The document discusses phytoplankton, which are microscopic photosynthetic organisms that inhabit the pelagic zone of bodies of water. It describes the major types of phytoplankton, including diatoms and dinoflagellates. Diatoms have cell walls made of silica and come in many species-specific shapes, while dinoflagellates move with flagella and have cellulose plates. The document also discusses the ecological importance of phytoplankton in providing oxygen and as a food source, as well as negative human impacts like pollution and warming that have reduced phytoplankton populations.
Classification of marine environment pptAshish sahu
The main divisions of the marine environment. The two primary divisions of the sea are the benthic and the pelagic. The former includes all of the ocean floor, while the latter includes the whole mass of water. ... The deep-sea system is divided into an upper (archibenthic) and a lower (abyssal-benthic) zone.
Classification of marine environment pptAshish sahu
The main divisions of the marine environment. The two primary divisions of the sea are the benthic and the pelagic. The former includes all of the ocean floor, while the latter includes the whole mass of water. ... The deep-sea system is divided into an upper (archibenthic) and a lower (abyssal-benthic) zone.
Classification of plankton, Plankton diversity and Productivity.
Two groups of organisms inhabit the oceanic zone: plankton and nekton
Based on productivity, biomass, abundance and diversity, plankton far outweighs nekton in open ocean
Plankton can be classified into logical groups based on:
Taxonomy
Motility
Size
Life history
Spatial distribution
Almost all natural bodies of water bear fish life, the exceptions being very hot thermal ponds and extremely salt-alkaline lakes such as the Dead Sea and Great Salt Lake. The fishes belong to the most numerous and diversified group among vertebrates. They dominate the water bodies of the world through a variety of morphological, physiological and behavioral adaptations. They have been in existence for more than 450 million years. A total of 24618 species of fishes belonging to 482 families and 4258 genera have so far been described. About 58% of the fish species are marine while 41% are freshwater inhabitants and 1% migrants. In our Indian region alone, there are 2,500 species of which 930 are inhabitants of freshwater and the rest live in the seas. In other words, India harbours 11.5% of the fish fauna so far known in the world. There are over 800 living species of sharks and rays, 30 species of chimaeras and ratfishes, 6 species of lung fishes, 1 species of coelacanths, 36 species of long ray finned bichirs, sturgeons and paddlefishes. The Neopterygii are the rest of the known species of modem fishes. All these fishes inhabit various niches in the aquatic environment. The diversified habitats of fishes include open oceans, deep oceanic trenches, nearshore waters, saline coastal embayments, brackishwaters, estuaries, intermittent streams, tiny desert springs, vernal pools, cold mountain streams, lakes, ponds, etc.
The plankton is divisible into two main groups, the phytoplankton and the zooplankton. The primary productivity which we discussed in chapter 10 is primarily the functional aspect of phytoplankton - the other chlorophyll bearing organisms are also to be included, but in most water bodies such as the culture pond an index of primary productivity could be obtained by the mass or number of phytoplankton in a unit volume of water
In terms of biomass, the greatest migration in the world is the migration of Zooplankton .
Zooplankton migration is different because it moves up and down through the ocean's depths rather than traversing a landscape.
My master's thesis project presentation on Transcriptomics of Iron Limitation in Phaeocystis antarctica supervised by Assist. Prof. Ahmed Moustafa (who surprised me with slide 2 :)
Classification of plankton, Plankton diversity and Productivity.
Two groups of organisms inhabit the oceanic zone: plankton and nekton
Based on productivity, biomass, abundance and diversity, plankton far outweighs nekton in open ocean
Plankton can be classified into logical groups based on:
Taxonomy
Motility
Size
Life history
Spatial distribution
Almost all natural bodies of water bear fish life, the exceptions being very hot thermal ponds and extremely salt-alkaline lakes such as the Dead Sea and Great Salt Lake. The fishes belong to the most numerous and diversified group among vertebrates. They dominate the water bodies of the world through a variety of morphological, physiological and behavioral adaptations. They have been in existence for more than 450 million years. A total of 24618 species of fishes belonging to 482 families and 4258 genera have so far been described. About 58% of the fish species are marine while 41% are freshwater inhabitants and 1% migrants. In our Indian region alone, there are 2,500 species of which 930 are inhabitants of freshwater and the rest live in the seas. In other words, India harbours 11.5% of the fish fauna so far known in the world. There are over 800 living species of sharks and rays, 30 species of chimaeras and ratfishes, 6 species of lung fishes, 1 species of coelacanths, 36 species of long ray finned bichirs, sturgeons and paddlefishes. The Neopterygii are the rest of the known species of modem fishes. All these fishes inhabit various niches in the aquatic environment. The diversified habitats of fishes include open oceans, deep oceanic trenches, nearshore waters, saline coastal embayments, brackishwaters, estuaries, intermittent streams, tiny desert springs, vernal pools, cold mountain streams, lakes, ponds, etc.
The plankton is divisible into two main groups, the phytoplankton and the zooplankton. The primary productivity which we discussed in chapter 10 is primarily the functional aspect of phytoplankton - the other chlorophyll bearing organisms are also to be included, but in most water bodies such as the culture pond an index of primary productivity could be obtained by the mass or number of phytoplankton in a unit volume of water
In terms of biomass, the greatest migration in the world is the migration of Zooplankton .
