Efecto del fuego y la ganadería en bosques de Polylepis australis (Rosaceae) a lo largo de un gradiente altitudinal en las montañas del centro de la Argentina

Argibay, Daihana Soledad; Renison, Daniel

doi:10.4067/s0717-92002018000100145

Cited by 17 publications

(19 citation statements)

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“…While the study must be considered as a starting point that requires further exploration, the prehistoric record of Quebrada del Real 1 indicates that the maintenance of habitat dominated by P. australis trees to stop erosion is critical to the conservation of the upper mountain grassland range and their headwater catchment that provide water to modern cities located basin down. Thus, the zooarchaeological data of C. viarapaensis support the immediate need to achieve more control of modern livestock densities to prevent fires, soil erosion and biodiversity losses under semi-arid conditions as it was proposed by many researchers (Renison et al 2004;Renison et al 2010;Alinari et al 2015;Cingolani et al 2015;Chartier et al 2016;Argibay & Renison 2018;Giorgis et al 2020), mostly when the application of these management policies displayed positive results in the Parque Nacional Quebrada del Condorito (Fig. 2b).…”

Section: Resultssupporting

confidence: 52%

“…The loss of soil probably caused the extinction of C. viarapaensis, mainly when it was a rodent strongly adapted for digging (De Santi et al 2020). Several studies report the aggressive effect of the traditional method of livestock production on soil, whose advance leaves behind exposed bedrock areas (Renison et al 2010;Cingolani et al 2013;Barros et al 2014;Alinari et al 2015;Chartier et al 2016;Argibay & Renison 2018;Giorgis et al 2020). Under such environmental changes, Ctenomys populations that could not move to another location disappeared as happened with C. viarapaensis and as it would be occurring today with C. osvaldoreigi (Torres & Tamburini 2018;Mora et al 2019).…”

Section: Resultsmentioning

confidence: 99%

“…Zoogeographically, the area is included in the Sub-Andean District of the Andean-Patagonian Sub-region (Ringuelet 1961), which supports endemic mammals species such as Ctenomys osvaldoreigi, Akodon polopi, Lycalopex culpaeus smithersi and extinct hunting preys for humans as Lama guanicoe (Torres & Tamburini 2018). The upper mountain grassland range is also a priority conservation area because its land cover types and topographical features optimise water provisioning services in a seasonal dry region, particularly when water for human consumption is directly obtained from rivers originating on the mountain tops (Cingolani et al 2015;Argibay & Renison 2018).…”

Section: Geographical and Stratigraphical Settingmentioning

confidence: 99%

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Fossorial rodents and applied zooarchaeology to ecosystem conservation in Sierras of Córdoba, Argentina

et al. 2020

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This paper presents the zooarchaeological research carried out on Ctenomys (Rodentia: Ctenomyidae) bone remains recovered at Quebrada del Real 1 (ca. 7400–360 years BP), an archaeological site located in the Sierras of Córdoba upper mountain grassland range of Argentina. Here, we focus on the importance of Ctenomys implications to wild‐life management and conservation biology rather than its classical archaeological view as a subsistence resource. The primary aim was to provide critical information about the recent past biogeography of Ctenomys that may not be evident from modern fauna surveys. From the description of a highly specialised fossorial rodent extinct at the end of the Holocene, the study points out the extreme fragility of the Sierras of Córdoba high mountain environments under climate change and anthropogenic threat, drawing on data that are relevant to those who make decisions and write guidelines for wild‐life management. The analysis of the Ctenomys assemblage from Quebrada del Real 1 revealed information related to the management, conservation and restoration of the mountain top environments that cannot be ignored by conservation biologists and wild‐life managers, moreover when the causes that lead to the extinction of C. viarapaensis are the same ones affecting to modern plant and animal communities. The zooarchaeological record reflects past conditions to assess preindustrial ecological states of the upper mountain grassland range that otherwise would have never been known as a baseline for environmental management. Thus, applied zooarchaeology to conservation biology requires further exploration at Sierras of Córdoba in order to produce accurate knowledge about the high‐altitude ecosystems function, fragility and biodiversity loss, which is necessary to understand the present and improve the future of three million people who depend on the ecological services from these environments.

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Section: Resultssupporting

confidence: 52%

Section: Resultsmentioning

confidence: 99%

Section: Geographical and Stratigraphical Settingmentioning

confidence: 99%

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Fossorial rodents and applied zooarchaeology to ecosystem conservation in Sierras of Córdoba, Argentina

et al. 2020

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“…The endemic treeline species Polylepis australis (Rosaceae) is the southernmost species of this genus and dominates the canopy of open‐canopy forests (also called woodlands). In central Argentina, P. australis individuals can be found from 900 to 2,700 m.a.s.l., with highest performance at around 1,800 m according to growth and seed production (Marcora, Hensen, Renison, Seltmann, & Wesche, ) and around 1,900 m according to P. australis forest cover, post‐fire survival and growth (Argibay & Renison, ). The species is wind pollinated and self‐incompatible (Seltmann, Cocucci, Renison, Cierjacks, & Hensen, ), and fruits are single‐seeded nutlets (hereafter referred to as seeds) that ripen and fall from the trees between January and April.…”

Section: Methodsmentioning

confidence: 99%

Effects of altitude, land use and microsites on early life performance of a high mountain tree: Insights from an in situ sowing experiment

