Trophic links and riverine effects on food webs of pelagic fish of the north-western Black Sea

2009 ◽  
Vol 60 (6) ◽  
pp. 529 ◽  
Author(s):  
Daniela Bănaru ◽  
Mireille Harmelin-Vivien
Keyword(s):  
Stable Isotope ◽  
Food Webs ◽  
Black Sea ◽  
Trophic Levels ◽  
Danube River ◽  
Horse Mackerel ◽  
Δ13c And Δ15n ◽  
The North ◽  
Coastal Marine ◽  
North Western

Improving the knowledge of trophodynamics in coastal marine ecosystems is important for fisheries management. The present study was designed to assess the influence of Danube River inputs on Romanian coastal marine food webs of the European sprat (Sprattus sprattus), the European anchovy (Engraulis encrasicholus) and the horse mackerel (Trachurus mediterraneus). Gut content analyses coupled with carbon and nitrogen stable isotope analyses described food web variations with fish size, season and distance from the Danube delta. Sprats fed on zooplankton, horse mackerel fed on polychaetes and small fish, and anchovies had an intermediate diet. The δ13C and δ15N ratios and mean trophic levels increased from sprats to anchovies and then to horse mackerel. Season strongly influenced the δ15N values of the three fishes, with lower values in spring than in autumn linked to higher Danube inputs into coastal waters in spring during the flooding period. Fish condition was related to diet and environmental factors, with higher conditions recorded in the north area in autumn and in the south area in spring. Danube River inputs influenced the diet, stable isotope ratios and condition of the main commercial pelagic migratory fishes of the north-western Black Sea.

Organic Carbon Geochemistry in the North-western Black Sea–Danube River System

2002 ◽  
Vol 54 (3) ◽  
pp. 631-641 ◽  
Author(s):  
E.M. Galimov ◽  
L.A. Kodina ◽  
L.I. Zhiltsova ◽  
V.G. Tokarev ◽  
L.N. Vlasova ◽  
...  
Keyword(s):  
Organic Carbon ◽  
Black Sea ◽  
River System ◽  
Danube River ◽  
The North ◽  
North Western

Trophic relationships among animals associated with drifting wrack

2018 ◽  
Vol 69 (8) ◽  
pp. 1248 ◽  
Author(s):  
Ryan J. Baring ◽  
Rebecca E. Lester ◽  
Peter G. Fairweather
Keyword(s):  
Stable Isotope ◽  
Food Webs ◽  
Sandy Beach ◽  
Sandy Beaches ◽  
Trophic Levels ◽  
Trophic Relationships ◽  
Gut Contents ◽  
Future Research ◽  
Δ13c And Δ15n ◽  
Trophic Pathways

Wrack accumulates commonly in surf zones of sandy beaches and can be a semipermanent feature. Very few studies have investigated the trophic pathways associated with wrack accumulations in sandy beach surf zones, despite their potential importance to nearshore food webs. In the present study, we were specifically interested in determining the fish–wrack trophic associations in the nearshore. Macrophytes, macroinvertebrates and fish were sampled from drifting wrack at two sites with different macrophyte compositions (i.e. algae v. an algae–seagrass mix) in South Australia. The gut contents of fish were sampled, and the δ13C and δ15N stable isotope signatures of fish, macroinvertebrates and macrophytes were analysed. Using both the stable isotope and diet data, we identified that fish are feeding among wrack accumulations, but some unexplained trophic pathways suggest that fish are also likely to be foraging over multiple habitats elsewhere for food. In contrast, there was more evidence that grazing macroinvertebrates may be feeding on and around macrophytes within the accumulations, as well as using them as habitat. Thus, the present study established some baseline trophic pathways associated with wrack accumulations in sandy beach surf zones. Given the modest evidence for use of wrack as a food source, the lower trophic levels of the food webs identified remain unknown and should be an area for future research.

Assessment of the Reactions of Algal Communities to Influence of Climatic Factors in the North-Western Black Sea Ecosystem

2018 ◽  
Vol 20 (2) ◽  
pp. 121-134 ◽  
Author(s):  
G. G. Minicheva ◽  
V. N. Bolshakov ◽  
E. S. Kalashnik ◽  
A. B. Zotov ◽  
A. V. Marinets
Keyword(s):  
Black Sea ◽  
Climatic Factors ◽  
Algal Communities ◽  
The North ◽  
North Western

scholarly journals Amphipod (Crustacea, Amphipoda) Communities in the North-Western Part of the Black Sea

2016 ◽  
Vol 50 (5) ◽  
pp. 387-394
Author(s):  
S. A. Kudrenko
Keyword(s):  
Species Composition ◽  
Community Composition ◽  
Black Sea ◽  
The Black Sea ◽  
Published Data ◽  
Amphipod Species ◽  
Quantitative Parameters ◽  
The North ◽  
North Western

Abstract The data about the community composition, number and biomass of amphipods in three gulfs of the North-Western Black Sea are presented. The amphipod communities of the gulfs of Yahorlyk, Karkinit, and Tendra were studied and the species composition was compared with the previously published data. For each particular gulf, the list of amphipod species was composed. The quantitative parameters of the amphipod communities in the studied localities in different years were described.

Introduction

2016 ◽  
pp. 1-8
Author(s):  
Paul Huddie
Keyword(s):  
Black Sea ◽  
Russian Empire ◽  
The Black Sea ◽  
Western Balkans ◽  
Crimean War ◽  
Black Sea Region ◽  
The North ◽  
The Russian Empire ◽  
North Western

The year 2014 marked the 160th anniversary of the beginning of the Crimean War, 1854–6. It was during that anniversary year that the names of Crimea, Sevastopol, Simferopol and the Black Sea re-entered the lexicon of Ireland, and so did the terms ‘Russian aggression’, ‘territorial violation’ and ‘weak neighbour’. Coincidentally, those same places and terms, and the sheer extent to which they perpetuated within Irish and even world media as well as popular parlance, had not been seen nor heard since 1854. It was in that year that the British and French Empires committed themselves to war in the wider Black Sea region and beyond against the Russian Empire. The latter had demonstrated clear aggression, initially diplomatic and later military, against its perceived-to-be-weak neighbour and long-term adversary in the region, the Ottoman Empire, or Turkey. As part of that aggression Russia invaded the latter’s vassal principalities in the north-western Balkans, namely Wallachia and Moldavia (part of modern-day Romania), collectively known as the Danubian Principalities. Russia had previously taken Crimea from the Ottomans in 1783....

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