Benthic marine diatom deformities associated with contaminated sediments in Hong Kong

Dickman, Mike

doi:10.1016/s0160-4120(98)00060-9

Cited by 50 publications

(36 citation statements)

References 14 publications

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“…These concern mainly Fragilaria capucina and Diatoma vulgaris species. The abundance of such abnormal forms has been attributed to heavy metal concentrations by several authors (Dickman, 1998;Gold et al, 2003b;Go´mez & Licursi, 2003), and is taken into account by the IPS index and will be used by further indices for a better assessment of water quality, even if metallic concentrations are not actually so important in the area studied here.…”

Section: Discussionmentioning

confidence: 99%

Impact of Urban Pollution from the Hanoi Area on Benthic Diatom Communities Collected from the Red, Nhue and Tolich Rivers (Vietnam)

et al. 2006

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The effects of urban pollution from Hanoi city on the benthic diatom communities of the Nhue-Tolich river system were studied during the 2003 dry season. Benthic diatoms were allowed to grow on glass slides suspended in the water flow for 4 weeks. To reveal the relationship between water quality and diatom communities, Canonical correspondence analysis (CCA) was used on data concerning relative abundances of diatom species and environmental variables. Two diatom indices, IPS and DAIpo, were applied to evaluate water quality in the three rivers. A total of 291 diatom taxa were found in the Red, Nhue and Tolich Rivers. These were mainly cosmopolitan taxa, with some tropical, subtropical and endemic taxa. The most abundant taxa at the Red site were Aulacoseira granulata, Achnanthidium minutissimum, Encyonema minutum, Navicula recens and other halophilous taxa such as Nitzschia kurzii, Seminavis strigosa, Entomoneis paludosa, Bacillaria paradoxa. Diatom assemblages at the Tolich site consisted mainly of Nitzschia umbonata, Nitzschia palea and Eolimna minima. Diatom density ranged from 660 to 30,000 cells/cm 2 . Environmental variables and diatom assemblage composition at all sites were significantly correlated. Two diatom indices gave similar results and indicate the Tolich River with the lowest values as a highly polluted site.

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Section: Discussionmentioning

confidence: 99%

Impact of Urban Pollution from the Hanoi Area on Benthic Diatom Communities Collected from the Red, Nhue and Tolich Rivers (Vietnam)

et al. 2006

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“…In case studies in Hong Kong and Hungary more deformed species with teratological frustules were found close to heavymetal polluted sources (Dickman, 1998;Szabó et al, 2005).…”

Section: Diatom Deformitiesmentioning

confidence: 96%

“…6 A to C. Deformities in frustules of diatoms are generally ascribed to silicon limitation, heavy metals and extreme pH (Ruggiu et al, 1998;Dickman, 1998). Referring to water quality data in Table 3, pH may be ruled out as a contributing factor to the deformities as the values were within TWQRs as set out by DWAF (1996).…”

Section: Diatom Deformitiesmentioning

confidence: 99%

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The influence of land use on water quality and diatom community structures in urban and agriculturally stressed rivers

Walsh¹,

Wepener²

2009

WSA

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Epilithic diatom communities offer a holistic and integrated approach for assessing water quality as they remain in one place for a number of months and reflect an ecological memory of water quality over a period of time. The objective of this study is to use diatom assemblages to distinguish between particular land types and associated water quality impacts that are linked to these land-use patterns. Water quality and diatom community data were collected from sites in the Crocodile and Magalies Rivers (Gauteng and North West Province, South Africa) associated with agricultural, urban and natural (reference) adjacent land use respectively. The data collected were subjected to multivariate statistical techniques to analyse spatial and temporal patterns in water quality (principal component analysis) and diatom community structures (non-metric multidimensional scaling) to elucidate hypothesised differences in community structure per land-use type. Five diatom response indices (Generic Diatom Index, Specific Pollution Sensitivity Index, Biological Diatom Index, Eutrophication/Pollution Index and Percentage Pollution Tolerant Valves) incorporated in the OMNIDIA software were implemented to assess the integrity of diatom communities per land-use type. Principle component ordination of water quality describes 56.6% of the variation in data observed, and indicates the separation of reference sites from test sites for low and high flow conditions combined. It was, however, not possible to distinguish between the agricultural and urban land-use sites using PCA based on water quality data. One-way ANOSIM showed a significant difference (p < 0.05) between reference groups, agricultural groups and urban groups, with no significant differences noted ( p > 0.05) between groups made up of sites exhibiting the same land-use patterns. Diatom indices showed that agricultural sites were in a slightly more modified ecological state than urban sites overall. Based on the species similarity (SIMPER analyses), reference sites showed strong associations with Achnanthes minutissima, Gomphonema venusta and Cocconeis placentula var. euglypta, whilst urban sites were associated with Diatoma vulgaris, Navicula tripunctata and Amphora pediculus. Agriculture could be separated into high-and low-intensity practices based on species composition. Sites where high-intensity agriculture took place were dominated by motile species of the genus Nitzschia, and low-intensity agriculture was indicated by motile species of the genus Navicula. Urban sites contained a combination of species that were tolerant of spikes in water quality.

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“…Other factors that are teratogenic, and may be pathogenic, include high temperatures and salinities (Estes, Dute 1994;Håkansson 1999), low current velocity (typical of summer drought conditions), and subsequent increased light intensity and raised water temperatures (Antoine, Benson-Evans 1984), high UV radiation (Cabrol et al 2004), increase in nutrient concentrations (Kling 1993;Estes, Dute 1994) and high concentrations of heavy metals, e.g. copper (Dickman 1998;Ruggiu et al 1998;Cattaneo et al 2002;Fore, Grafe 2002;Cooper et al 2003), and cadmium, nickel, zinc, chromium and lead (Dickman 1998). Previous reports attempting to utilise teratological diatoms in assessing water pollutant loading have been undertaken by Lai, Chen (1998), Ruggiu et al (1998) and Cattaneo et al (2002).…”

Section: Introductionmentioning

confidence: 99%

Teratological forms of diatoms (Bacillariophyceae) as indicators of water pollution in the western part of Puck Bay (southern Baltic Sea)

Dziengo-Czaja

Koss

Matuszak

2008

Oceanological and Hydrobiological Studies

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Studies of benthic diatom communities in the surface sediments of the Swarzewo area of Puck Bay were carried out during 1998 and 1999 in order to assess water quality, and in particular the organic load. Among the 192 taxa identified, teratological forms of diatoms were recorded in 17 diatom species, primarily in the species Opephora mutabilis, Planothidium delicatulum and Fragilaria fasciculata. The number of teratological forms was significantly higher in sediments rich in organic matter, which had concurrent high concentrations of phosphorus and nitrite nitrogen compounds. The highest teratological diatom abundances were recorded in α-mesosaprobic conditions, especially during spring and summer. It is postulated that teratological diatom valves are indicative of poor water quality.

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Benthic marine diatom deformities associated with contaminated sediments in Hong Kong

Cited by 50 publications

References 14 publications

Impact of Urban Pollution from the Hanoi Area on Benthic Diatom Communities Collected from the Red, Nhue and Tolich Rivers (Vietnam)

Impact of Urban Pollution from the Hanoi Area on Benthic Diatom Communities Collected from the Red, Nhue and Tolich Rivers (Vietnam)

The influence of land use on water quality and diatom community structures in urban and agriculturally stressed rivers

Teratological forms of diatoms (Bacillariophyceae) as indicators of water pollution in the western part of Puck Bay (southern Baltic Sea)

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