scholarly journals The diversity of annelids in subterranean waters: a case study from Poland

2020 ◽  
pp. 16
Author(s):  
Elzbieta Dumnicka ◽  
Joanna Galas ◽  
Mariola Krodkiewska ◽  
Agnieszka Pociecha
Keyword(s):  
Habitat Preferences ◽  
Underground Water ◽  
Running Waters ◽  
Underground Waters ◽  
Aquatic Fauna ◽  
Comprehensive Picture ◽  
Cave Waters ◽  
Ordination Diagram ◽  
Subterranean Waters

Not all invertebrate groups commonly occur in subterranean waters but annelids live in surface and underground habitats. The annelid species' richness in various underground waters (wells and interstitial and cave waters) and surface streams of Poland was compared, and the habitat preferences for the most frequent species were determined. Until now, 111 annelid taxa (mainly oligochaetes) had been identified in underground waters in Poland, with higher numbers (71) in the interstitial habitat than in stream bottoms (62). The number of species identified in the caves and wells was distinctly lower (54 and 29, respectively). The Correspondence Analysis did not separate the samples from various underground water types into distinct groups, and the distribution of well fauna was especially scattered (in the ordination diagram) because abiotic parameters differ strongly in studied wells. Only three stygobiontic species (Cernosvitoviella parviseta, Enchytraeus dominicae and Trichodrilus moravicus) were related to some caves. The analysis of the available data indicate that to obtain a comprehensive picture of the aquatic fauna in a given country all types of subterranean aquatic habitats should be sampled and taken into account. Moreover, to ascertain the composition of benthic invertebrates in running waters, investigation of the interstitial habitat should also be performed.

Construction of risk in road safety advertising: a multimodal analysis of Vietnamese child helmet awareness advertisements

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Hoang Van Nguyen
Keyword(s):  
Road Safety ◽  
Expert Knowledge ◽  
Multimodal Approach ◽  
Traditional Values ◽  
Multimodal Analysis ◽  
Multimodal Discourse Analysis ◽  
Multimodal Discourse ◽  
Comprehensive Picture ◽  
Media And Communication

AbstractThe discourses of risk serve to organise the ways in which we understand and respond to potential harms and threats, which have become a major concern in our daily life. However, the discourses of risk have not been extensively investigated using linguistic text-based methods on the multimodal level, nor deeply examined beyond Western contexts. Grounded in the literature of risk and multimodal discourse, the aim of the study is to demonstrate Multimodal Discourse Analysis from a Systemic Functional Linguistics perspective as a potential methodology to investigate how risk discourses are constructed in and through semiotic resources in a non-Western setting. Through a case study of child helmet awareness advertisements in Vietnam, the multimodal analysis reveals a comprehensive picture of risk discourses constructed across various semiotic modes. In this analysis, the discourses of risk are constructed through a negotiation of expert knowledge and traditional values to encourage the audience to take actions and provide helmets for their children. Findings of the study demonstrate the use of Systemic Functional multimodal approach to media and communication to provide evidence for risk discourses in the Vietnamese setting, which are at odds with the current literature and can potentially be extended to other contexts.

Design of experimental food patches to measure foraging intensity for octopus: a case study with the giant Pacific octopus Enteroctopus dofleini

2020 ◽  
Author(s):  
Stephanie Chancellor ◽  
David Scheel ◽  
Joel S Brown
Keyword(s):  
Predation Risk ◽  
Foraging Behaviour ◽  
Habitat Preferences ◽  
High Tide ◽  
Intertidal Habitat ◽  
Camera System ◽  
Subtidal Habitat ◽  
Enteroctopus Dofleini ◽  
Nontarget Species

ABSTRACT In a study of the foraging behaviour of the giant Pacific octopus Enteroctopus dofleini, we designed two types of experimental food patches to measure habitat preferences and perceptions of predation risk. The first patch successfully measured giving-up densities (GUDs), confirmed by octopus prey presence and higher foraging at sites with historically greater octopus presence. However, nontarget foragers also foraged on these experimental food patches. Our second floating patch design successfully excluded nontarget species from subtidal patches, and from intertidal patches at high tide, but allowed for foraging by E. dofleini. The second design successfully measured GUDs and suggested that octopus preferred foraging in a subtidal habitat compared to an intertidal habitat. We ascribe the higher GUD in the intertidal habitat to its higher predation risk relative to the subtidal habitat. The second patch design seems well suited for E. dofleini and, in conjunction with a camera system, could be used to provide behavioural indicators of the octopus's abundance, perceptions of habitat quality and predation risk.

