scholarly journals The Distribution Pattern of Sediment Archaea Community of the Poyang Lake, the Largest Freshwater Lake in China

Archaea ◽  
2016 ◽  
Vol 2016 ◽  
pp. 1-12 ◽  
Author(s):  
Yantian Ma ◽  
Fangpeng Liu ◽  
Zhaoyu Kong ◽  
Jianhua Yin ◽  
Wenbo Kou ◽  
...  

Archaea plays an important role in the global geobiochemical circulation of various environments. However, much less is known about the ecological role of archaea in freshwater lake sediments. Thus, investigating the structure and diversity of archaea community is vital to understand the metabolic processes in freshwater lake ecosystems. In this study, sediment physicochemical properties were combined with the results from 16S rRNA clone library-sequencing to examine the sediment archaea diversity and the environmental factors driving the sediment archaea community structures. Seven sites were chosen from Poyang Lake, including two sites from the main lake body and five sites from the inflow river estuaries. Our results revealed high diverse archaea community in the sediment of Poyang Lake, including Bathyarchaeota (45.5%), Euryarchaeota (43.1%), Woesearchaeota (3.6%), Pacearchaeota (1.7%), Thaumarchaeota (1.4%), suspended Lokiarchaeota (0.7%), Aigarchaeota (0.2%), and Unclassified Archaea (3.8%). The archaea community compositions differed among sites, and sediment property had considerable influence on archaea community structures and distribution, especially total organic carbon (TOC) and metal lead (Pb) (p<0.05). This study provides primary profile of sediment archaea distribution in freshwater lakes and helps to deepen our understanding of lake sediment microbes.

2020 ◽  
Vol 1 ◽  
pp. 53-75
Author(s):  
Dimitrios Zervas ◽  
Ioannis Tsiripidis ◽  
Erwin Bergmeier ◽  
Vasiliki Tsiaoussi

Aims: This study aims to contribute to the knowledge of European freshwater lake ecosystems with updated and new information on aquatic plant communities, by conducting national-scale phytosociological research of freshwater lake vegetation in Greece. Moreover, it investigates the relationship between aquatic plant communities and lake environmental parameters, including eutrophication levels and hydro-morphological conditions. Study area: Lakes in Greece, SE Europe. Methods: 5,690 phytosociological relevés of aquatic vegetation were sampled in 18 freshwater lake ecosystems during 2013–2016. The relevés were subjected to hierarchical cluster and indicator species analyses in order to identify associations and communities of aquatic vegetation, as well as to describe their syntaxonomy. Multiple regression analysis was applied to investigate the relationship between vegetation syntaxa and environmental parameters of lakes, i.e. physico-chemical parameters and water level fluctuation. Results: Ninety-nine plant taxa belonging to 30 different families were recorded. Forty-six vegetation types were identified and described by their ecological characteristics, diagnostic taxa and syntaxonomical status. Thirteen vegetation types, the largest number belonging to the vegetation class Charetea, are considered to be new records for Greece. The distribution of the vegetation types recorded in the 18 freshwater lakes was found to depend on environmental parameters and levels of eutrophication. Conclusions: An updated aquatic vegetation inventory was produced for Greek lakes, and primary results showed that the presence/absence of aquatic plant communities and the community composition in freshwater lakes can be utilized to assess the pressure of eutrophication on lake ecosystems. Taxonomic reference: Euro+Med (2006–). Abbreviations: MNT = Mean number of taxa; WFD = Water Framework Directive.


Author(s):  
R C Segundo ◽  
P R English ◽  
G Burgess ◽  
S A Edwards ◽  
O MacPherson ◽  
...  

