Ecological survey of the aquatic oligochaetes in the Lower Pearl River (People's Republic of China)

Sang, Qi; Erséus, Christer

doi:10.1007/bf00008938

Cited by 18 publications

(8 citation statements)

References 12 publications

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“…However, the density thresholds in this study may not be suitable for other cases since it is difficult to ensure the standards of different pollution states and because the impacts of organic pollutants on oligochaete community structure are not fully demonstrated or understood (Sang & Erséus, 1985). Although oligochaetes generally occur in polluted places they may be absent or minimal due to unfavorable oxygen regimes and sediments (Slepukhina, 1984), or the excessive presence of chemical pollutants such as PAHs, PCBs, and heavy metals (Prygiel et al, 2000).…”

Section: Applications Of Pollution Assessments and Biotic Indicesmentioning

confidence: 97%

“…In addition, climactic or tropic conditions may also be limiting factors for the oligochaete population density in different regions. For example, oligochaete density has been reported over 1,320,000 idv./m 2 (only L. hoffmeisteri) in the Keelung River, Northern Taiwan (Hsieh et al, 1998), at 700,000 idv./m 2 in the lower Pearl River, southern China (Sang & Erséus, 1985), but lower than 10,000 idv./m 2 in the urban watercourses of Ussurisk, Eastern Russia (Timm, 1997).…”

Section: Applications Of Pollution Assessments and Biotic Indicesmentioning

confidence: 97%

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The effect of organic pollution on the abundance and distribution of aquatic oligochaetes in an urban water basin, Taiwan

Lin

2007

Hydrobiologia

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Aquatic oligochaetes are abundant in polluted areas and are, therefore, commonly used as bioindicators to study organic pollution in rivers and streams. In order to develop a species-level oligochaete biotic index to reflect the River Pollution Index (RPI) in the Taichung Water Basin in Taiwan, we conducted a systematic sampling scheme to collect aquatic oligochaetes from the sediment samples of watercourses in the Taichung Water Basin, Taiwan. We evaluated the relationships between aquatic oligochaetes and the sewage pollution using statistical methods. The distribution of aquatic oligochaetes in relation to environmental variables, such as water quality and sediment characteristics of the regional urban contaminated streams was expressed by Canonical Correspondence Analysis (CCA). We identified 17 species of aquatic oligochaetes (Annelida, Clitellata) including 3 species of Tubificidae, 13 species of Naididae, and 1 species of Enchytraeidae from the watercourses of an urban region in the Taichung Water Basin in Taiwan, during the summer and winter of 2005 and 2006. A positive correlation was found between the total abundance of aquatic oligochaetes and the RPI (r = 0.58, P < 0.05). However, only population density of the most abundant tubificid, Limnodrilus hoffmeisteri, increased with increasing RPI values and a significantly negative correlation was found between the population density of the naidid, Nais communis, and RPI values. The results of CCA indicated that certain naidids, such as Aulophorus furcatus and Allonais gwaliorensis also tolerated extremely polluted environments in upper stream or stony habitats, implying that tubificids should not be the sole representation of simple biotic indices but should also include pollution-tolerant naidids. We found that the community structure of aquatic oligochaetes was influenced by short-term variations in microhabitat rather than according to seasonal factors in our study region. The results proved that aquatic oligochaetes were sensitive enough to provide a supplement for the regional urban pollution assessment applications for biotic indicators at the species-level

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Section: Applications Of Pollution Assessments and Biotic Indicesmentioning

confidence: 97%

Section: Applications Of Pollution Assessments and Biotic Indicesmentioning

confidence: 97%

The effect of organic pollution on the abundance and distribution of aquatic oligochaetes in an urban water basin, Taiwan

Lin

2007

Hydrobiologia

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“…Although the Zhujiang experiences tidal cycles similar to those of the South China Sea, into which it discharges, the area is, except for its lowest portion, freshwater (Table 1). Guangzhou, the largest city in southern China, and other towns within the area use the water without desalination, and for most of the year the salinity is less than 0,5%, (Qi & Ers6us, 1985). During 1988 and 1989 several specimens of a previously unknown heteronemertean were found by Q.S.…”

Section: Introductionmentioning

confidence: 99%

A new freshwater heteronemertean from the Zhujiang (Pearl River), People's Republic of China

Gibson

Sang

1991

Hydrobiologia

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“…Therefore, the classification of 'moderately polluted areas' with individuals >1000 species / m 2 in Kuwait Bay sites showed evidences to studies [6,22].…”

Section: Resultsmentioning

confidence: 70%

“…Several investigators observed metal concentrations in aquatic macro benthic organisms to be a better indicator than ambient (water) metal concentrations [2,7,11,12]. Studies revealed oligochaetes as an indicator to organic and industrial pollution [6,22]. They suggested that if benthos occurs in a density of 100-999 individuals/m 2 , the water is unpolluted; 1000-5000 individuals/m 2 , moderately polluted; and more than 5000 individuals/m 2 shows heavy pollution.…”

Section: Introductionmentioning

confidence: 99%

Validating Species Diversit Y of Benthic Organisms to Trace Metal Pollution in Kuwait Bay, Off the Arabian Gulf

-OLAYAN¹

2005

Appl Ecol Env Res

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Bu-Olayan and Thomas: Validating species diversity of benthic organisms to trace metal pollution - Abstract. Benthic organisms diversity were observed in the sequence of Annelida > Mollusca > Crustacea > "Diversa" group. Levels of trace metals in benthic organisms were in the range 0.12-96.86 µg/g during winter and 0.98-54.13 µg/g in summer. Species diversity index (H'), evenness index (J) and index of dominance (λ) were in the range 0.951-1.368 bits/unit, 0.475-0.684, and 0.19-0.33 respectively, for benthic organisms sampled in Kuwait Bay sites. Evenness index (-) was found to increase with increasing H'. Seasonally, an inverse correlation was observed between species richness (R1 and R2).Comparative studies revealed low diversity indices correspondingly to the increase in trace metal level in benthic species collected from four sites except Doha wherein high abundance of certain benthic species and high trace metal levels due to manmade perturbations were observed altering the diversity indices. Furthermore, these indices will validate benthic organisms as an indicator to trace metal pollution in Kuwait marine ecosystem.

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Ecological survey of the aquatic oligochaetes in the Lower Pearl River (People's Republic of China)

Cited by 18 publications

References 12 publications

The effect of organic pollution on the abundance and distribution of aquatic oligochaetes in an urban water basin, Taiwan

The effect of organic pollution on the abundance and distribution of aquatic oligochaetes in an urban water basin, Taiwan

A new freshwater heteronemertean from the Zhujiang (Pearl River), People's Republic of China

Validating Species Diversit Y of Benthic Organisms to Trace Metal Pollution in Kuwait Bay, Off the Arabian Gulf

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