scholarly journals Trichocera maculipennis (Diptera)—an invasive species in Maritime Antarctica

PeerJ ◽  
2018 ◽  
Vol 6 ◽  
pp. e5408 ◽  
Author(s):  
Marta Potocka ◽  
Ewa Krzemińska
Keyword(s):  
Invasive Species ◽  
Native Species ◽  
Substrate Surface ◽  
First Record ◽  
King George Island ◽  
Maritime Antarctica ◽  
Bay Area ◽  
Rapid Spread ◽  
Mode Of Life ◽  
South Shetlands

Antarctica, with its severe conditions, is poor in terrestrial fauna species. However, an increase in human presence together with climate change may cause an influx of non-native species. Here we report a significant increase in colonized area of one of the few known invasive species to date in Antarctica. Non-native flies of Trichocera maculipennis have been recently observed in the Admiralty Bay area on King George Island, South Shetlands Islands, West Antarctica, 10 years after its first record in Maritime Antarctica (Maxwell Bay, King George Island). Its rapid spread across the island, despite geographic barriers such as glaciers, indicates successful adaptation to local environmental conditions and suggests this species is invasive. The mode of life of T. maculipennis, observed in natural and anthropogenous habitat and in laboratory conditions, is reported. The following adaptations enabled its invasion and existence within the sewage system in Antarctic scientific stations: the ability to survive in complete darkness, male ability to mate on the substrate surface without prior swarming in flight, and adaptation of terrestrial larvae to survive in semi-liquid food. Possible routes of introduction to Antarctica and between two bays on King George Island are discussed, as well as further research leading to the containment and eradication of this species.

scholarly journals The pig of the Lençóis Maranhenses, first record of wild boar (Sus scrofa) in Maranhão State, Brazil

Check List ◽  
2019 ◽  
Vol 15 (4) ◽  
pp. 1-1
Author(s):  
Gilberto Nepomuceno Salvador ◽  
Nathali Garcia Ristau ◽  
Isabel Sanches da Silva ◽  
André Nunes
Keyword(s):  
Invasive Species ◽  
Wild Boar ◽  
Sus Scrofa ◽  
Native Species ◽  
National Park ◽  
First Record ◽  
Negative Effects ◽  
The World

The wild boar is one of the most dangerous invasive species. It is widespread in the world, including records for many Brazilian states. However, there is a lack of record from Maranhão state. In the present study, we reported a population of wild boar inside the Lençóis Maranhenses National Park, in Barrerinhas county, State of Maranhão. We discuss about the negative effects of this introduction on native species, including a record of predation by wild boar in nests of endangered turtles.

scholarly journals First record of the endophytic bacteria of Deschampsia antarctica E. Desv. from two distant localities of the maritime Antarctica

2019 ◽  
Author(s):  
O. Podolich ◽  
I. Parnikoza ◽  
T. Voznyuk ◽  
G. Zubova ◽  
I. Zaets ◽  
...  
Keyword(s):  
Endophytic Bacteria ◽  
Vascular Plant ◽  
First Record ◽  
Deschampsia Antarctica ◽  
Rrna Gene ◽  
King George Island ◽  
Maritime Antarctica ◽  
Pcr Screening ◽  
Specific Pcr ◽  
The 16S Rrna Gene

AbstractThe vascular plant Deschampsia antarctica samples were collected for endophytic bacteria study from two regions in the maritime Antarctic 400 km distant from one another: Point Thomas oasis (King George Island) and Argentine Islands (Galindez Island). The endophytes were isolated from roots and leaves of D. antarctica, cultivated and identified by using a partial sequencing of the 16S rRNA gene served as a phylomarker. Endophyte isolates from two sites of Galindez Island were represented mainly by Pseudomonas species and by Gammaproteobacteria, Firmicutes and Actinobacteria. The vast majority of the isolates had specific for endophytes cellulase and pectinase activities, however, Bacillus spp. did not express both activities. A group-specific PCR screening at the four sites of Galindez Island and two sites of King George Island, indicated Alphaproteobacteria, Betaproteobacteria, Gammaproteobacteria, Firmicutes, Cytophaga-Flavobacteria and Actinobacteria. Notably, the number of endophytic bacteria taxa was significantly larger in leaves than in roots of plants.

