Impact of Melinis minutiflora (Poaceae) on the diversity of vascular plants of grasslands of the sandstones of Misiones (Argentina)

Background and aims: The invasion of natural ecosystems by alien species represents a major concern in the context of global conservation. In the fields of Teyú Cuaré, in the department of San Ignacio, Misiones, there is a high level of endemism with at least eight species of microendemic vascular p...

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Autores principales: Rojas, José Lucas, Keller, Héctor Alejandro, Ramírez, Renzo
Formato: Artículo revista
Lenguaje:Español
Publicado: Sociedad Argentina de Botánica 2023
Materias:
especies endémicas
exótica
invasión
Melinis minutiflora
endemic species
exotic
invasion
Acceso en línea:https://revistas.unc.edu.ar/index.php/BSAB/article/view/38517
Aporte de:
Revistas de la UNC de Universidad Nacional de Córdoba
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record_format ojs
institution Universidad Nacional de Córdoba
institution_str I-10
repository_str R-10
container_title_str Revistas de la UNC
language Español
format Artículo revista
topic especies endémicas
exótica
invasión
Melinis minutiflora
endemic species
exotic
invasion
Melinis minutiflora
spellingShingle especies endémicas
exótica
invasión
Melinis minutiflora
endemic species
exotic
invasion
Melinis minutiflora
Rojas, José Lucas
Keller, Héctor Alejandro
Ramírez, Renzo
Impact of Melinis minutiflora (Poaceae) on the diversity of vascular plants of grasslands of the sandstones of Misiones (Argentina)
topic_facet especies endémicas
exótica
invasión
Melinis minutiflora
endemic species
exotic
invasion
Melinis minutiflora
author Rojas, José Lucas
Keller, Héctor Alejandro
Ramírez, Renzo
author_facet Rojas, José Lucas
Keller, Héctor Alejandro
Ramírez, Renzo
author_sort Rojas, José Lucas
title Impact of Melinis minutiflora (Poaceae) on the diversity of vascular plants of grasslands of the sandstones of Misiones (Argentina)
title_short Impact of Melinis minutiflora (Poaceae) on the diversity of vascular plants of grasslands of the sandstones of Misiones (Argentina)
title_full Impact of Melinis minutiflora (Poaceae) on the diversity of vascular plants of grasslands of the sandstones of Misiones (Argentina)
title_fullStr Impact of Melinis minutiflora (Poaceae) on the diversity of vascular plants of grasslands of the sandstones of Misiones (Argentina)
title_full_unstemmed Impact of Melinis minutiflora (Poaceae) on the diversity of vascular plants of grasslands of the sandstones of Misiones (Argentina)
title_sort impact of melinis minutiflora (poaceae) on the diversity of vascular plants of grasslands of the sandstones of misiones (argentina)
description Background and aims: The invasion of natural ecosystems by alien species represents a major concern in the context of global conservation. In the fields of Teyú Cuaré, in the department of San Ignacio, Misiones, there is a high level of endemism with at least eight species of microendemic vascular plants. These grasslands are considered the only Cerrado fragments present in Argentina and are being invaded by Melinis minutiflora (Poaceae). The aim of this work was to evaluate how this adventitious grass affects the composition and diversity of the vegetation, and to determine the progress in the period 2015-2017. M&M: To measure the impact, the vegetation was sampled using 25 random plots of 1x1m in areas with and without invasion. Phytosociological parameters and diversity indices were calculated. For the measurement of progress, perimeter walks were carried out with GPS. Results: We found that areas free of this exotic grass had a higher total number of species (81), and a higher number of species exclusively present only in these sites (51), as well as very different values for phytosociological parameters. The area analysis showed an increase from approximately 9,744 m² to 23,396 m². Conclusions: Our results indicate that the advance of M. minutiflora populations is vertiginous and that it exerts a significant pressure on grassland structure and diversity by occupying the ecological niche of native herbs and subshrubs.
publisher Sociedad Argentina de Botánica
publishDate 2023
url https://revistas.unc.edu.ar/index.php/BSAB/article/view/38517
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first_indexed 2023-04-01T18:55:38Z
last_indexed 2023-06-09T00:01:14Z
