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Department of Animal Ecology and Tropical Biology

Dr. Alice Claßen

Dr. Alice Claßen

Department of Animal Ecology and Tropical Biology
Biocenter, University of Würzburg
Am Hubland
97074 Würzburg
Room: C044
Phone: +49 931 31-82793
ORCID: https://orcid.org/0000-0002-7813-8806
Classen

  • Ecological and evolutionary forces shaping the functional and phylogenetic diversity of insects along elevational gradients
  • macroecology
  • tropical plant-pollinator interaction networks
  • Ecosystem service capacity of pollinators

Ongoing research projects

beta4: Enhancing the structural diversity between patches for improving multidiversity and multifunctionality in production forests (FOR5375:). SP6: Plant-Animal Interactions - pollination, parasitism and seed dispersal (PI, together with Ingolf Steffan-Dewenter & Heike Feldhaar)

Alice Claßen (PI), Ingolf Steffan-Dewenter (PI), Clàudia Massó (PhD), Markus Meißner (Master), Annika Klein (Master), Anjelica Scherer (Bachelor)

 

ADaptation of Alpine Pollinators in Times of Global Change (ADAPT)

Junior research group in the Bavarian climate research network ("Bayerischen Klimaforschungsnetzwerk (bayklif)")

 https://www.bayklif.de/juniorgruppen/adapt/

Alice Claßen (PI), Anne Fabienne Maihoff (PhD), Janika Kerner (PhD)

 

Alumni

Kristof Brenzinger (Postdoc)

Nikki Sauer (Master student)

Peter Väth (TA)

Manuel Kuhn (Bachelor student)

Simon Schoger (Bachelor student)

Lukas Bofinger (Master student)

Irina Schemm (Bachelor student)

Elisa Treffehn (Bachelor student)

Simone Sahler (Bachelor student)

Katharina Kallnik (TA)

 

The research group ADAPT

ADAPT investigates how pollinators respond to climatic changes. We explore this at different levels of biological organization, i.e. from a molecular level up to the communtiy level.

Our main research questions are:

(1) How did pollinator communities in the national park Berchtesgaden change along elevational gradients within the last 10 years?

(2) Do pollinators that strongly respond to climatic changes share certain traits?

(3) How do bumblebee colonies perform in different climate and how do they respond to a climatic changes?

(4) What is the molecular basis of thermal adaptation in Bombus lucorum?

(5) How does land use impact the adaptation capacity of pollinator species?

 

Kilimanjaro Project SP7: Effects of climate und land use change on biodiversity and ecosystem functioning of pollinators and decomposers

Alice Claßen, Ingolf Steffan-Dewenter

  • Acceptance of a W2 Professorship in Animal Ecology at the University of Bremen, starting January 1, 2025.
  • 2018- 2023 Leader of the junior research group "ADaptation of Alpine Pollinators in Times of global change" (ADAPT). University of Würzburg, Germany. 
  • 2015 - 2017 Postdoc at the University of Würzburg, Germany. Project: KiLi Sub Project 7: Effects of climate und land use change on biodiversity and ecosystem functioning of pollinators and decomposers
  • 2015: 6 months full-time partental leave (back in part time position) 
     
  • 2010-2014 PhD student at the University of Würzburg, Germany. Project: KiLi Sub Project 7: Effects of climate und land use change on biodiversity and ecosystem functioning of pollinators and decomposers
     
  • 2009 Diploma thesis in the population genetics group of the Dep. of Entomology, Max-Planck-Institute for Chemical Ecology, Jena (Germany). Subject: “On the trail of evolution: Which factors cause intraspecific variation in the sex pheromone of heliothine moths?”
     
  • 2008 field research on heliothine moths in North Carolina State University, Dept. Entomology, 3107 Gardner Hall, Raleigh, NC.
     
  • 2007 voluntary work in the cloud and rain forest of South America, Jatun Sacha Foundation, Ecuador.
     
  • 2004-09 Studies in Biology (majored in ecology) at the Free University of Berlin, Germany.

