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No treeline shift despite climate change over the last 70 years

Titelangaben

Beloiu, Mirela ; Poursanidis, Dimitris ; Tsakirakis, Antonis ; Chrysoulakis, Nektarios ; Hoffmann, Samuel ; Lymberakis, Petros ; Barnias, Antonis ; Kienle, David ; Beierkuhnlein, Carl:
No treeline shift despite climate change over the last 70 years.
In: Forest Ecosystems. Bd. 9 (2022) . - 100002.
ISSN 2197-5620
DOI: https://doi.org/10.1016/j.fecs.2022.100002

Abstract

Background
The recent rise in temperature and shifting precipitation regimes threaten ecosystems around the globe to different degrees. Treelines are expected to respond to climate warming by shifting to higher elevations, but it is unclear whether they can track temperature changes. Here, we integrated high-resolution aerial imagery with local climatic and topographic characteristics to study the treeline dynamic from 1945 to 2015 on the semi-arid Mediterranean island of Crete, Greece.
Results
During the study period, the mean annual temperature at the treeline increased by 0.81 ​°C, while the average precipitation decreased by 170 ​mm. The treeline is characterized by a diffuse form, with trees growing on steep limestone slopes (>50°) and shallow soils. Moreover, the treeline elevation decreases with increasing distance from the coast and with aspect (south ​> ​north). Yet, we found no shift in the treeline over the past 70 years, despite an increase in temperature in all four study sites. However, the treeline elevation correlated strongly with topographic exposure to wind (R2 ​= ​0.74, p ​< ​0.001). Therefore, the temporal lag in treeline response to warming could be explained by a combination of topographic and microclimatic factors, such as the absence of a shelter effect and a decrease in moisture.
Conclusion
Although there was no treeline shift over the last 70 years, climate change has already started shifting the treeline altitudinal optimum. Consequently, the lack of climate-mediated migration at the treeline should raise concerns about the threats posed by warming, such as drought damages, and wildfire, especially in the Mediterranean region. Therefore, conservation management should discuss options and needs to support adaptive management.

Weitere Angaben

Publikationsform: Artikel in einer Zeitschrift
Begutachteter Beitrag: Ja
Keywords: Aerial imagery;Protected area; Continental island; Mediterranean region; High mountains; Temperature; Precipitation; Climate change; Forest dynamics
Institutionen der Universität: Fakultäten
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Geowissenschaften
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Geowissenschaften > Lehrstuhl Biogeographie
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Geowissenschaften > Lehrstuhl Biogeographie > Lehrstuhl Biogeographie - Univ.-Prof. Dr. Carl Beierkuhnlein
Forschungseinrichtungen
Forschungseinrichtungen > Zentrale wissenschaftliche Einrichtungen
Forschungseinrichtungen > Zentrale wissenschaftliche Einrichtungen > Bayreuther Zentrum für Ökologie und Umweltforschung - BayCEER
Graduierteneinrichtungen
Graduierteneinrichtungen > Elitenetzwerk Bayern
Graduierteneinrichtungen > Elitenetzwerk Bayern > Global Change Ecology
Titel an der UBT entstanden: Ja
Themengebiete aus DDC: 500 Naturwissenschaften und Mathematik > 550 Geowissenschaften, Geologie
500 Naturwissenschaften und Mathematik > 580 Pflanzen (Botanik)
Eingestellt am: 28 Feb 2022 08:40
Letzte Änderung: 06 Jun 2023 06:38
URI: https://eref.uni-bayreuth.de/id/eprint/68805