scholarly journals Deciphering the worldwide invasion of the Asian long‐horned beetle: A recurrent invasion process from the native area together with a bridgehead effect

2019 ◽  
Vol 28 (5) ◽  
pp. 951-967 ◽  
Author(s):  
Marion Javal ◽  
Eric Lombaert ◽  
Tetyana Tsykun ◽  
Claudine Courtin ◽  
Carole Kerdelhué ◽  
...  
Keyword(s):  
Invasion Process ◽  
Horned Beetle

The size of the region occupied by one type in an invasion process

1976 ◽  
Vol 13 (02) ◽  
pp. 355-356 ◽  
Author(s):  
Aidan Sudbury
Keyword(s):  
Random Walk ◽  
Simple Random Walk ◽  
Rectangular Lattice ◽  
Invasion Process

Particles are situated on a rectangular lattice and proceed to invade each other's territory. When they are equally competitive this creates larger and larger blocks of one type as time goes by. It is shown that the expected size of such blocks is equal to the expected range of a simple random walk.

scholarly journals The role of host promiscuity in the invasion process of a seaweed holobiont

2021 ◽  
Author(s):  
Guido Bonthond ◽  
Till Bayer ◽  
Stacy A. Krueger-Hadfield ◽  
Nadja Stärck ◽  
Gaoge Wang ◽  
...  
Keyword(s):  
Microbial Communities ◽  
Beta Diversity ◽  
Common Garden ◽  
Plant Invasions ◽  
Invasion Process ◽  
Microbial Succession ◽  
Invasive Seaweed ◽  
Native Populations ◽  
Important Trait ◽  
Different Populations

AbstractInvasive species are co-introduced with microbiota from their native range and also interact with microbiota found in the novel environment to which they are introduced. Host flexibility toward microbiota, or host promiscuity, is an important trait underlying terrestrial plant invasions. To test whether host promiscuity may be important in macroalgal invasions, we experimentally simulated an invasion in a common garden setting, using the widespread invasive macroalga Agarophyton vermiculophyllum as a model invasive seaweed holobiont. After disturbing the microbiota of individuals from native and non-native populations with antibiotics, we monitored the microbial succession trajectories in the presence of a new source of microbes. Microbial communities were strongly impacted by the treatment and changed compositionally and in terms of diversity but recovered functionally by the end of the experiment in most respects. Beta-diversity in disturbed holobionts strongly decreased, indicating that different populations configure more similar –or more common– microbial communities when exposed to the same conditions. This decline in beta-diversity occurred not only more rapidly, but was also more pronounced in non-native populations, while individuals from native populations retained communities more similar to those observed in the field. This study demonstrates that microbial communities of non-native A. vermiculophyllum are more flexibly adjusted to the environment and suggests that an intraspecific increase in host promiscuity has promoted the invasion process of A. vermiculophyllum. This phenomenon may be important among invasive macroalgal holobionts in general.

Gill ectoparasite assemblages of two non-native Cichla populations (Perciformes, Cichlidae) in Brazilian reservoirs

2010 ◽  
Vol 85 (2) ◽  
pp. 185-191 ◽  
Author(s):  
F.H. Yamada ◽  
L.N. Santos ◽  
R.M. Takemoto
Keyword(s):  
Standard Length ◽  
Dominant Species ◽  
Parasite Species ◽  
Freshwater Fishes ◽  
Helminth Species ◽  
Species Loss ◽  
Invasion Process ◽  
Key Factors ◽  
Typical Pattern ◽  
Peacock Bass

AbstractThe gills of 41 Cichla piquiti and 39 C. kelberi from Itaipu and Lajes reservoirs, respectively, Brazil, were examined to describe the ectoparasite assemblages of these two non-native peacock-bass populations. All ectoparasite species of the two studied hosts (C. piquiti and C. kelberi) were dominant, but Ascocotyle sp. (metacercariae) was the prevalent (58.53%) and most abundant helminth species in C. piquiti hosts, while Sciadicleithrum ergensi was the dominant species in C. kelberi hosts. Gill ectoparasites of C. piquiti and C. kelberi showed a typical pattern of overdispersion or aggregation, which is commonly reported for many other freshwater fishes. Ectoparasite prevalence and abundance did not vary between host sexes of the two Cichla populations. The prevalence and abundance of Ascocotyle sp. were positively correlated with C. piquiti standard length (SL), but only the abundance of S. ergensi showed a positive correlation with C. kelberi SL. Although environmental differences between reservoirs might also have influenced the results, we anticipated that the presence of a close congener in Itaipu reservoir and the lack of other Cichla species in Lajes reservoir were the key factors to explain the contrasts between C. piquiti and C. kelberi gill ectoparasites. Overall, our results suggest that the trend of parasite species loss through the invasion process may have contributed to the establishment of non-native C. piquiti and C. kelberi populations in Brazilian reservoirs.

scholarly journals First record of the Long-horned Beetle Sarothrocera lowii White, 1846 (Cerambycidae: Lamiinae: Lamiini) from India

2012 ◽  
Vol 4 (7) ◽  
pp. 2709-2712 ◽  
Author(s):  
Hemant V. Ghate ◽  
Sophio Riphung ◽  
N.S.A. Thakur
Keyword(s):  
First Record ◽  
Horned Beetle

scholarly journals Human invasive trophoblasts transformed with simian virus 40 provide a new tool to study the role of PPAR  in cell invasion process

2003 ◽  
Vol 24 (8) ◽  
pp. 1325-1336 ◽  
Author(s):  
L. Pavan ◽  
A. Tarrade ◽  
A. Hermouet ◽  
C. Delouis ◽  
M. Titeux ◽  
...  
Keyword(s):  
Cell Invasion ◽  
Simian Virus 40 ◽  
Simian Virus ◽  
Invasion Process
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