Ecosystems and Food Chains Quiz
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Questions and Answers

What is a positive aspect of subsistence farming compared to commercial farming?

  • It generates more profit.
  • It uses more advanced technology.
  • It deforests the rainforest at a slower rate. (correct)
  • It requires more education.

Commercial farming is primarily focused on producing food for personal consumption.

False (B)

Name one environmental impact of commercial farming in the Amazon rainforest.

Deforestation

Subsistence farming may not be sustainable in areas with less _____ education.

<p>education</p> Signup and view all the answers

Match the following practices with their impacts:

<p>Selective logging = Reduces deforestation Slash and burn = Releases carbon dioxide Cattle ranching = Generates significant profit Trans Amazonian Highway = Facilitates exports but damages the environment</p> Signup and view all the answers

What is one of the primary products sold by commercial farming in Brazil?

<p>Beef (D)</p> Signup and view all the answers

The introduction of infrastructure such as the Trans Amazonian Highway has only positive effects.

<p>False (B)</p> Signup and view all the answers

What contributes to the increase in cattle farming in Brazil, particularly regarding demand?

<p>Increased demand for beef from wealthier countries like China</p> Signup and view all the answers

What is a consequence of deforestation regarding medicine?

<p>Loss of medicinal sources (C)</p> Signup and view all the answers

Deforestation can lead to an increase in greenhouse gas emissions.

<p>True (A)</p> Signup and view all the answers

Which organism is a primary producer in the oak woodland ecosystem?

<p>Oak tree (D)</p> Signup and view all the answers

Consumers in an ecosystem can obtain all required energy from their food.

<p>False (B)</p> Signup and view all the answers

Name one indigenous tribe affected by deforestation.

<p>Achuar tribe</p> Signup and view all the answers

Deforestation can lead to the extinction of certain ___ due to the disruption of their food chain.

<p>species</p> Signup and view all the answers

Name a common decomposer found in an oak woodland habitat.

<p>Mushroom</p> Signup and view all the answers

Match the consequences of deforestation with their effects:

<p>Loss of medicinal sources = Reduced healthcare options Increased greenhouse gases = Climate change Flooding risk = Endangered human safety Extinction of species = Disruption of ecology</p> Signup and view all the answers

A food _____ shows the flow of energy from one organism to another.

<p>chain</p> Signup and view all the answers

What environmental issue is worsened by the decrease in trees?

<p>Water cycle disruption (C)</p> Signup and view all the answers

What is the primary difference between a food chain and a food web?

<p>Food webs represent multiple food chains. (A)</p> Signup and view all the answers

Deforestation can cause forest fires to occur more frequently.

<p>True (A)</p> Signup and view all the answers

Nutrient cycling in an ecosystem is unidirectional.

<p>False (B)</p> Signup and view all the answers

What natural disaster can be exacerbated by deforestation?

<p>Floods</p> Signup and view all the answers

Explain the role of consumers in an ecosystem.

<p>Consumers eat producers or other consumers to gain energy.</p> Signup and view all the answers

Which country produced around 300,000,000 metric tonnes of soy in 2018?

<p>Brazil (B)</p> Signup and view all the answers

Soy is only used for feeding animals and not for human consumption.

<p>False (B)</p> Signup and view all the answers

Match the following terms with their definitions:

<p>Producers = Organisms that convert sunlight and nutrients into organic molecules Consumers = Organisms that eat other organisms for energy Decomposers = Organisms that break down dead organic material Nutrient Cycling = The movement of organic and inorganic matter in an ecosystem</p> Signup and view all the answers

What is one environmental impact of soy plantations?

<p>Habitat destruction due to replacing trees with soy plantations.</p> Signup and view all the answers

Logging adds up to ____% of deforestation in the Amazon Rainforest.

<p>6</p> Signup and view all the answers

Match the following logging impacts with their effects:

<p>Soil compaction = Increased erosion Silt washing into rivers = Water quality deterioration Logging roads = Facilitation of further deforestation Creation of new jobs = Economic growth</p> Signup and view all the answers

What is the primary goal of the technique mentioned for the Amazon rainforest?

<p>To improve the effectiveness of CO2 absorption (B)</p> Signup and view all the answers

What is one of the main reasons for the increased demand for Brazilian beef?

<p>Cheaper imports from Brazil (D)</p> Signup and view all the answers

Logging has no significant economic benefits according to the information.

<p>False (B)</p> Signup and view all the answers

The Amazon rainforest absorbs more than 37% of global CO2 emissions.

<p>True (A)</p> Signup and view all the answers

What major highway was created due to logging activities?

<p>Trans-Amazonica Highway</p> Signup and view all the answers

What innovative method is being used to plant seeds in hard-to-reach areas of the Amazon?

