Bba part

BBA Part1_1 (Gajaseni, 2001) 1

Man and EnvironmentAsst. Dr. Nantana

Gajaseni<[email protected]>

BBA Part1_1 (Gajaseni, 2001)2

What is environment?

� Q. What is environment?� A. It depends!

� Q. Depends on what?� A. Depends on "Environment

of whom?"


� Q. How about “environment of human”?

� A.Wait and see!


� Q. Who is "human"?� A. Wait until the next section!

� Q. Is human a living object?� A. ?

BBA Part1_1 (Gajaseni, 2001)5The human animal


� Q 1. What is living object?

� Q 2. What are differences

between living and non-living

objects?


� A. From biological perspective:

� Life = biosystems organized by

interactions between biological

components interacting with physical

environments, and become a unified

whole with capacity to maintain

homeostasis and self-perpetuation


Sign of life

� 1. Highly complex organization = all other characteristics of life emerge from an organism’s complex organization


� 2. Self-homeostasis =

Self-maintenance of a

steady-state internal

environment in the

variations of external

environment.


� 3. Self-perpetuation

= Life comes only from life.




� 4. Growth and development = the increment of volume and changes in structure and functions to suit with new form of life



Insert larva picture


� 5. Interactions = Life needs energy and matter utilization for maintenance of life




6. Adaptation = Life evolve as a result of the interaction between organisms and their environments



� 7. Response = Life adjusts itself to the environment.





� From biological perspective, these are biological spectrum

� Biotic components


รูป biotic component

Cell

Gene

Organ

Organism

Populations

Communities


Biotic components cannot survive in isolation.

They must interact with physical

or a biotic environments.


Generalized diagram of inputs, throughputs, and outputs in a system

System Throughputs (flows)

System InputsSystem Outputs

Information

Energy

Matter

Useless information

Waste heat

Waste matter


Interaction between each biotic

level with physical environment

through energy, matter, and

information produces

characteristic functional system.

"Biosystem" or "life"


Organizational hierarchy in nature

can be seen from "universe"

down to "subatomic particles".


รูป solar system

Milky way

Galaxy

Universe

Solar system

Earth


The natural world is organized,

diverse, dynamic, and yet

complex.


Q. How can life be seen in nature?

A. A hierarchy of

organization of matter.


Fig 3-6


Then, there is hierarchy

of biosystems.


Q. What is the determinant of life?

A. Environment by

evolutionary processes.


Fig 20’


� Q. How did life emerge on the Earth?


Fig 8-11 (21’)


Transparency 78

Fig 6-5 summary of the evolution of the earth and its life.

Chemical evolution

1 billion years

Biological evolution3.7 billion

years


Q. Is human a hierarchy of organization of matter?


Q. What is the difference of

“interaction between man and

environment” and “interaction

between other organisms and e

nvironment”?



� A. Organisms adapt themselves

to the environments.

� While

“Human modify environments to

suit themselves ”.


Human environment

2 groups


� 1. Natural environment: 4 spheres

� 1.1 Biosphere = Space occupied by life

� 1.2 Atmosphere = Space occupied by air

� 1.3 Lithosphere = Space occupied by solid

� 1.4 Hydrosphere = Space occupied by

water


How do the 4 spheres really exist?


Atmosphere

HydrosphereLithosphere

Ecosphere

Biosphere


2. Man-made environment

� 2.1 Anthropogenic ecosystems

� 2.2 Physical structures


What are the Functions of Natural Environment?

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