Biodiversity is
defined as the variety of plant, animal, fungi and microorganisms
in the world or communities Or in a particular habitat.
Most people recognize biodiversity
by species—a group of individual living organisms that can
interbreed. Examples of species include blue
whales, white-tailed deer, striped tigers, white pine trees,
sunflowers, cactus plant and even microscopic bacteria and also we
humans.
Types of biodiversity
-
- Genetic biodiversity
- Species biodiversity
- Ecological biodiversity
Genetic biodiversity : genetic
information is shared more between the two similar species. For
example. All organisms share same nucleic acid, some have RNA and
others have DNA.
Species diversity : variety of
species in a particular habitat. For example, tropical North and
South America has about 85,000 flowering plant species, tropical
and subtropical Asia has more than 50,000 and tropical and
subtropical Africa has about 35,000.
Ecological diversity : An ecosystem
consists of organisms from many different species living together
in a region and their connections through the flow of energy,
nutrients and matter. Energy is produced by plants (Autotrophs) and
energy flow occurs when these plants are eaten up by animals which
are eaten by others. At last fungi decomposes and obtain it's
energy.
why is biodiversity
important ? What are benefits? Why should be preserve
it?
- boosts ecosystem productivity
- Species diversity ensures natural
sustainability to all life forms
- Provide us with natural
resources
- Provide biological resources such
as medicines, food, ornamental plants, wood product
- Provide ecological services such as
Protection of water resources, Soils formation and protection,
Nutrient storage and recycling, Pollution breakdown and absorption,
Contribution to climate stability
- Provide Social benefits, such as
Research, education and monitoring, Recreation and tourism,
Cultural values.
- Allows ecosystems to adjust with
disturbances like fires and floods.
- Genetic diversity even prevents
diseases and helps species adjust to changes in their
environment
Threats to biodiversity
:
- commercial and Resedential
development
- Agricultural and farming
activities
- Energy production and mining
- Biological resource usage like
fishing, hunting and wood harvesting
- transportation & service
corridors
- Overexploaitation of natural
resources
- Recreational or illegal activities
by humans
- Natural system modifications
- Pollution such as household sewage
& urban wastewater, industrial & military effluents,
garbage and solid waste.
- Climate change such as
- changes in precipitation & hydrological, geological,
temperature, and weather events.
- catastrophic geological events like
eathquake, tsunamis, avalanches, landslides, & volcanic
eruptions and gas leakage.
- invasive & problematic species,
pathogens & genes