Environmental Management

, Volume 39, Issue 4, pp 460–471 | Cite as

Management by Assertion: Beavers and Songbirds at Lake Skinner (Riverside County, California)

  • Travis Longcore
  • Catherine Rich
  • Dietland Müller-Schwarze
Article

Abstract

Management of ecological reserve lands should rely on the best available science to achieve the goal of biodiversity conservation. “Adaptive Resource Management” is the current template to ensure that management decisions are reasoned and that decisions increase understanding of the system being managed. In systems with little human disturbance, certain management decisions are clear; steps to protect native species usually include the removal of invasive species. In highly modified systems, however, appropriate management steps to conserve biodiversity are not as readily evident. Managers must, more than ever, rely upon the development and testing of hypotheses to make rational management decisions. We present a case study of modern reserve management wherein beavers (Castor canadensis) were suspected of destroying habitat for endangered songbirds (least Bell’s vireo, Vireo bellii pusillus, and southwestern willow flycatcher, Empidonax traillii extimus) and for promoting the invasion of an exotic plant (tamarisk, Tamarix spp.) at an artificial reservoir in southern California. This case study documents the consequences of failing to follow the process of Adaptive Resource Management. Managers made decisions that were unsupported by the scientific literature, and actions taken were likely counterproductive. The opportunity to increase knowledge of the ecosystem was lost. Uninformed management decisions, essentially “management by assertion,” undermine the long-term prospects for biodiversity conservation.

Keywords

Adaptive resource management Endangered species Succession Invasive species Tamarisk Least Bell’s vireo 

