Wyniki wyszukiwania - Biblioteka Nauki

1

Assessment of river health in Australia by diatom assemblages - a review

100%

John J.

Oceanological and Hydrobiological Studies

|

2004

|

tom Vol. 33, No. 2

95--104

EN

This paper summarises the findings of two national projects carried out by the author, covering the largest area ever investigated on the use of diatoms for monitoring river health in Australia, as well as to recommend future directions in diatom river monitoring in Australia. The first project (1995 to 1998) involved South-west Western Australia – well known for its forests and abundance of streams and rivers. Data on environmental variables and diatom taxa were obtained from 136 sites, out of which 117 were used as reference sites and 29 as monitoring (impacted) sites. Some 20 sites were randomly selected from the reference sites and used as "test sites" to verify internal consistency of the reference sites which were considered to be relatively pristine. The streams and rivers were finally classified into four distinct groups based upon environmental factors and diatom distribution pattern. The second project involved monitoring the health of urban streams around the city of Perth, western Australia. The investigation (1996 to 1999) focussed on classification of the urban streams based on water quality parameters and "stream conditions" and development of a predictive model using diatoms as biomonitors. Close to 180 sites were sampled with 30 environmental variables measured. All the sites were classified on the basis of seven environmental variables with the highest correlation coefficient with the sites, using the multivariate pattern analysis program PATN. The reference and monitoring sites were mostly separated on the basis of environmental factors and distinct diatom assemblages. Currently, a national protocol for assessing the health of all rivers using diatoms in Australia is being compiled.

2

Eucaryotic algae and cyanobacteria in the River Dunajec upstream and downstream from the new dam reservoirs in Czorsztyn and Sromowce and their use for monitoring

100%

Mrozińska-Broda T. , Czerwik-Marcinkowska J.

Oceanological and Hydrobiological Studies

|

2004

|

tom Vol. 33, No. 3

83--97

EN

This report presents results of the studies conducted in 2002 of eukaryotic algae and cyanobacteria found in the River Dunajec in the area of the newly built dam reservoirs in Czorsztyn and Sromowce. The studies demonstrated that diatoms were the dominant group in both the river (at 74 %) and the dam reservoirs (at 32 %), and that among the diatoms collected, eutraphenthic [van Dam et al. 1994] species usually prevailed. The diatom group, characterized by a broad ecological scale (tolerant), predominated slightly only at Station 3 located downstream from the dam reservoirs. This variation, which was probably connected with improved water quality in this part of the river, was the result of the sedimentation of pollutants in the dam reservoirs. Equally unexpected was the mass development of Didymosphenia geminata in this area. It occupied not only spots in the riverbed of the River Dunajec, but it also spread to the riversides and even to the river arms close to the confluence of the streams flowing from the Pieniny Mountains. The quantitatively dominant species in this area was Cladophora glomerata, which is an excellent habitat for other algae, particularly diatoms. The ultrastructure of its cell and cell wall is of great significance since it reflects the environmental conditions in which it lives. The ultrastructure of the Cladophora glomerata that occurred at different stations did not differ significantly, nor did it indicate the existence of any considerable hazard resulting from environmental pollution.

3

International and European standards for algalbased monitoring

100%

Kelly M.

Oceanological and Hydrobiological Studies

|

2004

|

tom Vol. 33, No. 1

77--85

EN

International and European standards relevant to algal-based monitoring have been developed by the International Standards Organisation (ISO) and the Comité Européen de Normalisation (CEN). This work has been given new impetus by the publication of the EU Water Framework Directive (2000/60/EC), which requires the use of CEN and ISO standards where available. Standards addressing diatom sampling and analysis, macrophyte survey, algal survey and phytoplankton analysis are all either published or under development by CEN. There is also a standard under development dealing with quality assurance of ecological assessments in the aquatic environment. Together, these standards should ensure that robust data are collected that can be used for intercalibrations between Member States.

4

Diatom biomonitoring : scientific foundations, commonly discussed issues and frequently made errors

100%

Szczepocka E. , Żelazna-Wieczorek J.

|

tom Vol. 47, No. 3

313--325

EN

Contemporary assessment of the ecological status of aquatic ecosystems is based on various groups of organisms, including diatoms. Biological assessment, implemented by the Water Framework Directive, has been applied worldwide for more than 15 years. Currently, the most basic “tool” used in biomonitoring are diatom indices, which are routinely applied in Europe and other countries around the world. In Poland, the diatom indices have been used for over 5 years, which is a period of time allowing to summarize and evaluate the effectiveness of these methods in the assessment of aquatic ecosystems. The purpose of this work was to analyse the use of diatom indices in the biomonitoring of surface water by collecting data on the possibilities and limitations of using diatom indices for the objective assessment of water quality. Attention was paid to mistakes made in the course of biological assessment performed with the use of diatom phytobenthos, which have a significant impact on the obtained results. The paper also contains suggestions for introducing several important changes in biological monitoring, which will improve its quality and efficiency in assessing the ecological status of various aquatic ecosystems.

