The document discusses biodiversity at three hierarchical levels - genetic, species, and ecological diversity. It provides examples of genetic diversity within different species. Species diversity depends on the number and richness of species in a region. Ecological diversity refers to diversity at the ecosystem level, like rainforests and mangroves. Tropical regions generally have higher biodiversity than temperate regions. Species diversity increases with area up to a limit, following a logarithmic relationship. The document outlines threats to biodiversity from habitat loss, overexploitation, invasive species, and co-extinctions.
Very useful for pre university students and those are seriously preparing for CET,AIIMS and NEET exams. Please give your valuable feedback or leave a message. you find it informative like it and share it
Very useful for pre university students and those are seriously preparing for CET,AIIMS and NEET exams. Please give your valuable feedback or leave a message. you find it informative like it and share it
Very useful for pre university students and those are seriously preparing for CET,AIIMS and NEET exams. Please give your valuable feedback or leave a message. you find it informative like it and share it
Very useful for pre university students and those are seriously preparing for CET,AIIMS and NEET exams. Please give your valuable feedback or leave a message. you find it informative like it and share it
Hotspots of biodiversity—areas particularly rich in species, rare species,
threatened species, or some combination of these attributes—are increasingly
being delineated to help set priorities for conservation. Only recently have we
begun to test key assumptions that determine how useful a hotspot approach
can be for conservation planning. The evidence suggests that although at large
geographic scales hotspots do provide useful information for conservation
planning, at smaller scales their value may be more limited.
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 knows no political boundaries and its conservation is therefore a collective responsibility of all nations. The historic Convention on Biological Diversity (‘The Earth Summit’) held in Rio de Janeiro in 1992, called upon all nations to take appropriate measures for conservation of biodiversity and sustainable utilisation of its benefits. In a follow-up, the World Summit on Sustainable Development held in 2002 in Johannesburg, South Africa, 190 countries pledged their commitment to achieve by 2010, a significant reduction in the current rate of biodiversity loss at global, regional and local levels
Species diversity introduction, types and importance, examples of species diversity, threats and conservation to species diversity, Biodiversity conservation.
M.SC (BOTANY) 2nd Year
Hotspots of biodiversity—areas particularly rich in species, rare species,
threatened species, or some combination of these attributes—are increasingly
being delineated to help set priorities for conservation. Only recently have we
begun to test key assumptions that determine how useful a hotspot approach
can be for conservation planning. The evidence suggests that although at large
geographic scales hotspots do provide useful information for conservation
planning, at smaller scales their value may be more limited.
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 knows no political boundaries and its conservation is therefore a collective responsibility of all nations. The historic Convention on Biological Diversity (‘The Earth Summit’) held in Rio de Janeiro in 1992, called upon all nations to take appropriate measures for conservation of biodiversity and sustainable utilisation of its benefits. In a follow-up, the World Summit on Sustainable Development held in 2002 in Johannesburg, South Africa, 190 countries pledged their commitment to achieve by 2010, a significant reduction in the current rate of biodiversity loss at global, regional and local levels
Species diversity introduction, types and importance, examples of species diversity, threats and conservation to species diversity, Biodiversity conservation.
M.SC (BOTANY) 2nd Year
Levelwise PageRank with Loop-Based Dead End Handling Strategy : SHORT REPORT ...Subhajit Sahu
Abstract — Levelwise PageRank is an alternative method of PageRank computation which decomposes the input graph into a directed acyclic block-graph of strongly connected components, and processes them in topological order, one level at a time. This enables calculation for ranks in a distributed fashion without per-iteration communication, unlike the standard method where all vertices are processed in each iteration. It however comes with a precondition of the absence of dead ends in the input graph. Here, the native non-distributed performance of Levelwise PageRank was compared against Monolithic PageRank on a CPU as well as a GPU. To ensure a fair comparison, Monolithic PageRank was also performed on a graph where vertices were split by components. Results indicate that Levelwise PageRank is about as fast as Monolithic PageRank on the CPU, but quite a bit slower on the GPU. Slowdown on the GPU is likely caused by a large submission of small workloads, and expected to be non-issue when the computation is performed on massive graphs.
Opendatabay - Open Data Marketplace.pptxOpendatabay
Opendatabay.com unlocks the power of data for everyone. Open Data Marketplace fosters a collaborative hub for data enthusiasts to explore, share, and contribute to a vast collection of datasets.
First ever open hub for data enthusiasts to collaborate and innovate. A platform to explore, share, and contribute to a vast collection of datasets. Through robust quality control and innovative technologies like blockchain verification, opendatabay ensures the authenticity and reliability of datasets, empowering users to make data-driven decisions with confidence. Leverage cutting-edge AI technologies to enhance the data exploration, analysis, and discovery experience.
From intelligent search and recommendations to automated data productisation and quotation, Opendatabay AI-driven features streamline the data workflow. Finding the data you need shouldn't be a complex. Opendatabay simplifies the data acquisition process with an intuitive interface and robust search tools. Effortlessly explore, discover, and access the data you need, allowing you to focus on extracting valuable insights. Opendatabay breaks new ground with a dedicated, AI-generated, synthetic datasets.
