Summary
This review synthesises evidence that no-analog plant communities—compositionally distinct from any extant communities—arose frequently during late-glacial North America under novel climate conditions with high temperature seasonality. The author argues that similar no-analog communities will emerge by 2100 AD under IPCC emission scenarios, primarily in tropical and subtropical regions where climates will exceed modern global experience. The paper highlights a critical limitation: most ecological models are parameterised from modern observations and may fail under genuinely novel climatic conditions, necessitating urgently improved model robustness.
Regional applicability
The study focuses on North American palaeoecology and global climate projections, with primary concern for tropical and subtropical regions. UK applicability is limited; however, the conceptual challenge of ecological model uncertainty under novel climate conditions is relevant to United Kingdom climate adaptation and conservation planning, particularly for native woodland and grassland systems facing unprecedented temperature–precipitation combinations.
Key measures
Temporal and spatial distribution of no-analog plant communities; climate novelty indices; IPCC A2 and B1 emission scenario projections to 2100 AD
Outcomes reported
The study examined the historical occurrence of no-analog plant communities in late-glacial North America and projected their future emergence under climate change scenarios. It assessed the limitations of current ecological models in predicting species responses to novel climate conditions.
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