Zooplankton migration is different because it moves up and down through the ocean's depths rather than traversing a landscape.
My master's thesis project presentation on Transcriptomics of Iron Limitation in Phaeocystis antarctica supervised by Assist. Prof. Ahmed Moustafa (who surprised me with slide 2 :)
Find out what has been done in the watershed to improve the water quality in Grand Lake St. Marys in this presentation given to the Lake Improvement Association by ODNR Dept. of Soil and Water's Terry Mescher and Frances Springer. Learn more at http://www.lakeimprovement.com.
Nualgi Auqculture accelerates fish growth by promoting Diatom bloom in water. Nualgi is water dispersible and consists of an alumina-modified silica sol with micronutrients adsorbed on it as nanoparticles.
Eugene Braig, Program Director, Aquatic Ecosystems at The Ohio State University College of Food, Agricultural, and Environmental Sciences shares in-depth information regarding the harmful algal blooms (HABs) on Grand Lake St. Marys. Learn more at http://www.lakeimprovement.com.
The Role of Micronutrients in Crop GrowthNualgi.org
Research on low nutrient availability to plants due to soil defficiencies in Pakistan, particularly Zinc, Boron and Iron. These mineral elements - Zn, Fe and Cu are as crucial for human health as organic compounds such as carbohydrates, fats, protein and vitamins.
This plain English fact sheet outlines the work done by the EPA in monitoring phytoplankton in Ireland's marine environment.
The EPA and the Marine Institute sample phytoplankton in estuaries and coastal waters around Ireland. They carry out sampling three times during the summer and once during winter. At each location, they take water samples just below the surface and above the seabed. They use the samples to assess how much phytoplankton is in the water and what species are present.
Phytoplankton are tiny, free-floating plants found suspended in the world’s oceans. Their name comes from Greek and means ‘plant drifter’. They are carried along by ocean currents and are usually found floating near the surface of the water. Like all plants they need sunlight to grow.
The main sources of nutrients around Ireland’s coast are discharges from wastewater treatment plants and run off from agricultural land. Phytoplankton in the estuaries and coastal waters around Ireland are monitored by the EnvironmentalProtection Agency (EPA) and the Marine Institute. They monitor phytoplankton to assess the quality (status) of our marine environment. They must do this as part of the requirements of the European Water Framework Directive.
Answering a question on Planktology course for 2nd year B.Sc. student at University of Chittagong, Chattogram 4331, Bangladesh. Submission date: 28th November, 2018.
Diatoms are unicellular photosynthetic algae. These phytoplankton mi.pdfANANDSALESINDIA105
Diatoms are unicellular photosynthetic algae. These phytoplankton microorganisms that are
commonly found in any habitat that contains water. Some diatoms remain isolated and adrift
while others group together to form colonies. A distinctive feature of diatoms is their transparent
cell walls made of hydrated silica which give them a translucent quality. Diatoms make up the
bottom layer of the food chain and have important ecological functions on a global scale.
Diatoms are responsible for 20% of all global carbon fixation and thus they are major
contributors to climate change processes, and form a substantial basis of the marine food web.
Diatoms as biomarkers:These organisms are highly sensitive to pH and salinity, nutrient
concentration, suspended sediment amounts,elevation and human disturbance and certain types
of diatoms can grow only in some areas. As a result, the presence or absence of this species can
tell a lot about the water chemistry of a certain area. Since the silica walls of diatoms do not get
decomposed, diatoms in lakes and other water bodies can help to infer the history of such water
bodies.In parallel to their ecology, the diatoms are also interesting for the study of evolution,
because their genomes are the result of a fusion of three genomes derived from their
cyanobacterial and eukaryotic ancestors.
Diatoms as carbon fixers: Diatoms rely on the process of photosynthesis to make food, although
a few diatom organisms may rely on floating nutrients found in their habitat.Because diatoms use
photosynthesis to produce food, these organisms are responsible for providing energy to the
ocean\'s ecosystem. The process of photosynthesis requires carbon di oxide, which they utilise
from their environment, also releasing oxygen in the process. It is estimated that diatoms produce
almost 1/4th of the oxygen we breathe. Although they form only a small part of the
photosynthetic biomass, in some regions of the ocean, they can fix the same amount of carbon
per day as a forest of terrestrial plants. There are at least 100,000 species of diatoms, which
makes them the most abundant photosynthetic group after the angiosperms. Thus, a decrease in
the population of diatoms has the potential to bring about climate change by causing an increase
in the amount of unfixed carbon and decrease in the levels of oxygen, required for respiration of
most living organisms. The pollution of the environment has led to a decrease in the levels of
nitrogen and trace minerals using diaed for carbon fixation, which has started impacting diatom
populations.
Diatoms in the food chain: They are eaten by some crustaceans and larvae of certain larger
animals. Such small animals that feed on plankton rely on nutrient rich diatoms for survival.
