Seasonal and Inter-annual variability in Chemical and Biological parameters in Storm Bay, Tasmania. I. Physics, Chemistry and the Biomass of components, of the food chain

1989 ◽  
Vol 40 (1) ◽  
pp. 25 ◽  
Author(s):  
LA Clementson ◽  
GP Harris ◽  
FB Griffiths ◽  
DW Rimmer
Keyword(s):  
Food Chain ◽  
Spring Bloom ◽  
Complex Mixture ◽  
Zooplankton Biomass ◽  
Biological Parameters ◽  
Chemical Parameters ◽  
Annual Variability ◽  
Westerly Wind Stress ◽  
Detailed Picture ◽  
Complementary Study

As south-east Tasmania lies close to the subtropical convergence, the waters of the shelf regions are a complex mixture of subtropical and subantarctic water masses. Temperature, salinity and nutrient data from the waters off Maria Island have been recorded for 40 years and show considerable inter-annual variability. In a complementary study, physical, chemical and biological parameters were measured in Storm Bay over 3 years. The enlarged data base gives a detailed picture of the seasonality and inter- annual variability in south-east Tasmanian waters and the effects of such variability on the food chain. The temperature and salinity measurements show that the water in Storm Bay is strongly influenced at different times of the year by water of subtropical origin from the east and by water of subantarctic origin from the west. Satellite images and drift-card data confirm these findings. Chemical parameters (dissolved inorganic and organic nutrients) showed the expected temperate seasonal trends, but some features of the seasonal cycle differed greatly in magnitude and duration between years. Differences between the years are shown to be due to inter-annual differences in the westerly wind stress, which affects nitrate concentration. In years of strong westerlies, the phytoplankton biomass and productivity increases and the spring bloom lasts longer. In such years, zooplankton biomass increases by a factor of ten in late spring, and salps replace euphausiids as the dominant organisms.

A Stochastic Hierarchical Population System: Excitement, Extinction and Transition to Chaos

2021 ◽  
Vol 31 (14) ◽  
Author(s):  
Irina Bashkirtseva ◽  
Tatyana Perevalova ◽  
Lev Ryashko
Keyword(s):  
Mathematical Modeling ◽  
Food Chain ◽  
Analytical Method ◽  
Three Dimensional ◽  
Biological Parameters ◽  
Top Predator ◽  
Population System ◽  
Modeling And Analysis ◽  
Transition To Chaos ◽  
Random Fluctuations

A problem of the mathematical modeling and analysis of noise-induced transformations of complex oscillatory regimes in hierarchical population systems is considered. As a key example, we use a three-dimensional food chain dynamical model of the interacting prey, predator, and top predator. We perform a comparative study of the impacts of random fluctuations on three key biological parameters of prey growth, predator mortality, and the top predator growth. A detailed investigation of the stochastic excitement, noise-induced transition from order to chaos, and various scenarios of extinction is carried out. Constructive abilities of the semi-analytical method of confidence domains in the analysis of the noise-induced extinction are demonstrated.

scholarly journals A comparison of the water quality between the mangrove areas Mulyorejo and Wonorejo

2018 ◽  
Vol 177 ◽  
pp. 01014
Author(s):  
Luc Kauhl ◽  
Kayleigh Lambregts ◽  
Suntoyo
Keyword(s):  
Water Quality ◽  
Local Community ◽  
East Coast ◽  
Tree Density ◽  
Biological Parameters ◽  
Chemical Parameters ◽  
Good View ◽  
Physico Chemical ◽  
Biological State

The East Coast of Surabaya consists of large mangrove and fish pond areas. These areas are crucial for the ecosystem and for providing food and shelter for the local community. If the water quality decreases the mangroves will not be able to provide these functions. The water quality of these areas can be measured in two ways: by looking at the physico-chemical parameters or by looking at the biological parameters. Both offer a very good view of what state the area is in. The purpose of this study is to find out what the differences are between the Mulyorejo and the Wonorejo areas to see what differences there are within the East Coast of Surabaya and what could be the main cause of these differences. The data shows that the physico-chemical data does not comply with the limitation factors. The main problem are the nutrients which will have to be lowered to preserve the ecosystem. In terms of the biological state of the mangrove, there are few problems found. It is, however, unclear why the tree density in one of the Wonorejo areas is declining and it should be determined what the reason for this is.

scholarly journals Study of Carrying Capacity Assesment for Natural Fisheries in Jatibarang Reservoir In Semarang City