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spelling I10-R10-article-385172023-06-01T14:07:40Z Impact of Melinis minutiflora (Poaceae) on the diversity of vascular plants of grasslands of the sandstones of Misiones (Argentina) Impacto de Melinis minutiflora (Poaceae) en la diversidad de plantas vasculares de pastizales de las areniscas de Misiones (Argentina) Rojas, José Lucas Keller, Héctor Alejandro Ramírez, Renzo especies endémicas exótica invasión Melinis minutiflora endemic species exotic invasion Melinis minutiflora Background and aims: The invasion of natural ecosystems by alien species represents a major concern in the context of global conservation. In the fields of Teyú Cuaré, in the department of San Ignacio, Misiones, there is a high level of endemism with at least eight species of microendemic vascular plants. These grasslands are considered the only Cerrado fragments present in Argentina and are being invaded by Melinis minutiflora (Poaceae). The aim of this work was to evaluate how this adventitious grass affects the composition and diversity of the vegetation, and to determine the progress in the period 2015-2017. M&M: To measure the impact, the vegetation was sampled using 25 random plots of 1x1m in areas with and without invasion. Phytosociological parameters and diversity indices were calculated. For the measurement of progress, perimeter walks were carried out with GPS. Results: We found that areas free of this exotic grass had a higher total number of species (81), and a higher number of species exclusively present only in these sites (51), as well as very different values for phytosociological parameters. The area analysis showed an increase from approximately 9,744 m² to 23,396 m². Conclusions: Our results indicate that the advance of M. minutiflora populations is vertiginous and that it exerts a significant pressure on grassland structure and diversity by occupying the ecological niche of native herbs and subshrubs. Introducción y objetivos: La invasión de los ecosistemas naturales por parte de las especies exóticas representa una preocupación importante en el contexto de conservación global. En los campos del Teyú Cuaré, en el departamento de San Ignacio, Misiones, existe un alto nivel de endemismo con al menos ocho especies de plantas vasculares microendémicas. Estos pastizales se consideran los únicos fragmentos de Cerrado presentes en la Argentina y están siendo invadidos por Melinis minutiflora (Poaceae). El objetivo de este trabajo fue evaluar cómo esta gramínea adventicia afecta la composición y diversidad de la vegetación, y determinar el avance en el periodo 2015-2017. M&M: Para medir el impacto se muestreó la vegetación mediante 25 parcelas de 1x1m situadas al azar en áreas con y sin invasión. Se calcularon parámetros fitosociológicos e índices de diversidad. Para la medición del avance se realizaron recorridas perimetrales con GPS.  Resultados: Encontramos que las áreas libres de esta gramínea exótica poseen un mayor número total de especies (81), y mayor número de especies exclusivamente presente solo en estos sitios (51). La diversidad fue significativamente mayor en los sitios no invadidos comparando los perfiles de diversidad. El análisis de superficie mostró un avance de aproximadamente 9.744 m² a 23.396 m².  Conclusiones: Nuestros resultados indican que el avance de las poblaciones de M. Minutiflora es vertiginoso y que ejerce una importante presión sobre la estructura de los pastizales y su diversidad, al ocupar el nicho ecológico de las hierbas y subarbustos nativos. Sociedad Argentina de Botánica 2023-03-23 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion application/pdf text/html https://revistas.unc.edu.ar/index.php/BSAB/article/view/38517 Boletín de la Sociedad Argentina de Botánica (Journal of the Argentine Botanical Society; Vol. 58 No. 1 (2023): March Boletín de la Sociedad Argentina de Botánica; Vol. 58 Núm. 1 (2023): Marzo Boletín de la Sociedad Argentina de Botánica; v. 58 n. 1 (2023): Marzo 1851-2372 0373-580X 10.31055/1851.2372.v58.n1 spa https://revistas.unc.edu.ar/index.php/BSAB/article/view/38517/40872 https://revistas.unc.edu.ar/index.php/BSAB/article/view/38517/40873 Derechos de autor 2023 José Lucas Rojas, Héctor A. Keller, Renzo Ramírez https://creativecommons.org/licenses/by-nc-nd/4.0

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