Some economically important fishes such as the menhaden are prominent diatom feeders. A
large number of aquatic organisms feed on diatoms in the first few periods after birth, but soon
change to a mixture of diatoms and a car.
Neuro-symbolic is not enough, we need neuro-*semantic*Frank van Harmelen
Neuro-symbolic (NeSy) AI is on the rise. However, simply machine learning on just any symbolic structure is not sufficient to really harvest the gains of NeSy. These will only be gained when the symbolic structures have an actual semantics. I give an operational definition of semantics as “predictable inference”.
All of this illustrated with link prediction over knowledge graphs, but the argument is general.
PHP Frameworks: I want to break free (IPC Berlin 2024)Ralf Eggert
In this presentation, we examine the challenges and limitations of relying too heavily on PHP frameworks in web development. We discuss the history of PHP and its frameworks to understand how this dependence has evolved. The focus will be on providing concrete tips and strategies to reduce reliance on these frameworks, based on real-world examples and practical considerations. The goal is to equip developers with the skills and knowledge to create more flexible and future-proof web applications. We'll explore the importance of maintaining autonomy in a rapidly changing tech landscape and how to make informed decisions in PHP development.
This talk is aimed at encouraging a more independent approach to using PHP frameworks, moving towards a more flexible and future-proof approach to PHP development.
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PowSyBl is an open source project hosted by LF Energy, which offers a comprehensive set of features for electrical grid modelling and simulation. Among other advanced features, PowSyBl provides:
- A fully editable and extendable library for grid component modelling;
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The framework is mostly written in Java, with a Python binding so that Python developers can access PowSyBl functionalities as well.
What you will learn during the webinar:
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JMeter webinar - integration with InfluxDB and GrafanaRTTS
Watch this recorded webinar about real-time monitoring of application performance. See how to integrate Apache JMeter, the open-source leader in performance testing, with InfluxDB, the open-source time-series database, and Grafana, the open-source analytics and visualization application.
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Length: 30 minutes
Session Overview
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During this webinar, we will cover the following topics while demonstrating the integrations of JMeter, InfluxDB and Grafana:
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- Demonstration of InfluxDB and Grafana using a practice web application
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https://www.rttsweb.com/jmeter-integration-webinar
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2. The organisms inhabiting the pelagic zone are grouped
into two broad categories-plankton & nekton.
The word plankton was first of coined by Henson
,which means that which drifts.
Plankton further divided into phytoplankton &
zooplankton.
Most phytoplankton are too small to be individually
seen with the unaided eye.
When they present in high enough numbers ,they may
appear as green discoloration of the water due to the
presence of chlorophyll within their cells.
INTRODUCTION
3.
Phytoplankton include wide variety of
photosynthetic organism like
1) Diatoms
2) Dinoflagellates
3) Cryptomonads
4) Green algae
5) Blue green algae
Out of these diatoms & dinoflagellates are
predominate.
TYPES OF
PHYTOPLANKTON
4.
The diatoms are enclosed within a box made up of
two parts or valves fitting one over another.
The box is made up of silicon dioxide & is
ornamented with species specific designs pits &
perforations.
They are dominant in temperate & colder regions.
They may occur singly or may occur in chains.
DIATOMS
6.
The second major group of phytoplankton is
recognizable by possesssing two flagella.
They use flagella to move themselves through the
water.
They lack the external skeleton of silicon but are
often armored with plates of the carbohydrates
cellulose.
They are solitary , single small organisms.
DINOFLAGELLATES
7.
The microscopic phytoplankton float on or near the
surface of water.
As they are autotrophic components of the plankton
community they are responsible for much of the
oxygen present in earth’s atmosphere.
The population of phytoplankton in any aquatic system
is biological wealth of water for fishes & constitutes a
vital link in the food chain.
Phtyoplankton have definite role in proper growth &
maintenance of a water body.
ECOLOGICAL
BALANCE
8.
Phytoplankton is a key food item in both Aquaculture &
mariculture .And it is utilized as food for animals being
farmed.
In mariculture , the phytoplankton is naturally occuring
& is introduced into enclosures with the normal
circulation of sea water.
In aquaculture, phytoplankton must be obtained &
introduced directly.
Phytoplankton is also used to feed many varieties of
aquacultured molluscs, including pearl oysters.
BENEFITS
9.
As the marine phytoplankton have declined
substantially in the world’s oceans over the past
century.
Phytoplankton in surface waters have decreased by
about 40% since 1950 alone, at a rate of 1% per year
due to ocean warming.
Due to emission of carbon dioxide from humans it
causes increases in disturbances in marine food web
& due to this there is a percentage decline in the fish
species which feed on phytoplankton
HUMAN IMPACTS
11.
As marine phytoplankton is declining substantially
in the world’s ocean.
There must be decrease in not only in air borne
fraction of pollutions but also in other type of
pollutions from humans.
Due to this there will be a enrichment in marine
ecology.
CONCLUSION
12.
Buschbaum, Ralph and Milne, Lorus J. 1960. The
Lower Animals, Doubleday and Co. New York.
Silverberg, Robert. 1972. The World Beneath the
Ocean Wave. Weybright and Talley, New York.
REFERENCES