5

First new record of two diatoms (Caloneis africana (Giffen) Stidolph and Luticola nivalis (Ehrenberg) D. G. Mann) from South West Coast of India (Cochin backwaters)

100%

Joseph G. , Francis M. S.

Oceanologia

|

2019

|

tom No. 61 (3)

395--399

EN

The main objective of this paper is to report two diatoms (Caloneis africana (Giffen) Stidolph and Luticola nivalis (Ehrenberg) D. G. Mann) from Cochin backwaters, which prove to be a new finding from Indian waters. Surface water samples were collected monthly from twelve stations covering the ecosystem from May 2015 to April 2016. The analysis of physicochemical parameters and the preparation of permanent slides of diatoms were performed based on standard procedures. Descriptions, world distribution and photographs of the two diatoms are included in this paper. These two new species further enrich the diatom floristic diversity of Cochin backwaters in India.

6

Holocene diatom biostratigraphy of the southwestern Gulf of Gdańsk, southern Baltic Sea (Part I)

100%

Witak M. , Jankowska D. , Piekarek-Jankowska H.

Oceanological and Hydrobiological Studies

|

2006

|

tom Vol. 35, No.4

307-329

EN

The aim of the study was to analyze the diatom taphocoenoses preserved in the Holocene sediments of the southwestern Gulf of Gdańsk (southern Baltic Sea). Three sediment cores collected at sites located between the tip of the Hel Peninsula and Gdynia were used to reconstruct environmental changes that have occurred over the last 9 ka. The floristic spectrum and the distribution of ecological groups indicate that the diatom flora developed during four Baltic Sea paleoecological stages; thus, the Ancylus Lake, Mastogloia Sea, Littorina Sea, and Post-Littorina Sea stages are discussed. The anthropogenic assemblage in the superficial sediments of the study area is also described.

7

Chaetoceros resting spores as indicators of Holocene paleoenvironmental changes in the Gulf of Gdańsk, southern Baltic Sea

100%

Witak M. , Dunder J. , Leśniewska M.

Oceanological and Hydrobiological Studies

|

2011

|

tom Vol. 40, No.4

21-29

EN

The aim of this study was to analyze resting spores of Chaetoceros spp. preserved in Middle and Late Holocene sediments of the three parts of the Gulf of Gdańsk, southern Baltic Sea. The material studied consists of ten cores retrieved from Kuźnica Deep (Puck Lagoon), as well as the shallower and deeper parts of the Outer Puck Bay region. Our results indicate that the abundance of Chaetoceros resting spores in diatom taphocoenoses corresponded to regional and local paleoecological changes registered in Mastogloia, Littorina and Post-Littorina sediments, and that they also reflect human impact in the last hundred years.

8

Holocene diatom biostratigraphy of the SW Gulf of Gdańsk, Southern Baltic Sea (part II)

100%

Witak M. , Dunder J.

Oceanological and Hydrobiological Studies

|

2007

|

tom Vol. 36, No.3

3-20

EN

The diatom records of two sediment cores taken in the SW part of the Gulf of Gdańsk indicate paleoenvironmental variability in the last three stages of formation of the Baltic Sea: the Mastogloia, the Littorina and the Post-Littorina. Diatom community compositions of the cores show the influence of several factors on past environmental conditions of the study area: (1) regional salinity changes, (2) changes of the Vistula River inflow, and (3) sedimentary processes connected with the Hel Peninsula development.

9

A diatom record of late Holocene environmental changes in the Gulf of Gdańsk

100%

Witak M.

Oceanological Studies

|

2000

|

tom Vol. 29, No. 2

57-74

EN

The aim of this study was to analyse fossil and subfossil diatom floras preserved in a sediment core taken from the Gulf of Gdansk, near the eastern end of the Hel Peninsula. The diatom record, supported by lithology and radiocarbon data, indicates environmental changes during the later stages of development of the Baltic Sea. In the Litorina Sea stage the diatom flora developed under marine conditions, whereas during the Post-Litorina stage there was a decrease in salinity. During the Subatlantic period the sublittoral diatom flora was replaced by shallow water diatoms originating from the coastal zone, and were redeposited in the deeper part of the basin. In the surface sediments the change to a presumably anthropogenically-influenced diatom flora can be attributed to the eutrophication of the Gulf of Gdańsk.

