Elevational shifts in tree community composition in the Brazilian Atlantic Forest related to climate change

Publikation: Beiträge in ZeitschriftenZeitschriftenaufsätzeForschungbegutachtet

Authors

  • Rodrigo Scarton Bergamin
  • Vinicius Augusto Galvao Bastazini
  • Adriane Esquivel-Muelbert
  • Kauane Maiara Bordin
  • Joice Klipel
  • Vanderlei Júlio Debastiani
  • Alexander Christian Vibrans
  • Rafael Loyola
  • Sandra Cristina Müller
Question: Climate change induces shifts in species distributions, ultimately changing community composition. Mountains are especially sensitive to climate change, and tree species are predicted to move towards higher elevations, but observed changes are not always unidirectional. The diversity and complexity of tropical and subtropical systems limits our understanding of climate-induced responses of subtropical mountain forests. Here, we investigated migration trends in tree community composition along an elevational gradient, and between the transition from lowland to montane
forests in subtropical forests.
Location: Brazilian Atlantic Forest.
Methods: We used thermal affiliations of 627 tree species to calculate community temperature scores (CTS) for different life-history stages of trees in 96 permanent plots. We compared CTS of different life-history stages across space and time.
Results: Most tree communities (58%) did not show a significant difference of CTS between life-history
stages, indicating a non-migration trend. On the other hand, 27% of tree communities showed upward migration and 15% downward migration. Upward
migration was more common in montane forests, and downward migration in lowland forests. Our temporal analysis shows significant changes in CTS values for juvenile communities with 0.36°C decrease in lowland forests and 0.34°C increase in montane
forests.
Conclusions: Contrasting results between lowland and montane forest communities indicate that the transition zone influences migration patterns and may reflect differences in species’ thermal limitations, as well as by non-thermal factors such as biotic
interactions. Our findings provide the first evidence of climate change-induced community shifts in the Brazilian Atlantic Forest. We demonstrated that upward migration trends were predominantly observed in montane–upper mountain forests, while downward migrations were noted in lowland–submontane forests. The thermophilization of montane forests may suggest an increased risk of reduction for cold-demanding species under climate change scenarios.
OriginalspracheEnglisch
Aufsatznummere13289
ZeitschriftJournal of Vegetation Science
Jahrgang35
Ausgabenummer4
Anzahl der Seiten10
ISSN1100-9233
DOIs
PublikationsstatusErschienen - 01.07.2024
Extern publiziertJa

Bibliographische Notiz

Publisher Copyright:
© 2024 The Author(s). Journal of Vegetation Science published by John Wiley & Sons Ltd on behalf of International Association for Vegetation Science.

    Fachgebiete

  • Ökosystemforschung - climate change, elevation gradient, forest dynamics, migration, subtropical forests, thermophilization

DOI

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