Achatina fulica (giant African land snail).

2021 ◽  
Author(s):  
Roberto E Vogler ◽  
Ariel A Beltramino
Keyword(s):  
Developmental Stage ◽  
Alien Species ◽  
Food Source ◽  
Invasive Alien Species ◽  
Land Snail ◽  
Achatina Fulica ◽  
Native Range ◽  
World Conservation ◽  
Plant Pest ◽  
The World

Abstract The giant African land snail A. fulica is a fast-growing polyphagous plant pest that has been introduced from its native range in East Africa to many parts of the world as a commercial food source (for humans, fish and livestock) and as a novelty pet. It easily becomes attached to any means of transport or machinery at any developmental stage, is able to go into a state of aestivation in cooler conditions and so is readily transportable over distances. Once escaped it has managed to establish itself and reproduce prodigiously in tropical and some temperate locations. As a result, A. fulica has been classified as one of the world's top 100 invasive alien species by The World Conservation Union, IUCN (ISSG, 2003).

scholarly journals Current State of Knowledge on Invasive and Alien Fauna of Nepal

2015 ◽  
Vol 20 (1) ◽  
pp. 68-81 ◽  
Author(s):  
Prem Bahadur Budha
Keyword(s):  
Alien Species ◽  
Oryctolagus Cuniculus ◽  
Invasive Alien Species ◽  
Oreochromis Mossambicus ◽  
Freshwater Prawn ◽  
Capra Hircus ◽  
Achatina Fulica ◽  
Agricultural Pests ◽  
Current State ◽  
The World

This study produced a comprehensive list of introduced fauna of Nepal. Of the sixty four species of alien fauna reported, there were seven species of mammals with forty improved breeds of cow, buffalo, goat, sheep and pig, six species of birds with eight breeds of chicken and duck, nineteen species of fish, twenty two species of arthropods including one species of freshwater prawn and twenty one species of insects, nine species of molluscs and one species of platyhelminths. Among reported alien species Achatina fulica, Capra hircus, Clarius batrachus, Cyprinus carpio, Gambusia affinis, Oncorynchus mykiss, Oreochromis mossambicus, Oryctolagus cuniculus, Platydemus manokwari, and Sus scrofa are considered the worst species of the world and listed in ‘100 of the World’s Worst Invasive Alien Species’. The impacts of all these serious animals in Nepal are still to be studied but some problematic species of agricultural pests, freshwater habitat as well as livestock breeds are discussed in this paper.Journal of Institute of Science and Technology, 2015, 20(1): 68-81

Sphagneticola trilobata (wedelia).

2021 ◽  
Author(s):  
Julissa Rojas-Sandoval ◽  
Pedro Acevedo-Rodríguez ◽  
Chris Parker
Keyword(s):  
Alien Species ◽  
Invasive Alien Species ◽  
Exotic Plant ◽  
Native Flora ◽  
Plant Pest ◽  
Ornamental Species

Abstract S. trilobata has spread rapidly threatening the native flora after introduction as an ornamental species. It can spread vegetatively and is difficult to eradicate. The IUCN has listed S. trilobata in its 100 of the world's worst invasive alien species and the Florida Exotic Plant Pest Council classified it as a category II invader. This species continues to be available as an ornamental and is therefore likely to spread further.

Emerging natural hybrid between Invasive Species and Native Congener of Emilia (Asteraceae) Found in Northern Taiwan

Phytotaxa ◽  
2018 ◽  
Vol 382 (2) ◽  
pp. 204
Author(s):  
JEN-YU WANG ◽  
JENN-CHE WANG
Keyword(s):  
Invasive Species ◽  
Flow Cytometry ◽  
Alien Species ◽  
Invasive Plants ◽  
Invasive Alien Species ◽  
Pollen Viability ◽  
Natural Hybridization ◽  
Natural Hybrid ◽  
The World ◽  
Northern Taiwan

Invasive plants had raised lots of concern about the environment and biodiversity. Many members of Asteraceae are notorious invasive alien species across the world. In Taiwan, Emilia (Asteraceae) contains one native and two naturalized species. Recently, we found some morphologically intermediate individuals between the native E. sonchifolia var. javanica and the alien E. praetermissa from northern Taiwan where the latter two grow sympatrically. Based on morphological comparisons, pollen viability and flow cytometry information, we confirmed the fact of natural hybridization. Herein, we describe a new hybrid Emilia ×latens J.-Y Wang & J.-C. Wang and provide a key to Emilia species in Taiwan.

scholarly journals Habitat selection patterns of a species at the edge – case study of the native racer goby population in Central Europe

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Krzysztof Kukuła ◽  
Bernadetta Ortyl ◽  
Aneta Bylak
Keyword(s):  
Habitat Selection ◽  
Alien Species ◽  
Invasive Alien Species ◽  
Water Current ◽  
Native Range ◽  
Geographic Scale ◽  
Range Edge ◽  
River Reach ◽  
Edge Populations

