What is Population interaction and 9 types of population interaction amongst Species including predation,protocooperation, mutualism, commensalism, ammensalism,parasitism,neutralism,and competition for resources.
presentation contain different type of interactions, competition-intra and inter-specific, mechanism of competition-Exploitation and Interference, Mathematical models of Competition i.e. Hutchinson Ratio, Exponential Growth, Logistic Model, Lotka-Volterra Competition Model, Tilman's Resource Model, Results of Competition i.e. Range restriction, Competitive Displacement, Competitive Exclusion , Competitive Displacement Hypothesis, Ecological Niche, Evolution of new species, Factors Affecting Competition, Case studies
What is Population interaction and 9 types of population interaction amongst Species including predation,protocooperation, mutualism, commensalism, ammensalism,parasitism,neutralism,and competition for resources.
presentation contain different type of interactions, competition-intra and inter-specific, mechanism of competition-Exploitation and Interference, Mathematical models of Competition i.e. Hutchinson Ratio, Exponential Growth, Logistic Model, Lotka-Volterra Competition Model, Tilman's Resource Model, Results of Competition i.e. Range restriction, Competitive Displacement, Competitive Exclusion , Competitive Displacement Hypothesis, Ecological Niche, Evolution of new species, Factors Affecting Competition, Case studies
This slide includes information about caring behavior of animals over other animals.It help to increase your knowledge about that how an animals sacrifice his or her need to protect and care other animals.This content also include eamples of Altruism in our daily life .
Ecological Interactions - Mutualism, Commensalism & NeutralismRahul M. Prathap
Ecological interactions are the effects an organism have on another in an ecosystem. This slide describes Mutualism, Commensalism and Neutralism with examples.
you will learn about the primary and secondary productivity involved in ecosystem and about its types. it includes gross and net primary productivity also.
Predation: What would happen to all the energy fixed by
autotrophic organisms if the community has no animals to eat the
plants? You can think of predation as nature’s way of transferring
to higher trophic levels the energy fixed by plants. When we think
of predator and prey, most probably it is the tiger and the deer that
readily come to our mind, but a sparrow eating any seed is no less
a predator. Although animals eating plants are categorised
separately as herbivores
This slide includes information about caring behavior of animals over other animals.It help to increase your knowledge about that how an animals sacrifice his or her need to protect and care other animals.This content also include eamples of Altruism in our daily life .
Ecological Interactions - Mutualism, Commensalism & NeutralismRahul M. Prathap
Ecological interactions are the effects an organism have on another in an ecosystem. This slide describes Mutualism, Commensalism and Neutralism with examples.
you will learn about the primary and secondary productivity involved in ecosystem and about its types. it includes gross and net primary productivity also.
Predation: What would happen to all the energy fixed by
autotrophic organisms if the community has no animals to eat the
plants? You can think of predation as nature’s way of transferring
to higher trophic levels the energy fixed by plants. When we think
of predator and prey, most probably it is the tiger and the deer that
readily come to our mind, but a sparrow eating any seed is no less
a predator. Although animals eating plants are categorised
separately as herbivores
Mutualism describes an interaction that benefits both species. A well-known example exists in the mutualistic relationship between alga and fungus that form lichens. The photosynthesizing alga supplies the fungus with nutrients and gains protection in return. The relationship also allows lichen to colonize habitats inhospitable to either organism alone. In rare cases, mutualistic partners cheat. Some bees and birds receive food rewards without providing pollination services in exchange. These "nectar robbers" chew a hole at the base of the flower and miss contact with the reproductive structures.
Both species involved in the interaction are benefited. These interactions take place in three patterns:
Facultative mutualism – Species survive on their own under favorable conditions
Obligate mutualism – One species is dependent for survival on the other
Diffusive mutualism – One entity can live with multiple partners
These relationships have three purposes:
Defensive mutualism
Trophic mutualism
Dispersive mutualism
The five main forms of interaction between population are: 1. Mutualism 2. Commensalism 3. Parasitism 4. Competition 5. Predation.
Dr. K. Rama Rao
Govt. Degree College
TEKKALI; Srikakulam Dt. A. P
Phone: 9010705687
A presentation in college Ecology about population functions of organisms. Includes hierarchical framework of population, interspecific and intraspecific relationships.
Describe the major interactions among organisms in a food web.So.pdfeyezoneamritsar
Describe the major interactions among organisms in a food web.