2024[ to top ]
  • Kerner JM, König S, Maihoff F, Bofinger L, Sauer N, Ssymank A, Väth P, Classen A (2024) Transect walks and malaise traps differ in temperature sensitivity but reveal consistent drivers of pollinator richness. Insect Conservation and Diversity 17: 743–757.
  • Klaus F, Ayasse M, Classen A, Dauber J, Diekötter T, Everaars J, Fornoff F, Greil H, Hendriksma HP, Jütte T, Klein AM, Krahner A, Leonhardt SD, Lüken DJ, Paxton RJ, Schmid-Egger C, Steffan-Dewenter I, Thiele J, Tscharntke T, Erler S, Pistorius J (2024) Improving wild bee monitoring, sampling methods, and conservation. Basic and Applied Ecology 75: 2–11.
  • König S, Krauss J, Classen A, Hof C, Prietzel M, Wagner C, Steffan‐Dewenter I (2024) Micro‐ and macroclimate interactively shape diversity, niches and traits of Orthoptera communities along elevational gradients. Diversity and Distributions 30: e13810.
2023[ to top ]
  • Maihoff F, Friess N, Hoiss B, Schmid-Egger C, Kerner J, Neumayer J, Hopfenmüller S, Bässler C, Müller J, Classen A (2023) Smaller, more diverse and on the way to the top: Rapid community shifts of montane wild bees within an extraordinary hot decade. Diversity and Distributions 29: 272-288.
  • Maihoff F, Sahler S, Schoger S, Brenzinger K, Kallnik K, Sauer N, Bofinger L, Schmitt T, Nooten SS, Classen A (2023) Cuticular hydrocarbons of alpine bumble bees (Hymenoptera: Bombus) are species-specific, but show little evidence of elevation-related climate adaptation. Frontiers in Ecology and Evolution 11: 1082559.
  • Dzekashu FF, Pirk CWW, Yusuf AA, Classen A, Kiatoko N, Steffan-Dewenter I, Peters MK, Lattorff HMG (2023) Seasonal and elevational changes of plant-pollinator interaction networks in East African mountains. Ecology and Evolution 13: e10060.
  • Müller J, Mitesser O, Cadotte MW, van der Plas F, Mori AS, Ammer C, Chao A, Scherer-Lorenzen M, Baldrian P, Bässler C, Biedermann P, Cesarz S, Claßen A, Delory BM, Feldhaar H, Fichtner A, Hothorn T, Kuenzer C, Peters MK, Pierick K, Schmitt T, Schuldt B, Seidel D, Six D, Steffan-Dewenter I, Thorn S, von Oheimb G, Wegmann M, Weisser WW, Eisenhauer N (2023) Enhancing the structural diversity between forest patches—A concept and real-world experiment to study biodiversity, multifunctionality and forest resilience across spatial scales. Global Change Biology 29: 1437-1450.
  • Kerner JM, Krauss J, Maihoff F, Bofinger L, Classen A (2023) Alpine butterflies want to fly high: Species and communities shift upwards faster than their host plants. Ecology 104: _e3848.
2022[ to top ]
  • Welti EAR, Zajicek P, Frenzel M, Ayasse M, Bornholdt T, Buse J, Classen A, Dziock F, Engelmann RA, Englmeier J, Fellendorf M, Förschler MI, Fricke U, Ganuza C, Hippke M, Hoenselaar G, Kaus‐Thiel A, Kerner J, Kilian D, Mandery K, Marten A, Monaghan MT, Morkel C, Müller J, Puffpaff S, Redlich S, Richter R, Rojas‐Botero S, Scharnweber T, Scheiffarth G, Yáñez PS, Schumann R, Seibold S, Steffan‐Dewenter I, Stoll S, Tobisch C, Twietmeyer S, Uhler J, Vogt J, Weis D, Weisser WW, Wilmking M, Haase P (2022) Temperature drives variation in flying insect biomass across a German malaise trap network. Insect Conservation and Diversity 15: 168-180.
  • Sponsler DB, Requier F, Kallnik K, Classen A, Maihoff F, Sieger J, Steffan-Dewenter I (2022) Contrasting patterns of richness, abundance, and turnover in mountain bumble bees and their floral hosts. Ecology: e3712.
