scholarly journals Multivariate approach to determine the ecological preferences of phytoplankton in Uppanar estuary, southeast coast of India

2021 ◽  
Vol 7 (10) ◽  
pp. 23-33
Author(s):  
P. Damotharan and R. Punniyamoorthy M. Saravanakumar, P. Murugesan,
Keyword(s):  
River Mouth ◽  
Environmental Parameters ◽  
Species Number ◽  
Phytoplankton Species ◽  
Phytoplankton Diversity ◽  
Blue Green Algae ◽  
Phytoplankton Distribution ◽  
Physico Chemical ◽  
Environmental Matching ◽  
Water Ph

In the present study, the phytoplankton diversity and distribution was studied in relation seasonal variation of environmental parameters in the Uppanar estuary. Samples were seasonally collected (i.e., pre-monsoon: July-2018 and summer: June-2019) from six stations. A total of 62 phytoplankton species belonging to three classes, 20 orders, 26 families and 36 genera were and among the three phytoplankton taxa, diatoms topped the list with 41 species followed by Dinoflagellates (17 species) and blue green algae (4 species). The maximum number of phytoplankton species (36) and diversity value (H’) 3.976 was recorded in the stations near river mouth (UE-6) during summer and minimum species number (21) and maximum species richness (d) 6.923 was recorded in stations close to industrialr zone (UE-1) during monsoon. The maximum species evenness (J') 0.928 was recorded at stations near river mouth (UE-6). BIO-ENV (Biota-Environmental matching) and CCA results confirmed that the environmental parameters such as Dissolved oxygen, Turbidity, Salinity, Water pH, Chlorophyll, Silicate, TN and TP as best match (ρω = 0.968) in determining phytoplankton distributions. The results of present study helps to develop an understanding on the phytoplankton distribution based on physico-chemical parameters, which will form a reliable tool in bio-monitoring studies.

scholarly journals Seasonal Composition and Diversity of Zooplankton in Pichavaram Mangrove Forest, Southeast Coast of India

2021 ◽  
Vol 7 (09) ◽  
pp. 60-70
Author(s):  
and R. Punniyamoorthy M. Saravanakumar, P. Murugesan, P. Damotharan
Keyword(s):  
Mangrove Forest ◽  
River Mouth ◽  
Environmental Parameters ◽  
Species Number ◽  
Total Biomass ◽  
Mangrove Forests ◽  
Zooplankton Species ◽  
Dominant Group ◽  
Environmental Matching ◽  
Bio Monitoring

In the present study, the zooplankton diversity and distribution was studied in relation to seasonal variation of environmental parameters in the Pichavaram mangrove forest. Samples were seasonally collected (i.e., post-monsoon: January-2018 and monsoon: December-2018) from seven stations. A total of 48 zooplankton species belonging to two groups macro-zooplankton and micro-zooplankton were recorded during this study. A total of 48 species of zooplankton belonging to different groups were identified. Copepod was found to be the most dominant group and it contributed more than 50% of the total zooplankton collected in this study. The maximum number of zooplankton species (35) and diversity value (H’) 3.867 was recorded in the stations near coastal zone (P-7) during summer and minimum species number (24) and maximum species richness (d) 7.652 was recorded in stations near to freshwater zone (P-2) during monsoon. The species evenness (J') 0.866 was also recorded maximum at stations near river mouth (P-7). BIO-ENV (Biota-Environmental matching) and CCA results confirmed that the environmental parameters such as Temperature, Salinity, Dissolved Oxygen, Silicate, Chlorophyll, Primary Productivity, Total Biomass and Phaeopigments as the most influencing environmental parameters, which regulates zooplankton assemblage. The results of present study help to develop an understanding on the zooplankton distribution in mangrove forests, which will form a reliable tool in bio-monitoring studies

scholarly journals Studi Struktur Komunitas Fitoplankton Di Danau Batur, Kecamatan Kintamani, Kabupaten Bangli, Provinsi Bali

