The risk of rodent introductions from shipwrecks to seabirds on Aleutian and Bering Sea islands

  • Martin Renner
  • Eric Nelson
  • Jordan Watson
  • Alan Haynie
  • Aaron Poe
  • Martin Robards
  • Steve C. Hess
Original Paper

Abstract

Accidental introductions of rodents present one of the greatest threats to indigenous island biota, especially seabirds. On uninhabited remote islands, such introductions are likely to come from shipwrecks. Here we use a comprehensive database of shipwrecks in Western Alaska to model the frequency of shipwrecks per Aleutian and Bering Sea island, taken as a proxy for the threat of rodent introductions, using physical variables, and the intensity of nearby fishing traffic and activity as predictors. Using data spanning from 1950 to 2013, we found that shipwrecks were particularly common in the 1980s to early 2000s, with a major peak in wrecks during the late 1980s. Amount of fishing activity within 5 km of an island was the strongest predictor of shipwrecks, followed by the strength of tidal currents and density of large-vessel traffic. Islands with the highest frequency of shipwrecks are all in the eastern Aleutians, including Unimak, Unalaska, and Akun Islands. By contrast, the largest seabird colonies are in the western Aleutian and Pribilof Islands, including Buldir, Kiska, and Saint George islands. Multiplying the frequency of a shipwreck by the number of seabirds breeding per island provides a measure of risk. The risk of rodent introductions from shipwrecks to seabirds was then greatest for Saint George (Bering Sea), Buldir (Western Aleutians) and Saint Matthew islands (Bering Sea). Keeping these high-risk islands rodent free would maintain their high a conservation value. Most islands with a high predicted frequency of shipwrecks already have established rodent populations and therefore few remaining seabirds. Of those islands with established rodent populations, Attu and Kiska Islands would make suitable targets for eradication, given their relatively low expected frequency of shipwrecks for their size. Further improvements in rat prevention on vessels and shipping safety would benefit the economy, human health and safety, and to the long-term conservation of island ecosystems.

Keywords

Invasive species Island conservation Shipping traffic 

Notes

Acknowledgements

We would like to acknowledge the help of numerous people that made this work possible. A. Sowls has been a pioneer in raising awareness and introducing measures for preventing rodent introductions to Alaskan islands. We’d like to thank S. Ebbert for sharing his unparalleled knowledge of invasive species in the Aleutian Archipelago. Shannon Fitzgerald helped with providing and interpreting the fisheries observer data. We are most grateful to D. Burn for his help with acquiring data sets. J. Williams, N. Rojek, M. Romano and H. Renner helped with many long discussions, suggestions, and sharing their intimate knowledge of the Alaska Maritime NWR. K. Kuletz has been instrumental, getting this project started and raising necessary funds. Comments by S. Kendall and M. Smith and two anonymous reviewers improved this manuscript. Thanks to NMFS Science and Technology’s economics program and the spatial economics toolbox for fisheries (FishSET) project for supporting JW’s work on the project. The Science Support Partnership of USGS and the US Fish and Wildlife Service, the USGS Invasive Species Program, and the Aleutian and Bering Sea Islands Landscape Conservation Cooperative supported this work. Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.

