Past, present and future in the geographical distribution of Mexican Tepezmaite cycads: Genus Ceratozamia

PLoS ONE, Journal Year: 2024, Volume and Issue: 19(2), P. e0284007 - e0284007

Published: Feb. 8, 2024

Ceratozamia morettii , C . brevifrons and tenuis are cycads considered endangered in montane forests the center of Veracruz state. However, amount theoretical empirical information available on historical distribution these species how they could be affected future by effects climate change still needs to increased. Our objective was generate spatial since last glacial maximum, present, future. To map species, we created a potential model for each species. The data used models included 19 bioclimatic variables at maximum using two (CCSM4 MIROC), (2080) RCP 8.5 scenario (HadGEM2-CC MIROC5). We found that occupies unique ecoregion climatic niche. have similar pattern with an expansion their area larger present projected reduction under conditions. For also showed increase distributional maximum. this will continue conditions when reaches its area. Projections about endemic cycad show changes habitat, highlighting temperate zone ( ) face imminent extinction if no effort is made protect them. On other hand, tropical favored.

Language: Английский

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Altitudinal, latitudinal and longitudinal responses of cloud forest species to Quaternary glaciations in the northern Neotropics

Biological Journal of the Linnean Society, Journal Year: 2020, Volume and Issue: 130(3), P. 615 - 625

Published: April 30, 2020

Abstract The glaciations of the Quaternary caused changes in geographical distributions species associated with tropical montane cloud forests. most obvious effect glacial conditions was downward displacement forest species, thus giving opportunities for population connectivity lowlands. Considerable attention has been paid to these altitudinal changes, but latitudinal and longitudinal movements remain poorly understood northern Neotropics. Here, I use ecological niche modelling generate palaeodistributions small-eared shrews (Mammalia: Soricidae) closely forests mountain systems Mexico then retrodict their range shifts during Last Glacial Maximum (LGM), one coldest periods Quaternary. results suggest that not only migrated downwards response global cooling dryness also latitudinally longitudinally onto those slopes maintained moist (other remained unsuitable LGM), revealing a hitherto unknown route postglacial colonization species. This scenario past distributional change probably had genetic demographic implications repercussions identification areas refugia routes

Language: Английский

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Population structure in Neotropical plants: Integrating pollination biology, topography and climatic niches

Molecular Ecology, Journal Year: 2022, Volume and Issue: 31(8), P. 2264 - 2280

Published: Feb. 17, 2022

Animal pollinators mediate gene flow among plant populations, but in contrast to well-studied topographic and (Pleistocene) environmental isolating barriers, their impact on population genetic differentiation remains largely unexplored. Comparing how these multifarious factors drive microevolutionary histories is, however, crucial for better resolving macroevolutionary patterns of diversification. Here we combined genomic analyses with landscape genetics niche modelling across six related Neotropical species (424 individuals 33 localities) differing pollination strategy test the hypothesis that highly mobile (vertebrate) more effectively link isolated localities than less (bee) pollinators. We found consistently higher (F

Language: Английский

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The effect of climate change on Arcto‐Tertiary Mexican beech forests: Exploring their past, present, and future distribution

Ecology and Evolution, Journal Year: 2022, Volume and Issue: 12(8)

Published: Aug. 1, 2022

Martínez (Mexican beech) is an endangered Arcto-Tertiary Geoflora tree species that inhabit isolated and fragmented tropical montane cloud forests in eastern Mexico. Exploring past, present, future climate change effects on the distribution of Mexican beech involves study spatial ecology temporal patterns to develop conservation plans. These are key understanding niche conservatism other forest communities with similar environmental requirements. For this study, we used models by combining occurrence records, assess changes past (Last Glacial Maximum), present (1981-2010), (2040-2070) periods under two scenarios (SSP 3-7.0 & SSP 5-8.5). Next, determined habitat suitability priority areas as associated topography, land cover use, distance nearest town, variables. By considering during different scenarios, our estimated high-impact were restricted specific Sierra Madre Oriental constitute refugia from Last Maximum. Regrettably, results exhibited has decreased 71.3% since Maximum trend will for next 50 years, migrating at higher altitudes. This suggests states Hidalgo, Veracruz, Puebla preserve features ecological refugia, related high moisture north-facing slopes. difficult-to-access areas, proposed methods powerful tools relict-tree species, which deserve further conservation.

Language: Английский

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Vocal recognition suggests premating isolation between lineages of a lekking hummingbird

Behavioral Ecology, Journal Year: 2020, Volume and Issue: 31(4), P. 1046 - 1053

Published: April 25, 2020

Abstract Species with genetically differentiated allopatric populations commonly differ in phenotypic traits due to drift and/or selection, which can be important drivers of reproductive isolation. Wedge-tailed sabrewing (Campylopterus curvipennis) is a species complex composed three and acoustically lineages that correspond currently recognized subspecies Mexico: C. c. curvipennis (Sierra Madre Oriental), pampa (Yucatán Peninsula), excellens (Los Tuxtlas). Although taxonomically as distinct species, there genetic evidence have diverged from each other later than pampa. In this study, we experimentally tested song recognition major factor premating isolation for lineage recognition. To end, conducted playback experiment test whether territorial males one lek discriminate among potential competitors based on male songs the lineages. Males responded more aggressively their own excellens, most divergent pampa, evidenced by significant differences variety intensity latency response variables. This indicate does not represent competitive threat songs, divergence between these isolated However, acoustic limits might attenuated gene flow case secondary contact them, despite strong relatively rapid sexually selected traits.