GEMA AGRO ◽  
2018 ◽  
Vol 23 (1) ◽  
pp. 104
Author(s):  
Komang Gustika Nirasari ◽  
I Wayan Arya ◽  
Sang Ayu Made Putri Suryani
Keyword(s):  
Diversity Index ◽  
Environmental Parameters ◽  
Eutrophic Lake ◽  
Phytoplankton Species ◽  
Chemical Parameters ◽  
Phytoplankton Abundance ◽  
Dominance Index ◽  
Phytoplankton Diversity ◽  
Key Factor ◽  
Physical And Chemical

Lake Batur is the largest lake in Bali with many activities surrounding that will have great impact on fertility of the lake. One key factor in the fertility of the lake is phytoplankton. Abundance of phytoplankton in the waters affected by several environmental parameters. This research was conducted at Lake Batur, Kintamani district, Bangli Regency, in February 2014. Study is to measure the composition, abundance, diversity, uniformity and dominance of phytoplankton in the waters, measuring parameters and aquatic physical chemistry. The diversity of phytoplankton species found in Lake Batur are 5 class consists of 20 genera. Phytoplankton abundance ranged from 232370-336325 ind/l are eutrophic lake. Phytoplankton diversity index were included in diversity, uniformity index is included in the low uniformity, dominance index showed no dominance. Physical and chemical parameters of water still shows a good value so that the waters of Lake Batur contamination has not occurred.

Nutrients and phytoplankton in three shallow, freshwater lakes of different tropic status in Western Australia

1981 ◽  
Vol 32 (4) ◽  
pp. 541 ◽  
Author(s):  
DM Gordon ◽  
CM Finlayson ◽  
AJ McComb
Keyword(s):  
Green Algae ◽  
Western Australia ◽  
Organic Phosphorus ◽  
Environmental Parameters ◽  
Strongly Correlated ◽  
Freshwater Lakes ◽  
Nitrogen And Phosphorus ◽  
Water Conductivity ◽  
Blue Green Algae ◽  
Nitrogen Concentrations

The trophic status of three shallow, freshwater lakes on the Swan coastal plain near Perth, Western Australia, was assessed from February 1975 to January 1976. Loch McNess is in a National Park, Lake Joondalup is in an area becoming urbanized, and Lake Monger is in a suburb near the centre of Perth. Monthly measurements were made of phytoplankton numbers and environmental parameters, including forms of nitrogen and phosphorus. Populations tended to be high when lake levels were low. Phytoplankton numbers were dominated by blue-green 'algae' in summer in each lake, with the lowest numbers in Loch McNess. Green algae were most prominent in autumn and winter. Diatoms were present at relatively lower numbers throughout the year. Phytoplankton numbers were strongly correlated with phosphorus levels, particularly for blue-green algae, and less so with nitrogen. Green algae were also strongly correlated with water conductivity. Nearly 80% of variance in phytoplankton numbers was accounted for in multiple linear regression by temperature, sunlight hours, depth, pH, conductivity and phosphate, organic phosphorus, ammonia, nitrate-nitrite, and organic nitrogen concentrations. Much of the variance was accounted for by the nutrients alone. Comparisons with data in the literature suggest that Lakes Joondalup and Monger are eutrophic by world standards, and are far more eutrophic than Loch McNess.

scholarly journals Microphytoplankton structure from the neritic and oceanic regions of Pernambuco State - Brazil

2009 ◽  
Vol 69 (4) ◽  
pp. 1037-1046 ◽  
Author(s):  
ML. Koening ◽  
BE. Wanderley ◽  
SJ. Macedo
Keyword(s):  
Principal Component ◽  
Mesh Size ◽  
Species Number ◽  
Phytoplankton Diversity ◽  
Trichodesmium Erythraeum ◽  
Species Association ◽  
Tropical Water ◽  
Key Species ◽  
Distribution And Ecology ◽  
Planktonic Species

