Hafez Ahmad has experience in hydrology, GIS, remote sensing, ecology and wildlife research. He received degrees from the University of Chittagong in Bangladesh and Florida Gulf Coast University. Most recently, he worked for the Wildlife Conservation Society Bangladesh Program as a Marine Data Management Officer. Currently, he is a student at Mississippi State University, where he can be reached by phone or email.
This slide is going to be present the ecosystem and biodiversity of Bangladesh and also some basic part of ecosystem such as Nitrogen cycle, hydrological cycle and other environmental cycle related with ecosystem.
This slide is going to be present the ecosystem and biodiversity of Bangladesh and also some basic part of ecosystem such as Nitrogen cycle, hydrological cycle and other environmental cycle related with ecosystem.
Biodiversity is variety…
of organisms in a given area
of genetic variation within a population
of species in a community
of communities in an ecosystem
Humans need to understand & preserve biodiversity for our own survival.
Biodiversity is variety…
of organisms in a given area
of genetic variation within a population
of species in a community
of communities in an ecosystem
Humans need to understand & preserve biodiversity for our own survival.
The Ecology and Ecosystems unit notes blend in Evolutionary adaptations and Evidence for Evolution along with standard E&E topics. The notes has examples of key content areas. Originally designed for Junior High and High School students, we use these for 7-8th grade students and warm ups for High School students. Includes basic concepts, food chain, webs, energy pyramids, matter cyclers, predator-prey, trophic levels; along with Ecosystem types, carrying capacity as well as Rules of the Environment.
This is the introductory lesson of the course; 'Foundation of Environmental Management' taught at the Faculty of Social Sciences and Humanities of the Rajarata University of Sri Lanka
Blue economy is a term in economics relating to the exploitation, preservation and regeneration of the marine environment. Its scope of interpretation varies among organizations.According to the World Bank, the blue economy is the "sustainable use of ocean resources for economic growth, improved livelihoods, and jobs while preserving the health of ocean ecosystem." European Commission defines it as "All economic activities related to oceans, seas and coasts.
Implementation of a high-resolution regional ocean modeling system (ROMS) for...Hafez Ahmad
The goal of this study is to develop a High-resolution Regional Ocean Model and
implement it with the help of the Regional Ocean Modeling System (ROMS) for the Bay
of Bengal which is a tropical ocean basin with three sides covered by land and an Open
Ocean on the south side. A new generation of sophisticated ocean circulation ROMS has
been specially customized for accurate simulation of the Bay of Bengal ocean systems. It
covered a wide range of features including higher-order advection schemes, accurate and
efficient physical and numerical algorithms, and several subgrid-scale parameterizations,
atmospheric, oceanic, and benthic boundary layers, several coupled models for
atmosphere, ocean, biogeochemical, and ecosystem responses. Besides, ROMS produced
a large amount of data depicting various properties of the ocean such as water temperature,
flow velocity, water density, and salinity, etc. The model outputs showed that the upper
layer circulation of the Bay of Bengal is subjected to strong seasonal variability. During
the early northeast monsoon in November, the large-scale flow pattern in the bay is
cyclonic and the western boundary current, the East Indian coastal current (EICC) flows
southward from the Bengal shelf north of 200N to the east coast of Sri Lanka. A cyclonic
gyre that forms in the southwestern Bay of Bengal during October. In December it covered
almost the whole bay from 84ºE to 93ºE and 8ºN to 18ºN. It dies off until late April where
we can only see a cyclonic eddy centered at 12ºN 86ºE. At the end of June, the circulation
in the Bay is mainly anticyclonic and dominated by four eddies centered at 10ºN 83ºE,
11ºN 86ºE, 15ºN 91ºE1, and 8ºN 86ºE. During July these anticyclonic eddies move towards
the west of the bay and by the end of August, the anticyclonic circulation of the Bay is
confined to the west of the bay. In September the anticyclonic gyre is much smaller and to
the north of the Bay. The freshwater plume along the northwest part of the Bay is well
reproduced by the model even if the river discharge was not included in the model. It does
not advect towards the interior of the bay not until the end of the southwest winds. The
represented model also shows the seasonal cycle of the surface temperature. And this
modeling tried to resolve some important atmospheric and oceanic features in reasonable
ways, analyzed and presented in this research. Some parameters such as temperature and
salinity profiles were verified with model and Argo data in the area of the Bay of Bengal.
Predicted Seagrass habitat across the shallow ocean Hafez Ahmad
this is an application of machine learning in the field of geospatial science. I have created this seagrass habitat map using Florida, USA based data with the help of ArcGIS pro and python3.
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.
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.
