1. Biodiversity refers to the variety of species, habitats, and genetic diversity present in an ecosystem. Species diversity is the number of species, habitat diversity is the variety of habitats, and genetic diversity is the genetic variation within a species.
2. Plate tectonics, natural selection, and reproductive isolation influence biodiversity. Plate tectonics causes land masses to move over millions of years, isolating populations and allowing new species to form through allopatric speciation. Natural selection leads to evolution as individuals with traits better suited to the environment are more likely to survive and pass on their genes.
3. Ecosystem stability depends on resilience, diversity, and inertia. More complex ecosystems with high
This topic raises some engaging issues of debate concerning the moral justification for exploiting
species and the moral imperative for conserving them. Do other organisms have a right to moral
consideration? How is this justified? Do panda bears have a greater right than lichens? What about the rights
of “pest” or pathogenic organisms? To what extent are these a
This is the 6th lesson of the course - Foundation of Environmental Management taught at the Faculty of Social Sciences and Humanities, Rajarata University of Sri Lanka
Importance
Intrinsic Value
Extinctions
What is Biodiversity?
Genetic Biodiversity
Species Biodiversity
Ecosystem Biodiversity
Ecosystem Function
Marine Biodiversity
Caribbean Diversity
Extinctions
Threats to Biodiversity
Protection & MPA’s
BIODIVERSITY AND EVOLUTION
POPULATION
IMPORTANT ASPECTS OF POPULATION
BIRTH- Natural process in which parents give rise to new offspring.
DEATH- Reduces the number of existing individuals in a population.
MIGRATION- Movement of individuals into or out of the population.
IMMIGRATION- Movement of individuals into the population.
EMIGRATION- Movement of individuals out of the population.
PATTERNS OF POPULATION GROWTH
BIOTIC POTENTIAL- Maximum reproductive capacity of an organism given that the resources are unlimited.
EXPONENTIAL GROWTH- Capacity of a population to increase continuously without showing any signs of stabling or declining.
FACTORS THAT AFFECT POPULATION GROWTH OR SIZE
LIMITING FACTORS
-control the growth, size, and distribution of organisms
COMPETITION
ABIOTIC FACTORS
PREDATOR-PREY RELATIOSHIP
POPULATION DENSITY
EXTINCTION
Some famous mass extinction events
Causes of Extinction
This topic raises some engaging issues of debate concerning the moral justification for exploiting
species and the moral imperative for conserving them. Do other organisms have a right to moral
consideration? How is this justified? Do panda bears have a greater right than lichens? What about the rights
of “pest” or pathogenic organisms? To what extent are these a
This is the 6th lesson of the course - Foundation of Environmental Management taught at the Faculty of Social Sciences and Humanities, Rajarata University of Sri Lanka
Importance
Intrinsic Value
Extinctions
What is Biodiversity?
Genetic Biodiversity
Species Biodiversity
Ecosystem Biodiversity
Ecosystem Function
Marine Biodiversity
Caribbean Diversity
Extinctions
Threats to Biodiversity
Protection & MPA’s
BIODIVERSITY AND EVOLUTION
POPULATION
IMPORTANT ASPECTS OF POPULATION
BIRTH- Natural process in which parents give rise to new offspring.
DEATH- Reduces the number of existing individuals in a population.
MIGRATION- Movement of individuals into or out of the population.
IMMIGRATION- Movement of individuals into the population.
EMIGRATION- Movement of individuals out of the population.
PATTERNS OF POPULATION GROWTH
BIOTIC POTENTIAL- Maximum reproductive capacity of an organism given that the resources are unlimited.
EXPONENTIAL GROWTH- Capacity of a population to increase continuously without showing any signs of stabling or declining.
FACTORS THAT AFFECT POPULATION GROWTH OR SIZE
LIMITING FACTORS
-control the growth, size, and distribution of organisms
COMPETITION
ABIOTIC FACTORS
PREDATOR-PREY RELATIOSHIP
POPULATION DENSITY
EXTINCTION
Some famous mass extinction events
Causes of Extinction
Evolution, biodiversity, and population ecology by Kiersten LippmannKiersten Lippmann
Beautiful, graphic rich slides to engage students based on Essential Environment by Withgott and Laposota. Slides cover Chapter 3 evolution, biodiversity and population ecology
Species diversity introduction, types and importance, examples of species diversity, threats and conservation to species diversity, Biodiversity conservation.
