The document discusses features of the seafloor and morphology of planet Earth. It describes how the discovery of mid-ocean ridges and convection cells in the asthenosphere led to the theory of plate tectonics and seafloor spreading. Pangaea was the only supercontinent approximately 200 million years ago, which later broke into Laurasia and Gondwanaland. The morphology of Earth is constantly changing due to gradual cracking and movement of tectonic plates at ridges, trenches, and faults. The document also summarizes key features of the seafloor including the continental margin, continental rise, ocean basin floor, abyssal plains, oceanic rises, seamounts, and trenches.
The continental shelf is an underwater landmass which extends from a continent, resulting in an area of relatively shallow water known as a shelf sea. Much of the shelves were exposed during glacial periods and interglacial periods
After attending this lesson, the user would be able to understand the basic characteristics of the submarine canyons, their origin, and their distribution in various major oceans of the world.
Detailed information about the morphological conditions, sedimentology and marine life of the submarine canyons will also be understood.
The continental shelf is an underwater landmass which extends from a continent, resulting in an area of relatively shallow water known as a shelf sea. Much of the shelves were exposed during glacial periods and interglacial periods
After attending this lesson, the user would be able to understand the basic characteristics of the submarine canyons, their origin, and their distribution in various major oceans of the world.
Detailed information about the morphological conditions, sedimentology and marine life of the submarine canyons will also be understood.
Written information are rightfully gathered from the internet. Kindly, use this properly including proper citation. This is a presentation made during our high school days.
Seas and Oceans are blue beauties of the planet earth.
Oceans are vast body of saline water occupying the great depressions on the earth. The surface beneath the oceanic waters is characterized by a lot of relief features.
The structure, configuration and relief features of the oceans also vary from each other.On the basis of Bathymetry and other studies, the morphology of Ocean basins contains a lot of relief features. This module highlights many of those features.
Written information are rightfully gathered from the internet. Kindly, use this properly including proper citation. This is a presentation made during our high school days.
Seas and Oceans are blue beauties of the planet earth.
Oceans are vast body of saline water occupying the great depressions on the earth. The surface beneath the oceanic waters is characterized by a lot of relief features.
The structure, configuration and relief features of the oceans also vary from each other.On the basis of Bathymetry and other studies, the morphology of Ocean basins contains a lot of relief features. This module highlights many of those features.
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.
This presentation is for my school assessment on global environments. I chose coral reefs. My project explains coral reefs and the geographical processes involved with it as well.
a glimpse of ocean world.
life in ocean
earth ocean
marine science
environment science
home science
aquatic life
ocean flora and fauna
aquaculture
sea food
marine resources
indian ocean
pacific ocean
atlantic ocean
life in the ocean
deep sea
mid sea
costal life
marine ecosystem
It's a worksheet about ocean information and has the following topics:What are Earth’s five main oceans?How is the ocean floor studied? What are the two main regions of the ocean floor? What are the features of the ocean floor?including activities to develop in the science class
Cv of dr. abhijit mitra, department of marine science, calcutta universityAbhijit Mitra
Dr. Abhijit Mitra, Associate Professor and former Head, Dept. of Marine Science, University of Calcutta (INDIA) has been active in the sphere of Oceanography since 1985. He obtained his Ph.D as NET qualified scholar in 1994 after securing Gold Medal in M.Sc (Marine Science) from University of Calcutta. Since then he joined Calcutta Port Trust and WWF (World Wide Fund), in various capacities to carry out research programmes on environmental science, biodiversity conservation, climate change and carbon sequestration. Presently Dr. Mitra is serving Techno India University, West Bengal as the Director of Research. He has to his credit about 485 scientific publications in various National and International journals, and 36 books of postgraduate standards. Dr. Mitra is presently the member of several committees like PACON International, IUCN, SIOS etc. and has successfully completed about 16 projects on biodiversity loss in fishery sector, coastal pollution, alternative livelihood, climate change and carbon sequestration. Dr. Mitra also visited as faculty member and invited speakers in several foreign Universities of Singapore, Kenya, Oman and USA. In 2008, Dr. Mitra was invited as visiting fellow at University of Massachusetts at Dartmouth, USA to deliver a series of lecture on Climate Change. Dr. Mitra also successfully guided 32 Ph.D students. Presently his domain of expertise includes environmental science, mangrove ecology, sustainable aquaculture, alternative livelihood, climate change and carbon sequestration.
