Joerg Tews, PhD

Joerg Tews is the Founder and President of Noreca with a PhD in Ecology from Potsdam University, Germany. Joerg is also an Adjunct Professor of Biology at Acadia University. For over 12 years he has designed, developed and managed stand-alone software products, web applications, and database systems using various technologies for Noreca’s national and international clients. Joerg has contributed and co-authored over 35 peer-reviewed publications, book chapters, monographs and technical reports in the field of arctic wildlife biology, simulation modeling, climate change, biodiversity and computer software.

Joerg Tews's Publications

In Press

Tews J, Mineau P, Bert, D. (in press): Estimated mortality of selected migratory bird species from mowing and other mechanical operations in Canadian agriculture, Avian Ecology and Conservation.

Callaghan CJ, Gobeil JF, Tews J, Schmiegelow F, Hebblewhite M, Schmelzer I (submitted) Population viability of the threatened woodland caribou (Rangifer tarandus caribou), boreal population, in Canada. Biological Conservation

2013

Chambers, J, Tews J et al. (2013) The steady-state mosaic of disturbance and succession across an old-growth Central Amazon forest landscape. Proceedings of the National Academy of Science (PNAS), vol. 110 no. 10, p. 3949–3954

2012

Tews J, Callaghan CJ, Jeppesen R (2012) Sensitivity of High Arctic Caribou Population Dynamics to Changes in the Frequency of Extreme Weather Events. In: Brodie et al. (Ed), pages xx-xx, Wildlife Conservation in a Changing Climate, University of Chicago Press, Chicago

2010

Jeltsch F, Blaum N, Lohmann D, Meyfarth S, Rossmanith E, Schütze S, Tews J, Tietjen B, Wichmann M, Wieczorek M (2010): Modelling vegetation change in arid and semi-arid savannas. – In: Schmiedel, U., Jürgens, N. [Eds.]: Biodiversity in southern Africa. Volume 2: Patterns and processes at regional scale: pp. 274–282, Klaus Hess Publishers, Göttingen & Windhoek.

Blaum N, Lohmann D, Rossmanith E, Schütze S, Schwager M, Steinhäuser J, Tews J, Wichmann M, Jeltsch F (2010): Model-based simulation tools. – In: Schmiedel, U., Jürgens, N. [Eds.]: Biodiversity in southern Africa. Volume 2: Patterns and processes at regional scale: pp. 302–306, Klaus Hess Publishers, Göttingen & Windhoek.

Jeltsch F, Blaum N, Classen N, Eschenbach A, Grohmann C, Gröngröft A, Joubert DF, Horn A, Lohmann D, Linsenmair KE, Lück-Vogel M, Medinski TV, Meyfarth S, Mills A, Petersen A, Popp A, Poschlod P, Reisch C, Rossmanith E, Rubilar H, Schütze S, Seymour C, Simmons R, Smit GN, Strohbach M, Tews J, Tietjen B, Wesuls D, Wichmann M, Wieczorek M, Zimmermann I (2010): Impacts of landuse and climate change on the dynamics and biodiversity in the Thornbush Savanna Biome. – In: Hoffman, M. T., Schmiedel, U., Jürgens, N. [Eds.]: Biodiversity in southern Africa. Volume 3: Implications for landuse and management: pp. 33–74, Klaus Hess Publishers, Göttingen & Windhoek.

Tews J (2010) Hummock Vegetation at the Arctic Tree-line Near Chruchill, Manitoba In: Chow L McKay K (eds). Hudson Bay Regional Research. Aboriginal Issues Press, University of Manitoba,Winnipeg. p. 139.

 

2009

Tews J, Mineau P, Bert DG (2009) Avian mortality related to mowing and other mechanical operations in agricultural landscapes, Environment Canada Report, Science and Technology Branch, 92 pages.

Tews J, Broome J (2009) Marine Protected Area (MPA) Network Connectivity Analysis using WebDrogue. Report to Environmental Science Department, Acadia University, 14 p.

Tews J, Fast PLF, Fast M (2009) Climate change effects on wildlife populations In: Harris B., Brown P.L. (Eds), pages 239-252, Wildlife: Destruction, Conservation and Biodiversity, Nova Publishers, New York

2008

Tews J (2008) Population Viability and Sensitivity Analysis for Marsh Wren, Ovenbird, Red-shouldered Hawk, and Bobolink in the Quebec pilot study area in support of Habitat-based Biodiversity Standards under the National Agri-Environmental Standards Initiative (NAESI) in Canada. Report to Environmental Canada, 73 p.

Tews J (2008) Population Viability Analyses for the Quebec pilot study area in support of Habitat-based Biodiversity Standards under the National Agri-Environmental Standards Initiative (NAESI) in Canada. Report to Environmental Canada, 144 p.

2007

Tews J, Carr L, Pierce J (2007) Population Viability Analyses for the Okanagan pilot study area in support of Habitat-based Biodiversity Standards under the National Agri-Environmental Standards Initiative (NAESI) in Canada. Report to the Nature Conservancy Canada, B.C. 50 p.

Tews J, Ferguson MAD, Fahrig L (2007) Potential net effects of climate change on High Arctic Peary caribou: lessons from a spatial-explicit simulation model. Ecological Modelling 207: 85-98.

Tews J, Leonard T (2007) Literature Review and Modeling support for the Wildlife Habitat on Farmland Indicator Program. Report to Agriculture and Agri-food Canada, 39 pages.

