Characterizing Contemporary Land Use/Cover Change on Isabela Island, Galápagos

Chapter
Part of the Social and Ecological Interactions in the Galapagos Islands book series (SESGI, volume 1)

Abstract

This study evaluates land use/cover change in southern Isabela Island, Galapagos, between 2004 and 2010. Spatial and temporal patterns of land use/cover change in the highland community of Santo Tomas and the adjacent Galapagos National Park (GNP) were quantified using remotely sensed data, an object-based classification algorithm, and post-classification change detection. Information derived from population censuses and interviews with local residents were leveraged to contextualize the land use/cover results. Between 2004 and 2010, agricultural land use and native vegetation cover declined across the study area by 28 %, primarily due to the invasion of guava (Psidium guajava) and conversion to forest and shrub. Guava was the most dominant land cover, and its extent increased by nearly 45 % in the GNP and just over 2 % in Santo Tomas. The population of Santo Tomas declined significantly in the same period, and the proportion of landowners participating in off-farm activities increased. The results of this study indicate that ongoing processes of declining agricultural production and land abandonment, coupled with the spread of invasive plants, are transforming the highlands. The maps and results presented in this study will contribute to an improved understanding of landscape dynamics in the region as reliable and current land use/cover data for the Galapagos Islands are lacking.

Keywords

Migration Transportation Income Expense Convolution 

Notes

Acknowledgments

This work was funded in part by an NSF IGERT grant (DGE-0333193) to the Carolina Population Center at the University of North Carolina at Chapel Hill. Support for this research was provided by the Center for Galápagos Studies and the Department of Geography at the University of North Carolina at Chapel Hill, the Galápagos National Park Service, and the people of Isabela Island. The comments of an anonymous reviewer are also appreciated.