Environmental Study of Cave Waters: A Case Study in Las Herrerías Cave (Llanes, Spain)

2014 ◽  
pp. 513-521
Author(s):  
M. Meléndez ◽  
M. Jiménez-Sánchez ◽  
I. Vadillo ◽  
H. Stoll ◽  
M. J. Domínguez-Cuesta ◽  
...  
Keyword(s):  
Environmental Study ◽  
Cave Waters

An Emerging Online Public

2019 ◽  
pp. 129-170
Author(s):  
Ya-Wen Lei
Keyword(s):  
Public Opinion ◽  
Public Sphere ◽  
Political Behavior ◽  
Everyday Practices ◽  
Media Institutions ◽  
Comprehensive Picture ◽  
Demographic Background ◽  
Depth Interviews ◽  
Party State

This chapter focuses on the emergence of an online public in China and delves into its relationship with the party-state and various intermediary actors, as well as its interaction with legal and media institutions. It argues that netizens' everyday practices and participation in public opinion incidents facilitated the rise of contentious culture and China's contentious public sphere. Because the late 2000s were critical to the rise of an online public and the contentious public sphere, the analysis focuses mostly on this period. To depict a more comprehensive picture of Chinese netizens, the chapter first draws on statistical data to describe their demographic background, social networks, political attitudes, and political behavior. Next, it describes their everyday practices and participation in public opinion incidents. It then examines the case study of a public opinion incident involving food safety, and shows how netizens interacted with the Chinese party-state and various intermediary actors to make what happened a “public opinion incident.” Finally, the chapter draws on in-depth interviews with ordinary citizens to understand how netizens' everyday practices and participation in public opinion incidents contribute to politicization.

Improved design of the head of a blowing production well

2021 ◽  
pp. 11-14
Author(s):  
Б.А. Опрышко ◽  
В.А. Швецов ◽  
А.Э. Шагинян ◽  
О.А. Белавина
Keyword(s):  
Continuous Monitoring ◽  
Operating Mode ◽  
Underground Water ◽  
Control Parameters ◽  
Production Well ◽  
Automated Control ◽  
Underground Waters ◽  
Accuracy Of Measurements ◽  
Improved Design ◽  
E Mail

Камчатский государственный технический университет 683003, Россия, г. Петропавловск-Камчатский, Ключевская ул., 35, тел.: +7 (4152) 30-08-77, e-mail: [email protected] Предложена усовершенствованная конструкция оголовка для эксплуатационной самоизливающейся скважины водозаборов питьевых подземных вод. Оголовок относится к области технических средств, предназначенных для непрерывного контроля режима работы и гидрогеологического мониторинга водозаборов. Оголовок используется на скважинах, расположенных на неохраняемых территориях. Установка оголовка позволяет автоматизировать контроль работы скважин и мониторинг подземных питьевых вод, при этом повышается точность измерений контрольных параметров подземных вод. An improved design of the head for a blowing production well for drinking underground water intakes is proposed. A well head is assigned to the technical means for continuous monitoring of the operating mode and hydrogeological monitoring of water intakes. The head is used in wells located in unguarded areas. The installation of the head provides for the automated control of wells and monitoring of underground drinking water, while increasing the accuracy of measurements of the control parameters of underground waters.

A New Metal Ore Karst Deposition Form - Case Study for Dolomite Residual Deposit in Dongxiang Copper Mine, Jiangxi Province, China

2013 ◽  
Vol 838-841 ◽  
pp. 1830-1835
Author(s):  
Zhi Wei Yan ◽  
Hui Li Liu ◽  
Zhi Gan Zhang ◽  
Shui Xin Li
Keyword(s):  
Water System ◽  
Wall Rock ◽  
Underground Water ◽  
Sulfide Mineral ◽  
Mineral Deposit ◽  
Jiangxi Province ◽  
Copper Ore ◽  
Copper Mine ◽  
Regional Hydrogeology

