Biodiversity and Habitat Conservation Quiz
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Questions and Answers

What is habitat destruction defined as?

Habitat destruction is defined as the complete elimination of a localized or regional ecosystem leading to the total loss of its former biological function.

Name two factors that can cause habitat destruction.

Over-population, deforestation, pollution and global warning.

What is habitat fragmentation?

It occurs when remaining populations are isolated because the links between habitat patches have been destroyed.

Why is habitat fragmentation critical for large territorial animals such as elephants?

<p>The breeding of these animals occurs only they are living in a large habitat.</p> Signup and view all the answers

What are invasive species?

<p>Species that breach the natural barriers that would normally keep them away.</p> Signup and view all the answers

Give two ways invasive species eliminate native species.

<p>Occupying their niches and by using resources of native species.</p> Signup and view all the answers

How does genetic pollution occur?

<p>Occurs by uncontrolled hybridization.</p> Signup and view all the answers

Why is genetic pollution detrimental to rare species?

<p>It is detrimental to rare species that come into contact with more abundant ones.</p> Signup and view all the answers

What is the primary nutrient that Golden Rice is engineered to provide, and why is this significant?

<p>Golden Rice is engineered to produce beta-carotene, a precursor of vitamin A. This is significant because it addresses vitamin A deficiency, a major public health problem, especially in Southeast Asia where rice is a dietary staple.</p> Signup and view all the answers

Explain how Bt eggplant is designed to benefit farmers, and identify the specific pest it targets.

<p>Bt eggplant is designed to resist the eggplant fruit and shoot borer (EFSB), a major insect pest. This helps reduce yield losses for farmers and increase their income by minimizing damage from this pest.</p> Signup and view all the answers

Describe the negative impacts of mangrove clearing for fuel wood and prawn farming on marine ecosystems.

<p>Clearing mangroves for fuel wood and prawn farming decreases the habitat essential for breeding of marine fish, leading to a decline in fish populations and disruption of the marine ecosystem.</p> Signup and view all the answers

Define poaching, in relation to its impact on wildlife.

<p>Poaching refers to the illegal hunting, capturing, or killing of animals, typically for their valuable parts. This can decimates populations, especially for endangered species.</p> Signup and view all the answers

Explain how hybridization, while intended to increase yield, can lead to genetic erosion and gene pollution in wild species.

<p>Hybridization, while increasing yield, can cause genetic erosion as local varieties are replaced by hybrid breeds. Gene pollution occurs when hybrid genes spread to wild species, altering their genetic makeup.</p> Signup and view all the answers

Name two natural cycles that benefit from biodiversity.

<p>Nutrient and water cycling, soil formation and retention.</p> Signup and view all the answers

What is the ethical value of biodiversity centered on?

<p>Respect for life.</p> Signup and view all the answers

What types of marketable goods do we get from biodiversity?

<p>Agricultural crops, medicines, and fibers.</p> Signup and view all the answers

How does biodiversity contribute to our well-being, other than providing food and water?

<p>Through health and enjoyment.</p> Signup and view all the answers

What is one way that humans express a sense of aesthetic value for nature?

<p>By seeking contact with nature.</p> Signup and view all the answers

Give an example of an economically valuable activity directly derived from biodiversity.

<p>Selling firewood or honey from the wild.</p> Signup and view all the answers

Why is biodiversity politically important, as exemplified by the Philippines?

<p>It ensures recognition of a zone or country in the world.</p> Signup and view all the answers

Why does a 'lack of scientific knowledge' matter, when it comes to biodiversity?

<p>It leaves an enormous gap between the current realized values of biodiversity and its potential future value.</p> Signup and view all the answers

What are two potential consequences of genetic erosion and genetic pollution?

<p>Destruction of unique genotypes and a severe threat to food security or health.</p> Signup and view all the answers

Name a specific type of biodiversity hotspot particularly vulnerable to global warming.

<p>Coral reefs.</p> Signup and view all the answers

How does increased carbon dioxide concentration in the atmosphere affect marine ecosystems?

<p>It acidifies oceans.</p> Signup and view all the answers

Besides changing rain patterns, what is another effect of climate change on animals?

<p>It affects migratory animals and birds.</p> Signup and view all the answers

What is one way that habitat reduction increases the spread of diseases?

<p>It causes high population densities.</p> Signup and view all the answers

Give an example of how human activity can worsen 'natural' diseases.

<p>Human activities sometimes speed up the severity of natural diseases.</p> Signup and view all the answers

Give an example of how population increase affects natural resources, according to the text.

<p>Increase in population leads to over exploitation of resources or Forest area become reduced or Population increase ultimately cause pollution increase.</p> Signup and view all the answers

Why is biodiversity conservation important for the maintenance of natural ecological processes? Explain in one short sentence.

<p>Biodiversity has an intrinsic value because it is part of the natural world.</p> Signup and view all the answers

Flashcards

Biodiversity

The variety of life on Earth essential for ecosystems.

Habitat Destruction

Complete loss of an ecosystem leading to biological function loss.

Habitat Fragmentation

Isolated populations due to destroyed links between habitat patches.

Invasive Species

Non-native species that disrupt local ecosystems.

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Ecosystem Services

Benefits provided by ecosystems, like clean air and water.

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Genetic Pollution

Uncontrolled hybridization harming rare species.

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Threats to Biodiversity

Factors like habitat destruction, climate change, and pollution.

