Genome-wide SNP data reveal recent population structure ofHuidobria fruticosa(Loasaceae), a paleo-endemic lineage from the Atacama Desert DOI Open Access
Felix F. Merklinger, Yichen Zheng, Tim Böhnert

et al.

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2023, Volume and Issue: unknown

Published: Dec. 4, 2023

ABSTRACT The Atacama Desert is a biodiversity hotspot of neo-endemic radiation, where long-term aridity and complex physiographic processes create unique environmental setting. Current species assemblages are mainly concentrated in highly patchy loma formations, plant populations occurring these often geographically isolated from each other. Despite general consensus on the Atacama, climatological geological evidence points to repeated climate change, making an ideal system for studying population genetic unstable habitats. We analyzing structure within between Huidobria fruticosa , paleo-endemic lineage Desert, shed new light its biogeographic history broaden our understanding evolution life extreme aridity, as well response changing environment. To do this, we analyzed SNP data genotyping-by-sequencing 354 individuals 21 populations. Our results suggest that, despite being ancient lineage, current only reflects abiotic conditions over last 2 million years. therefore conclude that present distribution, together with evolutionary documented here, result climatic fluctuations prolonged periods hyperaridity during Pleistocene. Building this understanding, findings contribute global narrative highlights interplay change dynamics, emphasize importance deserts living laboratories deciphering how have historically adapted some most habitats Earth.

Language: Английский

Composición de la flora vascular, delimitación y estado de conservación de lomas del cerro Ochiputur (Trujillo, Perú): alcances para la identificación y gestión de ecosistemas desérticos DOI Creative Commons
Norton Cuba‐Melly

Revista Mexicana de Biodiversidad, Journal Year: 2025, Volume and Issue: 96, P. e955408 - e955408

Published: Jan. 29, 2025

El desierto costero sudamericano es un ambiente de extrema aridez que recibe agua en forma neblina oceánica y precipitaciones discontinuas provistas por Niño-Oscilación del Sur (ENSO sus siglas inglés). Sus particulares condiciones climáticas geográficas son refugio especies flora, fauna altamente especializada, además poseer alto grado endemismo se encuentran amenazadas actividades humanas. Los objetivos presente estudio fueron: proponer una delimitación ecosistema lomas localidad norte Perú conocida como cerro Ochiputur usando herramientas teledetección el análisis Índice Vegetación Diferencial Normalizado (o NDVI su acrónimo inglés), efectuar línea base flora vascular e identificar impulsores cambio área estudio. permitió estimar la cobertura vegetal ecosistema, aunque aún presenta limitaciones, asimismo, evidencia influencia ENSO sobre avance antrópicas perjudiciales. Se registraron 134 plantas vasculares distribuidas 3 unidades paisaje lomas. Finalmente, discute conexión entre ecosistemas altoandinos, eficiencia desérticos.

Citations

0
Flora diversity survey and establishment of a plant DNA barcode database of Lomas ecosystems in Peru DOI Creative Commons
Feng Song, Yunfei Deng, Hai‐Fei Yan

et al.

Scientific Data, Journal Year: 2023, Volume and Issue: 10(1)

Published: May 19, 2023

Abstract Lomas formations or “fog oases” are islands of vegetation in the desert belt west coast South America, with a unique composition among world’s deserts. However, plant diversity and conservation studies have long been neglected, there exists severe gap DNA sequence information. To address lack information, we conducted field collections laboratory sequencing to establish barcode reference library plants from Peru. This database provides 1,207 specimens 3,129 barcodes data corresponding 16 locations Peru, during 2017 2018. will facilitate both rapid species identification basic on diversity, thereby enhancing our understanding flora’s temporal variation, providing valuable resources for conserving maintaining stability fragile ecosystems.

Language: Английский

Citations

5
Phenological and Fungal Interactions of Malesherbia auristipulata Ricardi (Passifloraceae) in the Atacama Desert: Adaptations and Conservation in an Extreme Ecosystem DOI Creative Commons
Germán Sepúlveda, Eliana Belmonte, Nicolas Valderrama Saez

et al.

