IGNOU BEVAE-181 Solved Assignment Cover 2024

IGNOU BEVAE-181 Solved Assignment 2024 | B.Sc (G) CBCS AECC

Solved By – Hemashree Dutta – Master of Arts (MA) in English Literature – Delhi University


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IGNOU BEVAE-181 Assignment Question Paper 2024



  1. Why ecological significance of forest is more important in present day context? Explain.
  2. Answer the following questions in about 125 words each.
    a) Explain the characteristics of Western Ghats for inclusion as Biodiversity hotspots.
    b) Why hydropower is regarded as the best source of energy? Explain it in detail.
    c) The importance of Biomass has been increasing day by day in our surroundings among renewable resources. Explain it with suitable examples.
    d) How does air pollution affect the atmospheric processes?
    e) What is Disposal of waste? Why segregation of waste is needed?
  3. Explain the human-environment relationship by taking examples of biotic and abiotic components?
  4. "As humans civilisation progressed, man started altering the environment in the pursuit of creating an economic, social and cultural environment of his own choice. This slowly resulted in the depletion of natural resources and degradation of environment." Explain it in context of national legislations of water acts?
  5. "Biosphere reserves are internationally recognised areas established to promote and demonstrate a balanced relationship between Humans and the Biosphere." Elaborate this statement in the context of conservation of nature?
Answer the following questions in about 150 words each.
  1. Explain the following terms in about 60 words each:
    (a) Seed Bank
    (b) Incineration
    (c) Biological Oxygen Demand
    (d) Public Health
  2. Answer the following questions in about 150 words each.
    a) What is lentic and lotic ecosystem? Explain these two with suitable examples.
b) What is ecological succession? Explain the types of succession with suitable diagrams.
c) Explain the biocentrism and ecocentrism in context of human’s attitude towards nature?
d) Define natural calamities and its types with suitable examples.
3. Explain the causes of ozone depletion? How do ultraviolet rays affects human health, animals, plants, micro-organisms, water and air quality.
4. "Education for environmental awareness is essential for the younger generation as well as for the older generation." Explain the statement with suitable examples.
5. "Water Harvesting is one of the effective measures to combat drought." Explain this statement with suitable arguments.