  • Sponsler D, Kallnik K, Requier F, Classen A, Maihoff AF, Sieger J, Steffan-Dewenter I (2022) Floral preferences of mountain bumble bees are constrained by functional traits but flexible through elevation and season. Oikos: e08902.
  • Nevo O, Cazetta E, Classen A, Kuppler J (2022) Editorial: Anthropogenic stressors and animal-plant interactions: Implications for pollination and seed dispersal. Frontiers in Ecology and Evolution 10: 1048331.
  • Müller J, Scherer-Lorenzen M, Ammer C, Eisenhauer N, Seidel D, Schuldt B, Biedermann P, Schmitt T, Künzer C, Wegmann M, Cesarz S, Peters M, Feldhaar H, Steffan-Dewenter I, Claßen A, Bässler C, von Oheimb G, Fichtner A, Thorn S, Weisser W (2022) BETA-FOR: Erhöhung der strukturellen Diversität zwischen Waldbeständen zur Erhöhung der Multidiversität und Multifunktionalität in Produktionswäldern. Antragstext für die DFG Forschungsgruppe FOR 5375. In.
  • Moreaux C, Meireles DA, Sonne J, Badano EI, Classen A, González-Chaves A, Hipólito J, Klein A-M, Maruyama PK, Metzger JP, Philpott SM, Rahbek C, Saturni FT, Sritongchuay T, Tscharntke T, Uno S, Vergara CH, Viana BF, Strange N, Dalsgaard B (2022) The value of biotic pollination and dense forest for fruit set of {Arabica} coffee: {A} global assessment. Agriculture, Ecosystems & Environment 323: 107680.
  • Ziegler A, Meyer H, Otte I, Peters MK, Appelhans T, Behler C, Böhning-Gaese K, Classen A, Detsch F, Deckert J, Eardley CD, Ferger SW, Fischer M, Gebert F, Haas M, Helbig-Bonitz M, Hemp A, Hemp C, Kakengi V, Mayr AV, Ngereza C, Reudenbach C, Röder J, Rutten G, Costa DS, Schleuning M, Ssymank A, Steffan-Dewenter I, Tardanico J, Tschapka M, Vollstädt MGR, Wöllauer S, Zhang J, Brandl R, Nauss T (2022) Potential of Airborne LiDAR Derived Vegetation Structure for the Prediction of Animal Species Richness at Mount Kilimanjaro. Remote Sensing 14: 786.
  • Brenzinger K, Maihoff F, Peters MK, Schimmer L, Bischler T, Classen A (2022) Temperature and livestock grazing trigger transcriptome responses in bumblebees along an elevational gradient. iScience 25: 105175.
  • Allen-Perkins A, Magrach A, Dainese M, Garibaldi LA, Kleijn D, Rader R, Reilly JR, (. ) (2022) CropPol: A Dynamic, Open and Global Database on Crop Pollination. Ecology 103: e3614.
2021[ to top ]
  • Albrecht J, Peters MK, Becker JN, Behler C, Classen A, Ensslin A, Ferger SW, Gebert F, Gerschlauer F, Helbig-Bonitz M, Kindeketa WJ, Kühnel A, Mayr AV, Njovu HK, Pabst H, Pommer U, Röder J, Rutten G, Schellenberger Costa D, Sierra-Cornejo N, Vogeler A, Vollstädt MGR, Dulle HI, Eardley CD, Howell KM, Keller A, Peters RS, Kakengi V, Hemp C, Zhang J, Manning P, Mueller T, Bogner C, Böhning-Gaese K, Brandl R, Hertel D, Huwe B, Kiese R, Kleyer M, Leuschner C, Kuzyakov Y, Nauss T, Tschapka M, Fischer M, Hemp A, Steffan-Dewenter I, Schleuning M (2021) Species richness is more important for ecosystem functioning than species turnover along an elevational gradient. Nature Ecology & Evolution 5: 1582–1593.
2020[ to top ]
  • Peters MK, Classen A, Müller J, Steffan-Dewenter I (2020) Increasing the phylogenetic coverage for understanding broad-scale diversity gradients. Oecologia 192: 629-639.
  • Classen A, Eardley CD, Hemp A, Peters MK, Peters RS, Ssymank A, Steffan‐Dewenter I (2020) Specialization of plant–pollinator interactions increases with temperature at Mt. Kilimanjaro. Ecology and Evolution 10: 2182-2195.
2019[ to top ]