References

  1. Bailey EP, Kaiser GW (1990) Impacts of introduced predators on nesting seabirds in the northeast Pacific. In: Vermeer K, Briggs KT, Morgan K, Siegel-Causey D (eds) The Status, ecology, and conservation of marine birds of the North Pacific. Canadian Wildlife Service Special Publication, Ottawa, pp 218–226Google Scholar
  2. Bodkin JL, Ballachey BE, Coletti HA, Esslinger G, Kloecker KE, Rice SD, Reed JA, Monson DH (2012) Long-term effects of the ‘Exxon Valdez’ oil spill: sea otter foraging in the intertidal as a pathway of exposure to lingering oil. Mar Ecol Prog Ser 447:273–287CrossRefGoogle Scholar
  3. Borell B (2011) Where eagles die. Nature.  https://doi.org/10.1038/news.2011.24 Google Scholar
  4. Breiman L (2001) Random forests. Mach Learn 45(1):5–32CrossRefGoogle Scholar
  5. Bremner A, Park K (2007) Public attitudes to the management of invasive non-native species in Scotland. Biol Cons 139(3):306–314CrossRefGoogle Scholar
  6. Buckelew S, Byrd G, Howald G, MacLean S, Sheppard J (2011) Preliminary ecosystem response following invasive Norway rat eradication on Rat Island, Aleutian Islands, Alaska. In: Veitch CR, Clout MN, Towns DR (eds) Island invasives: eradication and management. IUCN, Gland, pp 275–279Google Scholar
  7. Byrd GV, Renner HM, Renner M (2005) Distribution patterns and population trends of breeding seabirds in the Aleutian Islands. Fish Oceanogr 14(Suppl. 1):139–159CrossRefGoogle Scholar
  8. Clavero M, García-Berthou E (2005) Invasive species are a leading cause of animal extinctions. Trends Ecol Evol 20(3):110CrossRefPubMedGoogle Scholar
  9. Croll DA, Maron J, Estes JA, Danner E, Byrd GV (2005) Introduced predators transform subarctic islands from grassland to tundra. Science 307:1959–1961CrossRefPubMedGoogle Scholar
  10. Cutler DR, Edwards TC Jr, Beard KH, Cutler A, Hess KT, Gibson J, Lawler JJ (2007) Random forests for classification in ecology. Ecology 88(11):2783–2792CrossRefPubMedGoogle Scholar
  11. Ebbert SE, Byrd GV (2002) Eradications of invasive species to restore natural biological diversity on Alaska Maritime National Wildlife Refuge. In: Veitch CR, Clout MN (eds) Turning the tide: the eradication of invasive species. IUCN Invasive Species Specialist Group, Gland, pp 102–109Google Scholar
  12. Ebbert SM, Sowls AL, Byrd GV (2007) Alaska’s rat spill response program. In: Witmer GW, Pitt WC, Fagerstone KA (eds) Managing vertebrate invasive species: proceedings of an international symposium. USDA/APHIS/WS, Fort CollinsGoogle Scholar
  13. Egbert G, Erofeeva SY (2002) Efficient inverse modeling of barotropic ocean tides. J Atmos Ocean Technol 19(2):183–204CrossRefGoogle Scholar
  14. Gotthardt T, Kenney L, Greenstein C, Reimer J (2016) A synthesis and vulnerability assessment of terrestrial invasive species in the Aleutian and Bering sea islands. Technical report, Prepared for the Aleutian and Bering Sea Island LCC. Alaska Center for Conservation Science, University of Alaska Anchorage, Anchorage, AKGoogle Scholar
  15. Jones HP, Tershy BR, Zavaleta ES, Croll DA, Keitt BS, Finkelstein ME, Howald GR (2008) Severity of the effects of invasive rats on seabirds: a global review. Conserv Biol 22(1):16–26CrossRefPubMedGoogle Scholar
  16. Kepler CB (1967) Polynesian rat predation on nesting laysan albatrosses and other Pacific seabirds. Auk 84(3):426–430CrossRefGoogle Scholar
  17. King WB (1980) Ecological basis of extinction in birds. Acta Congr Int Ornithol 2:905–911Google Scholar
  18. Liaw A, Wiener M (2002) Classification and regression by randomForest. R News 2:18–22Google Scholar
  19. Major HL, Bond AL, Jones IL, Eggleston CJ (2013) The stability of a seabird population affected by an introduced predator. Avian Conserv Ecol 8:2.  https://doi.org/10.5751/ACE-00564-080102 Google Scholar
  20. Mandryk CA, Josenhans H, Fedje DW, Mathewes RW (2001) Late Quaternary paleoenvironments of Northwestern North America: implications for inland versus coastal migration routes. Quat Sci Rev 20(1):301–314CrossRefGoogle Scholar
  21. Marmion M, Luoto M, Heikkinen RK, Thuiller W (2009) The performance of state-of-the-art modelling techniques depends on geographical distribution of species. Ecol Model 220:3512–3520CrossRefGoogle Scholar
  22. Martin JL, Thibault JC, Bretagnolle V (2000) Black rats, island characteristics, and colonial nesting birds in the Mediterranean: consequences of an ancient introduction. Conserv Biol 14(5):1452–1466CrossRefGoogle Scholar
  23. McClelland PJ (2011) Campbell island–pushing the boundaries of rat eradications. In: Clout MN, Towns DR (eds) Island invasives: eradication and management. IUCN, Gland, pp 204–207Google Scholar