scholarly journals Ecology and distribution of the Amur Chebachok  Pseudorasbora parva (Temminck et Schlegel, 1846)  as a biologically invasive species in the delta and estuarine  coast of the river Don

2019 ◽  
Vol 14 (3) ◽  
pp. 6-16
Author(s):  
A. V. Starsev ◽  
A. A. Korchunov ◽  
N. I. Rabazanov ◽  
R. N. Rabazanov
Keyword(s):  
Invasive Species ◽  
Native Species ◽  
Local Population ◽  
Research Work ◽  
Linear Structure ◽  
High Survival ◽  
Pseudorasbora Parva ◽  
Migratory Activity ◽  
Rapid Spread ◽  
Food Competitor

Aim. To analyze the results of ichthyological monitoring in order to identify the role  of an invasive fish species, Pseudorasbora parva – known in Russia as the Amur Chebachok – in the ichthyological community of the River Don estuary littoral and delta.   Material and Methods. Research work was carried out in the prodelta and estuarine  watercourses of the Don delta in the period 2007‐2017. To catch the fish, we used  bimtral, drag nets, gill nets and other fishing gear. Standard methods were applied to  process ichthyological material. A total of 902 specimens of the Amur chebachok  were examined.   Results. The general characteristics of the invasive species from watercourses of the  delta and from Taganrog Bay are given. Its role in the formation of ichthyofauna and  its relationship with native species in new habitats has been determined. Dimensionmass indicators and other biological parameters of the species are given.  Conclusion. The linear structure of the local population of the Amur chebachok consists of different size groupings corresponding to certain ages. The process of acclimatization of the Amur chebachok in the Don delta is associated with certain interactions with elements of the local biocenosis. It was proved that when there is a high  number, both in pond farms and in natural water bodies, the species is an acute food  competitor to juveniles of both farmed or local fish. Its rapid spread is due to the  high survival rate of offspring, high environmental plasticity, rapid growth, short  puberty and the migratory activity of larvae and fry.  

scholarly journals First record of non-native Xiphophorus maculatus (Günther, 1866) (Cyprinodontiformes, Poeciliidae) in the state of Maranhão, northeastern Brazil

Check List ◽  
2021 ◽  
Vol 17 (6) ◽  
pp. 1615-1622
Author(s):  
Felipe Polivanov Ottoni ◽  
Erick Cristofore Guimarães ◽  
Jadson Pinheiro Santos ◽  
Pâmella Silva de Brito ◽  
Josie South ◽  
...  
Keyword(s):  
Invasive Species ◽  
Native Species ◽  
First Record ◽  
The State ◽  
Northeastern Brazil ◽  
Xiphophorus Maculatus ◽  
Negative Impacts

During a field expedition in 2020, we recorded specimens of an invasive platy fish, Xiphophorus maculatus, in the state of Maranhão, Brazil. This new occurrence, in the Municipality of São Luis, is only the second time that this non-native species has been found in northeastern Brazil. We provide an updated list of all invasive species recorded from the island of São Luís, highlighting the negative impacts they may confer for the native biodiversity.

scholarly journals New records reveal rapid geographic expansion of Bombus terrestris Linnaeus, 1758 (Hymenoptera: Apidae), an invasive species in Argentina

Check List ◽  
2015 ◽  
Vol 11 (3) ◽  
pp. 1620 ◽  
Author(s):  
Benoît Geslin ◽  
Carolina L. Morales
Keyword(s):  
Invasive Species ◽  
Native Species ◽  
New Records ◽  
Bombus Terrestris ◽  
First Record ◽  
Rapid Decline ◽  
Widespread Species ◽  
Geographic Expansion ◽  
First Time

Bombus terrestris Linnaeus is an invasive bumblebee in Argentina. Since its first record in March 2006, B. terrestris has rapidly become the most widespread species in the southern Argentina’s Patagonia. The explosion of B. terrestris populations has been associated with the rapid decline of the unique native species B. dahlbomii, Guérin-Méneville. However, B. terrestris had never been yet reported farther south than the 50° parallel. We report for the first time the presence of B. terrestris at the southern end of continental Patagonia and discuss its meaning with regards on potential consequences for B. dahlbomii populations.

