Emilia Hannula
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ehannula.bsky.social
Emilia Hannula
@ehannula.bsky.social
Soil ecologist. Fungi, networks, functions. Associate professor at Leiden University, Institute of Environmental Sciences. Mother of two.
The experiment is in plots (2 X 3m) and there is space between plots where the digger (and other things like mower) can move! We are continuing the experiment still for some time but the field will be ploughed in the end I think. Here you can see the plots and space between better!
September 29, 2025 at 6:53 AM
This week 120 soil intact soil cores were collected by Unifarm and PhD candidates Sophie and Robin from our field experiment on the effects of diversifying plant root traits in pastures on C budgets. The cores will be 13CO2 pulse labeled so that we can follow C through the system. #coolstuff #soils
September 26, 2025 at 2:02 PM
Last week we were with students on Schiermonnikkoog. Weather was quite extreme (rain and wind) but still had good mushroom excursions and soil sampling campaigns with engaged students! Exhausted but also inspired by my job and interactions it brings!
September 21, 2025 at 1:37 PM
Academic year is open! I want to wish all teachers and students an amazing year of learning about the topic but also about yourself! In the official opening of the year of @unileiden.bsky.social we heard a lot about detours in the path leading to self-development. I would also further argue that 1/2
September 2, 2025 at 7:17 AM
Ready for the new academic year with our brand new BSc programme (Science for Sustainable Societies) starting along with academic year on Monday. The holiday was great, and I got fully recharged looking for fungi, hiking with kids, fishing, eating blueberry pies, and meeting friends and relatives.
August 29, 2025 at 2:54 PM
Time to harvest some rucola! They were grown in different microbiomes (inocuated to common sterilized soil). Not to eat (this time) but to analyse microbiomes, metabolites and nutrients. #Soils2Guts #soils #harvesttime
August 7, 2025 at 2:11 PM
We are officially well into one of my favorite seasons: field work season. I do not get to do it often enough but sometimes I am still needed at least to show sampling locations (and take some soil samples...) and water plants.
July 28, 2025 at 9:38 AM
Legacy article from times @niooknaw.bsky.social on legacy of drought on soil fungal communities and functions. Key finding is that communities in bulk soil recover pretty fast while soil C related functions remain changed. Photos of the experiment for attention!

doi.org/10.1016/j.so...
July 17, 2025 at 10:19 AM
To have an impact on society, we need to work together. Our broad consortium (Reap2Sow) got funding from NWA-ORC to investigate the environmental and societal impacts and obstacles of transition from animal based protein to plant based protein. Looking forward to working together to make this happen
July 4, 2025 at 6:54 AM
Afterwards we celebrated the end of the lab work (for them) and start of the summer. Socks with fungi made everyone happy! Was a pleasure to have them in our group and wish them all success in the future!
July 1, 2025 at 9:50 AM
Yesterday we had 4 thesis presentations and a lovely soil group gathering! Esmee (Bsc) had looked at fungal CUE, Nio (Bsc) worked on fungal melanin and stress, Jacco (Msc) worked on fungal traits and interactions and Arman (Msc) on mycoviruses affecting soil functions. All did amazing (1/2)
July 1, 2025 at 9:50 AM
Happy 71st birthday @niooknaw.bsky.social and thanks for organising an event for alumni. Was nice to see sl many 'old' colleagues (and both of my PhD supervisors) and dance together. Hearing from panel of old directors was very insightful. South side to the win in the tug of war!
June 26, 2025 at 7:59 PM
Day 2 highlights were the session I chaired in the morning (especially talk by F. Van der Bom on root traits), climbing to a mountain with some grassland scientists, poster presented by PhD candidate S. Planchenault and the party held at the Scottish museum (with loads of dancing). #rhizosphere6
June 18, 2025 at 2:34 PM
Day 3 of #rhizosphere6 and conference fatigue would hit in if talks would not be this interesting. My highlights for today so far were talk by Claudia Knief showing their results on 11C/13C dual labeling, plenary by Ina Meier on hyphosphere and climate and Eva Oburger telling about root exudates.
June 18, 2025 at 2:28 PM
One castle in France, 40 (micro) soil scientists, 3 days. What is not to love! #microsoil was one of the best meetings I have ever been to. During the week talked about (microbial) death under the fig tree, pores (and non-excisting) aggregates and about persistence and stability of carbon. #soils
June 13, 2025 at 9:50 AM
Had the pleasure to attend 3 PhD defences in 3 weeks, 'working' in only one of them (hence the 📸 of walking to the hall). For others, as a colleague and co-author. Meanwhile, I have evaluated 3 more as a reader 😀 in the past weeks. Congrats to all new doctors (and all almost there!) #lovemyjob
June 3, 2025 at 3:03 PM
A review written by PhD candidate (when he was still a Msc student...) @stevendegoede.bsky.social on fungal induced soil aggregation mechanisms and its effects on soil C stocks. Publishing this was a long process, but hope this is helpful for all (especially early careers)!
doi.org/10.1093/isme...
May 13, 2025 at 8:57 AM
170(!!!) people representing provinces, cities, farmers, food growers, NGOs, health care organisations, chefs, etc. came together today to talk about soils. Such an amazing atmosphere and overwhelming interest in #soils. Isabel Siles-Asaff (CML) did a great job representing #soils2guts!
May 7, 2025 at 2:48 PM
Soil corer, my good old friend. Lovely day to go visit various PhD candidates doing fieldwork or preparing experiments (sending 950kg of soil to gamma-sterilization). Got to do some soil cores myself as well.
April 29, 2025 at 1:29 PM
Headed to Amsterdam today but not for the 'night before King's birthday' but to Aula of University of Amsterdam to attend the inauguration of Sahar El Aidy. She spoke so very philosophically about microbiomes and presented new theories. Truly enjoyed it.
April 25, 2025 at 4:19 PM
What was sad to see was a burnt down heathland. Caught on fire during military practice...
April 23, 2025 at 1:29 PM
My favourite season is here! Fieldwork season! The season when most ecologist get out from their offices to go sample and observe. A few weeks ago, we collected soil samples in the Veluwe region, and more will be collected in other parts in the coming weeks/months. #soils #fieldwork
April 23, 2025 at 1:27 PM
Joined today the protest against cuts in higher education and research in #Wageningen. 2000 people marched together from campus to the city center for speeches (including a speech by the mayor). #stopthecuts
April 14, 2025 at 11:57 AM
Yesterday, we organised the first-ever IBL-CML Leiden Soil Ecology event. Over 40 participants can not be wrong: soils are a hot topic in Leiden! From CML soil group PhD candidates Sophie, Isabel, and Ruiqi presented all their research lines. Well done! #soils
April 1, 2025 at 12:59 PM
This week has been hectic in terms of moving around Leiden. Each day, multiple locations (by bike). Seen Gorleaus, Sylvius, van Steenis, sports center (exam), library, Hortus, and 2 Rapenburg addresses. Pictures of today at B. thysiana to sample a fungus growing on >400y old book. #fungi
March 28, 2025 at 3:58 PM