Colonization dynamics of periphytic ciliate communities across taxonomic levels using an artificial substrate for monitoring water quality in coastal waters

2010 ◽  
Vol 91 (1) ◽  
pp. 91-96 ◽  
Author(s):  
Henglong Xu ◽  
Joon-Ki Choi ◽  
Gi-Sik Min ◽  
Qinglin Zhu
Keyword(s):  
Water Quality ◽  
Coastal Waters ◽  
Marine Ecosystem ◽  
Taxonomic Diversity ◽  
Artificial Substrate ◽  
Taxonomic Distinctness ◽  
System 2 ◽  
Colonization Dynamics ◽  
Colonization Patterns ◽  
Lower Variability

Taxonomic diversity and temporal patterns in abundance of periphytic ciliate communities across taxonomic levels were studied to monitor water quality in Korean coastal waters during April 2007. Specifically we compared two methods based on an artificial substrate (glass slide): the polyurethane foam enveloped slide (PFES) and the conventional slide (CS) systems. The results demonstrated that: (1) the colonization patterns of the ciliate communities at all taxonomic levels showed a lower variability in the PFES system than those of the CS system; (2) The taxonomic diversity (Δ) and taxonomic distinctness (Δ*) were significantly higher in the PFES system than those in the CS system; and (3) all four taxonomic diversity/distinctness indices represented lower variability in the PFES system than those of the CS samples. These findings suggest that the PFES system is more effective than the CS system for measuring the colonization patterns and taxonomic distinctness parameters that are increasingly used as potential indicators of water quality. This conclusion supports our previous suggestion that the PFES system is a better tool than the CS system for monitoring water quality in the marine ecosystem, using periphytic ciliates.

scholarly journals The taxonomic diversity of mycobiota in the coastal waters of Crimea (the Black Sea)

2016 ◽  
Vol 1 (2) ◽  
pp. 27-38
Author(s):  
N. I. Kopytina ◽  
I. A. Dudka
Keyword(s):  
Black Sea ◽  
Bottom Sediments ◽  
Coastal Waters ◽  
Taxonomic Diversity ◽  
Fungal Species ◽  
The Black Sea ◽  
Taxonomic Distinctness ◽  
Distinctive Features ◽  
New Information ◽  
Water Bottom

New information about fungi distribution, change of genera names and change of the systematic attribution of some species determine the necessity of revision of the Crimean coastal waters mycobiota. The purpose of this work is to conduct a revision of fungi names synonymy, to reveal specific richness, to give quantitative evaluation and to perform comparative analysis of the taxonomic diversity of mycobiota of different regions and biotopes in the Black Sea sector of the Crimean coastal waters and west khalistaza on the base of literature and our own data. The following biotopes have been studied: water, bottom sediments, algae, integument of invertebrates, dolphins’ skin, Zostera marina and wood. The taxonomic list of marine mycobiota included 275 species from 105 genera, 40 families, 26 orders, 15 classes, 5 phylum. The number of species in areas has changed from 19 (6.9 % of composition) in west khalistaza to 147 (53.4 %) in Kazach’ya Bay, in biotopes – from 17 (6.2 %) on the skin of dolphins to 157 (57.1 %) in bottom sediments. The valuation of fungal species variety was made with the usage of Taxonomic Distinctness Indices TaxDI (Δ+ and Λ+). The complexity of the minimum taxonomic diversity (Δ+ = 66.4) was identified in the west khalistaza, the maximum – in the Sevastopol’skaya Bay (Δ+ = 80.2). The minimum value of the index (Δ+ = 70.0) was identified in the fragments of wood, the maximum (Δ+ = 86.2) – on invertebrates. The less taxonomic variety was revealed in the complexes, in which the basis of the composition (81.8–89.5 % in areas and 76.5–87.1 % in biotopes) was presented by polyspecies branches of mycobiota from the “leading” families and genera. The number of examined biotopes has determined the distinctive features of the hierarchic diversity of mycobiota. The obligate aquatic fungi isolated from invertebrates and from fragments of wood has affected the structure of fungal complexes. Maximal similarity of mycocomplexes at all taxonomical levels was registered in Kazach’ya and Kamyshovaya bays, minimal – in mycocomplexes of west khalistaza and Sevastopol’skaya Bay. The greatest similarity of structure was registered in biotopes of water and bottom sediments, the smallest – in biotopes of water and wood.

