered Species Act in 1997. Historical records and recent surveys definitely show a decline of species. There is a wealth of historical information out there and it still trickles in every day.
We have an opportunity now that we have not had in the past 25 years to develop some comprehensive planning so that we can continue to enjoy the environmental amenities that make it so nice to live in Tucson. These species include not only the common one that we live with on a day to day basis, but also some of the rare species that most of us are not lucky enough to see (but still care about preserving).