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Publications

 Peer-reviewed scientific publications:

Pellikka, P.K.E., B.J.F. Clark, A. Gonsamo Gosa, N. Himberg, P. Hurskainen, E. E. Maeda, J. Mwang’ombe, L.M.A. Omoro & M. Siljander, 2013. Agricultural expansion and its consequences in the Taita Hills, Kenya. Developments in Earth Surface Processes 16: 165-179. P. Paron, D. Olago and C.T. Omuto (eds): Kenya: a natural outlook – geo-environmental resources and hazards, Elsevier, Amsterdam, The Netherlands.

Enroth, J., P. Nyqvist, I. Malombe, P. Pellikka & J. Rikkinen, 2013. Additions to the moss flora of the Taita Hills and Mount Kasigau, Kenya. Polish Journal of Botany 58(2), 495-510.

Spanhove. T, T. Callens, C.A. Hallmann, P. Pellikka & L. Lens, 2013. Nest predation in Afrotropical forest fragmenrts shaped by inverse edge effects, timing of nest initiation and vegetation structure. Journal of Ornithology. DOI 10.1007/s10336-013-1021-9.

Omoro, L.M.A, M. Starr & P. K.E. Pellikka, 2013. Tree biomass and soil carbon stocks in indigenous forests in comparison to plantations of exotic species in the Taita Hills of Kenya. Silva Fennica 47:2.

­­­­­­Pfeifer, M., A. Gonsamo, M. Disney, P. Pellikka & R. Marchant, 2012. Leaf area index for biomes of the Eastern Arc Mountains: Landsat and SPOT observations along precipitation and altitude gradients. Remote Sensing of Environment 118, 103-115.

Kaasalainen, U., D.B. Fewer, J. Jokela, M. Wahlsten, K. Sivonen & J. Rikkinen, 2012. Cyanobacteria produce a high variety of hepatotoxic peptides in lichen symbiosis. PNAS – Proceedings of the National Academy of Science of the United States. www.pnas.org/cgi/doi/10.1073/pnas.1200279109.

Aben, J., F. Adriasen, K.W. Thijs, P. Pellikka, M. Sijander, L. Lens & E. Matthysen, 2012. Effects of matrix composition and configuration on forest bird movements in a fragmented Afromontane biodiversity hotspot. Animal Conservation 15: 658-668.

Clark, B., J. Suomalainen & P. Pellikka, 2011. The selection of appropriate pseudoinvariant ground targets for use in empirical line spectral calibration of SPOT satellite imagery. ISPRS Journal of Photogrammetry & Remote Sensing 66 (4), 429-445.

Platts, P.J., J.C. Lovett, P.K.E. Pellikka, N. Burgess, R.D. Swetnam, A.R. Marshall, C.J. McClean & R. Marchant, 2011. Delimiting tropical mountain ecoregions for conservation. Environmental Conservation 38 (3): 312–324.

Siljander, M., B. Clark & P. Pellikka, 2011. A predictive modelling technique for human population distribution and abundance estimation using remote sensing and geospatial data in rural mountainous area in Kenya. International Journal of Remote Sensing 32(21): 5997-6023.

Erdogan, E.H., P. Pellikka, B. Clark, 2011. Impact of land cover change on soil loss in the Taita Hills, Kenya between 1987 and 2003. International Journal of Remote Sensing 32 (21): 5919-5945.

Clark, B., J. Suomalainen & P. Pellikka. An historical empirical line method for the retrieval of surface reflectance factor from multi-temporal SPOT HRV, HRVIR and HRG multispectral satellite imagery. International Journal of Applied Earth Observation and Geoinformation. 13, 292-307.

Maeda, E.E., P. Pellikka, B. Clark & M. Siljander, 2011. Prospective changes in irrigation water requirements caused by agricultural expansion and climate changes in the eastern arc mountains of Kenya. Journal of Environmental Management 92, 982-993. (pdf)

Maeda, E.J., D. Wiberg & P.K.E. Pellikka, 2011. Estimating reference evapotranspiration using remote sensing and empirical models in a region with limited ground data availability in Kenya. Applied Geography 31, 251-258. (pdf)

Omoro, L.M.A., R. Laiho, M. Starr & P.K.E. Pellikka, 2011. Relationships between native tree species and soil properties in the indigenous forest fragments of the Eastern Arc Mountains of the Taita Hills, Kenya. Forestry Studies in China 13(3): 198–210.

