scholarly journals ASSESSMENT OF THE ECOLOGICAL POTENTIAL OF HEAVILY MODIFIED WATER BODIES IN THE BASILICATA REGION, ITALY: CASE STUDY OF THE AGRI RIVER BASIN

2019 ◽  
Author(s):  
FRANCESCO ARBIA ◽  
LORENA DI GIUSEPPE ◽  
RAFFAELE GIAMPIETRO ◽  
MICHELE GRECO ◽  
PATRIZIA MAURO ◽  
...  
Keyword(s):  
River Basin ◽  
Water Bodies ◽  
Basilicata Region ◽  
Heavily Modified Water Bodies ◽  
Ecological Potential

scholarly journals Setting of Water-protective Activity Priorities in a River Basin on the Basis of Water Quality Objectives (the Ob River Basin as a Case Study)

2013 ◽  
pp. 6-25
Author(s):  
Keyword(s):  
Water Quality ◽  
River Basin ◽  
Water Bodies ◽  
Protective Activity ◽  
Practical Application ◽  
Protective Measures ◽  
Ob River ◽  
Surface Water Bodies ◽  
Water Quality Objectives

The authors’ method of setting surface water bodies’ water quality objectives defined upon the outputs of application at a number of river basins has been given. An algorithm of determination the priority water-protective measures in a river basin on the basis of water quality objectives has been proposed Practical application of the approaches proposed by the authors has been illustrated by examples from the Scheme of Water Bodies’ Integrated Use and Protection for the Ob River basin.

Identification of sibling species in the genus Eucyclops from water-bodies of Ukraine and Russia using crossbreeding studies

2014 ◽  
Vol 25 (1-2) ◽  
pp. 61-68 ◽  
Author(s):  
V. I. Monchenko ◽  
L. P. Gaponova ◽  
V. R. Alekseev
Keyword(s):  
Cryptic Species ◽  
River Basin ◽  
Black Sea ◽  
Species Complex ◽  
River Basins ◽  
Water Bodies ◽  
Similar Species ◽  
Basin Water ◽  
Different Populations ◽  
Baltic Sea Basin

Crossbreeding experiments were used to estimate cryptic species in water bodies of Ukraine and Russia because the most useful criterion in species independence is reproductive isolation. The problem of cryptic species in the genus Eucyclops was examined using interpopulation crosses of populations collected from Baltic Sea basin (pond of Strelka river basin) and Black Sea basin (water-reservoires of Dnieper, Dniester and Danube rivers basins). The results of reciprocal crosses in Eucyclops serrulatus-group are shown that E. serrulatus from different populations but from water bodies belonging to the same river basin crossed each others successfully. The interpopulation crosses of E. serrulatus populations collected from different river basins (Dnipro, Danube and Dniester river basins) were sterile. In this group of experiments we assigned evidence of sterility to four categories: 1) incomplete copulation or absence of copulation; 2) nonviable eggs; 3) absence of egg membranes or egg sacs 4) empty egg membranes. These crossbreeding studies suggest the presence of cryptic species in the E. serrulatus inhabiting ecologically different populations in many parts of its range. The same crossbreeding experiments were carries out between Eucyclops serrulatus and morphological similar species – Eucyclops macruroides from Baltic and Black Sea basins. The reciprocal crossings between these two species were sterile. Thus taxonomic heterogeneity among species of genus Eucyclops lower in E. macruroides than in E. serrulatus. The interpopulation crosses of E. macruroides populations collected from distant part of range were fertile. These crossbreeding studies suggest that E. macruroides species complex was evaluated as more stable than E. serrulatus species complex.

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