Solution
major interactions among organisms in a food web
Food chains or food webs : they depict the eating connections amongst species and speak to the
stream of vitality through a biological community.The Sun gives vitality to producers , like ,
plants. Producers change over this energy into a shape that can be devoured by creatures.
Creatures that eat producers are then devoured by creatures at higher trophic levels. In the long
run all living beings are crushed spirit down into supplements by decomposers. Makers utilize
these supplements to change over sunlight based vitality into a usable frame and the natural way
of life proceeds. Evolved ways of life and nourishment networks portray connections between
life forms at various trophic levels.
Symbiosis: It is a collaboration between people of various organic species. No less than one of
the life forms gets an advantage from the collaboration. The other living being can either get an
advantage, be hurt, or not be influenced at all.
Commensalism : it includes a cozy relationship between the two life forms included. There are
three primary sorts of advantageous connections: commensalism, mutualism, and parasitism.
Commensalism : it is a sort of cooperative relationship where one of the life forms gets an
advantage and the other is not altogether hurt or aided by the connection. Frequently the life
form that is getting an advantage can either discover sustenance all the more effortlessly in view
of the association or is ensured by the other living being.
For instance, cows egrets eat creepy crawlies in fields and fields. Substantial nibbling herbivores,
for example, dairy cattle and stallions, mix up creepy crawlies as they munch on grass in fields.
Cows egrets regularly take after behind the munching herbivores and gobble the creepy crawlies
that are mixed up. The steers egret is getting the advantage of having the capacity to discover
nourishment effortlessly. The touching herbivores are not influenced by the nearness of the
egrets. This is a case of commensalism.
Mutualism: it is a sort of harmonious relationship in which both life forms included get an
advantage. Blossoms and their pollinators are a standout amongst the most widely recognized
types of mutualism. Plants can\'t repeat without being pollinated. Numerous sorts of plants rely
on upon creepy crawlies, for example, moths, honey bees, wasps, and scarabs, to perform
fertilization. Plants that depend on pollinators pull in the pollinator by the shape, shading, or
possess an aroma similar to their blossoms. The pollinator gets nectar or dust as a nourishment
source from the blossom. As the pollinator gets the sustenance, it gets dust on its legs and body
that can be spread to another plant. When it visits a moment plant of similar species, the dust
from the principal plant is exchanged to the regenerative organs of the second plant and
fertilization can happen. Both crea.
INTERACTIONS :Interaction is relationship between two organisms.
Also called as BIOLOGICAL OR ECOLOGICAL INTERACTIONS.
In a ecosystem, living (biotic) things have to interact with one another as well as with non -living components of their environment.
All the vital process of living such as growth, nutrition & reproduction requires such interactions between individuals in same species or between species.
The interaction between organisms may not be always beneficial to all the interacting counter parts. Based on whether, the interaction is beneficial to both interacting species or harmful to at least one interaction species, the ecological of biological interactions are classified into two categories.
It can BENEFIT an organisms
It can HARM an organisms
It can NO EFFECT an organisms
POSTIVE INTERACTIONS
In positive interactions, the interacting populations help one another.
The positive interaction may be in one way or reciprocal.
The benefit may be in respect of food, shelter, substratum or transportation.
The positive association may be continuous, transitory, obligate or facultative.
The two interacting partners may be in close contact in such a way that the tissues intermixed with each other; or they may live within a specific area of the other; or attached to its surface.
NEGATIVE INTERACTIONS
In negative interactions, one of the interacting populations is benefited and the other is harmed.
In negative interaction one population may eat members of the other population, compete for foods or excrete harmful wasters.
SYMBIOTIC RELATIONSHIP
Such relationship between living organisms when they live in close association of each other is called as SYMBIOTIC RELATIONSHIP
Mutualism, also called as symbiosis, is also a positive type of ecological interaction.
Mutualism is a symbiotic association between two organisms in which both the interacting partners are mutually benefitted.
Mutualism is different from proto-cooperation in the sense that mutualism is obligatory and none of the partners of mutualism can survive individually.
