scholarly journals Co-haplotyping symbiont and host to unravel invasion pathways of the exotic pest Halyomorpha halys in Italy

2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Isabel Martinez-Sañudo ◽  
M. Alejandra Perotti ◽  
Davide Scaccini ◽  
Alberto Pozzebon ◽  
Laura Marri ◽  
...  
Keyword(s):  
Mitochondrial Gene ◽  
Haplotype Diversity ◽  
Halyomorpha Halys ◽  
Stink Bug ◽  
Invasion Pathways ◽  
Association Pattern ◽  
The North ◽  
North Eastern ◽  
Important Pest

Abstract The brown marmorated stink bug Halyomorpha halys (Stål) is a globally invasive species that harbours the primary bacterial symbiont ‘Candidatus Pantoea carbekii’. In this work, P. carbekii was used as another genetic marker to investigate the biodiversity and biogeographical patterns of this important pest, in native and newly invaded areas, especially in Italy. The correlation between the genetic structure of the symbiont and that of its host was studied through the analyses of one bacterial and one host marker, the putative pseudogene ΔybgF and the mitochondrial gene COI, respectively. As a result, five new P. carbekii haplotypes were identified, and an association pattern between host-symbiont haplotypes was observed. Host species showed higher haplotype diversity than symbiont, which can be expected in a long term host-symbiont association. Populations from the north-eastern Italy showed the highest values of genetic diversity for both markers, highlighting that this particular Italian area could be the result of multiple ongoing introductions. Moreover, some of the symbiont-host haplotypes observed were shared only by populations from north-eastern Italy and native areas, especially Japan, suggesting further introductions from this native country to Italy. Overall, our findings improve the understanding of the potential origin of multiple accidental introductions of H. halys in Italy.

scholarly journals Population genetics of the brown marmorated stink bug Halyomorpha halys in the early phase of invasion in South Tyrol (Northern Italy)

2020 ◽  
pp. 1-8
Author(s):  
Hannes Schuler ◽  
David Elsler ◽  
Stefanie Fischnaller
Keyword(s):  
Haplotype Diversity ◽  
Northern Italy ◽  
Small Scale ◽  
Halyomorpha Halys ◽  
Brown Marmorated Stink Bug ◽  
Stink Bug ◽  
Invasion Pathways ◽  
Long Distance ◽  
South Tyrol ◽  
Invasion Pathway

Abstract The brown marmorated stink bug Halyomorpha halys is one of the most harmful invasive species in the world. Native to East Asia, this insect was introduced into North America in the 1990s and into Europe in the 2000s where it subsequently established and spread across the continent. Previous population genetic studies determined the invasion pathways at continental and national levels. However, information on the dynamics on a small-scale is currently scarce. Here we study the genetic diversity and population dynamics of H. halys in South Tyrol, a region in Northern Italy, since its arrival to its widespread establishment over a period of four years. By haplotyping 162 individuals from ten populations (including six previously published individuals) we found a high haplotype diversity in most populations with an increasing diversity across the different years. Most haplotypes were previously found in other regions of Northern Italy, providing evidence for migration from neighboring regions. However, the presence of four previously undescribed haplotypes as well as a haplotype previously found exclusively in Greece highlights additional long-distance dispersal across the continent. Phylogenetic analysis of the haplotypes found in South Tyrol showed that the majority of haplotypes clustered with haplotypes predominantly found in Japan. This suggests a potential recent introduction of H. halys individuals from Japan into Europe, and thus an additional invasion pathway that was previously unidentified.

scholarly journals Geodetic work at the archaeological site Tell el-Retaba

2018 ◽  
Vol 17 (2) ◽  
pp. 65-80
Author(s):  
Eva Stopková
Keyword(s):  
Spatial Data ◽  
Statistical Modelling ◽  
Archaeological Site ◽  
The North ◽  
Digital Elevation ◽  
North Eastern ◽  
Elevation Model ◽  
Modern Technologies

The paper summarizes the geodetic contribution for the Slovak team within the joint Polish-Slovak archaeological mission at Tell el-Retaba in Egypt. Surveying work at archaeological excavations is usually influenced by somewhat specific subject of study and extreme conditions, especially at the missions in the developing countries. The case study describes spatial data development according to the archaeological conventions in order to document spatial relationships between the objects in excavated trenches. The long-term sustainability of surveying work at the site has been ensured by detailed metadata recording. Except the trench mapping, Digital Elevation Model has been calculated for the study area and for the north-eastern part of the site, with promising preliminary results for further detection and modelling of archaeological structures. In general, topographic mapping together with modern technologies like Photogrammetry, Satellite Imagery, and Remote Sensing provide valuable data sources for spatial and statistical modelling of the sites; and the results offer a different perspective for the archaeological research.

scholarly journals Assemblage of the Egg Parasitoids of the Invasive Stink Bug Halyomorpha halys: Insights on Plant Host Associations