Leverage these privacy-preserving datasets for training and testing AI models without compromising sensitive information. Opendatabay prioritizes transparency by providing detailed metadata, provenance information, and usage guidelines for each dataset, ensuring users have a comprehensive understanding of the data they're working with. By leveraging a powerful combination of distributed ledger technology and rigorous third-party audits Opendatabay ensures the authenticity and reliability of every dataset. Security is at the core of Opendatabay. Marketplace implements stringent security measures, including encryption, access controls, and regular vulnerability assessments, to safeguard your data and protect your privacy.
As Europe's leading economic powerhouse and the fourth-largest hashtag#economy globally, Germany stands at the forefront of innovation and industrial might. Renowned for its precision engineering and high-tech sectors, Germany's economic structure is heavily supported by a robust service industry, accounting for approximately 68% of its GDP. This economic clout and strategic geopolitical stance position Germany as a focal point in the global cyber threat landscape.
In the face of escalating global tensions, particularly those emanating from geopolitical disputes with nations like hashtag#Russia and hashtag#China, hashtag#Germany has witnessed a significant uptick in targeted cyber operations. Our analysis indicates a marked increase in hashtag#cyberattack sophistication aimed at critical infrastructure and key industrial sectors. These attacks range from ransomware campaigns to hashtag#AdvancedPersistentThreats (hashtag#APTs), threatening national security and business integrity.
🔑 Key findings include:
🔍 Increased frequency and complexity of cyber threats.
🔍 Escalation of state-sponsored and criminally motivated cyber operations.
🔍 Active dark web exchanges of malicious tools and tactics.
Our comprehensive report delves into these challenges, using a blend of open-source and proprietary data collection techniques. By monitoring activity on critical networks and analyzing attack patterns, our team provides a detailed overview of the threats facing German entities.
This report aims to equip stakeholders across public and private sectors with the knowledge to enhance their defensive strategies, reduce exposure to cyber risks, and reinforce Germany's resilience against cyber threats.
2. The term ‘Biodiversity’ was
introduced by an American
Biologist Edward Wilson.
Biodiversity refers to the variety
of life forms and habitats found
in a defined area.
It represents the totality of
genes, species and ecosystem
of a given region.
3. The biological diversity includes three inter-related
hierarchical levels :
Biological
Diversity
Genetic
Diversity
Species
Diversity
Ecological
Diversity
4. GENETIC DIVERSITY
The genetic variation existing within a species is called
genetic diversity.
The variation may be in alleles, total genes or
chromosome structures.
Number of genes in the followings:
Mycoplasma :450-700
Escherichia coli :4000
Drosophila melanogaster :13000
Oryza sativa :32000-50000
Homo sapiens :35000-45000
5. SPECIES DIVERSITY
The diversity at the species level is called
species diversity.
Example:- The Western Ghats have a greater
amphibian species diversity than Eastern
Ghats.
The species diversity depends upon the number
and richness of the species of a region.
Species richness - The number of species per
unit area.
6. ECOLOGICAL DIVERSITY
The diversity at the ecosystem
level is called ecological diversity.
Example: Deserts, rain forests,
mangroves, coral reefs,
wetlands, estuary and alpine
meadows etc.
8. According to the IUCN (2004) report, the total
number of plant and animal species is more than 1.5
million.
Robert May estimated that the global species
diversity is at about 7 million.
More than 70 per cent of all the species recorded
are animals and plants including algae, fungi,
bryophytes, gymnosperms and angiosperms
comprise about 22 per cent of the total.
9. Among animals, insects are making up more than 70 per
cent of the total. Out of every 10 animals on this planet, 7
are insects.
The number of fungi species in the world is more than the
combined total of the species of fishes, amphibians,
reptiles and mammals.
India has only 2.4 per cent of the world’s land area, but
shares 8.1 per cent of the global species diversity .
India is one of the 12 mega diversity countries of the
world.
11. Biodiversity is not uniform throughout the
world but shows uneven distribution.
Biodiversity is affected by two factors:
1. Latitudinal Gradient
2. Species- area relationship
12. • In general, species diversity decreases as we move
away from the equator towards the poles.
• Few exceptions: tropics (latitudinal range of 23.5° N
to 23.5° S) harbour more species than temperate or
polar areas.
• Colombia located near the equator has nearly
1,400 species of birds while New York at 41° N has
105 species and Greenland at 71° N only 56
species.
• India, with much of its land area in the tropical
latitudes, has more than 1,200 species of birds.
14. Amazon Rain
Forest
The largely tropical Amazonian rain
forest in South America has the
greatest biodiversity on earth- it is
home to more than 40,000 species of
plants, 3,000 of fishes, 1,300 of birds,
427 of mammals, 427 of amphibians,
378 of reptiles and of more than
1,25,000 invertebrates.