References

  1. Albert S (1999). The beaver and the flycatcher. Endangered Species Bulletin 24:16–17Google Scholar
  2. Albert S, Trimble T (2000). Beavers are partners in riparian restoration on the Zuni Indian Reservation. Ecological Restoration 18:87–92Google Scholar
  3. Baker BW (1995). Restoring healthy riparian ecosystems on western rangelands: beaver as a keystone species. Supplement to the Bulletin of the Ecological Society of America 76(2):10Google Scholar
  4. Baker BW, Hawksworth DL, Graham JG (1992). Wildlife habitat response to riparian restoration on the Douglas Creek watershed. In: Proceedings of the fourth annual meeting of the Colorado Riparian Association. Colorado Riparian Association, Boulder, pp 62–80Google Scholar
  5. Brown BT (1993). Bell’s vireo (Vireo bellii). In: Poole A, Stettenheim P, Gill F (eds) The Birds of North America, Volume 35. The Academy of Natural Sciences, Philadelphia; The American Ornithologists’ Union, Washington, D.C., pp 1–20Google Scholar
  6. Cleverly JR, Smith SD, Sala A, Devitt DA (1997). Invasive capacity of Tamarix ramosissima in a Mojave Desert floodplain: the role of drought. Oecologia 111:12–18CrossRefGoogle Scholar
  7. Collen P (1995). The reintroduction of beaver (Castor fiber L.) to Scotland: an opportunity to promote the development of suitable habitat. Scottish Forestry 49:206–216Google Scholar
  8. Collins TC (1976). Population characteristics and habitat relationships of beavers, Castor canadensis, in northwest Wyoming. Unpublished Ph.D. Dissertation, University of Wyoming, LaramieGoogle Scholar
  9. Cook L (2000). A beaver success story. Beaversprite [quarterly newsletter of Beavers: Wetlands & Wildlife] 15(4):6Google Scholar
  10. Davis M (1998). Ecology of fear: Los Angeles and the imagination of disaster. Henry Holt and Company, New York, 484 ppGoogle Scholar
  11. Devitt DA, Piorkowski JM, Smith SD, Cleverly JR, Sala A (1997). Plant water relations of Tamarix ramosissima in response to the imposition and alleviation of soil moisture stress. Journal of Arid Environments 36:527–540CrossRefGoogle Scholar
  12. Dustin DL, Schneider IE (2005). The science of politics/the politics of science: examining the snowmobile controversy in Yellowstone National Park. Environmental Management 34:761–767CrossRefGoogle Scholar
  13. Farwell S (1999a). Beavers will die so birds can survive. The Press-Enterprise [Riverside, California], January 13, B1Google Scholar
  14. Farwell S (1999b). Beavers fly away to new home. The Press-Enterprise [Riverside, California], March 16, A1Google Scholar
  15. Farwell S (2001a). Return of the rare birds. The Press-Enterprise [Riverside, California], January 21, B1Google Scholar
  16. Farwell S (2001b). Expert calls vireo, beaver link doubtful. The Press-Enterprise [Riverside, California], February 2, B3Google Scholar
  17. Finch DM, Stoleson SH (eds) 2000. Status, ecology, and conservation of the southwestern willow flycatcher. Gen. Tech. Rep. RMRS-GTR-60. U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, Ogden, UT, 132 ppGoogle Scholar
  18. Garcia O (1997). Homesteaders who work like beavers. The Press-Enterprise [Riverside, California], April 24, B3Google Scholar
  19. Glausiusz J (1996). Trees of salt. Discover 17(3):30–32Google Scholar
  20. Griffith JC (1999). Letter report regarding the 1999 Southwestern Riverside County Multi-Species Reserve Lake Skinner least Bell’s vireo and southwestern willow flycatcher survey. Griffith Wildlife Biology, Calumet, MI, 7 ppGoogle Scholar
  21. Griffith JT (1995). Letter report regarding the 1995 least Bell’s vireo survey and monitoring at Lake Skinner, California. Griffith Wildlife Biology, Calumet, MI, 11 ppGoogle Scholar
  22. Grinnell J, Miller AH (1944). The distribution of the birds of California. Pacific Coast Avifauna 27:1–608Google Scholar
  23. Gunderson LH, Holling CS, Light SS (1995). Barriers and bridges to the renewal of ecosystems and institutions. Columbia University Press, New York, 593 ppGoogle Scholar
  24. Hammerson GA (1994). Beaver (Castor canadensis): ecosystem alterations, management, and monitoring. Natural Areas Journal 14:44–57Google Scholar
  25. Haney A, Power RL (1996). Adaptive management for sound ecosystem management. Environmental Management 20:879–886CrossRefGoogle Scholar
  26. Holling CS (ed) (1978). Adaptive environmental assessment and management. John Wiley & Sons, New York, 377 ppGoogle Scholar
  27. Houston AE, Pelton MR, Henry R (1995). Beaver immigration into a control area. Southern Journal of Applied Forestry 19:127–130Google Scholar
  28. Jenkins SH, Busher PE (1979). Castor canadensis. Mammalian Species 120:1–8CrossRefGoogle Scholar
  29. Kindschy RR (1985). Response of red willow to beaver use in southeastern Oregon. Journal of Wildlife Management 49:26–28Google Scholar
  30. Kindschy RR (1989). Regrowth of willow following simulated beaver cutting. Wildlife Society Bulletin 17:290–294Google Scholar
  31. Ladson T, Argent R (2002). Adaptive management of environmental flows: lessons for the Murray-Darling Basin from three large North American Rivers. Australian Journal of Water Resources 5:89–102Google Scholar
  32. Lesica P, Miles S (2004). Beavers indirectly enhance the growth of Russian olive and tamarisk along eastern Montana rivers. Western North American Naturalist 64:93–100Google Scholar