This research was carried out to assess phytoplankton diversity, distribution and ecology on the Pernambuco Continental Shelf and Oceanic region (lat. 7º 33' 00" S to 8º 41' 50" S and long. 34º 04' 47" W to 35º 01' 20" W). Samples were collected during the Joint Oceanographics Projects (JOPS II-Leg 5) by double oblique hauls with a baby bongo net 64 µm mesh size at depth between 14 and 150 m in inshore and offshore waters respectively, in seven transects, totaling 34 stations. The temperature and salinity characterised the tropical water masses. The dissolved oxygen was oversaturated in all stations. The nutrient-low concentrations showed an oligothrophic pattern in the whole area. 173 specific and infraspecific taxa were identified: Dinophyta (103 taxa), Bacillariophyta (61 taxa), Cyanobacteria (7 taxa), Chlorophyta and Chrysophyta (1 taxon). The family Ceratiaceae presented the highest species number (47 taxa). The cyanobacteria Trichodesmium erythraeum Ehrenberg, Oscillatoria spp. and the diatom Leptocylindrus danicus Cleve had higher frequence of occurrence and abundance. Species diversity varied from 0.71 to 3.46 bits.cell-1 and this low index was due to Trichodesmium erythraeum bloom and evenness from 0.14 to 0.65, showing an unstable pattern. The oceanic planktonic species were responsible for the higher richness with 78 taxa, corresponding to 58.39% of the total microphytoplankton. The species association presented two groups. The first one divided in two subgroups: one associated to the neritic/oceanic and oceanic planktonic species and the other to the oligotrophic indicator species. The second group was composed of some key species which were the most abundant and frequent in the area. The first three Principal Component Analyses (PCAs) explained 50.91% of the data variance showing that the area is structured by two groups: one offshore composed by oligotrophic indicators, and another nearshore influenced by continental fluxes.

scholarly journals Interstellar and interplanetary solids in the laboratory

2015 ◽  
Vol 11 (A29B) ◽  
pp. 416-419 ◽  
Author(s):  
Emmanuel Dartois ◽  
Ivan Alata ◽  
Cécile Engrand ◽  
Rosario Brunetto ◽  
Jean Duprat ◽  
...  
Keyword(s):  
Interstellar Medium ◽  
Environmental Parameters ◽  
Interstellar Matter ◽  
Additional Information ◽  
Set Constraints ◽  
Physico Chemical ◽  
Space Environments ◽  
Chemical Conditions ◽  
Extraterrestrial Material ◽  
Shed Light

AbstractThe composition of interstellar matter is driven by environmental parameters and results from extreme interstellar medium physico-chemical conditions. Astrochemists must rely on remote observations to monitor and analyze the interstellar solids composition. They bring additional information from the study of analogues produced in the laboratory, placed in simulated space environments. Planetologists and cosmochemists access and spectroscopically examine collected extraterrestrial material in the laboratory. Diffuse interstellar medium and molecular clouds observations set constraints on the composition of organic solids that can then be compared with collected extraterrestrial materials analyses, to shed light on their possible links.

Role of single-celled organisms in mucilage formation on the shores of Büyükada Island (the Marmara Sea)

2010 ◽  
Vol 91 (4) ◽  
pp. 771-781 ◽  
Author(s):  
Neslıhan Balkis ◽  
Hakan Atabay ◽  
Irfan Türetgen ◽  
Serhat Albayrak ◽  
Hüsamettın Balkis ◽  
...  
Keyword(s):  
Membrane Filtration ◽  
Skeletonema Costatum ◽  
Seawater Temperature ◽  
Sampling Period ◽  
N:P Ratio ◽  
Cell Number ◽  
Species Number ◽  
Sampling Point ◽  
Marmara Sea ◽  
Phytoplankton Species