Cv of dr. abhijit mitra, calcutta universityAbhijit Mitra
Dr. Abhijit Mitra, Associate Professor and former Head, Dept. of Marine Science, University of Calcutta (INDIA) has been active in the sphere of Oceanography since 1985. He obtained his Ph.D as NET qualified scholar in 1994 after securing Gold Medal in M.Sc (Marine Science) from University of Calcutta. Since then he joined Calcutta Port Trust and WWF (World Wide Fund), in various capacities to carry out research programmes on environmental science, biodiversity conservation, climate change and carbon sequestration. Presently Dr. Mitra is serving as the advisor of Oceanography Division of Techno India University, West Bengal. He has to his credit about 475 scientific publications in various National and International journals, and 36 books of postgraduate standards. Dr. Mitra is presently the member of several committees like PACON International, IUCN, SIOS etc. and has successfully completed about 16 projects on biodiversity loss in fishery sector, coastal pollution, alternative livelihood, climate change and carbon sequestration. Dr. Mitra also visited as faculty member and invited speakers in several foreign Universities of Singapore, Kenya, Oman and USA. In 2008, Dr. Mitra was invited as visiting fellow at University of Massachusetts at Dartmouth, USA to deliver a series of lecture on Climate Change. Dr. Mitra also successfully guided 32 Ph.D students. Presently his domain of expertise includes environmental science, mangrove ecology, sustainable aquaculture, alternative livelihood, climate change and carbon sequestration.
Dr. Abhijit Mitra, Associate Professor and former Head, Dept. of Marine Science, University of Calcutta (INDIA) has been active in the sphere of Oceanography since 1985. He obtained his Ph.D as NET qualified scholar in 1994. Since then he joined Calcutta Port Trust and WWF (World Wide Fund), in various capacities to carry out research programmes on environmental science, biodiversity conservation, climate change and carbon sequestration. Presently Dr. Mitra is serving as the advisor of Oceanography Division of Techno India University, Kolkata. He has to his credit about 388 scientific publications in various National and International journals, and 34 books of postgraduate standards. Dr. Mitra has successfully completed about 16 projects on biodiversity loss in fishery sector, coastal pollution, alternative livelihood, climate change and carbon sequestration. Dr. Mitra also visited as faculty member and invited speakers in several foreign Universities of Singapore, Kenya, Oman and USA. In 2008, Dr. Mitra was invited as visiting fellow at University of Massachusetts at Dartmouth, USA to deliver a series of lecture on Climate Change. Dr. Mitra also successfully guided 29 Ph.D students. Presently his domain of expertise includes environmental science, mangrove ecology, sustainable aquaculture, alternative livelihood, climate change and carbon sequestration.
Dr. Abhijit Mitra, Associate Professor and former Head, Dept. of Marine Science, University of Calcutta (INDIA) has been active in the sphere of Oceanography since 1985. He obtained his Ph.D as NET qualified scholar in 1994. Since then he joined Calcutta Port Trust and WWF (World Wide Fund), in various capacities to carry out research programmes on environmental science, biodiversity conservation, climate change and carbon sequestration. Presently Dr. Mitra is serving as the advisor of Oceanography Division of Techno India University, Kolkata. He has to his credit about 388 scientific publications in various National and International journals, and 34 books of postgraduate standards. Dr. Mitra has successfully completed about 16 projects on biodiversity loss in fishery sector, coastal pollution, alternative livelihood, climate change and carbon sequestration. Dr. Mitra also visited as faculty member and invited speakers in several foreign Universities of Singapore, Kenya, Oman and USA. In 2008, Dr. Mitra was invited as visiting fellow at University of Massachusetts at Dartmouth, USA to deliver a series of lecture on Climate Change. Dr. Mitra also successfully guided 29 Ph.D students. Presently his domain of expertise includes environmental science, mangrove ecology, sustainable aquaculture, alternative livelihood, climate change and carbon sequestration.
