Globally consistent climate sensitivity of natural disturbances across boreal and temperate forest ecosystems

Autor: Louis De Grandpré, Daniel Kneeshaw, Jane Uhd Jepsen, Philip J. Burton, Timo Kuuluvainen, Sylvie Gauthier, Mathieu Bouchard, Nadezhda Vladimirova, Per Angelstam, Kalev Jõgiste, Cornelius Senf, Rupert Seidl, Anthony R. Taylor, Akira Mori, Tuomas Aakala, Winslow D. Hansen, Deepa S. Pureswaran, Ekaterina Shorohova, Olga V. Lisitsyna, Alexey Aleinikov, Kobayashi Makoto, Floortje Vodde, Yan Boulanger, Elena Shubnitsina, Juha Honkaniemi
Přispěvatelé: Lehrstuhl für Ökosystemdynamik und Waldmanagement in Gebirgslandschaften, Department of Forest Sciences, Boreal forest dynamics and biodiversity research group, Forest Ecology and Management, Forest Economics, Business and Society
Rok vydání: 2020
Předmět:
Zdroj: Ecography
ISSN: 1600-0587
0906-7590
DOI: 10.1111/ecog.04995
Popis: Disturbance regimes are changing in forests across the world in response to global climate change. Despite the profound impacts of disturbances on ecosystem services and biodiversity, assessments of disturbances at the global scale remain scarce. Here, we analyzed natural disturbances in boreal and temperate forest ecosystems for the period 2001-2014, aiming to 1) quantify their within- and between-biome variation and 2) compare the climate sensitivity of disturbances across biomes. We studied 103 unmanaged forest landscapes with a total land area of 28.2 x 10(6) ha, distributed across five continents. A consistent and comprehensive quantification of disturbances was derived by combining satellite-based disturbance maps with local expert knowledge of disturbance agents. We used Gaussian finite mixture models to identify clusters of landscapes with similar disturbance activity as indicated by the percent forest area disturbed as well as the size, edge density and perimeter-area-ratio of disturbed patches. The climate sensitivity of disturbances was analyzed using Bayesian generalized linear mixed effect models and a globally consistent climate dataset. Within-biome variation in natural disturbances was high in both boreal and temperate biomes, and disturbance patterns did not vary systematically with latitude or biome. The emergent clusters of disturbance activity in the boreal zone were similar to those in the temperate zone, but boreal landscapes were more likely to experience high disturbance activity than their temperate counterparts. Across both biomes high disturbance activity was particularly associated with wildfire, and was consistently linked to years with warmer and drier than average conditions. Natural disturbances are a key driver of variability in boreal and temperate forest ecosystems, with high similarity in the disturbance patterns between both biomes. The universally high climate sensitivity of disturbances across boreal and temperate ecosystems indicates that future climate change could substantially increase disturbance activity.
Databáze: OpenAIRE
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