Maeda, E.J., D. Wiberg & P.K.E. Pellikka, 2011. Estimating reference evapotranspiration using remote sensing and empirical models in a region with limited ground data availability in Kenya. Applied Geography 31, 251-258.

Maeda, E.E., P. Pellikka, B. Clark & M. Siljander, 2011. Prospective changes in irrigation water requirements caused by agricultural expansion and climate changes in the eastern arc mountains of Kenya. Journal of Environmental Management 92, 982-993.

Callens, T., Galbusera, P., Matthysen, E., Durand E.Y., Githiru, M., Huyghe, J.R. & Lens, L. 2011. Genetic signature of population fragmentation varies with mobility in seven bird species of a fragmented Kenyan cloud forest. Molecular Ecology 20: 1829–1844.

Lehouck, V., Spanhove, T. & Lens, L. 2011. Avian fruit ingestion differentially facilitates seed germination of four fleshy-fruited plant species of an Afrotropical forest. Plant Ecology and Evolution 144: 96–100.

Aerts, R., Lehouck, V., Thijs, K.W., Mbuthia, W.K., Beentje, H., Bytebier, B., Matthysen, E., Lens, L., Gulinck, H. & Muys, B. 2011. Woody plant communities of isolated Afromontane cloud forests in Taita Hills, Kenya. Plant Ecology 212: 639-649.

Githiru, M., Lens, L., Adriaensen, F., Mwang’ombe, J. & Matthysen, E. 2011. Using science to guide conservation: from landscape modelling to increased connectivity in the Taita Hills, SE Kenya. Journal for Nature Conservation 19: 263– 268.

Clark, B., J. Suomalainen & P. Pellikka, 2010. A comparison of methods for the retrieval of surface reflectance factor from multi-temporal SPOT HRV, HRVIR and HRG multispectral satellite imagery. Canadian Journal of Remote Sensing, 36, 397–411. (pdf)

Gonsamo, A., J-M.N. Walter & P. Pellikka, 2010. Sampling gap fraction and size for estimating leaf area and clumping indices using hemispherical photography. Canadian Journal of Forest Research 40, 588-1603. (pdf)

Maeda, E.E., B. Clark, P. Pellikka & M. Siljander, 2010. Modelling agricultural expansion in Kenya’s eastern arc mountains biodiversity hotspot. Agricultural Systems 103, 609-620. (pdf)

Maeda, E.E., P. Pellikka & B. Clark, 2010. Monte Carlo Simulation and remote sensing applied to agricultural survey sampling strategy in Taita Hills, Kenya. African Journal of Agricultural Research 5, 1647-1654. (pdf)

Maeda, E.E., P. Pellikka, M. Siljander & B. Clark, 2010. Potential impacts of agricultural expansion and climate change on soil erosion in the Eastern Arc Mountains of Kenya. Geomorphology 279-289. (pdf)

Omoro, L.M.A., P. Pellikka & P. Rogers, 2010. Tree species diversity, richness, and similarity between exotic and indigenous forests in the cloud forests of Eastern Arc Mountains, Taita Hills, Kenya. Journal of Forestry Research 21:3, 255-264. (pdf)

Platts, P.J., A. Ahrends, R.E. Gereau, C.J. McClean, J.C. Lovett, A.R. Marshall, P. Pellikka, M. Mulligan, E. Fanning, R. Marchant, 2010. Can distribution models help refine inventory-based estimates of conservation priority? A case study in the Eastern Arc forests of Tanzania and Kenya. Diversity and Distributions 16, 628-642. (pdf)

Clark, B.J.F. & P.K.E. Pellikka, 2009. Landscape analysis using multiscale segmentation and object orientated classification. In: Röder, A. & J. Hill (eds.) Recent Advances in Remote Sensing and Geoinformation Processing for Land Degradation Assessment. ISPRS book series in photogrammetry, remote sensing and spatial information sciences, Vol. 8. pp. 323-342, Taylor & Francis Group 2009, ISBBN: 978-0-415-39769-8.(pdf)

Gonsamo, A., & P. Pellikka, 2009. The computation of foliage clumping index using hemispherical photography. Agricultural and Forest Meteorology 149, 1781-1787. (pdf)

Himberg, N. L.M.A. Omoro, P. Pellikka & O. Luukkanen, 2009. The benefits and constraints of participation in forest management. The case of Taita Hills, Kenya. Fennia 187, 61-76. (pdf)

Pellikka, P., M. Lötjönen, M. Siljander & L. Lens, 2009. Airborne remote sensing of spatiotemporal change (1955-2004) in indigenous and exotic forest cover in the Taita Hills, Kenya. International Journal of Applied Earth Observation and Geoinformation 11(4):221-232. DOI: 10.1016/j.jag.2009.02.002 (pdf)

Lehouck, V., Spanhove, T., Vangestel C., Cordeiro N.J. & Lens, L. 2009. Does landscape structure affect resource tracking by avian frugivores in a fragmented Afrotropical forest? Ecography 32: 789-799.