AbstractInvasive alien species are regarded a nuisance. This extends into a lack of conservation efforts in their native range. As a consequence, conservation of e.g. range-edge populations is neglected. Gobiidae have many representatives of alien species in European freshwaters, and therefore they have a bad reputation. Objectives of this study were to: define the habitat selection patterns of a species at the edge, and examine the ontogenetic variation in its distributions, i.e. spatial distribution of different size classes. A racer goby Babka gymnotrachelus (syn. Neogobius gymnotrachelus) population was selected for the model. In numerous European river basins, Ponto-Caspian racer goby has been an invasive alien species of interest to researchers for many years. Recently, however, native populations of the species have been described in the Polish tributary of the upper Dniester River (Black Sea basin). We used habitat data and densities of racer goby to disentangle the habitat selection patterns of the species at a river reach at the edge of its native range. Evident preferences towards habitats with large submerged objects serving as hiding places were characteristic of the largest gobies. Adult, largest gobies were very likely to choose the ‘boulders’ site, while forcing smaller individuals to occupy places with faster water current, i.e. less suitable in terms of saving energy. At a larger geographic scale, a significant portion of the submountain river was unsuitable for racer gobies. At the edge of the racer goby range, patches providing habitats suitable for the species were scarce and scattered. With regard to invasive populations, the presence of stony bottoms, quite certainly cannot be considered as a factor excluding potential colonisation by racer goby, and in submountain rivers it might be the preferred kind of bottom.

scholarly journals On Darwin’s Steps: Citizen Science Can Help Keep an Eye on Alien Species

2021 ◽  
Vol 9 ◽  
Author(s):  
Ioannis Giovos ◽  
Anastasia Charitou ◽  
Eugenio Gervasini ◽  
Celia López-Cañizares ◽  
Konstantinos Tsiamis ◽  
...  
Keyword(s):  
Alien Species ◽  
European Commission ◽  
Citizen Science ◽  
Native Species ◽  
Invasive Alien Species ◽  
Information Network ◽  
Citizen Scientist ◽  
The World

Citizens around the world can act like scientists by providing important information about biodiversity that can help scientists’ research. The same applies to species that expand from their areas of origin to other places, often creating problems for the native species. Nowadays, there are plenty of projects that involve citizen scientists in the monitoring of alien species and biodiversity. The European Alien Species Information Network (EASIN) of the European Commission gathers data from several projects and has developed its own app that enables people to report observations of invasive alien species. So, are you ready to become a citizen scientist?

scholarly journals Introduction and Spread of the Invasive Alien Species Ageratina altissima in a Disturbed Forest Ecosystem

2021 ◽  
Vol 13 (11) ◽  
pp. 6152
Author(s):  
Eunyoung Kim ◽  
Jaeyong Choi ◽  
Wonkyong Song
Keyword(s):  
Land Use ◽  
South Korea ◽  
Alien Species ◽  
Invasive Alien Species ◽  
Management Policy ◽  
Economic Damage ◽  
Forest Edges ◽  
Forest Interior ◽  
Lower Elevation ◽  
Canopy Area

Invasive alien species (IAS) not only displace nearby indigenous plants and lead to habitat simplification but also cause severe economic damage by invading arable lands. IAS invasion processes involve external forces such as species characteristics, IAS assemblage traits, environmental conditions, and inter-species interactions. In this study, we analyzed the invasion processes associated with the introduction and spread of Ageratina altissima, a representative invasive plant species in South Korea. We investigated 197 vegetation quadrats (2 × 20 m) in regions bordering 47 forests in southern Seoul and Gyeonggi-do, South Korea. A total of 23 environmental variables were considered, which encompassed vegetation, topography, land use, and landscape ecology indices. The model was divided into an edge and an interior model and analyzed using logistic regression and a decision tree (DT) model. The occurrence of Ageratina altissima was confirmed in 61 sites out of a total of 197. According to our analysis, Ageratina altissima easily invaded forest edges with low density. The likelihood of its occurrence increased with lower elevation and gentler slope. In contrast, the spread of Ageratina altissima in the forest interior, especially based on seed spread and permeability, was favored by a lower elevation and gentler slopes. The analysis of Ageratina altissima settlement processes in forest edges coupled with the DT model demonstrated that land characteristics, such as the proximity to urbanized areas and the number of shrub and tree species, play a pivotal role in IAS settlement. In the forest interior, Ageratina altissima did not occur in 68 of the 71 sites where the soil drainage was under 2.5%, and it was confirmed that the tree canopy area had a significant impact on forest spread. Based on these results, it can be assumed that Ageratina altissima has spread in South Korean forests in much the same way as other naturalized species. Therefore, vegetation management strategies for naturalized species should be developed in parallel with land use management policy in regions surrounding forest edges to successfully manage and control Ageratina altissima invasion.

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