The document provides an overview of ecosystems, defining them as systems comprising biotic (living) and abiotic (non-living) components. It details the roles of producers, consumers, and decomposers within ecosystems, alongside descriptions of various components, including climatic, organic, and inorganic factors. Additionally, it touches on concepts such as ecological succession, illustrating the progressive changes in species composition over time.

1. Unit iii
Ecosystem
BY_ Mr. Bhom Singh Rathore
(Nursing Tutor)
Seedling School of Nursing ,JNU Jaipur

3. Any unit which includes the organism,their interaction with the
Phusical environment ,energy flow,material exchange Between
(ii)
Living and Non living components within system is Known as
Ecosystem.

4. &
Decomposers
& Decomposers

5. Structure of Ecosystem
There are two components of the Ecosystem _
• Biotic components
•Living things within an ecosystem, such as plants, animals, fungi, bacteria,
and protists
*Abiotic Components
•Non-living components of an ecosystem, such as water, soil, air, sunlight,
temperature,
• .

6. The three types of biotic components in an ecosystem are
producers, consumers, and decomposers.
•Producers
•Also known as Autotrophs, these organisms create their own food using energy and inorganic
materials. Examples include Green plants and green algae.
By Photosynthesis.
These are of Two Kinds
(A)Photoautotroph_
these are mainly the green plants ,which can synthesis their own food by making
use of inorganic elements like Co2 and Water in the presence of sun light.
6Co2+H20________________________C6H12 O6 + 6O2
Glucose is the organic food prepared by plants which is useful for performing metabolic activities .
As the green plants prepare their own food with the help of #Sunlight & #Chlorophyl
These are called as PHOTOAUTOTROPHS.
(B)Chemoautotroph
Some bacteria like Sulphur bacteria ,iron bacteria capture energy released during
inorganic chemical reactions and prepare organic foodby process called chemosynthesis and these
are called chemoautotroph
Biotic Components
Sunlght
Chlorophyli

7. Consumers
consumers are organisms in an
ecosystem that eat other organisms to
gain energy and survive:
 Herbivores: Also known as primary consumers,
 these consumers eat producers, such as plants or
 algae. Examples include deer, grasshoppers, and
 squirrels.
 Carnivores: These consumers eat other animals for
 energy. Examples include alligators and
 cougars. Also known as Secondary consumers.
 Omnivores: These consumers eat both plants and
 animals. Examples include raccoons.

9. Abiotic Components
Abiotic components of an ecosystem are non-living factors
that can be classified into three categories:
•Climatic factors: These include light, temperature, soil ,
atmospheric humidity, and wind,rainfall ,
•Organic factors: These include
carbohydrates ,Lipids ,Nucleic acid ,proteins some of the
organic substances present in organism which upon death
are broken down by Decomposers in to Organic substances
for their cycle.
•
•Inorganic factors: These include carbon ,Nitrogen,
phosphorus , oxygene ,calcium and their compounds

23. Eagle)

38. B.s. rathore

57. Northern Coniferous Forest (Tiaga)

59. Mediterranean Forests

61. Tropical grass land

63. Temperate Deciduos grassland

67. Aquatic Ecosystem
Phytoplankto
ns
Macrophyt
os

73. River Ecosystem

78. ECOLOGICAL SUCCESSION _
The Progressive Changes in the Species
Composition of an Ecosystem
is Called Ecological Succession

87. Lichen Stage
Moss Stage
Herb Stage
Shrub Stage
Tree Stage

100. THANK YOU