  • Maas B, Heath S, Grass I, Cassano C, Classen A, Faria D, Gras P, Williams-Guillén K, Johnson M, Karp DS, Linden V, Martínez-Salinas A, Schmack JM, Kross S (2019) Experimental field exclosure of birds and bats in agricultural systems — Methodological insights, potential improvements, and cost-benefit trade-offs. Basic and Applied Ecology 35: 1-12.
  • Dainese M, Martin EA, Aizen MA, Albrecht M, Bartomeus I, Bommarco R, Carvalheiro LG, Chaplin-Kramer R, Gagic V, Garibaldi LA, Ghazoul J, Grab H, Jonsson M, Karp DS, Kennedy CM, Kleijn D, Kremen C, Landis DA, Letourneau DK, Marini L, Poveda K, Rader R, Smith HG, Tscharntke T, Andersson GKS, Badenhausser I, Baensch S, Bezerra ADM, Bianchi FJJA, Boreux V, Bretagnolle V, Caballero-Lopez B, Cavigliasso P, Ćetković A, Chacoff NP, Classen A, Cusser S, da Silva e Silva FD, de Groot GA, Dudenhöffer JH, Ekroos J, Fijen T, Franck P, Freitas BM, Garratt MPD, Gratton C, Hipólito J, Holzschuh A, Hunt L, Iverson AL, Jha S, Keasar T, Kim TN, Kishinevsky M, Klatt BK, Klein A-M, Krewenka KM, Krishnan S, Larsen AE, Lavigne C, Liere H, Maas B, Mallinger RE, Pachon EM, Mart\’ınez-Salinas A, Meehan TD, Mitchell MGE, Molina GAR, Nesper M, Nilsson L, O\textquotesingleRourke ME, Peters MK, Plećas M, Potts SG, de L. Ramos D, Rosenheim JA, Rundlöf M, Rusch A, Sáez A, Scheper J, Schleuning M, Schmack JM, Sciligo AR, Seymour C, Stanley DA, Stewart R, Stout JC, Sutter L, Takada MB, Taki H, Tamburini G, Tschumi M, Viana BF, Westphal C, Willcox BK, Wratten SD, Yoshioka A, Zaragoza-Trello C, Zhang W, et al. (2019) A global synthesis reveals biodiversity-mediated benefits for crop production. Science advances 5: eaax0121.
  • Peters MK, Hemp A, Appelhans T, Becker JN, Behler C, Classen A, Detsch F, Ensslin A, Ferger SW, Frederiksen SB, Gebert F, Gerschlauer F, Gütlein A, Helbig-Bonitz M, Hemp C, Kindeketa WJ, Kühnel A, Mayr AV, Mwangomo E, Ngereza C, Njovu HK, Otte I, Pabst H, Renner M, Röder J, Rutten G, Costa DS, Sierra-Cornejo N, Vollstädt MGR, Dulle HI, Eardley CD, Howell KM, Keller A, Peters RS, Ssymank A, Kakengi V, Zhang J, Bogner C, Böhning-Gaese K, Brandl R, Hertel D, Huwe B, Kiese R, Kleyer M, Kuzyakov Y, Nauss T, Schleuning M, Tschapka M, Fischer M, Steffan-Dewenter I (2019) Climate–land-use interactions shape tropical mountain biodiversity and ecosystem functions. Nature 568: 88-92.
2018[ to top ]
  • Groot AT, Nojima S, Heath JJ, Ammagarahalli B, van Wijk M, Classen A, Santangelo RG, Lopez J, Schal C (2018) Alcohol Contributes to Attraction of Heliothis (= Chloridea) virescens Males to Females. Journal of Chemical Ecology 44: 621-630.
  • Nojima S, Classen A, Groot AT, Schal C (2018) Qualitative and quantitative analysis of chemicals emitted from the pheromone gland of individual Heliothis subflexa females. PLOS ONE 13: 1-13.
  • Albrecht J, Classen A, Vollstädt MGR, Mayr A, Mollel NP, Schellenberger Costa D, Dulle HI, Fischer M, Hemp A, Howell KM, Kleyer M, Nauss T, Peters MK, Tschapka M, Steffan-Dewenter I, Böhning-Gaese K, Schleuning M (2018) Plant and animal functional diversity drive mutualistic network assembly across an elevational gradient. Nature Communications 9: 3177.
2017[ to top ]
  • Classen A, Steffan‐Dewenter I, Kindeketa WJ, Peters MK (2017) Integrating intraspecific variation in community ecology unifies theories on body size shifts along climatic gradients. Functional Ecology 31: 768-777.
  • Schellenberger Costa D, Classen A, Ferger S, Helbig-Bonitz M, Peters M, Böhning-Gaese K, Steffan-Dewenter I, Kleyer M (2017) Relationships between abiotic environment, plant functional traits, and animal body size at Mount Kilimanjaro, Tanzania. PloS one 12: e0174157.

