scholarly journals Improved detection of an alien invasive species through environmental DNA barcoding: the example of the American bullfrogLithobates catesbeianus

2012 ◽  
Vol 49 (4) ◽  
pp. 953-959 ◽  
Author(s):  
Tony Dejean ◽  
Alice Valentini ◽  
Christian Miquel ◽  
Pierre Taberlet ◽  
Eva Bellemain ◽  
...  
Keyword(s):  
Invasive Species ◽  
Dna Barcoding ◽  
Environmental Dna ◽  
Alien Invasive Species

scholarly journals Demographics of Eucalyptus grandis and implications for invasion

Koedoe ◽  
2017 ◽  
Vol 59 (1) ◽  
Author(s):  
Kudakwashe Musengi ◽  
Sally Archibald
Keyword(s):  
Invasive Species ◽  
Eucalyptus Grandis ◽  
Reproductive Traits ◽  
Alien Invasive Species ◽  
Rate Of Spread ◽  
Invasion Stage ◽  
The Future ◽  
Plantation Species ◽  
Negative Impacts ◽  
Almost All

Alien invasive species can have negative impacts on the functioning of ecosystems. Plantation species such as pines have become serious invaders in many parts of the world, but eucalypts have not been nearly as successful invaders. This is surprising considering that in their native habitat they dominate almost all vegetation types. Available theory on the qualities that characterise invasive species was used to assess the invasive potential of Eucalyptus grandis – a common plantation species globally. To determine rates of establishment of E. grandis outside plantations, we compared population demographics and reproductive traits at two locations in Mpumalanga, South Africa: one at higher elevation with more frost. Eucalyptus grandis has a short generation time. We found no evidence that establishment of E. grandis was limiting its spread into native grassland vegetation, but it does appear that recruitment is limited by frost and fire over much of its range in Mpumalanga. Populations at both study locations displayed characteristics of good recruitment. Size class distributions showed definite bottlenecks to recruitment which were more severe when exposed to frost at higher elevations. Generally, the rate of spread is low suggesting that the populations are on the establishing populations’ invasion stage. This research gives no indication that there are any factors that would prevent eucalyptus from becoming invasive in the future, and the projected increase in winter temperatures should be a cause for concern as frost is currently probably slowing recruitment of E. grandis across much of its planted range.Conservation implications: Eucalyptus plantations occur within indigenous grasslands that are of high conservation value. Frost and fire can slow recruitment where they occur, but there are no obvious factors that would prevent E. grandis from becoming invasive in the future, and monitoring of its rates of spread is recommended.

Use of DNA barcoding to detect invertebrate invasive species from diapausing eggs

2010 ◽  
Vol 13 (6) ◽  
pp. 1325-1340 ◽  
Author(s):  
Elizabeta Briski ◽  
Melania E. Cristescu ◽  
Sarah A. Bailey ◽  
Hugh J. MacIsaac
Keyword(s):  
Invasive Species ◽  
Dna Barcoding ◽  
Diapausing Eggs

scholarly journals Introducing the Global Register of Introduced and Invasive Species: challenges with classification

2018 ◽  
Vol 2 ◽  
pp. e25306
Author(s):  
Shyama Pagad
Keyword(s):  
Invasive Species ◽  
Alien Species ◽  
Alien Invasive Species ◽  
Validation And Verification ◽  
The World ◽  
Invasive Status

The Global Register of Introduced and Invasive Species (GRIIS) presents annotated country checklists of introduced and invasive species. Annotations include higher taxonomy of the species, synonyms, environment/system in which the species occurs, and its biological status in that country. Invasiveness is classified by evidenced impact in that country. Draft country checklists are subjected to a process of validation and verification by networks of country experts. Challenges encountered across the world include confusion with alien/invasive species terminology, classification of the ‘invasive’ status of an alien species and issues with taxonomic synonyms.

scholarly journals Development of species-specific Cichla species eDNA primers for alien invasive species (AIS) monitoring in Malaysia

2021 ◽  
Vol 4 ◽  
Author(s):  
O. Nurul Fizatul Nabilah ◽  
A. R. Ramizah ◽  
A. B. Adibah ◽  
S. Syazwan ◽  
A.G. Intan Faraha ◽  
...  
Keyword(s):  
Dna Sequences ◽  
Environmental Dna ◽  
Coi Gene ◽  
Alien Invasive Species ◽  
Survey Method ◽  
Specific Primers ◽  
Invasive Fishes ◽  
Specific Amplification ◽  
Species Specific ◽  
High Level

