Suspended Matter in the Aquatic Environment

Eisma, D.

doi:10.1007/978-3-642-77722-6

Cited by 202 publications

(163 citation statements)

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“…One such concern is a decrease in water quality, which is generally reflected by increase of particulate matter in water body (Mullisset al, 1996;Webb and Walling, 1992). The composition and concentration of particulate matter in the aquatic environment is effected by the source and pathway of sediment input (Eisma, 1993;Webster et al, 1990).Results reveal that, mean turbidity value was 7.44 ± 3.8 NTU and a recorded turbidity value varies between 2.56 NTU to 23.0 NTU. Therefore, light penetration to bottom is very low.…”

Section: Visibility and Light Penetration To Lagoon Bottommentioning

confidence: 99%

STUDY THE EFFECT OF SALINITY AND NUTRIENTS FOR THE GROWTH OF Najas marina AND ITS IMPACT TO AQUATIC BIODIVERSITY IN MADU GANGA RAMSAR WETLAND IN SRI LANKA

Amarathunga

Sureshkumar

Weerasekara

et al. 2012

FESYMPO

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Madu Ganga is the latest addition to the Ramsar International Convention of Wetlands. Najas marina is an alien aquatic plant and 0.5 m long that are often branched toward the upward portion of the plant. The objective of the study was to study the impact of salinity and nutrients for the growth of Najas marina. Samples were collected for analysed water quality parameters from March, 2006 to January 2007 in the lagoon. Mapping was done using Garmin GPS map 76CS and Arc GIS used to developed maps.Mean nutrient such as, nitrate nitrogen, ammonia nitrogen and orthophosphate concentrations were observed 0.26 ± 0.3 mg/l, 0.057 ± 0.04 mg/l, and 0.354 ± 0.77 mg/l subsequently. Mean salinity variation in bottom and surface are 6.38 ± 6.65 ppt and 4.31 ± 4.68 ppt. Higher bottom salinity was observed in location number 02 (near to sea mouth) and Najas marinawas not present in the area. Najas marina was also not recorded in upper part of the lagoon and fresh water streams studied. High density of Najas marina plants were observed in sampling location 07, 08 and 09, because of the high nutrient concentration flowing through feeding tributaries. More than 25 % of lagoon area was covered by Najas marina.

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Section: Visibility and Light Penetration To Lagoon Bottommentioning

confidence: 99%

STUDY THE EFFECT OF SALINITY AND NUTRIENTS FOR THE GROWTH OF Najas marina AND ITS IMPACT TO AQUATIC BIODIVERSITY IN MADU GANGA RAMSAR WETLAND IN SRI LANKA

Amarathunga

Sureshkumar

Weerasekara

et al. 2012

FESYMPO

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“…The issue of defining 'Preliminary results of this study were presented in a seminar session on 'The role of exopolymers in natural microbial communities' at the 96th General Meeting of the American Society for Microbiology, 1996, in New Orleans, Louisiana, USA 'E-mail: neu@gm.ufz.de particulate matter in aquatic systems with respect to size and composition has been discussed in detail (Wotton 1994a). Recently, the topic 'suspended particulate matter' (SPM) has been the subject of several comprehensive books (Eisma 1993, Rao 1993, Wotton 1994b, Kausch & Michaelis 1996. Aggregates in aquatic systems have been studied in oceans and estuaries (Albright et al 1986, Simon et al 1990, Smith et al 1992, Delong et al 1993, Lampitt et al 1993, Stehr et al 1995, Zimmermann & Kausch 1996, Capone et al 1997, Holloway & Cowan 1997, Hyun et al 1997, Zimmermann 1997, in lakes (Simon 1987, Grossart & Simon 1993, Weiss et al 1996, Grossart et al 1997 and in rivers (Droppo & Ongley 1994, Hoch et al 1995, Berger et al 1996.…”

Section: Introductionmentioning

confidence: 99%

In situ cell and glycoconjugate distribution in river snow studied by confocal laser scanning microscopy

Neu¹

2000

Aquat. Microb. Ecol.

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Aggregates from the river Elbe (Germany) were collected and examined by confocal laser scanning microscopy. The river snow was directly transferred into coverslip chambers and observed without any embedding and fixation procedure. River snow samples were examined in the reflection and fluorescence mode to record mineral content and autofluorescence signals. Spatial distribution of microb~al cells within the aggregates was shown with general nucleic acid specific stains (SYTO 9, SYTO 64). The polymeric matnx of the river snow was demonstrated by using a panel of fluorescently labelled lectins. Staining with FITC and TRITC labelled lectins and simultaneous dual channel unaging showed the distribution of different types of glycoconjugates. The binding pattern observed included bacterial cell surface labelling and cloud-type labelling of extracellular polymeric substances (EPS). In addition, dual staining combined with triple-channel recording was employed to clearly separate the signal in the red channel originating from TRITC-lectin or SYTO 64 nucleic acid stain from the far red autofluorescence originating from chlorophyll-containing organisms. With this approach the fully hydrated, living, 3-dimensional architecture of aquatic aggregates was investigated. Application of lectins demonstrated the heterogeneity of the EPS matrix in between the cellular constituents of the river snow community. The chemical heterogeneity of river snow may be significant for sorption and transport of nutrients and contaminants in lotlc aquatic environments. This in situ technique may be also useful to examine interfacial microbial consortia in other habitats. Finally, it is suggested to employ in situ lectin staining to probe for the glycoconjugate distribution at the polymer level similar to in situ hybridisation with rRNA targeted oligonucleotides at the cellular level.

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“…Sur ces brèves durées, elles ont évacué respectivement 34 %, 39 % et 30 % du tonnage annuel de sédiments pour seulement 1.3 %, 5.4 % et 3.3 % des volumes annuels écoulés. (Eisma, 1993 ;Meddi, 1999 ;Meybeck, 2001 ;Pont et al, 2002 ;Antonelli, 2002) …”

Section: Importance Des Crues Dans L'exportation Des Mesunclassified

Bilan d'erosion d'un cours d'eau alpin: l'Isere a Grenoble (France)

Dumas¹

2008

zfg

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Suspended Matter in the Aquatic Environment

Cited by 202 publications

References 0 publications

STUDY THE EFFECT OF SALINITY AND NUTRIENTS FOR THE GROWTH OF Najas marina AND ITS IMPACT TO AQUATIC BIODIVERSITY IN MADU GANGA RAMSAR WETLAND IN SRI LANKA

STUDY THE EFFECT OF SALINITY AND NUTRIENTS FOR THE GROWTH OF Najas marina AND ITS IMPACT TO AQUATIC BIODIVERSITY IN MADU GANGA RAMSAR WETLAND IN SRI LANKA

In situ cell and glycoconjugate distribution in river snow studied by confocal laser scanning microscopy

Bilan d'erosion d'un cours d'eau alpin: l'Isere a Grenoble (France)

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