Preliminary Study: Climate Adaptation in Bavarian Cities - Comparative Investigation on the Use of Non-Resident and Native Urban Tree Species

Titelbild von TP5. Blätter eines Laubbaumes mit Frasschäden.

The aim of this preliminary study is a comparison of the arthropod diversity of three native and closely-­related non-­resident tree species at an urban site.

In times of climate change, non-­resident tree species show a higher stress toler­ance, which in turn often leads to a higher vitality. This is the reason why they are also called ‘urban climate trees’.

At present, it is un­known how the stress tolerance of these species affects the commu­nities of inverte­brates that use the tree­tops, in­cluding herbi­vorous and plant-­suck­ing insects. The individuals in this commu­nity could be distributed relatively evenly among the exis­ting species; however, certain species could also be­come domi­nant, repro­duce massively and damage the tree or impair its function as a city tree. 

The study at hand thus aims at comparing urban climate trees and native trees regarding their vulner­­ability to pest infes­tation. This includes the character­ization of the canopy commu­nities. These data will also allow analysis of the extent to which non-­resident city trees contribute to sus­taining bio­diverse tree canopies.

Fieldwork of this study will be carried out within the frame­work of a master thesis in biology over one grow­ing season based on a screen­ing of the  bio­diversity of insect and arachnid species on native and non-­resident trees species of the climate change project „Urban Green 2021“ (funded by StMELF) in Wuerz­burg. Due to urban heat island (UHI) effects being intensi­fied by climate change, pre­dominately non-­resident trees will be planted in the future at urban street sites.

This pre­liminary study will be a start to establish a reliable database for a compara­tive evaluation of the bio­diversity of canopy inhabiting arthro­pods of native and non-­resident trees species. The results are meant to be used, for example, as infor­mation for environ­mental protection agencies and nature conservation asso­ciations as well as for recommen­dations to Bavarian munici­palities concer­ning the design and planning of climate tolerant green infra­structure.

The project is carried out jointly by the „Bavarian Institute for Viticulture and Horticulture” Veitshöch­heim (Dr. Susanne Böll) and the Bio­center of the Uni­versity of Wuerz­burg, Chair of Animal Ecology and Tropical Biology (Dr. Dieter Mahsberg).

Foto Gallery

Gefangene Insekten unter dem Mikroskop.
Eine Erzwespe in Vergrößerung.
Gelbtafel mit vielen gefangenen Insekten.
Bild von zwei Personen auf einem Hubsteiger in einer Baumkrone.
Eine Straße mit Alleebäumen.
Ein Karton mit Proben.
Eine Kamelhalsfliege in Vergrößerung.
(Photos: subproject 5)