Incorporating Genetic Diversity to Optimize the Plant Conservation Network in the Third Pole

Global Change Biology, Journal Year: 2025, Volume and Issue: 31(3)

Published: March 1, 2025

Climate change poses a significant threat to the survival of many species. Although protected areas can slow down biodiversity loss, they often lack systematic planning and do not integrate genetic diversity. Genetic diversity is key prerequisite for species ability tolerate new conditions. Using population distribution data from 96 plant in Third Pole (encompassing Tibetan Plateau adjacent mountains), we mapped patterns diversity, projected climate-driven range dynamics future erosion, designed an optimal conservation framework region. We identified several patches high haplotype (HD), with relatively number haplotypes southeastern Pole. Regression models revealed that climate topography have interacted shape latitude precipitation being best predictors HD cpDNA nrDNA, respectively. Ecological niche modeling predicted approximate 43 km northwestward 86 m upward shift suitable habitats under scenarios, likely leading loss up 13.19% 15.49% nrDNA Alarmingly, 71.20% newly priority fall outside existing planned National Park Clusters. Therefore, recommend expanding network by 2.02 × 105 km2 (5.91%) Pole, increasing total conserved area 1.36 106 (39.93%) effectively preserve evolutionary potential plants. This study represents innovative attempt incorporate into efforts.

Language: Английский

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Effects of fruit size on seed germination in Psittacanthus mayanus (Loranthaceae)

Acta Botanica Mexicana, Journal Year: 2025, Volume and Issue: 132

Published: April 13, 2025

Background and Aims: Mistletoe seeds germinate readily after being removed from the exocarp by seed dispersers. While consequences of directed bird dispersal perspective mistletoe-bird mutualistic interactions are well-studied, effects fruit size variation on germination processes have received limited attention. Here we investigated different phases manually attached a Psittacanthus mistletoe, attachment to early haustorial formation, better understand process unit (embryo cotyledons). Methods: We collected fully developed ripe fruits mayanus (Loranthaceae) mistletoe plants growing Lysiloma divaricatum (Fabaceae) host trees, measured (length width length cupular pedicels), weighed, then used them in experiment. For this experiment, placed squashed wooden rectangle sticks, securing with their own viscin. Seeds were monitored daily for 100 days under common environmental conditions. Key results: showed high rate, completing just two weeks average. Germination was asynchronous among seeds, considerable time each took germinate. Among morphological characteristics evaluated, only significantly affected process. Specifically, influenced probability, they germinate, number cotyledons developed. wider higher probability but fewer cotyledons. Conclusions: Our findings suggest that could be an important trait influencing reproductive success species.

Language: Английский

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Patrones históricos y actuales de diversidad y relaciones biogeográficas de la avifauna residente de los bosques tropicales de México

Revista Mexicana de Biodiversidad, Journal Year: 2024, Volume and Issue: 95, P. e955341 - e955341

Published: March 4, 2024

Presentamos un análisis de la diversidad y los patrones biogeográficos 260 especies aves residentes bosques tropicales México, realizado a partir datos históricos (recolectados entre el siglo XVIII 2007) registros presencia última década (2013-2023). Realizamos comparaciones del número cambio composición especies, considerando las matrices distribución “histórica” “actual”, parsimonia endemismos. De acuerdo con históricos, mayor riqueza se localiza en vertiente Golfo México península Yucatán, mientras que estacionalmente secos costa Pacífico Cuenca Balsas presentaron valores más altos endémicas. Sin embargo, recopilados muestran una disminución significativa todas áreas analizadas. La estimación beta indicó elevados para evaluadas. hipótesis biogeográfica obtenida indica existencia 2 grandes grupos: i) pacífica ii) norte provincia Veracruzana, Istmo Tehuantepec Yucatán.

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The present and future for population genetics, species boundaries, biogeography and conservation

Botanical Journal of the Linnean Society, Journal Year: 2019, Volume and Issue: 191(3), P. 299 - 304

Published: Sept. 11, 2019

This issue of Botanical Journal the Linnean Society contains eight papers relating to population genetics and population/species interface. Based on genetics, morphometrics reproductive biology, several also focus application data conservation management. We take this opportunity present some our thoughts area research celebrate recent studies that have been published in journal elsewhere. To conserve biodiversity effectively, we first need know what exists, there is a clear role for systematic taxonomic circumscribing species identifying high priorities (e.g. Fay, 2018, references therein). Following from using 'traditional' next-generation techniques study delimitation (Reck-Kortmann et al., 2017; Contreras-Ortiz 2018; Hu Cortez 2019; Könyves, David & Culham, Martínez-Flores Zhong 2019), infraspecific taxonomy (Hardion Folk Tarieiev hybridization (Nakahama 2019) speciation (Escudero five delimitation, range techniques. Zhang al. (2019) use microsatellites clarify Asian Sibbaldia L. (Rosaceae), Feulner examining repeated evolution polyploids European Sorbus (= Pyrus s.l.). Carnicero investigate relationships between two subspecies Sardinian endemic Cymbalaria muelleri (Moris) A.Chev., basis amplified fragment length polymorphisms (AFLP), flow cytometry morphology, show one derived out other, leaving paraphyletic other. The other morphometrics, either alone (to Campanula Cabo Verde; Gardère or combination with Petunia Juss.; Freitas 2019).