In mutualism, the organisms enter into some sort of physical and physiological exchange
Multi-source connectivity as the driver of solar wind variability in the heli...Sérgio Sacani
The ambient solar wind that flls the heliosphere originates from multiple
sources in the solar corona and is highly structured. It is often described
as high-speed, relatively homogeneous, plasma streams from coronal
holes and slow-speed, highly variable, streams whose source regions are
under debate. A key goal of ESA/NASA’s Solar Orbiter mission is to identify
solar wind sources and understand what drives the complexity seen in the
heliosphere. By combining magnetic feld modelling and spectroscopic
techniques with high-resolution observations and measurements, we show
that the solar wind variability detected in situ by Solar Orbiter in March
2022 is driven by spatio-temporal changes in the magnetic connectivity to
multiple sources in the solar atmosphere. The magnetic feld footpoints
connected to the spacecraft moved from the boundaries of a coronal hole
to one active region (12961) and then across to another region (12957). This
is refected in the in situ measurements, which show the transition from fast
to highly Alfvénic then to slow solar wind that is disrupted by the arrival of
a coronal mass ejection. Our results describe solar wind variability at 0.5 au
but are applicable to near-Earth observatories.
This pdf is about the Schizophrenia.
For more details visit on YouTube; @SELF-EXPLANATORY;
https://www.youtube.com/channel/UCAiarMZDNhe1A3Rnpr_WkzA/videos
Thanks...!
Seminar of U.V. Spectroscopy by SAMIR PANDASAMIR PANDA
Spectroscopy is a branch of science dealing the study of interaction of electromagnetic radiation with matter.
Ultraviolet-visible spectroscopy refers to absorption spectroscopy or reflect spectroscopy in the UV-VIS spectral region.
Ultraviolet-visible spectroscopy is an analytical method that can measure the amount of light received by the analyte.
Cancer cell metabolism: special Reference to Lactate PathwayAADYARAJPANDEY1
Normal Cell Metabolism:
Cellular respiration describes the series of steps that cells use to break down sugar and other chemicals to get the energy we need to function.
Energy is stored in the bonds of glucose and when glucose is broken down, much of that energy is released.
Cell utilize energy in the form of ATP.
The first step of respiration is called glycolysis. In a series of steps, glycolysis breaks glucose into two smaller molecules - a chemical called pyruvate. A small amount of ATP is formed during this process.
Most healthy cells continue the breakdown in a second process, called the Kreb's cycle. The Kreb's cycle allows cells to “burn” the pyruvates made in glycolysis to get more ATP.
The last step in the breakdown of glucose is called oxidative phosphorylation (Ox-Phos).
It takes place in specialized cell structures called mitochondria. This process produces a large amount of ATP. Importantly, cells need oxygen to complete oxidative phosphorylation.
If a cell completes only glycolysis, only 2 molecules of ATP are made per glucose. However, if the cell completes the entire respiration process (glycolysis - Kreb's - oxidative phosphorylation), about 36 molecules of ATP are created, giving it much more energy to use.
IN CANCER CELL:
Unlike healthy cells that "burn" the entire molecule of sugar to capture a large amount of energy as ATP, cancer cells are wasteful.
Cancer cells only partially break down sugar molecules. They overuse the first step of respiration, glycolysis. They frequently do not complete the second step, oxidative phosphorylation.
This results in only 2 molecules of ATP per each glucose molecule instead of the 36 or so ATPs healthy cells gain. As a result, cancer cells need to use a lot more sugar molecules to get enough energy to survive.
Unlike healthy cells that "burn" the entire molecule of sugar to capture a large amount of energy as ATP, cancer cells are wasteful.
Cancer cells only partially break down sugar molecules. They overuse the first step of respiration, glycolysis. They frequently do not complete the second step, oxidative phosphorylation.
This results in only 2 molecules of ATP per each glucose molecule instead of the 36 or so ATPs healthy cells gain. As a result, cancer cells need to use a lot more sugar molecules to get enough energy to survive.
introduction to WARBERG PHENOMENA:
WARBURG EFFECT Usually, cancer cells are highly glycolytic (glucose addiction) and take up more glucose than do normal cells from outside.
Otto Heinrich Warburg (; 8 October 1883 – 1 August 1970) In 1931 was awarded the Nobel Prize in Physiology for his "discovery of the nature and mode of action of the respiratory enzyme.
WARNBURG EFFECT : cancer cells under aerobic (well-oxygenated) conditions to metabolize glucose to lactate (aerobic glycolysis) is known as the Warburg effect. Warburg made the observation that tumor slices consume glucose and secrete lactate at a higher rate than normal tissues.
