Distribution patterns of free-living nematodes in differently degraded river reaches of the River Wien, Austria

Nematology ◽  
2009 ◽  
Vol 11 (4) ◽  
pp. 509-521 ◽  
Author(s):  
Ursula Eisendle
Keyword(s):  
Water Quality ◽  
Species Diversity ◽  
Habitat Quality ◽  
Distribution Patterns ◽  
Taxonomic Distinctness ◽  
Free Living ◽  
Percentage Contribution ◽  
The Status ◽  
Free Living Nematode ◽  
Total Fauna

AbstractFree-living nematode communities were investigated at four morphologically different reaches along the River Wien, Austria. A near natural (NN) reach, two impounded reaches of different size (small and large: SI, LI) and a restored reach (RR) were sampled in autumn, winter, spring and summer (2004-2005). A total of 4144 individuals were counted and comprised 78 species. Nematodes of the impounded sites contributed least (5% at SI) and most (60% at LI) to the total fauna. Mean site abundances (ind./10 cm2) were 68, 27, 10 and 1 at RR, NN, LI and SI, respectively. Species diversity ranged from 1.59 at LI to 2.16 at RR. Bacterivorous nematodes dominated all sites (>50%); only algivorous Chromadoridae represented a high percentage contribution (46%) at LI. Based on this high portion, the maturity index (MI 1-5) was highest at this site (2.61). The MI indicated status of good water quality for the NN (2.5). The relatively low MI (2.10) and the high portion of cp1 Secernentea (14%) reflect the status of critical pollution at the restored site. The patterns of average taxonomic distinctness (ATD) did not optimally reflect habitat quality; a better descriptor of degraded river habitats seems to be the variation of taxonomic distinctness (VTD) in this study. In conclusion, the MI seems to be a better descriptor of pollution and the VTD of morphological degradation.

scholarly journals Sebaran Kualitas Air Teluk Pamukan

2020 ◽  
Vol 16 (3) ◽  
pp. 446
Author(s):  
Sadar Husaini ◽  
Muhammad Ruslan ◽  
Mijani Rahman ◽  
Leila Aryani Sofya
Keyword(s):  
Water Quality ◽  
Palm Oil ◽  
Distribution Patterns ◽  
Fishing Ground ◽  
Sampling Location ◽  
Crude Palm Oil ◽  
Quality Scale ◽  
The Status ◽  
Loading And Unloading ◽  
Index Calculation

Teluk Pamukan is the closest fishing ground used by fishermen who live on the coast of Teluk Pamukan. Apart from fisheries, several other activities in the Teluk Pamukan area include industrial shipping or coal transportation traffic using barges, transportation of crude palm oil (CPO), and is an area for loading and unloading fertilizers and oil palm kernels by tankers. This activity has led to allegations of disturbance in the aquatic ecosystem in the form of a decrease in water quality, particularly in fishing areas. The decrease in water quality will certainly affect the status of water quality that is no longer by its designation so that it can cause social problems in the community. The purpose of this research was to identify the general characteristics of Teluk Pamukan, map the distribution patterns of water quality and the scale of water quality in Teluk Pamukan, and to analyze fishermen's perceptions of the decline in water quality. The sampling location was in the waters of Teluk Pamukan. The method used to determine the status of water quality was the Pollutant Index according to the opinion of Sumitomo and Nemerow (1970). The results obtained can be concluded that the environmental quality scale for each parameter varied from very bad to very good. However, the results of the pollutant index calculation at all stations were included in the Moderately Polluted category

Water quality status of rivers in the coastal city of Manado, North Sulawesi Province, Indonesia

2014 ◽  
pp. 8
Author(s):  
Markus T Lasut ◽  
Adianse Tarigan
Keyword(s):  
Escherichia Coli ◽  
Water Quality ◽  
Government Regulation ◽  
Organic N ◽  
Coastal City ◽  
North Sulawesi ◽  
The Status ◽  
Water Quality Status ◽  
The Government ◽  
Quality Status

A study on water quality status of three riverine systems, S. Bailang (SB), S. Maasing (SM), and S. Tondano (ST), in coastal city of Manado, North Sulawesi Province, has been conducted to measure several water quality parameters, to analyse source and quality of wastewater discharge, and to assess the status of the rivers related to the water quality. Measurement of the parameters was conducted using three indicators, i.e. organic (BOD5) and in-organic (N-NO3 and P-PO4), and pathogenic microorganism (Escherichia coli [EC] and total coliform [TC]). The result showed that the level of water quality varied between the rivers. The average level of water quality (based on the observed parameters) in SB, respectively, was 0.317 mg/l, 0.093 mg/l, 2 mg/l, >2420 MPN, and  >2420 MPN; in SM, respectively, was 0.029 mg/l, 1.859 mg/l, 17.7 mg/l, >2420 MPN, and >2420 MPN; and in ST, respectively, was 0.299 mg/l, 0.252 mg/l, 3.5 mg/l, >2420 MPN, and >2420 MPN. The level of water quality between the rivers was not significantly different (p>0.05), except based on the parameter of N-NO3 which was significantly different (p<0.01). The status of the observed rivers varied based on the classes of their water utilities (according to the Government Regulation of Indonesia, No. 82, 2001); mostly was "unsuitable". Kajian tentang status kualitas air di 3 perairan sungai di kota pesisir Manado, S. Bailang (SB), S. Maasing (SM), dan S. Tondano (ST), Provinsi Sulawesi Utara, telah dilakukan yang bertujuan untuk mengukur beberapa parameter kualitas air, menganalisis sumber dan kualitas buangan limbah domestik, dan menilai status ketiga perairan sungai tersebut. Tiga indikator digunakan, yaitu: bahan organik (BOD5), bahan anorganik (N-NO3 dan P-PO4), dan mikroorganisme patogenik (Escherichia coli [EC] dan coliform total [TC]). Hasil kajian menunjukkan bahwa tingkat kualitas air perairan tersebut berbeda-beda. Konsentrasi rerata parameter kualitas air  (BOD5, N-NO3, P-PO4, EC, dan TC) di SB, berturut-turut, sebesar 0.317 mg/l, 0.093 mg/l, 2 mg/l, >2420 MPN, dan >2420 MPN; di SM, berturut-turut, sebesar 0.029 mg/l, 1.859 mg/l, 17.7 mg/l, >2420 MPN, dan >2420 MPN; dan di ST, berturut-turut, sebesar 0.299 mg/l, 0.252 mg/l, 3.5 mg/l, >2420 MPN, dan >2420 MPN. Konsentrasi kualitas air ketiga sungai tersebut tidak berbeda secara signifikan (p>0.05), kecuali parameter N-NO3 (p<0.01). Secara umum, kondisi kualitas air ketiga sungai tersebut, menurut Peraturan Pemerintah No. 82, 2001) berada dalam status “tidak cocok” untuk peruntukannya.

