Paula Marchelli

Paula Marchelli
National Scientific and Technical Research Council | conicet · INTA Bariloche

PhD

About

163
Publications
12,135
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1,393
Citations
Citations since 2017
44 Research Items
601 Citations
2017201820192020202120222023050100150
2017201820192020202120222023050100150
2017201820192020202120222023050100150
2017201820192020202120222023050100150
Additional affiliations
October 1997 - present
October 1997 - present

Publications

Publications (163)
Article
Full-text available
Key message Nothofagus alpina (Poepp. et Endl.) Oerst. and Nothofagus obliqua (Mirb.) Oerst forests have strong fine-scale spatial genetic structures. The intensity of genetic structure patterns differed according to species, stand development stages, life stages, and spatial arrangement of regeneration groups. This data becomes useful for forest m...
Poster
En la Patagonia, los pastizales naturales son utilizados como fuente de alimento en la producción extensiva de animales domésticos. Ampliar el conocimiento sobre el comportamiento estacional de las pasturas de especies nativas que conforman estos ecosistemas, permitirá su aprovechamiento en los momentos de mayor calidad forrajera. En general, las e...
Chapter
Full-text available
Nothofagus are the dominant tree species in the Subantarctic Temperate Forests from Argentina and Chile. They are usually colonized by abundant and diverse ectomycorrhizae. Due to the considerable ecological and economic importance of Nothofagus and its ectomycorrhizae, several researchers have used different experimental approaches to study this s...
Poster
North Patagonian rangelands have been affected by desertification and overgrazing, leading to their deterioration and decreasing productivity. The strategies to mitigate these negative impacts include the domestication and breeding of key native species, such as Festuca pallescens (St. Yves) Parodi. This study aimed to characterize the relative per...
Poster
Los pastizales naturales de la Meseta de Somuncura, área provincial protegida y con endemismos, son vulnerables a cambios climáticos extremos. Festuca pallescens (coirón blanco) es una especie dominante e indicadora de calidad de pastizal. Con el objetivo de identificar plantas adaptadas a condiciones extremas, se tomaron muestras en la Meseta para...
Poster
En la Región Patagónica la ganadería extensiva con suplementación en períodos críticos, la baja cobertura vegetal del suelo y el efecto de vientos fuertes aumentan el riesgo de degradación de los pastizales, el principal recurso forrajero de la región. Con el objetivo de mejorar la productividad y la recuperación de pastizales, se trabaja en la dom...
Conference Paper
Full-text available
Palabras Clave: Nothofagus pumilio, diversidad genética, unidades de manejo operativo Videoposter: https://youtu.be/neMDTZIghTA Introducción Los cambios globales que se están suscitando, tanto climáticos como del uso de los recursos naturales, impactan en la persistencia y dinámica ecológica de los ecosistemas del mundo debido a la gran velocidad c...
Article
Full-text available
Key message Leaf pigment concentration varied among populations, watersheds and between two consecutive years. The highest concentration of pigments was found in 2018, but both years showed the same trend among populations. Physiological, morphological and phenological attributes are potentially adaptive traits that determine functional responses t...
Article
Full-text available
Significant gaps remain in understanding the response of plant reproduction to environmental change. This is partly because measuring reproduction in long-lived plants requires direct observation over many years and such datasets have rarely been made publicly available. Here we introduce MASTREE+, a dataset that collates reproductive time-series d...
Article
Genetic variation among host plants can influence herbivore behaviour and consequently their abundance, performance and environmental impact. In the Andean-Patagonian forest, the arboreal vegetation is dominated by species of genus Nothofagus. Previous studies of Nothofagus alpina demonstrated differences in genetic diversity among and within its p...
Article
Full-text available
The resistance of different genotypes to abiotic stress may be due to genetic effects and/or to phenotypic plasticity allowing them to acclimate to variable conditions. The contribution of one or the other mechanism determines different strategies with implications for the species conservation and adaptive management. In this study, the ecophysiolo...
Preprint
Full-text available
Physiological, morphological and phenological attributes are potentially adaptive traits that determine functional responses to certain environmental conditions. They are crucial for understanding adaptations to environmental variation along a species natural range. In particular, leaf pigment content can be a good proxy to the physiological and ph...
Article
Suillus luteus is a common ectomycorrhizal (EM) fungus associated with several Pinus species. It is distributed throughout the Northern Hemisphere and has been introduced into South America and New Zealand. We examined the genetic structure and population biology of S. luteus, which was introduced into Patagonian plantations with Pinus species in A...
Article
Full-text available
Sensitivity to water availability is a key physiological trait for grassland species located in arid and semiarid environments, where successful germination is closely related to rainfall dynamics. Festuca pallescens inhabits diverse environments along a steep precipitation gradient in North Patagonia, thus offering a suitable model for the study o...
