The status of fish populations in the Clyde Estuary

1986 ◽  
Vol 90 ◽  
pp. 157-170 ◽  
Author(s):  
Anne R. Henderson ◽  
James D. Hamilton
Keyword(s):  
Species Composition ◽  
Fresh Water ◽  
Marine Species ◽  
Organic Pollution ◽  
Fish Populations ◽  
Spatial Fluctuations ◽  
The Status ◽  
Species Composition And Distribution ◽  
The City ◽  
Length Frequency Data

SynopsisChanges in the status of fish populations in the Clyde Estuary between Woodhall and Glasgow since 1978 are described and data presented on species composition and distribution, temporal and spatial fluctuations in abundance and biomass and length frequency data for certain species are analysed.The seaward part of the estuary is colonised by marine and euryhaline marine species dominated by flounder, while the ‘city reaches’ have a fresh water component dominated by three-spined stickleback and eel in addition to several euryhaline species, e.g. sand-goby and saithe.The extent of biological recovery of the estuary from severe organic pollution can be gauged from the presence now of thirty-four species, including nineteen in the city reaches which were virtually fishless in the mid nineteenth century. The upper estuary is now able to support resident and migratory fish for much of the year, but species composition and abundance are markedly affected by seasonally variable fresh water flows to the estuary affecting primarily dissolved oxygen and salinity, leading to mortalities among resident species and providing a barrier to migrants.

scholarly journals Seasonal variation of zooplankton in Ba Lai river, Ben Tre province

2020 ◽  
Vol 4 (4) ◽  
pp. First
Author(s):  
Nhi Nguyen Y Ha ◽  
My Ngoc Diem Tran
Keyword(s):  
Seasonal Variation ◽  
Species Composition ◽  
Fresh Water ◽  
Rainy Season ◽  
Salt Water ◽  
Zooplankton Community ◽  
Marine Species ◽  
Dry Season ◽  
Sampling Points ◽  
Zooplankton Communities

The purpose of research is studying the variation of zooplankton community in Ba Lai river in Ben Tre province. Research was conducted in 2 seasons: rainy season (December, 2017) and dry season (March, 2018). There were 7 sampling points in Ba Lai river, Ben Tre province. Our study recorded 95 taxa zooplankton belong to 56 genera, 39 families, 12 orders, 8 classes and 5 phylums. Generally, Rotifers had highest munbers of species among 2 seasons. Rotifers were dominant in density and species composition at all sampling points in the rainy season. Copepods were dominant in density and species composition in the dry season. There were some marine species present at sampling points during the dry season. In addition, the Bray - Curtis analysis showed that the similarity of the zooplankton communities between rainy season and dry season at sampling points wasnot high. This suggests that there was a shift in the structure of the zooplankton community between rainy season and dry season. These are proof to prove the salinity rising in Ba Lai river in dry season. Although there is an irrigation dam to prevent the infiltration of salt water, but the infiltration of salt water is happening. A solution to preserve fresh water to provide local people in dry season is necessary.

scholarly journals Species composition and distribution of the genus Liquidambar L. (ALTINGIACEAE) in Ukraine

2021 ◽  
pp. 274-277
Author(s):  
N. M. Smilyanets ◽  
I. M. Svitylko
Keyword(s):  
Species Composition ◽  
Positive Experience ◽  
Botanical Gardens ◽  
Single Location ◽  
Species Composition And Distribution ◽  
Forest Parks ◽  
The City ◽  
Autonomous Republic ◽  
City Park

A screening of 50 institutions (botanical gardens, arboretums, parks, squares) was conducted with a view to study of species composition and the distribution of genus Liquidambar L. (ALTINGIACEAE) in Ukrainia. L. styraci- flua L. was recorded — in 26 botanical gardens, parks, squares etc; L. formosana Hanse — in 2 botanical gardens; decorative forms L. styraciflua 'Variegata pendula' — in one arboretum; L. styraciflua 'Worplesdon'; — in landscaping of the city park; L. styracifluа ‘Pasquali’ — in landscaping of the city park. Distribution of the species L. orientalis Mill. and L. acalicina Hang N. Chang need more research. Positive experience of using representatives Liquidambar genus registered in the following regions of Ukraine: Zakarpattia, Ternopil, Lviv, Dnipropetrovsk, Kyiv, Cherkasy, Chernivtsi, Kharkiv, Donetsk areas, Autonomous Republic Crimea. So, it is perspective using representatives of the Liquidambar genus in landscape construction for group creations, single location іn parks, squares, zoos, forest parks, for landscaping streets, boulevards, squares, near houses territories, administrative buildings, private gardens, in exposition of botanical gardens and arboretums.