Insects ◽  
2020 ◽  
Vol 11 (9) ◽  
pp. 588
Author(s):  
Livia Zapponi ◽  
Marie Claude Bon ◽  
Jalal Melhem Fouani ◽  
Gianfranco Anfora ◽  
Silvia Schmidt ◽  
...  
Keyword(s):  
Biological Control ◽  
Mitochondrial Gene ◽  
Strong Support ◽  
Egg Parasitoids ◽  
Economic Losses ◽  
Halyomorpha Halys ◽  
Stink Bug ◽  
Plant Host ◽  
Egg Masses ◽  
Host Associations

Halyomorpha halys (Stål) (Hemiptera: Pentatomidae) is an invasive alien species and a key agricultural pest. Its native parasitoids (Trissolcus japonicus Ashmead and Tr. mitsukurii Ashmead) have been registered in several countries where H. halys brought dramatic economic losses and where biological control is considered to be the most effective long-term solution. By searching for stink bug egg masses and exposing sentinel egg masses, we monitored the distribution of native and exotic egg parasitoids in Trentino-Alto Adige (Italy), an area where both the host and parasitoids are in expansion. We recorded ten pentatomids, seven parasitoid species, with the first report of Tr. japonicus in this area and a hyperparasitoid. In the assemblage, Anastatus bifasciatus (Geoffroy) and Tr. mitsukurii were the dominant parasitoids, with a different distribution in terms of context and host plants. Sycamore was the host plant where the highest number of naturally laid parasitized egg masses (26%) were recorded. Trissolcus mitsukurii showed the highest parasitism rate, and was often found in apple orchards. The emergence of exotic parasitoids showed a temporal delay compared to native ones. Sequence analysis of 823 bp of the CO1 mitochondrial gene revealed that the recovered Tr. japonicus and Tr. mitsukurii harbored one single haplotype each. These haplotypes were previously found in 2018 in Northern Italy. While sentinel egg masses proved to be very effective in tracking the arrival of exotic Trissolcus species, the collection of stink bug egg masses provided fundamental data on the plant host species. The results lend strong support to the adaptation of exotic Trissolcus species to the environmental conditions of the range of introduction, providing new information on plant host-associations, fundamental for the development of biological control programs.

A fragile seed of social and solidarity economy in post-disaster affected areas of Tohoku, Japan

2020 ◽  
Vol 31 (2) ◽  
pp. 97-114
Author(s):  
Fumihiko Saito
Keyword(s):  
Nuclear Power ◽  
Structural Changes ◽  
Positive Sign ◽  
Solidarity Economy ◽  
Root Cause ◽  
The North ◽  
North Eastern ◽  
Market Capitalism ◽  
Post Disaster

The world today faces a series of crises, and many observers have started to realize that the root cause of these crises is market capitalism. In such a context, the triple disasters of earthquake, tsunami, and nuclear power plant accident hit the north-eastern part of Japan on 11 March 2011. “3.11” has accelerated the long-term structural changes of rural Japan such as depopulation. Nine years since the disasters, one positive sign is the emergence of networks between producers and consumers who are now reciprocally connected. This article pays particular attention to a new monthly delivery package of magazine and food called, Tohoku Food Communication (TFC), first released in July 2013. The experiences of TFC can be interpreted as a fragile yet significant seed to promote social and solidarity economy (SSE). This paper critically examines both possibilities and limitations of SSE, which may contribute to making our society more sustainable than now. Keywords: “3.11”; natural disaster; Tohoku Food Communication (TFC); social and solidarity economy (SSE); sustainability.

Nigerian north-east relief gains could be reversed

2017 ◽  
Keyword(s):  
Niger Delta ◽  
Regional Security ◽  
Security Sector ◽  
Content Type ◽  
Political Situation ◽  
North East ◽  
The North ◽  
North Eastern ◽  
The Military

Significance Delivery of relief to 8.5 million people in north-eastern Nigeria is complicated by persistent insecurity due to the Boko Haram insurgency, the dependency of the aid community on military cooperation for access, alleged corruption and mismanagement by government agents and contractors, an uncertain domestic political situation and ambiguity about mid-term funding from international sources. These challenges have led to an enduring humanitarian disaster and the possibility of reversals on the regional security front. Impacts Political uncertainty due to President Muhammadu Buhari’s poor health will hamper national efforts on the humanitarian front. An unimproved humanitarian situation will complicate the military’s counter-insurgency campaign, and harm long-term security efforts. Ongoing corruption revelations, particularly within the military, could undermine security sector and federal executive relations. Renewed Niger Delta militancy and pro-Biafra separatism could distract the federal government's attention from the north-east.

Creating the Deserved Protection: Reflections on Civilian Joint Task Force Counter-insurgency Operations in the North-Eastern Region of Nigeria

2018 ◽  
Vol 4 (1) ◽  
Author(s):  
'Seun Bamidele
Keyword(s):  
Task Force ◽  
Local Population ◽  
Eastern Region ◽  
The North ◽  
Post Conflict ◽  
Joint Task ◽  
North Eastern ◽  
Joint Task Force

This article considers the role of the Civilian Joint Task Force (popularly called CJTF), a group of armed local population participating in the joint battle against Boko Haram, has become a platform for recruitment into the Nigerian security institutions in north-eastern Nigeria. CJTF members have played many roles, from mostly discrete surveillance networks in the north-eastern region of Nigeria to military combat auxiliaries or semi-autonomous fighting forces in the country. For the region’s overstretched and under pressure militaries, they have somewhat filled the security gap and provided local knowledge. CJTF can be a powerful counter-insurgency tool, but there is a compelling need to confront the immediate concerns it raises, notably in terms of impunity, and to begin planning for its long-term post-conflict transformation. The article adopts Galula’s theory of counter-insurgency. It reveals several lessons in how a community-based security structure can be applied to a conventional security engagement.