10

Water quality assessment using diatoms in the Bzura River)

100%

Szczepocka E.

Oceanological and Hydrobiological Studies

|

2005

|

tom Vol. 34, No.4

67--79

EN

The Bzura River is a left-side tributary of the Vistula River; it flows across the Łódzkie and Mazowieckie Voivodeships. It is a typical lowland river, 166.2 km in length, has its sources in the town of Łódź, and outflows at the town of Wyszogród. Between 1956 and 1997 the Bzura was one of the most polluted rivers in Poland. Since 1998 a decisive decease in the value of pollution indices has been observed. Between 1998 and 2001 a quantitative and qualitative study of diatom communities and an assessment of water quality of the river was carried out on the basis of microbenthos samples, applying Lange-Bertalot’s (1994) species diversity method, which takes advantage of the various diatom tolerances to pollution. Three sections of the river (upper, middle and lower) were investigated at six sites (Arturówek, Ozorków, Łęczyca, Łowicz, Sochaczew and Wyszogród). As a result, the Bzura’s water quality was determined to be of Water Purity Classes II and II-III. The source section (Arturówek) decisively fulfils the requirements of Water Purity Class II – sensitive diatom taxa constituted over 50% of the diatom assemblage there. At Ozorków and Łęczyca water declined to Class II-III – it was the river’s section impacted by the “Boruta” Industrial Dye Works and the Łęczyca Mining Works. The percentage of sensitive species was over 10 and of tolerant ones below 50. Water quality in the middle section (Łowicz, Sochaczew) indicated Water Purity Class II – decisively sensitive species dominated there (above 50%). In the outflow section the percentage relationship between species indicated Water Purity Class II-III of the river’s water. Results of biological and physico-chemical investigations are congruent with each other and prove that the Bzura River, which until recently was a “sewage ditch”, is regenerating and reviving.

11

Holocene environmental changes recorded by diatom stratigraphy in the Vistula Lagoon

100%

Witak M. , Boryń K. , Mayer A.

Oceanological and Hydrobiological Studies

|

2005

|

tom Vol. 34, No.2

111--133

EN

Four 6 m long sediment cores from the Vistula Lagoon were analyzed with respect to their content of diatoms. The aim was to detect changes of the composition of the diatom flora and to link these changes to Holocene climatic fluctuations and paleoecological stages of the Baltic Sea. The location of cores creates a good opportunity for reconstruction environmental changes both in the northern and southern part of the lagoon. Based on species composition of the diatom flora, distribution of salinity and habitat groups and stratigraphical information supported by 14C data and lithological analyses four diatom assemblage zones were distinguished in each core. The study shows that the area originally had a terrestrial environment, whereas its later evolution is linked with the marine stages of the Baltic Sea. The northern part of the lagoon originated due to input of marine waters through the Vistula Spit, which is indirectly connected with two Littorina transgressions. Next, probably in Late Atlantic-Early Subboreal period, the basin expanded southwards caused by intensification of marine water inflow during maximum Littorina transgressions. As a result the shallow, eutrophic, brackish water basin originated. In Subboreal period the basin became shallower and slightly brackish water. However, intensive Bauda river inflow caused locally decreasing of salinity. Moreover, symptoms of Post-Littorina transgression in Subatlantic chronozone were observed in the diatom record. Finally, the effects of eutrophication are recorded in subfossil diatom flora. Moreover, as a consequence of closing the Nogat river inflow, the stronger influence of marine waters from the Baltic Sea are observed in the lagoon.

12

Marine Microalgae Assemblages of the East Java Coast Based on Sub-Habitats Representatives and their Relationship to the Environmental Factors

100%

Mahmudi M. , Arsad S. , Musa M. , Lusiana E. D. , Buwono N. R. , Indahwati A. D. , Irmawati , Sukmaputri N. A. , Prasasti A. L. , Larasati A. P. , Sharfina A. A. S. , Aldhiya P. R. , Mutiara R. , Putri S. G.

