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Valeria Evelín Campos

Valeria Evelín Campos
CIGEOBIO · CONICET-Universidad Nacional de San Juan

Dr. en Ciencias Biológicas

About

35
Publications
8,809
Reads
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409
Citations
Citations since 2016
9 Research Items
280 Citations
201620172018201920202021202201020304050
201620172018201920202021202201020304050
201620172018201920202021202201020304050
201620172018201920202021202201020304050
Additional affiliations
January 2007 - present
National Scientific and Technical Research Council
Position
  • Investigador Asistente

Publications

Publications (35)
Article
An important challenge is getting to know the condition of vegetation in dry woodlands, fragile ecosystems with high ecological value, to propose conservation strategies. Our objectives were: (1) to quantify on-the-ground vegetation composition and structure in dry Ramorinoa girolae-dominated woodlands on three study sites, using (A) field-based me...
Book
Full-text available
Un desierto puede parecer un vasto espacio vacío, pero hay mucha vida entre la arena y las rocas. Las plantas y animales pueden sobrevivir en este ambiente hostil, gracias a las adaptaciones que poseen para soportar el intenso calor durante el verano, el intenso frío en el invierno y la sequía. Las precipitaciones son escasas, la media anual de llu...
Article
Prosopis flexuosa (Fabaceae), a key species in desert environments, provides ecosystem services whereby it mitigates desertification and supports biodiversity conservation. To understand the relative importance of drivers of species diversity and structure of P. flexuosa-dominated woodland at different scales, we propose (1) to assess whether speci...
Article
Integrating field-based and remotely sensed data has proven valuable for assessing on-the-ground diversity of plants across a range of spatial scales. Here we assessed whether remotely sensed data is a good indicator of vegetation composition and structure in dry, Prosopis flexuosa-dominated woodlands. Our objectives were (1) to quantify on-the-gro...
Article
Full-text available
The effects of poaching on wildlife have been widely studied in conservation biology and can be heterogeneous, particularly on ungulates. These effects can be estimated through different methodologies whose use depends on several conditions such as Flight-initiation distance (FID). Our objectives were: 1- to evaluate whether poaching affects the FI...
Article
Full-text available
Dominant woody vegetation in arid ecosystems support different species of plants and animals largely dependent on the continued existence of these habitats for their survival. The chica (Ramorinoa girolae) is a woody leguminous tree endemic to central-western Argentina and categorized as vulnerable. We evaluated 1) richness of plants, birds and mam...
Article
Full-text available
The ecological function of animal seed dispersal depends on species interactions and can be affected by drivers such as the management interventions applied to protected areas. This study was conducted in two protected areas in the Monte Desert: a fenced reserve with grazing exclusion and absence of large native mammals (the Man and Biosphere Ñacuñ...
Article
Full-text available
Rocky habitats have a particular microclimate and a highly complex structure, providing sites that mammals can use as dens or as nesting sites to raise their young. The complex topography of these habitats also favors water retention, thereby promoting growth of plants. The viscacha rat (Octomys mimax; Rodentia, Octodontidae) is a rock-dwelling hys...
Article
Full-text available
QuestionsCan the species–environment relationship be understood using current remote sensing techniques? Can the derived indicators of remotely sensed data serve as a proxy for variables that affect habitat suitability of plant species? Which remote sensing predictors are best associated with woody species occurrence in a desert environment? How we...
Article
Full-text available
Identifying high-quality habitats across large areas is a central goal in biodiversity conservation. Remotely sensed data provide the opportunity to study different habitat characteristics (e.g., landscape topography, soil, vegetation cover, climatic factors) that are difficult to identify at high spatial and temporal resolution on the basis of fie...
Article
Full-text available
Abstract Exotic herbivores have detrimental effects on the ecosystems where they are introduced, at the level of plant communities and ecosystem processes. The native guanaco Lama guanicoe and the exotic feral donkey Equus asinus coexist in Ischigualasto Provincial Park. We quantified food availability in a plant community in the park during the we...
Conference Paper
Full-text available
In the framework of the National Law on Minimum Budgets for the Environmental Protection of Native Forests (2009), projects are being implemented in Argentina that point to native forest enrichment, restoration, conservation and sustainable use and management. The present project, entitled “Chica, retamo and algarrobo: umbrella species for conserva...
Article
Full-text available
The viscacha rat Octomys mimax is endemic to western Argentina; it inhabits lowland deserts and uses rocky crevices as resting sites. The aim of this study was to assess macrohabitat selection relative to the occurrence of rocky crevices and to evaluate seasonal variations in macrohabitats selected by this rodent in Ischigualasto Provincial Park,...
Article
Full-text available
The viscacha rat (Octomys mimax; Rodentia, Octodontidae) belongs to a monotypic genus endemic to western Argentina and inhabits lowland deserts with abundant rocks and ravines. Our objectives were 1) to determine the attributes of crevices (depth, height, width, entrance orientation, and rock color) that influence selection by the viscacha rat; 2)...
Article
Full-text available
The viscacha rat (Octomys mimax; Rodentia, Octodontidae) belongs to a monotypic genus endemic to western Argentina and inhabits lowland deserts with abundant rocks and ravines. Our objectives were 1) to determine the attributes of crevices (depth, height, width, entrance orientation, and rock color) that infl uence selection by the viscacha rat; 2)...
Article
Full-text available
Hoarding food is an important strategy of rodents in desert environments characterized by unpredict- able and poor food resource availability. In the Monte Desert, Prosopis produces abundant food, unevenly in time and space, in the form of pods and seeds. Sigmodontine rodents (Graomys griseoflavus,Akodon molinae, Eligmodontia typus and Calomys musc...
Conference Paper
Full-text available
Las especies de Prosopis son consideradas claves en los ecosistemas áridos y semiáridos por las numerosas interacciones que mantienen con el resto de los seres vivos y el ambiente físico. En el presente trabajo se hizo una revisión del papel de los animales en el consumo de propágulos de algarrobo y las consecuencias de esta relación en el ciclo de...
Chapter
Full-text available
The Central Bioceanic Corridor is a road that will link ports on the Pacific and Atlantic coasts. In Argentina, the road traverses the Ischigualasto Provincial Park, an arid ecosystem inhabited by endangered species. The Corridor will have effects owing to increased and new vehicle traffic along road sections within the Park and to higher use of th...
Article
Full-text available
The distribution and ecology of the pink fairy armadillo Chlamyphorus truncatus, the world's smallest armadillo, are poorly understood due largely to the strictly subterranean habits of this species. We compiled records from the literature, museum and private collections, information from rural people, and researchers to update the species' current...
Article
Full-text available
The fate of Prosopis flexuosa seeds dispersed by cattle is dependant on the spatial pattern of dung deposition and foraging movements. We hypothesised that cattle-use site classes explain the response variables related to seed input and fate of seeds, seedlings and saplings (small plants more than one year old). We defined sites with heavy cattle t...
Article
Full-text available
Habitat selection in deserts is mainly modulated by the availability of resources. The basic hypotheses regarding coexistence of species in arid environments offer two possibilities: 1) coexisting species partition available resources (each species acting as a specialist) and 2) generalists coexist with specialists because the former use habitats w...
Article
Full-text available
Octomys mimax O. Thomas, 1920, the viscacha rat, is a surface-dwelling rodent, endemic to the Monte biome of western Argentina. The genus Octomys is monotypic and represents a basal clade within the family Octodontidae. O. mimax is strictly herbivorous and is found in low-elevation arid environments characterized by galleries or rock formations. In...
Conference Paper
Full-text available
aim of this study is to describe the environment within the Monte where we located the species. This study was conduce in the Monte Desert of San Juan (Argentina) in four sites: -Matagusanos: mesquite woods (Prosopis flexuosa) and slimy clay soil;- El Leoncito: creosote bush scrub (Larrea nitida) and sandy silt soil; -La Cienaga: mesquite bush (P....
Article
Full-text available
Several rodent species engage in group living, meaning that individuals share nests, resting places, and range areas. Establishing how group living varies across species is critical for comparative studies to examine the origin and the adaptive value of this behavior. Comparative approaches are more powerful when a diverse array of taxonomic groups...
Article
Full-text available
Mammalian herbivores can play a role in the endozoochorous dispersal of Prosopis seeds in the arid zones of Argentina, and the introduction of exotic mammals can change relevant parameters of the plant's reproductive ecology. Our specific goals were to quantify the seeds of Prosopis flexuosa, P. chilensis and P. torquata contained in the faeces of...
Article
Full-text available
Nematode strains of the entomopathogenic family Steinernematidae differ in their ability to infect insects at different temperatures. Survival and infectivity of infective juveniles (IJs) of Steinernema rarum (OLI) were studied after their storage at 23+/-2 degrees C and at 5+/-1 degrees C. Survival at 23+/-2 degrees C was always above 95%. At 5+/-...

