Keep doing what you like good luck

1. z
AGRICULTURAL
BIOLOGY
RICHE LOU D. CASSION
Instructor I

2. ECOLOGY
 Gk., "Oikos"- house or place to
live
 Study of organism or groups of
organisms to their environment
 Study of the relationship of the
organism or groups of organisms
to their environment, or
the science of interrelationship
between the physical and
biological components of the
environments.

3. Four major
habitats:
 Freshwater
habitat is of two
types: 1) standing
water habitat
(swamp); 2)
running water
habitat (spring,
stream, brooks,
creeks, or rivers)

4. Four major habitats:
 Marine habitat refers to
the big body of water
called the sea. It covers
70% of the earth’s surface.
It is divided into 3:
mangrove, coral reef, and
sea grass community.

5. Four major habitats:
 Estuarine habitat is a semi-closed body of water which has a free connection
with the open sea. It is strongly affected by tidal action and within it sea water
is mixed with fresh water from land drainage. River mouth, enacted bays, tidal
marshes of bodies of water behind beach barriers are examples.

6. Four major habitats:
 Terrestrial
habitat
considered the
largest plant
biomass (living
weight found in an
ecosystem.

7. ECOSYSTEM
 Ecosystem- a geographic area where
plants, animals, and other
organisms, as well as weather and
landscape, work together to form a
bubble of life. Ecosystems contain biotic
or living, parts, as well as abiotic factors,
or nonliving parts. Biotic factors include
plants, animals, and other organisms.
 Producers- green plants
Photosynthesis- process plants use to
convert water and carbon dioxide into
food through the use of sunlight.

8. ECOSYSTEM
 Consumers- organisms who could not produce food
 Macro-consumer- hetero-trophic organisms who eat other organisms for
food
 Micro-consumer- decomposers which breakdown the complex
compounds and release inorganic substances
 Food chain- transfer of food/ energy
 Food web-several interacting food chains

9. Relationship in ecosystems:
 Commensalism- one organism benefits, the other is not affected
 Mutualism- both interacting organisms benefit
 Predation- organism feeds upon another organism (prey- attacked
and eaten, predator- attacks and eats)
 Parasitism- parasite benefited, host is harmed.
 Competition- two or more species attempting to use the resource
at the same time. Both species are harmed.

10. What is sustainable world order?