  24. McCreless EE, Huff DD, Croll DA, Tershy BR, Spatz DR, Holmes ND, Butchart SHM, Wilcox C (2016) Past and estimated future impact of invasive alien mammals on insular threatened vertebrate populations. Nat Commun 7:12488.  https://doi.org/10.1038/ncomms12488 CrossRefPubMedPubMedCentralGoogle Scholar
  25. Michel RK, Bley DC, Leschine TM, Marcus HS, McCafferty D, Mosleh A, North RC, Williams M (2009) Risk of vessel accidents and spills in the aleutian islands: designing a comprehensive risk assessment—special report 293. The National Academies Press and Transportation Research Board, Washington, DC. http://www.nap.edu/openbook.php?record_id=12443
  26. Nathan HW, Clout MN, MacKay JW, Murphy EC, Russell JC (2015) Experimental island invasion of house mice. Popul Ecol 57(2):363–371CrossRefGoogle Scholar
  27. Oppel S, Beaven BM, Bolton M, Vickery J, Bodey TW (2011) Eradication of invasive mammals on islands inhabited by humans and domestic animals. Conserv Biol 25(2):232–240PubMedGoogle Scholar
  28. R Development Core Team (2016) R: a language and environment for statistical computing. R Foundation for Statistical Computing, ViennaGoogle Scholar
  29. Renner M, Kuletz KJ (2015) A spatial-seasonal analysis of the oiling risk from shipping traffic to seabirds in the Aleutian Archipelago. Mar Pollut Bull 101:127–136CrossRefPubMedGoogle Scholar
  30. Rice SD (2009) Persistence, toxicity, and long-term environmental impact of the Exxon Valdez oil spill. Univ St Thomas Law J 7(1):55Google Scholar
  31. Robards MD, Silber G, Adams J, Arroyo J, Lorenzini D, Schwehr K, Amos J (2016) Conservation science and policy applications of the marine vessel Automatic Identification System (AIS)—a review. Bull Mar Sci 92(1):75–103CrossRefGoogle Scholar
  32. Russell JC, Clout MN (2005) Rodent incursions on New Zealand islands. In: Parkes J, Statham M, Edwards G (eds) Proceedings of the 13th Australiasian vertebrate pest conference, vol 45. Landcare Research, Lincoln, pp 324–330Google Scholar
  33. Russell JC, Towns DR, Anderson SH, Clout MN (2005) Intercepting the first rat ashore. Nature 437(7062):1107CrossRefPubMedGoogle Scholar
  34. Russell JC, Beaven BM, MacKay JWB, Towns DR, Clout MN (2008) Testing island biosecurity systems for invasive rats. Wildl Res 35(3):215–221CrossRefGoogle Scholar
  35. Salmon T (2010) The rat island rat eradication project: a critical evaluation of nontarget mortality. Technical report, The Ornithological Council, Bethesda, MDGoogle Scholar
  36. Sowls AL (2000) Protecting Alaska’s islands from rodent introductions. Pac Seab 21(1):48Google Scholar
  37. Stephensen SW, Irons DB (2003) Comparison of colonial breeding seabirds in the eastern Bering Sea and Gulf of Alaska. Mar Ornithol 31:167–173Google Scholar
  38. Stolzenburg W (2012) Rat Island: predators in paradise and the world’s greatest wildlife rescue. Bloomsbury, New YorkGoogle Scholar
  39. Tabak MA, Poncet S, Passfield K, Carling MD, Del Rio CM (2015) The relationship between distance and genetic similarity among invasive rat populations in the Falkland Islands. Conserv Genet 16(1):125–135CrossRefGoogle Scholar
  40. Towns DR, Atkinson IA, Daugherty CH (2006) Have the harmful effects of introduced rats on islands been exaggerated? Biol Invasions 8(4):863–891CrossRefGoogle Scholar
  41. Veitch C, Clout M, Towns D (2011) Island invasives: eradication and management. IUCN, GlandGoogle Scholar
  42. Wanless RM, Angel A, Cuthbert RJ, Hilton GM, Ryan PG (2007) Can predation by invasive mice drive seabird extinctions? Biol Lett 3(3):241–244CrossRefPubMedPubMedCentralGoogle Scholar
  43. Watson JT, Haynie AC (2016) Using vessel monitoring system data to identify and characterize trips made by fishing vessels in the United States North Pacific. PLoS ONE 11(10):e0165173CrossRefPubMedPubMedCentralGoogle Scholar
  44. Weksler M, Lanier HC, Olson LE (2010) Eastern Beringian biogeography: historical and spatial genetic structure of singing voles in Alaska. J Biogeogr 37(8):1414–1431Google Scholar
  45. Wessel P, Smith W (1996) A global self-consistent, hierarchical, high- resolution shoreline database. J Geophys Res 101:8741–8743CrossRefGoogle Scholar

Copyright information

© Springer International Publishing AG, part of Springer Nature 2018

Authors and Affiliations

  • Martin Renner
    • 1
  • Eric Nelson
    • 2
  • Jordan Watson
    • 3
  • Alan Haynie
    • 4
  • Aaron Poe
    • 5
  • Martin Robards
    • 6
  • Steve C. Hess
    • 7
  1. 1.Tern Again ConsultingHomerUSA
  2. 2.Alaska Maritime NWRHomerUSA
  3. 3.NOAA Fisheries AFSCJuneauUSA
  4. 4.NOAA Fisheries AFSCSeattleUSA
  5. 5.Aleutian and Bering Sea Islands LCCAnchorageUSA
  6. 6.Wildlife Conservation SocietyFairbanksUSA
  7. 7.US Geological SurveyPacific Island Ecosystems Research CenterHawai‘i National ParkUSA

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