Luciana Ghermandi

Luciana Ghermandi
National Scientific and Technical Research Council | conicet · INIBIOMA Instituto de Investigaciones en Biodiversidad y Medio Ambiente

PhD Biology

About

130
Publications
29,403
Reads
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1,652
Citations
Introduction
Grasslands dynamics, seed fire cues, subterranean rodents, wildland-urban interfase fires, pines invasions, N 95 masks reuse.
Additional affiliations
January 1999 - present
INIBIOMA (CONICET-UNIVERSIDAD DEL COMAHUE)
Position
  • Investigador Independiente
January 1999 - January 2017
National Scientific and Technical Research Council
Position
  • Researcher
January 1989 - present
National University of Comahue
Position
  • Senior Researcher

Publications

Publications (130)
Article
Fire intensity influences soil seed bank in fire‐prone environments. The aim was to study the effects of fire intensity on seed germination and seedling growth of native species which belong to three functional groups (grasses, shrubs, and fire ephemerals). We addressed the following questions: 1) How does fire intensity affect the seed germination...
Article
Full-text available
Wildland-urban interface (WUI) fires have increased in the last decades, putting lives and homes at risk, and fire hazard assessment is a useful tool to develop plans for prevention and fire management. In northwestern Patagonia, the WUI areas are principally located around the urbanized zones that are not only cities or towns but settlements surro...
Book
Full-text available
Introducción Esta introducción es intencionalmente informal. No voy a hacer una síntesis de lo ocurrido durante los tres intensos días que duró el evento, ni relataré ordenadamente como se generó la idea y como la pude concretar. Solo les contaré, los pondré al tanto, de episodios, cuestiones y anécdotas que me llamaron la atención. También daré al...
Article
Full-text available
Aim Soil and vegetation degradation are among the most serious consequences of overgrazed grasslands. Changes in vegetation may affect soil seed bank size and composition. We evaluated the contribution of the seed bank to recovery of the degraded grasslands. Methods The vegetation and seed bank of a degraded grassland and in a good condition grass...
Chapter
Achieving sustainable development is an urgent challenge for nations that not only must ensure the maintenance of the productivity of natural resources but also must know the environmental, economic, and social costs that their exploitation entails. The scarce knowledge and inadequate policies have diminished the capacity of ecosystems to sustain p...
Article
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QuestionsHow do fire frequency and fire size affect the long-term population dynamics of Mulinum spinosum? Which demographic parameters contribute most to the overall effect of fire on population growth? What is the relative importance of resprouting in sustaining population increase?LocationGrass-shrub northwestern Patagonian steppe, Argentina.Met...
Article
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The loss of the biodiversity is one of the consequences in the habitat fragmentation. The aim was to evaluate the effect of fragmentation on biodiversity. The MaxEnt v. 3.4.1 and Zonation v.4 software’s were used to the analysis. Three prioritization scenarios were analyzed according to: species richness, endemicity and both characteristics togethe...
Article
Full-text available
Fragmentation is a disruption in the connectivity of landscapes. The aims of this paper are (i) to quantitatively assess the fragmentation rates in three landscape units located in a hydrocarbon basin, and (ii) to model their behavior between 2001 and 2013 using landscape metrics at different scales of resolution. The following metrics were selecte...
Article
Full-text available
The Geography has provided the greatest theoretical body for the study of the configurations that occur over the geographical space. The generation of cartography that represents ground cover is one of the most important uses of remote sensing. Polygons were selected, with oil and livestock activity, in the landscape units: coastal canyons, plateau...
Article
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1. Increasingly, often ecologist collects data with nonlinear trends, heterogeneous variances, temporal correlation, and hierarchical structure. Nonlinear mixed‐effects models offer a flexible approach to such data, but the estimation and interpretation of these models present challenges, partly associated with the lack of worked examples in the ec...
Conference Paper
Full-text available
Introduction Long- term ecological monitoring is required for understanding population dynamics. Vegetation changes in arid and semi-arid ecosystems generally occur in the short- term in response to rainfalls and in the long-term in response to rare events (fires, volcanic eruptions). For developing management strategies for sustainable animal pro...
Article
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The facilitation mechanism maintains ecosystem richness by increasing seedling recruitment. Overgrazed grasslands of northwestern Patagonia are invaded by shrubs that could promote the seedling recruitment of forage species. We investigated the role of Acaena splendens shrubs on the maintenance of diversity and its usefulness as a nurse shrub in th...