Spanhove, T., Lehouck, V., Boets, P. & Lens, L. 2009. Forest fragmentation relaxes natural nest predation in an Afromontane forest. Animal Conservation 12: 267-275.

Spanhove, T. Lehouck, V. & Lens, L. 2009. Inverse edge effect on nest predation in a Kenyan forest fragment: an experimental case study. Bird Conservation International 19:367-378.

Spanhove, T., Lehouck, V. & Lens, L. 2009. Edge effects on avian nest predation: the quest for a conceptual framework. Animal Conservation 12: 284-286.

Lehouck, V., Spanhove, T, Demeter, S., Groot, N. & Lens, L. 2009. Complementary seed dispersal by three avian frugivores in a fragmented Afromontane forest. Journal of Vegetation Science 20: 1110-1120.

Gonsamo, A. & P. Pellikka, 2008. Methodology comparison for slope correction in canopy biophysical parameters estimation using hemispherical photography. Forest Ecology and Management 256:749-759. (pdf)

Other scientific publications:

Pellikka, P., 1989. Maaperäeroosio ja maaperän suojelu Keniassa. In: Kivikko­kangas-Sandgren, R. & S. Tuhkanen (eds.): Tähtäi­messä Kenia. Kehitys­maan­tie­teen yhdistyk­sen toimitteita 22, pp. 13-25, Depart­ment of Geography, University of Helsinki. (In English: Soil erosion and soil conservation in Kenya).

Pellikka, P., 1990. Taita Hillsin vuoristometsät – katoavatko ne lopullisesti? Maapallo 1990:1-2, pp. 3-12. (In English: The mountain forests of Taita Hills, SE-Kenya – do they disappear definitively ?)

Pellikka, P., 1990. Taita Hillsin metsät. In: Kivikkokangas- Sandgren, R., R. Paalanen & S. Tuhkanen (eds.): Taita Hills – kuivan savannin ympäröimät vehreät vuoret Kaakkois-Keniassa. Occasional Papers of the Finnish Association for Development Geography 24, pp. 13-26, Department of Geography, University of Helsinki. (In English: The forests of Taita Hills, SE-Kenya).

Pellikka, P., 1991. Land Use and its Classification Using a Multispectral SPOT XS Satellite Image in the Taita Hills, SE-Kenya. In: Kivikkokangas-Sandgren, R., S. Tuhkanen & J. Uotila (eds.): Land Use and Strategies for Survival in the Taita Hills, Taita-Taveta District, Southeastern Kenya. Occasional Papers of the Finnish Association for Development Geography 25, pp. 35-64, Department of Geography, University of Helsinki.

Pellikka, P., 2003. Ilmakuvilta tietoa maankäytön seurantaan. Positio 3/2003, 12-13. (In English: Application of aerial photographs on land use change detection).

Pellikka, P., 2003. Maankäytön muutosten suomalainen tutkimus etenee Keniassa. Terra 115:238-239. (In English: Investigating land use in Kenya).

Hurskainen, P. & P. Pellikka, 2004. Change detetection of informal settlements using multi-temporal aerial photographs – the case of Voi, SE-Kenya. Proceedings of the 5th AARSE conference (African Association of Remote Sensing of the Environment), 18-21 October, 2004, Nairobi, Kenya. CD-Publication, no page numbers. (pdf)

Niemelä, T. & P. Pellikka, 2004. Zonation and characteristics of the vegetation on Mt. Kenya. In: Pellikka, P., J. Ylhäisi & B. Clark (eds.): Taita Hills and Kenya, 2004 – seminar, reports and journal of a field excursion to Kenya. Expedition Reports of Department of Geography, University of Helsinki 40, 148 p., pp. 14-20. Department of Geography, University of Helsinki. (pdf)

Pellikka, P., B. Clark, P. Hurskainen, A. Keskinen, M. Lanne, K. Masalin, P. Nyman-Ghezelbash & T. Sirviö, 2004. Land use change monitoring applying geographic information systems in the Taita Hills. Proceedings of the 5th AARSE conference (African Association of Remote Sensing of the Environment), 18-21 October, 2004, Nairobi, Kenya. CD-Publication, no page numbers. (pdf)