M.SC (BOTANY) 2nd Year
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.
Evolution, biodiversity, and population ecology by Kiersten LippmannKiersten Lippmann
Beautiful, graphic rich slides to engage students based on Essential Environment by Withgott and Laposota. Slides cover Chapter 3 evolution, biodiversity and population ecology
Species diversity introduction, types and importance, examples of species diversity, threats and conservation to species diversity, Biodiversity conservation.
M.SC (BOTANY) 2nd Year
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.
Aquí tenemos un trabajo sobre el triásico, donde encontraremos bastante información sobre este (en inglés).
Donde pone by, podeis poner vuestros nombres. ;-)
This PowerPoint is one small part of the Geology Topics unit from www.sciencepowerpoint.com. This unit consists of a five part 6000+ slide PowerPoint roadmap, 14 page bundled homework package, modified homework, detailed answer keys, 12 pages of unit notes for students who may require assistance, follow along worksheets, and many review games. The homework and lesson notes chronologically follow the PowerPoint slideshow. The answer keys and unit notes are great for support professionals. The activities and discussion questions in the slideshow are meaningful. The PowerPoint includes built-in instructions, visuals, and review questions. Also included are critical class notes (color coded red), project ideas, video links, and review games. This unit also includes four PowerPoint review games (110+ slides each with Answers), 38+ video links, lab handouts, activity sheets, rubrics, materials list, templates, guides, 6 PowerPoint review Game, and much more. Also included is a 190 slide first day of school PowerPoint presentation.
Areas of Focus within The Geology Topics Unit: -Plate Tectonics, Evidence for Plate Tectonics, Pangea, Energy Waves, Layers of the Earth, Heat Transfer, Types of Crust, Plate Boundaries, Hot Spots, Volcanoes, Positives and Negatives of Volcanoes, Types of Volcanoes, Parts of a Volcano, Magma, Types of Lava, Viscosity, Earthquakes, Faults, Folds, Seismograph, Richter Scale, Seismograph, Tsunami's, Rocks, Minerals, Crystals, Uses of Minerals, Types of Crystals, Physical Properties of Minerals, Rock Cycle, Common Igneous Rocks, Common Sedimentary Rocks, Common Metamorphic Rocks.
This unit aligns with the Next Generation Science Standards and with Common Core Standards for ELA and Literacy for Science and Technical Subjects. See preview for more information
If you have any questions please feel free to contact me. Thanks again and best wishes. Sincerely, Ryan Murphy M.Ed www.sciencepowerpoint@gmail.com
Universal Design is a design process - not a checklist of design solutions or mere compliance with legislation such as the Americans with Disabilities Act (ADA) or the Disability Discrimination Act (DDA).
Darwinism and natural selection 7th zol.pptximranrohi56
Darwin's three main principles of natural selection state that, in order for the process to occur, most characteristics in the population must be inherited, more offspring must be produced than can survive, and the fittest offspring must be more likely to survive and reproduce.In the mid-19th century, a man came up with a very powerful idea, the idea that species could change. Today, all the time, we hear about animals adapting, endangered species going extinct, viruses mutating. But in the 1800s, people conceptualized a much more static world. One man looked past all that. His name was Charles Darwin.
Darwin called his idea the theory of natural selection. Natural selection is defined as a natural process that results in the survival and reproduction of organisms with genetic traits best suited to their environment. A shorter (but no less accurate) definition might be "survival of the fittest." Within any population, the fittest individuals, or the ones who fit the environment best, usually survive and reproduce, passing on their genetic traits to future generations.
Honest Reviews of Tim Han LMA Course Program.pptxtimhan337
Personal development courses are widely available today, with each one promising life-changing outcomes. Tim Han’s Life Mastery Achievers (LMA) Course has drawn a lot of interest. In addition to offering my frank assessment of Success Insider’s LMA Course, this piece examines the course’s effects via a variety of Tim Han LMA course reviews and Success Insider comments.
Unit 8 - Information and Communication Technology (Paper I).pdfThiyagu K
This slides describes the basic concepts of ICT, basics of Email, Emerging Technology and Digital Initiatives in Education. This presentations aligns with the UGC Paper I syllabus.