Destruction and mitigation.. BY DR. ABHIJIT MITRAAbhijit Mitra
Dr. Abhijit Mitra, Associate Professor and former Head, Dept. of Marine Science, University of Calcutta (INDIA) has been active in the sphere of Oceanography since 1985. He obtained his Ph.D as NET qualified scholar in 1994. Since then he joined Calcutta Port Trust and WWF (World Wide Fund), in various capacities to carry out research programmes on environmental science, biodiversity conservation, climate change and carbon sequestration. Presently Dr. Mitra is serving as the advisor of Oceanography Division of Techno India University, Kolkata. He has to his credit about 388 scientific publications in various National and International journals, and 34 books of postgraduate standards. Dr. Mitra has successfully completed about 16 projects on biodiversity loss in fishery sector, coastal pollution, alternative livelihood, climate change and carbon sequestration. Dr. Mitra also visited as faculty member and invited speakers in several foreign Universities of Singapore, Kenya, Oman and USA. In 2008, Dr. Mitra was invited as visiting fellow at University of Massachusetts at Dartmouth, USA to deliver a series of lecture on Climate Change. Dr. Mitra also successfully guided 29 Ph.D students. Presently his domain of expertise includes environmental science, mangrove ecology, sustainable aquaculture, alternative livelihood, climate change and carbon sequestration.
Artificial Reefs by Kuddle Life Foundation - May 2024punit537210
Situated in Pondicherry, India, Kuddle Life Foundation is a charitable, non-profit and non-governmental organization (NGO) dedicated to improving the living standards of coastal communities and simultaneously placing a strong emphasis on the protection of marine ecosystems.
One of the key areas we work in is Artificial Reefs. This presentation captures our journey so far and our learnings. We hope you get as excited about marine conservation and artificial reefs as we are.
Please visit our website: https://kuddlelife.org
Our Instagram channel:
@kuddlelifefoundation
Our Linkedin Page:
https://www.linkedin.com/company/kuddlelifefoundation/
and write to us if you have any questions:
info@kuddlelife.org
UNDERSTANDING WHAT GREEN WASHING IS!.pdfJulietMogola
Many companies today use green washing to lure the public into thinking they are conserving the environment but in real sense they are doing more harm. There have been such several cases from very big companies here in Kenya and also globally. This ranges from various sectors from manufacturing and goes to consumer products. Educating people on greenwashing will enable people to make better choices based on their analysis and not on what they see on marketing sites.
Natural farming @ Dr. Siddhartha S. Jena.pptxsidjena70
A brief about organic farming/ Natural farming/ Zero budget natural farming/ Subash Palekar Natural farming which keeps us and environment safe and healthy. Next gen Agricultural practices of chemical free farming.
WRI’s brand new “Food Service Playbook for Promoting Sustainable Food Choices” gives food service operators the very latest strategies for creating dining environments that empower consumers to choose sustainable, plant-rich dishes. This research builds off our first guide for food service, now with industry experience and insights from nearly 350 academic trials.
"Understanding the Carbon Cycle: Processes, Human Impacts, and Strategies for...MMariSelvam4
The carbon cycle is a critical component of Earth's environmental system, governing the movement and transformation of carbon through various reservoirs, including the atmosphere, oceans, soil, and living organisms. This complex cycle involves several key processes such as photosynthesis, respiration, decomposition, and carbon sequestration, each contributing to the regulation of carbon levels on the planet.