Pellikka, P., J. Ylhäisi & B. Clark (eds.): Taita Hills and Kenya, 2004 – seminar, reports and journal of a field excursion to Kenya. Expedition Reports of Department of Geography, University of Helsinki 40, 148 p., pp. 14-20. Department of Geography, University of Helsinki.
Link to the report PDFs from (here)

Sirviö, T., A. Rebeiro-Hargrave & P. Pellikka, 2004. Geoinformation in gully erosion studies in the Taita Hills, SE-Kenya, preliminary results. Proceedings of the 5th AARSE conference (African Association of Remote Sensing of the Environment), 18-21 October, 2004, Nairobi, Kenya. CD-Publication, no page numbers. (pdf)

Clark, B.J.F. & P.K.E. Pellikka, 2005. The development of a land use change detection methodology for mapping the Taita Hills, South-East Kenya. Proceedings of the 31st International Symposium of Remote Sensing of the Environment, 20-24 June 2005, St. Petersburg, Russia. CD-Rom publication. (pdf)

Soini, E., 2005. Livelihood capital, strategies and outcomes in the Taita hills of Kenya. ICRAF Working Paper no. 8. Nairobi, Kenya: World Agroforestry Centre. (pdf)

Pellikka, P, 2005. Taita Hills – kuivan savannin ympäröimät vehreät vuoret Kaakkois-Keniassa. Turun yliopiston maantieteen laitoksen julkaisuja 168: 75-90. (English summary: Taita Hills – green mountains surrounded by savannah vegetation).
(pdf)

Pellikka, P.K.E., B.J.F. Clark, T. Sirviö & K. Masalin, 2005. Environmental change monitoring applying satellite and airborne remote sensing data in the Taita Hills, Kenya. Proc. of the Int. Conf. on Remote Sensing and Geoinformation Processing in the Assessment and Monitoring of Land Degradation and Desertification. 7-9 September, 2005, Trier, Germany. CD-Rom publication, no page numbers. (pdf)

Pellikka, P., 2006. Paikkatieto kehittyvissä maissa – pitäisikö tavoitteita tarkistaa? (In English: GIS in developing countries – what should we aim for?) Positio 4/2006, pp. 23-24.

Toivonen, T., J. Rikkinen & P. Pellikka (eds.), 2012. Landscapes and lichens of Taita Hills, Kenya. Expedition Reports of Department of Geography, University of Helsinki 50. 93 p. Department of Geography, University of Helsinki. ISSN 0786-2172. (pdf)

 

PhD Theses:

Toon Spanhove. 2012. Avian persistence in a severely fragmented Afrotropical cloud forest. University of Ghent, Belgium.

Loice Mildred Akinyi Omoro, 2012. Impacts of indigenous and exotic tree species on ecosystem services – Case study on the mountain cloud forests of Taita Hills, Kenya. Tropical Forestry Reports 41, Viikki Tropical Resources Institute, University of Helsinki. http://urn.fi/URN:ISBN:978-952-10-8449-2

Tom Callens, 2012. Genetic and demographic signatures of population fragmentation in a cooperative breeding bird from south-east Kenya.  University of Ghent, Belgium.    http://www.ecology.ugent.be/terec/pdf/PHD_callens_2012.pdf

Nina Himberg, 2011. Traditionally protected forests- justifications or hindrances to ethnodevelopment and participatory forestry in Taita Hills, Kenya. Department of Geosciences and Geography, University Print, Helsinki. http://urn.fi/URN:ISBN:978-952-10-7283-3

Eduardo Maeda, 2011. Agricultural expansion and climate change in the Taita Hills, Kenya: an assessment of potential environmental impacts. Department of Geosciences and Geography A7, University Print, Helsinki  https://helda.helsinki.fi/handle/10138/24585

Barnaby Clark, 2010. Enhanced processing of SPOT multispectral satellite imagery for environmental monitoring and modelling, Department of Geosciences and Geography A5, University Print, Helsinki.http://urn.fi/URN:ISBN:978-952-10-6306-0

Mika Siljander, 2010. Geospatial environmental data modelling applications using remote sensing, GIS and spatial statistics, Department of Geosciences and Geography A1, Yliopistopaino, Helsinki.http://urn.fi/URN:ISBN:978-952-10-6110-3

Alemu Gonsamo Gosa, 2009. Remote sensing of leaf area index: enhanced retrieval from close-range and remotely sensed optical observations, Helsingin yliopiston maantieteen laitoksen julkaisuja A 147, Hansaprint, Helsinki.http://urn.fi/URN:ISBN:978-952-10-5873-8

Valerie Lehouck, 2009. Frugivory and seed dispersal in a fragmented Afromontane cloud forest, Taita Hills, Kenya. University of Ghent, Belgium.