Mites of the family Phytoseiidae (Parasitiformes, Mesostigmata) at the plants in Brovary town

2014 ◽  
Vol 25 (3-4) ◽  
pp. 77-83
Author(s):  
S. L. Grabovska ◽  
L. O. Kolodochka
Keyword(s):  
Phytoseiid Mites ◽  
Plant Associations ◽  
Species Complexes ◽  
District Center ◽  
The Family ◽  
Species Composition And Distribution ◽  
Dog Rose ◽  
The City ◽  
Species Being

This article deals with the results of study of species content and basic peculiarities of beaked mites-Phytoseiidae in plant associations of one of the regional centers of Ukraine. The species composition and distribution of mites-Phytoseiidae (Parasitiformes, Phytoseiidae) in plantations of Brovary town of Kyiv region were determined. Fourteen species of 8 genera of phytoseiid mites were found. Index of their existing and relative biotope connection of each registered species to vegetation types and plant species were computed. The study was conducted according to the results of material treatment on the territory of the mentioned city from 25 species of plants (16 species of hardy-shrub and 9 of herbaceous vegetations). The studies of distribution of plant-living mites-Phytoseiidae were conducted separately for hardy-shrub and herbaceous plants). The collection of faunistic material was executed during the vegetation of periods of 2011 and 2013. Within the city the collection of the material was conducted with hardy-shrub plants and herbaceous type of vegetation along the streets, in parks and squares of Brovary city of Kyiv region, district center, one of the satellite-cities of Kiev, the capital of Ukraine. The study of species complexes characteristics of mites was conducted with usage of data calculated on the basis of frequency index (Is), degree of relative habitat confinedness (F) (Pesenko, 1982) and domination index Paliy-Kovnatski (Di) (Shitikov, 2003). Only on one species of plant (F=1) 6 species of mites-Phytoseiidae were found – T.сotoneastri on blue spruce, T. laurae – on common spruce, T. aceri – on ash-leaved maple, P. incognitus – on dog-rose, P. soleiger – on mulberry-tree, A. caudiglans – on sea-buckthorn. These species can be related to stenoecic. The mentioned species are stenotopic only in relation to the sample of plants from the plant associations of Brovary, as in other regions these species of mites can populate the other species of plants. The rest 8 species, being registered on two or more types of plants, are related to euryoecic. Among them there is a group of 6 species with “positive tendencies to population of plants”, owning the indicators of habitat confinedness 0<F<1: A. andersoni (0,92–0,96), A. rademacheri (0,85–0,96), N. herbarius (0,92–0,96), T. tiliarum (0,66–0,77), A. pirianykae (0,73–0,99), A. clavata (0,82–0,98). The rest species, E. finlandicus и K. aberrans, have the expanded range of indicators in relation to habitat confinedness (-0,71<F<0,55 и -0,16<F<0,88), that specifies on their ability to populate the big quality of species. E. finlandicus has the negative indicator of relative habitat confinedness in relation to the plants of herbaceous morphotype that serves confirmation of the ecological peculiarity of the species detected earlier. The data of relative habitat confinedness of mites to certain species of plants shows availability of stenoecic (T.сotoneastri, T. laurae, T. aceri, P. incognitus, P. soleiger, A. caudiglans) and euryoecic species (A. andersoni, A. rademacheri, N. herbarius, E. finlandicus, K. aberrans, T. tiliarum, A. pirianykae, A. clavata). 

Species composition and distribution of marine macro algae at Co To and Thanh Lan archipelago

2020 ◽  
Vol 20 (3) ◽  
pp. 267-276
Author(s):  
Dam Duc Tien ◽  
Nguyen Thi Mai Anh ◽  
Linh Manh Nguyen ◽  
Pham Thu Hue ◽  
Lawrence Liao
Keyword(s):  
Species Composition ◽  
Littoral Zone ◽  
Marine Algae ◽  
Similarity Coefficient ◽  
Algal Flora ◽  
Average Value ◽  
Site Number ◽  
Species Composition And Distribution ◽  
Total Species ◽  
Macro Algae