Article
Full-text available
En planes de forestación, tanto con fines productivos como de conservación, la correcta elección de la fuente de semilla para utilizar es un factor clave. El área productora de semilla (APS) “Trevelin” de Nothofagus obliqua fue instalada en el año 1997 en la Estación Agroforestal de INTA Trevelin, provincia de Chubut. Esta APS está conformada por i...
Article
Full-text available
Global warming is predicted to exert negative impacts on plant growth due to the damaging effect of high temperatures on plant physiology. Revealing the genetic architecture underlying the heat stress response is therefore crucial for the development of conservation strategies, and for breeding heat-resistant plant genotypes. Here we investigated t...
Preprint
Full-text available
Global warming is predicted to exert negative impacts on plant growth due to the damaging effect of high temperatures on plant physiology. Revealing the genetic architecture underlying the heat stress response is therefore crucial for the development of conservation strategies, and for breeding heat-resistant plant genotypes. Here we investigated t...
Chapter
The Andean-Patagonian forests are the southernmost temperate forests in the world spreading over a thin strip at both sides of the Andes Mountains. This chapter introduces to a section of the book devoted to different species of these forests. Generalities and particularities of the Andean-Patagonian forests such as disturbs, endemisms, and drastic...
Book
Global climate change requires the development of programs that consider the active restoration of degraded forests and the use of native trees in afforestation to preserve the natural environment. International commitments like the UN REDD program, the Montréal Process and the Convention on Biological Diversity call for the breeding of species rar...
Chapter
Genetic resources from any biological organism-complete genomes, genes, or even portions of genes that have actual or potential relevance to humans—are a provisioning ecosystem service. They are essential to ensure the resilience and persistence of ecosystems and the process of evolution, and in this sense, conserving them is an ethical duty. Moreo...
Article
Full-text available
Patagonian forests are the southernmost temperate forests in the world, and Nothofagus pumilio is one of their most ecologically important tree species (i.e., a foundation species). It presents great adaptability and a wide distribution range, making it a suitable model for predicting the performance of trees facing global climate change. N. pumili...
Chapter
Planting native species requires particular genetic considerations in order to minimize the risks of maladaptation and genetic contamination. Outbreeding depression and genetic swamping are possible processes that should be avoided. Authenticity and functionality are two opposing objectives in active restoration of degraded ecosystems. Actual examp...
Chapter
Nothofagus pumilio and N. antarctica are main components of the Andean Patagonian Temperate forests that occur along all the environmental gradients that characterize the Patagonian region. In this chapter, their main botanical features and natural ranges are presented, as well as the state of the art in genetic studies. Phylogeographic patterns ba...
Chapter
Nothofagus obliqua forests in Argentina extend over a wide latitudinal gradient but highly fragmented and locally restricted. The relevance of this species relies in its high wood quality and tolerance to warmer niches, as those predicted under climate change. In this chapter, we describe the species characteristics and natural distribution range a...
Chapter
This chapter deals with two emblematic species of the Argentine forests: Araucaria araucana, a conifer with a restricted distribution area and considered a living fossil, and Salix humboldtiana, a willow with a continental distribution but the only native to this country and particularly threatened in Patagonia. Each species is presented in a separ...
Chapter
Raulí is an iconic species of the temperate sub-Antarctic forests due to its hardwood quality of pinkish tones. Because of its ecological and economic relevance, it is under conservation within national parks and being domesticated for plantation purposes. In this chapter, we present the state of the art of the species in Argentina. General feature...
Article
Understanding the impact of management on the dispersal potential of forest tree species is pivotal in the context of global change, given the implications of gene flow on species evolution. We aimed to determine the effect of logging on gene flow distances in two Nothofagus species from temperate Patagonian forests having high ecological relevance...
Article
Key message Past demographic changes and current selection pressures determine the genetic variation displayed by Nothofagus species along rainfall gradients. Based on the diversity trends observed at candidate genes associated to drought stress, we inferred a differential species’ adaptive potential. Context Clinal genetic variation in natural po...
Article
Phenological traits are crucial for understanding adaptation to climate change due to their genetic control and association with abiotic factors. However, few data on phenology patterns are available for South American Nothofagus species, in particular for Nothofagus alpina, a key species of the temperate forests of Patagonia. Therefore, our aim wa...
Article
Increasing global aridity combined with changing environmental conditions might cause irreparable alterations in arid and semiarid ecosystems. Knowledge of within-species genetic diversity and adaptive responses, especially along climatic gradients, becomes critical to inform management, conservation and restoration efforts. We combine the analysis...