Peters MK, Hemp A, Appelhans T, Behler C, Classen A, Detsch F, Ensslin A, Ferger SW, Frederiksen SB, Gebert F, Haas M, Helbig-Bonitz M, Hemp C, Kindeketa WJ, Mwangomo E, Ngereza C, Otte I, Röder J, Rutten G, Schellenberger Costa D, Tardanico J, Zancolli G, Deckert J, Eardley CD, Peters RS, Rödel M-O, Schleuning M, Ssymank A, Kakengi V, Zhang J, Böhning-Gaese K, Brandl R, Kalko EKV, Kleyer M, Nauss T, Tschapka M, Fischer M, Steffan-Dewenter I (2016). Predictors of elevational biodiversity gradients change from single taxa to the multi-taxa community level. Nature Communications 7: 13736. 

Classen A, Peters MK, Kindeketa WJ, Appelhans T, Eardley C, Gikungu MW, Hemp A, Nauss T, and Steffan-Dewenter I (2015) Temperature versus resource constraints: which factors determine bee diversity on Mt. Kilimanjaro, Tanzania? Global Ecology and Biogeography 24: 642-652. 

Classen A, Peters MK, Ferger SW, Helbig-Bonitz M, Schmack JM, Maassen G, Schleuning M, Kalko EKV, Böhning-Gaese K, and Steffan-Dewenter I (2014). Complementary ecosystem services provided by pest predators and pollinators increase quanitity and quality of coffee yields. Proceedings of the Royal Society B 281: 20133148.

Groot AT, Schöfl G, Inglis O,Donnerhacke S, Classen A, Schmalz A, Santangelo RG, Emerson J, Gould F, Schal C, and Heckel DG (2014). Within-population variability in a moth sex phermone blend: genetic basis and behavioural consequences. Proceedings of the Royal Society B 281: 20133054.

Groot AT,  Classen A, Inglis O, Blanco CA,  Lopez J Jr, Vargas AT, Schal C, Heckel DG and Schoefl G (2011). Genetic differentiation across North America in the generalist moth Heliothis virescens and the specialist H. subflexa. Molecular Ecology 20: 2676-2692.

Groot AT, Classen A, Staudacher H, Schal C, and Heckel DG (2010). Phenotypic plasticity in sexual communication signal of a noctuid moth. Journal of Evolutionary Biology 23: 2731-2738.

Groot AT, Blanco CA, Classen A, Inglis O, Santangelo RG, Lopez J Jr, Heckel DG and Schal C (2010). Variation in Sexual Communication of the Tobacco Budworm, Heliothis virescens. Southwestern Entomologist 35: 367-372.