Ecosystem – Biomass,Succession

1. Ecosystem – Biomass,
Succession
Ankit sharda
Roll no 6602
Dav college Hoshiarpur

2. Definition of
ecosystem
and biomass
Types and cases
Important and main
causes
Here you could describe
the topic of the section
Introduction
Biotic or Ecological
Succession
Pyramid Of Number
Social Media
Table of Contents
01 02
03 04

3. Introduction
Definition (Ecosystem) –
An ecosystem is a geographic area where plants
,animals and other organisms as well as weather
,work together .
Ecosystem contain biotic or living ,parts as well as
biotic factors or non – living parts .
Ecosystem can be very large or small .

4. Biomass -Biomass in an ecosystem is the mass or weight of
living tissue, which is commonly subdivided into five
fundamental trophic levels forming the basic food
chain:
1. producers, which are green photosynthesizing
plants
2. herbivores, which eat producers
3. predators, which eat herbivores
4 . top predators, which eat predators
5. decomposers, which break down dead tissue of
all five group
Decomposer
top
Predators
Predators
Herbivores
Producer

5. Pyramid Of Number
It is a graphical representation of the number of individual per unit area of various
tropical level stepwise with producer being kept at the base and the top
carnivores kept at the tip.
There are three types of ecological pyramids
1. Number 2. biomass 3. energy

6. Cases

7. 1.Erect shaped Pyramid
2.Inverted shaped
Pyramid
3.Spindle shaped pyramid

8. 3.Biotic or Ecological
Succession
Natural development of a series of biotic
communities at the same site, one after the other
The representation is show in next page so that
1. First community – Pioneer community
2. Last community – climax community
3. The distance between the first and last
community is transition community seral
community

9. The Slide Title Goes Here!

10. 1.The distance between
the first and last
community is transition
community seral
community
1.Last community – climax
community
First community –
Pioneer community
Sere also know as First community
,transition community and last
community
Hydrosere
A hydrosere is a plant succession which
occur in a area of fresh water body such
as pond, lakes and marshes.
Xerarch Succession
Xerarch Succession: Plant succession
starting on bare ground or rock and
culminating in a mature climax forest.

11. Important and Main causes
Ecological succession is important for the growth and development of an ecosystem
It initiates colonization of new areas and recolonization of the areas that had been
destroyed due to certain biotic and climatic factors.
Thus, the organisms can adapt to the changes and learn to survive in a changing
environment.
Main Causes
The main causes of ecological succession include the biotic and climatic factors that
can destroy the populations of an area.
Wind
fire
soil erosion
natural disasters include the climatic factors

12. Questions
1.What is meant by ecological succession ?
2. What are seral communities?
3. Differentiate between Pioneer communities and Climax communities
4. What is the ecological succession of bare rocktechnically called?
5. How is the ecological succession in a waterbody technically called?

13. Answers
1. Ecological Succession is the process of change in the species structure of an
ecological community over a period of time.
2. The distance between the first and last community is transition community seral
community
3. First community – Pioneer community .Last community – climax community
4. Xerarch Succession: Plant succession starting on bare ground or rock and culminating
in a mature climax forest
5. A hydrosere is a plant succession which occur in a area of fresh water body such as
pond, lakes and marshes.

14. Thank you
Any Question
ankitsharda18@gmail.com (email)
Agro learning (Ankit sharda) (youtube channel )