Recently, Rob co-authored three popularising papers related to our research topics. In the last issue of Živa, a popularising journal of the Czech Academy of Sciences, there are two papers written together with Jana Jersáková. The main paper focuses on mutual relationships of flowering plants and their pollinators, including its evolution. The second paper describes and discusses pollination syndromes. A week ago, a brief description of the projects on dynamics of biodiversity in the Kruger National Park in relation to water stress and herbivores was published in Botanika, a popularising journal of the Institute of Botany CAS. All three papers are freely accessible, click the links above. Although in Czech, there are some nice pictures.
Tropical ecosystems are often considered as highly stable environments with negligible seasonality. The opposite is true and many tropical biomes, including lowland rainforests, are strongly seasonal in both environmental conditions and dynamics of communities. This is evidenced also by our newest paper published in the Ecology and Evolution journal just two days ago. Based on our very intensive sampling of butterflies and moths in rainforests of the lower elevations of Mount Cameroon, we are showing the dynamics of their communities in relation to the local seasonal changes of dry and rainy periods. Although we are not covering the high wet season (the monthly precipitation exceeds 2 metres during that period), there is a strong seasonal turnover of community composition. Simultaneously, we are showing the dynamics of species richness: in most groups, species richness drops during rains and then rises towards the high dry season. Subsequently, diversity of some groups continues to increase towards the rain season beginning, whilst others reach their richness peak in the high dry season. Congratulations to Vincent’s first first-authored “big ecological paper”! Now, he is analysing how this seasonal dynamics influence elevational diversity patterns.
Full citation: Maicher V., Sáfián S., Murkwe M., Przybyłowicz Ł., Janeček Š., Fokam E.B., Pyrcz, T. & Tropek R. (2018) Flying between raindrops: Strong seasonal turnover of several Lepidoptera groups in lowland rainforests of Mount Cameroon. Ecology & Evolution. https://doi.org/10.1002/ece3.
Sylvain and Rob have spent a bit over two weeks in the Kruger National Park, South Africa, they are coming back tomorrow. They have been sampling moths and recording bats for the larger project of Petr Pysek and David Storch focused on the role of seasonal rivers for dynamics of biodiversity in African savannas. Despite some initial difficulties caused by delivery delays of our equipment, the sampling was successful and they are bringing back moths and data from 30 plots in the southern part of the park. This material will be processed in the coming months, whilst Rob and Sylvain are already arranging the next sampling in February/March 2019.
On Monday, Rob gave an invited talk at the Biological Colloquium of the Institute of Zoology, University of Bonn, Germany. He summarised our results of analysing almost 50 thousands butterflies and moths recorded during our sampling along the altitudinal gradient of Mount Cameroon between 2014 and 2017. Vincent and Sylvain, the two PhD students currently responsible for the analyses, helped with the talk preparation crucially. Altogether, it was for the first time we put all the data and results together into some concise synthesis. Simultaneously, Rob met our friend and collaborator Marianne Espeland from the Zoological Research Museum Alexander Koenig, and together discussed progress on various projects.
Recently, we have finished the pilot experiment of transplant of zygopteran larvae and algae communities between a fly ash deposit and a sandpit. We were lucky to collect all cages during one of the last warm and sunny days of this autumn. All cages seemed alright, as well as their inhabitants. Although Andrea is still preparing the preliminary results, it seems we will be able to perform the full experiment next year!
Robert, Yannick and Stepan (together with our close collaborators Petra Janečková, Jana Jersáková and Michael Bartoš) attended the 32nd Annual Meeting of the Scandinavian Association of Pollination Ecologists (SCAPE) held from Thursday 18 – Sunday 21 October 2018, in the beautiful Avon Ri Lakeshore Resort, Wicklow, Ireland. We have presented our fresh dataset from the upper elevations of Mount Cameroon: Rob introduced pollination networks, while Yannick focused on the role of floral traits in the interactions of plants and pollinators. The whole meeting had a very nice and friendly atmosphere and we are really glad to get into the international pollination community. We really enjoyed the conference with a lot of interesting talks, discussions, Irish beer and even Irish dancing.
During the last weekend, our group met in the Ruda field station. We welcomed several newcomers to our group (three new PhD students, one intern, check our Team page), the retreat programme was thus clear: to introduce each other and to socialise. In both, we succeeded! Each present group member presented her/his work, either previous or current. Simultaneously, Stepan introduced building of our new station in Buea, Cameroon. We also split for two trips: first part (mainly foreigners) visited fish harvest in the Rozmberk pond, the rest of us did the “traditional” hike to Vlkov village. Last but not least, we succeeded to finish a beer barrel, as well as a beer crate donated by Vincent by the lost bet. Altogether, the group retreat was successful and enjoyable and we are already looking forward to the next one!
During his previous master studies, Sylvain attended a two-weeks student expedition to Gabon, during which the students were systematically surveying local communities of moths. The collected material was partly identified and mostly barcoded and used for the survey of moth diversity in two different areas in Gabon. Few days ago, results of these survey have been published by the Genome journal, with Sylvain as the first author. Their results revealed how poorly known the Gabonese biodiversity is – for some groups, they found even more BINs (taxonomic units based on the genetic information only) than the known species richness from Gabon. Simultaneously, the paper also discuss differences between the sampled habitats and seasonal changes. Congratulations to Sylvain for his first first-authored paper!
Full citation: Delabye S. et al. (in press) Characterization and comparison of poorly known moth communities through DNA barcoding in two Afrotropical environments in Gabon. Genome.
We started the next part of our “post-industrial waters project” – an experimental transplant of selected organisms among fly ash deposits and post-mining sites. By moving selected species of arthropods and communities of algea among freshwater bodies, we want to explore how they flourish under differing levels of heavy metal pollution. Andrea Landeira-Dabarca from David Boukal’s group is responsible for these experiments and she has prepared the first pilot trial with zygopteran larvae, and both natural and laboratory communities of algea. Two weeks ago, the experimental cages (notice how carefully these were prepared by Andrea) were installed by the research team members. Andrea and Vojta Kolar have checked part of the algea transplants last week, it seems to work. We are going to check and collect all remaining cages in the coming week, a lot of curiosity and excitement how they work!
Our short note on competition between two abundant species of eusocial bees, Apis mellifera (honeybee) and Meliplebeia ogouensis, in the Bamenda Highlands, Cameroon, has just been published in the Sociobiology journal. Whilst studying foraging patterns of the twoo bee species, we observed relatively high partitioning of visited flowers among the two species. Both species are considered as generalists, but at least in the short term their floral preferences are specialised and almost do not overlap. However, these preferences change phenologically, as well well as inter-anually.
Full citation: Tropek R., Padyšáková E., Janeček Š. (2018) Floral resources partitioning by two co-occurring eusocial bees in an Afromontane landscape. Sociobiology 65: 527-530.