Small shifts in microsite occupation could mitigate climate change consequences for mountain top endemics: a test analyzing saxicolous lichen distribution patterns

Rodríguez, Juan Manuel; Renison, Daniel; Filippini, Edith Raquel; Estrabou, Cecilia

doi:10.1007/s10531-017-1293-0

Cited by 15 publications

(23 citation statements)

References 40 publications

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“…Asimismo, la cobertura de rocas en cada cuadrado fue un factor importante para explicar la mayor cobertura en parcelas quemadas y no quemadas. El aumento de la superficie de las rocas incrementa la oportunidad para el crecimiento de líquenes y briófitos, en particular, en este ambiente (Rodriguez et al, 2017). Observamos que en parcelas quemadas los cuadrados con más rocas presentaron mayor superficie ocupada por criptógamas, sugiriendo un efecto protector de las rocas.…”

Section: Discussionunclassified

“…En los bosques de Polylepis se desarrollan comunidades de organismos criptogámicos, principalmente líquenes y briófitos, muy diversas que utilizan como sustrato a los árboles, arbustos, rocas y suelo. La importancia de estos organismos en este ambiente se refleja en los endemismos encontrados y en la riqueza de especies descriptas (Rodriguez, Truong, Estrabou, Clerc, 2011;Rodriguez, Hernandez, Filippini, Cañas, Estrabou, 2016;Rodriguez, Filippini, Estrabou, Renison, 2017). Sin embargo, un rol clave pero menos estudiado, es la presencia de estos grupos formando parte de la cobertura criptogámica de la superficie del suelo.…”

Section: Introductionunclassified

See 1 more Smart Citation

Impacto del fuego sobre la vegetación no vascular del suelo: un caso de estudio en los bosques de Polylepis australis (Rosaceae) del centro de Argentina

Perazzo

Rodríguez

2019

LIL

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La vegetación no vascular está formada por líquenes, musgos, algas y cianobacterias tanto epífitas, como creciendo sobre el suelo. El objetivo de este trabajo fue estimar los cambios producidos por el fuego en la cobertura de briófitos y líquenes del suelo en parcelas de bosques de Polylepis australis (tabaquillo) en el Parque Nacional Quebrada del Condorito (PNQC) en el centro de Argentina. En un sector del Área Protegida incendiado en setiembre de 2015 se seleccionaron 40 parcelas de 30 x 30 m, 20 en bosques no quemados y 20 en bosques quemados. Quince meses después del siniestro, en cada parcela se seleccionaron al azar cinco cuadrados de 2 x 2 m para estimar cobertura en suelo diferenciando líquenes y briófitos. Además, se registraron la cobertura de plantas vasculares, suelo desnudo y mantillo. Como variables explicativas se midió la orientación y pendiente en cada cuadrado y en cada parcela. Además, se estimó la cobertura de bosque previo al incendio y la severidad del fuego. Los resultados muestran una muy baja superficie ocupada por líquenes y briófitos en el suelo afectado por el fuego a pesar de la recuperación de la vegetación vascular. La cobertura de líquenes y briófitos varían en función de características del micrositio tanto en parcelas quemadas como no quemadas. Se discute el posible impacto de la pérdida de esta cobertura en el ecosistema de bosque de Polylepis.

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Section: Discussionunclassified

Section: Introductionunclassified

Impacto del fuego sobre la vegetación no vascular del suelo: un caso de estudio en los bosques de Polylepis australis (Rosaceae) del centro de Argentina

Perazzo

Rodríguez

2019

LIL

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“…For this reason, the number of "rare" species is much lower in the national flora than within bioclimatically homogeneous ecoregions. This suggests that one of the main drivers for the rarity of species within bioclimatically homogeneous areas lies in the bioclimate itself, since several species bound to a different ecoregion survive in small populations within narrow microclimatic niches (Rodriguez et al 2017). This might also be because lichens, as compared to vascular plants for example, have much wider geographical distributions and a very low number of narrow-ranging endemic species, rendering bioclimatic factors, especially air humidity, one of the main drivers of species distribution and abundance within a given area (Marini et al 2011).…”