Eija Soini , 2006. Livelihood, land use and environment interactions in the highlands of East Africa. https://helda.helsinki.fi/handle/10138/21188

Jussi Ylhäisi, 2006. Traditionally protected forests and sacred forests of Zigua and Gweno ethnic groups in Tanzania.

 

MSc Theses:

Belinda Kivivuori, 2013. The local perception on changes in water availability and accessibility in the Taita Hills, Kenya.

Pekka Itkonen, 2012. Estimating leaf area index and aboveground biomass by empirical modeling using SPOT HRVIR satellite imagery in the Taita Hills, Kenya. https://helda.helsinki.fi/handle/10138/37685

Janne Saarikko, 2012. Kaukokartoitus kansainvälisessä kriisinhallinnassa – IKONOS- ja SPOT -satelliittikuvat tiestön kartoituksessa Kenian Taita Tavetan piirikunnassa.

Nina Kolu, 2012. Modelling least-cost corridors to increase indigenous forest patch connectivity in Taita Hills, Kenya.

Sini Pöytäniemi, 2012. Predicting soil erosion with universal soil loss equation using GIS and remote sensing. A case study in Taita Hills, South Eastern Kenya.

Eeva Ruuska, 2012. The significance and sustainability of charcoal production in the changing landscape of Dakatcha woodland, SE-Kenya. https://helda.helsinki.fi/handle/10138/32704

Karoliina Zschauer, 2012. Households’ energy supply and the use of firewood in the Taita Hills, Kenya. https://helda.helsinki.fi/handle/10138/29517

Dries Van de Loock, 2011. Variatie in sociale structuur in gefragmenteerde populaties van de Cabanis’s greenbul (Phyllastrephus cabanisi) in zuid-oost Kenia. University of Ghent.

Mårten Boström, 2010. The utilization of GPS in orienteering mapping in urban Helsinki and suburban Kenya.

José Gama, 2009. Taita Hills MySQL database, and performing analysis with the statistics package R.

Juuso Vanonen, 2008. The conflicts of land in Taita Taveta District, Kenya.

Anna Ruotsalainen, 2008. Enhancing local livelihoods in Taita Hills, Kenya: Indigenous tree species as part of farmers’ livelihoods and environmental rehabilitation.

Johanna Msagha, 2008. Population development in Taita Taveta – A comparative study to national demographic trends.

Antero Keskinen, 2007. Mapping road infrastructure in developing countries applying remote sensing and GIS – the case of the Taita Hills, Kenya.

Milla Lanne, 2007. Monitoring indigenous tropical montane forests in the Taita Hills using airborne digital camera imagery.(pdf)

Miika Mäkelä, 2006. Aerial photograph segmentation methods in agroforestry studies in Uganda.

Nina Himberg, 2006. Community-based ecotourism as a sustainable development option: Case of the Taita Hills, Kenya. 146 p.

Katja Masalin, 2005. Land use change detection in the Taita Hills, Kenya applying aerial photography and SPOT XS satellite data. (pdf)

Pekka Hurskainen, 2005. Change detection of urban areas in SW-Kenya using airborne and spaceborne remote sensing data. (pdf)

Taru Hermunen, 2004. Land use policy in Kenya – experiences from Taita Taveta district. (pdf)

Päivi Ollikainen, 1990. Pientilallisten mahdollisuudet maidontuotannon tehostamiseen Taitavuorilla, Keniassa.

Petri Pellikka, 1990. Land Use and its Classification Using a Multispectral Spot XS Satellite Image in the Taita Hills, SE-Kenya.

Riikka Raitis, 1990. Population growth and fertility in Kenya and a case study of the Taita-Taveta District.

Yrjö Teinilä,1990. Maaperäeroosio luonnon riskitekijänä Taita Hillsillä Keniassa. Paikallisen väestön näkökulma.

Johanna Vilkuna, 1991. Epävirallinen talous: voimavara Kenian alueellisessa kehityksessä?

Aija Virtanen, 1991. Kenian metsien kohtalo – monimuotoisista metsistä erillisiksi metsäsaarekkeiksi.