References

  1. Alo CA, Pontius RG Jr (2008) Identifying systematic land-cover transitions using remote sensing and GIS: the fate of forests inside and outside protected areas of Southwestern Ghana. Environ Plann B 35:280–295CrossRefGoogle Scholar
  2. Benz UC, Hofmann P, Willhauck G, Lingenfelder I, Heynen M (2004) Multi-resolution, object-oriented fuzzy analysis of remote sensing data for GIS-ready information. ISPRS J Photogramm 58:239–258CrossRefGoogle Scholar
  3. Blaschke T, Lang S, Lorup E, Stobl J, Zeil P (2000) Object-oriented image processing in an integrated GIS/remote sensing environment and perspectives for environmental applications. In: Cremers A, Greve K (eds) Environmental information for planning, politics and the public. Verlag, MarburgGoogle Scholar
  4. Borja RN, Perez J (2000) Parque nacional Galápagos. dinamicas migratorias y sus efectos en el uso de la recursos naturales. Fundacion Natura and The Nature Conservancy, QuitoGoogle Scholar
  5. Brandt JJS, Townsend PA (2006) Land use—land cover conversion, regeneration and degradation in the high elevation Bolivian Andes. Landsc Ecol 21:607–623CrossRefGoogle Scholar
  6. Cléder E, Grenier C (2010) Taxis in Santa Cruz: uncontrolled mobilization. Galápagos report 2009–2010. CDF, GNP, CGG, Puerto Ayora, GalápagosGoogle Scholar
  7. Collins A, Bush MB (2011) An analysis of modern pollen representation and climatic conditions on the Galápagos Islands. Holocene 21:237–250CrossRefGoogle Scholar
  8. Foody GM (2002) Status of land cover classification accuracy assessment. Remote Sens Environ 80:185–201CrossRefGoogle Scholar
  9. Froyd C, Lee J, Anderson A, Haberle S, Gasson P, Willis K (2010) Historic fuel wood use in the Galápagos Islands: identification of charred remains. Veg Hist Archaeobot 19:207–217CrossRefGoogle Scholar
  10. Gardener MR, Grenier C (2011) Linking livelihoods and conservation: challenges facing the Galápagos Islands. In: Baldacchino G, Niles D (eds) Island futures: conservation and development across the Asia-Pacific region. Springer, New YorkGoogle Scholar
  11. Gardener MR, Atkinson R, Rentería JL (2010) Eradications and people: lessons from the plant eradication program in Galápagos. Restor Ecol 18:20–29CrossRefGoogle Scholar
  12. Gonzalez JA, Montes C, Rodriguez J, Tapia W (2008) Rethinking the Galápagos Islands as a complex social–ecological system: implications for conservation and management. Ecol Soc 13(2):13Google Scholar
  13. Guézou A, Trueman M, Buddenhagen CE, Chamorro S, Guerrero AM, Pozo P, Atkinson R (2010) An extensive alien plant inventory from the inhabited areas of Galápagos. PLoS One 5(4):e10276CrossRefGoogle Scholar
  14. Hay GJ, Castilla G (2008) Geographic object-based image analysis (GEOBIA): a new name for a new discipline. In: Blaschke T, Lang S, Hay GJ (eds) Object-based image analysis: spatial concepts for knowledge-driven remote sensing applications. Springer, BerlinGoogle Scholar
  15. Henderson S, Dawson TP (2009) Alien invasions from space observations: detecting feral goat impacts on Isla Isabela. Galápagos Islands with the AVHRR. Int J Remote Sens 30:423–433CrossRefGoogle Scholar
  16. Huang C, Davis LS, Townshend JRG (2002) An assessment of support vector machines for land cover classification. Int J Remote Sens 23:725–749CrossRefGoogle Scholar
  17. Jäger H, Kowarik I, Tye A (2009) Destruction without extinction: long-term impacts of an invasive tree species on Galápagos highland vegetation. J Ecol 97:1252–1263CrossRefGoogle Scholar
  18. Kerr S, Cardenas S, Hendy J (2004) Migration and the environment in the Galápagos: an analysis of economic and policy incentives driving migration, potential impacts from migration control, and potential policies to reduce migration pressure. Motu Economic and Public Policy Research, WellingtonGoogle Scholar
  19. Lang S (2008) Object-based image analysis for remote sensing applications: modeling reality—dealing with complexity. In: Blaschke T, Lang S, Hay GJ (eds) Object-based image analysis: spatial concepts for knowledge-driven remote sensing applications. Springer, BerlinGoogle Scholar
  20. MacFarland C, Cifuentes M (1996) Case study: Galápagos, Ecuador. In: Dompka V (ed) Human population, biodiversity and protected areas: science and policy issues. Washington, DC, American Association for the Advancement of ScienceGoogle Scholar
  21. Meinel G, Neubert M (2004) A comparison of segmentation programs for high resolution remote sensing data. Int Arch ISPRS 35:1097–1105Google Scholar
  22. Ministerio de Agricultura y Ganaderia Programa Nacional de Regionalizacion Agraria (PRONAREG), Institut Francais de Recherche Scientifique Pour le Developpement en Cooperation (ORSTOM), Instituto Nacional Galápagos (INGALA) (1987) Islas Galápagos: Mapa de Formaciones Vegetales (1:100000)Google Scholar
  23. Rodriguez J (1989) Una agricultura exigua en un espacio rural singular. Trama 49:13–15Google Scholar
  24. The Nature Conservancy (TNC), Centro de Levantamientos Integrados de Recursos Naturales por Sensores Remotos (CLIRSEN) (2006) Cartografía Galápagos 2006: conservación en otra dimensión (1:50,000)Google Scholar
  25. Trueman M, Hannah L, d’Ozouville N (2010) Terrestrial ecosystems in Galápagos: potential responses to climate change. In: Ona IL, Di Carlo G (eds) Climate change vulnerability assessment of the Galápagos Islands. Quito, World Wildlife Fund and Conservation InternationalGoogle Scholar
  26. Tye A, Soria M, Gardener M (2002) A strategy for Galápagos weeds. In: Veitch CR, Clout MN (eds) Turning the tide: the eradication of invasive species (proceedings of the International Conference of Eradication of Island Invasives). Aukland, New Zealand, IUCN Species Survival CommissionGoogle Scholar
  27. Vilema H, Carrion C, Gordillo P (2003) Plan Estrategico del Canton Isabela. Gobierno Municipal de Isabela, Puerto VillamilGoogle Scholar
  28. Villa A, Segarra P (2010) El cambio histórico del uso del suelo y cobertura vegetal en el área rural de Santa Cruz y San Cristóbal. Galápagos report 2009–2010. CDF, GNP, CGG, Puerto Ayora, GalápagosGoogle Scholar
  29. Walsh SJ, McCleary AL, Mena CF, Shao Y, Tuttle JP, González A, Atkinson R (2008) QuickBird and Hyperion data analysis of an invasive plant species in the Galápagos Islands of Ecuador: implications for control and land use management. Remote Sens Environ 112:1927–1941CrossRefGoogle Scholar
  30. Walsh SJ, McCleary AL, Heumann BW, Brewington L, Raczkowski EJ, Mena CF (2010) Community expansion and infrastructure development: implications for human health and environmental quality in the Galápagos Islands of Ecuador. J Lat Am Geogr 9:137–159CrossRefGoogle Scholar
  31. Watson J, Trueman M, Tufet M, Henderson S, Atkinson R (2009) Mapping terrestrial anthropogenic degradation on the inhabited islands of the Galápagos Archipelago. Oryx 44:79–82CrossRefGoogle Scholar
  32. Wiggins IL, Porter DM (1971) Flora of the Galápagos Islands. Stanford University Press, Stanford, CAGoogle Scholar

Copyright information

© Springer Science+Business Media, LLC 2013

Authors and Affiliations

  1. 1.Department of Geography, Center for Galápagos StudiesUniversity of North Carolina at Chapel HillChapel HillUSA

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