UPSC Static Quiz – Environment : 8 June 2026

Solution: D

• Alpha Diversity (A) is the measure of biodiversity within a specific, relatively homogeneous area or community. It is simply the count of species (species richness) found in that particular habitat. For example, the number of tree species in a specific forest patch. This matches with description 3.
• Beta Diversity (B) measures the difference or turnover in species composition between two different habitats or communities. It quantifies how much the species composition changes as one moves from one ecosystem to another. A high beta diversity indicates that the species composition varies significantly between the two areas. This matches with description 1.
• Gamma Diversity (C) refers to the total biodiversity over a large geographical area or landscape that includes multiple ecosystems. It is a function of both the alpha diversity of the individual communities and the beta diversity between them. For example, the total number of bird species in an entire mountain range. This matches with description 4.
• Genetic Diversity (D) refers to the variation at the genetic level within a single species. This includes variations among individuals in a population and between different populations of the same species. The example of thousands of genetically different strains of rice or varieties of mango in India is a classic illustration of genetic diversity. This matches with description 2.

Solution: B

• Statement 1 is correct. Sacred Groves are a classic example of in-situ conservation based on cultural and religious beliefs. They are patches of forests, ranging from a few trees to several acres, that are communally protected. These groves are dedicated to a local deity or ancestral spirit, and cultural taboos and social norms prevent activities like hunting or logging within them. This community-driven protection has helped preserve pockets of rich, often pristine, biodiversity.
• Statement 2 is incorrect. While Sacred Groves are abundantly found along the Western Ghats (in states like Kerala and Karnataka) and in North-East India (e.g., Meghalaya), they are not exclusive to these regions. They are found all over India, including in Rajasthan (e.g., Orans), Himachal Pradesh, and central Indian states. The practice of protecting forest patches based on spiritual beliefs is widespread across different cultures and geographical regions of the country.
• Statement 3 is incorrect. Sacred Groves are protected primarily through informal social and religious traditions, not formal legal statutes. While some Sacred Groves might be located within or be declared as a Community Reserve, it is not an automatic or universal legal status for all groves. The ‘Community Reserve’ is a formal legal category under the WPA, 1972, which requires a formal notification process involving the state government and the consent of the community. Most Sacred Groves exist outside this formal legal framework, relying on traditional governance.

Solution: C

• Statement 1 is correct. In-situ conservation (protecting species in their natural habitat, e.g., National Parks, Sanctuaries) is considered a more holistic approach. It aims to conserve the entire ecosystem, including all its interdependent species and their complex interactions, rather than focusing on a single species.
• Statement 2 is correct. This statement provides the core reason why in-situ conservation is more holistic. By protecting the entire habitat, it safeguards not just the target species but also countless other organisms (plants, insects, microbes) that form the ecosystem. Crucially, it allows species to continue to adapt and evolve within their natural environment, facing natural selection pressures. In contrast, ex-situ methods (e.g., zoos, botanical gardens) typically focus on a limited number of threatened species, removing them from their ecological context and halting their natural evolutionary trajectory.
• Statement 3 is correct. For species whose populations have crashed to critically low levels in the wild (or are extinct in the wild), ex-situ conservation through captive breeding helps to prevent their complete extinction. This demonstrates that ex-situ is a targeted, emergency measure for individual species, which contrasts with the broader, ecosystem-level approach of in-situ conservation.

Solution: C

• Statement 1 is correct. Project Snow Leopard was launched in 2009 with the primary objective of conserving the species and its fragile habitat. A key feature of its strategy is the adoption of a participatory, landscape-based approach, which moves beyond the confines of Protected Areas to manage the entire ecosystem in collaboration with local communities who share the snow leopard’s range.
• Statement 2 is correct. The project’s geographical scope covers the high-altitude regions of the Indian Himalayas where the snow leopard is found. This includes the five Himalayan states: Jammu and Kashmir (now UTs of J&K and Ladakh), Himachal Pradesh, Uttarakhand, Sikkim, and Arunachal Pradesh.
• Statement 3 is incorrect. While the snow leopard is listed in Schedule I of the Wildlife (Protection) Act, 1972, affording it the highest degree of legal protection in India, its status on the IUCN Red List is ‘Vulnerable’, not ‘Critically Endangered’. It was downlisted from ‘Endangered’ to ‘Vulnerable’ in 2017 after a reassessment of population numbers across its range.

Solution: C

• The term ‘The Evil Quartet’ is a mnemonic used to categorize the four main human-caused (anthropogenic) drivers of biodiversity loss and species extinction across the globe. These four causes are:
  1. Habitat Loss and Fragmentation: This is considered the most significant cause of extinction. It includes deforestation for agriculture, urbanization, and infrastructure development, which destroys or breaks up the natural habitats of species.
  2. Over-exploitation: This refers to the harvesting of species from the wild at rates faster than natural populations can recover. It includes overfishing, overhunting, and excessive logging.
  3. Alien Species Invasions: The introduction of non-native species into an ecosystem can disrupt local food webs, outcompete native species for resources, and introduce diseases, often leading to the decline or extinction of indigenous species.
  4. Co-extinctions: This refers to the secondary extinction of a species as a direct result of the extinction of another species with which it was interdependent. For example, the extinction of a host plant can lead to the extinction of the insects that exclusively feed on it.