<p>Drones</p> Signup and view all the answers

Education helps teach children about the negative effects of __________.

<p>deforestation</p> Signup and view all the answers

What is one benefit of ecotourism in poor countries?

<p>It allows for the protection of natural habitats. (B)</p> Signup and view all the answers

What is the average yearly temperature in temperate deciduous biomes?

<p>50 degrees F (D)</p> Signup and view all the answers

The Coffee Sustainability Curriculum uses an interactive app to educate about rainforest management.

<p>True (A)</p> Signup and view all the answers

Savannah biomes experience a rainy season during the winter months.

<p>False (B)</p> Signup and view all the answers

What ecological impact do drones aim to facilitate in the Amazon rainforest?

<p>Replanting and increasing tree coverage</p> Signup and view all the answers

Name one natural factor that impacts temperate grassland biomes.

<p>Tornadoes</p> Signup and view all the answers

Match the following actions with their purposes:

<p>Education = Increasing public awareness of tropical rainforests Ecotourism = Protecting natural habitats and promoting local economies Drones = Facilitating seed dropping in hard-to-reach areas Sustainability Curriculum = Training for managing rainforest resources</p> Signup and view all the answers

The desert biome covers ______ of the Earth’s surface.

<p>1/5th</p> Signup and view all the answers

Which of the following biomes has a thin layer of acidic soil?

<p>Taiga (C)</p> Signup and view all the answers

Match the biome with its characteristic:

<p>Temperate Grassland = Home to large herbivores like bison Savannah = Characterized by trees and shrubs scattered Desert = Covers 1/5th of the Earth's surface Temperate Deciduous = Four distinct seasons with moderate temperature</p> Signup and view all the answers

Temperate grasslands receive more precipitation than temperate deciduous biomes.

<p>False (B)</p> Signup and view all the answers

In savannahs, vegetation commonly includes scrub, grasses, and occasional ______.

<p>trees</p> Signup and view all the answers

Flashcards

Producer

An organism that converts sunlight, water, carbon dioxide, and minerals into energy for other organisms. Example: Oak tree

Consumer

An organism that obtains energy by eating producers or other consumers. Examples: Fox, deer, caterpillar.

Decomposer

Organisms that break down dead organic matter, releasing nutrients back into the ecosystem. Examples: Mushrooms, some insects.

Food Chain

A linear diagram showing the flow of energy from producers to consumers. It represents the feeding relationships in an ecosystem.

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Food Web

A complex network of interconnected food chains, showing the flow of energy and relationships between organisms in an ecosystem.

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Nutrient Cycling

The continuous movement and exchange of nutrients (minerals) within an ecosystem.

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Grazing Food Chain

A food chain that begins with producers, like plants, and proceeds to herbivores (plant-eaters) and then to carnivores (meat-eaters).

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Detrital Food Chain

A food chain that begins with dead organic matter and proceeds to decomposers (like fungi and bacteria).

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Drone Seed Planting

Using drones to drop seeds in hard-to-reach areas to replant trees in rainforests. This helps reforest areas quickly and efficiently, especially in challenging terrain.

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Amazon Rainforest Replanting

A project aiming to replant 5,000 trees per hectare in the Amazon rainforest to combat climate change. This helps absorb greenhouse gases and contribute to a more sustainable environment.

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Rainforest Conservation Through Education

Teaching children about the negative impacts of deforestation to raise awareness and encourage future action. It also highlights the positive aspects of biodiversity, making it more engaging and motivating.

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Ecotourism: Sustainable Development

A form of tourism that promotes responsible travel, helping protect nature and benefit local communities economically. It encourages respecting the environment instead of exploiting it.

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Ecotourism: Alternative to Resource Exploitation

Ecotourism offers a way for poor countries to develop their economies without harming their natural resources. It prioritizes preserving ecosystems and wildlife while attracting tourists.

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Rainforest Conservation: Multifaceted Approach

Combating deforestation through a combination of tactics like reforestation, education, and ecotourism. This multidimensional strategy aims to preserve rainforests and mitigate climate change.

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Education for Rainforest Management

Educating individuals involved in rainforest management about the consequences of their actions to ensure sustainable practices and minimize negative impacts.

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Coffee Sustainability Curriculum

An example of rainforest conservation through education. It provides interactive app and advanced training to promote sustainable coffee production in Brazil.

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Soy Production Impact

Increased soy production for animal feed and meat substitutes leads to habitat destruction and environmental damage. Soy plantations replace native trees, chemicals contaminate water and soil, and deforestation reduces biodiversity.

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Logging Impact on Soil

Logging operations damage soil by compacting it with heavy machinery, increasing its vulnerability to erosion. This compacted soil is less able to absorb water, leading to increased runoff and soil loss.