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Human Over-Population

Excessive human numbers leading to resource depletion.

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Golden Rice

A genetically engineered rice variety that produces beta-carotene to combat vitamin A deficiency.

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Bt eggplant

A genetically modified eggplant resistant to the eggplant fruit and shoot borer pest.

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Hybridization

The fusion of unrelated plants to create high-yield strains resilient to local conditions.

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Genetic erosion

Loss of genetic diversity in wild species due to high-yield breeding.

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Poaching

Illegal hunting or capturing of animals for their valuable parts.

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Global Warming

Increase in Earth's average temperature, impacting biodiversity.

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Ecological Value

The importance of biodiversity in maintaining natural cycles and ecosystem functions.

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Climate Change Impact

Climate change alters rainfall patterns and affects migration.

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Aesthetic Value

The appreciation for beauty in nature that provides joy and relaxation.

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Disease Spread

High population density causes easier disease transmission.

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Economic Value

The monetary worth derived from biodiversity and its resources.

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Political Value

The significance of biodiversity in establishing national identity and global recognition.

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Intrinsic Value of Biodiversity

Biodiversity has value for being part of nature itself.

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Scientific Value

The opportunities for research and discoveries in the study of biodiversity.

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Extinction Risk by 2050

An estimated 10% of species face extinction due to climate factors.

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Human Dependency

Humans rely on biodiversity for health, food, and well-being.

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Impact of Carbon Dioxide

Higher CO2 levels lead to plant changes and ocean acidification.

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Invasive Species Resistance

Biodiversity helps ecosystems withstand the impact of invasive species.

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Study Notes

Biodiversity

  • Biodiversity is the variety of life on Earth
  • It's essential for maintaining healthy ecosystems
  • It ensures the survival of all species, including humans
  • It provides essential ecosystem services, such as clean air, water, food, and climate regulation
  • Biodiversity faces threats including habitat destruction, climate change, pollution, and exploitation

Threats to Biodiversity

  • Habitat Destruction: Complete elimination of an ecosystem, leading to the loss of its biological function
    • Factors include overpopulation, deforestation, pollution, and global warming
    • Major reasons include industrial activities, mining, cattle rearing, commercial fishing, plantation cropping, and agriculture, dam construction, and encroachment
  • Habitat Fragmentation: Isolated populations due to destroyed links between habitat patches
    • Critical for large territorial animals like elephants
    • Breeding occurs only in large habitats
  • Invasion by Exotic Species: Species that breach natural barriers, displacing native species
    • They occupy niches, utilize native resources, compete with native species, and introduce diseases
    • Examples of invasive species include plants and animals
  • Genetic Pollution: Uncontrolled hybridization between rare and abundant species
    • Detrimental to rare species
    • Leads to the disappearance of rare species due to colonization by more abundant species
    • Results in irreversible changes to the genetic pool
  • Climate Change: A major threat to global biodiversity
    • Coral reefs (biodiversity hotspots) will be lost in 20-40 years if global warming continues
    • Higher carbon dioxide concentration in the atmosphere affects plant morphology and acidifies oceans
    • Impacts include changes to rainfall patterns, affecting migratory animals and birds
    • Biodiversity in polar and mountain regions are vulnerable to climate change
  • Human Overpopulation: The primary factor causing depletion of biodiversity
  • Global population is 8.2 billion
  • Increasing population leads to resource exploitation
  • Reduced forest areas
  • Increased pollution

Genetically Modified (GM) Crops

  • Golden Rice: Genetically modified variety of rice to produce beta-carotene (vitamin A precursor)
  • Combats vitamin A deficiency
  • Important tool for public health in Southeast Asia
  • Bt Eggplant: Developed by the University of the Philippines Los Baños to resist the eggplant fruit and shoot borer

Over-exploitation

  • Mangroves have been cleared for fuelwood, decreasing the habitat essential for marine fish breeding
  • Poaching: Illegal hunting, capturing, or killing of animals for valuable parts

Hybridization

  • The Green Revolution popularized hybridization for increased yield
  • Hybrid breeds created in developed countries, then hybridized with local varieties in developing countries to create high-yielding strains resistant to climate and diseases
  • This leads to genetic erosion and pollution in wild species, destroying unique genotypes
  • Hidden threat to food security and health

Values of Biodiversity

  • Intrinsic/Ethical Value: Biodiversity holds inherent value, part of the natural world
    • Important for maintaining natural ecological processes (nutrient and water cycles, soil formation, resistance to invasive species) and disasters' recovery
    • Ethical value based on respect for life
  • Anthropocentric Value: Humans depend on biodiversity for health, well-being, and enjoyment
  • Aesthetic Value: Natural landscapes and animals provide opportunities to refresh
  • Economic/Market Value: Biodiversity generates benefits that can be valued in market terms, such as fuelwood, honey, etc.
  • Political Value: Biodiversity is strategically important for country recognition, with mega-biodiverse countries like the Philippines containing a large percentage of the world's biodiversity
  • Scientific Value: Provides opportunities for research work
  • Cultural Value: Diverse plants and animals are often central to cultural practices, religions, etc.

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Related Documents

Threats to Biodiversity PDF

Description

Test your knowledge on habitat destruction, fragmentation, invasive species, and the importance of biodiversity. Explore how these factors influence ecosystems and the ethical considerations surrounding conservation efforts. This quiz is designed for students studying environmental science and conservation topics.

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