CHAPTER 3 : BIOSPHERE and the ECOSYSTEM Flashcards
___ is a single, living
thing and can be an animal, a
plant, or a microorganism, grow and respond to
their environment.
organism
examples of organism
cells
tissues
organ
organ system
organism
human
The term we use to describe
multiple individuals or organisms
of a single species that live within
a particular geographic area.
Population
The term used to describe two or
more populations of different
species that occupy the same
space at the same time.
Community
The term used to describe both
the biotic (living) and abiotic
(nonliving) factors in a system
ecosystem
•The term used to describe organisms
that occupy a certain area and are determined by the
primary vegetation type, the climate
of the area, and the geographic
location.
Biome
The term used to describe the
combination of every ecosystem
on the planet and includes all living
beings and their relationships.
Biosphere
Earth is our ___
Biosphere
• The term ___ was first coined by A.G.Tansley, an English botanist, in 1935.
•Life is sustained by the interactions of many organisms functioning together, interacting
through their physical and chemical environments.
• It is the functional unit of biosphere where the living organisms interact with
each other and the surrounding environment.
Ecosystem
3 types of ecosystem
Terrestrial ecosystem
Aquatic ecosystems
Ecosystem services
This type of ecosystem are exclusively land-based ecosystems.
Terrestrial Ecosystem
different types of terrestrial ecosystems
Forest Ecosystems
Grassland Ecosystems
Tundra Ecosystems
Desert Ecosystem
•Consists of several plants, animals and microorganisms that live in coordination with
the abiotic factors of the environment.
•Forests help in maintaining the temperature of the earth and are the major carbon
sink.
Forest Ecosystem
The classification is as per the respective climate
boreal, temperate or tropical
in temperate zones may have a flora of coniferous type,
deciduous type or a combination of both the types
forest ecosystems
in the tropics have the most diverse plant and animal
ecosystem than any other region on the earth. Here, trees grow tall and foliage
is dense and lush with a warm and humid environment, with species right from
the root level up till the canopy
rainforest ecosystems
___ are featured in the far north, with a rich population of the
coniferous trees, known as the taiga.
Boreal forests
The vegetation is dominated by grasses and herbs
Grassland ecosystem
examples of grassland ecosystems
Temperate grasslands, savanna grasslands
Temperate grasslands, savanna grasslands are found in savannas, steppes, and prairies, in the temperate and tropical regions.
They can exist in colder regions as well (Siberian Steppe) and
share a common characteristic: ___
semi-aridity
may be scattered along with the grass but trees are
almost non- existent. Grasslands are ideal for animal-grazing
flowers
___ ecosystems are devoid of trees and are found in cold
climates or where rainfall is scarce.
These are covered with snow for most of the year.
Tundra ecosystem
___ are found throughout the world. These are regions with very
little rainfall. The days are hot and the nights are cold.
The most defining feature of this ecosystem is the amount of
precipitation it receives, which is the least as compared to any
ecosystem.
Desert
organisms that can be found in the desert
rocks, sand dunes, flora is very rare
but highly adaptive animal species, and insects
