Insect Communities

Three new graduates in our group!

Last week, three of our students successfully completed their degrees at the Charles University. Dominik Anýž and Jan (Honza) Filip have been awarded by MSc degrees for their theses in pollination ecology at the Department of Ecology. Dominik has performed preliminary analyses on patterns in plant reproduction strategies along elevation in Afromontane grasslands on Mount Cameroon. Because of covid difficulties, his data have still not been final and we will finish the sampling in November. Honza’s thesis stayed in Czechia, as he focused on the role of hoverflies in pollination networks of the Železné hory Mts. Václav Koďousek has defended his BSc thesis at the Institute for Environmental Studies. In his BSc thesis, he has reviewed the available information on effect of fires on butterflies and moths. We are also extremely happy that all three will continue working with us, Václav as a Master’s student, whilst Dominik and Jan as our newest Ph.D. students. Congratulations to all of them, and best of luck for their journeys ahead!


2-years post-doctoral position in our group!!

For a project entitled Latitudinal patterns in specialization of pollination interactions: Metabarcoding of bee pollen loads along a cross-continental gradient, we are looking for a postdoctoral researcher (no more than 5 years after Ph.D. graduation) with a strong enthusiasm to answer interesting ecological questions by modern laboratory methods, who would spend two years (January 1st 2022 – December 31st 2023) in the Insect Community Ecology Group, with a possibility of extension till 2025. The postdoctoral project will be co-funded by the JUNIOR Fund ( of the Charles University, and by a project awarded to Dr. Robert Tropek (supervisor) by the Czech Science Foundation. !! Deadline 1st July !! (no possibility for extensions…). The complete call is here:

Sampling of plant-pollinator networks in Milovice

After many months of computer work, we have enjoyed almost the entire May in the field. We have started a large project recently supported by the Czech Science Foundation (Junior Star project, PI-ed by Rob), focused on latitudinal trends of plant-pollinator interactions as sampled at seven localities from South Africa to northern Norway. The pandemics has slightly postponed the project beginnng, so we have started in Czechia, in the adandoned military training area of Milovice, recently rewilded by European bisons, aurochs and wild horses (more details in Czech and some pictures here: Virtually the entire team has optimised all sampling protocols to get prepared for the future abroad localities. We have also sampled various data on pollination systems of ~40 currently flowering plant species, despite the ‘sub-optimal’ in many days, and the wild horses loving to play with our camera systems. It was very nice to be in the field, especially in such nice and diverse piece of nature!

Three new doctors in our group!

In the past two weeks, three of our members defended their Ph.D. theses! (Isn’t this some kind of record?!) First, Sylvain defended his thesis on biodiversity of Afrotropical butterflies and moths at the University of South Bohemia, Czechia. The next week, Mercy has defended her thesis on fruit-feeding butterflies on Mount Cameroon at the University of Buea, Cameroon. And just a few days later, Yannick defended his thesis on plant-pollinator interactions at the Charles University, Czechia. We all are very proud, all three theses brought a lot of interesting results and even more fun. Congratulations, Dr. Murkwe, Dr. Delabye and Dr. Klomberg!


New research sites in Krkonose montane grasslands

Štěpán and Antigone identifying flowering herbs.

As a conclusion to the busy month, a large part of our team (Rob, Stepan, Kobe, Antigone, Dominik and Sailee) spent the last week of June in the Krkonose mountains. We hiked along the ridge of the mountain range, looking for suitable areas to study pollination networks with the Czech Science Foundation (GAČR) project PI-ed by Rob. As opposed to our spring sampling in the semi-natural forests, we were scouting for natural grasslands above the timberline. All throughout (minus a foggy day), we hiked through beautiful landscapes and fair weather.With Stepan and Antigone proceeding at “botanical” pace, we spotted numerous interesting plant species, some of them endemic! Not surprisingly, there were plenty of insects too. Our trip has been highly successful, and we now have a few potential sites to choose from for our longer sampling sessions next summers!