Plants, Journal Year: 2024, Volume and Issue: 13(21), P. 3035 - 3035

Published: Oct. 30, 2024

is an endemic plant species of the Atacama Desert, with unique morphological and physiological adaptations. This research was conducted at Cuesta El Águila, Arica Parinacota Region, Chile. Adult juvenile plants were monitored, recording their growth, flowering, fruiting phases. Additionally, community identified. For study endophytic mycoflora, samples seeds, roots, stems, leaves collected, disinfected, cultivated in specific media. The isolated fungi analyzed morphologically molecularly, determining distribution different organs. diversity associated

Language: Английский

Citations

1
Climate change effects on Peruvian Lomas plant distribution DOI

Sofia Flores Vivar,

Sarah Bracke, Stef Haesen

et al.

Research Square (Research Square), Journal Year: 2024, Volume and Issue: unknown

Published: July 2, 2024

Abstract The Lomas ecosystem, situated along the arid coast of Peru, is a key refuge for biodiversity. vegetation has evolved diverse adaptive mechanisms to thrive in this unique environment, strongly influenced by fog masses during winter months while allowing growth dry season. However, climate change poses threat fragile ecosystem. Despite species’ resilience drought, changing rainfall patterns and soil moisture reduction from aridification have led population declines recent decades, affecting various taxa. Understanding changes habitat suitability species distribution crucial mitigating increased extinction risks due change. Urgent research needed comprehend these impacts on Peruvian Lomas, especially amidst urbanization growth, threatening their survival. In study, Species Distribution Models (SDMs) predicted plant within Andes regions under two future (SSP1-2.6 SSP3-7.0) scenarios. Both were expected experience suitability, with being most vulnerable, particularly SSP3-7.0 scenario. Endemic anticipated migrate upslope, utilizing adaptations, non-endemic might move downslope. High-elevation projected undergo larger range shifts, low-elevation could face more pronounced alterations, traits interactions. Due discontinuous systems coast, certain already threats that alter responses future. conservation efforts are necessary mitigate loss fragmentation’s vulnerable species, increasing desertification region.

Language: Английский

Citations

0
Generation of genomic resources and phylogenetic contributions in Oxalis from desert fog oases in Peru DOI
Leonardo Ronald Gaspar Caballero, Feng Song, Ning Fu

et al.

Journal of Systematics and Evolution, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 5, 2024

Abstract Several species in the genus Oxalis occupy Peruvian fog oases (Lomas) with a significant habitat‐adapted and endemic diversity. Acknowledging this aspect, is conceivable group for evolutionary biogeographic hypothesis testing; however, molecular resources still need improvement. We conducted genome skimming approach to assemble new plastomes from 18 accessions (six species) of collected Lomas locations Peru. These complete (several reported first time) present highly conserved composition. Our phylogenetic results were congruent previous section‐based backbone phylogenies Oxalis; closer look at phylogeny sect. Carnosae revealed nonmonophyletic arrangements involving megalorrhiza bulbocastanum individuals. also propose set three hypervariable plastid regions as potential markers. Likewise, an array primers nuclear simple sequence repeat markers based on most widely distributed species, O. megalorrhiza, listed evaluated their transferability other under examination. genomic represent development future population, phylogenetic, studies .

Language: Английский

Citations

0
Patterns of presence–absence variation of NLRs across populations of Solanum chilense are clade‐dependent and mainly shaped by past demographic history DOI Creative Commons
Gustavo A. Silva‐Arias, Edeline Gagnon,

Surya Hembrom

et al.

New Phytologist, Journal Year: 2024, Volume and Issue: unknown

Published: Nov. 24, 2024

Summary Understanding the evolution of pathogen resistance genes (nucleotide‐binding site‐leucine‐rich repeats, NLRs) within a species requires comprehensive examination factors that affect gene loss and gain. We present new reference genome Solanum chilense , which leads to an increased number more accurate annotation NLRs. Using target capture approach, we quantify presence–absence variation (PAV) NLR loci across 20 populations from different habitats. build rigorous pipeline validate identification PAV NLRs then show is larger than between populations, suggesting maintenance diversity linked population dynamics. The amount appears not be correlated with presence in clusters genome, but rather past demographic history species, diverging (smaller) at distribution edges. Finally, using redundancy analysis, find limited evidence being environmental gradients. Our results suggest random processes (genetic drift demography) weak positive selection for local adaptation shape single nucleotide polymorphism levels outcrossing plant high diversity.