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Logging Impact on Water

Logging activities can lead to increased sedimentation in rivers and streams. Silt from eroded soil is washed into waterways, harming aquatic life and disrupting ecosystems.

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Logging and Deforestation

Logging contributes significantly to deforestation, especially in the Amazon Rainforest. This loss of trees has a cascading effect on the ecosystem, impacting biodiversity, climate regulation, and local livelihoods.

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Logging and New Settlers

Logging roads open up forest areas to new settlers who often clear more land for agriculture or other purposes, leading to further deforestation and environmental degradation.

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Logging Economic Benefits

Logging provides economic benefits through the production of wood products used in construction, housing, energy, and consumer goods. However, these benefits often come at a significant environmental cost.

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Logging and Leaching

Deforestation from logging can increase soil leaching, where rainwater washes away nutrients and minerals from the soil. This nutrient loss harms the forest ecosystem and reduces its ability to regenerate.

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Logging and Infrastructure

Logging operations create roads and infrastructure that facilitate further economic activity in forested areas. This can lead to increased access, more development, and potential for further deforestation.

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Taiga Biome

A cold, coniferous forest biome with thin acidic soil low in nutrients. It is dominated by evergreen trees, mosses, and lichens.

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Temperate Grassland Biome

A biome characterized by open grassy plains with sparse trees. It experiences moderate temperatures with distinct seasons and receives less precipitation than average, with fertile soil.

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Temperate Deciduous Biome

A biome characterized by four distinct seasons with moderate temperatures, abundant rainfall, and deciduous trees, shrubs, and herbs. Soil is fertile due to decaying vegetation.

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Savannah Biome

A biome characterized by grasslands with scattered trees and shrubs. It experiences a rainy season with abundant rainfall and a dry season with limited rainfall, supporting diverse animal life.

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Desert Biome

A biome characterized by extremely dry conditions with low rainfall. It covers a significant portion of Earth's surface and features specialized plants and animals adapted to arid environments.

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Factors Affecting Temperate Grassland Biome

Tornadoes, blizzards, and fires are three natural factors that significantly impact the distribution and characteristics of the temperate grassland biome.

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Vegetation in Temperate Deciduous Biome

Broadleaf trees, shrubs, perennial herbs, and mosses are typical vegetation found within the temperate deciduous biome, creating a diverse and changing landscape throughout the year.

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Soil in Temperate Deciduous Biome

The soil in temperate deciduous biomes is fertile due to the decomposition of leaves and other organic matter, providing essential nutrients for plant growth.

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Subsistence Farming & Deforestation

Subsistence farming, unlike commercial farming, can contribute to deforestation at a slower pace due to selective logging practices employed by some indigenous communities. They only cut down the trees they need, minimizing environmental impact.

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Commercial Farming & Deforestation

Commercial farming, driven by profit, has a significant negative impact on the rainforest. It necessitates deforestation on a large scale to create space for crops and cattle ranching.

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Cattle Ranching & Deforestation

Cattle ranching, a prominent form of commercial farming in the Amazon, is a major driver of deforestation. Expanding cattle ranches require vast areas of land, often obtained by clearing forests.

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Slash & Burn & Deforestation

Slash and burn is a harmful agricultural practice used in both subsistence and commercial farming. It involves burning down forests to clear land for farming, releasing large amounts of carbon dioxide into the atmosphere.

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Cattle Ranching & Economic Impact

Cattle ranching generates significant revenue for Brazil, especially in states like Mato Grosso, which has the largest and most cattle farms. This economic impact often outweighs environmental concerns.

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Soy Plantations & Deforestation

Cattle ranching drives the need for soy plantations to provide feed for the livestock. These plantations are established in deforested areas, further contributing to rainforest loss.

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Unsustainable Cattle Ranching

Cattle ranching is seen as unsustainable due to its heavy reliance on deforestation and its contribution to climate change. While it offers short-term economic benefits, its long-term impact is detrimental.

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Increased Beef Demand & Deforestation

The rising demand for beef from countries like China, fueled by economic growth, is driving the expansion of cattle ranching in the Amazon. This demand leads to increased deforestation for more pastureland.

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Loss of Medicinal Sources

Deforestation destroys natural habitats, leading to the loss of plants and animals which are valuable sources of medicine.

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Flooding and Fires

Deforestation leads to increased flooding and wildfires. Without trees to absorb water and prevent soil erosion, heavy rains can cause devastating floods. Dry areas without trees are more prone to fires.

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Greenhouse Gas Emissions

Trees absorb carbon dioxide (CO2), a major greenhouse gas that contributes to climate change. Deforestation reduces the planet's ability to absorb CO2, worsening the climate crisis.