Article
Seed germination is one of the earliest phenotypes expressed by plants, and the accuracy to germinate in the correct time and place is essential for plant population fitness. Cues that regulate germination have been exhaustively characterized in laboratory experiments. However, the way in which seed populations respond to these cues and the ecologi...
Article
Full-text available
In the quest to understand how biotic interactions respond to climate change, one area that remains poorly explored is how interactions involving organisms other than vascular plants will respond. However the interactions between plants and biological soil crusts (BSCs) are relevant in many ecosystems and they will likely respond uniquely to climat...
Poster
Los pastizales naturales de Patagonia Norte son el principal recurso forrajero para el ganado doméstico, actividad agropecuaria central en la región y sustento de una gran parte de la población rural. Estos pastizales presentan un alto grado de degradación el cual se ve acentuado en los últimos años por el impacto del cambio climático. La falta de...
Poster
Festuca pallescens es una forrajera nativa de gran interés productivo cuya distribución abarca una gran diversidad de ambientes y distintas áreas ecológicas en Patagonia. El objetivo de este trabajo fue obtener un conjunto de marcadores moleculares hipervariables del tipo microsatélites (SSRs e EST-SSRs) para ser usados en estudios de genética pobl...
Poster
Festuca pallescens es una especie nativa de gran valor forrajero que se distribuye en diversos ambientes en Patagonia. En principio, con el fin de evaluar la diversidad genética de esta especie a lo largo de un gradiente pluviométrico, se muestrearon 10 poblaciones desde Bariloche hasta la meseta de Somuncurá. Se realizó una caracterización prelimi...
Article
Full-text available
COIRÓN BLANCO: PRIMEROS PASOS EN LA DOMESTICACIÓN DE UNA ESPECIE CLAVE DE LOS PASTIZALES PATAGÓNICOS Los pastizales naturales son el principal componente forrajero en Patagonia Norte. La ganadería extensiva con suplementación en períodos críticos, la baja cobertura vegetal del suelo y el efecto del viento aumentan el riesgo de degradación de los pa...
Book
Full-text available
Este es un manual téorico-práctico que presenta una definición de Zonas Géneticas (ZG) para dos especies de amplia distribución en los Bosques Andino Patagónicos, como lo son lenga y ñire. Las ZG entendidas como unidades genéticas operativas, constituyen una herramienta valiosa en la promoción de la conservación y el manejo sustenable de los recurs...
Article
Full-text available
Peripheral sites usually offer suboptimal conditions for species with wide distributions, where expression of phenotypic variability and potential interspecific hybridization might be enhanced. The Patagonian steppe, the largest and southernmost dryland ecosystem in South America, is characterized by natural rangelands dominated by grasses. Festuca...
Article
Full-text available
We investigated the impact of past changes in habitat suitability on the current patterns of genetic diversity of two southern beeches (Nothofagus nervosa and Nothofagus obliqua) in their eastern fragmented range in Patagonian Argentina, and model likely future threats to their population genetic structure. Our goal was to develop a spatially-expli...
Chapter
Full-text available
El género Nothofagus cuenta en nuestro país con especies forestales del bosque templado andino-patagónico que son claves en los ecosistemas que integran, y que a la vez han sido y son aprovechadas por su madera y poseen una gran potencialidad para ser usados en plantaciones productivas. En sus cinco años de desarrollo, el Subprograma Nothofagus del...
Book
Full-text available
En este manual brindamos información sobre las bases para la definición de zonas genéticas en los bosques de raulí y roble pellín en Argentina y presentamos las zonas definidas en ambas especies con el fin de ser utilizadas como fuente de semilla segura y recomendada en acciones de plantación y restauración de sus bosques en Argentina. Asimismo, pr...
Article
Full-text available
Due to its overexploitation during the past century, Nothofagus nervosa is currently included in conservation and domestication programs, in which ectomycorrhizas play an important role. We aimed to describe the abundance and diversity of ectomycorrhizal fungi (EcMF) in both domesticated and naturally established N. nervosa specimens, and to analys...
Article
Full-text available
We present a set of 23 polymorphic nuclear microsatellite loci, 18 of which are identified for the first time within the riparian species Salix humboldtiana (Salicaceae) using next-generation sequencing. To characterize the 23 loci, up to 60 individuals were sampled and genotyped at each locus. The number of alleles ranged from two to eight, with a...
Article
The Patagonian region is characterized by a complex biogeographic history, with evidence of deep phylogeographic breaks shared among species. Of particular interest to conservation is the nature of colonization and settlement patterns after the last glacial period, including the detection of secondary contact between different lineages and/or hybri...
