Signatures of fe-/male fertility - Using long-term selection for high fertility to decipher the genetics of increased reproductive performance Adaptation
By comparing genomes of high fertility mouse lines with genomes of non-selected mice we aim to identify signatures of selection (= occurrence and frequency patterns of alleles causal for the selected reproductive trait). General applicability of results will then be tested in other mammal species (pigs, lions;) Sperm parameters to correlate male fertility will be evaluated by colleagues in the Dept. of Reproduction Biology.
The project is realized under the leadership of the FBN together with other collaboration partners (IKMB Kiel, IFN Schönow, BHZP, Geolifes).
Funded by the Leibniz-Association (Leibniz Competitive Fund 2018-2020, FBN-3-SOS-FERT).
Invertebrate-derived DNA for monitoring (urban) Wildlife in Berlin Conservation
The use of mosquitoes and flies (in particular the blood of animals they fed on), collected in parks in and around Berlin, offers a non-invasive way to survey wildlife occurrence and distribution in cities. The meta-barcoded sequence data from the blood ingested by the insects will also be correlated to the “collection systems” (flies vs. mosquitos) to analyse the impact the choice of the “collection system” has on the outcome.
This study is part of the ongoing Bridging in Biodiversity of Science (BIBs) project funded by the BMBF (2017-2020).
- Comparative Environmental Epigenomics in Wild life Adaptation
Epigenetic changes function as flexible mechanisms to increase a species' adaptability to environmental changes, but past studies have focused mostly on maternal effects. Here we study parental transmitted epigenetic responses and ask also if different environmental changes invoke different or similar responses. (See also archive: "Paternal epigenetic effects: Do fathers transmit their experiences to their sons?")
Funded by the Leibniz-Association (Leibniz Competitive Fund 2018-2020, IZW Project).
Related publications: Weyrich A, Lenz D, Fickel J (2018) Environmental change-dependent transgenerational epigenetic response. Genes 10(1), 4. Special Issue on Epigenetics and Adaptation (invited)
The genomic basis of convergent evolution in modern sloths (Xenarthra, Pilosa) Adaptation
- Computational methods in ecology and evolutionary research Adaptation Conservation
We identify challenging computational tasks in the research projects in which we are involved in and implement general solutions that can also be used by others. Some of the tools we have created or significantly contributed to (usually R packages) are used by many scientists around the world (e.g. camtrapR, climwin).
Understanding demographic change in an expanding population through simulation modelling Adaptation Conservation
Understanding the demographic pathways that affect population growth (e.g. survival, reproduction, and dispersal) is difficult as they are interconnected and undergo complex feedback loops. Based on data from a 22+ year study of the spotted hyena (Crocuta crocuta) in the Ngorongoro Crater, Tanzania, an individual based simulation model is built to understand the demographic pathways that facilitate such growth, how they may limit population expansion, and what evolutionary consequences may arise.
This project is funded by a DAAD Fellowship to Dr. Liam Bailey.
Conservation genomics of the Hooded Grebes Podiceps gallardoi in Argentina Conservation
The Hooded Grebe Podiceps gallardoi is a critically endangered endemic bird of the southernmost part of continental Argentina. The species very restricted reproductive conditions in lakes of basaltic pre-andean plateaus led to its discovery only in 1974. Since then, population size has dropped by 80%, leaving about 800 individuals. Identified threats include, invasive American minks, introduced trouts, and climate change. In winter, hooded grebes migrate towards the estuaries of the Atlantic Ocean returning to the plateaus in spring. A relatively constant number of individuals at each plateau during successive breeding seasons suggests that Hooded Grebes are phylopatric to breeding plateaus. We test this hypothesis using a ddRADseq approach, on populations of three different plateaus. We expect to find a significant population structure if Hooded Grebes are phylopatric to these plateaus.
This project is funded by an Alexander von Humboldt Foundation "Research Fellowship for Experienced Researchers" to Dr. Bettina Mahler.
Wild boar in rural and urban environments Adaptation
We are generating and analysing wild boar population genetic data to be matched with behavioural and dietary data to test the hypothesis that there are genetic, behavioural and dietary differences between city dwelling wild boar and their rural conspecifics. In the long run we aim to identify traits reflecting adaptations to the respective habitat.
Population genetics in hedgehogs in the city of Berlin Adaptation Conservation
By genotyping a large number of hedgehogs we test the hypothesis that the urban hedgehog population of Berlin is genetically structured. Given the highly structured urban landscape we predict that a higher structured landscape will lead to smaller subpopulations (structured meta-population). If such population genetic structure is detected we aim to identify the urban landscape barriers responsible for such structure.
This project is conceptually led by colleagues from the “Urban Ecology Group”.
Inferring genetic patterns of on-going recolonization of Central Europe by elusive, large carnivores using novel SNP marker systems for non-invasive samples Conservation
By developing SNP marker systems to genetically monitor European carnivores, we provide tools to understand how these elusive species co-exist with humans and recolonize densely populated areas with intensive land-use. This network project, headed by the research institute Senckenberg Gelnhausen, focused on five species: European wildcat, wolf, otter, lynx, and brown bear. Research at the IZW focused on the Eurasian lynx (Lynx lynx), the Eurasian otter (Lutra lutra) and the Eurasian brown bear (Ursus arctos arctos).
Funded by the Leibniz-Association (Leibniz Competitive Fund SAW 2011-2014, SGN-3).