2018 ◽  
Vol 31 ◽  
pp. 08026
Author(s):  
Bambang Sujono ◽  
Sutrisno Anggoro
Keyword(s):  
Carrying Capacity ◽  
Pollution Control ◽  
Government Regulation ◽  
Field Survey ◽  
Physical Parameters ◽  
Biological Parameters ◽  
Chemical Parameters ◽  
Chemical Parameter ◽  
Physical Chemical ◽  
The Government

Jatibarang reservoir serves as water supply in dry season and controlling flood in Semarang City. This reservoir is stem Kreo River which cathment areas of 54 km2, pool of area 110 ha and volume is 20 billion m3. This reservoir is potential to develop as natural fisheries area. The goals of this research were to explore existing condition of physical, biological as well as chemical parameter; carrying capacity assessment for natural fisheries; determining appropriate fish species to be developed in Jatibarang reservoir. This research was done in descriptive explorative scheme. Field survey and laboratory analyses were conducted to identify physical, chemical and biological parameters of the water. Physical parameters measured were temperature and water brightness. Chemical parameters measured were pH, DO, phosphate, Ammonia, nitrites and nitrate, while biological parameter measured were chlorophyll-a concentration. Carrying capacity analyses was done referred to the Government Regulation Number 82, 2001 that regulate the management of water quality and water pollution control. Based on the research, it showed that the existing condition of physical, chemical and biological parameters were still good to be used for natural fisheries. Based on TSI index, it classified as eutrofic water. Furthermore, tilapia fish (Oreochromis mossambicus), nile tilapia (Oreochromis niloticus) tawes (Barbonymus gonionotus) and carper fish (Cyprinus carpio) were considered as best species for natural fisheries in Jatibarang Reservoir.

scholarly journals Spring bloom dynamics and zooplankton biomass response on the US Northeast Continental Shelf

2015 ◽  
Vol 102 ◽  
pp. 47-61 ◽  
Author(s):  
Kevin D. Friedland ◽  
Robert T. Leaf ◽  
Joe Kane ◽  
Desiree Tommasi ◽  
Rebecca G. Asch ◽  
...  
Keyword(s):  
Continental Shelf ◽  
Spring Bloom ◽  
Zooplankton Biomass ◽  
The Us ◽  
Us Northeast

scholarly journals Mesozooplankton structure and functioning during the onset of the Kerguelen phytoplankton bloom during the KEOPS2 survey

2015 ◽  
Vol 12 (14) ◽  
pp. 4543-4563 ◽  
Author(s):  
F. Carlotti ◽  
M.-P. Jouandet ◽  
A. Nowaczyk ◽  
M. Harmelin-Vivien ◽  
D. Lefèvre ◽  
...  
Keyword(s):  
Spring Bloom ◽  
Phytoplankton Bloom ◽  
Size Structure ◽  
Early Stage ◽  
Distribution Patterns ◽  
Zooplankton Biomass ◽  
Zooplankton Abundance ◽  
Mesozooplankton Community ◽  
Remarkable Feature ◽  
Kerguelen Islands

Abstract. This paper presents results on the spatial and temporal distribution patterns of mesozooplankton in the naturally fertilized region to the east of the Kerguelen Islands (Southern Ocean) visited at early bloom stage during the KEOPS2 survey (15 October to 20 November 2011). The aim of this study was to compare the zooplankton response in contrasted environments localized over the Kerguelen Plateau in waters of the east shelf and shelf edge and in productive oceanic deep waters characterized by conditions of complex circulation and rapidly changing phytoplankton biomass. The mesozooplankton community responded to the spring bloom earlier on the plateau than in the oceanic waters, where complex mesoscale circulation stimulated initial more or less ephemeral blooms before a broader bloom extension. Taxonomic compositions showed a high degree of similarity across the whole region, and the populations initially responded to spring bloom with a large production of larval forms increasing abundances, without biomass changes. Taxonomic composition and stable isotope ratios of size-fractionated zooplankton indicated the strong domination of herbivores, and the total zooplankton biomass values over the survey presented a significant correlation with the integrated chlorophyll concentrations in the mixed layer. The biomass stocks observed at the beginning of the KEOPS2 cruise were around 1.7 g C m−2 above the plateau and 1.2 g C m−2 in oceanic waters. Zooplankton biomass in oceanic waters remained on average below 2 g C m−2 over the study period, except for one station in the Polar Front zone (F-L), whereas zooplankton biomasses were around 4 g C m−2 on the plateau at the end of the survey. The most remarkable feature during the sampling period was the stronger increase in abundance in the oceanic waters (25 × 103 to 160 × 103 ind m−2) than on the plateau (25 × 103 to 90 × 103 ind m−2). The size structure and taxonomic distribution patterns revealed a cumulative contribution of various larval stages of dominant copepods and euphausiids particularly in the oceanic waters, with clearly identifiable stages of progress during a Lagrangian time series survey. The reproduction and early stage development of dominant species were sustained by mesoscale-related initial ephemeral blooms in oceanic waters, but growth was still food-limited and zooplankton biomass stagnated. In contrast, zooplankton abundance and biomass on the shelf were both in a growing phase, at slightly different rates, due to growth under sub-optimal conditions. Combined with our observations during the KEOPS1 survey (January–February 2005), the present results deliver a consistent understanding of patterns in mesozooplankton abundance and biomass from early spring to summer in the poorly documented oceanic region east of the Kerguelen Islands.