Tews J, Ferguson MAD, Fahrig L (2007) Modeling density dependence and climatic disturbances in caribou: a case study from the Bathurst Island complex, Canadian High Arctic. Journal of Zoology 272: 209-217.

Tews J (2007) Habitat Suitability Model and Population Viability Analysis for the Marsh Wren (Cistothorus palustris) and Ovenbird (Seiurus aurocapillus) in support of Habitat-Based Biodiversity Standards under the National Agri-Environmental Standards Initiative (NAESI) in Canada; Report to the Eastern Ontario Model Forest and Environment Canada, 63 p.

Tews J (2007) Climate change decreases stability in a tri-trophic model food web. 1st Annual Meeting Canadian Society for Ecology and Evolution, May 21-24, Toronto, Canada (Conference Proceedings).

2006

Tews J (2006) Climate change and biodiversity: a modeling perspective In: Schwartz J. (Ed), pages 27-41, Focus on Biodiversity Research, Nova Publishers, New York

Tews J, Esther A, Milton SJ, Jeltsch F (2006) Linking a population model with an ecosystem model: assessing the impact of land use and climate change on savanna shrub cover dynamics. Ecological Modelling 195: 219-228.

Tews J, Tischendorf L (2006) A surrogate species approach for developing habitat-based biodiversity standards under the National Agri-Environmental Standards Initiative (NAESI) in Canada; Report to the Eastern Ontario Model Forest and Environment Canada, 53 p.

2005

Sankaran M, Hanan NP, Scholes RJ, Ratnam J, Cade BS, Ardo J, Augustine DJ, Banyikwa F, Bronn A, Bucini G, Caylor K, Coughenour MB, Diouf A, Feral C, February E, Frost P, Gambiza J, Gignoux J, Hiernaux P, Higgins S, Hrabar H, LeRoux X, Ludwig F, Metzger K, Prins HHT, Sea W, Tews J, Worden J (2005) Determinants of woody cover in African savannas. Nature 438: 846-849

Grimm V, Revilla E, Groeneveld G, Kramer-Schadt S, Schwager M, Tews J, Wichmann MC, Jeltsch F (2005) Importance of buffer mechanisms for population viability analysis. Conservation Biology 19: 578-580

Tews J (2005) Individual-based population viability analysis of the black rat snake (Elaphe obsoleta obsoleta) Prepared for Elutis Modelling and Consulting Inc., 21 p.

Tews J, Ferguson MAD, Fahrig L (2005) Assessing the impact of climate change-induced disturbances for population viability of Peary caribou in the Canadian High Arctic. 90th Annual Meeting ESA & IX Intecol, Aug 7-12, Montreal, Canada (Conference Proceedings).

Tews J, Ferguson MAD, Fahrig L (2005) Do high arctic Peary caribou suffer from climate change? 35th Annual International Arctic Workshop, March 9th-12th, Edmonton, Alberta, Canada, p. 57 (Conference Proceedings).

2004

Tews J (2004) Hummock vegetation at the arctic tree-line near Churchill, Manitoba (Canada). The Canadian Field Naturalist 118: 1-5

Tews J, Blaum N, Jeltsch F (2004) Structural and animal species diversity in arid and semi-arid savannas of the southern Kalahari. Annals of Arid Zone 42: 1-13

Tews J, Jeltsch F (2004) Modelling the impact of climate change on woody plant population dynamics in South African savanna. BMC Ecology 4:17 [online]

Tews J, Schurr F, Jeltsch F (2004) Seed dispersal by cattle may cause shrub encroachment of Grewia flava on southern Kalahari rangelands. Applied Vegetation Science 7: 89-102

Tews J (2004) Biodiversity. In: Nutall, M. (Ed.) Encyclopedia of the Arctic , Vol. I-III, Routledge, New York, 1958 pp.

Tews J (2004) Cassiope heaths. In: Nutall, M. (Ed.) Encyclopedia of the Arctic , Vol. I-III, Routledge, New York, 1958 pp.

Tews J (2004) Empetrum heaths. In: Nutall, M. (Ed.) Encyclopedia of the Arctic , Vol. I-III, Routledge, New York, 1958 pp.

Tews J (2004) Back River. In: Nutall, M. (Ed.) Encyclopedia of the Arctic , Vol. I-III, Routledge, New York, 1958 pp.

Jeltsch F, Schwager M, Tews J, Wichmann MC, Steinhauser J, Esther A (2004) Scenario-based mechanistic modelling of biodiversity dynamics using spatially-explicit landscape and population models. In: Beck E, Berendsohn WG, Boutros M, Denich M, Henle K, Juergens N, Kirk M, Wolters V (Ed.) Sustainable use and conservation of biological diversity – a challenge for society, Berlin, p 62-63.

Tews J, Moloney KA, Jeltsch F (2004) Modelling seed dispersal in a variable environment: a case study of the fleshy-fruited savanna shrub Grewia flava. Ecological Modelling 175: 65-76

Tews J (2004) Plant population viability analysis in conservation biology: a review. Prepared for Elutis Modelling and Consulting Inc., 13 p.

Tews J (2004) Population viability of the Behr's Hairstreak in the south Okanagan valley, BC, Canada. Prepared for Elutis Modelling and Consulting Inc., 21 p.

Tews J, Brose U, Grimm V, Tielbörger K, Wichmann MC, Schwager M, Jeltsch F (2004) Animal species diversity driven by habitat heterogeneity/diversity: the importance of keystone structures. Journal of Biogeography 31: 79-92.