scholarly journals Distinguishing contemporary hybridization from past introgression with post-genomic ancestry-informative SNPs in strongly differentiated Ciona species

2015 ◽  
Author(s):  
Sarah Bouchemousse ◽  
Cathy Liautard-Haag ◽  
Nicolas Bierne ◽  
Frédérique Viard
Keyword(s):  
Native Species ◽  
First Generation ◽  
Secondary Contact ◽  
Informative Snps ◽  
Adaptive Introgression ◽  
Sea Squirt ◽  
In The Wild ◽  
Ancient Gene ◽  
Shared Polymorphism

AbstractBiological introductions bring into contact species that can still hybridize. The evolutionary outcomes of such secondary contacts may be diverse (e.g. adaptive introgression from or into the introduced species) but are not yet well examined in the wild. The recent secondary contact between the non-native sea squirt Ciona robusta (formerly known as C. intestinalis type A) and its native congener C. intestinalis (formerly known as C. intestinalis type B), in the western English Channel, provides an excellent case study to examine. To examine contemporary hybridization between the two species, we developed a panel of 310 ancestry-informative SNPs from a population transcriptomic study. Hybridization rates were examined on 449 individuals sampled in 8 sites from the sympatric range and 5 sites from allopatric ranges. The results clearly showed an almost complete absence of contemporary hybridization between the two species in syntopic localities, with only one first generation hybrid and no other genotype compatible with recent backcrosses. Despite the almost lack of contemporary hybridization, shared polymorphisms were observed in sympatric and allopatric populations of both species. Furthermore, one allopatric population from SE Pacific exhibited a higher rate of shared polymorphisms compared to all other C. robusta populations. Altogether, these results indicate that the observed level of shared polymorphism is more probably the outcome of ancient gene flow spread afterwards at a worldwide scale. They also emphasise efficient reproductive barriers preventing hybridization between introduced and native species, which suggests hybridization should not impede too much the expansion and the establishment of the non-native species in its introduction range.

scholarly journals Adaptive Introgression across Semipermeable Species Boundaries between Local Helicoverpa zea and Invasive Helicoverpa armigera Moths

2020 ◽  
Vol 37 (9) ◽  
pp. 2568-2583 ◽  
Author(s):  
Wendy A Valencia-Montoya ◽  
Samia Elfekih ◽  
Henry L North ◽  
Joana I Meier ◽  
Ian A Warren ◽  
...  
Keyword(s):  
Invasive Species ◽  
Helicoverpa Armigera ◽  
Native Species ◽  
Species Boundaries ◽  
Secondary Contact ◽  
Pest Species ◽  
Pyrethroid Insecticides ◽  
Adaptive Introgression ◽  
Pest Outbreaks ◽  
Helicoverpa Armígera

Abstract Hybridization between invasive and native species has raised global concern, given the dramatic increase in species range shifts and pest outbreaks due to anthropogenic dispersal. Nevertheless, secondary contact between sister lineages of local and invasive species provides a natural laboratory to understand the factors that determine introgression and the maintenance or loss of species barriers. Here, we characterize the early evolutionary outcomes following secondary contact between invasive Helicoverpa armigera and native H. zea in Brazil. We carried out whole-genome resequencing of Helicoverpa moths from Brazil in two temporal samples: during the outbreak of H. armigera in 2013 and 2017. There is evidence for a burst of hybridization and widespread introgression from local H. zea into invasive H. armigera coinciding with H. armigera expansion in 2013. However, in H. armigera, the admixture proportion and the length of introgressed blocks were significantly reduced between 2013 and 2017, suggesting selection against admixture. In contrast to the genome-wide pattern, there was striking evidence for adaptive introgression of a single region from the invasive H. armigera into local H. zea, including an insecticide resistance allele that increased in frequency over time. In summary, despite extensive gene flow after secondary contact, the species boundaries are largely maintained except for the single introgressed region containing the insecticide-resistant locus. We document the worst-case scenario for an invasive species, in which there are now two pest species instead of one, and the native species has acquired resistance to pyrethroid insecticides through introgression.