scholarly journals Physico-chemical study of Moghat Reservoir at Khandwa, Madhya Pradesh

2013 ◽  
Vol 14 (3) ◽  
pp. 183-186
Author(s):  
Shail Joshi
Keyword(s):  
Water Quality ◽  
Water Samples ◽  
Chemical Study ◽  
Madhya Pradesh ◽  
Total Hardness ◽  
Biological Parameters ◽  
Chemical Parameters ◽  
Regular Monitoring ◽  
Physico Chemical ◽  
L Value

The present study has been carried out on Moghat Reservoir situated at Khandwa District of Madhya Pradesh. In the present study, the water samples were analyzed for various physico-chemical parameters like temperature,transparency, turbidity, TDS,  pH, Free CO2, total hardness, Ca hardness, Mg hardness, DO, BOD and COD on two different sites of the reservoir. During the course of study value of DO fluctuated between 6.04 mg/l to 8.58 mg/l. Value of BOD and COD fluctuated from 0.98 mg/l to 3.51 mg/l and 9.0mg/l to 12.3mg/l respctively. It was found that around all the parameters were more or less similar at both the sampling stations. The water quality was found suitable but it is strongly recommended that regular monitoring of the Moghat reservoir at Khandwa is very important as it is the major source of freshwater. Thus it is apparent that much attention should be paid on further studies of the physico-chemical and biological parameters of the Moghat reservoir

scholarly journals Water quality assessment based on biological and chemical analysis as a parameter for development of fresh water fishery in Lubuk Karet River of Banyuasin District

2018 ◽  
Vol 2 (2) ◽  
Author(s):  
Carli Junicef Vratama ◽  
Siti Masreah Bernas ◽  
Mohamad Amin
Keyword(s):  
Water Quality ◽  
Chemical Analysis ◽  
Quality Assessment ◽  
Ph Value ◽  
Water Quality Assessment ◽  
Nitrate Content ◽  
Biological Parameters ◽  
Phosphate Content ◽  
Chemical Parameters ◽  
Village Community

Lubuk Karet River is a river that surrounded by swamps with various kinds of plants and grasses. The Lubuk Karet River has the potential for the development of aquaculture which can be the business part of Lubuk Karet village community. This research was aimed to conduct an assessment effort in order to measure the capability of Lubuk Karet River for any aquaculture activities. The method used in this study is purposive sampling by conducting water quality assessment through biological and chemical parameters to support the development in that region. The results of this test can be a benchmark of fish species that can be cultivated in the Lubuk Karet River. The results of the chemical and biological parameters showed that the lowest DO content at station 2 was 3.11 mg/L and the highest BOD content at station 1 was 4.7 mg/L, the highest at station 1 was 606 mg/L, the highest TSS content 50 mg/L, the highest nitrate content at station 1 was 6,54 mg/L, the highest phosphate content at station 2 was 0.098 mg/L, the highest COD content at station 2 was 5,61 mg/L, Salinity was 0, the highest content at station 2 was 9,71 mg/L and the lowest pH value at station 5 was 2.96. From these results, it can be concluded that for further utilization for aquatic culture, some treatments must be conducted.

scholarly journals Characterization of Sullage Collected from Residential Building

2019 ◽  
Vol 8 (12S) ◽  
pp. 1272-1275
Keyword(s):  
Waste Water ◽  
Tamil Nadu ◽  
Residential Building ◽  
Iron Phosphate ◽  
Biological Parameters ◽  
Chemical Parameters ◽  
Kitchen Waste ◽  
Physical Chemical ◽  
Environmental Laboratory

