Kontakt

 

Leitung

Prof. Dr. Carsten F. Dormann

Telefon: +49 761 203-3749
Telefax: +49 761 203-3751
eMail: carsten.dormann@biom.uni-freiburg.de 

 

Sekretariat:

 

Frau Eva Meier

Telefon: +49 761 203-3749 
Telefax: +49 761 203-3751 
eMail: eva.meier@biom.uni-freiburg.de 

 

Anschrift:

 

Biometrie und Umweltsystemanalyse

Albert-Ludwigs-Universität Freiburg

Tennenbacher Straße 4 
79106 Freiburg i. Br.

 

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Dr. Casper Kraan

casper

Dr. Casper Kraan

Department of Biometry and Environmental System Analysis

Tennenbacher Straße 4, 79106 Freiburg, Germany
Room 03.059

Department of Marine Ecology National Institute of Water and Atmospheric Research - NIWA

Gate 10, Silverdale road, 3216 Hamilton, New Zealand

email: casper.kraan(a)gmail.com
telephone: +49 761 203-98663 

 

 

 

Research Interests

 

  • Community ecology, functional diversity, species interactions
  • Spatial ecology, scale-dependence, cross-scale interactions
  • Increasing interest in Bayesian modelling and SDM in general
  • Marine intertidal areas, macrozoobenthic fauna
  • Shorebirds, foraging ecologys

 

Curriculum Vitae

 

2013-2016   Marie-Curie Research Fellow (IOF) at NIWA, Hamilton, New Zealand, and Univeristy of Freiburg, Germany
2012-2015   Postdoctoral research fellow at NIWA, Hamilton, New Zealand, funded by  a Marsden grant from the Royal Society New Zealand
2010-2011   Postdoctoral research fellow at UFZ, Leipzif, Germany
2010   Postdoctoral research fellow at NIWA, Hamilton, New Zealand
2009-2010   Appointed as Research Assistant to analyze benthic samples from sublittoral mussel-beds at IMARES, the Netherlands.
2000-2006   Benthic mapping and wader-catching in the Dutch Wadden Sea, the Wash, England, a number of estuaries in France, and several sites in the German Wadden Sea.
2003-2010   PhD-student at the Royal Netherlands Institute for Sea Research and the Univesity of Groeningen, the Nederlands.
2002   Research Assistant during a benthic mapping and wadder-catching expedition to the Banc d'Arguin and Diawling National Parc, Mauritania.
2002   Research assistant in a long-term bird-banding project in Swedisch Lapland.
2001   Master-project at the University of Lund, Sweden.
1997-2002   Master of Science Biology, University of Groningen, the Netherlands.

 

Research Interests

 

PUBLICATIONS

Peer-reviewed journals

Lohrer AM, Thrush SF, Hewitt JE & Kraan C. 2015. The up-scaling of ecosystem functions in a heterogeneous world. Scientific Reports 5, 10349.

Pratt DR, Pilditch CA, Lohrer AM, Thrush SF & Kraan C. 2015. Spatial distributions of grazing activity and microphytobenthos reveal scale-dependent relationships across a sedimentary gradient. Estuaries & Coasts 38, 722-734.

Thrush SF, Hewitt JE, Parkes S, Lohrer AM, Pilditch C, Woodin SA, Wethey DS, Chiantore M, Asnaghi V, de Juan S, Kraan C, Rodil I, Savage C & van Colen C. 2014. Experimenting with ecosystem interaction networks in search of threshold potentials in real world marine ecosystems. Ecology 95, 1451-1457.

Calabrese JM, Certain G, Kraan C & Dormann CF. 2014. Stacking species distribution models and adjusting bias by linking them to macroecological models. Global Ecology & Biogeography 23, 99-112.

Kraan C, Aarts G, Piersma T & Dormann CF. 2013. Temporal variability of ecological niches: a study on intertidal macrobenthic fauna. Oikos 122, 754-760. (IF:3.393)

Bijleveld AI, van Gils JA, van der Meer J, Dekinga A, Kraan C, van der Veer HW & Piersma T. 2012. Maximum power for monitoring programmes: optimising sampling designs for multiple monitoring objectives. Methods in Ecology & Evolution 3, 526-536.

Kraan C, Dekinga A & Piersma T. 2011. Now an empty mudflat: past and present benthic abundances in the western Dutch Wadden Sea. Helgoland Marine Research 65, 51-58.