Field courses for students in Czechia

June has been a rather busy month! We’ve been on and off field quite a bit, but we have also did some field teaching of ecology. In early June, Kobe and Sailee assisted with teaching a field course of the Department of Ecology, Charles University, for bachelor’s students in Lomy u Kunžaku, South Bohemia. Despite the frequent spells of rain, the students made the most of the course and learnt basic insect sampling techniques among other things. In mid-June, they also helped with a field course of the Plant-Animal Interactions lectures for MSc and PhD students of the University of South Bohemia in Holubov, South Bohemia. The more specific focus of the course helped students learn about pollination biology, ant-plant mutualisms and herbivory. Assisting with these courses has been rather rewarding to Kobe and Sailee; teaching concepts to students has helped reinforce ideas and notice gaps in understanding. We look forward to more of such opportunities!

Sailee (under Stepan’s supervision) is helping students to measure floral colours by a spectrometer during the field course.

Spring sampling in the Krkonoše Mts.

During May, our group (mainly Sailee, Kobe, Antigone and Eliska, but with a strong support of many others) resumed sampling in the Krkonoše Mts. in northern Czechia. We recorded floral visitors of plants in semi-natural forests along their altitudinal gradient. For comparability, we followed our protocol from Mount Cameroon. Having sampled lower elevations in the last year, we moved on to two higher elevations this spring. The fieldwork was interrupted by snow, which led to some mixed reactions from us. Fortunately the spring insects weren’t affected much, and we finished sampling successfully. Although we’ve got a lot of desk work ahead of us, our sampling in the forests of Krkonoše is complete!

Snapshots from Krkonoše: Some of the species we recorded, our study area, and our team.


Popularising of our research

Štěpán being interviewed in Krkonoše.

In the past months, our research has repeatedly appeared in media, especially in Český rozhlas Plus, the Czech public radio focused on science and society. Our last sampling trip to Kruger NP was accompanied by a journalist Ondřej Novák who recorded rich material. Mainly, it resulted in an episode of the Adventure of Science, a series specialised on international research of Czech Scientists. Some additional material from Kruger was used for three (1, 2, 3) episodes of the Natura broadcast dissecting particular aspects of our work, as well as biodiversity and protection of African savanna. Ondřej Novák also accompanied us to our fieldwork in Krkonoše where he recorded a long interview with Robert on ecological and evolutionary aspects of pollination interactions. Our research has appeared also in a broadcast on biological research in the Krkonoše NP. Last but not least, Robert also gave an interview on urban biodiversity in Prague, including its efficient protection. It is always fun for us to participate on popularising of ecological knowledge in media. (Unfortunately, all above-mentioned broadcasts and interviews are in Czech.)

Sampling in Kruger NP

Our team in the Kruger NP. © O. Novák

In late March, just before the covid lock-down, we have arrived from South African Kruger NP. Rob and Sylvain did the last sampling of insects for the large collaborative research on the role of large herbivores and water availability for savanna biodiversity. We were accompanied by Marketa Stankova setting bat recorders in our plots. This time, everything was smooth and without any problems and we brought a lot of material which will be processed in the next months. After sampling, we stayed in Skukuza and attended the Savanna Science Network Meeting. Sylvain presented his results from our previous project on moth diversity patterns along an environmental productivity gradient in south African savannas. Although our sampling in Kruger is already over, we are sure to find more opportunities to study insects in south African savanna.

New publication on a butterfly pollination system

Our case study of the butterfly pollinated Scadoxus cinnabarinus has just been published in the Arthropod-Plant Interactions journal. Our so far unique system of flowers video recording system was developed on a few case studies on the slopes of Mount Cameroon. The butterfly-pollinated S. cinnabarinus is the second one, which have just led to a publication. We (with Jan as the leading author) confirmed butterflies as the primary pollinators. However, they were supplemented by bees at the upper edge of its elevational range. Therefore, we show that even for particular species, the pollination syndrome concept is a useful tool to predict the primary pollinators. However, its predictability can be reduced under some conditions. We also discussed this should be considered in any large-scaled and multi-taxa studied. Check the paper, Jan prepared beautiful figures! And mainly check Jan’s “video abstract” on the studied pollination system below: