Introduction to Biomes Quiz

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Questions and Answers

What is a significant factor that threatens the vegetation in tropical grasslands and savannas?

  • Grazing pressure from domestic livestock (correct)
  • Excessive rainfall
  • Presence of dense forests
  • High elevation

Which statement best describes the rainfall patterns in deserts?

  • Rainfall is inadequate but sufficient for forest growth
  • Rainfall is consistently abundant throughout the year
  • Rainfall is rare and unpredictable, typically less than 30 cm annually (correct)
  • Rainfall is seasonal with a rainy season similar to temperate regions

What type of vegetation is commonly found in temperate grasslands?

  • Dense forests with high biodiversity
  • A mix of grasses and flowering herbaceous plants known as forbs (correct)
  • Sparse vegetation with limited diversity
  • Tropical plants adapted to wet conditions

In what way are desert ecosystems particularly vulnerable to human activity?

<p>Damage from off-road vehicles (B)</p> Signup and view all the answers

What role do fires play in tropical savannas and grasslands?

<p>They can kill off young trees and maintain an open landscape (B)</p> Signup and view all the answers

What is a unique characteristic of desert vegetation compared to grassland vegetation?

<p>Desert plants are highly adapted to survive long droughts and extreme heat (B)</p> Signup and view all the answers

What factor contributes to the formation of thick, organic-rich soils in temperate grasslands?

<p>Annual winter accumulation of dead leaves and deep roots (D)</p> Signup and view all the answers

What primarily determines the distribution of terrestrial biomes?

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

How does biological productivity typically vary with climate conditions?

<p>It is generally greater in hot, humid regions (A)</p> Signup and view all the answers

What is vertical zonation in the context of biomes?

<p>The rapid change in vegetation type with altitude on a mountain (C)</p> Signup and view all the answers

Which type of forests are characterized by consistently high moisture due to fog and mist?

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

Which factor is NOT considered in predicting the type of biological community likely to occur in a biome?

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

What tool is primarily used to describe and compare precipitation and temperature in different biomes?

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

What would most likely occur in the absence of human disturbance in a particular area?

<p>A consistent type of biological community based on climate (B)</p> Signup and view all the answers

Which of the following does not significantly influence the distribution of terrestrial biomes?

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

What type of vegetation primarily characterizes temperate shrublands?

<p>Evergreen shrubs with leathery leaves (C)</p> Signup and view all the answers

Which animal is commonly found in the chaparral ecosystem?

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

What is the primary characteristic of coniferous forests?

<p>They are dominated by trees such as pines and spruces. (A)</p> Signup and view all the answers

What natural phenomenon significantly influences plant succession in temperate shrublands?

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

What defines the taiga region?

<p>It represents a transition area between forest and tundra. (B)</p> Signup and view all the answers

Where are temperate deciduous forests mainly located?

<p>In the eastern half of the United States and Europe (D)</p> Signup and view all the answers

During which part of the year does the arctic tundra experience its peak plant growth?

<p>During midsummer with 24-hour sunshine. (A)</p> Signup and view all the answers

Which type of forest is known to grow in extremely wet conditions on the Pacific coast?

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

Which of the following statements about alpine tundra is correct?

<p>It has a short and intense growing season. (A)</p> Signup and view all the answers

What is a significant characteristic of vertical stratification in aquatic ecosystems?

<p>Light decreases rapidly with depth. (C)</p> Signup and view all the answers

What is a characteristic of coniferous forests?

<p>They can grow in a range of temperature and moisture conditions (A)</p> Signup and view all the answers

Which of the following statements is true about deciduous forests?

<p>They lose their leaves in winter in mid-latitude regions (B)</p> Signup and view all the answers

Which zone of the ocean is primarily characterized by photosynthetic organisms?

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

Which type of biome could be classified as a 'very cold desert'?

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

What is one reason coniferous forests are considered slow-growing ecosystems?

<p>Cold temperatures limit their growing season. (D)</p> Signup and view all the answers

What type of climate predominantly supports broadleaf forests?

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

What type of ecosystem is considered among the most productive and diverse marine ecosystems?

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

Which factor does NOT significantly impact marine ecosystems based on depth?

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

Which tree species is typically NOT found in the boreal forest?

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

What is the primary role of mangrove forests in coastal ecosystems?

<p>Stabilize shorelines and serve as nurseries. (C)</p> Signup and view all the answers

What is a distinguishing feature of alpine tundra plants?

<p>They have deep pigmentation and leathery leaves. (D)</p> Signup and view all the answers

Which ocean zone can be found at depths greater than 6,000 meters?

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

Which group consists of microscopic floating algae that perform photosynthesis in pelagic ecosystems?

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

Which zone is characterized by the area temporarily exposed by low tides?

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

Which biome is characterized by seasonal changes and a variety of deciduous trees?

<p>Temperate Deciduous Forest (C)</p> Signup and view all the answers

What is a key characteristic of grasslands regarding their role in carbon storage?

<p>They act as a more reliable carbon sink than trees. (D)</p> Signup and view all the answers

Which biome is typically found at high altitudes with limited tree growth and permafrost?

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

Which biome features plants adapted to dry, hot conditions and is often found in California?

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

What distinguishes coastal mangroves from other ecosystems?

<p>Adapted to saltwater environments (A)</p> Signup and view all the answers

What is a defining feature of coral reef ecosystems?

<p>Rich biodiversity and complex structures created by coral (C)</p> Signup and view all the answers

Which biome is characterized by high annual rainfall and a large canopy composed of diverse tree species?

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

What type of habitat do tidal pools represent?

<p>Intertidal zones along coastlines (C)</p> Signup and view all the answers

Flashcards

Biome

A type of community with similar climate, vegetation, and growth patterns.

Terrestrial Biomes

Land-based biomes, characterized by plant and animal communities adapted to specific temperature and precipitation.

Climate Graph

A graph that visually displays temperature and precipitation patterns in a biome.

Biome Distribution

The pattern of where different biomes occur on Earth, primarily determined by temperature and precipitation.

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Vertical Zonation

Changes in vegetation types that occur as elevation increases on a mountain.

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Tropical Moist Forests

Warm, humid biomes with high biological productivity and diverse plant and animal life.

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Cloud Forest

A type of tropical moist forest found high in mountainous areas with persistent fog and mist.

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Tropical Savanna

A grassland ecosystem with a rainy season, but generally less rain than a forest, prone to fires during dry seasons. Plants have adaptations to survive drought, heat, and fire.

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Tropical Grassland

Similar to savannas, but possibly with less rainfall. Also affected by fires and grazing.

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Desert

A biome with infrequent and unpredictable rainfall, usually less than 30 cm per year. Vegetation is sparse, plants and animals are highly adapted to drought and extreme temperatures. Soils recover slowly.

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Temperate Grassland

Grassland in a mid-latitude climate. Supports abundant grasses but not forests. Plants have deep roots to resist drought, fire, heat, and cold. Have thick organic-rich soil.

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Grazing pressure

The effect of livestock eating plants in a grassland ecosystem. This can be a threat to both plants and animals in tropical grasslands and savannas.

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Desert Vulnerability

Deserts are easily damaged by vehicles and overgrazing because of sparse slow-growing vegetation; and recovery of the soil is slow.

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Deep roots

The roots of plants in temperate grasslands and savannas that extend deep into the soil to access water and resist harsh weather conditions.

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Herbaceous plants

Flowering plants that do not become woody (like a tree). These are common in grasslands as part of the diverse mix of vegetation.

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Temperate Grassland

A biome with grasses and few trees, where fires are common, and animals like jackrabbits and prairie dogs thrive.

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Temperate Shrubland (Chaparral)

A biome dominated by drought-resistant shrubs and small trees, often with periodic fires.

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Temperate Deciduous Forest

A forest that experiences seasonal temperature changes and loses its leaves in winter; found in mid-latitudes.

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Coniferous Forest

A forest biome dominated by cone-bearing trees (like pines and firs) that can tolerate various moisture conditions.

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Temperate Rainforest

A cool, rainy forest, often shrouded in fog, found in specific coastal areas.

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Coniferous Forest (Boreal Forest)

Largest terrestrial biome with cold temperatures, short frost-free growing season. Dominant trees include pines, hemlocks, spruce, cedar, and fir. Found in northern parts of Europe, North America, and Asia.

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Boreal Forest

Another name for the Coniferous Forest, often used to describe northern forests.

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Taiga

The edge of the boreal forest, where it transitions to open tundra.

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Tundra

Treeless landscape found at high latitudes or on mountaintops, with very short growing seasons. Can have frost any month.

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Arctic Tundra

A widespread tundra biome, low productivity due to short growing seasons but bursts of growth and insect life during summer.

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Alpine Tundra

Tundra on mountains, with similar conditions and vegetation to Arctic tundra, but short growing season and strong UV light.

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Marine Ecosystem

A complex ecosystem of various organisms found in the ocean characterized by depth-related variables such as light, temperature, and salinity.

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Vertical Stratification

The layering of organisms and characteristics within an aquatic ecosystem, primarily due to the diminishing light penetration at increasing depth.

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Photic Zone

The upper layer of an aquatic ecosystem where sunlight penetrates and supports photosynthesis.

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Phytoplankton

Microscopic algae that perform photosynthesis in the pelagic zone of aquatic ecosystems.

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Zooplankton

Small, weakly swimming animals that consume phytoplankton.

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Benthic Communities

Organisms living on the ocean floor.

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Pelagic Zone

The water column of an aquatic ecosystem.

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Epipelagic Zone

The upper layer of the pelagic zone, where sunlight is sufficient for photosynthesis.

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Abyssal Zone

The deep ocean zone (4,000 m or greater) with very low light levels.

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Coral Reefs

Marine ecosystems characterized by high biological productivity and diverse organisms.

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Mangroves

Saltwater trees found in tropical coastal areas.

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Temperate Deciduous Forest

A forest biome characterized by trees that lose their leaves seasonally, with distinct seasons and moderate rainfall.

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Coniferous Forest

A forest biome dominated by cone-bearing trees, like pines and firs, adapted to cold climates and often with long, snowy winters.

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Tropical Rain Forest

A forest biome found near the equator with high temperatures and rainfall throughout the year, supporting immense biodiversity.

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Tropical Seasonal Forest

A forest biome experiencing distinct wet and dry seasons, characterized by trees that may shed leaves during the dry season.

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Chaparral

A shrubland or woodland biome with drought-resistant shrubs and small trees, adapted to fire and irregular rainfall.

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Grassland

A biome dominated by grasses, with few trees except along water sources, often experiencing frequent fires.

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Desert

A biome with extremely low precipitation, characterized by sparse vegetation and adaptations to conserve water.

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Mangrove forest

A coastal biome with saltwater-tolerant trees and shrubs, often found in estuaries.

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Tidal Pool

A shallow pool of saltwater, formed by the ocean's tides, supporting a unique community of organisms adapted to fluctuation in water level, salinity, and temperature.

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Coral Reef

A marine biome characterized by the calcium carbonate skeletons of coral animals and supporting a diverse range of marine life.

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Study Notes

Introduction to Biomes

  • Biomes are general types of communities with similar climates, growth patterns, and vegetation types.
  • Marine and freshwater ecosystems are also presented in the discussions.
  • Human disturbance patterns of world biomes are discussed.

Learning Outcomes

  • Intended Learning Outcome 1 (Syllabus): Acquire a high level of awareness about the environment and its significance.
  • Topic Outcome: State the characteristics of some major terrestrial biomes and the factors that determine their distribution.

Terrestrial Biomes

  • The characteristics of biological communities vary with temperature, precipitation, and latitude.
  • Hot, humid regions typically have greater biological productivity than cold or dry regions.

Climate Graphs

  • Climate graphs are used to describe and compare precipitation and temperature patterns in different biomes.
  • Temperature and precipitation are the key determinants in biome distribution.
  • In the absence of human disturbance, the type of biological community can be predicted based on temperature range and precipitation levels.
  • Vertical zonation is observed with vegetation types changing rapidly from warm and dry to cold and wet as you climb a mountain.

Major World Biomes (Examples)

  • Tropical Moist Forests (Tropical Rainforests): High rainfall (more than 200 cm or 80 inches per year), warm to hot temperatures year-round. The soil is thin, acidic, and nutrient poor, yet still supports an enormous diversity of species (millions of insects and many plants).
  • Cloud Forests: Found in mountainous regions with high elevation where mist and fog keep the vegetation wet. Occur in high elevations near mountains.
  • Tropical Seasonal Forests (Tropical Dry Forests): Characterized by a dry season but burst into lush green during rainy months. Many of the trees are drought-deciduous, losing their leaves during dry periods.
  • Tropical Savannas and Grasslands: Receive 25-150cm (10-60 inches) of rain annually; have grasses and occasional trees. The dry season often involves wildfires; many adaptations to survive fires and drought (e.g. deep roots, resistance to heat). Domestic livestock grazing may threaten plants and animals.
  • Deserts: Rare and unpredictable precipitation (usually less than 30 cm or 12 inches of rain per year). Vegetation is sparse with highly adapted plants and animals. Soil is vulnerable to overgrazing and erosion.
  • Temperate Grasslands: Moderate precipitation that supports abundant grasses but not forests. Mixed vegetation of grasses and other flowering plants. Deep roots help plants survive drought. Subject to periodic fires.
  • Temperate Shrublands (Chaparral): Dense growth of evergreen shrubs with leathery, waxy leaves. Periodic fires are common; many animals are adapted to drought. Found in Mediterranean regions.
  • Temperate Forests (Deciduous Forests): Deciduous trees lose their leaves seasonally. Occur where rainfall is plentiful. Many trees are broadleaf.
  • Temperate Forests (Coniferous Forests): Evergreens. Occur in cool climates; have a short frost free season; often found in mountain areas. Have a mix of pines, hemlocks, spruce, cedar and fir.
  • Boreal Forest (taiga): Extensive coniferous forest in high northern latitudes. Trees include pines, hemlocks, spruce, cedar and fir with some deciduous trees. Temperatures are cold and the growing season is short.
  • Tundra: Treeless landscape at high latitudes; has a short growing season and often has frost most of the year. Plants are adapted to survive cold temperatures. Can be Arctic or Alpine tundra.
  • Marine Ecosystems: Vary with depth, temperature and salinity. Vertical stratification is important; productivity depends on sources of energy other than photosynthesis in deeper areas.
  • Estuaries: Regions where rivers meet the sea, mixing fresh and saltwater. Critical nurseries for many species. Have mangroves and salt marshes.
  • Tide Pools: Depressions in rocky shorelines that retain water at low tide. Varying organisms adapted to harsh conditions.
  • Coral Reefs: Among the world's most diverse and productive ecosystems; have high biological productivity and diverse organisms.
  • Wetlands (Swamps, marshes, bogs, fens): Shallow ecosystems with saturated or submerged land. Have vegetation adapted to saturated conditions.
  • Barrier Islands: Low, narrow sandy islands parallel to coastlines made of sediments carried by rivers or currents.

Human Disturbance

  • Humans have a significant impact on the planet's ecosystems.
  • Deforestation and habitat destruction are major causes of biodiversity loss.
  • Conversion of natural habitats to residential, agricultural, and other human-dominated uses is the largest driver of biodiversity loss.

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