Partial cutting in a dry temperate forest ecosystem alleviates growth loss under drought
نویسندگان
چکیده
The increasing frequency of severe drought and heat events under climate change is a major cause for concern forest productivity survival. One potential solution to improve resilience may involve tree removal reduce competition. To quantify benefits partial cutting systems drought, we use tree-ring data from long-term experiment in dry ecosystem western Canada, composed primarily mature interior Douglas-fir ( Pseudotsuga menziesii var. glauca ). We ask: (1) How does growth responses (2) how persistent are effects across multiple events? compare 83 trees up 400 years age eight treatment units randomized experimental design representing logging with 25% basal area retention control (100% retention). Retention harvesting was conducted winter 2002/2003 after moderate the summer 2002. site experienced more 2009 drought-heat event 2015. In 2020, obtained height diameter as well increment cores canopy dominant Douglas-fir, which were used derive increments. Based on these increments, calculated four indices drought. Growth increments remaining individuals substantially increased removal. Relative control, low expressed significantly higher post-drought compared 2002 2009, i.e., recovery. also had ability regain pre-drought levels droughts, resilience. However, did not show heat-drought Although response diminished over time, absolute residual remained than 17 harvest, despite repeated droughts. These results suggest that moisture-limited sites provides immediate medium term terms resilience, help forests adapt change.
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ژورنال
عنوان ژورنال: Frontiers in forests and global change
سال: 2022
ISSN: ['2624-893X']
DOI: https://doi.org/10.3389/ffgc.2022.761458