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l ecturer of ecology discipline postgraduate student at the Department of “Road

Ecosystems function by maintaining a flow of energy and a cycling of materials through a series of steps of eating and being eaten, of utilization and conversion, called the food chain.

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Слайд 1lecturer of ecology discipline
postgraduate student at the Department of “Road

transport” of Nizhny Novgorod State Technical University
Contacts:
603950, Russia, Nizhny Novgorod,

Minin st., 24, of.1161
phone: +7 905 668 11 98 e-mail: kuzmin1anton@mail.ru

Anton N KUZMIN

lecturer of ecology disciplinepostgraduate student at the Department of “Road transport” of Nizhny Novgorod State Technical UniversityContacts:603950,

Слайд 2Ecosystems function by maintaining a flow of energy and a

cycling of materials through a series of steps of eating

and being eaten, of utilization and conversion, called the food chain.
The structure of an ecosystem is essentially a description of an environment’s organisms and physical features.

Ecology

2. Energy use and material cycling in ecosystems

Ecosystems function by maintaining a flow of energy and a cycling of materials through a series of

Слайд 3There are 6 major components in an ecosystem:
1. inorganic substances
2.

organic compounds
3. climate, temperature, wind, light and rain which affect

all the processes in an ecosystem

Ecology

2. Energy use and material cycling in ecosystems

There are 6 major components in an ecosystem:1. inorganic substances2. organic compounds3. climate, temperature, wind, light and

Слайд 44. producers;
green plants which are able to manufacture food

from simple inorganic substance in the process known photosynthesis.

Ecology
2. Energy

use and material cycling in ecosystems
4. producers; green plants which are able to manufacture food from simple inorganic substance in the process

Слайд 5Photosynthesis is a process used by plants and other organisms to

convert light energy into chemical energy that can later be

released to fuel the organisms' activities.

Ecology

2. Energy use and material cycling in ecosystems

Photosynthesis is a process used by plants and other organisms to convert light energy into chemical energy that

Слайд 65. consumers;
Primary consumers: they obtain their energy, from green

plants. But secondary consumers such as dogs and cats feed

on other animals.
There are three groups of consumers: primary consumers, secondary consumers and tertiary consumers.

Ecology

2. Energy use and material cycling in ecosystems

5. consumers; Primary consumers: they obtain their energy, from green plants. But secondary consumers such as dogs

Слайд 76. decomposers, such as bacteria and fungi.
Bacteria break down

the flesh of dead animals. Fungi break down plant material.

They enable chemical substances to return to the physical environment.

Ecology

2. Energy use and material cycling in ecosystems

6. decomposers, such as bacteria and fungi. Bacteria break down the flesh of dead animals. Fungi break

Слайд 8Ecosystems tend toward maturity, or stability, and in doing so

they pass from a less complex to a more complex

state. This directional change is called succession.
Ecological succession is a series of progressive changes in the species that make up a community over time.

Ecology

2. Energy use and material cycling in ecosystems

Ecosystems tend toward maturity, or stability, and in doing so they pass from a less complex to

Слайд 9Ecologists usually identify two types of succession, which differ in

their starting points:
In primary succession, newly exposed or newly formed rock

is colonized by living things for the first time.
Primary succession occurs when new land is formed or bare rock is exposed, providing a habitat that can be colonized for the first time.

Ecology

2. Energy use and material cycling in ecosystems

Ecologists usually identify two types of succession, which differ in their starting points:In primary succession, newly exposed or

Слайд 10In secondary succession, an area previously occupied by living things is disturbed—disrupted,

then recolonized following the disturbance.
The community begins with relatively few

pioneering plants and animals and develops through increasing complexity until it becomes stable or self-perpetuating as a climax community.
In secondary succession, an area previously occupied by living things is disturbed—disrupted, then recolonized following the disturbance.The community begins

Слайд 11The path and endpoint of succession:
The early ecologists, who first

studied succession thought of it as a predictable process in

which a community always went through the same series of stages. They also thought that the end result of succession was a stable, unchanging final state called a climax community, largely determined by an area's climate.

Ecology

2. Energy use and material cycling in ecosystems

The path and endpoint of succession:The early ecologists, who first studied succession thought of it as a

Слайд 1215 minute break
(please, come back on time)

15 minute break(please, come back on time)

Слайд 13The main processes in ecosystems include:
1) food chains
2) materials cycles
3)

development
4) evolution
Ecology
2. Energy use and material cycling in ecosystems

The main processes in ecosystems include:1) food chains2) materials cycles3) development4) evolutionEcology2. Energy use and material cycling

Слайд 14Food chains. The Sun's energy travels through an ecosystem.
The proper

transfer of energy through an ecosystem by the producers, the

consumers and the decomposers is called a food chain.

Ecology

2. Energy use and material cycling in ecosystems

Food chains. The Sun's energy travels through an ecosystem.The proper transfer of energy through an ecosystem by

Слайд 15Materials Cycles. Materials cycles include cycles of nitrogen, carbon, oxygen,

water and mineral salts. Chemical substances move from the non-living

environment to living things. They are then returned to the environment.

Ecology

2. Energy use and material cycling in ecosystems

Materials Cycles. Materials cycles include cycles of nitrogen, carbon, oxygen, water and mineral salts. Chemical substances move

Слайд 16Development. An ecosystem exists in a state of equilibrium.
It can

support a certain number of plants and animals of different

species. If the population of one animal increased, there would not be enough food and water for all the animals. Consequently, some would die. In this way the ecosystem regulates itself and returns to its state of equilibrium.

Ecology

2. Energy use and material cycling in ecosystems

Development. An ecosystem exists in a state of equilibrium.It can support a certain number of plants and

Слайд 17Ecosystems are not static - they change all the time.

Plants and animals are able to adapt to changes in

the physical environment. For instance, if a human destroyed the vegetation in a region, there would be certain changes. First grass and some flowers would grow. Then insects would appear. The wind would blow the seeds of small trees. These trees would grow and birds and animals would appear.

Ecology

2. Energy use and material cycling in ecosystems

Ecosystems are not static - they change all the time. Plants and animals are able to adapt

Слайд 18Evolution. During long periods of time ecosystems evolve.
The evolution of

an ecosystem is caused by factors inside and outside it.

Consider the evolution of the atmosphere: when life began there was no oxygen in the atmosphere.

Ecology

2. Energy use and material cycling in ecosystems

Evolution. During long periods of time ecosystems evolve.The evolution of an ecosystem is caused by factors inside

Слайд 19Consequently, the Sun's rays prevented life from developing on land.

The first living organisms developed under the sea. After the

evolution of photosynthesis, the oxygen in the atmosphere increased and life expanded.

Ecology

2. Energy use and material cycling in ecosystems

Consequently, the Sun's rays prevented life from developing on land. The first living organisms developed under the

Слайд 20As the oxygen in the atmosphere increased, a layer of

ozone was formed; life would be impossible without it on

the surface of the Earth. Today life on the Earth is in danger: man himself might destroy the equilibrium of ecosystem by pollution, extinction of wildlife and unreasonable utilization of the globe's material resource.

Ecology

2. Energy use and material cycling in ecosystems

As the oxygen in the atmosphere increased, a layer of ozone was formed; life would be impossible

Слайд 21Thank you for your attention!
Contacts:
603950, Russia, Nizhny Novgorod, Minin st.,

24, of.1161
phone: +7 905 668 11 98 e-mail: kuzmin1anton@mail.ru
Anton

N KUZMIN

Thank you for your attention!Contacts:603950, Russia, Nizhny Novgorod, Minin st., 24, of.1161phone: +7 905 668 11 98

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