Data
Frequency of maximum temperature and minimum humidity in the microsites of degraded grassland. (PDF)
Data
List of species in Acaena splendens nurse plants and in gaps. (PDF)
Article
Full-text available
Available remote sensing historical Landsat TM images allow identifying of first order effects of wildfires also in huge and inaccessible regions. In this paper the usefulness of the best known satellitederived severity indices was tested on a large wildfire occurred in January 1999 in a steppe of Northwestern Patagonia. The main objective of the w...
Article
Full-text available
Abstract: In this paper, we present and discuss the preliminary tools we devised for the automatic recognition of burnt areas and burn severity developed in the framework of the EU-funded SERV_FORFIRE project. The project is focused on the set up of operational services for fire monitoring and mitigation specifically devised for decision-makers and...
Article
Full-text available
In this paper, we present and discuss the preliminary tools we devised for the automatic recognition of burnt areas and burn severity developed in the framework of the EU-funded SERV_FORFIRE project. The project is focused on the set up of operational services for fire monitoring and mitigation specifically devised for decision-makers and planning...
Conference Paper
Full-text available
Estudios sobre el cambio climático global han postulado que éste originaría un aumento de los eventos extremos con considerables impactos en las sociedades y los sistemas naturales. A escala global no se observa una tendencia clara en el comportamiento de las precipitaciones a largo plazo, sin embargo, es factible observar algunos ejemplos de event...
Poster
Full-text available
INTRODUCCIÓN En los pastizales luego de un incendio la riqueza de especies aumenta por la aparición de hierbas fugitivas nativas. En el humo derivado de la combustión de la vegetación se encuentra un karrikinolide, que es el responsable de estimular la germinación de semillas de varias especies. Esta sustancia actúa a muy bajas concentraciones y ha...
Poster
Full-text available
INTRODUCCIÓN La cría del ganado es la principal actividad económica de los pastizales semiáridos del noroeste patagónico que se ha realizado desde el inicio del siglo pasado sin controlar la capacidad de carga del ecosistema. Como consecuencia se han producidos el sobrepastoreo y deterioro de grandes áreas en las cuales disminuyó la diversidad de p...
Poster
Full-text available
El humo, derivado de la combustión de plantas puede estimular la germinación de ciertas especies asociadas a ambientes propensos al fuego. Nicotiana linearis es una herbácea fugitiva muy abundante en el postfuego temprano de los pastizales del noroeste patagónico. El objetivo fue estudiar el efecto del humo líquido en la germinación de semillas de...
Conference Paper
Full-text available
Los pastizales pueden ser invadidos por arbustos alterándose la oferta de servicios ambientales como la biodiversidad y la disponibilidad de forraje. En general, el fuego controla los arbustos aunque algunas especies son favorecidas por los incendios. En el noroeste de la Patagonia los matorrales mono-específicos de Fabiana imbricata contribuyen a...
Article
Full-text available
In the Argentinean Patagonia, the main driving forces of degradation are the extractive activities (oil and mining) and sheep ranching. Determine the ability of spectral indices to predict the spatial variability of structural and functional attributes of arid ecosystems would help to identify patterns associated with desertification or passive res...
Article
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En la región patagónica Argentina, las principales fuerzas directrices de la degradación son las actividades extractivas (petrolera y minera) y la ganadería ovina extensiva. Evaluar la capacidad de los índices espectrales para predecir la variabilidad espacial de los atributos estructurales y funcionales en ecosistemas áridos permite identificar pa...
Research
Full-text available
Leaf-cutting ants are the gardeners of the insect world, cultivating fungus on the leaf pieces they bring back to the nest. And like their human counterparts, the ants have to deal with garden waste. After they harvest and feed the fungus to the colony, leaf-cutters often discard the organic debris in piles.
Conference Paper
Full-text available
El contenido de humedad de la vegetación es un parámetro crítico en la evaluación del peligro de incendios. Si bien se ha avanzado en comprender su rol en el comportamiento del fuego y en su estimación por teledetección, poco esfuerzo se ha dedicado a modelar su variabilidad temporal y espacial. Nuestro objetivo fue modelar la dinámica del contenid...
Conference Paper
Full-text available
Resumen: El contenido de humedad de la vegetación es un parámetro crítico en la evaluación del peligro de incendios. Si bien se ha avanzado en comprender su rol en el comportamiento del fuego y en su estimación por teledetección, poco esfuerzo se ha dedicado a modelar su variabilidad temporal y espacial. Nuestro objetivo fue modelar la dinámica del...
Article
The overlapping zone between urbanization and wildland vegetation, known as the wildland urban interface (WUI), is often at high risk of wildfire. Human activities increase the likelihood of wildfires, which can have disastrous consequences for property and land use, and can pose a serious threat to lives. Fire hazard assessments depend strongly on...
