Effects of fire on a forest-grassland ecotone in De La Plata River, Argentina

Sirolli, Horacio; Kalesnik, Fabio

doi:10.1007/s11258-010-9855-1

Cited by 5 publications

(3 citation statements)

References 19 publications

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“…pers). Estudios previos han observado la asociación de esta especie en comunidades herbáceas a la presencia de fuego (Sirolli & Kalesnik, 2011;Carreras et al, 2012), sugiriendo que además de características morfológicas favorables para la regeneración post-incendio (presencia de xilopodio; Fuentes et al, 2011), su germinación también podría ser estimulada por el fuego (Galíndez et al, 2010). Resultaría interesante indagar sobre la ecología reproductiva y las interacciones bióticas de las especies indicadoras para tratar de explicar los mecanismos ecológicos de su ocurrencia diferencial en regímenes de fuego contrastantes.…”

Section: Discussionunclassified

Cambios florísticos inducidos por la frecuencia de fuego en el Chaco Serrano.

Carbone¹,

Aguirre-Acosta²,

Tavella³

et al. 2017

Bol. Soc. Argent. Bot.

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Summary: Floristic changes induced by fire frequency in Chaco Serrano. The Sierras Chicas from Córdoba is the mountain range with the highest fire frequency in central Argentina. However, the response to fire frequency of Chaco Serrano plant communities has not yet been assessed. Based on 23-year fire history, we surveyed all vascular plants in unburned, low and high fire frequency sites in the Chaco Serrano district located on Sierras Chicas from Córdoba. We found that fire frequency induces changes in vegetation structure, plant richness, and composition. Specifically, we observed a decrease in total plant richness at sites with a higher number of fire events. All life forms showed decreases in richness to the effects of fire, except the graminoids that showed no changes. In addition, we recorded a change in the species composition between the burned sites (both frequencies) and unburned sites, evidenced through the emergence of indicator species that define both conditions. These results indicate that fire is a strong ecological process that shapes plant communities, selecting species with life history traits (i.e., resprouting and lifespan) that confer adaptative value to new environmental conditions imposed by the regime of high fire frequency.Key words: Fire regime, plant richness, species composition, indicator species, Sierras Chicas.Resumen: Las Sierras Chicas de Córdoba son el cordón montañoso con mayor frecuencia de fuego del centro de Argentina. Sin embargo, hasta el momento no se ha evaluado cuál es la respuesta de las comunidades de plantas del Chaco Serrano a los efectos de la frecuencia de fuego. En base a 23 años de historia de fuego, evaluamos la fisonomía de la vegetación, la riqueza y la composición de la comunidad de plantas vasculares en sitios no quemados, con baja y alta frecuencia de fuego en el distrito Chaqueño Serrano localizado en las Sierras Chicas de Córdoba. Encontramos que la frecuencia de fuego produce cambios en la estructura de la vegetación, en la riqueza y en la composición florística. Específicamente, observamos una disminución de la riqueza total de especies en sitios con un mayor número de eventos de fuego. Todas las formas de crecimiento mostraron una disminución de su riqueza a los efectos del fuego, a excepción de los graminoides que no mostraron cambios. Además, detectamos un cambio en la composición de especies entre los sitios quemados (ambas frecuencias) y los sitios no quemados, caracterizado por la emergencia de especies indicadoras que definen ambas condiciones. Estos resultados indican que el fuego es un fuerte proceso ecológico que estructura las comunidades vegetales, seleccionando especies con rasgos de historia de vida (i.e., rebrote y ciclo de vida) que confieren valor adaptativo a las nuevas condiciones ambientales que impone el régimen de elevada frecuencia de fuego.Palabras clave: Régimen de fuego, riqueza de plantas, composición de especies, especies indicadoras, Sierras Chicas.

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Section: Discussionunclassified

Cambios florísticos inducidos por la frecuencia de fuego en el Chaco Serrano.

Carbone¹,

Aguirre-Acosta²,

Tavella³

et al. 2017

Bol. Soc. Argent. Bot.

