La susceptibilidad de las bromeliáceas epífitas al cambio climático

Cach-Pérez, Manuel J.; Andrade, José Luís; Reyes‐García, Casandra

doi:10.17129/botsci.55

Cited by 24 publications

(12 citation statements)

References 70 publications

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“…On the other hand, the two tank species T. fasciculata and T. dasyliriifolia had higher plasticity in osmotic potential than the rest of the species. Low osmotic potential has been related to osmotic adjustment in the later species (Cach-Pérez, 2013). In general, the RDPI values reported here were similar or higher than those reported in other CAM epiphytes (Bromeliaceae, Chaves et al., 2018; Orchidaceae, de la Rosa-Manzano et al., 2017) but lower than those reported for C 3 epiphytes (with the exception of T. balbisiana ; Pires, de Almeida, Abreu, & da Costa Silva, 2012).…”

Section: Discussionmentioning

confidence: 99%

Morphophysiological Plasticity in Epiphytic Bromeliads Across a Precipitation Gradient in the Yucatan Peninsula, Mexico

Cach-Pérez

Andrade

Reyes‐García

2018

Tropical Conservation Science

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Plasticity may be a key factor to determine plant survival under a changing environment as a result of climate change or land use modification. Plasticity in physiological and morphological traits was evaluated in seven epiphytic Tillandsia species (Bromeliaceae) from six vegetation communities along a precipitation gradient in the Yucatan Peninsula, Mexico. Microenvironmental conditions (air temperature and humidity, light, and vapor pressure deficit), as well as Á titratable acidity, osmotic potential, relative water content, and succulence were characterized during wet, early dry, and dry seasons. We calculated the relative distances plasticity index using physiological data from the wet and dry seasons; morphological plasticity was also calculated for foliar trichome and stomatal traits from previously published data. We found high variation in microenvironmental conditions between seasons, particularly for the tropical dry deciduous forest. The dry season had a negative effect in all physiological variables (decrease from 40% to 59% for Á titratable acidity and 10% to 38% for relative water content). The highest plasticity was registered for T. balbisiana (physiological: 0.29, anatomical: 0.18) and the lowest for T. fasciculata and T. yucatana. Nonmetric multidimensional scaling analysis separated individuals distributed in the wettest vegetation types from those distributed in the driest vegetation types, irrespective of the species, showing convergent physiological strategies to confront environmental variation. We found higher plasticity in water use traits in atmospheric species, compared to tanks and higher plasticity in general in species with wide distribution compared to those with small distribution ranges.

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Section: Discussionmentioning

confidence: 99%

Morphophysiological Plasticity in Epiphytic Bromeliads Across a Precipitation Gradient in the Yucatan Peninsula, Mexico

Cach-Pérez

Andrade

Reyes‐García

2018

Tropical Conservation Science

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“…Las epífitas, por su parte, también poseen adaptaciones morfo-fisiológicas variadas que les permiten colonizar diferentes sitios del forófito de acuerdo a las condiciones microclimáticas y morfológicas del árbol hospedero. Como ejemplos se pueden mencionar el velamen de las orquídeas, los tanques denominados "fitotelmata" de algunas bromelias, los tricomas especializados en la absorción de agua y nutrientes de la atmósfera, las distintas formas de dispersión de las semillas (anemócoras o endozoócoras) (Benzing 2000), las hojas suculentas y la cutícula engrosada (Jiménez-López et al 2017), o el metabolismo CAM que les permite regular la pérdida de agua bajo las condiciones xéricas del dosel (Cach-Pérez et al 2014).…”

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Distribución de epífitas vasculares sobre cuatro especies arbóreas en un bosque xerofítico del Chaco Húmedo, Argentina