Article
Full-text available
Fire is one of the most important disturbances in terrestrial ecosystems and has major ecological and socioeconomic impacts. Fire regime describes the variation of individual fire events in time and space. Few studies have characterised the fire regime in grasslands in spite of the importance of these ecosystems. The aim of this study was to descri...
Technical Report
Full-text available
Article
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Livestock can affect the soil seed bank through various mechanisms associated with changes in vegetation. We sampled vegetation and seed banks of Patagonian grasslands, in areas with different historical use by grazing (exclosure, moderate use and high use) to evaluate to what extent changes in vegetation are reflected in the seed bank. We also eva...
Conference Paper
Full-text available
In Patagonia, degradation processes are given and caused by the oil industry and extensive sheep farming. The aim was perform a comparative analysis between the vegetation indexes (VI) with EFA (Ecosystem Function Analysis), indicators biophysical to monitor changes in landscape degradation. The Normalized Difference Vegetation Index (NDVI), the Gr...
Technical Report
Full-text available
Los objetivos del Estudio Describir el emprendimiento Delimitar y describir el medio sobre el que tendrá efectos el proyecto (el área depende del componente estudiado). LINEA DE BASE. Reconocer y valorar los efectos generados por las acciones del proyecto sobre el ambiente. IMPACTOS. Recomendar medidas mitigadoras, correctoras y/o compensatorias...
Article
Full-text available
Variation in fire intensity affects the post-fire survival and growth of shrubs. We examined effects of maximum fire temperature (a proxy for fire intensity) on the survival, growth and reproductive performance of the shrubs Mulinum spinosum and Senecio bracteolatus at 1 and 2 years post-fire in northwest Patagonian grasslands. We applied two fire...
Chapter
Full-text available
CAPíTULO Nuestro entorno no fue siempre como lo vemos ahora… ¿Por qué? ¿Cómo cambia? ¿Cambian las especies? ¿Cambia el ambiente? La interacción entre especies y su ambiente conduce a cambios, a veces graduales, a veces drásticos, que modifican el paisaje cons-tantemente. Desde la ecología moderna se interpreta que las per-turbaciones en un ambiente...
Conference Paper
Full-text available
Fire recurrently affects many of the terrestrial ecosystems causing major implications on the structure and dynamics of vegetation. In fire prone, it is particularly important to know the fire regime for which precise fire records are needed. Dendroecology offers the possibility of obtaining fire occurrence data from woody species and has been wide...
Article
Full-text available
The cosmopolitan herb Rumex acetosella forms persistent soil seed banks and increases in cover after fire. We investigated how the interaction between seed age and fire affects seedling growth by exposing different-aged seeds to heat, smoke, charcoal, and ash treatments. We measured growth of germinated seedlings that were transplanted and allowed...
Article
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Post-fire recovery of perennial plants depends on their capacity to regrow from surviving meristems. Plants are adapted to a particular fire regime, which can be altered by human activities and climatic change. Therefore, predicting the impact of changing fire regimes on post-fire vegetation recovery has become a major ecological concern. We studie...
Conference Paper
Full-text available
Landscapes are dynamic in space and time, being spatio-temporal processes of particular interest for landscape ecology. In particular, grasslands can change their structure through the expansion of shrubs in the landscape matrix. Shrub encroachment affect biodiversity as well as forage availability that is the key component of the productive use of...
Article
Full-text available
One strategy of plant survival during post-fire succession is to persist and regenerate by recruiting new individuals from a fire-resistant seed bank. The heat, smoke, and charcoal released during plant combustion may act (individually or in combination) as a cue for post-fire seed germination. Fabiana imbricata is a shrub that forms persistent see...
Article
Full-text available
In Mediterranean ecosystems, fire influences plant population dynamics and changes plant community structure by affecting germination and establishment of seeder shrubs. Fabiana imbricata is a long-lived seeder shrub with a broad distribution in South America. In Northwestern Patagonia grasslands there are many records of F. imbricata recruitment a...
Article
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Fire severity influences the recovery and biodiversity of plant communities. We compared the early post-fire recovery of plant functional groups in two sites (one burnt with high severity and one with low severity) in the northwestern Patagonian steppe.We sampled the post-fire soil seed banks, as well as the composition and cover of aboveground pla...
