Fecha/hora: 15/06/2024 20:28:41

Biblioteca(s): | INIA Treinta y Tres.
Fecha corriente: | 19/11/2019
Fecha de la última actualización: | 19/11/2019
Autoria: | DRESSENO, A.L.P.; GUIDO, A.; BALOGIANNI, V.; OVERBECK, G. E.
Afiliación: | ANDRÉ L. P. DRESSENO, Graduate Program in Ecology, Universidade Federal do Río Grande do Sul, Porto Alegre, RS, Brasil.; ANACLARA GUIDO, Graduate Program in Ecology, Universidade Federal do Río Grande do Sul, Porto Alegre, RS, Brasil.; VASILIKI BALOGIANNI, Graduate Program in Ecology, Universidade Federal do Río Grande do Sul, Porto Alegre, RS, Brasil.; GERHARD E. OVERBECK, Graduate Program in Ecology, Universidade Federal do Río Grande do Sul, Porto Alegre, RS, Brasil. Department of Botany, Universidade Federal do Rio Grande do Sul, Porto Alegre, RS, Brazil.
Título: | Negative effects of an invasive grass, but not of native grasses, on plant species richness along a cover gradient.
Año de publicación: | 2018
Fuente/Imprenta: | Austral Ecology, 2018. aec12644.
Páginas: | 6 p.
DOI: | 10.1111/aec.12644
Idioma: | Inglés
Notas: | Article history: Accepted for publication June 2018.

Contenido:

Abstract:
Impacts of invasive plants on plant communities are not universal, and effects may differ depending on the life form of the invading species. At three sites in the Brazilian Pampa region, we assessed the effects of invasion by Eragrostis plana Nees, considered to be the most problematic invasive plant in South Brazilian grasslands, on local plant communities. Specifically, we evaluated effects on species richness, community evenness and richness of principal functional groups along an invasion gradient. Based on plant community data, we also evaluated the effects of dominant native species on the same plant community features, thus being able to assess the relative impacts of an invasive species compared to abundant native species. Eragrostis plana invasion reduced total plant richness, with some distinct effects regarding plant functional groups, and differently from other coexisting native species that did not show the same effects even when of high abundance. Grasses were the most affected plant group when E. plana cover increased, consistent with the limiting similarity hypothesis. Overall, our results indicate clear negative effects of this invasive plant on the grassland communities. Comparing the effects of an invasive species to those of coexisting natives is crucial for disentangling the real impact of an invader. Our results demonstrate that effects are consequence of species identity, and not only of high abundances.

Palabras-Clave: | BRAZIL; CAPIM-ANNONI; ERAGROSTIS PLANA; EXOTIC GRASS; GRASSLAND; IMPACT; INVASIVE PLANTS.
Categoría del tema: | H60 Malezas y escardas
Registro original: | INIA Treinta y Tres (TT)
Ejemplares: | TT - (102931-1) - ADD - AP - DD - PP/Austral-Ecology/2018 -  -  - DIS