Johan Kjellberg Jensen

Researcher @lunduniversity working with urban ecology and nature connection

[Johan Kjellberg Jensen @JohanKJensen1]

Very happy that our new paper in TREE is out today! We call for a paradigm shift toward evidence-based urban greening. Cities are key battlegrounds in the fight against biodiversity loss, but current planning often falls short. We outline the scientific case and a way forward.

[Trends in Ecology & Evolution @Trends_Ecol_Evo]

Online now: Evidence-based urban greening: a missing piece in biodiversity conservation https://t.co/YNgMF93Iex

[Johan Kjellberg Jensen @JohanKJensen1]

How can we reconnect children with nature? Could bird feeding remedy the extinction of experience, and does urbanization affect it all?

Very excited about our new paper in @PaN_BES –some of the most rewarding research I’ve been part of!
@CarolineIsak

https://t.co/HHr0GsIHID

[Johan Kjellberg Jensen @JohanKJensen1]

6/6 #BOU2024 #Sesh6
Bird feeding can partly remedy nature disconnection but is context-dependent and needs guiding adults as role models. Children in areas w/ low socioeco status and local nature benefit the most: scientists can contribute through outreach and citizen science

[Johan Kjellberg Jensen @JohanKJensen1]

1/6 #BOU2024 #Sesh6
We often discuss the impact of anthropogenic food on birds, but what is the impact of bird feeding on people? Notions like the extinction of experience and pigeon paradox suggest we need to reconnect to nature, especially children growing up in cities

[Johan Kjellberg Jensen @JohanKJensen1]

5/6 #BOU2024 #Sesh6
Local greenspace positively impacted children’s self-assessed wellbeing and children with the least nature at home, showed better post-intervention species knowledge than average, effectively gaining more from bird feeding. Teachers had a pivotal role too

[Johan Kjellberg Jensen @JohanKJensen1]

It’s an honour being highlighted among all the amazing speakers - thank you for a great conference!

[Johan Kjellberg Jensen @JohanKJensen1]

6/6 #BOU2023 #Sesh5
In conclusion: NN trees support less food for breeding birds & city birds avoid them, and rightly so. Phenological mismatches in urban food webs remain to be explored and long-term studies of urban ecosystems are needed for general conclusions.

[Johan Kjellberg Jensen @JohanKJensen1]

1/6 #BOU2023 #Sesh5
Passerine birds tend to have fewer nestlings and nestlings that weigh less in cities. This is likely due less food in urban areas (caterpillars & spiders). Here, we looked at how urban vegetation possibly modulates this bottom-up effect

[Johan Kjellberg Jensen @JohanKJensen1]

5/6 #BOU2023 #Sesh5
So native trees are better for urban birds? Yes – but here phenology matters: native trees vary in their effects within and across years. So what constitutes a good territory changes with time; this means there’s a risk for phenological mismatches

[Andreas Nord @CyanistesNord]

Looking for a #postdoc interested in using genome editing to understand #temperature tolerance 🐤. Opportunity to write 2 yr joint proposal to join us @Biology_LU @lunduniversity. DL 15 April – email for info. Be great if you could RT. #postdocjobs #postdocposition #climatechange

[Johan Kjellberg Jensen @JohanKJensen1]

Our recent work inspired a poem and it made my entire week:

https://t.co/Rzl8GvZDeE

[Centre for Environmental and Climate Science, LU @cec_lund]

"Om man vill höra mer fågelkvitter på våren tror jag valet av stadsträd är en viktig faktor. Ökar man antalet inhemska arter i parker och grönområden kommer våra småfåglar sannolikt att trivas bättre." Läs mer om långtidsstudien av @JohanKJensen1 https://t.co/WWqSJ6XSqa

[Hannah Watson @hydrobates1]

Out now #OA in #Oecologia: non-native trees = lower occupancy & lower body mass in great tit chicks.
"Highlighted student research" led by @JohanKJensen1 with @JohanEkroos @Pablukas @CarolineIsak

#UrbanEcology #ornithology

https://t.co/A29YROyGj0

[Johan Kjellberg Jensen @JohanKJensen1]

How important are city trees to birds? Here, we took a look at the finer details of urban green space. Using tit breeding data, we found tree species effects vary within & between years, but nonnative trees were consistently negative. New paper out!

https://t.co/JsenLpMee7