Biodiversity and Conservation BIOLOGY - Biodiversity and Conservation

When was the world summit on sustainable development held in Johannesburg, South Africa?

Example of a hotspot is:

An example of biodiversity conservation in situ.

On a logarithmic scale the relationship shows straight line which is represented by the following equation.

Total Biodiversity hotspot in world are:

Introduction of the African catfish _________ for aquaculture purposes in our rivers.

When one species gets extinct, the others animals and plant species dependent on that species also begin to extinct in obligatory way. It is called _________.###The phenomenon of extinction of a species, the others animals and plant species dependent on that species also begin to extinct in obligatory manner is called_________.

In year 1992 there had been organised _________ on biodiversity at in Brazil.

Of the 4 regions of loss of biodiversity, _________ is the most important reason.

In tropical climate, _________ are the reasons of high biodiversity of plant and animals.

What is ex situ conservation?

Name the three important components of biodiversity.

Abington tortoises became extinct within a decade after goats were introduced to the Galapagos Islands. Explain the statement with reasons.

(a) Write an example of a virus biocontrol agent.
(b) Why are they considered desirable for the treatment of an ecologically sensitive area?

Define biodiversity.

Explain In-situ conservation by giving an example.

Can you think of a situation where we deliberately want to make a species extinct? How would you justify it?

“Biodiversity improves the health of crop plants.” Explain the statement with reasons.

Biodiversity in living beings started about 3 billion years ago. Since then, new species are emerging on the earth and at the same time, their mass extinction is also taking place.
(a) How many phenomena of mass extinction have occurred on Earth and which extinction is in progress at present?
(b) How is the current phenomenon of extinction different from earlier occurrences and explain why.

“The stability of a community depends on its prosperity.” How did David Tilman demonstrate it experimentally?

Clarify any two reasons of loss of biodiversity.

The species diversity of plants (22 per cent) is much less than that of animals (72 per cent). What could be the explanations to how animals achieved greater diversification?

Among the ecosystem services are control of floods and soil erosion. How is this achieved by the biotic components of the ecosystem?

What are sacred groves? What is their role in conservation?

What is the significance of the slope of regression in a species-area relationship?

Define species-area relationship pattern of biodiversity in detail.

How is biodiversity important for ecosystem functioning?

What are the major causes of species losses in a geographical region?

Give three hypotheses for explaining why tropics show greatest level of species richness.

How do ecologists estimate the total number of species present in the world?