Willie Nelson Net Worth: A Journey Through Music, Movies, and Business Venturesgreendigital
Willie Nelson is a name that resonates within the world of music and entertainment. Known for his unique voice, and masterful guitar skills. and an extraordinary career spanning several decades. Nelson has become a legend in the country music scene. But, his influence extends far beyond the realm of music. with ventures in acting, writing, activism, and business. This comprehensive article delves into Willie Nelson net worth. exploring the various facets of his career that have contributed to his large fortune.
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Introduction
Willie Nelson net worth is a testament to his enduring influence and success in many fields. Born on April 29, 1933, in Abbott, Texas. Nelson's journey from a humble beginning to becoming one of the most iconic figures in American music is nothing short of inspirational. His net worth, which estimated to be around $25 million as of 2024. reflects a career that is as diverse as it is prolific.
Early Life and Musical Beginnings
Humble Origins
Willie Hugh Nelson was born during the Great Depression. a time of significant economic hardship in the United States. Raised by his grandparents. Nelson found solace and inspiration in music from an early age. His grandmother taught him to play the guitar. setting the stage for what would become an illustrious career.
First Steps in Music
Nelson's initial foray into the music industry was fraught with challenges. He moved to Nashville, Tennessee, to pursue his dreams, but success did not come . Working as a songwriter, Nelson penned hits for other artists. which helped him gain a foothold in the competitive music scene. His songwriting skills contributed to his early earnings. laying the foundation for his net worth.
Rise to Stardom
Breakthrough Albums
The 1970s marked a turning point in Willie Nelson's career. His albums "Shotgun Willie" (1973), "Red Headed Stranger" (1975). and "Stardust" (1978) received critical acclaim and commercial success. These albums not only solidified his position in the country music genre. but also introduced his music to a broader audience. The success of these albums played a crucial role in boosting Willie Nelson net worth.
Iconic Songs
Willie Nelson net worth is also attributed to his extensive catalog of hit songs. Tracks like "Blue Eyes Crying in the Rain," "On the Road Again," and "Always on My Mind" have become timeless classics. These songs have not only earned Nelson large royalties but have also ensured his continued relevance in the music industry.
Acting and Film Career
Hollywood Ventures
In addition to his music career, Willie Nelson has also made a mark in Hollywood. His distinctive personality and on-screen presence have landed him roles in several films and television shows. Notable appearances include roles in "The Electric Horseman" (1979), "Honeysuckle Rose" (1980), and "Barbarosa" (1982). These acting gigs have added a significant amount to Willie Nelson net worth.
Television Appearances
Nelson's char
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.
Alert-driven Community-based Forest monitoring: A case of the Peruvian Amazon
Introduction to ecology
1. -----------------------------------Education--------------------
University of Chittagong ,Bangladesh and
Florida Gulf Coast University, Florida, USA
Name: - Hafez Ahmad
I am passionate about Hydrology, GIS, remote sensing ,
Ecology and Wildlife research .
----------------------------------- Research-----------------------
----------------------------------- Experiences/ previous jobs-
I worked (Oct 2020- NOV 2021) for Wildlife Conservation
Society(WCS) Bangladesh Program as A Marine Data
Management officer, WCS Bangladesh
Mississippi State University
Department of Wildlife, Fisheries and Aquaculture
Mobile: +8801785601208
Email: ha626@msstate.edu
Thompson Hall ,220 (18) , 9AM to 2 PM
1
2. Introduction to Ecology
The word ecology was given by Biologist Hackle in 1869. it derived from Greek words “oikos”,
meaning habitat or place of living and “logos” meaning to study.
Ecology- The scientific study of interactions
between organisms and their environments,
focusing on energy Transfer.
The fundamental idea behind the study of
ecology is that all organisms are
interdependent.
What do organisms need to survive?
1. Food
2. Water
3. shelter
2
3. Environmental Factors
The environment is made up of two factors
a. Biotic factors- All living organism inhabiting the earth
(i.e. plants, animals, and bacteria)
a. Abiotic factors- nonliving parts of the environment
(i.e. temperature, soil, light , rainfall)
3 https://www.homeworklib.com/qaa/894110/what-are-biotic
and-abiotic-factors-in-an
4. Biosphere
Ecosystem
Community
Population
Organism
Unicellular or multicellular form
exhibiting characteristics of life: Fish, human
A group of organisms of one species living in the
same place at the same time
Several interacting populations that inhabits
a common environment and are interdependent
Population in community and the abiotic
factors with which they interact (ex. Marine)
Life supporting portions of earth composed of
air, land freshwater and salt water
Levels of Ecological Organization
4
5. Ecosystem
Ecosystem is a physical place where plants, animals,
As well as weather and landscape work together to form
A bubble of life. It contains abiotic and biotic components.
It can be very large (tropical rainforest )or very small(pond).
Typical lake Ecosystem
Every factor in an ecosystem depends on every other factor, either
directly or indirectly. A change in the temperature of an ecosystem will
often affect what plants will grow there, for instance. Animals that
depend on plants for food and shelter will have to adapt to the
changes, move to another ecosystem. But Climate change and global
warming are leading threats to the ecosystems.
