Climate change and ecological stability of the montane rainforest in the Sierra Maestra, Cuba
Keywords:
ecological functioning; ecological suitability; ecosystem resilience; ecological connectivity; habitat lossAbstract
Introduction: The montane rainforest of the Sierra Maestra is an ecosystem of high biodiversity and marked climatic sensitivity; its stability depends on specific thermal and hydric conditions, making climate change a critical threat to its persistence.
Objectives: To assess the impact of climate change on the distribution and ecological functionality of the montane rainforest, estimating the loss of suitable area under contrasting emission scenarios.
Methods: Ecological suitability areas were delineated using Sentinel‑2 imagery, 1970–2000 bioclimatic variables (WorldClim v2.1), and altitudinal analyses. The CanESM5‑CanOE and MIROC‑ES2L models were applied under SSP2‑6 (mitigation) and SSP5‑8.5 (high emission) scenarios for 2060 and 2100. Zonal statistics and spatial modeling were used to quantify changes in distribution and ecological functionality.
Results: For 2060, MIROC‑ES2L projects habitat losses of 32.6 % (SSP2‑6) and 49.9 % (SSP5‑8.5), while CanESM5‑CanOE estimates reductions of 53.1 % and 76.2 %. By 2100, contractions range from 28.8 % to 91.7 % (MIROC‑ES2L) and from 53.1 % to 99.1 % (CanESM5‑CanOE). The most severe losses are associated with temperature increases of 3.6°C and 5.4°C and precipitation declines of −301.2 mm and −515.8 mm under the high‑emission scenario for 2100. This altitudinal contraction compromises ecological connectivity, phenological cycles, and overall ecosystem functionality.
Conclusions: Climate change severely threatens the stability and ecological functioning of the montane rainforest; urgent adaptive conservation measures, ecological restoration, and climate monitoring are required to preserve its resilience under extreme scenarios.
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