The role of stockmanship in relation to the wellbeing of farm animals has been emphasised in the UK Codes of Recommendations for the Welfare of Farm Livestock (MAFF, 1983). Moreover, previous research work has demonstrated important effects of good and bad stockmanship not only on welfare but also on growth, lactational and reproductive performance of pigs and other farm livestock (Hemsworth et al, 1987). There is a need, therefore, to establish the factors which motivate and demotivate stockpeople since the degree of job satisfaction is likely to have a considerable influence on the attitude and performance of stockpeople and on their empathy with the animals in their care. With this objective in mind, a questionnaire was designed to investigate the aspects which could have an influence on the job satisfaction of the stockpeople involved in pig production.


2021 ◽  
Vol 9 (3) ◽  
pp. 445
Author(s):  
Vevi Sunarti ◽  
Jamaris Jamna ◽  
Sufyarma Marsidin

Children's education cannot be separated from the large contribution of parents, who realize it or not will have a considerable influence on the success of an education. Therefore, in any situation, the role of parents cannot be ignored. One of the things we can observe is the need for parental cooperation in the implementation of existing education in an educational institution, we call it an early childhood education institution. Early childhood education cannot be separated from the cooperation of parents, the low cooperation of parents with early childhood education institutions will affect the success of the program itself. In this study the researchers tried to analyze the things that caused the low work of parents in early childhood education institutions, questionnaires were distributed to 21 who had children who were in early childhood education institutions and distributed randomly. With the results of good job research in terms of orientation to tasks that are considered quite good, (2) Orientation to the process which is considered quite good (3) Orientation to the assessment is quite low. The conclusions we can draw from this research are the need for an approach given to parents, so that parents want to be involved and cooperate in early childhood education institutions.


2018 ◽  
Vol 19 (8) ◽  
pp. 2384-2396
Author(s):  
Xuefei Mei ◽  
Juan Du ◽  
Zhijun Dai ◽  
Jinzhou Du ◽  
Jinjuan Gao ◽  
...  

Author(s):  
Brian Walker

This article looks at the role of religion in politics. Northern Ireland provides not only a good case study for this issue but also an opportunity to see how the subject has been approached in academic literature over the last forty years. It is argued here that religion can be a modern day, independent factor of considerable influence in politics. This has been important not only in Northern Ireland but also elsewhere in Western Europe in the twentieth century. This reality has been largely ignored until recently, partly because the situation in Northern Ireland has often been studied in a limited comparative context, and partly because of restrictive intellectual assumptions about the role of religion in politics.


Author(s):  
John Anthony Lawler ◽  
Ghazala Mir

This chapter presents findings from a research study examining the relationship between faith communities, social cohesion activity and the leadership role of women. The study examined women's exercise of leadership or influence in small intercultural, interfaith projects, which they had developed to improve social cohesion in their local communities. Data were gathered using qualitative interviews and participatory research methods, predominantly with women from a range of religious backgrounds. Findings indicated that women involved in interfaith activity often occupied roles with relatively little power within their communities. Despite this they were at times able to affect considerable influence within their own contexts. Contrary to expectations from existing evidence, changes resulting from the interfaith activities under consideration occurred despite rather than because of formal leadership. The concept and practice of leadership in interfaith activity and how this might relate to different conceptualizations of social cohesion and leadership within faith communities are discussed.


2020 ◽  
pp. 88-124
Author(s):  
Arzoo Osanloo

This chapter studies the operations of the Iranian criminal law and analyzes how the procedural administration of the law animates the shariʻa. Iranian criminal laws provide many avenues for victims to forgo retributive sanctioning. But preserving the right of retribution serves several purposes: maintaining the sovereign's monopoly on legitimate violence, giving victims a sense of power, and halting the cycle of violence. The way Iran achieves this comprises an interesting balancing act between maintaining the monopoly over legitimate violence and granting individual victims the right of retribution, which its leaders believe, through their interpretation of the shariʻa, cannot be appropriated by the sovereign. Since the law categorizes intentional murder as qisas and leaves judges with no discretion in sentencing, the judges may use their considerable influence to pressure the family to forgo retribution. The chapter then considers the role of judges and examines how the laws (substantive and procedural) shape their reasoning and discretion in both sentencing and encouraging forbearance.


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