Endangered Butterflies and their Non-Native Host Plants: Examining Shifting Values of Belonging in Restoration

2019 ◽  
Vol 3 (1) ◽  
pp. 1-9
Author(s):  
Robert M. Anderson ◽  
Amy M. Lambert
Keyword(s):  
Ecological Restoration ◽  
Native Species ◽  
Puget Sound ◽  
A Value ◽  
The Social ◽  
Remote Island ◽  
Scientific Truth ◽  
Native Host

The island marble butterfly (Euchloe ausonides insulanus), thought to be extinct throughout the 20th century until re-discovered on a single remote island in Puget Sound in 1998, has become the focus of a concerted protection effort to prevent its extinction. However, efforts to “restore” island marble habitat conflict with efforts to “restore” the prairie ecosystem where it lives, because of the butterfly’s use of a non-native “weedy” host plant. Through a case study of the island marble project, we examine the practice of ecological restoration as the enactment of particular norms that define which species are understood to belong in the place being restored. We contextualize this case study within ongoing debates over the value of “native” species, indicative of deep-seated uncertainties and anxieties about the role of human intervention to alter or manage landscapes and ecosystems, in the time commonly described as the “Anthropocene.” We interpret the question of “what plants and animals belong in a particular place?” as not a question of scientific truth, but a value-laden construct of environmental management in practice, and we argue for deeper reflexivity on the part of environmental scientists and managers about the social values that inform ecological restoration.

scholarly journals Spiritual and Religious Support for Underrepresented First-Generation, Low-Income (UFGLI) Students

Religions ◽  
2021 ◽  
Vol 12 (7) ◽  
pp. 548
Author(s):  
Elliott Ingersoll ◽  
Sophia Elliott ◽  
Stephanie Drcar
Keyword(s):  
Literature Review ◽  
Low Income ◽  
First Generation ◽  
Support Systems ◽  
Educational Experience ◽  
Religious Support ◽  
Religion And Spirituality ◽  
Minimal Support ◽  
Systemic Barriers

UFGLI students comprise 34% of the students enrolled in four-year universities. Unlike some students, UFGLI students face internal and systemic barriers throughout their educational experience and their struggles are often dismissed and disregarded. Working and raising a family while taking courses, minimal support systems, and financial struggles require students to optimize their resources. We explore the issues of UFGLI students and the importance of their spiritual and religious supports using a literature review and a case study. Religious and spiritual identities are resources that should be explored and supported by staff at university counselling centers. Affirming UFGLI students’ religious and spiritual identities and understanding how religion and spirituality work in their lives can assist these students in their acclimation to and success at university.

scholarly journals Monitoring Exotic Beetles with Inexpensive Attractants: A Case Study

Insects ◽  
2021 ◽  
Vol 12 (5) ◽  
pp. 462
Author(s):  
Enrico Ruzzier ◽  
Andrea Galli ◽  
Luciano Bani
Keyword(s):  
Native Species ◽  
Large Scale ◽  
Red Wine ◽  
Forest Type ◽  
Popillia Japonica ◽  
Complex Activity ◽  
Local Fauna ◽  
Apple Cider ◽  
Trap Placement

Detecting and monitoring exotic and invasive Coleoptera is a complex activity to implement, and citizen science projects can provide significant contributions to such plans. Bottle traps are successfully used in wildlife surveys and can also be adapted for monitoring alien species; however, a sustainable, large scale trapping plan must take into account the collateral catches of native species and thus minimize its impact on local fauna. In the present paper, we tested the use of bottles baited with standard food products that can be purchased in every supermarket and immediately used (apple cider vinegar, red wine, and 80% ethyl alcohol) in capturing exotic and invasive beetles in the area surrounding Malpensa Airport (Italy). In particular, we reduced the exposition type of the traps in each sampling round to three days in order to minimize native species collecting. We found a significant effect of the environmental covariates (trap placement, temperature, humidity, and forest type) in affecting the efficiency in catching target beetles. Nearly all invasive Nitidulidae and Scarabaeidae known to be present in the area were captured in the traps, with apple cider vinegar usually being the most effective attractant, especially for the invasive Popillia japonica.

Education as the Medium of Upward Mobility: The Case of Dooms of Jammu

2021 ◽  
pp. 097318492110070
Author(s):  
Amithy Jasrotia ◽  
Smriti Srivastava
Keyword(s):  
First Generation ◽  
Upward Mobility ◽  
Educational Institutions ◽  
Process Of Change ◽  
Detailed Case ◽  
Existing Structure ◽  
Course Of Study

The current study explores the multifaceted and entwined structure of constraints and spaces of the possibilities of moving ahead among the Dooms of Jammu, India, where the possibilities of upward mobility through education as a means have been observed. Interviews and detailed case study were done with eight cases. Four overlapping super-ordinate themes developed during the course of study: (a) challenges of different generation learners, (b) lack of different forms of capital, (c) dis-identification from own and emulating others and (d) mushrooming of hybrid and mimic generation. The participants experienced the very process of change and continuity through education in their lives. It is observed that education helped in converting the morphology of their existing structure. Each of the interviewee has some exclusive experiences to share, offering significant insights into their lives, struggles and their conditions. The results indicate that the first-generation learners have to face many obstacles. The study concludes that education gives better results under certain circumstances. The chances of low caste children performing better are higher if the educational institutions run with mixed batches with students belonging to all the sections of the society.