Operation “Blue Star” is the only event in the history of Independent India where the state went into war with its own people. Even after about 40 years it is not clear if it was culmination of states anger over people of the region, a political game of power or start of dictatorial chapter in the democratic setup.
The people of Punjab felt alienated from main stream due to denial of their just demands during a long democratic struggle since independence. As it happen all over the word, it led to militant struggle with great loss of lives of military, police and civilian personnel. Killing of Indira Gandhi and massacre of innocent Sikhs in Delhi and other India cities was also associated with this movement.
The Roman Empire A Historical Colossus.pdfkaushalkr1407
The Roman Empire, a vast and enduring power, stands as one of history's most remarkable civilizations, leaving an indelible imprint on the world. It emerged from the Roman Republic, transitioning into an imperial powerhouse under the leadership of Augustus Caesar in 27 BCE. This transformation marked the beginning of an era defined by unprecedented territorial expansion, architectural marvels, and profound cultural influence.
The empire's roots lie in the city of Rome, founded, according to legend, by Romulus in 753 BCE. Over centuries, Rome evolved from a small settlement to a formidable republic, characterized by a complex political system with elected officials and checks on power. However, internal strife, class conflicts, and military ambitions paved the way for the end of the Republic. Julius Caesar’s dictatorship and subsequent assassination in 44 BCE created a power vacuum, leading to a civil war. Octavian, later Augustus, emerged victorious, heralding the Roman Empire’s birth.
Under Augustus, the empire experienced the Pax Romana, a 200-year period of relative peace and stability. Augustus reformed the military, established efficient administrative systems, and initiated grand construction projects. The empire's borders expanded, encompassing territories from Britain to Egypt and from Spain to the Euphrates. Roman legions, renowned for their discipline and engineering prowess, secured and maintained these vast territories, building roads, fortifications, and cities that facilitated control and integration.
The Roman Empire’s society was hierarchical, with a rigid class system. At the top were the patricians, wealthy elites who held significant political power. Below them were the plebeians, free citizens with limited political influence, and the vast numbers of slaves who formed the backbone of the economy. The family unit was central, governed by the paterfamilias, the male head who held absolute authority.
Culturally, the Romans were eclectic, absorbing and adapting elements from the civilizations they encountered, particularly the Greeks. Roman art, literature, and philosophy reflected this synthesis, creating a rich cultural tapestry. Latin, the Roman language, became the lingua franca of the Western world, influencing numerous modern languages.
Roman architecture and engineering achievements were monumental. They perfected the arch, vault, and dome, constructing enduring structures like the Colosseum, Pantheon, and aqueducts. These engineering marvels not only showcased Roman ingenuity but also served practical purposes, from public entertainment to water supply.
Macroeconomics- Movie Location
This will be used as part of your Personal Professional Portfolio once graded.
Objective:
Prepare a presentation or a paper using research, basic comparative analysis, data organization and application of economic information. You will make an informed assessment of an economic climate outside of the United States to accomplish an entertainment industry objective.
2. Biodiversity
• Coined by Edward Wilson in the 1980s
• It is the number and relative abundance of
species in a defined area
• It can be measured in terms of:
– 1. Species diversity
– 2. Habitat diversity
– 3. Genetic diversity
3. 1. Species Diversity
• The variety of species per unit area
• This is the number of species present and
their relative abundance
• Areas of high species diversity are usually
those undisturbed by humans
4. 2. Habitat Diversity
• The range of different habitats in an ecosystem
– Rainforest has a high habitat diversity
– Desert has a low habitat diversity
5. 3. Genetic Diversity
• The range of genetic material present in a
gene pool or population of a species
6. Plate Tectonics
• First suggested by geologist Alfred Wegener in
1912
• It refers to the movement of parts of the Earth’s
crust
• This led to populations of the same species
becoming isolated (over millions of years)
• Reproductive isolation under different conditions
provided a mechanism for speciation (in this case
allopatric)
• It explains why there are related species in
different parts of the world
9. 200 – 180 million years ago
Lauraisia
Gondwanaland
10. How does plate movement influence
speciation?
• May produce barriers
– Mountain ranges
– Rift valleys
– Oceans
• Movement of land masses apart can isolate species
• Land bridges may form and allow new waves of colonisation
• Movement of plates through new climatic zones creates new
habitats
• Subduction of plates sometimes destroys existing habitats
12. Evolution
Evolution is the slow, continual change of
organisms over a very long time. All living things
on the Earth have developed from the first
simple life forms that arrived 3,000,000,000
years ago.