Management and Status of Japanese Public Waters

1991 ◽  
Vol 23 (1-3) ◽  
pp. 1-10 ◽  
Author(s):  
Takeshi Goda
Keyword(s):  
Water Quality ◽  
Coastal Waters ◽  
Industrial Wastewater ◽  
Quality Standards ◽  
Water Bodies ◽  
Industrial Wastewaters ◽  
Quality Of Water ◽  
Japanese Rivers ◽  
Per Capita

The management and status of public water bodies in Japan is discussed. The environmental quality standards which have been set and the levels of compliance with these standards are shown. The water quality of Japanese rivers, lakes, reservoirs, wetlands and coastal waters is described, and eutrophication problems are mentioned. The effects of changes in population density and levels of recycling of industrial wastewaters on the quality of water bodies are discussed. Almost 75% of industrial wastewater is now recycled. Per capita availability of freshwater in Japan is comparatively low, and the construction of 530 dams, in addition to the 2393 dams already in operation, is planned. Irrigation effluents from paddy fields are a major factor which influences river water quality in Japan. The improvement of water quality using various methods is discussed.

scholarly journals Ekologi Perairan Semarang – Demak : Inventarisasi Jenis Kerang yang Ditemukan di Dasar Perairan

2017 ◽  
Vol 20 (2) ◽  
pp. 84
Author(s):  
Chrisna Adhi Suryono ◽  
Ita Riniatsih ◽  
Ria Azizah ◽  
Ali Djunaedi ◽  
Baskoro Rochaddi ◽  
...  
Keyword(s):  
Water Quality ◽  
Coastal Waters ◽  
Bottom Trawl ◽  
Anadara Granosa

The present study was conducted to inventory the cockles (bivalve) in coastal waters between Semarang to Demak.  The samples were collected by bottom trawl modification (dragger) around those areas.  The results were found ten various cockles there were Anadara granosa, A. pilula, A. gubernaculum, A. inaequivalvis, Pharella javanica, Paphia undulate, Marcia hiantina, Harvella plicataria, Mactra violacea, and Placuna placenta.  Meanwhile the waters quality in the in this areas still support to organisms to survive based on the standard water quality from Indonesian Ministry of Environmental.  Abstrak Tujuan penelitian ini adalah untuk menginventarisasi jenis jenis kerang yang ada di perairan antara Semarang dan Demak.  Sampel diambil dengan trawl dasar modivikasi (dragger) sekitar perairan tersebut.  Hasil penelitian menunjukakan beberapa jenis kerang didapat seperti: Anadara granosa, A. pilula, A. gubernaculum, A. inaequivalvis, Pharella javanica, Paphia undulate, Marcia hiantina, Harvella plicataria, Mactra violacea, and Placuna placenta. Berdasar Kepmen Lingkungan Hidup kualitas perairan yang ada di daerah tersebut dapat dikatakan masih mendukung untuk kehidupan organisme.

scholarly journals Quorum Sensing Regulates the Hydrolytic Enzyme Production and Community Composition of Heterotrophic Bacteria in Coastal Waters

2021 ◽  
Vol 12 ◽  
Author(s):  
Marion Urvoy ◽  
Raphaël Lami ◽  
Catherine Dreanno ◽  
Daniel Delmas ◽  
Stéphane L’Helguen ◽  
...  
Keyword(s):  
Quorum Sensing ◽  
Community Composition ◽  
Coastal Waters ◽  
Bacterial Communities ◽  
Heterotrophic Bacteria ◽  
Bacterial Community Composition ◽  
Marine Ecosystem ◽  
Hydrolytic Enzyme ◽  
Enzymatic Activities ◽  
Hydrolytic Activities

Heterotrophic microbial communities play a central role in biogeochemical cycles in the ocean by degrading organic matter through the synthesis of extracellular hydrolytic enzymes. Their hydrolysis rates result from the community’s genomic potential and the differential expression of this genomic potential. Cell-cell communication pathways such as quorum sensing (QS) could impact both aspects and, consequently, structure marine ecosystem functioning. However, the role of QS communications in complex natural assemblages remains largely unknown. In this study, we investigated whether N-acylhomoserine lactones (AHLs), a type of QS signal, could regulate both hydrolytic activities and the bacterial community composition (BCC) of marine planktonic assemblages. To this extent, we carried out two microcosm experiments, adding five different AHLs to bacterial communities sampled in coastal waters (during early and peak bloom) and monitoring their impact on enzymatic activities and diversity over 48 h. Several specific enzymatic activities were impacted during both experiments, as early as 6 h after the AHL amendments. The BCC was also significantly impacted by the treatments after 48 h, and correlated with the expression of the hydrolytic activities, suggesting that changes in hydrolytic intensities may drive changes in BCC. Overall, our results suggest that QS communication could participate in structuring both the function and diversity of marine bacterial communities.

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