Integration of banana crop residues as biomass feedstock into conventional production of first‐generation fuel ethanol from sugarcane: a simulation‐based case study

2021 ◽  
Author(s):  
Priscila Katerine Souza ◽  
Rodrigo Battisti ◽  
Ozair Souza ◽  
Noeli Sellin ◽  
Ricardo Antonio Francisco Machado ◽  
...  
Keyword(s):  
First Generation ◽  
Crop Residues ◽  
Fuel Ethanol ◽  
Biomass Feedstock ◽  
Simulation Based ◽  
Conventional Production ◽  
Banana Crop

The Next Generation of Service Agreements for Publicly Owned Waste-to-Energy Facilities: Pinellas County Case Study

2007 ◽  
Author(s):  
Paul J. Stoller ◽  
Anthony LoRe ◽  
William Crellin ◽  
Robert Hauser
Keyword(s):  
First Generation ◽  
Lessons Learned ◽  
Waste To Energy ◽  
Next Generation ◽  
Procurement Process ◽  
Pinellas County ◽  
The Past ◽  
Operation And Maintenance ◽  
Service Agreement

This paper discusses one of the key lessons learned from administering the first generation of service agreements for public owners of waste-to-energy (WTE) facilities over the past 22 years and how those experiences were incorporated into a new service agreement for the operation and maintenance of Pinellas County’s 24 year old, 3,000 tpd WTE Facility to better protect the county’s interests. Additionally, a major issue raised by the operating companies during the competitive procurement process for continue operation of the facility is discussed and how that concern was addressed in the new service agreement is also presented. Capitalized words or terms used in this paper are defined within the new service agreement.

scholarly journals Corrigendum to “Insights into the physical aging in chalcogenide glasses: A case study of a first-generation As2Se3 binary glass” [Coord. Chem. Rev. 442 (2021) 213992]

2021 ◽  
Vol 449 ◽  
pp. 214213
Author(s):  
Shiv Kumar Pal ◽  
Neeraj Mehta ◽  
V.I. Mikla ◽  
A.A. Horvat ◽  
V.V. Minkovich ◽  
...  
Keyword(s):  
Chalcogenide Glasses ◽  
First Generation ◽  
Physical Aging ◽  
Binary Glass

scholarly journals The first unified inventory of non-native fishes of the South Caucasian countries, Armenia, Azerbaijan, and Georgia

2021 ◽  
pp. 32
Author(s):  
Tatia Kuljanishvili ◽  
Levan Mumladze ◽  
Bella Japoshvili ◽  
Namig Mustafayev ◽  
Shaig Ibrahimov ◽  
...  
Keyword(s):  
Black Sea ◽  
Fish Species ◽  
Caspian Sea ◽  
Native Species ◽  
Biological Diversity ◽  
Native Fish ◽  
The Black Sea ◽  
The South ◽  
In The Wild ◽  
Native Fishes

The South Caucasus (SC) region is recognized for its high biological diversity and various endemic animal taxa. The area has experienced many fish introductions over the years, but the overall information about non-native fishes in the three SC countries, Armenia, Azerbaijan, and Georgia did not exist. Although these three countries belong to the Kura River drainage, Caspian Sea basin (only the western half of Georgia drains into the Black Sea), the legislative framework for each country regarding introduction of non-native fish species and their treatment is different and poorly developed. The goal of the present study was to make an initial inventory of non-native fish species in the three SC countries, and summarize the existing knowledge as a basis for future risk assessment models and formulation of regional management policies. Here, we present a unified list of 27 non-native species recorded in the wild in Armenia, Azerbaijan, and Georgia. Among these 27 species, eight were translocated from the Black Sea basin to the Caspian Sea basin. Out of these 27 non-native fishes, 15 species have become established (three of them being considered invasive) and six fish species could not survive in the wild.

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