Peacock bass or the cichlids are known locally as top predator fishes which are invasive in Malaysia freshwater system. Detection probabilities for these fishes are typically low, especially using conventional capture-survey method due to the fish’s behaviour of hiding beneath the water’s surface. Hence, the environmental DNA (eDNA) monitoring is a relatively new approach that can be used to assess the distribution of these invasive fishes. Here, we report the strategy to develop small fragment (280- 400 bp) specific-specific primers for three selected invasive Cichla species namely, C. ocellaris, C. monoculus, and C. kelberi based on mitochondrial DNA (mtDNA) sequences. Current research showed that the developed species-specific primers from cytochrome oxidase I (COI) gene has high resolution at species level. Species-specific amplification tests also proved the specificity of the developed primers, securing the high- level species identification potential which may help in controlling the spread of alien invasive fish species.

scholarly journals Use of environmental DNA (eDNA) in streams to detect feral swine (Sus scrofa)

PeerJ ◽  
2020 ◽  
Vol 8 ◽  
pp. e8287
Author(s):  
Amberly N. Hauger ◽  
Karmen M. Hollis-Etter ◽  
Dwayne R. Etter ◽  
Gary J. Roloff ◽  
Andrew R. Mahon
Keyword(s):  
Invasive Species ◽  
Water Temperature ◽  
Linear Model ◽  
Detection Probability ◽  
Generalized Linear Model ◽  
Environmental Dna ◽  
The United States ◽  
Stream Data ◽  
Feral Swine ◽  
Animal Populations

Invasive feral swine can damage ecosystems, disrupt plant and animal populations, and transmit diseases. Monitoring of feral swine populations requires expensive and labor-intensive techniques such as aerial surveys, field surveys for sign, trail cameras, and verifying landowner reports. Environmental DNA (eDNA) provides an alternative method for locating feral swine. To aid in detection of this harmful invasive species, a novel assay was developed incorporating molecular methods. From August 2017 to April 2018, water samples and stream data were collected along 400 m transects in two different stream types where swine DNA was artificially introduced to investigate potential factors affecting detection. A generalized linear model (family binomial) was used to characterize environmental conditions affecting swine DNA detection; detection was the dependent variable and stream measurements included stream type, distance downstream, water temperature, velocity, turbidity, discharge, and pH as independent variables. Parameters from the generalized linear model were deemed significant if 95% confidence intervals did not overlap 0. Detection probability for swine DNA negatively related to water temperature (β =  − 0.21, 95% CI [−0.35 to −0.09]), with the highest detection probability (0.80) at 0 °C and lowest detection probability (0.05) at 17.9 °C water temperature. Results indicate that sampling for swine eDNA in free-flowing stream systems should occur at lower water temperatures to maximize detection probability. This study provides a foundation for further development of field and sampling techniques for utilizing eDNA as a viable alternative to monitoring a terrestrial invasive species in northern regions of the United States.

Alien Invasive Elements of Upper Ganga Ramsar Site, Uttar Pradesh, India

2015 ◽  
Vol 38 (4) ◽  
pp. 383-386
Author(s):  
Arti Garg ◽  
Vineet Singh
Keyword(s):  
Invasive Species ◽  
Invasive Alien Species ◽  
Uttar Pradesh ◽  
Habitat Conservation ◽  
Alien Invasive Species ◽  
Indigenous Species ◽  
Ramsar Site ◽  
Wetland Ecosystem ◽  
Wetland Biodiversity ◽  
The Family

Invasive alien species of Upper Ganga Ramsar Site in Uttar Pradesh and their impact on the wetland ecosystem is discussed. In all 69 alien invasive species under 58 genera and 32 families were recorded of which there were 55 herbs, 5 climbers/twiners, 5 shrubs, 2 undershrubs and 2 tree species. The alien invasives of American origin dominated while the family Asteraceae showed maximum representation. It is inferred that stringent measures need to be adopted for combating the spread of alien invasives in order to conserve the wetland biodiversity and loss of indigenous species for habitat conservation.

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