Target Exam

CUET

Subject

Biology

Chapter

Environmental Issues

Question:

Identify the wrong pair from the following -

Options:

Jhum cultivation - Slash and burn agriculture

Joint forest Management - Protecting forests along with local communities

Biomagnification - Increase in concentration of toxicants in successive trophic levels

FOAM Farmers of Arcata Marsh

Correct Answer:

FOAM Farmers of Arcata Marsh

Explanation:

The correct answer is Option (4) → FOAM Farmers of Arcata Marsh

The marshes also constitute a sanctuary, with a high level of biodiversity in the form of fishes, animals and birds that now reside there. A citizens group called Friends of the Arcata Marsh (FOAM) are responsible for the upkeep and safeguarding of this wonderful project. 

Slash and burn agriculture, commonly called as Jhum cultivation in the north-eastern states of India, has also contributed to deforestation. In slash and burn agriculture, the farmers cut down the trees of the forest and burn the plant remains. The ash is used as a fertiliser and the land is then used for farming or cattle grazing. After cultivation, the area is left for several years so as to allow its recovery. The farmers then move on to other areas and repeat this process.

Realising the significance of participation by local communities, the Government of India in 1980s has introduced the concept of Joint Forest Management (JFM) so as to work closely with the local communities for protecting and managing forests.

Biomagnification refers to increase in concentration of the toxicant at successive trophic levels. This happens because a toxic substance accumulated by an organism cannot be metabolised or excreted, and is thus passed on to the next higher trophic level. This phenomenon is well- known for mercury and DDT.