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Indigenous People and Deforestation

Indigenous communities often rely on forests for their survival. Deforestation disrupts their way of life, leading to loss of resources and potential displacement.

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Impact on Food Chains

Deforestation destroys habitats, disrupting the delicate balance of food chains. Animals lose their food sources and may become extinct, impacting the entire ecosystem.

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Water Cycle Disruption

Trees play a crucial role in the water cycle, absorbing water and releasing it back into the atmosphere. Deforestation disrupts this cycle, leading to droughts and dry soil, making it difficult for plants to grow.

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Infertility of Soil

Deforestation leads to soil infertility. The loss of trees causes less water retention, increased erosion, and a depletion of nutrients, making it difficult for plants to grow.

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Negative Impact on Environment

Deforestation has a devastating impact on the environment, affecting the air, water, soil, and the well-being of all living organisms, making the Earth less hospitable.

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Study Notes

Ecosystems

  • Ecosystems are natural systems with interconnected relationships.
  • Specific examples like UK oak woodlands are used to illustrate the concept.
  • Producers convert water, carbon dioxide, minerals, and sunlight into organic molecules.
  • Producers in oak woodlands include oak trees, consumed by insects and mammals.
  • Producers are primarily plants.
  • Consumers eat producers or other consumers to obtain energy.
  • Consumers need to eat lots to gain sufficient energy.
  • Consumers such as foxes and deer in an oak woodland help regulate populations.
  • Decomposers obtain energy by breaking down dead organic material.
  • Decomposers, like mushrooms and some insects, in an oak woodland break down complex organic molecules into simpler ones (e.g., water, carbon dioxide).
  • Food chains show which organism eats another.
  • Two types of food chains are: grazing (starts with plants), and detrital (starts with dead organic matter).
  • Food webs combine multiple food chains, showing interconnected energy transfer.

Nutrient Cycling

  • Nutrient cycles (or ecological recycling) involve the movement of organic and inorganic matter.
  • Energy flow is unidirectional and non-cyclic.
  • Mineral nutrient movement is cyclic.
  • Examples of mineral cycles include carbon, sulfur, nitrogen, water, phosphorus, and oxygen cycles.

Ecosystem Balance

  • Energy flow and nutrient cycling need to be constant to maintain equilibrium.
  • Green plants capture sunlight to convert substances from water, air, and rocks into living matter.
  • Any alteration in balance triggers chain reactions affecting the entire system.
  • Removing plants can lead to more floods, harming consumers.

Biomes (Global Ecosystems)

  • Tundra is a treeless polar desert (-34°C to -6°C, 150-200mm rainfall).
  • Taiga has low annual temperatures (-10°C to slightly above 0°C, 40-100cm precipitation) and is dominated by conifer trees.
  • Temperate grasslands have sparsely populated trees, low precipitation (500-900mm per year), and wide temperature range (-20°C to 30°C).
  • Temperate deciduous forests have moderate temperatures (50°F/10°C) and 750-1500mm of rain annually with distinct seasons.
  • Savannahs are grasslands with scattered trees and shrubs, with distinct rainy (15-25 inches) and dry seasons.
  • Deserts have low precipitation (50cm maximum) with hot and dry, semiarid, coastal, and cold types.

Tropical Rainforests

  • Tropical rainforests are located between 20-25 degrees north and south of the equator, receiving high rainfall and heat.
  • Constant warm temperatures and high humidity lead to plant and animal diversity.
  • High biodiversity, but also high extinction rates.

Economic and Environmental Impacts

  • Subsistence farming involves growing crops for household use, often with lower environmental impact.
  • Commercial farming (e.g., cattle ranching, soy) results in more significant deforestation and environmental damage due to large-scale processes and release of harmful gases.
  • Deforestation results in habitat loss, biodiversity decline, and increased greenhouse gas emissions.
  • Logging removes trees, leading to habitat destruction, soil erosion, and increased greenhouse gas concentrations.
  • Mineral extraction can cause deforestation and environmental damage.
  • Energy development (oil and hydroelectric dams) can affect landscapes, habitats, and water flow.

Sustainable Management Strategies

  • Selective logging removes specific trees, leaving the rest intact for biodiversity conservation and forest regeneration.
  • Replanting or reforestation restores cleared or damaged forest ecosystems.
  • Ecotourism encourages sustainable use of natural resources by creating jobs for local communities.
  • International agreements, such as the International Tropical Timber Agreement, promote sustainable forest management.
  • Debt-for-nature swaps encourage environmentally friendly practices in exchange for reduced debt.

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Test your knowledge on ecosystems and their interconnected relationships. This quiz covers concepts such as producers, consumers, decomposers, and the differences between food chains and food webs. Dive into specific examples like UK oak woodlands to enhance your understanding.

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