Journal of Ecological Engineering

|

2023

|

tom Vol. 24, nr 12

268--281

EN

The East Java coast has biodiversity potential, including microalgae. Microalgae are primary producers for the aquatic ecosystem, whose distribution depends on water quality parameters and sub-habitat characteristics. The purpose of this study was to analyse and identify the microalgae, as well as environmental quality parameters based on sub-habitat characteristics in the northern part of the East Java coast, Indonesia. The research was conducted from March to June 2023. Sample sites were determined using purposive sampling techniques at nine sites located in Gresik, Lamongan, and Tuban coasts. Water samples were collected from various sub-habitats, including the water column, sediments, rocks, mangroves, artificial substrates, macroalgae, and water plants consisting of water hyacinth (Eichhornia crassipes) and Coontail (Ceratophyllum demersum). The obtained results depicted microalgae found were from Bacillariophyceae, Chlorophyceae, Chrysophyceae, Coscinodiscophyceae, Cyanophyceae, Dinophyceae, Trebouxiophyceae, and Zygnematophyceae. Bacillariophyceae dominated the community in all sites. The expected outcome of this study is to provide and complete the database of microalgae morphologically based on sub-habitat characteristics, particularly on the north coast of East Java, Indonesia.

13

Holocene diatom biostratigraphy of the SW Gulf of Gdańsk, Southern Baltic Sea (part III)

100%

Leśniewska M. , Witak M.

Oceanological and Hydrobiological Studies

|

2008

|

tom Vol. 37, No.4

35-52

EN

The palaeoenvironmental changes of the south-western part of the Gulf of Gdańsk during the last 8,000 years, with reference to the stages of the Baltic Sea, were reconstructed. Diatom analyses of two cores taken from the shallower and deeper parts of the basin enabled the conclusion to be drawn that the microflora studied developed in the three Baltic phases: Mastogloia, Littorina and Post-Littorina. Moreover, the so-called anthropogenic assemblage was observed in subbottom sediments of the study area.

14

Live autochthonous benthic diatoms on the lower depths of Arctic continental shelf. Preliminary results

100%

Druzhkova E. , Oleinik A. , Makarevich P.

Oceanologia

|

2018

|

tom No. 60 (1)

97--100

EN

An autochthonous community of benthic diatoms was discovered in June 2015 in the upper sediment layer at depths of 170, 205, and 245 m in the central Barents Sea. At least three benthic microalgae species (Gyrosigma fasciola, Pleurosigma angulatum, and Pleurosigma sp. 1) were detected in the sediment but not the upper water column. Analyses revealed that these benthic microalgae represent a depleted fragment of Arctic littoral microphytobenthos. Compared with the littoral flora, the deep-water assemblage is less diverse and displays low abundance. The data reported here challenge the generally accepted belief that the presence of certain microalgae at significant depths results from vertical or horizontal transfer.

15

A first ecological evaluation of the diatom flora in Central Europe: species diversity, selective human interactions and the need for habitat protection

88%

Lange-Bertalot H.

|

1998

|

tom Vol. 27, No. 2

5-12

EN

The recently revised check-list of diatoms found in Germany contains 1437 taxa (1632 taxa have been recorded for Central Europe). Clear correlations with ecological conditions were established for 1000 taxa (70% of 1437). 267 predominantly marine taxa also occur in inland waters; they penetrate progressively into rivers contaminated with industrial waste waters. 61 taxa are aerophilic and 164 eutraphentic, 91 tolerant to all trophic conditions. Very few species in these ecological groupings are endangered. However, at last 417 oligo- or slightly mesotraphentic taxa are included in the "Red List". This strongly indicates that conserving oligo- and dystrophic waters as well as lower mesotrophic habitats can best protect species diversity.

16

Holocene environmental instability as recorded in a core from the Słupsk Furrow, Southern Baltic

88%

Zgrundo A.

|

tom Vol. 28, No. 3-4

59-73

EN

The aim of the study was to investigate Holocene history as recorded in a single sediment core taken from the Słupsk Furrow, southern Baltic Sea, with the use of diatom analysis. Diatom stratigraphy and abundance of cysts of Chrysophyceae Pascher enabled the changes in salinity and depth of the Baltic during the last 7500 years or so to be followed. Four developmental stages of the Baltic Sea were distinguished on this basis: the decline of the Ancylus Lake (or the Ancylus/Mastogloia transition), the Mastogloia Sea, the Litorina Sea and the Postlitorina Sea.

17

Eutrophication of Lake Święte (Gniezno, Western Poland) as evidenced by succession of algal assemblages in sedimentary record

88%

Machowiak D.

|

1998

|

tom Vol. 27, No. 2

83-86

EN

The subject of the study was to the compare results of phytoplankton and the sediment core analyses from several lakes in Wielkopolska (Western Poland). Species composition of algal assemblages occurring in these lakes changed as would be expected for increasing trophic conditions. Along with progressive eutrophication diatom taxa belonging to genera Stephanodiscus and Cyclotella became replaced by green algae and finally by blue-green algae. The dominance of blue-green algae is attributed to hypertrophic conditions.

18

Applicability of diatom indices for monitoring water quality in coastal streams in the Gulf of Gdańsk Region, northern Poland

88%

Zgrundo A. , Bogaczewicz-Adamczak B.

