Let`s go home ... What`s new ?! Here we are ... Black on white ... Significant ... Visit us ... For bachelor students ... For L3 students ... Furthermore ... Talk to us ...

For intern use only ...

 

Andreas Marten

- PhD student-

Tel.: 06421 - 2826665
Raum 2065
andreas.marten[at]staff.uni-marburg.de

 

termites, population genetics, Macrotermes michaelseni, T-RFLP, rDNA

English

During my diploma thesis I analysed worldwide patterns of genetic differentiation in freshwater invertebrates. I find out that on average freshwater invertebrates of running waters show a higher degree of genetic differentiation than freshwater invertebrates of stagnant water bodies. This pattern occurs probably due to a better active or passive dispersal ability of lentic organisms. Furthermore, I investigated the genetic diversity within and between populations of the spring-dwelling caddis fly Agapetus fuscipes in the Hessian highlands.


termite mount

Macrotermes spec. © H. Boga

Schedorhinotermes spec.

 

Recently I do my PhD at the research group of Prof. Roland Brandl. The research project is part of the SPP 1127 “Radiations” of the DFG. The main part of my research deals with the gut microbiota of higher termites, in particular fungus-growing Macrotermes species. One question is the level of co-evolution between the termite host and the specific gut microbiota. Therefore we assess the variability of the gut microbial community of Macrotermes michaelseni within colonies, between adjacent colonies, between colonies in a region and between colonies in different regions. Furthermore, we want investigate differences in the gut microbiota of different termite species. The characterisation of the microbial community results by tRFLP analyses of the 16S rRNA gene in combination with clone libraries of the gut microbiota. These workings occur in cooperation with the research group of Prof. Andreas Brune at the Max Planck Institute for Terrestrial Microbiology in Marburg. Another part of my research project on termites is the biogeographic history of the African damp-wood termite Schedorhinotermes lamanianus and the worldwide phylogeny of the genus Schedorhinotermes .


A fungus garden ...

Deutsch

Während meiner Diplomarbeit beschäftigte ich mich zum einen im Rahmen einer umfangreichen Literaturanalyse mit generellen Mustern genetischer Diversität bei wirbellosen Süßwasserorganismen. Eines der wichtigsten Ergebnisse war die im Mittel stärkere genetische Differenzierung von Fließgewässerarten im Vergleich zu Stillgewässerarten. Dies wird mit einer besseren aktiven oder passiven Ausbreitungsfähigkeit von Stillgewässerarten in Verbindung gebracht. Des weiteren habe ich die genetische Diversität der quellbach-bewohnenden Köcherfliege Agapetus fuscipes im hessischen Bergland untersucht.

Derzeit arbeite ich im Rahmen des SPP 1127 „Radiationen – Genese biologischer Vielfalt“ der DFG an meiner Doktorarbeit. Einer meiner Forschungsschwerpunkte liegt hier in der Zusammensetzung der mikrobiellen Darmflora von höheren Termiten (Macrotermitinae). Wir interessieren uns insbesondere für die Darmsymbionten der ostafrikanischen, pilzzüchtenden Art Macrotermes michaelseni . Ein Vergleich der Zusammensetzung der Darmflora zwischen Termiten innerhalb einer Kolonie, zwischen benachbarten Kolonien, zwischen Kolonien aus einer Region und schlussendlich der Vergleich zwischen Regionen soll Einblicke in den Grad der Koevolution zwischen Termiten und ihren Darmsymbionten liefern. Die Charakterisierung der mikrobiellen Diversität im Termitendarm erfolgt durch tRFLP-Analysen des 16S rRNA-Gens und durch die Anlage einer Klon-Bibliothek. Die Untersuchungen erfolgen in enger Kooperation mit der Arbeitsgruppe von Prof. Andreas Brune am MPI für Terrestrische Mikrobiologie in Marburg. Ein weiterer Schwerpunkt meiner Arbeit mit Termiten liegt in der biogeographischen Geschichte der holzfressenden Termite Schedorhinotermes lamanianus in Afrika. Darüber hinaus soll eine Phylogenie für die Gattung Schedorhinotermes erarbeitet werden.


termite mount

Sequencing ...

