<abstract xmlns="http://www.w3.org/1999/xhtml">

The diversity of water body types in the Danube Delta offers appropriate ecological niches for the colonisation of frequently large stands of the waterchestnut (<italic>Trapa natans</italic>). Their phytocoenoses were observed in slowly running and standing waters from clear, sediment-poor, to turbid and sediment-rich waters on muddy ground.
<italic>Trapa natans</italic> occurs in standing, and slowly running, waters and is well adapted to fluctuation of water level changes. The water dynamics is responsible for the composition of accompanying species of the phytocoenoses. The particular zonation, demonstrated by a cross section shows the adaption to the structure and the water flow of certain water bodies. Comparing older and newer research data, a decline of the populations of waterchestnuts became visible.
</abstract>

Ecological conditions of the Waterchestnut (<italic>Trapa natans</italic> L.) in the Danube Delta (Romania)

<abstract xmlns="http://www.w3.org/1999/xhtml">

This paper presents data compilation for indicator species of organic pollution and trophic state of continental waters. Information was collected from research papers, monographs, electronic resources, and our research. Altogether 316 species of higher plants, plants, mosses, charophytes, protozoan, and bacteria from 11 taxonomical phyla are represented with ecological preferences for saprobity indicators with saprobity index (S) and indicators of trophic state. This comprehensive data can be used for the purpose of aquatic ecosystem assessment and monitoring of water quality based on bioindication methods.
</abstract>

Plants, Mosses, Charophytes, Protozoan, and Bacteria Water Quality Indicators for Assessment of Organic Pollution and Trophic Status of Continental Water Bodies

<abstract xmlns="http://www.w3.org/1999/xhtml">

Ten bacterial species were isolated and monthly variations in their count were recorded from three edible tuna fishes. Phytochemical analysis and antibacterial activity of hexane, chloroform, methanol, and distilled water extracts of twelve common spices, against the isolated bacteria were evaluated. The study indicates that these pathogenic bacteria in all three tuna fish species cause various human health problems upon consumption.
</abstract>

A Study on Phyto-Chemical Analysis and Antibacterial Activity of Spices on Pathogenic Bacteria Isolated from Commercially Important Edible Marine Fishes, <italic>Euthynnus Affinis</italic> (Cantor), <italic>Katsuwonus Pelamis</italic> L. and <italic>Auxis Thazard</italic> (Lacepede) (Family Scombridae)

<abstract xmlns="http://www.w3.org/1999/xhtml">

The Ilisu Dam is a large hydroelectric power plant that started to collect water in 2019 on the Tigris River in Turkey. This study was done during the period 2010 to 2014 to determine fish fauna of the Tigris River and its tributaries related to the potential reservoir area of the Ilisu Dam before its foundation. 35 fish species belonging to 10 families have been identified in the main river and its tributaries to be covered by the dam reservoir. One of these species, <italic>Glyptothorax steindachneri</italic> was recorded for the first time from the Turkish part of the Tigris River. 22 species were found widely distributed. At least 16 species were found to be endemic to the Tigris and Euphrates basins. Three species were already recommended with some level of international protection as per IUCN Red List. <italic>Cobitis kellei</italic> and <italic>Paraschistura chrysicristinae</italic> species, whose type localities were reported as upper Tigris, were not recorded.
</abstract>

Fish Fauna of Ilisu Area on the Tigris River, Before Impoundment of the Ilisu Dam (Turkey)

<abstract xmlns="http://www.w3.org/1999/xhtml">

26 fish species were affected by the Coştei historical diversion hydrotechnical system build in 1758. In order to mitigate the negative effects produced by this hydrotechnical work on the fish, a migration system, of nature-like meandering by pass type was proposed. The dimensions of this channel and the slope of about 2% allow fish, and other aquatic organisms to move upstream and downstream of the spillway.
</abstract>

Lucian Blaga University of Sibiu, Applied Ecology Research Center

Department of Civil and Environmental Engineering

Coştei Hydrographic Diversion Node, a Historical Environment Quality and Biological Resources Accessibility Game Changer; Anthropogenic Induced Problems and Sustainable Solutions ‒ An Ichthyologic Perspective

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Transylvanian Review of Systematical and Ecological Research

 Publishing House and Owner: Lucian Blaga University of Sibiu, Romania  Founded 1999, is an international scientific publication, edited in Sibiu, Romania. It publishes original work dealing with basic aspects, particularly of ecology, systematics and related fields.  Transylvanian Review of Systematical and Ecological Research deal with the worldwide publishing of original articles and reviews related to the theoretical, experimental, and applied aspects, particularly of ecology, biology, systematics, environmental sciences and related fields. We publish high quality papers concerned to habitats, species, associations, communities, ecosystems in their natural state or under anthropogenic threats, risks, and impacts. The published information, data, discussions, and conclusions must exceed the edges of case studies, highlight significant results using any ecological approach, and for that reason only publish papers with robust ecological messages that improve our knowledge of ecological principles, reality, and trends.  Archiving  Sciendo archives the contents of this journal in Portico - digital long-term preservation service of scholarly books, journals and collections.  Plagiarism Policy  The editorial board is participating in a growing community of Similarity Check System's users in order to ensure that the content published is original and trustworthy. Similarity Check is a medium that allows for comprehensive manuscripts screening, aimed to eliminate plagiarism and provide a high standard and quality peer-review process. 

Transylvanian Review of Systematical and Ecological Research

Volume 23 (2021): Issue 3 (November 2021)

Ecological conditions of the Waterchestnut (Trapa natans L.) in the Danube Delta (Romania)

Plants, Mosses, Charophytes, Protozoan, and Bacteria Water Quality Indicators for Assessment of Organic Pollution and Trophic Status of Continental Water Bodies

A Study on Phyto-Chemical Analysis and Antibacterial Activity of Spices on Pathogenic Bacteria Isolated from Commercially Important Edible Marine Fishes, Euthynnus Affinis (Cantor), Katsuwonus Pelamis L. and Auxis Thazard (Lacepede) (Family Scombridae)

Fish Fauna of Ilisu Area on the Tigris River, Before Impoundment of the Ilisu Dam (Turkey)

Coştei Hydrographic Diversion Node, a Historical Environment Quality and Biological Resources Accessibility Game Changer; Anthropogenic Induced Problems and Sustainable Solutions ‒ An Ichthyologic Perspective

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