AI Article Synopsis
- Changes in flowering times due to climate change have led to longer flowering durations for plant species in central North America, averaging an increase of 11.5 days over the past century.
- Nearly all species studied (94%) showed greater overlap in their flowering periods, particularly in autumn, where late-season species have extended their blooming periods.
- This research highlights the significant impact of climate change on plant reproductive patterns, suggesting that the effects are more pronounced in certain seasons, like autumn.
Article Abstract
Changes to flowering phenology are a key response of plants to climate change. However, we know little about how these changes alter temporal patterns of reproductive overlap (i.e. phenological reassembly). We combined long-term field (1937-2012) and herbarium records (1850-2017) of 68 species in a flowering plant community in central North America and used a novel application of Bayesian quantile regression to estimate changes to flowering season length, altered richness and composition of co-flowering assemblages, and whether phenological shifts exhibit seasonal trends. Across the past century, phenological shifts increased species' flowering durations by 11.5 d on average, which resulted in 94% of species experiencing greater flowering overlap at the community level. Increases to co-flowering were particularly pronounced in autumn, driven by a greater tendency of late season species to shift the ending of flowering later and to increase flowering duration. Our results demonstrate that species-level phenological shifts can result in considerable phenological reassembly and highlight changes to flowering duration as a prominent, yet underappreciated, effect of climate change. The emergence of an autumn co-flowering mode emphasizes that these effects may be season-dependent.
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| http://dx.doi.org/10.1111/nph.19994 | DOI Listing |
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