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Projects

Projects (9)
Project
En este proyecto proponemos evaluar la eficacia de la información derivada de sensores remotos, tanto pasivos como activos, como indicadores ecológicos de composición, estructura y funcionalidad de los bosques nativos de tierras secas en la provincia de San Juan. Poner a prueba la información satelital como una herramienta que permita conocer el estado actual de los bosques nativos será una importante contribución al proceso de Ordenamiento Territorial de los Bosques Nativos (OTBN) en nuestra provincia. Además, encontrar indicadores ecológicos, precisos y eficientes, obtenidos a partir de información derivada de sensores remotos, representa la línea de partida para establecer herramientas que permitan el monitoreo de los bosques nativos de tierras secas a largo plazo.
Project
En este proyecto proponemos evaluar la eficacia de la información derivada de sensores remotos, tanto pasivos como activos, como indicadores de composición, estructura y funcionalidad de los bosques nativos de tierras secas en la provincia de San Juan. Poner a prueba la información satelital como una herramienta que permita conocer el estado actual de los bosques nativos y realizar su monitoreo a lo largo del tiempo, será una importante contribución a la actualización del OTBN y a su categorización según su valor de conservación
Project
En Argentina, dentro del marco de la Ley de Bosques Nativos, las provincias deben “promover la conservación mediante el Ordenamiento Territorial de los Bosques Nativos y la regulación de la expansión de la frontera agropecuaria y de cualquier otro cambio de uso del suelo”, asignándoles a las áreas con bosques nativos diferentes categorías según su valor de conservación. Es por esto que el objetivo general es analizar los cambios espacio-temporales en la cobertura de bosques nativos, como consecuencia de cambios en el uso del territorio, en la provincia de San Juan. Además, poner a prueba la información provista por diferentes sensores remotos (pasivos y activos) para estimar indicadores de composición y estructura de estos bosques, que permitan su evaluación y seguimiento a lo largo del tiempo. Poner a prueba estas herramientas en los bosques de tierras secas constituye un importante desafío y un valioso aporte en la categorización de los bosques según su valor de conservación.