Oceanological and Hydrobiological Studies

|

2004

|

tom Vol. 33, No. 3

31--46

EN

This aim of this study was to test the applicability of diatom indices developed in Europe for monitoring coastal stream waters in northern Poland. Water, sediment, and diatom samples were taken from streams in the resort town of Sopot that discharge into the Gulf of Gdańsk. The physical and chemical measurements taken during the sampling period indicated that the purity of the stream waters had improved, and recently they were classified as I class water purity. This is contrasted by the studied waters’ diatom communities, which were dominated by eutraphentic taxa. High abundances of ß-mesosaprobic and α-mesosaprobic taxa were recorded at most of the sites. Diatom indices developed for water quality surveillance were calculated with the Omnidia 3 database software. Redundancy analyses (RDA), an ordination technique, was used to determine the indices that best correspond to water pollution in coastal streams.

19

Diatoms (Bacillariophyta) of the world’s highest aquatic environments from the Western Himalayas, India

88%

Pardhi S. , Thiruvalan T. , Thacker M. , Alakananda B. , Karthick B.

Oceanological and Hydrobiological Studies

|

2023

|

tom Vol. 52, No. 2

172--205

EN

The present study is a preliminary taxonomic surveyof diatom assemblages from one of the highest mountainranges in the Western Himalayas – Ladakh. 37 sampleswere collected from 19 different sampling sites at altitudes ranging from 3100–4552 amsl. The diatom communities were representative of habitats such as lakes, streams, and hot springs from high altitudes. The dominant diatomsare studied using light microscopy and identified using valve morphometrics. The study enlists a total of 74 taxa belonging to 40 genera along with photomicrographic plates. Commonly-found species of high-altitude hot springs habitats were Gogorevia exilis and Denticula thermaloides.Reimeria sinuata, Fragilaria vaucheriae, Gomphonella cf.olivacea, Encyonema ventricosum, Lindavia biswashanti,Diatoma moniliformis, and Denticula valida were commonly occurring species in stream, river and lake habitats. Further analysis and putative novel species from this high-altitude environment will be described in future publications.

20

Physicochemical Properties of Silt Loamy Soil and Diversity of Diatom Species Under Winter Wheat and Oats

88%

Stanek-Tarkowska J. , Czyż E. A. , Kaniuczak J. , Poradowska A.

|

tom Vol. 18, nr 6

142--151

EN

The aim of the research was to investigate the soil properties and the species diversity of diatoms growing in different agricultural fields with silt loamy soil. The field experiment was conducted in 2014 in Kosina, near Łańcut (SE Poland), at three sites (indicated as fields K1, K2, K3) with different soil environmental conditions and plants. The growth of winter wheat Triticum aestivum (cv. Bogatka) in fields K1 and K2 and oats Avena Sativa (cv. Haker) in field K3 under different soil management were studied. The soil samples were collected from the top layers (0–5 cm depth) each month, from April to December. Certain physical and chemical parameters of soil were measured. The pH of soil was acidic and slightly acidic in fields K1 (5.0–5.4), K2 (4.9–5.9) and K3 (4.5–5.1). The soil in field K3 had a significantly greater content of organic matter (1.06–1.30%) and water content (12.9–33.8%, v/v) than fields K1 and K2. A total of 91 diatom taxa were found. The diversity was greatest in field K2 (71 taxa), lower in K1 (54 taxa) and K3 (24 taxa). In K1, the most numerous species were Luticola D.G. Mann cf. mutica, Mayamaea atomus var. permitis (Hust.) Lange-Bertalot, and Stauroneis thermicola (Petersen) Lund, with more than a 20% share in the assemblage. In K2, very abundant assemblages were formed by Mayamaea atomus (Kütz.) Lange Bertalot, Mayamaea atomus var. permitis (Hust.) Lange-Bertalot, and Stauroneis thermicola (Petersen) Lund with a 25 to 50% share in the total diatom community. In K3, with oat cultivation, a different diatom species structure was found. Here, the most abundant were Halamphora montana (Krasske) Levkov, Hantzchia amphioxys (Ehrenb.) Grunow, Mayamaea atomus (Kütz.) Lange-Bertalot, and Nitzschia pusilla Grunow, which attained a share in the assemblage exceeding than 20%. The effects of different soil management regimes under different plants on the physical and chemical properties of the soil, and on the diversity of diatoms, were significant (P<0.05). Soil water and organic matter content affects the yield of winter wheat and oats. Significant effects of water content and pH of silt loamy soil on the growth and the diversity of species of diatoms were found.