Short-term fluctuating and long-term divergent selection on sympatric Monkeyflowers: insights from decade-spanning reciprocal transplants.

Autor:	Dong CM; Tulane University, Department of Ecology and Evolutionary Biology, New Orleans, LA.; Grinnell College, Department of Biology, Grinnell, IA., Rolón BA; Tulane University, Department of Ecology and Evolutionary Biology, New Orleans, LA., Sullivan JK; Tulane University, Department of Ecology and Evolutionary Biology, New Orleans, LA., Tataru D; Tulane University, Department of Ecology and Evolutionary Biology, New Orleans, LA., Deleon M; Tulane University, Department of Ecology and Evolutionary Biology, New Orleans, LA., Dennis R; Tulane University, Department of Ecology and Evolutionary Biology, New Orleans, LA., Dutton S; Tulane University, Department of Ecology and Evolutionary Biology, New Orleans, LA., Machado Perez FJ; Tulane University, Department of Ecology and Evolutionary Biology, New Orleans, LA.; University of California Merced, Life and Environmental Sciences Department, Merced, CA., Montano L; Tulane University, Department of Ecology and Evolutionary Biology, New Orleans, LA., Ferris KG; Tulane University, Department of Ecology and Evolutionary Biology, New Orleans, LA.
Jazyk:	angličtina
Zdroj:	BioRxiv : the preprint server for biology [bioRxiv] 2024 Sep 03. Date of Electronic Publication: 2024 Sep 03.
DOI:	10.1101/2024.06.26.600870
Abstrakt:	Sympatric species are often locally adapted to distinct microhabitats. However, temporal variation may cause local maladaptation and species boundary breakdown, especially during extreme climatic events leading to episodic selection. Repeated reciprocal transplants can reveal the interplay between short and long-term patterns of natural selection. To examine evolutionary trajectories of sympatric Monkeyflowers adapted to different niches, Mimulus guttatus and M. laciniatus , we performed three replicated transplants and combined them with previous experiments to leverage a dataset of five transplants spanning 10 years. We performed phenotypic selection analyses on parents and hybrids in parental habitats in Yosemite NP, CA during years of drastically differing snowpack. If there is ecological isolation, then we predicted divergent phenotypic selection between habitats in line with species' differences and local adaptation. We found interannual fluctuations in phenotypic selection, often in unpredicted directions. However, a combined-year analysis detected longer-term divergent selection on flowering time, a key temporally isolating and adaptative trait, suggesting that selection may reinforce species boundaries despite short-term fluctuations. Finally, we found temporal variation in local adaptation with M. laciniatus locally adapted in low snowpack years, while an extremely high snowpack year contributed to average local maladaptation of M. guttatus . Competing Interests: COMPETING INTERESTS None declared.
Databáze:	MEDLINE
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