Thesis
Full-text available
Recuperación de la vegetación en Laguna Blanca http://revistas.unlp.edu.ar/index.php/domus/issue/current/showToc Efecto de clausuras de ganado sobre la vegetación en el Parque Nacional Laguna Blanca Effect of livestock exclosures on vegetation in Laguna Blanca National Park ABSTRACT We studied vegetation recovery in 10 plots (each of 2500 m 2) insi...
Conference Paper
Full-text available
Recuperación de la vegetación en Laguna Blanca http://revistas.unlp.edu.ar/index.php/domus/issue/current/showToc Efecto de clausuras de ganado sobre la vegetación en el Parque Nacional Laguna Blanca Effect of livestock exclosures on vegetation in Laguna Blanca National Park ABSTRACT We studied vegetation recovery in 10 plots (each of 2500 m 2) insi...
Conference Paper
Full-text available
Fire is one of the most important disturbances on the Earth affecting most terrestrial ecosystems. Evidence suggests that since the last glaciations there has been a substantial interaction among climate, vegetation and fire. In fact fire is recognized as an emergent property of climate and vegetation type, which determine that distinct regions are...
Article
Full-text available
There are two main methods for estimating seed density and species composition of soil seed banks: manual seed extraction and seedling emergence. These methods were used to determine and compare seed density and species composition in the soil of a natural grassland in Patagonia. Additionally, known amounts of seeds of different sizes from Patagoni...
Article
Full-text available
Postfire recruitment of seedlings has been attributed to a stimulation of germination by fire-related cues. The germination response to heat shock (80 °C - 5 min), smoke (60 min), the combination of both factors and no heat no smoke (control) was studied in six native species (two dominant grasses, two dominant shrubs and two annual fugitive herbs)...
Article
Full-text available
Rumex acetosella es una hierba exótica perenne que invade los claros (i.e., área entre los pastos perennes dominantes) de los pastizales del NO de la Patagonia. El objetivo de este trabajo fue estimar su grado de invasión y relacionar las variaciones de su cobertura con las características de la vegetación de los claros en comunidades dominadas por...
Article
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El complejo volcánico Cordón Caulle, ubicado en la Cordillera de los Andes (Chile), hizo erupción en junio de 2011 y desde entonces ha estado emitiendo -con diferente intensidad- cenizas que los vientos dominantes han depositado en la Patagonia argentina. En este trabajo presentamos resultados sobre la cantidad de ceniza depositada en los claros en...
Article
Full-text available
Rumex acetosella is an exotic perennial herb that invades grassland gaps (i.e., area between tussock grasses) at NW Patagonia. The aim of this study was to estimate the degree of invasion of R. acetosella and to relate cover fluctuations to gap vegetation characteristics in communities dominated by Pappostipa speciosa (ex Stipa speciosa) and commun...
Article
Full-text available
The Cordón Caulle volcanic complex, located in the Andes (Chile), have erupted in June 2011, and has has been emitting ash with different intensity since then, that the dominant winds have deposited in the Argentinean Patagonia. Here we quantied the amount of deposited ash in the gaps between the vegetation of northwestern Patagonia steppe in order...
Article
Full-text available
Shrub encroachment is the advance of woody plants over grasslands. For some shrub species this process is favoured by fire and high precipitation. In northwestern Patagonia spring precipitation is related with the El Niño Southern Oscillation (ENSO). Over the past years, ENSO has shown an increase in both amplitude and frequency. Our study focuses...
Article
Full-text available
In many regions of the world, fires are primarily of anthropogenic origin. In northwestern Patagonia, the number of fires is not correlated with meteorological variables, but is concentrated in urban areas. This study was conducted in the wildland-urban interface (WUI) area of San Carlos de Bariloche (Patagonia, Argentina), within the Nahuel Huapi...
Article
Full-text available
Fire is a non-selective disturbance that impacts equally plant species that could be selected differentially by livestock. Post-fire recruitment dynamics is an important ecological process that has been barely studied in Patagonian grass species. This work analyzes the effect of fire on seed germination, seedling growth, and survival of Pappostipa...
Article
Full-text available
Rumex acetosella is an exotic perennial herb that invades grassland gaps (i.e., area between tussock grasses) at NW Patagonia. The aim of this study was to estimate the degree of invasion of R. acetosella and to relate cover fl uctuations to gap vegetation characteristics in communities dominated by Pappostipa speciosa (ex Stipa speciosa) and commu...
Article
Full-text available
Fire affects grassland composition by selectively influencing recruitment. Some exotic species can increase their abundance as a consequence of fire-stimulated seed germination, but response may depend on seed age. Rumex acetosella L. (Polygonaceae, sheep's sorrel) is a cosmopolitan herb that has invaded NW Patagonia's grasslands. This species form...