Agapetus fuscipes

 

References:

Marten A. , Kaib M. & Brandl R. (2009) Cuticular hydrocarbon phenotypes do not indicate cryptic species in fungus-growing termites (Isoptera: Macrotermitinae), Journal of Chemical Ecology 35: 572-579

Brändle M., Heuser R., Marten A. & Brandl R. (2007) Population structure of the freshwater flatworm Crenobia alpina (Dana): old lineages and low gene flow, Journal of Biogeography 34: 1183-1192.

A. Marten , M. Brändle & R. Brandl (2006) Habitat type predicts genetic population differentiation in freshwater invertebrates, Molecular Ecology 15: 2643-2651

S. Rösner, A. Marten , J. Meyer & R. Brandl (2006) Im letzten Urwald Europas, Marburger UniJournal 26: 39-42

weitere Publikationen der Arbeitsgruppe.

Talks & Posters

Marten A. , Kaib M. & Brandl R. (2008) Divergence between populations of the dampwood termite Schedorhinotermes lamanianus driven by ancient climate fluctuations, talk at the 23. International Congress of Entomology, Durban

Marten A. , Boga H.I., Andert J., Kaib M., Brune A. & Brandl R. (2008) Intra- and interspecific bacterial diversity within the gut microbiota of fungus-growing termites (Macrotermitinae), poster at the 23. International Congress of Entomology, Durban

Marten A. , Kaib M. & Brandl R. (2008) Are cuticular hydrocarbons involved in speciation of higher termites? talk at the final colloquium of the DFG Priority Program 1127, Bad Honnef

A. Marten, M. Brändle & R. Brandl (2007) Habitat type predicts genetic diversity in freshwater animals: Results of a global survey, awarded poster at the 3rd Biennial Conference of the International Biogeography Society (IBS), Tenerife

A. Marten , M. Brändle & R. Brandl (2005) Habitat type and genetic population differentiation in freshwater animals, talk at the 98 th Annual Meeting of the German Zoological Society (DZG), Bayreuth

M. Brändle, R. Heuser, A. Marten & R. Brandl (2005) Hidden genetic diversity in springs: the freshwater flatworm Crenobia alpina (Dana) in Central Europe, talk at the 35 th Annual Meeting of the Ecological Society of Germany, Switzerland and Austria (GfOe), Regensburg

M. Brändle, R. Heuser, A. Marten & R. Brandl (2006) Hidden diversity and population structure among populations of the freshwater flatworm Crenobia alpina (Dana) in central Europe, talk at the 91 st Annual Meeting of the Ecological Society of America (ESA), Memphis Tennessee

C. Hof, M. Brändle, A. Marten & R. Brandl (2006) Latitudinal patterns of species richness in the European freshwater fauna: dispersal matters, talk at the 91 st Annual Meeting of the Ecological Society of America (ESA), Memphis Tennessee

A. Marten , M. Brändle, F. Fischer & R. Brandl (2006) Population genetics of the spring-dwelling caddis fly Agapetus fuscipes (Trichoptera: Glossosomatidae) on a regional scale, poster at the 36 th Annual Meeting of the Ecological Society of Germany, Switzerland and Austria (GfOe), Bremen

C. Hof, M. Brändle, A. Marten & R. Brandl (2006) Latitudinal patterns of species richness in the European freshwater fauna: Dispersal matters!, poster at the 36 th Annual Meeting of the Ecological Society of Germany, Switzerland and Austria (GfOe), Bremen


Christian Hof and me.

 


Me at a biogeography conference 2007.

 

Cooperations

Research Group “Insect gut microbiology and symbiosis” at the Max Planck Institute for Terrestrial Microbiology

Research Group Manfred Kaib at the Department of Animal Physiology/ University of Bayreuth

Funding

German Research Foundation (DFG): Priority Program SPP-1127 “Adaptive radiation – origin of biological diversity”