Nutraceutical market, scope and growth: Herbal drug technologyLokesh Patil
As consumer awareness of health and wellness rises, the nutraceutical market—which includes goods like functional meals, drinks, and dietary supplements that provide health advantages beyond basic nutrition—is growing significantly. As healthcare expenses rise, the population ages, and people want natural and preventative health solutions more and more, this industry is increasing quickly. Further driving market expansion are product formulation innovations and the use of cutting-edge technology for customized nutrition. With its worldwide reach, the nutraceutical industry is expected to keep growing and provide significant chances for research and investment in a number of categories, including vitamins, minerals, probiotics, and herbal supplements.
THE IMPORTANCE OF MARTIAN ATMOSPHERE SAMPLE RETURN.Sérgio Sacani
The return of a sample of near-surface atmosphere from Mars would facilitate answers to several first-order science questions surrounding the formation and evolution of the planet. One of the important aspects of terrestrial planet formation in general is the role that primary atmospheres played in influencing the chemistry and structure of the planets and their antecedents. Studies of the martian atmosphere can be used to investigate the role of a primary atmosphere in its history. Atmosphere samples would also inform our understanding of the near-surface chemistry of the planet, and ultimately the prospects for life. High-precision isotopic analyses of constituent gases are needed to address these questions, requiring that the analyses are made on returned samples rather than in situ.
Introduction:
RNA interference (RNAi) or Post-Transcriptional Gene Silencing (PTGS) is an important biological process for modulating eukaryotic gene expression.
It is highly conserved process of posttranscriptional gene silencing by which double stranded RNA (dsRNA) causes sequence-specific degradation of mRNA sequences.
dsRNA-induced gene silencing (RNAi) is reported in a wide range of eukaryotes ranging from worms, insects, mammals and plants.
This process mediates resistance to both endogenous parasitic and exogenous pathogenic nucleic acids, and regulates the expression of protein-coding genes.
What are small ncRNAs?
micro RNA (miRNA)
short interfering RNA (siRNA)
Properties of small non-coding RNA:
Involved in silencing mRNA transcripts.
Called “small” because they are usually only about 21-24 nucleotides long.
Synthesized by first cutting up longer precursor sequences (like the 61nt one that Lee discovered).
Silence an mRNA by base pairing with some sequence on the mRNA.
Discovery of siRNA?
The first small RNA:
In 1993 Rosalind Lee (Victor Ambros lab) was studying a non- coding gene in C. elegans, lin-4, that was involved in silencing of another gene, lin-14, at the appropriate time in the
development of the worm C. elegans.
Two small transcripts of lin-4 (22nt and 61nt) were found to be complementary to a sequence in the 3' UTR of lin-14.
Because lin-4 encoded no protein, she deduced that it must be these transcripts that are causing the silencing by RNA-RNA interactions.
Types of RNAi ( non coding RNA)
MiRNA
Length (23-25 nt)
Trans acting
Binds with target MRNA in mismatch
Translation inhibition
Si RNA
Length 21 nt.
Cis acting
Bind with target Mrna in perfect complementary sequence
Piwi-RNA
Length ; 25 to 36 nt.
Expressed in Germ Cells
Regulates trnasposomes activity
MECHANISM OF RNAI:
First the double-stranded RNA teams up with a protein complex named Dicer, which cuts the long RNA into short pieces.
Then another protein complex called RISC (RNA-induced silencing complex) discards one of the two RNA strands.
The RISC-docked, single-stranded RNA then pairs with the homologous mRNA and destroys it.
THE RISC COMPLEX:
RISC is large(>500kD) RNA multi- protein Binding complex which triggers MRNA degradation in response to MRNA
Unwinding of double stranded Si RNA by ATP independent Helicase
Active component of RISC is Ago proteins( ENDONUCLEASE) which cleave target MRNA.
DICER: endonuclease (RNase Family III)
Argonaute: Central Component of the RNA-Induced Silencing Complex (RISC)
One strand of the dsRNA produced by Dicer is retained in the RISC complex in association with Argonaute
ARGONAUTE PROTEIN :
1.PAZ(PIWI/Argonaute/ Zwille)- Recognition of target MRNA
2.PIWI (p-element induced wimpy Testis)- breaks Phosphodiester bond of mRNA.)RNAse H activity.
MiRNA:
The Double-stranded RNAs are naturally produced in eukaryotic cells during development, and they have a key role in regulating gene expression .