Human activities, particularly fossil fuel combustion and deforestation, have significantly altered the natural carbon cycle, leading to increased atmospheric carbon dioxide concentrations and driving climate change. Understanding the intricacies of the carbon cycle is essential for assessing the impacts of these changes and developing effective mitigation strategies.
By studying the carbon cycle, scientists can identify carbon sources and sinks, measure carbon fluxes, and predict future trends. This knowledge is crucial for crafting policies aimed at reducing carbon emissions, enhancing carbon storage, and promoting sustainable practices. The carbon cycle's interplay with climate systems, ecosystems, and human activities underscores its importance in maintaining a stable and healthy planet.
In-depth exploration of the carbon cycle reveals the delicate balance required to sustain life and the urgent need to address anthropogenic influences. Through research, education, and policy, we can work towards restoring equilibrium in the carbon cycle and ensuring a sustainable future for generations to come.
Characterization and the Kinetics of drying at the drying oven and with micro...Open Access Research Paper
The objective of this work is to contribute to valorization de Nephelium lappaceum by the characterization of kinetics of drying of seeds of Nephelium lappaceum. The seeds were dehydrated until a constant mass respectively in a drying oven and a microwawe oven. The temperatures and the powers of drying are respectively: 50, 60 and 70°C and 140, 280 and 420 W. The results show that the curves of drying of seeds of Nephelium lappaceum do not present a phase of constant kinetics. The coefficients of diffusion vary between 2.09.10-8 to 2.98. 10-8m-2/s in the interval of 50°C at 70°C and between 4.83×10-07 at 9.04×10-07 m-8/s for the powers going of 140 W with 420 W the relation between Arrhenius and a value of energy of activation of 16.49 kJ. mol-1 expressed the effect of the temperature on effective diffusivity.
Micro RNA genes and their likely influence in rice (Oryza sativa L.) dynamic ...Open Access Research Paper
Micro RNAs (miRNAs) are small non-coding RNAs molecules having approximately 18-25 nucleotides, they are present in both plants and animals genomes. MiRNAs have diverse spatial expression patterns and regulate various developmental metabolisms, stress responses and other physiological processes. The dynamic gene expression playing major roles in phenotypic differences in organisms are believed to be controlled by miRNAs. Mutations in regions of regulatory factors, such as miRNA genes or transcription factors (TF) necessitated by dynamic environmental factors or pathogen infections, have tremendous effects on structure and expression of genes. The resultant novel gene products presents potential explanations for constant evolving desirable traits that have long been bred using conventional means, biotechnology or genetic engineering. Rice grain quality, yield, disease tolerance, climate-resilience and palatability properties are not exceptional to miRN Asmutations effects. There are new insights courtesy of high-throughput sequencing and improved proteomic techniques that organisms’ complexity and adaptations are highly contributed by miRNAs containing regulatory networks. This article aims to expound on how rice miRNAs could be driving evolution of traits and highlight the latest miRNA research progress. Moreover, the review accentuates miRNAs grey areas to be addressed and gives recommendations for further studies.
1. FEATURES OF SEAFLOORFEATURES OF SEAFLOOR
§§ The discovery of mid-oceanThe discovery of mid-ocean
ridge system and the idea ofridge system and the idea of
convection cells in theconvection cells in the
asthenosphere led toasthenosphere led to
seafloor spreadingseafloor spreading asas
the mechanism forthe mechanism for
continental drift. The conceptcontinental drift. The concept
ofof continental driftcontinental drift andand
the theory of seafloorthe theory of seafloor
spreading combined tospreading combined to
produce plate tectonics,produce plate tectonics,
which propose thatwhich propose that thethe
plates are made up ofplates are made up of
continental and oceaniccontinental and oceanic
lithosphere bounded bylithosphere bounded by
ridges, trenches and faults.ridges, trenches and faults.