scholarly journals Evaluation of Water Quality and Habitat Quality in the Beiyunhe River Watershed

2021 ◽  
Vol 638 (1) ◽  
pp. 012091
Author(s):  
Jiaxiang Zou ◽  
Shiyan Wang ◽  
Chang Liu ◽  
Zhen Han ◽  
Bei Zhu ◽  
...  
Keyword(s):  
Water Quality ◽  
Habitat Quality ◽  
River Watershed

scholarly journals Nematode Hsp90: highly conserved but functionally diverse

Parasitology ◽  
2014 ◽  
Vol 141 (9) ◽  
pp. 1203-1215 ◽  
Author(s):  
VICTORIA GILLAN ◽  
EILEEN DEVANEY
Keyword(s):  
Life Cycle ◽  
Heat Shock Protein 90 ◽  
Ecological Niches ◽  
Actual Number ◽  
Host Organism ◽  
Free Living ◽  
Parasitic Species ◽  
Free Living Nematode ◽  
Functionally Diverse

SUMMARYNematodes are amongst the most successful and abundant organisms on the planet with approximately 30 000 species described, although the actual number of species is estimated to be one million or more. Despite sharing a relatively simple and invariant body plan, there is considerable diversity within the phylum. Nematodes have evolved to colonize most ecological niches, and can be free-living or can parasitize plants or animals to the detriment of the host organism. In this review we consider the role of heat shock protein 90 (Hsp90) in the nematode life cycle. We describe studies on Hsp90 in the free-living nematode Caenorhabditis elegans and comparative work on the parasitic species Brugia pahangi, and consider whether a dependence upon Hsp90 can be exploited for the control of parasitic species.

scholarly journals Haematophagic Caenorhabditis elegans

Parasitology ◽  
2018 ◽  
Vol 146 (3) ◽  
pp. 314-320 ◽  
Author(s):  
Veeren M Chauhan ◽  
David I Pritchard
Keyword(s):  
Caenorhabditis Elegans ◽  
Neutralizing Antibodies ◽  
Fluorescent Microscopy ◽  
Free Living ◽  
C Elegans ◽  
Vaccine Responses ◽  
Nematode Parasites ◽  
Significant Difference ◽  
Free Living Nematode ◽  
Bright Emission

AbstractCaenorhabditis elegans is a free-living nematode that resides in soil and typically feeds on bacteria. We postulate that haematophagic C. elegans could provide a model to evaluate vaccine responses to intestinal proteins from hematophagous nematode parasites, such as Necator americanus. Human erythrocytes, fluorescently labelled with tetramethylrhodamine succinimidyl ester, demonstrated a stable bright emission and facilitated visualization of feeding events with fluorescent microscopy. C. elegans were observed feeding on erythrocytes and were shown to rupture red blood cells upon capture to release and ingest their contents. In addition, C. elegans survived equally on a diet of erythrocytes. There was no statistically significant difference in survival when compared with a diet of Escherichia coli OP50. The enzymes responsible for the digestion and detoxification of haem and haemoglobin, which are key components of the hookworm vaccine, were found in the C. elegans intestine. These findings support our postulate that free-living nematodes could provide a model for the assessment of neutralizing antibodies to current and future hematophagous parasite vaccine candidates.

scholarly journals Intestinal parasite analysis in organic sediments collected from a 16th-century Belgian archeological site

2005 ◽  
Vol 21 (1) ◽  
pp. 329-332 ◽  
Author(s):  
Alexandre Fernandes ◽  
Luiz Fernando Ferreira ◽  
Marcelo Luiz Carvalho Gonçalves ◽  
Françoise Bouchet ◽  
Carlos Henrique Klein ◽  
...  
Keyword(s):  
Intestinal Parasite ◽  
Parasite Burden ◽  
Northern Coast ◽  
Free Living ◽  
High Infection ◽  
Free Living Nematode ◽  
Organic Sediments ◽  
The Village ◽  
Archeological Site ◽  
Organic Remains

Parasite eggs found in organic remains collected from medieval structures in Raversijde (medieval name: Walraversijde), a village on the northern coast of Belgium, are discussed. The eggs were identified as Ascaris lumbricoides and Trichuris trichiura, both human parasites. Species identification allowed elucidating the origin of the organic sediments and the structures, in this case latrines used by humans. Capillaria sp. and free-living nematode larvae were also found in the latrine. Although neither parasite burden nor prevalence rates could be measured, the abundance of human intestinal parasite eggs indicated a high infection rate in the village residents, reflecting very poor sanitation.

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