This study was implemented to determine the environmental factors and causative organisms of the recent mucilage formation in the Marmara Sea. Samples were taken during the study from 7 different depths (0.5–30 m) of one sampling point of the Büyükada Island shore between January and June 2008. As a result, 62 phytoplankton species belonging to 5 different groups were identified. Dinoflagellates were dominant in terms of species number, and diatoms in terms of cell number. In January and February, mucilage formation was very dense, where 5 phytoplankton species (Clindrotheca closterium, Pseudo-nitzschiasp.,Skeletonema costatum, Thalassiosira rotula(Bacillariophyceae) andGonyaulax fragilis(Dinophyceae)) were reported as dominant organisms. Among them,Gonyaulax fragilishas never been reported in the Marmara Sea previously, thus that organism appeared firstly with the formation of dense mucilage and then when the mucilage decayed in May and June 2008,G. fragilisdisappeared. Autofluorescent single-celled organisms were classified in three groups depending on their cell sizes (>20 μm, >2 μm, >0.2 μm) by membrane filtration and total count of bacteria were determined by epifluorescence microscope after dying with DAPI. The highest total bacteria was recorded in April at 25 m depth (6655 ± 44.4 cells ml−1) while the lowest count was in June at 0.5 m depth (1077 ± 26.1 cells ml−1). The seawater temperature ranged between 7.0 and 21.5°C, salinity between 20.9 and 37.4 ppt and dissolved oxygen amount between 2.75 and 12.75 mg l−1. The chlorophyll-aamount ranged between 0.10 and 6.35 μg l−1, the higher values were recorded in January at 15 m depth (6.35 μg l−1) and in April at 10 m depth (4.89 μg l−1). Among the nutrients, the amounts of nitrite + nitrate-N varied between 0.02 and 7.67 μg-at N l−1, phosphate-P between 0.11 and 0.96 μg-at P l−1and silicate-Si between 0.37 and 8.93 μg-at Si l−1. The highest values were determined at a deeper layer where nutrients are accumulated. On the other hand, the N:P ratio interval was found as 0.1–11.3, Si:P ratio as 2.92–52.33 and N:Si ratio as 0.01–1.10 during the sampling period. Nitrogen was the limiting nutrient and the silica amount was enough to enable the development of diatoms.

scholarly journals Global pattern of phytoplankton diversity driven by temperature and environmental variability

2019 ◽  
Vol 5 (5) ◽  
pp. eaau6253 ◽  
Author(s):  
Damiano Righetti ◽  
Meike Vogt ◽  
Nicolas Gruber ◽  
Achilleas Psomas ◽  
Niklaus E. Zimmermann
Keyword(s):  
Species Richness ◽  
Environmental Variability ◽  
Species Turnover ◽  
Marine Phytoplankton ◽  
Marine Biodiversity ◽  
Phytoplankton Species ◽  
Global Pattern ◽  
Phytoplankton Diversity ◽  
Biogeographic Patterns ◽  
Theoretical Predictions

Despite their importance to ocean productivity, global patterns of marine phytoplankton diversity remain poorly characterized. Although temperature is considered a key driver of general marine biodiversity, its specific role in phytoplankton diversity has remained unclear. We determined monthly phytoplankton species richness by using niche modeling and >540,000 global phytoplankton observations to predict biogeographic patterns of 536 phytoplankton species. Consistent with metabolic theory, phytoplankton richness in the tropics is about three times that in higher latitudes, with temperature being the most important driver. However, below 19°C, richness is lower than expected, with ~8°– 14°C waters (~35° to 60° latitude) showing the greatest divergence from theoretical predictions. Regions of reduced richness are characterized by maximal species turnover and environmental variability, suggesting that the latter reduces species richness directly, or through enhancing competitive exclusion. The nonmonotonic relationship between phytoplankton richness and temperature suggests unanticipated complexity in responses of marine biodiversity to ocean warming.

scholarly journals Phytoplankton from Vam Co River in Southern Vietnam

2016 ◽  
Vol 5 (1) ◽  
pp. 113
Author(s):  
Thanh-Son Dao ◽  
Thi-Nhu-Phuong Bui
Keyword(s):  
Water Quality ◽  
Green Algae ◽  
Quality Evaluation ◽  
Nitrate Concentration ◽  
Inorganic Nitrogen ◽  
Environmental Parameters ◽  
Water Quality Assessment ◽  
Species Number ◽  
Dissolved Phosphorus ◽  
Southern Vietnam