Language: Английский

Citations

0
A new species of Diplostephium (Asteraceae, Astereae) from the Atacama Desert, Chile DOI Creative Commons
Sergio T. Ibáñez, Mélica Muñoz‐Schick, Rosa A. Scherson

et al.

PhytoKeys, Journal Year: 2022, Volume and Issue: 215, P. 51 - 63

Published: Dec. 13, 2022

A new species, Diplostephiumpaposanum S.T.Ibáñez & Muñoz-Schick, sp. nov., is described for Chile, extending the southern distribution of genus. Its position within genus was confirmed by morphological and molecular data, discussed here. The species found in a coastal environment, to genus, geographically far removed from other Chilean which are Andes. formation where it occurs, known as lomas, acts biodiversity refuge hyperarid environments. presence D.paposanum this environment contributes evidence floristic connection between Atacama Desert Neotropical Andes.ResumenSe describe una nueva especie para extendiendo la distribución austral del género. Su posición dentro género fue confirmada por datos morfológicos y moleculares, discutidos acá. La se encontró en un ambiente costero, nuevo el género, está geográficamente alejada de las otras especies chilenas, que son los formación donde habita, conocida como actúa refugio biodiversidad ambientes hiperáridos. presencia este contribuye evidencia conexión florística entre Desierto Andes Neotropicales.

Citations

2
Patterns of presence-absence variation of NLRs across populations ofSolanum chilenseare clade-dependent and mainly shaped by past demographic history DOI Creative Commons
Gustavo A. Silva‐Arias, Edeline Gagnon,

Surya Hembrom

et al.

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2023, Volume and Issue: unknown

Published: Oct. 17, 2023

Abstract Understanding the evolution of pathogen resistance genes (nucleotide-binding site-leucine-rich repeats, also known as NLRs) within a species requires comprehensive examination factors that affect gene loss and gain. We present new reference genome Solanum chilense , leads to an increased number more accurate annotation NLRs. Next, using target-capture approach, we quantify presence-absence variation (PAV) NLR loci across 20 populations from different habitats. build rigorous pipeline validate identification PAV NLRs, then show is larger than between populations, suggesting maintenance diversity linked population dynamics. Furthermore, amount not correlated with presence in clusters genome, but rather past demographic history species, NLRs diverging at distribution edges smaller sizes. Finally, redundancy analysis, find limited evidence being environmental gradients. Our results contradict classic assumptions important selective role for suggest driven by random processes (and weak selection) outcrossing plant high nucleotide diversity.

Language: Английский

Citations

0
Genome-wide SNP data reveal recent population structure ofHuidobria fruticosa(Loasaceae), a paleo-endemic lineage from the Atacama Desert DOI Open Access
Felix F. Merklinger, Yichen Zheng, Tim Böhnert

et al.

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2023, Volume and Issue: unknown

Published: Dec. 4, 2023

ABSTRACT The Atacama Desert is a biodiversity hotspot of neo-endemic radiation, where long-term aridity and complex physiographic processes create unique environmental setting. Current species assemblages are mainly concentrated in highly patchy loma formations, plant populations occurring these often geographically isolated from each other. Despite general consensus on the Atacama, climatological geological evidence points to repeated climate change, making an ideal system for studying population genetic unstable habitats. We analyzing structure within between Huidobria fruticosa , paleo-endemic lineage Desert, shed new light its biogeographic history broaden our understanding evolution life extreme aridity, as well response changing environment. To do this, we analyzed SNP data genotyping-by-sequencing 354 individuals 21 populations. Our results suggest that, despite being ancient lineage, current only reflects abiotic conditions over last 2 million years. therefore conclude that present distribution, together with evolutionary documented here, result climatic fluctuations prolonged periods hyperaridity during Pleistocene. Building this understanding, findings contribute global narrative highlights interplay change dynamics, emphasize importance deserts living laboratories deciphering how have historically adapted some most habitats Earth.

Language: Английский

Citations

0