15. GREATER BIOLOGICAL DIVERSITY IN TROPICS
Various hypotheses for higher diversity in tropics proposed
by ecologists and evolutionary biologists are :
(i) Temperate regions have undergone frequent glaciations
in the past. It killed most the species. Tropical latitudes
have remained relatively undisturbed for millions of
years.
(ii) Tropical environments are less seasonal which promote
niche specialization and lead to a greater species
diversity.
(iii) More solar energy is available in the tropics which
contributes to higher productivity and in turn might
contribute indirectly to greater diversity.
16. SPECIES-AREA RELATIONSHIPS
Alexander von Humboldt
was a German naturalist and explorer.
He observed that within a region
species richness increased with
increasing explored area, but only up to
a limit.
The relation between species
richness and area for a wide variety of
taxa is to be a rectangular hyperbola.
17. SPECIES-AREA RELATIONSHIPS
On a logarithmic scale, the
relationship is a straight line
described by the equation:
log S = log C + Z log A
where
S= Species richness
A= Area
Z = slope of the line
(regression coefficient)
C = Y-intercept
18. IMPORTANCE OF SPECIES DIVERSITY
TO THE ECOSYSTEM
Stability
Productivity
Ecosystem Health
19. Due to human activities biological resources have
been declining rapidly.
The colonisation of tropical Pacific Islands by humans
led to the extinction of more than 2,000 species of
native birds.
More than 15,500 species are facing the threat of
extinction in the worldwide.
At present,12 per cent of birds, 23 per cent of
mammals, 32 per cent of amphibians and 31per cent
of gymnosperms face the threat of extinction.
21. MASS EXTINCTION
Due to natural calamities a large number of species
become extinct which is called mass extinction.
Since the origin and diversification of life on earth
there were five episodes of mass extinction of species.
The "Big Five" mass extinctions are as follows:
1. End Ordovician (Ordovician-Silurian extinction)
2. Late Devonian (Late Devonian extinction)
3. End Permian (Permian-Triassic extinction)
4. End Triassic (Triassic-Jurassic extinction)
5. End Cretaceous (Cretaceous-Tertiary extinction)
22. The ‘Sixth Extinction’ is presently in progress which
is different from the previous episodes.
The current species extinction rates are to be 100
to 1,000 times faster than in the pre-human times
and human activities are responsible for the faster
rates.
Ecologists warn that if the present trends continue,
nearly half of all the species on earth might be
wiped out within the next 100 years.
23. • Decline in plant production
1
• Lowered resistance to
environmental
perturbations such as
drought
2
• Increased variability in
certain ecosystem
processes such as plant
productivity, water use, and
pest and disease cycles
3
24. Causes of Biodiversity Loss
Habitat loss and
fragmentation
Over-
exploitation
Alien species
invasions
Co-extinctions
25. Destruction of habitat is the primary cause of extinction
of species.
The tropical rainforests initially covered 14% of land
but now only 6%.
The Amazon rain forest is called ‘‘The lungs of the
planet’’.
When large sized habitats are broken into small
fragmented due to human activities certain animals are
badly affected and threatens their survival.
26. When natural
resources are over
exploited by human
due to his greed,it
results the
degradation and
extinction of the
resources.
e.g. Steller’s sea cow,
passenger pigeon.
27. African Cichild Fish
The introduction of Nile perch into lake Victoria
led extinction of more than 200 species of
indigenous cichild fish.
Nile Perch
28. Alien species invasion
The recent illegal
introduction of the
African catfish
Clarias gariepinus
is posing threat to
indigenous
catfishes in India.
30. When a species become extinct, the plant and
animal species associated with it in an obligatory
manner, also become extinct.
For example, if the host fish species becomes
extinct, all those parasites exclusively found on it
will also become extinct.
33. Ecosystem services
Amazon forest
produce 20%
of the total
oxygen in the
atmosphere on
earth.
Pollination of
plants through
pollinators:
bee, birds and
bats.
Aesthetic
pleasures of
walking
through thick
woods,
watching
spring flowers
etc.
34. There are millions of plants,
animals and microbes on this
earth with whom we share.
Each species on this earth has
some intrinsic value.
It is therefore our moral duty
to take care of all the living
creatures and pass on our
biological legacy in good
order to future generations.
35.
36. 1. Conservation and
protection of whole
ecosystem, protection of
its biodiversity at all levels.
2. Eg. Biosphere reserves,
National parks, wildlife
sanctuaries, Sacred
groves
1. Protection of animals or
plants when they are in
endangered or threatened
and needs urgent
measures to save from
extinction.
2. Eg. Zoological parks,
botanical gardens and
wildlife safari
In situ conservation Ex situ conservation
37. The Earth Summit held in Rio de Janeiro in 1992.
The World Summit on Sustainable Development
held in Johannesburg, South Africa in 2002 .
In this Summit, 190 countries pledged their
commitment to reduce the current rate of
biodiversity loss at global, regional and local levels
by 2010.