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“…Las comunidades se diferenciaron en función de sus especies acompañantes: Ricinus communis, Dipsacus fullonum y Trifolium repens. Se trata de especies exóticas invasoras que crecen en terrenos productivos, artificiales o recientemente disturbados (Söyrinki, 1991;Sirolli & Kalesnik, 2011;Busso et al, 2013). La Arboleda de tipa tuvo presencia de gramíneas en su sotobosque, por lo que quedó clasificada junto a los pastizales aunque su composición se aproximó también a la unidad de Bosque (comunidad 7, Fig.…”

Section: Unidades De Vegetación Y Comunidades De La Recu-cnunclassified

Vegetación de un área polderizada del Río de la Plata en la Ciudad de Buenos Aires: la Reserva Ecológica Ciudad Universitaria - Costanera Norte

Fiorenza

Sirolli

Picca

2020

Darwiniana, nueva serie

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Coastal reclamation constitutes a world trend and can result in new ecosystems adapted to the new coastal configuration. In Buenos Aires City, the “Ciudad Universitaria - Costanera Norte” Ecological Reserve (RECU-CN) constitutes one example of the expansion of the coastline in the Río de la Plata sector, carried out in the late 1960s. Given the lack of published works generated systematically that cover the entire area, we set as the objective to describe the RECU-CN vascular plant vegetation. For this, a systematic sampling was carried out in 79 plots of 25 m2, where the coverage of each of the vascular plant species present was registered. We identified 154 taxa, corresponding to 144 species, 123 genus and 58 families, and the total richness was estimated as 238 species. Trees and herbs had the highest coverage of all life forms. Through multivariate analysis, three vegetation units (Wetland, Forest and Grassland with groves) and 10 vascular plant communities were recognized. Vegetation was ordered according to two gradients: one of flood and another of anthropization. From the comparison with the typical plant communities of the region, similarities were found only with those registered in the Wetland unit. Results highlight that both the coexistence of physiognomically diverse vegetation units, as well as the native composition found in the plant communities of the Wetland unit, constitute main conservation values of the protected area.

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“…Under temperate climate (western France), C. selloana can also grow in dry places, because there is no summer drought. In its native range, C. selloana can regenerate and recolonise after fire (Sirolli & Kalesnik, ). The plant easily colonises open habitats (heathlands, dunes, coastal zones), roadsides and urban ecosystems, particularly on disturbed soils (Pausas et al ., ).…”

Section: Introductionmentioning

confidence: 99%

The effects of climate warming and urbanised areas on the future distribution of Cortaderia selloana, pampas grass, in France

et al. 2018

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Summary The spread of many invasive plants could be facilitated by their presence in urban areas that may act as dispersal centres and by climate warming. Cortaderia selloana, pampas grass, is native to South America and raises considerable concern worldwide as an introduction. We used Maxent niche modelling, based on occurrence records and on a set of simulated occurrence points with high probability of presence in urbanised areas in France, where the species was introduced and is still planted. We calibrated the model with current climate data coupled with several habitat variables and used it to predict range shifts of C. selloana under four climate change scenarios (RCP) for 2060. The results were consistent with the known ecology of the species and showed that the most important variables that explain the current distribution in the introduced area were mean annual minimum temperatures, sandy habitats, disturbed habitats and urbanised areas. While the species already occupies large areas along the western and Mediterranean coasts, the models predicted an expansion northward and inland to the east under future climates. The area of suitable habitats could increase by up to 69% under the RCP 8.5 climate scenario in 2060 and by 116% with the extra occurrences in urban/suburban areas. This latter scenario suggests that areas like public and private gardens or urban parks, where the species is currently cultivated, could contribute to increase the invasion risk under climate warming. The results provide predictions of potential environments for the species, which can be helpful for anticipating its spread.

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Effects of fire on a forest-grassland ecotone in De La Plata River, Argentina

Cited by 5 publications

References 19 publications

Cambios florísticos inducidos por la frecuencia de fuego en el Chaco Serrano.

Cambios florísticos inducidos por la frecuencia de fuego en el Chaco Serrano.

Vegetación de un área polderizada del Río de la Plata en la Ciudad de Buenos Aires: la Reserva Ecológica Ciudad Universitaria - Costanera Norte

The effects of climate warming and urbanised areas on the future distribution of Cortaderia selloana, pampas grass, in France

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