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Schrieber

Lachmuth

et al. 2019

Diversity and Distributions

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Aim: Understanding the forces that drive range shifts in forest landscapes is imperative for predicting species distributions under anthropogenic climate and land use change. However, empirical studies exploring how these components jointly influence critical early life stages of mountain tree species across environmental gradients are scarce. We used the high mountain tree Polylepis australis as model species to investigate the relative importance of altitude and associated climatic conditions, land use for livestock and microsite characteristics on early life performance.Location: Córdoba Sierras, central Argentina. Methods:We set up an extensive in situ sowing experiment with a robust split-plot design that integrated spatial scales ranging from 0.4 m 2 subplots at the microsite level (associated with vegetative and microtopographic structures), to livestock exclosure and enclosure plots of several hectares, to an altitudinal gradient of 1,000 m.Components of early life performance were monitored across two subsequent growing seasons. Results: Microsite characteristics played a fundamental role in P. australis establishment, whereby interactions with altitude and/or land use suggested alternate mechanisms: facilitation (likely reduced desiccation) dominated at low altitude while at high altitude, abiotic stress (likely intensive frost and radiation) overruled any microsite effects. At mid-altitude, benefits of competition release prevailed over facilitation and microsite effects gained importance under livestock presence. Inconsistencies between pre-and post-emergence responses illustrated potential trade-offs between beneficial and detrimental effects of microsite conditions upon performance throughout early life: a favourable location for seeds may abruptly turn adverse for seedlings. Main conclusions:We unravel how changes in altitude, anthropogenic disturbances and microsite characteristics jointly modulate P. australis performance across stages of early establishment. Such information is fundamental when categorizing specific

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“…Al igual que en otros casos, en nuestro sistema, una vez que se conforma un bosque maduro es difícil que se queme (Tepley et al 2018). Sin embargo, la suma de años muy secos con el incremento de las igniciones por causas antropogénicas puede desencadenar un fuego de alta severidad que queme por completo la biomasa aérea del bosque y promueva un reemplazo por comunidades sucesionales tempranas (Tepley et al 2018;Argibay and Renison 2018). En otros casos, este cambio se puede producir de forma paulatina cuando otros disturbios antropogénicos (e.g., el ganado o la tala selectiva) modifican la estructura del bosque y las características del sotobosque, promoviendo una inflamabilidad mayor (Uhl and Kauffman 1990;Raffaele et al 2011;Blackhall et al 2015b).…”

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El tamaño de los individuos y el microambiente afectan el daño por fuego y la supervivencia en árboles del Chaco Serrano

et al. 2019

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RESUMEN. Los incendios afectan de distinta manera a ejemplares de una misma especie leñosa según el tamaño del individuo y las condiciones del microambiente, entre otros factores. Esto tiene implicancias en la estructuración de los paisajes forestales, ya que la velocidad a la que se recupera el bosque depende, en parte, de la severidad con la cual el fuego afecta a los individuos leñosos. Nos propusimos analizar cómo el tamaño y el microambiente afectan el nivel de daño por fuego y la supervivencia en dos especies leñosas características del bosque chaqueño serrano, en un gradiente altitudinal en las Sierras de Córdoba (Argentina). Estudiamos dos incendios que ocurrieron entre julio y agosto de 2007. Seleccionamos 163 espinillos (Vachellia caven) y 48 molles (Lithraea molleoides) localizados entre 800 y 1700 m s. n. m. Para cada individuo estimamos la altura y el volumen pre-fuego en base al leño remanente, y características del microambiente como cobertura vegetal, proporción de roca bajo la copa, pendiente, orientación de la ladera e insolación por intercepción. Tres meses después estimamos el daño por fuego y tres años más tarde evaluamos la supervivencia. Los espinillos con más vegetación en su ambiente circundante sufrieron más daño por el fuego, y este efecto fue más pronunciado a menores altitudes. Además, los ejemplares de las laderas sur con mucha pendiente sufrieron más daño que los de las laderas norte, y los individuos más pequeños resultaron más dañados que los grandes. Los molles más altos sufrieron menos daño por fuego que los más bajos. El 94% de los espinillos y el 92% de los molles sobrevivieron al incendio, y, en el caso del espinillo, la probabilidad de morir fue mayor para los ejemplares más pequeños. Concluimos que el sistema se vuelve menos susceptible al fuego a medida que avanza la sucesión, al aumentar el tamaño de los individuos y disminuir la cobertura herbácea.[Palabras clave: altitud, altura del árbol, bosque serrano, cobertura vegetal, espinillo, incendios, molle, pendiente, rocosidad, Sierras de Córdoba] ABSTRACT. Tree size and microenvironment affect fire damage and survival in Chaco Serrano. Wildfires differentially affect specimens of the same woody species, depending, among other factors, on tree size and microenvironment. This has implications for the structuring of forest landscapes, as forest recovery depends, in part, on the severity of fire on woody specimens. We aimed at analyzing how microenvironment and tree size affect fire damage and survival in two woody species common in the Chaco Serrano forest, along an altitudinal gradient in Córdoba Mountains (Argentina). We studied two wildfires that occurred in July and August 2007. We selected 163 espinillos (Vachellia caven) and 48 molles (Lithraea molleoides) located between 800 and 1700 m a. s. l. For each individual, we estimated pre-fire height and volume on the basis of the remaining woody tissues, and microenvironmental characteristics as plant cover, rock proportion under the crown, slope, aspect and insolation by in...

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Efecto del fuego y la ganadería en bosques de Polylepis australis (Rosaceae) a lo largo de un gradiente altitudinal en las montañas del centro de la Argentina

Cited by 17 publications

References 19 publications

Fossorial rodents and applied zooarchaeology to ecosystem conservation in Sierras of Córdoba, Argentina

Fossorial rodents and applied zooarchaeology to ecosystem conservation in Sierras of Córdoba, Argentina

Effects of altitude, land use and microsites on early life performance of a high mountain tree: Insights from an in situ sowing experiment

El tamaño de los individuos y el microambiente afectan el daño por fuego y la supervivencia en árboles del Chaco Serrano

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