This paper exhibites species composition and distribution of marine seaweed at 10 sites of Co To and Thanh Lan islands in May 2019. The studies record 76 species of marine algae in the area, belonging to four divisions: Cyanophytes, Rhodophytes, Ochrophytes and Chlorophytes. Among them, five species are classified into Cyanophytes (comprising 6.6% of total species); thirty-four species into Rhodophytes (44.7%); twenty-one species into Ochrophytes/Phaeophytes (27.6%) and sixteen species into Chlorophytes (21.1%). The species composition of marine seaweeds in Co To and Thanh Lan shows significant differences as follows: 22 species (sites number 4 and 10) to 58 species (site number 2) and the average value is 38.7 species per site. Sørensen similarity coefficient fluctuates from 0.33 (sites number 5 and 10) to 0.84 (sites number 1 and 3) and the average value is 0.53. The current investigations show that four species of twenty-one species are collected in the littoral zone and forty-two species in the sub-littoral zone (in which there are thirteen species distributed in both littoral zone and sub-littoral zone). The algal flora in Co To and Thanh Lan is characterized by subtropics.

Changes in the species composition and distribution of butterflies (Rhopalocera) in Cracow (Poland) since the mid-19th century

2005 ◽  
Vol 48 (2) ◽  
pp. 181-215 ◽  
Author(s):  
Edward Palik ◽  
Łukasz Przybyłowicz ◽  
Andrzej Kosior ◽  
Wiesław Król ◽  
Wojciech Solarz ◽  
...  
Keyword(s):  
Species Composition ◽  
19Th Century ◽  
Species Composition And Distribution

FORMATION OF FORTIFICATION ART IN ANCIENT EAST COUNTRIES

2019 ◽  
Vol 21 (4) ◽  
pp. 94-124
Author(s):  
Е. N. Polyakov ◽  
M. I. Korzh
Keyword(s):  
Ancient Egypt ◽  
Building Structures ◽  
Ancient China ◽  
Natural Landscape ◽  
Advantages And Disadvantages ◽  
Medieval China ◽  
The Status ◽  
Architectural Structures ◽  
The City ◽  
New Babylon

The article presents a comparative analysis of fortification art monuments in such East countries from Ancient Egypt to medieval China. An attempt is made to identify the main stages of the fortification development from a stand-alone fortress (citadel, fort) to the most complex systems of urban and border fortifications, including moats, walls and gates, battle towers. It is shown that the nature of these architectural structures is determined by the status of the city or settlement, its natural landscape, building structures and materials, the development of military and engineering art. The materials from poliorceticon (Greek: poliorketikon, poliorketika), illustrate the main types of siege machines and mechanisms. The advantages and disadvantages of boundary shafts and long walls (limes). The most striking examples are the defensive systems of Assyria, New Babylon, Judea and Ancient China.

EAST INDIAN AND OTHER DOCKS IN LONDON: IMPERIAL ARCHITECTURE, COLONIAL TRADE AND POSTCOLONIAL MEMORY

2020 ◽  
pp. 190-205
Author(s):  
S. E. Sidorova ◽  
Keyword(s):  
20Th Century ◽  
Industrial Revolution ◽  
Historical Memory ◽  
Visual Image ◽  
East Indian ◽  
Architectural Representation ◽  
The World ◽  
The Status ◽  
Postcolonial History ◽  
The City

The article concentrates on the colonial and postcolonial history, architecture and topography of the southeastern areas of London, where on both banks of the River Thames in the 18th–20th centuries there were located the docks, which became an architectural and engineering response to the rapidly developing trade of England with territories in the Western and Eastern hemispheres of the world. Constructions for various purposes — pools for loading, unloading and repairing ships, piers, shipyards, office and warehouse premises, sites equipped with forges, carpenter’s workshops, shops, canteens, hotels — have radically changed the bank line of the Thames and appearance of the British capital, which has acquired the status of the center of a huge empire. Docks, which by the beginning of the 20th century, occupied an area of 21 hectares, were the seamy side of an imperial-colonial enterprise, a space of hard and routine work that had a specific architectural representation. It was a necessary part of the city intended for the exchange of goods, where the usual ideas about the beauty gave way to considerations of safety, functionality and economy. Not distinguished by architectural grace, chaotically built up, dirty, smoky and fetid, the area was one of the most significant symbols of England during the industrial revolution and colonial rule. The visual image of this greatness was strikingly different from the architectural samples of previous eras, forcing contemporaries to get used to the new industrial aesthetics. Having disappeared in the second half of the 20th century from the city map, they continue to retain a special place in the mental landscape of the city and the historical memory of the townspeople, which is reflected in the chain of museums located in this area that tell the history of English navigation, England’s participation in geographical discoveries, the stages of conquering the world, creating an empire and ways to acquire the wealth of the nation.

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