Old-growth beech forests in Germany as cool islands in a warming landscape

Research output: Journal contributionsJournal articlesResearchpeer-review

Authors

  • Yojana Adhikari
  • Nadine Bachstein
  • Charlotte Gohr
  • Jeanette S. Blumröder
  • Caroline Meier
  • Pierre L. Ibisch

The climate crisis seriously threatens Central European forests and their ecosystem functions. There are indications that old-growth forests are relatively resilient and efficient in micro-climatic regulation during extreme climatic conditions. This study evaluates five well-protected old beech forests in Germany, part of a UNESCO World Heritage Site. We examined temperature dynamics and vitality in core, buffer, and border zones during hot days from 2017 to 2023, using Landsat 8 and 9 imageries to assess Land Surface Temperature (LST) and Normalized Difference Vegetation Index (NDVI), alongside on-site Air Temperature (AT) measurements. Our findings reveal that all five forests were impacted by recent extreme heat events, with core zones remaining cooler and more vital, followed by buffer zones. Temperature-regulating patterns varied with landscape characteristics and the surrounding matrixes. We observed a site-dependent cooling effect of the forest interior that increased with higher LST. Our study highlights the value of old-growth forests and recommends increasing effective protection around mature forests, establishing corridors between isolated patches, and creating mosaics in managed landscapes that include unmanaged areas capable of developing into old-growth ecosystems.

Original languageEnglish
Article number30311
JournalScientific Reports
Volume14
Issue number1
Number of pages14
ISSN2045-2322
DOIs
Publication statusPublished - 05.12.2024

Bibliographical note

Publisher Copyright:
© The Author(s) 2024.

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