Section: Discussionmentioning

confidence: 99%

Exploring patterns of commonness and rarity in lichens: a case study from Italy (Southern Europe)

Nimis

Martellos

Spitale³

et al. 2018

The Lichenologist

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This paper, based on data from the latest checklist of Italy, analyzes the distribution patterns of rare and common lichen species within biogeographically homogeneous versus heterogeneous areas of Italy, and the relationships with some main drivers of rarity and commonness. The following data were used: 1) commonness-rarity values of 2565 species in nine ecoregions; 2) frequency of 353 nationally rare and 387 nationally common species in 21 administrative regions. The following functional and ecological traits were considered: growth form, photobiont(s), type of reproduction, substrata, bioclimatic range, ecological indicator values for aridity and eutrophication, and poleophoby. Within each ecoregion, rare species by far outweigh common species but about one third of these are common in other ecoregions. At the level of regional floras, rarity is significantly associated with epiphytic substrata, non-trebouxioid photobionts and high air humidity, while commonness is associated with saxicolous substrata, trebouxioid photobionts and eutrophication. Rarity seems to mainly depend on two factors, bioclimate (many rare species are outside the limit of their bioclimatic optima) and reduced availability of suitable habitats (e.g. old-growth forests), while commonness is mainly related to disturbance (eutrophication, creation of drier habitats). Most of the nationally rare lichens belong to an oceanic-suboceanic element with tropical affinities or to a small set of continental species with their optima in the dry steppe biome, which suggests that many rare species can persist in microrefugia, that is sites with microclimates that support small populations of species beyond the boundaries of the climatic limits of their main distributions.

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“…Studies in arctic/alpine systems have shown that microclimatic variability linked to small-scale topography can exceed climate variability at the extent and resolution of baseline and climate change scenarios [179,180]. Lichens respond to these microhabitat differences [181,182], and the potential for local adjustment to colonise suitable microclimates may reduce vulnerability to climate change [183]. This model of 'microrefugia' [184,185] may be common among lichens, which respond to environmental change at microhabitat scales; conceptually, this is strongly evidenced for a management context among lichen epiphytes.…”

Section: Habitat Qualitymentioning

confidence: 99%

Climate Change, Bioclimatic Models and the Risk to Lichen Diversity

Ellis

2019

Diversity

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This paper provides an overview of bioclimatic models applied to lichen species, supporting their potential use in this context as indicators of climate change risk. First, it provides a brief summary of climate change risk, pointing to the relevance of lichens as a topic area. Second, it reviews the past use of lichen bioclimatic models, applied for a range of purposes with respect to baseline climate, and the application of data sources, statistical methods, model extents and resolution and choice of predictor variables. Third, it explores additional challenges to the use of lichen bioclimatic models, including: 1. The assumption of climatically controlled lichen distributions, 2. The projection to climate change scenarios, and 3. The issue of nonanalogue climates and model transferability. Fourth, the paper provides a reminder that bioclimatic models estimate change in the extent or range of a species suitable climate space, and that an outcome will be determined by vulnerability responses, including potential for migration, adaptation, and acclimation, within the context of landscape habitat quality. The degree of exposure to climate change, estimated using bioclimatic models, can help to inform an understanding of whether vulnerability responses are sufficient for species resilience. Fifth, the paper draws conclusions based on its overview, highlighting the relevance of bioclimatic models to conservation, support received from observational data, and pointing the way towards mechanistic approaches that align with field-scale climate change experiments.

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Small shifts in microsite occupation could mitigate climate change consequences for mountain top endemics: a test analyzing saxicolous lichen distribution patterns

Cited by 15 publications

References 40 publications

Impacto del fuego sobre la vegetación no vascular del suelo: un caso de estudio en los bosques de Polylepis australis (Rosaceae) del centro de Argentina

Impacto del fuego sobre la vegetación no vascular del suelo: un caso de estudio en los bosques de Polylepis australis (Rosaceae) del centro de Argentina

Exploring patterns of commonness and rarity in lichens: a case study from Italy (Southern Europe)

Climate Change, Bioclimatic Models and the Risk to Lichen Diversity

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