One of the effects of evolution is that species will become better
adapted to their environment. If these species don’t adapt they
may become extinct due to being unable to deal with any of these
factors…
1) Increased competition
2) Changes in the environment
3) New diseases
4) New predators
13. Evolution
My key observations:
1) All living things produce more offspring
than survive to adulthood
2) In spite of this, population sizes remain
roughly constant
3) Variation exists among species
4) Characteristics can be passed on from
one generation to the next.
These observations led me to the
conclusion that species evolve over a
along period of time by a mechanism
called “Natural Selection”. The main
evidence for this is from fossil records.
14. Evolution
Mutations are changes in the structure of the DNA molecule. They can be passed on
to daughter cells through cell division. They will result in the wrong proteins being
produced.
Mutations can be caused by:
- Ionising radiation (UV, X-rays etc.)
- Radioactive substances
- Certain chemicals
Effects:
- Mostly harmful
- Causes death or abnormality in reproductive cells
- Causes cancer in body cells
- Some CAN be neutral or even beneficial (e.g. the peppered moth)
15. Natural Selection
1) Each species shows variation:
2) There is competition within each
species for food, living space, water,
mates etc.
4) These survivors will pass on their better
genes to their offspring who will also show
this beneficial variation.
Yum
3) The “better adapted” members of
these species are more likely to survive
– “Survival of the Fittest”
Get off
my land
Gutted!
16. A smaller example…
Consider the four steps of natural selection in the example of some
bacteria that have become resistant to penicillin (an antibiotic):
1) Variation – some strains of bacteria are
resistant and some aren’t.
2) Competition – The non-resistant bacteria
are killed by the penicillin.
3) Survival of the fittest – the resistant
bacteria survive.
4) Passing on of genes – the resistant
bacteria reproduce and pass on their
adaptations to their offspring.
Bacteria
Penicillin
17. Evolution is usually divergent (sometimes refered to as adaptive radiation). However,
occasionally unrelated species develop similar characteristics due to similar selection
pressures. We call this convergent evolution.
20. Ecosystem Stability and Disturbance
• After a disturbance, new habitat is recolonised:
– By swimming or floating
– By flying (birds, insects, seeds)
– By walking or ‘hitch-hiking’ on other animals
21. Ecosystem Stability and Disturbance
• Jump Dispersal
– Long distances travelled by one or few individuals over a
very short timescale
• Diffusion
– Slow spread of a population from the edge of a
disturbance into new habitat
• Secular migration
– Very slow spread (over thousands or millions of years) that
may involve species undergoing speciation as they move
22. Disturbance
• 3 factors determine how quickly an ecosystem
can recover from a disturbance:
– Inertia – resistance to alteration
– Resiliance – ability to recover
– Diversity – number and proportions of species
23. Disturbance
• Tropical rainforest
– High diversity
– High inertia
– Low resiliance (takes a long time to recover)
• Grassland
– Low diversity
– Low inertia
– High resiliance
Complex ecosystem therefore has
many ways to respond to
disturbances. However, soils thin and
low in nutrients, and eaily washed
away after disturbance
Fairly simple ecosystem. Thick soils
with lots of nutrients stored in them.
Recover fairly quickly after
disturbance
24. Succession
1. Pioneer Species colonise bare rock
2. Growth of these species cause changes in the
environment, soil is created
3. New species colonise soil and replace pioneers
4. Growth of root systems stabalise soil
5. Animals begin to colonise
6. A climax community is created
7. New disturbances result in new waves of succession
Primary
Succession
Secondary
Succession
Note that it is communities that succeed each other, not simply individual species
Each new community is called a sere. The final stable sere is called the climax community
25. Questions
1. Define species diversity, genetic diversity and habitat
diversity
2. Describe natural selection and artificial selection
3. List 3 different causes of reproductive isolation
4. Describe allopatric speciation and sympatric speciation?
5. Outline the movement of tectonic plates and how it has
contributed to species distribution
26. Questions
1. Give one example of how an ecosystem’s
ability to recover from a disturbance depends
on resiliance, diversity and inertia
2. In what ways does the complexity of an
ecosystem provide stability?
3. Outline the difference between primary and
secondary succession