Ficha de avaliação EICAT
Acacia dealbata
MO · Moderado
Avaliação histórica recuperada de registros do SIGEEI. A estrutura e os campos foram preservados; a confirmação permanece pendente.
Identificação e síntese
Taxonomia registrada
Classificação canônica recuperada da integração com o GBIF. O sistema explicita os níveis que a própria resposta do GBIF não informa.
Avaliação de impactos
1. Redução no desempenho de indivíduos da biota nativa
Resposta: Sim
Mecanismos selecionados: (1) Competição
Evidências por mecanismo
“In shrubland and oak forest, plant cover was higher in non-invaded than both transitional and invaded patches, whereas transition patches had higher plant cover than did invaded patches (Fig. 3) (…) Within each community, plant density in the non-invaded patch was significantly higher than that in both transitional and invaded patches, whereas transition patches had higher density than did invaded patches (Fig. 2).” (Lorenzo et al. 2012)
Referências: Lorenzo P, Pazos-Malvido E, Rubido-Bará M, Reigosa MJ, Luís González L (2012) Invasion by the leguminous tree Acacia dealbata (Mimosaceae) reduces the native understorey plant species in different communities. Australian Journal of Botany, 60, 669–675. http://dx.doi.org/10.1071/BT12036
2. Declínio no tamanho populacional de espécie nativa
Resposta: Sim
Mecanismos selecionados: (1) Competição,(9) Impacto químico no ecossistema
Evidências por mecanismo
“The non-invaded patch had significantly higher richness species than did both the invaded and transition patches (Fig. 1)” (Lorenzo et al. 2012) “A strong effect was also exerted on plant communities. Richness, diversity and total plant cover all showed lower values in the invaded than in non-invaded subplots, with transition generally in the middle’ (Lazzaro et al. 2014)
“We found that A. dealbata highly affected almost all the response variables we analyzed, thus impacting both abiotic and biotic compartments of the native ecosystem and acting through different ecological processes. Silver wattle invasion directly impacted soil properties through a general improvement in soil N availability, a higher litter layer accumulation leading to marginally higher TOC, and soil acidification.” (Lazzaro et al. 2014)
Referências: Lorenzo P, Pazos-Malvido E, Rubido-Bará M, Reigosa MJ, Luís González L (2012) Invasion by the leguminous tree Acacia dealbata (Mimosaceae) reduces the native understorey plant species in different communities. Australian Journal of Botany, 60, 669–675. http://dx.doi.org/10.1071/BT12036 Lazzaro L, Giuliani C, Fabiani A, Agnelli AE, Pastorelli R, Lagomarsino A, Benesperi R, Calamassi R, Foggi B (2014) Soil and plant changing after invasion: The case of Acacia dealbata in a Mediterranean ecosystem. Science of the Total Environment 497–498. http://dx.doi.org/10.1016/j.scitotenv.2014.08.014
3. Extinção local de população nativa
Resposta: Não
4. Reversibilidade da extinção local após remoção do táxon
Resposta: Nenhuma extinção registrada