Sofía Gonzalez

Sofía Gonzalez
Centro Científico Tecnológico Conicet Comahue-INIBIOMA

Dr.

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41
Publications
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297
Citations

Publications

Publications (41)
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...
Poster
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Baccharis linearis (Ruiz & Pav.) Pers. (Asteraceae) is a multipurpose shrub, endemic to southern Argentina and Chile. The uses of this species are not systematized and its cultivation requirements are unknown, which are priority aspects for its ex situ management. The objectives were to systematize the uses and evaluate the germination requirements...
Book
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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
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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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The introduction of alien species represents one of the greatest threats to biodiversity worldwide. Highway construction increases the dispersal and invasion of exotic plant species. This study examined the assembly process of the plant communities to determine whether the roadsides of the Patagonian steppe represent a reservoir and dispersal sourc...
Chapter
Full-text available
The construction of roads and highways generates road slopes, which may be affected by erosion processes that compromise their stability. One way to restore them is to promote their natural revegetation by the use of ecological restoration techniques. The germinable soil seed bank from a road slope (TL) and their corresponding reference area (AR) i...
Conference Paper
Full-text available
Demographic growth and urban expansion carries with it the development of specific infrastructure, including roads and highways. The highways construction fragment the landscape and generate road slopes that must be revegetated. In a Bariloche neighborhood, native species of Coihue forest (Nothofagus dombeyi) that colonize road slopes and their ref...
Article
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The aim was to evaluate the seed germination requirements of Phacelia secunda J.F. Gmel. and Eryngium paniculatum Cav. y Dombey ex F. Delaroche, perennial herbaceous colonizers of degraded environments of northwest Argentinian Patagonia and of interest for ecological restoration. The germination percentage, mean germination time and time until init...
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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Germinación de Oenothera odorata, onagráceae ruderal endémica de Argentina Chichizola GA, AE Rovere, SL Gonzalez Resumen. Onagraceae es una familia bien definida de plantas con flores y muy utilizada por el hombre. En Argentina posee numerosas representantes indígenas, distribuidas en 8 géneros y 75 especies, sien-do el 19% de las especies endémica...
Article
Full-text available
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)
Chapter
Full-text available
Roads are intrusive elements in the landscape, interrupting the ecosystem and fragmenting populations and habitats. Embankments generated during construction are sloping surfaces which are prone to erosion and frequently devoid of vegetation. Our objective was to determine which native species colonize the embankments of National Highway 23 as it r...
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 Eryngium paniculatum y E. horridum pertenecen al género más amplio dentro de la familia Apiaceae. Son especies herbáceas con potencial de uso en la restauración de ambientes degradados, dado que colonizan bordes de caminos y participan en numerosas interacciones planta-animal. Eryngium paniculatum habita áreas de ecotono entre el bosqu...
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
Agradecimientos INIBIOMA, PIP 0196.. BANCOS DE SEMILLAS EN UN TALUD VIAL DE LA ESTEPA PATAGÓNICA: IMPLICANCIAS PARA LA RESTAURACIÓN INTRODUCCIÓN La construcción de rutas y caminos genera taludes viales, que pueden estar sujetos a procesos de erosión que comprometen su estabilidad. Una forma de recuperarlos es promover su revegetación natural, media...
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...
Article
Full-text available
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...
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...
Article
Full-text available
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...
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
Full-text available
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...
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
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
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
The emergent behaviors of nature are not only the sum of interactions among ecosystem parts but also depend on the organization of these interactions. Fire, climate and vegetation patterns produce non-linear fire propagation across the landscape. Environmental heterogeneity, like outcrop presence and hare density, increases landscape patchiness and...
Chapter
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Grasslands, dominated by herbaceous and woody vegetation, are ecosystems whose structure is determined by fire, grazing, and drought. Although these structuring factors determine the natural dynamics of grasslands, their plant biodiversity can be affected when these disturbances occur in an extreme or unbalanced way. The Argentinean northwestern Pa...
Article
Full-text available
During 1998-1999 a severe drought occurred in northwestern Patagonia that provoked an extensive wildfire. We monitored vegetation cover and the soil seed bank to study the diversity and functional group gap dynamics in burned and unburned sites. Species were grouped into 3 functional groups: forbs, fugitive species, and annual grasses. Post-drought...
Article
Full-text available
We evaluated the combined effects of fire after drought on the seed bank composition and its role in the postfire recovery of NW Patagonia grasslands. During three years, we monitored the seed bank and the aboveground vegetation. Species were arranged in functional groups and Detrended Correspondence Analysis was used to separate sites according to...

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Projects

Projects (5)
Project
Wildland-urban interface fires (residential areas in contact with or surrounded by natural vegetation) are becoming more frequent due to urban expansion and climate change. Our objective is to assess the risk and danger of interface fires in northwestern Patagonia, from the south of Neuquén province to the north of Chubut. We will determine the interface areas and evaluate the fires that have affected it in recent decades. We will analyze the relationship between these fires, temperature and accumulated rainfall and study the incidence of lightning and its link to fires. We will evaluate the anthropic influence on the ignitions and generate a map of anthropic risk. To locate the situations of maximum hazard, we'll assess the flammability and fuel load of the most frequent vegetation units in the interface. We will determine priority areas for the application of prevention, management or planning measures.
Project
The study of the activity of C. haigi is of great importance not only at the case study level but also for the evaluation of the impact at landscape and regional scales on two relevant aspects such as species diversity and pasture productivity. In addition, considering the study on a large scale also implies finding out what are the necessary vital requirements of the species under study. We believe that the precipitation gradient that occurs in the narrow NW Patagonian strip plays an important role in the distribution and abundance of the tuco-tuco. Precipitation is the engine of large-scale productivity, and the tuco-tuco is a herbivorous fossorial rodent, so its abundance will be greatly affected by the availability of vegetation. On the other hand, this work will contribute to theorizations and generalizations about the effects of engineering species.
Project
We evaluate the ecological aspects that allow us to generate knowledge for the rehabilitation of slope cuts generated by road construction, in different environments of Northwest Patagonia