Compton TJ, Kraan C, Rijkenberg MJA, Troost TA, Rogers DI, Leyrer J, Pearson G & Piersma T. 2011. Sampling bivalves on tidal flats: possibility of missing rare species, versus smoothing of environmental variation. Marine Ecology Progress Series 440, 285-288.

Kraan C, van Gils JA, Spaans B, Dekinga A & Piersma T. 2010. Why Afro-Siberian red knots Calidris canutus canutus have stopped staging in the western Dutch Wadden Sea during southward migration. Ardea 98, 155-160.

Kraan C, Aarts, G, van der Meer J & Piersma T. 2010. The role of environmental variables in structuring landscape-scale species distributions in seafloor habitats. Ecology 91, 1583-1590.

Kraan C, van Gils JA, Spaans B, Dekinga A, Bijleveld AI, van Roomen M, Kleefstra R & Piersma T. 2009. Landscape-scale experiment demonstrates that Wadden Sea intertidal flats are used to capacity by molluscivore migrant shorebirds. Journal of Animal Ecology 78, 1259-1268.

Kraan C, van der Meer J, Dekinga A & Piersma T. 2009. Patchiness of macrobenthic invertebrates in homogenized intertidal habitats: hidden spatial structure at a landscape scale. Marine Ecology Progress Series 383, 211-224.

Compton TJ, Troost TA, Drent J, Kraan C, Bocher P, Leyrer J, Dekinga A & Piersma T. 2009. Repeatable sediment associations of burrowing bivalves across six European tidal flat systems. Marine Ecology Progress Series 382, 87-98.

van Gils JA, Kraan C, Dekinga A, Koolhaas A, Drent J, de Goeij P & Piersma T. 2009. Reversed optimality and predictive ecology: burying depth forecasts population change in a bivalve. Biology Letters 5, 5-8.

Compton TJ, Troost TA, van der Meer J, Kraan C, Pearson GB, Honkoop PCJ, de Goeij P, Rogers DI, Bocher P, Lavaleye MSS, Leyrer J, Dekinga A & Piersma T. 2008. Distributional overlap rather than habitat differentiation characterizes co-occurrence of bivalves in intertidal soft sediment systems. Marine Ecology Progress Series 373, 25-35.

Bocher P, Piersma T, Dekinga A, Kraan C, Yates MG, Guyot T, Folmer EO & Radenac G. 2007. Site- and species-specific distribution patterns of molluscs at five intertidal soft-sediment areas in northwest Europe during a single winter. Marine Biology 151, 577-594.

Kraan C, Piersma T, Dekinga A, Koolhaas A & van der Meer J. 2007. Dredging for edible Cockles Cerastoderma edule on intertidal flats: short-term consequences of fisher patch-choice decisions for target and non-target fauna. ICES Journal of Marine Science 64, 1735-1742.

van Gils JA, Piersma T, Dekinga A, Spaans B & Kraan C. 2006. Shellfish-dredging pushes a flexible avian toppredator out of a protected marine ecosystem. Public Library of Science Biology 4, 2399-2404.

 

Book chapters

Piersma T, Kraan C & Dekinga A. 2009. Hoe het Nonnetje verdween uit de westelijke Waddenzee. In: Cadée GC, van Leeuwen S, ter Poorten JJ (eds). Schitterende Schelpen en Slijmerige Slakken. Nederlandse Malacologische Vereniging, Leiden, p 96-99.

 

SCIENTIFIC COMMUNICATIONS

Andresen H, Thrush SF & Kraan C. 2015. Adult-juvenile associations in bivalves disentangled from environment. European Marine Biology Symposium (EMBS). Helgoland, Germany.

Pratt D, Pilditch C, Lohrer AM, Thrush SF & Kraan C. 2015. Deposit feeding activity and microphyte biomass relationships across a benthic sediment gradient. European Marine Biology Symposium (EMBS). Helgoland, Germany.

Douglas E, Pilditch C, Kraan C, Schipper L, Lohrer AM & Thrush SF. 2015. Macrobenthic community composition drives denitrifierresponse to nutrient loading. European Marine Biology Symposium (EMBS). Helgoland, Germany.

Kraan C, Greenfield BL, Dormann CF & Thrush SF. 2014. Spatial structuring of biodiversity. Ecological Society of Australia (ESA). Alice Springs, Australia.

Kraan C, Finley AO, Thrush SF, Piersma T & Dormann CF. 2014. Putting biotic interactions into distribution analysis. Ecological Society of America (ESA). Sacramento, USA.

