RT Journal Article
T1 Climatic amplitude is a predictor of geographic range size in Mexican morning glories (Ipomoea L., Convolvulaceae)
A1 Deloya Brito, Erick C.
A1 Clay, Cameron
A1 McIntyre, Patrick J.
A1 Piña de la Rosa, Itzel A.
A1 Scotland, Robert W.
A1 Muñoz Rodríguez, Pablo
A1 Cacho, N. Ivalu
AB Background: Elucidating the determinants of species’ geographic distributions is a fundamental goal of ecology and biogeography, as they can inform about key biological processes, with implications for conservation.Goal: Evaluate whether realized climatic amplitude (a proxy for niche breadth) is an ecological correlate of geographic range size in morning glories in Mexico, a highly diverse group of plants of worldwide socio-economic relevance, but still poorly studied.Methods: Based on a dataset of > 30,000 records of which > 7,000 were manually georeferenced, we calculated geographic range size (using convex hull polygons and buffered occurrence points), and climatic amplitude (using three first axes of Principal Components based on 19 Worldclim variables, and focusing on temperature, precipitation, and seasonality), and explored their relationship using general linear models and phylogenetic generalized least squares.Results: All models show that climatic amplitude explains a high proportion of variation in geographic range size for our dataset (up to > 69 %). We find no evidence of tradeoffs related to temperature and precipitation niche breadths. Through review of reported records, we update the number of species of Ipomoea reported for Mexico to 178.Conclusions: Much of the variation in geographic range size in Mexican Ipomoea can be explained by realized climatic amplitude, and this result is not driven by phylogenetic history. We discuss cases where despite large geographic range sizes, narrow climatic amplitudes can signify higher risks for species in the face of changing environments.
PB Sociedad Botánica de México
SN 2007-4298
YR 2023
FD 2023-09
LK https://hdl.handle.net/20.500.14352/121239
UL https://hdl.handle.net/20.500.14352/121239
LA eng
NO Deloya Brito EC, Clay C, McIntyre PJ, Piña-de La Rosa IA, Scotland RW, Muñoz-Rodríguez P, Cacho NI. Climatic amplitude is a predictor of geographic range size in Mexican morning glories (Ipomoea L., Convolvulaceae). Bot Sci 2023;101:1016–33. https://doi.org/10.17129/botsci.3322.
NO Funding  was  provided  by  UNAM’s  DGAPA-PAPIIT  program  (awards  IN213220  and IN220323  to  NIC)  through  projects  "Diversidad,  sistemática  y  evolución  de  camotes,  campanillas  y  cazahuates  (Ipomoea, Convolvulaceae), un enfoque integrativo, and Tendiendo puentes entre micro- y macroevolucióin: iden-tificando casos con alto potencial de especiación en Ipomoea, un clado diverso y poco estudiado".
NO Universidad Nacional Autónoma de México
DS Docta Complutense
RD 14 jun 2025