BEVAE-181 Sample Solution 2024



BEVAE-181 Solved Assignment 2024
  1. Why ecological significance of forest is more important in present day context? Explain.
1. Introduction
Forests have always been vital components of our planet, serving as the lungs of the Earth, providing habitat for countless species, and playing a crucial role in regulating the global climate. However, in the present-day context, their ecological significance has become even more critical. This article will explore the reasons why forests’ ecological importance has heightened in recent years.
2. Biodiversity Conservation
Forests are among the most biodiverse ecosystems on Earth, housing an astonishing array of plant and animal species. In today’s world, where biodiversity is under threat due to habitat destruction, pollution, and climate change, forests have taken on a heightened importance as sanctuaries for many endangered and vulnerable species. They serve as refuges, providing food, shelter, and breeding grounds for countless organisms, from insects to large mammals.
The loss of biodiversity has profound ecological consequences, including disrupting food chains, reducing ecosystem stability, and limiting the ability of ecosystems to adapt to changing conditions. Thus, the conservation of forests is paramount to protecting and preserving the Earth’s biodiversity.
3. Climate Regulation
Forests play a vital role in regulating the Earth’s climate, and this role has become increasingly significant in the face of global climate change. Forests act as carbon sinks, absorbing and storing large amounts of carbon dioxide (CO2) from the atmosphere. This helps mitigate the greenhouse effect, which is the primary driver of global warming.
In recent years, the urgency of addressing climate change has grown exponentially. Rising temperatures, more frequent extreme weather events, and sea-level rise are some of the alarming consequences of climate change that threaten ecosystems, communities, and economies worldwide. Forests have become an essential tool in mitigating these impacts by sequestering carbon and stabilizing the climate.
4. Carbon Sequestration
Forests store vast amounts of carbon in their trees, soil, and vegetation. When forests are cut down or degraded, this stored carbon is released into the atmosphere as CO2, contributing to the greenhouse effect and exacerbating climate change. In the present-day context, the importance of carbon sequestration by forests has become a central focus of efforts to combat climate change.
With the growing awareness of the need to reduce carbon emissions and transition to a low-carbon economy, forests have emerged as a critical natural solution. They not only capture carbon but also offer the potential for sustainable timber and biomass production, providing alternative materials and energy sources that can replace fossil fuels and reduce carbon emissions.
5. Air and Water Quality
Forests contribute significantly to improving air and water quality. Trees absorb air pollutants such as nitrogen oxides, sulfur dioxide, and ozone, which can have harmful effects on human health and the environment. In urban areas, forests act as green lungs, filtering out pollutants and providing clean, fresh air.
Moreover, forests play a vital role in water purification. They help regulate the flow of water in watersheds, reducing the risk of flooding and erosion. Forests also act as natural filters, removing impurities from water as it percolates through the soil. This purification process is crucial for providing clean drinking water to both rural and urban populations.
In today’s world, where air pollution and water contamination are significant public health concerns, the ecological services provided by forests have gained even greater importance.
6. Erosion Control and Soil Health
Forests are instrumental in preventing soil erosion, particularly in hilly or mountainous regions. The intricate root systems of trees and the forest floor’s organic matter help bind soil particles together, stabilizing slopes and reducing the risk of landslides and erosion. This erosion control is vital for safeguarding agricultural lands and maintaining soil fertility.
Additionally, forests enhance soil health by contributing organic matter and nutrients to the soil through leaf litter and decomposing plant material. This natural process enhances the productivity of adjacent agricultural lands and sustains ecosystems that rely on healthy soils.
In the present-day context, with increasing pressures on agriculture and the need to ensure food security for a growing global population, the role of forests in soil conservation and maintenance has never been more critical.
7. Water Cycle Regulation
Forests are essential components of the Earth’s water cycle. They influence precipitation patterns, capture moisture from the atmosphere, and release it slowly into rivers and streams. This regulation of the water cycle is crucial for maintaining freshwater availability in ecosystems and for human use.
Climate change has brought about shifts in precipitation patterns, leading to more frequent droughts and water scarcity in many regions. Forests help mitigate these effects by acting as natural water reservoirs, ensuring a steady flow of freshwater into rivers and aquifers. This water storage function is particularly valuable in arid and semi-arid regions.
8. Ecotourism and Recreation
Forests offer significant economic benefits through ecotourism and recreational opportunities. As urbanization continues to increase, people are increasingly seeking natural spaces for leisure and relaxation. Forests provide an escape from the stresses of modern life, offering opportunities for hiking, camping, birdwatching, and more.
Ecotourism, which revolves around responsible travel to natural areas, contributes to local economies by creating jobs and generating revenue for communities. In many cases, the preservation and sustainable management of forests are essential for maintaining these recreational and economic opportunities.
9. Medicinal Plants and Traditional Knowledge
Forests are treasure troves of biodiversity, including many plant species with medicinal properties. Indigenous and local communities have relied on forests for generations to obtain traditional medicines and remedies. As modern medicine continues to explore natural sources for drug development, forests have taken on added importance as potential sources of new pharmaceuticals and treatments.
The protection of forests is not only vital for conserving these valuable plant species but also for preserving the traditional knowledge of indigenous and local communities regarding the use of these plants for healing purposes. This knowledge is an essential part of cultural heritage and can offer valuable insights into sustainable resource management.
10. Conclusion
In conclusion, the ecological significance of forests in the present-day context cannot be overstated. Forests play a crucial role in biodiversity conservation, climate regulation, carbon sequestration, air and water quality, erosion control, soil health, water cycle regulation, ecotourism, and the preservation of traditional knowledge. As the world faces unprecedented challenges related to biodiversity loss, climate change, pollution, and sustainable resource management, forests have emerged as indispensable allies in our efforts to protect the planet and secure a better future for generations to come. It is imperative that we recognize the value of forests, prioritize their conservation and sustainable management, and take collective action to ensure their continued ecological significance.

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