Language: Английский

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Tracking Host Trees: The Phylogeography of EndemicPsittacanthus sonorae(Loranthaceae) Mistletoe in the Sonoran Desert

Journal of Heredity, Journal Year: 2018, Volume and Issue: 110(2), P. 229 - 246

Published: Nov. 26, 2018

The host dependence of mistletoes suggests that they track the distributions their hosts. However, factors determine geographic distribution are not well understood. In this study, phylogeography Psittacanthus sonorae was reconstructed by sequencing one nuclear (ITS) and two plastid (trnL-F atpB-rbcL) regions 148 plants from populations separated Sea Cortez. Divergence time gene flow were estimated to gain insight into historical demography structuring genetic variation. We also described mapped spatial suitable habitat occupied P. its most common Bursera microphylla in Sonoran Desert, along with responses Quaternary climate fluctuations using environmental data ecological niche modeling (ENM). detected differentiation between peninsular continental populations. Population divergence occurred during Pleistocene, around Last Glacial Maximum. No signals population growth detected, net moving continent peninsula. ENM models indicate decoupled mistletoe main past changes. For Interglacial present, produce only partial areas overlap on both peninsula continent. Our results support a scenario Late-Pleistocene isolation asymmetrical Continental migrated probably produced under different conditions.

Language: Английский

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Predicting future climate change impacts on the potential distribution of the black howler monkey (Alouatta pigra): an endangered arboreal primate

Environmental Monitoring and Assessment, Journal Year: 2024, Volume and Issue: 196(4)

Published: March 23, 2024

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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Modeling Future Potential Distribution of Buff-Bellied Hummingbird (Amazilia yucatanensis) Under Climate Change: Species vs. Subspecies

Tropical Conservation Science, Journal Year: 2021, Volume and Issue: 14

Published: Jan. 1, 2021

Global climate change is associated with changes in precipitation patterns and an increase extreme weather events, which might shift the geographic distribution of species. Despite importance this topic, information lacking for many species, particularly tropical birds. Here, we developed species models (SDMs) to evaluate future projections widespread Buff-bellied Hummingbird ( Amazilia yucatanensis) each recognized subspecies A. y. yucatanensis, cerviniventris, chalconota), under scenarios. Using SDMs current their potential four Representative Concentration Pathway (RCPs) years 2050 2070. We also calculated climatic niche breadth test relationship between area overlap. Future climate-change suggested a small but predicted range decreased chalconota remained unaffected cerviniventris. The cerviniventris contained part space yucatanensis chalconota, niches did not Our study highlights correctly choosing taxonomic unit be analyzed because will respond different manner change; therefore, conservation actions must consider intrinsic requirements environmental drivers that shape distributions.

Language: Английский

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Mitochondrial, morphological and environmental data partially support current subspecies designation inAmazilia yucatanensishummingbirds

Biological Journal of the Linnean Society, Journal Year: 2023, Volume and Issue: 138(4), P. 413 - 436

Published: March 6, 2023

Abstract Historical geological events and Pleistocene climatic fluctuations have played important roles in shaping distribution population differentiation across taxa. The buff-bellied hummingbird (Amazilia yucatanensis) is widely distributed along the Gulf of Mexico slope Yucatan Peninsula. Here, we obtained measurements sequenced two mitochondrial DNA fragments from currently recognized subspecies: Amazilia yucatanensis (YUC), cerviniventris (CER) chalconota (CHA). Additionally, tested for their genetic morphological differentiation, demographic expansion, palaeoclimatic niche overlap. Our results reveal between groups populations: (1) Peninsula to Veracruz (YUC+CER); (2) Tamaulipas Neutrality tests Bayesian skyline plots suggest past expansion without changes effective size over time. potential was fragmented at Trans-Mexican Volcanic Belt expanded northwards during Last Glacial Maximum Mid-Holocene current conditions. Niche overlap higher YUC CER. environmental space occupied by subspecies more similar each other than expected chance but significantly non-equivalent. provide new insight on this widespread species that fragmentation glaciations differences habitat a role recent diversification.

Language: Английский

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Genetic and Ecological Divergence of Cinnamon HummingbirdAmazilia rutila(Aves: Trochilidae) Continental Populations Separated by Geographical and Environmental Barriers

Tropical Conservation Science, Journal Year: 2023, Volume and Issue: 16

Published: Jan. 1, 2023

Background and Research Aims: Historical geological events climatic changes have played important roles in shaping population differentiation distribution within species. Amazilia rutila (Trochilidae) is a widespread hummingbird species the tropical dry forest along Pacific slope Yucatán Peninsula Mexico. Methods: We used mitochondrial DNA sequence, ecological niche modelling divergence tests to determine effects of major geographic barriers environmental variability on genetic A. continental populations. Results: Our results revealed three groups without haplotype sharing corresponding individuals/populations from W Isthmus Tehuantepec (PAC), Oaxaca Chiapas E (CHIS_OAX) those Guatemala (YUC). Values neutrality suggest past demographic expansion effective size over time, time since ranged between 39.4 84.45 ka BP. Each group differed their position space, with low-to-very limited overlap fundamental dimensions all analyzed, particularly YUC PAC. Analysis climate comparisons showed that space occupied by these mtDNA similar but not identical. Conclusion: conclude consistent model isolation geographical differences. Inferences about consequences underlying intraspecific evolutionary relationships await further study. Implications for Conservation: findings highlight importance preserving significant units this Conservation actions must consider intrinsic requirements evolutionarily distinct populations drivers shape distributions, maximizing preservation monitoring diversity.

Language: Английский

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