Language: Английский

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A population genetics study of three native Mexican woody bamboo species of Guadua (Poaceae: Bambusoideae: Bambuseae: Guaduinae) using nuclear microsatellite markers

Botanical Sciences, Journal Year: 2021, Volume and Issue: 99(3), P. 542 - 559

Published: May 26, 2021

Background: Sporadic flowering contributes significantly to genetic diversity and connectivity among populations. Woody bamboos present sporadic or gregarious patterns with long cycles. In this study, we analyze the of three Guadua species distributed along Gulf Mexico slope that have different flowering. Questions: (1) Are genetically differentiated? (2) Does vulnerable G. inermis low levels diversity? (3) What is relative contribution geographic environmental factors structure ? Species studied: , amplexifolia tuxtlensis Study site dates: During 2014 2015, collected samples in Puebla southeastern Mexico, Veracruz Oaxaca, southern Veracruz. Methods: We successfully amplified five nine SSR markers, genotyped a total 155 samples. Results: The were differentiated. For found high population diversity, which are relatively higher than those other monocot species. Genetic differentiation was groups detected: north, central south. significant association between distances maximum temperature warmest month, but not distance. Conclusions: Our study first Mexican confirms their taxonomic identity. has strong structure, even when populations geographically close.

Language: Английский

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Phylogeography of the widespread white-eared hummingbird (Hylocharis leucotis): pre-glacial expansion and genetic differentiation of populations separated by the Isthmus of Tehuantepec

Biological Journal of the Linnean Society, Journal Year: 2020, Volume and Issue: 130(2), P. 247 - 267

Published: March 10, 2020

Abstract The Pleistocene glacial cycles had a strong influence on the demography and genetic structure of many species, particularly northern-latitude taxa. Here we studied phylogeography white-eared hummingbird (Hylocharis leucotis), widely distributed species highlands Mexico Central America. Analysis mitochondrial DNA (mtDNA) sequences was combined with ecological niche modelling (ENM) to infer demographic population differentiation scenarios under present past conditions. Analyses 108 samples from 11 geographic locations revealed among populations separated by Isthmus Tehuantepec (IT) Motagua-Polochic-Jocotán (MPJ) fault barriers. ENM predicted widespread distribution suitable habitat for H. leucotis since Last Inter Glacial (LIG), but this noticeably contracted fragmented at IT. Models historical dispersal corridors based genetics data existence west IT; however, connectivity across IT has changed little LIG. shallow either side isthmus star-like haplotype network, long-term persistence time potential routes, support scenario divergence migration subsequent isolation in Chiapas south MPJ fault. Our findings corroborate profound effects climatic fluctuations evolutionary history montane taxa challenge generality expanded (pine-oak forests) during cycles.

Language: Английский

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High genetic diversity but spatially restricted genetic connectivity in a tropical montane cloud forest tree (Magnolia schiedeana)

Tree Genetics & Genomes, Journal Year: 2022, Volume and Issue: 19(1)

Published: Dec. 6, 2022

Language: Английский

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The past is uncertain: alternative responses of cloud forest mammals to the Last Glacial Maximum in the Oaxacan Highlands, Mexico

Journal of Quaternary Science, Journal Year: 2024, Volume and Issue: 39(3), P. 386 - 396

Published: Feb. 7, 2024

ABSTRACT The Last Glacial Maximum (LGM; 26,000–19,000 years before the present) altered distribution of species worldwide. Its effect is poorly known in tropical regions because cooling and drought reached during that period are uncertain. Here, I generated hypotheses regarding possible responses cloud forest mammals Oaxacan Highlands (OH) Mexico, a region with one most extensive forests Neotropics. First, used three General Circulation Models (GCMs: CCSM3, MIROC‐ESM MPI) to characterize probable climates LGM. Then, ecological niche models estimate current LGM potential distributions four species. As other locations, results show GCMs consistent cooler conditions relative today; however, precipitation regimes notable variations region. MPI indicates could have been even wetter than present. Consequently, scenario allowed more widespread mammals. paleodistributions how mid‐ lowlands were essential for long‐term survival these ‘high‐mountain mammals’ throughout last glacial–interglacial cycle. presented here precise can be tested based on paleoecological genetic evidence.

Language: Английский

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Genetic differentiation among Psittacanthus rhynchanthus (Loranthaceae) populations: novel phylogeographic patterns in the Mesoamerican tropical lowlands

Plant Systematics and Evolution, Journal Year: 2020, Volume and Issue: 306(1)

Published: Feb. 1, 2020

Language: Английский

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