2018

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RESUMEN.Las epífitas aportan una gran diversidad específica y brindan numerosos servicios ecosistémicos en los bosques. En el Chaco Húmedo, los estudios sobre epífitas son muy escasos, por lo cual se realizó una descripción de la comunidad de epífitas vasculares de cuatro especies arbóreas deciduas representativas de un quebrachal de la Cuña Boscosa Santafesina. Dos especies pertenecen al estrato superior (Schinopsis balansae y Sideroxylon obtusifolium) y dos al inferior (Prosopis spp. y Acacia praecox). En invierno se seleccionaron al azar ocho individuos de cada especie y cada uno fue dividido en cuatro zonas (Zona I-II: tronco principal; Zona III: bases de las ramas; Zona IV: parte media de las ramas; Zona V: ramas más finas). En cada zona se contaron e identificaron a nivel de especie todas las epífitas vasculares. En la Zona V se diferenciaron ramas vivas y secas. Los datos se analizaron estadísticamente con modelos lineales generalizados mixtos y análisis multivariados. Se registraron 14 especies (nueve holoepífitas, dos facultativas y tres accidentales) de cuatro familias (Bromeliaceae, Cactaceae, Polypodiaceae y Anacardiaceae). La familia Bromeliaceae fue la más rica, con siete especies del género Tillandsia y Aechmea distichantha. La especie más abundante fue Tillandsia recurvata. Prosopis spp. tuvo la mayor abundancia de epífitas y S. obtusifolium la mayor riqueza. La Zona V tuvo mayor abundancia y riqueza de epífitas en promedio que las otras zonas. Se observaron diferencias cuantitativas entre forófitos en la composición de especies: A. distichantha y T. loliacea estuvieron asociadas positivamente con S. obtusifolium. Prosopis spp. tuvo mayor abundancia y riqueza de epífitas en ramas secas, y los forófitos del estrato superior, en ramas vivas. Las diferencias en abundancia, riqueza, composición específica y distribución vertical de epifitas entre forófitos podrían atribuirse a sus características morfológicas y a la variedad de microhábitats en el tronco y las ramas.

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“…Epiphytic bromeliads are highly sensitive to changes in environmental conditions, such as water availability (as rain, dew or fog), the quantity of light they receive and the nutrients they obtain from organic decomposition within tanks or from precipitation, all of which vary among habitats, host tree species, canopy strata and seasons (Andrade, 2003;Graham & Andrade, 2004;Mondrag on et al, 2004;Zotz & Asshoff, 2010;Chilpa-Galv an et al, 2013;Cach-P erez, Andrade & Reyes-Garc ıa, 2014). In this sense, the environment influences both stomatal and trichome density; species from wetter environments tend to have reduced trichome densities and higher stomatal densities, whereas species from drier environments possess high trichome density, wide trichome shields and low stomatal densities (Benzing, 2000).…”

Section: Introductionmentioning

confidence: 99%

Environmental influence on the inter- and intraspecific variation in the density and morphology of stomata and trichomes of epiphytic bromeliads of the Yucatan Peninsula

et al. 2016

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We set out to test whether trichome and stomata variation in epiphytic bromeliads in the field would support the hypothesis that trichomes confer protection from excess light, increase water absorption and protect the stomata. We characterized the intra-and interspecific plasticity in the morphology and density of trichomes and stomata of 14 epiphytic bromeliad species found in six contrasting vegetation types (coastal sand dune scrub, scrub mangrove, pet en mangrove, and deciduous, semi-deciduous and semi-evergreen forest) on the Yucatan Peninsula along a precipitation gradient from 500 to 1500 mm (mean annual precipitation). We performed leaf impressions to determine trichome and stomatal density and to characterize morphology. Trichome morphology did not show variation between sites, but was distinctive for the species. Our data supported the existing hypothesis that trichome density and area were higher in the atmospheric species that inhabited the drier sites, compared with the wetter extreme, which may confer higher protection against photoinhibition and desiccation. Stomatal density increased with precipitation in tank species, and negatively correlated with vapour pressure deficit during the dry season. Fewer trichomes and greater numbers of stomata than expected by rainfall were found in mangroves that maintained low vapour pressure deficit during the dry season.

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La susceptibilidad de las bromeliáceas epífitas al cambio climático

Cited by 24 publications

References 70 publications

Morphophysiological Plasticity in Epiphytic Bromeliads Across a Precipitation Gradient in the Yucatan Peninsula, Mexico

Morphophysiological Plasticity in Epiphytic Bromeliads Across a Precipitation Gradient in the Yucatan Peninsula, Mexico

Distribución de epífitas vasculares sobre cuatro especies arbóreas en un bosque xerofítico del Chaco Húmedo, Argentina

Environmental influence on the inter- and intraspecific variation in the density and morphology of stomata and trichomes of epiphytic bromeliads of the Yucatan Peninsula

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