Coastal Sea Level Change from in the North Eastern Atlantic

2020 ◽  
Author(s):  
Luciana Fenoglio-Marc ◽  
Bernd Uebbing ◽  
Jürgen Kusche ◽  
Salvatore Dinardo
Keyword(s):  
Time Series ◽  
Sea Level ◽  
Sea Level Change ◽  
Altimeter Data ◽  
Level Change ◽  
The North ◽  
North Eastern ◽  
Coastal Sea

<p>A significant part of the World population lives in the coastal zone, which is affected by coastal sea level rise and extreme events. Our hypothesis is that the most accurate sea level height measurements are derived from the Synthetic Aperture Altimetry (SAR) mode. This study analyses the output of dedicated processing and assesses their impacts on the sea level change of the North-Eastern Atlantic. </p><p>It will be shown that SAR altimetry reduces the minimum usable distance from five to three kilometres when the dedicated coastal retrackers SAMOSA+ and SAMOSA++ are applied to data processed in SAR mode. A similar performance is achieved with altimeter data processed in pseudo low resolution mode (PLRM) when the Spatio-Temporal Altimeter sub-waveform Retracker (STAR) is used. Instead the Adaptive Leading Edge Sub-waveform retracker (TALES) applied to PLRM is less performant. SAR processed altimetry can recover the sea level heights with 4 cm accuracy up to 3-4 km distance to coast. Thanks to the low noise of SAR mode data, the instantaneous SAR and in-situ data have the highest agreement, with the smallest standard deviation of differences and the highest correlation. A co-location of the altimeter data near the tide gauge is the best choice for merging in-situ and altimeter data. The r.m.s. (root mean squared) differences between altimetry and in-situ heights remain large in estuaries and in coastal zone with high tidal regimes, which are still challenging regions. The geophysical parameters derived from CryoSat-2 and Sentinel-3A measurements have similar accuracy, but the different repeat cycle of the two missions locally affects the constructed time-series.</p><p>The impact of these new SAR observations in climate change studies is assessed by evaluating regional and local time series of sea level. At distances to coast smaller than 10 Kilometers the sea level change derived from SAR and LRM data is in good agreement. The long-term sea level variability derived from monthly time-series of LRM altimetry and of land motion-corrected tide gauges agrees within 1 mm/yr for half of in-situ German stations. The long-term sea level variability derived from SAR data show a similar behaviour with increasing length of the time series.</p><p> </p>

scholarly journals Brown Marmorated Stink Bug (Halyomorpha halys Stål.) Attack Induces a Metabolic Response in Strawberry (Fragaria × ananassa Duch.) Fruit

Horticulturae ◽  
2021 ◽  
Vol 7 (12) ◽  
pp. 561
Author(s):  
Nika Cvelbar Weber ◽  
Jaka Razinger ◽  
Jerneja Jakopič ◽  
Valentina Schmitzer ◽  
Metka Hudina ◽  
...  
Keyword(s):  
Metabolic Response ◽  
Shikimic Acid ◽  
Sugar Content ◽  
Control Treatment ◽  
Halyomorpha Halys ◽  
Brown Marmorated Stink Bug ◽  
Stink Bug ◽  
Fragaria Ananassa ◽  
Significant Difference ◽  
Important Pest

The polyphagous brown marmorated stink bug (Halyomorpha halys Stål.) is an important pest in many countries. Recently it was noticed that it can feed on and cause damage to strawberries (Fragaria × ananassa Duch.). The metabolic response of strawberries to brown marmorated stink bug attacks was studied. Brown marmorated stink bugs attacked strawberry fruit which had 18% lower total sugar content compared to that of the control treatment. However, organic acid content had no significant difference among the three treatments, with the exception of shikimic acid, which had the highest content in the attacked fruit. Thirty-one phenolic compounds were identified. Results showed a strong effect on secondary metabolites due to H. halys attacks. Halyomorpha halys treatment had 27% higher total analyzed phenolic content compared to the indirect Halyomorpha halys treatment. The brown marmorated stink bug significantly increased total ellagic acid derivatives (33.1% to 37% higher), hydroxycinnamic acids (22.3% higher) and anthocyanins’ (39% higher) contents. Fruit attacked by Halyomorpha halys also had higher catechin and epicatechin content than that of the control treatments. This pest had a significant influence on the plant’s secondary metabolism, and this improved our understanding of how a strawberry plant reacts to the attacks of this very important pest. H. halys-infested fruit are not suitable for commercial production, due to the production of off-flavors.

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