3. MORPHOLOGY OF PLANETMORPHOLOGY OF PLANET
EARTHEARTH
Laurasia = The northern portion of Pangaea composed of North America and Eurasia
4. MORPHOLOGY OF PLANETMORPHOLOGY OF PLANET
EARTHEARTH
Gondwanaland = The southern portion of Pangaea consisting of Africa, South
America, India, Australia and Antarctica
10. Continental margin (Shelf + Slope)Continental margin (Shelf + Slope)
§§ The continental margin includes the continental shelf andThe continental margin includes the continental shelf and
slope. Theslope. The continental shelvescontinental shelves fringe the continents andfringe the continents and
slope gently towards the ocean basins. They are relativelyslope gently towards the ocean basins. They are relatively
flat, generally less than 130 m deep. However, the rangeflat, generally less than 130 m deep. However, the range
of the depth for the continental shelf is 30 m to aboutof the depth for the continental shelf is 30 m to about
275 m. The criterion for defining the seaward edge of the275 m. The criterion for defining the seaward edge of the
continental shelf is a marked change in slope. Thecontinental shelf is a marked change in slope. The
continental shelf has a gradient of about 1:1000.continental shelf has a gradient of about 1:1000.
§§ Seaward from the continental shelf is theSeaward from the continental shelf is the continentalcontinental
slopeslope, which extends to a depth of 1.6 to 3.2 Km. The, which extends to a depth of 1.6 to 3.2 Km. The
continental slope, has a gradient between 1:2 and 1:40.continental slope, has a gradient between 1:2 and 1:40.
Many submarine canyons scar the slope, which may be asMany submarine canyons scar the slope, which may be as
deep as 1200 m. It is believed that these canyons havedeep as 1200 m. It is believed that these canyons have
been cut by turbidity current of dense sediment–ladenbeen cut by turbidity current of dense sediment–laden
waters flowing down the surface of the continental slope.waters flowing down the surface of the continental slope.
11. Continental riseContinental rise
§§ Sediments from the continental shelf areSediments from the continental shelf are
carried into the deep ocean through thecarried into the deep ocean through the
canyons present in the continental slope. Atcanyons present in the continental slope. At
the foot of the continental slope, thethe foot of the continental slope, the
suspended materials and sediments settlesuspended materials and sediments settle
out, that slope gently towards the oceanout, that slope gently towards the ocean
floor. This region is called thefloor. This region is called the continentalcontinental
rise and has a gradient between 1:50 torise and has a gradient between 1:50 to
1:8001:800. The continental rise is fairly well. The continental rise is fairly well
developed in the Atlantic and Indiandeveloped in the Atlantic and Indian
oceans, but is narrow or almost non-oceans, but is narrow or almost non-
existent in the Pacific Ocean.existent in the Pacific Ocean.
12. Ocean basin floorOcean basin floor
§§ The ocean basin floor extends seaward fromThe ocean basin floor extends seaward from
the continental rise or the continentalthe continental rise or the continental
margins and includes the abyssal plains,margins and includes the abyssal plains,
oceanic rises, seamounts and trenches.oceanic rises, seamounts and trenches.
13. Abyssal plainAbyssal plain
§§ Abyssal plainsAbyssal plains are found at the base ofare found at the base of
the continental rise and are relatively flatthe continental rise and are relatively flat
plains having a gradient less than 1:1000.plains having a gradient less than 1:1000.
They are formed due to even depositionThey are formed due to even deposition
of sediments from the continental riseof sediments from the continental rise
carried down by the turbidity currentscarried down by the turbidity currents..
14. Oceanic risesOceanic rises
§§ Oceanic rises refer to rather isolatedOceanic rises refer to rather isolated
areas, which are elevated above theareas, which are elevated above the
abyssal floor and are distributedabyssal floor and are distributed
sporadically on the ocean basin floor.sporadically on the ocean basin floor.