5
https://www.biologyonline.com/tutorial
s/freshwater-producers-and-consumers
6. Classification of Ecology
Based on Environment or habitat
1. Aquatic ecology- study of the plants and animals
that live in our rivers , streams, ocean, lake and their
interactions
a. Marine ecology : Ocean , deep sea and estuary.
b. Freshwater ecology
I. Lotic (running water) : river, stream
II. Lentic (standing water): pond , lake
2. Terrestrial ecology : study of interaction of organism
on land.
a. Grassland ecology: ecology of grasslands, which are
regions dominated by grass species but containing other
non-woody plants
b. Forest ecology: ecology of wooded areas, including
rainforest, deciduous and evergreen, temperate and
boreal forest.
c. Desert ecology : study of interactions between both
biotic and abiotic components of desert environments
6
https://www.behance.net/gallery/12437951/Natu
re-Forest-Ecology-Art
https://www.dvarminz.
com/index.php?main_
page=product_info&pr
7. Types of species interactions
Parasitism Commensalism Mutualism
Neutralism Commensalism
Competition Parasitism
Species B
Species
A
+
0
-
- 0 +
Symbiosis is a close ecological relationship between the individuals of two (or more) different species.
Sometimes a symbiotic relationship benefits both species, sometimes one species benefits at the other's expense,
and in other cases neither species benefits.
Ecologists use a different term for each type of symbiotic relationship:
Commensalism -- one species benefits, the other is unaffected
Parasitism -- one species benefits, the other is harmed
Competition -- neither species benefits
Neutralism
Mutualism
-- both species are unaffected
-- both species benefit
Mutualism Commensalism
Parasitism 7
8. Habitat and Niche
Habitat – the place in which an organism lives out its life .i.e. address. And Niche- The role of a
species play in a community. . i.e. Job
Ex. Honey bees lives in the bee hive , forest (Habitat)
Honey bees job is to pollinate flowers to make honey (Niche)
Habitat focuses on how the environment impacts the organism while Niche focuses on how the
organism impacts the environment.
8
Niche
Habitat
Niche
9. There are 3 main types of feeding relationships
1. Producer-consumer: Producer: all autotrophs (plants) trap energy
from the sun. Consumer (heterotrophs) they ingest food containing
the sun’s energy. Consumers are divided into
a. Primary consumers (plant eaters). They directly depend on the plants
for their food. Insects, deer, cow
b. Secondary consumers (meat eater). They feed on primary
consumers. Frog, cat, snake , foxes
c. Tertiary consumers (meat eaters). They feed on secondary consumers.
tigers, lions
2. Predator-prey: predators are biotic limiting factors . They control
population
Size by feeding on prey. This needs balanced.
3. Parasite-host: The parasite lives on or in the body of the host. A few
examples of parasites are tapeworms, fleas.
Feeding relationships
Trophic levels
9
https://onlinesciencenotes.com/trophic-
levels-and-ecological-pyramids/
10. Food Chain Food Web
The arrow points to the eater and shows the transfer of trapped energy
Food webs show all of the possible paths
That energy can take in the ecosystem.
It also shows how organism are dependent on
each other in the ecosystem
A food chain shows a one way flow of energy
in an ecosystem. A food chain is a linear
network of links in a food web starting from
producer organisms and ending at an apex
predator species, detritivores, or decomposer
species.
Each level of a food chain represents a
different trophic level.
10
https://www.thinglink.com/scene/786024112798564354
11. Assignment and quiz
1. What is the role of organisms in the ecosystems? 1 points
2. Explain different between habitat and niche 2 points
3. Why are you interested in studying aquatic ecology? 5 points
1. Abiotic component of the Lake ecosystem
a. Plants
b. Fish
c. Temperature
d. Birds
2. The natural place of an organism or community is known as
a. Niche
b. Biome
c. Habitat
d. Habit
11
Ans. 2-3 page,11 font single spaced , Due Jan 13 at 11:59pm
Reference book: Freshwater Ecology: Concepts and Environmental Applications of Limnology ,2nd Edition
by Walter K. Dodds (Author), Matt R Whiles (Author)
Every factor in an ecosystem depends on every other factor, either directly or indirectly. A change in the temperature of an ecosystem will often affect what plants will grow there, for instance. Animals that depend on plants for food and shelter will have to adapt to the changes, move to another ecosystem, or perish.
The following table illustrates the correct use of these terms in interactions between Species "A" and Species "B".
"+" denotes benefit to the species"0" denotes no positive or negative effect"-" denotes an undesirable effect of the interaction.
Consumer can be herbivores, carnivores, omnivores and decomposer.
A food chain also shows how organisms are related to each other by the food they eat.