1. CONTENTS
Q. What is population interaction?
* Its types:
1.Mutualism
2.Competition
3.Predation
4.Parasitism
5.Commensalism
6.Ammensalism
7.Proto Co-operation
Observation in our localities
Reference
2. Q. What is Population Interaction? Write its
types.
Ans.: A population is defined as a group of individuals
of the same species. The interrelationship between
the individuals in an ecosystem is termed population
interaction. The organisms in an interaction are most
likely to be influenced by each other either positively,
negatively, or neutral.
Types of Population Interaction
The interactions have been observed between the
individuals of a population or between the two or
more populations of different species. Also, these
interactions can be either beneficial, harmful, or
neutral to both or any of the interacting species.
Based on these parameters, different types of
population interactions can be mapped as follows:
Species
A
Species
B
Types of Interaction
+ + Mutualism
- - Competition
+ - Predation
+ - Parasitism
+ 0 Commensalism
3. - 0 Ammensalism
+ + Proto Co-operation
Mutualism
When the two different population species interact in
such a manner that it is beneficial to each other, then
this form of interaction is called mutualism. Lichens
are a classic example of mutualism in between fungi
and algae. Even plants and animals show good
mutualism.
Plants need some agents for pollination and seed
dispersal. And these agents are the animals. Animals,
in turn, are rewarded with the nectar or the fruits of
the plants. But, even in mutualism, there are some
cheater species, which may not reward the other
species. This leads to co-evolution of the species.
4. Example-Mycorrihiza (It is a mutualistic relationship
between fungi and plant ).
Competition
When the closely related species fight for limited
resources, there is a competition between the
species. These types of interactions are called
competition. This fight for resources can occur
between diverse groups of the population also.
Competition can occur even when there is an
unlimited supply of resources. Here, it depends on the
superiority of one species over the other. In the
presence of one population species, the other
population species may not use the resources
effectively. But if the dominant species is removed,
then the other species will use the resources to their
full capacity.
5. Predation
This interaction is a very important one as it ensures
that there is stability in the ecosystem. The two main
populations interacting in predation are the predators
and the prey.
Without the predators, the prey population will go
out of control. The species diversity in a community is
also maintained by the predators. They reduce the
intensity of the competition between prey species.
The prey species have also evolved several
mechanisms to lessen the impact of predation.
Parasitism
This is an interaction of populations where a parasitic
mode of nutrition is clearly seen, with one species
being completely dependent on the other host
species for all its meals/ nutrient requirements.
6. Parasitism is clearly seen in many taxonomic groups,
right from plants to higher vertebrates.
Commensalism
In this kind of integration, one species population
benefits from the other species population. But the
other species population does not benefit nor is it
harmed in any way. If you have been to rural areas,
you have seen many birds perching on cattle. This is a
good example of commensalism.
7. Here the cattle do not benefit anything nor cause any
harm. But as the cattle moves, they stir up the small
insects hiding in the grass. It is these insects that the
birds feed on, thereby benefiting to large extent.
Amensalism
In this kind of interaction between populations, one
population finds itself in harm while the other is
unaffected. A good example for amensalism could be
a condition where the wider and taller plants inhibit
the growth of the nearby smaller plants. A few plants
secrete some substances which inhibit the growth of
the plants growing nearby. They may also kill them
out rightly to remove the competition.
Proto Co-operation
Protocooperation is a type of ecological interaction
where both the species involved in the interaction are
benefitted, but the interaction is not obligatory for
survival.
8. The interaction between species in
protocooperation is simply for the gain they
receive from the interaction. The interaction is
often considered a type of mutualism (facultative
mutualism).
Even though the interaction increases the
chances of survival and supports growth, it is not
necessary for the general growth and survival of
the species.
Protocooperation is a type of mutualism as the
interaction benefits all the species involved.
Observation of some interaction in our
localities
The dog is classic example of a domestic animal
that likely travelled a commensal pathway into
domestication
9. Pollination in which nectar or pollen are traded
for pollen dispersal or ant protection of aphids,
where the aphids trade sugar rich honeydew in
return for defence against predators such as
ladybugs.
Common clownfish in their ritteri sea anemone
hone .Both the fish and anemone benefit from
this relationship , a case of mutualistic symbiosis.
Cheetahs and lions since both species feed on
similar prey , they are negatively impacted by the
presence of the other because they will have less
food, however they still persist together.
REFERENCE
NCERT Textbook CLASS 12th
Biology Today (mtg publication)
Biological Science (Cambridge edition).