High predatory efficiency and abundance drive expected ecological impacts of a marine invasive fish

2020 ◽  
Vol 637 ◽  
pp. 195-208 ◽  
Author(s):  
EM DeRoy ◽  
R Scott ◽  
NE Hussey ◽  
HJ MacIsaac
Keyword(s):  
Invasive Species ◽  
Native Species ◽  
Ecological Impact ◽  
Marine Species ◽  
Ecological Impacts ◽  
Negative Effects ◽  
Marine Predator ◽  
Eastern Gulf Of Mexico ◽  
Red Grouper ◽  
Per Capita

The ecological impacts of invasive species are highly variable and mediated by many factors, including both habitat and population abundance. Lionfish Pterois volitans are an invasive marine species which have high reported detrimental effects on prey populations, but whose effects relative to native predators are currently unknown for the recently colonized eastern Gulf of Mexico. We used functional response (FR) methodology to assess the ecological impact of lionfish relative to 2 functionally similar native species (red grouper Epinephelus morio and graysby grouper Cephalopholis cruentata) foraging in a heterogeneous environment. We then combined the per capita impact of each species with their field abundance to obtain a Relative Impact Potential (RIP). RIP assesses the broader ecological impact of invasive relative to native predators, the magnitude of which predicts community-level negative effects of invasive species. Lionfish FR and overall consumption rate was intermediate to that of red grouper (higher) and graysby grouper (lower). However, lionfish had the highest capture efficiency of all species, which was invariant of habitat. Much higher field abundance of lionfish resulted in high RIPs relative to both grouper species, demonstrating that the ecological impact of lionfish in this region will be driven mainly by high abundance and high predator efficiency rather than per capita effect. Our comparative study is the first empirical assessment of lionfish per capita impact and RIP in this region and is one of few such studies to quantify the FR of a marine predator.

scholarly journals Long Term Interactions of Native and Invasive Species in a Marine Protected Area Suggest Complex Cascading Effects Challenging Conservation Outcomes

Diversity ◽  
2021 ◽  
Vol 13 (2) ◽  
pp. 71
Author(s):  
Charalampos Dimitriadis ◽  
Ivoni Fournari-Konstantinidou ◽  
Laurent Sourbès ◽  
Drosos Koutsoubas ◽  
Stelios Katsanevakis
Keyword(s):  
Invasive Species ◽  
Native Species ◽  
High Performance ◽  
Marine Protected Area ◽  
Habitat Degradation ◽  
Population Increase ◽  
Rocky Reef ◽  
Cascading Effects ◽  
High Level

Understanding the interactions among invasive species, native species and marine protected areas (MPAs), and the long-term regime shifts in MPAs is receiving increased attention, since biological invasions can alter the structure and functioning of the protected ecosystems and challenge conservation efforts. Here we found evidence of marked modifications in the rocky reef associated biota in a Mediterranean MPA from 2009 to 2019 through visual census surveys, due to the presence of invasive species altering the structure of the ecosystem and triggering complex cascading effects on the long term. Low levels of the populations of native high-level predators were accompanied by the population increase and high performance of both native and invasive fish herbivores. Subsequently the overgrazing and habitat degradation resulted in cascading effects towards the diminishing of the native and invasive invertebrate grazers and omnivorous benthic species. Our study represents a good showcase of how invasive species can coexist or exclude native biota and at the same time regulate or out-compete other established invaders and native species.

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