Invasive Exotic Species in the Sonoran Region

2003 ◽  
Vol 56 (2) ◽  
pp. 203
Author(s):  
David L. Scarnecchia ◽  
Barbara Tellman
Keyword(s):  
Exotic Species ◽  
Invasive Exotic Species ◽  
Invasive Exotic

scholarly journals Alien plant species on roadsides of the northwestern Patagonian steppe (Argentina)

PLoS ONE ◽  
2021 ◽  
Vol 16 (2) ◽  
pp. e0246657
Author(s):  
Giselle Ailin Chichizola ◽  
Sofía Laura Gonzalez ◽  
Adriana Edit Rovere
Keyword(s):  
Exotic Species ◽  
Plant Species ◽  
Seed Bank ◽  
Native Species ◽  
Seed Banks ◽  
Patagonian Steppe ◽  
Invasive Exotic Species ◽  
Perennial Herbs ◽  
Invasive Exotic ◽  
Reference Areas

The introduction of alien species represents one of the greatest threats to biodiversity worldwide. Highway construction increases the dispersal and invasion of exotic plant species. This study examined the assembly process of the plant communities to determine whether the roadsides of the Patagonian steppe represent a reservoir and dispersal source of invasive exotic species. We analyzed the composition of exotic and native species and functional groups present in the established vegetation and seed banks of roadsides and reference areas nearby. The type of dispersal of exotic and native species at the roadsides was also evaluated. Total cover and that of exotic and native species was lower at the roadsides than in the reference areas; however, at the roadsides the cover and seed abundance of exotic species was higher than that of native species. In the roadsides vegetation, native shrubs such as Acaena splendens predominated, along with exotic perennial herbs and grasses which were mainly represented by Rumex acetosella. In the seed bank the predominant species were exotic perennial herbs, also represented by R. acetosella, annual exotic species such as Epilobium brachycarpum and Verbascum thapsus, and annual native species such as Heliotropium paronychioides. No exotic shrubs were found either at the roadsides or in the reference areas. The species at the roadsides did not present a dominant type of dispersal. The abundance of exotic species at the roadsides, both in the aboveground vegetation and the seed bank, may be due to the stressful environment and the characteristics of the species themselves, such as the ability to form seed banks. This work revealed that the roadsides of the Patagonian steppe constitute reservoirs of invasive exotic species, highlighting the importance of identifying them and controlling their spread, with a view to generating ecosystem management programs.

Ocorrência do Caramujo Africano Achatina Fulica (Bowdich, 1822) em Várzea Grande-MT: Estudo de Caso na Sede do Ministério da Agricultura

UNICIÊNCIAS ◽  
2017 ◽  
Vol 21 (2) ◽  
pp. 93
Author(s):  
Maria Aparecida Da Silva Alves ◽  
Neiva Sales Rodrigues ◽  
Renata Freitag ◽  
Jakson Bofinger
Keyword(s):  
Exotic Species ◽  
Rainy Season ◽  
Achatina Fulica ◽  
The Public ◽  
Public Body ◽  
Invasive Exotic Species ◽  
Main Period ◽  
Invasive Exotic

O objeto de estudo é o Achatina fulica (Bowdich, 1822), uma espécie exótica introduzida no Brasil, frequentemente encontrada em ambientes antrópicos. Esse trabalho tem por objetivo verificar a ocorrência do caramujo africano (A. fulica) na área do Ministério da Agricultura, Várzea Grande/ MT, e investigar os conhecimentos da população sobre o molusco. Utilizou-s  como metodologia a observação durante dois meses, entre 05h00min e 06h00min da manhã, horário de maior atividade do molusco, e foi aplicado um questionário composto por dez perguntas sobre o molusco aos residentes próximos da área de cultivo das hortaliças, e aos funcionários do órgão público. Os resultados demonstraram que o público-alvo possui pouca informação sobre o caramujo africano; 64% disseram que não conhecem o molusco, 36,2% dos entrevistados não sabiam que esses animais podem causar doenças, 83,33% desconheciam a alimentação de A. fulica, 83% responderam que os animais eram mais visualizados no período chuvoso e 47,22% responderam que não acreditavam na existência de um método de controle eficaz. O desenvolvimento de estratégias eficientes para o controle e erradicação de A. Fulica, fundamentalmente, deve contar com envolvimento da sociedade em parceria com o Poder Público.Palavras-chave: Espécies Invasoras Exóticas. Molusco. Informação.AbstractThe Giant African Snail, Achatina fulica, is an exotic species introduced in Brazil, often found in anthropic environments. This study aimed to verify the occurrence of A. fulica in the area of the Ministry of Agriculture, Várzea Grande-MT, and investigate the knowledge of the population about themollusk. The methodology considered the mollusks observation for two months, between 5-6 am, considered the main period of snails activity, and a questionnaire was applied which was composed of 10 questions about the mollusk considering the residents that live nearby, and employees of the public body. The results showed that respondents have low information about the Giant African Snail, 64% said did not know the mollusk, 36.2 % did not know that these mollusks can cause disease, 83.33 % were unaware of the mollusks alimentary items, 83 % answered that the animals were most viewed in the rainy season and 47.22 % answered that they did not recognize any effective method of control. For the development of efficient strategies for A. fulica control is fundamental the involvement of society in partnership with the government.Keywords: Invasive Exotic Species. Mollusk. Information.

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