Insight on the native range of Coptotermes formosanus and its becoming an invasive alien species

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.

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Achatina fulica (giant African land snail).

10.1079/cpc.2640.20210102948 ◽

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).

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Suggestions for the Improvement of the Invasive Alien Species Management in Korea - A Comparative Analysis of the Legal Framework for Invasive Alien Species between Japan and Korea

Journal of Environmental Policy and Administration ◽

10.15301/jepa.2013.06.21.2.35 ◽

2013 ◽

Cited By ~ 5

Author(s):

Saeromi Mun

Keyword(s):

Comparative Analysis ◽

Alien Species ◽

Invasive Alien Species ◽

Legal Framework ◽

Species Management

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Achieving Aichi biodiversity targets: Prevention, control, or eradication of invasive alien species that threaten biodiversity, agricultural production, and human well-being

10.1603/ice.2016.93650 ◽

2016 ◽

Author(s):

Junko Shimura

Keyword(s):

Alien Species ◽

Agricultural Production ◽

Invasive Alien Species ◽

Well Being ◽

Aichi Biodiversity Targets

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Invasive alien species in China: the current situation, problems and possible solutions

Advances in Earth and Environmental Sciences ◽

10.2495/icesep131351 ◽

2013 ◽

Author(s):

Congcong Xu

Keyword(s):

Alien Species ◽

Invasive Alien Species ◽

Current Situation

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

Sustainability ◽

10.3390/su13116152 ◽

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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