Article
Full-text available
The northernmost ‘robles’ of Argentina, located in Lagunas de Epulauquen (northwest Patagonia), are considered a population of Nothofagus obliqua, even though they differ in some respects from individuals of other populations of the species. In order to analyse a possible genetic basis of their distinctive character, we revised previous information...
Article
Full-text available
Habitat fragmentation might significantly affect mating and pollen dispersal patterns in plant populations, contributing to the decline of remnant populations. However, wind-pollinated species are able to disperse pollen at longer distances after opening of the canopy. Our objectives were to characterize the mating system parameters and to estimate...
Poster
Full-text available
En estudios de genética ecológica resulta de interés caracterizar los patrones de variación genética de poblaciones naturales en caracteres adaptativos, para lo que nos valemos de ensayos en los que medimos variables cuantitativas. En estos ensayos de especies aún no domesticadas se representan típicamente progenies resultantes de la polinización a...
Article
Development of appropriate forest conservation and management measures for a given tree species includes the identification of distinct genetically homogeneous units across its overall distribution range, which depends on the availability of knowledge on genetic, morphological and adaptive variation. This has important implications for germplasm tr...
Article
Full-text available
Mycorrhizas are mutualistic associations between soil fungi and plant roots which usually improve water and nutrient uptake, influencing plant fitness. Nothofagus nervosa (Raulí) is an ecologically and economically important species of South American temperate forests. Since this native tree species yields valuable timber, it was overexploited and...
Article
Full-text available
Background: Austrocedrus chilensis (D. Don) Pic. Ser. et Bizzarri commonly known as Patagonian cypress is a member of the Cupressaceae family, characterized by a high adaptive potential for growing in marginal areas and good timber quality. The species grows over a wide area and under a wide range of rainfall. This study assessed adaptive genetic v...
Article
Full-text available
The mating system (outcrossing, selfing, and biparental inbreeding) and the extent of pollen flow are two of the most important genetic features that determine the genetic structure of plant populations, and both are crucial for the design of conservation strategies. The objectives here were to estimate mating system parameters and to fit the polle...
Article
Full-text available
Background Nothofagus nervosa is one of the most emblematic native tree species of Patagonian temperate forests. Here, the shotgun RNA-sequencing (RNA-Seq) of the transcriptome of N. nervosa, including de novo assembly, functional annotation, and in silico discovery of potential molecular markers to support population and associations genetic studi...
Data
In silicoSSRs derived fromNothofagusleaf transcriptome (24,886 unigenes). The data describe the 3,821 SSR: Included are unigenes names, marker ID, Sequence Length (bp), SSR description (# SSRs per seq, repeat length, motif, # Repeats, SSR position (start, stop)), ORF definition (start, stop, SSR in ORF), primers description (sequence of forward and...
Data
KEGG Pathway maps. This table provides information on the enzymes putatively encoded by the RNA sequences, based on homology prediction and their associated pathways. This includes KEGG maps, enzyme names, and sequences ID.
Article
Full-text available
Water-use efficiency (WUE) is a physiological parameter that plays a significant role in the evolutionary dynamics of many forest tree species. It can be estimated indirectly through carbon isotope discrimination (Δ). In general, plants of more arid origins have lower values of Δ. In order to study the degree of genetic control of this parameter an...
Article
Full-text available
Nothofagus nervosa (Raulí) is a native tree species that yields valuable timber. It was overexploited in the past and is currently included in domestication and conservation programs. Several research programs have focused on the characterization of epiphytic microorganisms because it has been demonstrated that they can affect plant-pathogen intera...
Article
In phylogenetically related plant species, hybridization can influence their current genetic structure. Long-lasting hybridization may be related to persistence in shared glacial refugia, where the differential abilities of each species to survive could have provided adaptations to changing environmental conditions. In temperate South American fore...
Article
Full-text available
Cross-species amplification of microsatellites is a common procedure to obtain suitable markers to be used in population genetic studies. Primers designed for one (source) species are used to amplify homologous loci in related (target) species. It is expected that phylogenetically close species will share a higher proportion of markers, and genetic...
Article
Full-text available
Knowing the natural range of any species is essential to plan its conservation or use. The South-American beeches Raulí [Nothofagus alpina (Poepp. & Endl.) Oerst. = Nothofagus nervosa (Phil.) Dim. et Mil.] and Roble Pellín [Nothofagus obliqua (Mirb.) Oerst. ssp. obliqua] are two important forest tree species of the North Patagonian forests, and the...
Article
Full-text available
Natural distribution of Nothofagus alpina and Nothofagus obliqua (Nothofagaceae) in Argentina, two productively important tree species of the North Patagonian temperate forests. Knowing the natural range of any species is essential to plan its conservation or use. The South-American beeches Raulí [Nothofagus alpina (Poepp. & Endl.) Oerst. = Nothofa...