The Kcd (Karst colluvium and deluvium) deposit of Dongxiang copper mine had long been considered as a kind of ancient diluvium, alluvium and proluvium in Cretaceous Karst depression. Based on lithology and morphology analysis of Kcd, and further research for regional hydrogeology and hydrogeochemistry, it was considered as a new special Karst deposition form of metal ore in this project. In the oxidation zone of sulfide mineral deposit, Kcd was a deposition mixture of dolomite powder (sand) and eluvium of dolomite wall rock, which were generated by the action of sulfuric acid water on wall rock, and the collapse deposition from the overlying K2n red beds. This kind of deposition was still generating and developing today. The monoclinal structure, primary sulfide mineral deposit occurred in clastic rock and claystone, dolomite and siliceous dolomite with 160m deep in underground water system, all that provided the development conditions of metal ore Karst deposition. This viewpoint could not only guide the copper ore exploration of Dongxiang type, but also provide a good case for Karst development in sulfide mineral areas.

Are polymorphic species of Uropodina (Acari: Mesostigmata) more successful evolutionarily?—A case study of closely related species from the genus Oodinychus Berlese, 1917 based on DNA sequences

2019 ◽  
Vol 24 (5) ◽  
pp. 866
Author(s):  
Jerzy Błoszyk ◽  
Katarzyna Buczkowska ◽  
Anna Maria Bobowicz ◽  
Alina Bączkiewicz ◽  
Zbigniew Adamski ◽  
...  
Keyword(s):  
Dna Sequences ◽  
Related Species ◽  
Habitat Preferences ◽  
Abundant Species ◽  
Systematic Position ◽  
Genetic Differences ◽  
Similar Species ◽  
Closely Related Species ◽  
Wide Range

The study presented in this research paper is the first taxonomic investigation focusing on Uropodina (Acari: Mesostigmata) mites with a brief discussion of the genetic differences of two very closely related species from the genus Oodinychus Berlese, 1917, i.e. O. ovalis (C.L. Koch, 1839) and O. karawaiewi (Berlese, 1903). These two morphologically similar species are quite common and they have a wide range of occurrence in Europe. They also live in almost the same types of habitat. However, O. ovalis usually exhibits higher abundance and frequency of occurrence. The major aim of the study was to carry out a comparative analysis of the systematic position, morphological and biological differences, as well as habitat preferences and distribution of O. ovalis and O. karawaiewi. The next aim was to ascertain whether the differences in number and frequency of these species may stem from the genetic differences at the molecular level (16S rDNA and COI). The study shows that O. ovalis, which is a more abundant species than O. karawaiewi, turned out to be genetically more polymorphic.

scholarly journals The importance of non-forest tree stand features for protection of the Syrian Woodpecker Dendrocopos syriacus in agricultural landscape: a case study from South-Eastern Poland

2020 ◽  
Vol 94 (5) ◽  
pp. 1825-1835
Author(s):  
Jerzy Michalczuk
Keyword(s):  
Species Diversity ◽  
Agricultural Landscape ◽  
Habitat Preferences ◽  
Fruit Trees ◽  
Forest Tree ◽  
Health Condition ◽  
Agricultural Landscapes ◽  
South Eastern ◽  
Dendrocopos Syriacus

Abstract Non-forest tree stands are important habitats for many species of birds in the agricultural landscape. They are also the main habitat of the Syrian Woodpecker Dendrocopos syriacus, whose numbers have been decreasing in recent years in some parts of Europe. Recognition of the habitat requirements of this species may help better planning of its protection in the context of the treed agricultural landscapes. During this study, the habitat preferences of the Syrian Woodpecker were determined in the agricultural landscape of South-Eastern Poland. A set of 12 habitat parameters of tree stands located in the breeding territories of the Syrian Woodpecker (n = 122) and in randomly chosen control areas (n = 122) located outside the range of the breeding territories of this species were characterized. The number and species diversity of trees was significantly higher in stands located in Syrian Woodpecker territories than in the random control areas. Stands occupied by breeding pairs also had trees of worse health condition and a larger proportion of fruit trees. The model best explaining the probability of the occurrence of the species indicates that the Syrian Woodpecker requires mainly the presence of tree stands with a greater species diversity of trees, as well as tree stands in worse health condition. When planning the protection of this species’ habitats in the agricultural landscape, the characteristics of non-forest tree stands noted above should be taken into account.

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