Kraan C, Finley AO, Thrush SF, Piersma T & Dormann CF. 2014. Conservation strategies should encompass species interactions and spatial autocorrelation. Australian Marine Science Association (AMSA). Canberra, Australia.

Hines L, Pilditch C, Kraan C, Lohrer D & Thrush SF. 2014. The effect of enhanced nutrient levels on coastal ecosystem functions. Golden Key International Summit, Boston, USA.

Thrush S, Hewitt J, Parks S, Lohrer D, Pilditch C, van Colen C, Woodin S, Wethey D, Chiantore M, Asnaghi V & Kraan C. Integrating causal and exploratory techniques to indicate threshold potentials in real world ecosystem dynamics. 2013. Coastal and Estuarine Research Federation (CERF). San Diego, USA.

Kraan C, A Finley, C Dormann & S Thrush. 2013. Spatial perspectives in ecology. New Zealand Marine Science Society conference (NZMSS). Hamilton, New Zealand.

Greenfield BL, C Pilditch, C Kraan, JE Hewitt & Thrush SF. 2013. Resilience of sandflats indicated by variation in functional group diversity. New Zealand Marine Science Society conference (NZMSS). Hamilton, New Zealand.

Dormann CF, G Certain & C Kraan. 2012. Informed constraint: merging single-species predictions with community indices to predict local community composition. Annual Meeting of the Ecological Society of Germany, Austria and Switzerland (GFŐ). Luneburg, Germany.

Aarts G, AD Rippen, A Dekinga, S Holthuijsen, C Kraan & Piersma T. 2011. Spatial patterns of intertidal benthic macrofauna: connecting species characteristics with small- and large-scale patchiness. International Symposium on the Ecology of the Wadden Sea. Texel, the Netherlands.

Dormann C & C Kraan. 2011. How (not) to analyse biotic interactions in species distribution models. Annual Meeting of the Ecological Society of Germany, Austria and Switzerland (GFŐ). Oldenburg, Germany.

Kraan C, Aarts G, van der Meer J & Piersma T. 2011. The role of environmental variables in structuring landscape-scale species distributions in seafloor habitats. Benthic Ecology Meeting, Mobile, USA.                       

Aarts G, Holthuijsen S, ten Horn J, Smith J, Brugge M, Dekinga A, Kraan C, Bijleveld AI, Rippen A, Dapper R, van Gils JA, van der Meer J, van der Veer HW & Piersma T. 2009. SIBES: Synoptic Intertidal BEnthic Sampling. Sea and Coastal research programme (ZKO) kick-off symposium. Texel, the Netherlands.

van Gils JA, van der Geest M, Kraan C & Piersma T. 2009. Coupled carrying capacities of the Wadden Sea and the Banc d’Arguin for wintering waders. FOKUZ-meeting (Fundamental Research Coast and Sea). Amsterdam, the Netherlands.

Kraan C, van Gils JA, Spaans BS & Piersma T. 2008. Landscape-scale feeding in shorebirds. NERN-meeting (Netherlands Ecological Research Network). Lunteren, the Netherlands.

Compton TJ, Troost TA, Kraan C, Pearson GB, Honkoop P, de Goeij P, Bocher P, Lavaleye M, Leyrer J, Evers A, Dekinga A, van der Meer J & Piersma T. 2007. Diversity of bivalves is not related to the range of sediments at local and global scales. British Ecological Society Annual Symposium: Speciation and Ecology. Sheffield, UK.

Compton TJ, Troost TA, van der Meer J, Kraan C, Honkoop PJC, Rogers DI, Pearson GB, de Goeij P, Bocher P, Lavaleye MSS, Leyrer J, Yates MG, Dekinga A & Piersma T. 2007. Do tropical bivalves have narrower realised niches than temperate bivalves? Biennial Conference of the International Biogeography Society. Tenerife, Canary Islands, Spain.

Cardoso JFMF, Kraan C, Dekker R, Daan R, Witte JIJ, van der Veer HW. 2007. Ensis americanus in Dutch coastal waters: from invader to permanent resident. International Conference on Shellfish Restoration (ICSR). Vlissingen, the Netherlands.

Kraan C, van Gils JA, Spaans BS, Dekinga A & Piersma T. 2007. Decline over time in foraging opportunity and spatial predictability in a digestively-constrained forager, the red Knot (Calidris canutus), at landscape scale. International Wader Study Group Meeting (IWSG). La Rochelle, France.

 

 

 

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