<p class="emsd"><span lang="EN-GB">In this study we investigated the variation of phytoplankton and the water quality in Vam Co River, Southern Vietnam. Phytoplankton were bi-monthly monitored in 2011 at 12 sampling sites in the river. Some basic environmental parameters were also monitored including temperature, pH, turbidity, inorganic nitrogen and dissolved phosphorus. The phytoplankton biodiversity and Diatomeae indices were applied for environmental quality evaluation. The results showed that temperature </span><span lang="EN-GB">ranged from 28.7 – 31.9 </span><span lang="EN-GB">°C during the monitoring. The pH and turbidity were in between 3.9 – 7.0 and 2 – 64 NTU, respectively. The nitrate and ammonium concentrations were from 0.06 – 1.21 and 0.03 – 1.15 mg/L, respectively. The phosphate concentration was between 0.02 and 0.37 mg/L. </span><span lang="EN-GB">The environmental parameters were favorable for phytoplankton development. The phytoplankton analyses showed that there were 290 species of diatoms, green algae, golden algae, yellow algae, euglenoids, dinoflagellates and cyanobacteria of which green algae and diatoms were dominant in species number. </span><span lang="EN-GB">Phytoplankton density ranged from 920 – 383 600 individuals/L with the main dominant species of diatoms. The biodiversity index values during the monitoring were from 0.15 – 3.80 characterized for oligotrophic to eutrophic conditions whereas the Diatomeae index values were more than 0.2 indicating for the eutrophic characteristic of the aquatic environment. Besides, phytoplankton species number positively correlated with temperature but negatively correlated with nitrate concentration. Additionally, the biodiversity positively correlated with temperature and species number, but negatively correlated with nitrate and phytoplankton abundance. The results confirmed the advantage of using phytoplankton and their indices for environmental monitoring and water quality assessment.</span></p><p> </p>

scholarly journals Application of Inorganic Fertilizers and Organic Manures on the Production of Autotrophic Plankton in Madhupur Tract Soil Contained Miniature Tank

2017 ◽  
Vol 10 (1) ◽  
pp. 9-14
Author(s):  
ME Huda ◽  
MR Nabi
Keyword(s):  
Drinking Water ◽  
Physicochemical Parameters ◽  
Water Hardness ◽  
Chemical Parameters ◽  
Average Water Temperature ◽  
Organic Manures ◽  
Physico Chemical ◽  
Water Ph ◽  
Average Water ◽  
Domestic Use

Appropriate fertilizer and their impact on physico-chemical parameters of water and productivity is very important for aquaculture and ecology. Optimum fertilizer dose can help in fish farmer as well as aquaculture sector. From the study it was found that the total physicochemical parameters of water were suitable for aquaculture, drinking water, irrigation and domestic use. The average water temperature was 26.45±2.75oC; 26.50±3.24oC; 25.83±4.08oC; 26.57±3.02oC and 26.53±2.93oC for MCRT-1 to 5 gradually. Water pH in an average was 7.37±0.61; 7.44±0.55; 7.25±0.58; 7.33±0.54 and 7.47±0.49 for Minature Circular Research Tank (MCRT)-1 to 5 respectively. Average water DO were 6.98±1.05 mgl-1; 6.75±1.53 mgl-1; 6.90±1.64 mgl-1; 6.59±1.19mgl-1 and 6.77±1.60mgl-1 for MCRT-1 to 5 respectively. Average water hardness were 71.88 ± 20.47 mgl-1; 60.5 ±2 1.25 mgl-1; 83.38 ± 23.39 mgl-1; 59.13 ± 25.57 mgl-1 and 52.63 ± 7.92 mgl-1 for MCRT-1 to 5 gradually. Average water total phosphorus were 0.77 ± 0.18 mgl-1; 0.83 ± 0.19 mgl-1; 0.78 ± 0.21 mgl-1; 0.84 ± 0.17 mgl-1 and 0.84 ± 0.16 mgl-1 for MCRT-1 to 5 gradually. From planktonic study it was found that the highest phytoplankton and Zooplankton were in MCRT-3. Phytoplanktons were under 27 no. of genera. Their groups were Cyanophyceae, Chlorophyceae, Bacillariophyceae, Euglenophyceae and Hepatecae.Zooplankton were five major taxa and they were Protozoa, Rotifera, Cladocera, Copepod and Ostracoda respectively.J. Environ. Sci. & Natural Resources, 10(1): 9-14 2017

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