The present study is about the analysis of sullage collected from Tiruvanchery region, Chennai, Tamil Nadu, India. Sullage is the waste water from households, sinks, bathrooms, kitchen households but except the waste water from toilets. In this project, 6 samples of waste water were collected in 3 different apartments. The apartments are Ruby Grand, Ruby Regency and Green Paradise. The 2 samples of the waste water are the kitchen waste water and washing clothes waste water. Physical, chemical and biological parameters are tested in environmental laboratory. The chemical parameters were tested using titrimetric method. It is found that all samples were safe against pH, Alkalinity, Flouride, Chloride, Iron, Phosphate, and Turbidity which are within the permissible limits of IS3306 (1974)

scholarly journals PHYSICOCHEMICAL AND BIOLOGICAL PARAMETERS OF WATER AT INDUSTRIAL SITES OF METROPOLITAN CITY OF CHENNAI, TAMIL NADU, INDIA

2020 ◽  
Vol 4 (2) ◽  
pp. 90-98
Author(s):  
Murugesan Sakthivadivel ◽  
Arunachalam Nirmala ◽  
Jeyabharathi Sakthivadivel ◽  
Rajaratnam Rajiv Mukhilan ◽  
Samuel Tennyson
Keyword(s):  
Water Samples ◽  
Tamil Nadu ◽  
Control Area ◽  
Total Alkalinity ◽  
Total Hardness ◽  
Physical Parameters ◽  
Biological Parameters ◽  
Chemical Parameters ◽  
Physical And Chemical ◽  
Red Hills

Water is essential to sustain life, and an adequate, safe and accessible supply must be available to all as improving access to safe drinking water can result in tangible benefits to health. In the present study, eighteen water samples from six different study area, viz., Red Hills, T. Nagar, Saidapet, Ashok Nagar, Alandur and Guindy of metropolitan Chennai were tested for their physicochemical and biological parameters, of which Red Hills served as control area. Results with regard to the physical parameters, showed no variation in the colour of water samples which was clear except for control as it appeared light brown. The odour of samples collected from all six study areas was observed to be constant and agreeable. The water temperature, turbidity, electrical conductivity and total dissolved solids for all six study areas ranged from 28.7 to 29.7°C, 3.7 to 11.7NTU, 723.3 to 1099.7μS/cm, and 396.7 to 805.0mg/L. The values of chemical parameters represented by pH, total hardness, total alkalinity, sulphates and flourides ranged from 7.7 to 8.0, 128.0 to 503.3mg/L, 13.3 to 50.0mg/L, 106.6 to 224.0mg/L, and 0.6 and 1.5mg/L. All the samples were found to be free from coliforms except for the control in the case of biological parameters. Overall results indicate that the physical and chemical parameters were found to be within the permissible limits set by standards and biological contamination was absent in the samples except in control which is a natural reservoir.

scholarly journals Kajian Kelayakan Sumber Air Tanah UIN Sunan Ampel Surabaya dalam Rangka Menuju Eco Campus

2019 ◽  
Vol 5 (1) ◽  
pp. 9-16
Author(s):  
Ninik Fadhillah ◽  
Muh. Ma’arif ◽  
Hanik Faizah ◽  
Latifatoel Chilmi
Keyword(s):  
Ground Water ◽  
Quality Standards ◽  
Descriptive Study ◽  
Biological Parameters ◽  
Water Pump ◽  
Chemical Parameters ◽  
Physical Chemical ◽  
Standard Construction ◽  
The Right

UIN Sunan Ampel requirements of water are fulfilled from groundwater sources. The groundwater sources of UIN Sunan Ampel are from wells where the water is taken with a water pump. The main problem related to the use of groundwater as a fulfillment of water needs is the decline of its quality. The purpose of this study is to analyze the quality of groundwater at UIN Sunan Ampel, to know the quality of groundwater in UIN Sunan Ampel reviewed by Minister of Health Regulation No. RI. 32 of 2017, Formulating the right steps in improving the quality of ground water at Sunan Ampel UIN towards ECO CAMPUS. This research is a descriptive study, in this study the quality of groundwater sources in Sunan Ampel Surabaya UIN will be described base on 3 parameters of water quality (physics, chemistry and biology). The results indicate differences in groundwater quality at UIN Sunan Ampel in terms of physical, chemical and biological parameters. The quality of groundwater sources in UIN Sunan Ampel Surabaya 95% fulfills the standard of environmental health standards and water health requirements for government sanitation hygiene requirements based on physics parameters, but it do not fulfilled the quality standards based on chemical parameters (in the form of pH) and also biology parameters. Improving the quality of ground water at UIN Sunan Ampel Surabaya is needed by improving the management system of sewers and latrines as well as standard construction of wells.

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