Habitat structure and vegetation relationships in central Argentina salt marsh landscapes

Cantero, Juan José; León, Rolando J.C.; Cisneros, José Manuel; Cantero, Alberto

doi:10.1023/a:1008071813231

Cited by 45 publications

(8 citation statements)

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“…As mentioned in the methods section and according to [36,54,55], the semi-variogram method is very efficient for the delineation of the hidden spatial trends in the CO 2 flux measurements. Since a spatial distribution of points has been achieved from the measurement procedure, the following alternative methods were employed for the calculation of fractal dimensions with the semi-variogram method: (1) reorganizing the flux measurements in four different directions (horizontal, vertical, 45 • and 135 • ) via arbitrarily selecting pairs of measurements from the whole dataset (each pair indicated with a different ID number), so that all the selected series of pairs correspond to each one of the four directions; (2) reorganizing the series of pairs of 1), with reference to their intra-pair distance; and (3) arbitrary selecting pairs of measurements with different distances from the fault.…”

Section: Resultsmentioning

confidence: 99%

Fractal Dimension Analysis Applied to Soil CO2 Fluxes in Campotosto’s Seismic Area, Central Italy

et al. 2020

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This article reports fractal dimension analysis applied to soil CO2 fluxes measured in an Italian seismic area. The work was carried out with the use of a calibrated flux chamber unit. The fractal dimension (FD) from isotropic variograms was used as a method to understand related scale-dependent phenomena. The aim was to investigate the spatial variability of CO2 flux measurements in four directions (horizontal, vertical, 45° and 135° directions) related to different distances between the measuring points and from a fault. High fractal dimension values were found (2.5 ≤ FD ≤ 3.0). These imply strong anti-persistent behavior near to and far from the fault. Lower fractal dimensions were addressed at longer distances from the fault.

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Section: Resultsmentioning

confidence: 99%

Fractal Dimension Analysis Applied to Soil CO2 Fluxes in Campotosto’s Seismic Area, Central Italy

et al. 2020

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“…Interspecific competition may also play a role in shaping realized niches (Pennings & Callaway, 1992), although it is considered minor in salt‐affected habitats (Bonis et al., 2005; Cantero et al., 1998), where a few adapted halophytes gain an advantage over many associated species (Austin, 1980; Flowers & Colmer, 2015; Reimann & Breckle, 1995). For example, shifts to low mN values might be explained by the low competitive strength of some species (e.g.…”

Section: Discussionmentioning

confidence: 99%

“…Interspecific competition may also play a role in shaping realized niches (Pennings & Callaway, 1992), although it is considered minor in salt-affected habitats (Bonis et al, 2005;Cantero et al, 1998),…”

Section: Model Responsesmentioning

confidence: 99%

Beyond salinity: Plants show divergent responses to soil ion composition

Pätsch,

Midolo,

Dítě

et al. 2024

Global Ecol Biogeogr

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AimIn salt‐affected environments, salinity shapes ecosystem functions and species composition. Apart from salinity, however, we know little about how soil chemical factors affect plant species. We hypothesized that specific ions, most of which contribute to salinity, co‐determine plant niche differentiation. We asked if the importance of ions differs for species with (halophytes) and without (associated species) physiological adaptations to saline soils.LocationCarpatho‐Pannonian region (Central and Eastern Europe).Time period2005–2021.Major taxa studiedVascular plants.MethodsWe recorded species occurrences and collected soil samples in 433 plots in saline habitats. We measured pH, salinity (electrical conductivity), and concentrations of Ca2+, K+, Mg2+, Na+, SO42− Cl−, CO32− and mineral nitrogen (mN) and calculated the sodium adsorption ratio (SAR). For 88 species, we fitted response curves with Huisman–Olff–Fresco (HOF) models. To study ions' effects on species composition and ions' variance, we compared unconstrained and constrained ordinations and performed a principal component analysis. We used random forests to analyse the importance of ions for individual species and created two‐dimensional species niche plots for key ions.ResultsIon concentration niches varied among species and did not necessarily correspond to soil salinity or alkalinity. We frequently observed monotonic, sigmoidal model responses, while skewed unimodal responses were rare. Ions explained a considerable proportion of species compositional variation. Particularly, Na+, SO42−, Cl−, and CO32− contributed to the ions' variance. Na+, followed by SO42−, Cl−, CO32−, Ca2+, Mg2+, and mN, was most important for the occurrence of individual species. Compared to associated species, Na+, SO42−, and mN were significantly less important for halophytes, whereas Cl− and CO32− played a significant role.Main conclusionsWe show that ion composition co‐determines niche differentiation in saline soils, suggesting evolved physiological adaptations in halophytes. Our study calls for incorporating high‐resolution data on soil ion composition in ecological research.

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“…Las familias mejor representadas en este estudio (Poaceae, Asteraceae y Chenopodiaceae) son de las más frecuentes en ambientes salinos y sódicos (Walter 1961, Liphschitz y Waisel 1982, Schirmer y Breckle 1982, Breckle 1990, Le Houérou 1993, Cantero et al 1998, Cobo-M 2001b, Vercelli et al 2013, Hasanuzzaman et al 2014, Mata-F et al 2014. Estas familias también son señaladas por Cantero et al (1996), Lendínez et al (2011), Cantero et al (2016) y Orrego et al (2018 como las de mayor riqueza de taxones en suelos salinos.…”

Section: Discussionunclassified

Diversidad florística de suelos halomórficos cultivados del Alto Valle de Río Negro (Argentina)

2022

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En el Alto Valle de Río Negro, el riego excesivo y drenaje deficiente ocasionan el ascenso de la capa freática con sales disueltas que, combinados con la textura del suelo, promueven su salinización. Consecuentemente, prosperan halófitos y merman los rendimientos de los cultivos y la calidad de los productos. El objetivo del presente trabajo es analizar la diversidad florística de halófitos en diferentes cultivos y grupos texturales en el área. Se realizaron relevamientos de vegetación sobre parches salinizados en diferentes establecimientos productivos. Para cada taxón se calculó el valor de importancia y se lo clasificó según su origen geográfico, hábito, forma de vida y mecanismo para resistir la salinidad. La comparación florística entre ambientes se realizó mediante los índices ecológicos riqueza, diversidad y equitatividad, y técnicas de agrupamiento jerárquico. El listado florístico presenta 111 taxones infragenéricos. Las familias mejor representadas son Poaceae, Asteraceae y Chenopodiaceae. El 70,27 % de los taxones son pseudohalófitos, el 17,11 % crinohalófitos y el 12,62 % euhalófitos. Los suelos de barda y media barda tienen los índices ecológicos más altos. Los cultivos abandonados y forrajeros presentan los mayores valores de diversidad y equitatividad, mientras que los de vid y abandonados, mayor riqueza específica. Los valores de similitud florística en los grupos texturales son bajos a medios, mientras que, en los cultivos, medios a altos. Se presenta el primer inventario florístico de taxones halófilos en suelos halomórficos cultivados para la región que provee información útil para una gestión adecuada de los establecimientos productivos.

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Habitat structure and vegetation relationships in central Argentina salt marsh landscapes

Cited by 45 publications

References 55 publications

Fractal Dimension Analysis Applied to Soil CO2 Fluxes in Campotosto’s Seismic Area, Central Italy

Fractal Dimension Analysis Applied to Soil CO2 Fluxes in Campotosto’s Seismic Area, Central Italy

Beyond salinity: Plants show divergent responses to soil ion composition

Diversidad florística de suelos halomórficos cultivados del Alto Valle de Río Negro (Argentina)

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