Iranian shrublands are set to spread fast as climate warms
Hadinejad M, Naghipour AA, Ebrahimi A, Tarkesh Esfahani M, Naimi B
Climate Adaptation
If you garden in a dry climate or hike arid landscapes, this shows exactly how shrinking rainfall and rising heat can flip an entire landscape from grasses and wildflowers to scrubby, woody cover within a few decades.
Researchers used computer models to predict how plant communities in a dry region of central Iran will shift as the climate warms and rainfall declines. They found that woody shrubs are expected to spread into areas currently dominated by grasses and herbaceous plants, growing by roughly 27% over the next several decades. This kind of shrub takeover, called woody encroachment, can change soil, water, and wildlife patterns across an entire landscape.
Key Findings
Total woody plant communities are projected to expand by 26.86% ± 12.05% between 2050 and 2070 under three climate scenarios (SSP1-2.6, SSP2-4.5, SSP5-8.5).
Annual expansion rate of woody communities estimated at 0.45% ± 0.20% per year.
Annual precipitation was the top driver for shrub and herbaceous steppe communities, while maximum warm-month temperature and slope mainly shaped alpine and semi-desert vegetation.
chevron_right Technical Summary
Climate models predict woody shrubs will take over nearly 27% more land in central Iran's Zayandeh-Rud basin by 2070, pushing out grasses and herbs as the region gets hotter and drier.
Abstract Preview
Original paper
Plant community responses to climate change in the Zayandeh-Rud Basin, Iran: Does woody plant encroachment follow global patterns?
Arid and semi-arid ecosystems are highly sensitive to climate warming and drying, yet community-level responses in the Middle East remain poorly quantified. This study assesses the potential impact...
open_in_new Read full abstractAbstract copyright held by the original publisher.
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