scholarly journals Phytoplankton diversity in Digboi oil refinery effluent receiving stream of Assam, India

2018 ◽  
Vol 44 (2) ◽  
pp. 163-175
Author(s):  
Dhrubajyoti Bordoloh ◽  
PP Baruah
Keyword(s):  
Temporal Dynamics ◽  
Inorganic Phosphorus ◽  
Taxonomic Composition ◽  
Oil Refinery ◽  
Nitrate Content ◽  
Monthly Data ◽  
Phytoplankton Diversity ◽  
Refinery Effluent ◽  
Total Oil ◽  
Receiving Stream

A comprehensive study was carried out to investigate phytoplankton community and water quality in the Digboi oil refinery effluent stream. Taxonomic composition, abundance, spatial distribution, temporal dynamics of phytoplankton were studied along with physicochemical properties of water based on monthly data collected from seven selected sampling stations during April, 2011 - March, 2012. Altogether 139 species (7 orders, 19 families, 67 genera) of phytoplankton were identified of which Bacillariophyceae was the dominant class with 45 species followed by Chlorophyceae 40, Cyanophyceae 34 and Euglenophyceae 20. Though distinct changes in community structure were reported, higher phytoplankton abundance revealed during the post monsoon months. Correlation analysis showed influence of phenol and total oil content (TOC) along with pH, inorganic phosphorus and nitrate content in distribution and abundance of the phytoplankton.

scholarly journals Some Fresh Water Algae of Oil Refinery Effluent Drains of Assam, India

Our Nature ◽  
1970 ◽  
Vol 7 (1) ◽  
pp. 139-145 ◽  
Author(s):  
P.P. Baruah ◽  
B. Kakati ◽  
I. Ahmed
Keyword(s):  
Fresh Water ◽  
Algal Species ◽  
Oil Refinery ◽  
Refinery Effluent ◽  
Algal Group ◽  
Study Sites

The present paper deals with the morpho-taxonomic account of some hitherto unknown fresh water algal species of hydrocarbon polluted refinery drains of Assam. Twenty two taxa of class Chlorophyceae, Bacillariophyceae, Euglenineae and Cyanophyceae were identified from three effluent drains of Guwahati Oil Refinery. Cyanophyceae with 11 species was the dominant algal group in the study sites and Oscillatoria was the dominant genus with 8 species.Key words: Fresh water algae, Oscillatoria, oil refinery effluent, AssamDOI: 10.3126/on.v7i1.2561Our Nature (2009) 7:139-145 

Temporal dynamics in the taxonomic and functional profile of the Sphagnum-associated fungi (mycobiomes) in a Sphagnum farming field site in Northwestern Germany

2020 ◽  
Vol 96 (11) ◽  
Author(s):  
Mathilde Borg Dahl ◽  
Matthias Krebs ◽  
Martin Unterseher ◽  
Tim Urich ◽  
Greta Gaudig
Keyword(s):  
Fungal Community ◽  
Plant Pathogens ◽  
High Throughput Sequencing ◽  
Temporal Dynamics ◽  
Environmental Parameters ◽  
Taxonomic Composition ◽  
Raw Material ◽  
Negative Consequences ◽  
Field Site ◽  
Community Profile

ABSTRACT The drainage of peatlands for their agricultural use leads to huge emissions of greenhouse gases. One sustainable alternative is the cultivation of peat mosses after rewetting (‘Sphagnum farming’). Environmental parameters of such artificial systems may differ from those of natural Sphagnum ecosystems which host a rich fungal community. We studied the fungal community at a 4 ha Sphagnum farming field site in Northwestern Germany and compared it with that of natural Sphagnum ecosystems. Additionally, we asked if any fungi occur with potentially negative consequences for the commercial production and/or use of Sphagnum biomass. Samples were collected every 3 months within 1 year. High-throughput sequencing of the fungal ITS2 barcode was used to obtain a comprehensive community profile of the fungi. The dominant taxa in the fungal community of the Sphagnum farming field site were all commonly reported from natural Sphagnum ecosystems. While the taxonomic composition showed clear differences between seasons, a stable functional community profile was identified across seasons. Additionally, nutrient supply seems to affect composition of fungal community. Despite a rather high abundance of bryophyte parasites, and the occurrence of both Sphagnum-species-specific and general plant pathogens, their impact on the productivity and usage of Sphagnum biomass as raw material for growing media was considered to be low.

The Prediction of Lacustrine Phytoplankton Diversity

1981 ◽  
Vol 38 (5) ◽  
pp. 524-534 ◽  
Author(s):  
Bruce D. LaZerte ◽  
Susan Watson
Keyword(s):  
Species Richness ◽  
Community Structure ◽  
Good Predictor ◽  
Phytoplankton Biomass ◽  
Phytoplankton Community ◽  
Taxonomic Composition ◽  
Phytoplankton Community Structure ◽  
Trophic Gradient ◽  
Phytoplankton Diversity ◽  
Total Phytoplankton

We tested the hypothesis that total phytoplankton biomass can predict phytoplankton community structure independent of its taxonomic composition. From a 2-yr study on Lake Memphremagog, Quebec, which exhibits a marked axial trophic gradient, 133 samples were rarefied to uniform count sizes and a range of diversity numbers, based on proportional biomass, was calculated for each. Biomass is a good predictor of evenness (0.7 < R < 0.9), but not species richness (0.1 < R < 0.3), and this prediction is independent of changes in taxonomic composition. Species richness is more directly related to season and changes in taxonomic composition.Key words: diversity, evenness, species richness, phytoplankton

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