They may vary from low hills toThey may vary from low hills to
mountains as high as 1525 m. Themountains as high as 1525 m. The
example of Bermuda rise is veryexample of Bermuda rise is very
prominent in this context on which theprominent in this context on which the
Bermuda Islands are formed.Bermuda Islands are formed.
15. SeamountsSeamounts
§§ SeamountsSeamounts are isolated peaks thatare isolated peaks that
rise several thousand meters aboverise several thousand meters above
the sea floor. They are volcanic inthe sea floor. They are volcanic in
origin and are found principally in theorigin and are found principally in the
vicinity of the fault zones.vicinity of the fault zones.
16. TRENCHESTRENCHES
§§ TrenchesTrenches are long narrow depressions in theare long narrow depressions in the
ocean floor that are over 6100 m deep. Theocean floor that are over 6100 m deep. The
deepest known trench in the oceandeepest known trench in the ocean
compartment is thecompartment is the Mariana trenchMariana trench of theof the
western North Pacific that is about 11,000 mwestern North Pacific that is about 11,000 m
deep. Trenches are invariably associated withdeep. Trenches are invariably associated with
the systems of active volcanoes, and arethe systems of active volcanoes, and are
believed to be caused by down wrapping of thebelieved to be caused by down wrapping of the
oceanic crust beneath the continental crust.oceanic crust beneath the continental crust.
17. DO LIFE EXISTS IN DEEPDO LIFE EXISTS IN DEEP
OCEAN?OCEAN?
§§ Yes – peculiar hydrothermal vent basedYes – peculiar hydrothermal vent based
biotic communities exist in the deep sea,biotic communities exist in the deep sea,
but the species diversity is extremelybut the species diversity is extremely
poor and food chain members are low.poor and food chain members are low.
18. BIODIVERSITY OF DEEPBIODIVERSITY OF DEEP
OCEAN FLOOROCEAN FLOOR
§§ Despite the extremes of temperature and pressure, these self-containedDespite the extremes of temperature and pressure, these self-contained
communities are some of the most productive in the sea and stand as thecommunities are some of the most productive in the sea and stand as the
proof of dependence of biotic community on non-conventional energyproof of dependence of biotic community on non-conventional energy
source. Chemosynthesis forms the foundation of such community andsource. Chemosynthesis forms the foundation of such community and
chemosynthetic bacteria occupy the first tropic level. Few common fauna ofchemosynthetic bacteria occupy the first tropic level. Few common fauna of
the hydrothermal vent community are listed here:the hydrothermal vent community are listed here:
§§ Giant white clamsGiant white clams – Calyotogena magnifica– Calyotogena magnifica
§§ MusselsMussels - Bathymodiolus thermophilus- Bathymodiolus thermophilus
§§ Tube wormTube worm -- Riftia pachyptilaRiftia pachyptila
§§ Galatheid crabGalatheid crab -- MunidopsisMunidopsis sp.sp.
§§ Enteropneust wormEnteropneust worm - Saxipendium coronatum- Saxipendium coronatum
§§ Brachyuran crabBrachyuran crab - Bythograea thermydron- Bythograea thermydron
§§ Turrid gastropodTurrid gastropod -- PhymorphynchusPhymorphynchus sp.sp.
19. §§ New lithosphere is formed at the ridges, or spreading centres;New lithosphere is formed at the ridges, or spreading centres;
old lithospheric material descends into trenches at subductionold lithospheric material descends into trenches at subduction
zones.zones.
§§ Evidence for lithospheric motion includes the match of theEvidence for lithospheric motion includes the match of the
earthquake zones to spreading centres and subduction zones,earthquake zones to spreading centres and subduction zones,
greater crustal heat flow near ridges, age measurement ofgreater crustal heat flow near ridges, age measurement of
seafloor rocks, age and thickness measurements of sedimentseafloor rocks, age and thickness measurements of sediment
from deep sea cores and the magnetic stripes in the seafloorfrom deep sea cores and the magnetic stripes in the seafloor
basalt on either side of the ridge system.basalt on either side of the ridge system.