  33. McGinley MA, Whitham TG (1985). Central place foraging by beavers (Castor canadensis): a test of foraging predictions and the impact of selective feeding on the growth form of cottonwoods (Populus fremontii). Oecologia 66:558–562CrossRefGoogle Scholar
  34. McKinstry MC, Caffrey P, Anderson SH (2001). The importance of beaver to wetland habitats and waterfowl in Wyoming. Journal of the American Water Resources Association 37:1571–1578Google Scholar
  35. Meffe GK, Nielsen LA, Knight RL, Schenborn DA (2002). Ecosystem management: adaptive, community-based conservation. Island Press, Washington, DC, 313 ppGoogle Scholar
  36. Monroe J, Wagner WD, Carr J, Smith F (1992). Multi-Species Habitat Conservation Plan for Southwestern Riverside County, California. Metropolitan Water District of Southern California and Riverside County Habitat Conservation Agency, Los Angeles and Riverside, CaliforniaGoogle Scholar
  37. Müller -Schwarze D, Sun L (2003). The beaver: natural history of a wetlands engineer. Cornell University Press, Ithaca, NY, 190 ppGoogle Scholar
  38. Myers JH, Simberloff D, Kuris AM, Carey JR (2000). Eradication revisited: dealing with exotic species. Trends in Ecology & Evolution 15:316–320CrossRefGoogle Scholar
  39. Naiman RJ, Johnston CA, Kelley JC (1988). Alteration of North American streams by beaver. BioScience 38:753–762CrossRefGoogle Scholar
  40. O’Connell M (1999). San Pedro beaver swims a muddy lap. The Arizona Daily Star, March 4Google Scholar
  41. Olson R, Hubert WA (1994). Beaver: water resources and riparian habitat manager. University of Wyoming, Laramie, 48 ppGoogle Scholar
  42. Parker M (1986). Beaver, water quality, and riparian systems. In Wyoming’s water doesn’t wait while we debate: proceedings of Wyoming Water 1986 and Streamside Zone Conference. Wyoming Water Research Center and University of Wyoming, Laramie pp 88–94Google Scholar
  43. Pullin AS, Knight TM (2003). Support for decision making in conservation practice: an evidence-based approach. Journal for Nature Conservation 11:83–90CrossRefGoogle Scholar
  44. Pullin AS, Knight TM, Stone DA, Charman K (2004). Do conservation managers use scientific evidence to support their decision-making? Biological Conservation 119:245–252CrossRefGoogle Scholar
  45. Reserve Management Committee (Southwestern Riverside County Multi-Species Reserve) (1998) Resolution 80: December 10, 1998, Control of Beavers East of Lake SkinnerGoogle Scholar
  46. Roelle JE, Gladwin DN (1999). Establishment of woody riparian species from natural seedfall at a former gravel pit. Restoration Ecology 7:183–192CrossRefGoogle Scholar
  47. Rosell F, Parker H (1996). The beaver’s (Castor spp.) role in forest ecology: a key species returns. Fauna 49:192–211Google Scholar
  48. Sala A, Smith SD, Devitt DA (1996). Water use by Tamarix ramosissima and associated phreatophytes in a Mojave Desert floodplain. Ecological Applications 6:888–898CrossRefGoogle Scholar
  49. Schnexnayder CJ (2001). Ruling a win for wildlife organization. The Press-Enterprise [Riverside, California], August 7, B1Google Scholar
  50. Schreiber ESG, Bearlin AR, Nicol SJ, Todd CR (2004). Adaptive management: a synthesis of current understanding and effective application. Ecological Management & Restoration 5:177–182CrossRefGoogle Scholar
  51. Smallwood KS, Beyea J, Morrison ML (1999). Using the best scientific data for endangered species conservation. Environmental Management 24:421–435CrossRefGoogle Scholar
  52. Smith SD, Devitt DA, Sala A, Cleverly JR, Busch DE (1998). Water relations of riparian plants from warm desert regions. Wetlands 18:687–696CrossRefGoogle Scholar
  53. Tappe DT (1942). The status of beavers in California. State of California Department of Natural Resources Division of Fish and Game. Game Bulletin 3:1–59Google Scholar
  54. Vandersande MW, Glenn EP, Walworth JL (2001). Tolerance of five riparian plants from the lower Colorado River to salinity drought and inundation. Journal of Arid Environments 49:147–159CrossRefGoogle Scholar
  55. Vitousek PM (1986). Biological invasions and ecosystem properties: can species make a difference? In: Mooney HA, Drake JA (eds) Ecology of biological invasions of North America and Hawaii. Springer Verlag, New York, pp 163–176Google Scholar
  56. Walters CJ (1986). Adaptive management of renewable resources. MacMillan Press, New York, 374 ppGoogle Scholar
  57. Weiss SB, (1999). Cars, cows, and checkerspot butterflies: nitrogen deposition and management of nutrient-poor grasslands for a threatened species. Conservation Biology 13:1476–1486CrossRefGoogle Scholar
  58. Wright JP, Jones CG, Flecker AS (2002). An ecosystem engineer, the beaver, increases species richness at the landscape scale. Oecologia 132:96–101CrossRefGoogle Scholar
  59. Zavaleta E (2000). The economic value of controlling an invasive shrub. Ambio 29:462–467CrossRefGoogle Scholar

Copyright information

© Springer Science+Business Media, Inc. 2007

Authors and Affiliations

  • Travis Longcore
    • 1
  • Catherine Rich
    • 1
  • Dietland Müller-Schwarze
    • 2
  1. 1.The Urban Wildlands GroupLos AngelesUSA
  2. 2.State University of New YorkCollege of Environmental Science and ForestrySyracuseUSA

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