Identifying Abiotic Factors in Stream Health
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Questions and Answers

What type of factors are studied to determine the health of streams in two watersheds?

  • Geological factors
  • Abiotic factors (correct)
  • Biotic factors
  • Atmospheric factors
  • Which of the following would NOT be an abiotic factor in determining stream health?

  • pH level
  • Presence of aquatic plants (correct)
  • Water temperature
  • Stream flow rate
  • What is the primary purpose of studying abiotic factors in streams?

  • To determine the population of aquatic species
  • To identify the source of water pollution
  • To measure the water's oxygen levels
  • To assess the health of the stream ecosystem (correct)
  • Which two watersheds are being compared in the study?

    <p>This information is not provided</p> Signup and view all the answers

    Why is it important to study streams in two different watersheds?

    <p>To compare the effects of different abiotic factors</p> Signup and view all the answers

    What is a common strategy used by desert mammals to cope with high daytime temperatures?

    <p>Being active at night</p> Signup and view all the answers

    What is a common feature of a white-throated wood rat's den?

    <p>It is made of desert litter and cactus parts</p> Signup and view all the answers

    Why do some birds and mammals seek out cool microclimates?

    <p>To escape the heat</p> Signup and view all the answers

    What is a behavior exhibited by a javelina during the summer?

    <p>It is never active during the day</p> Signup and view all the answers

    What is a type of microclimate that a pallid bat may seek out during the day?

    <p>A cool, deep crevice in a cliff face</p> Signup and view all the answers

    What is a common time period when day-active birds are most active?

    <p>At dawn</p> Signup and view all the answers

    What is the primary function of water in the living process of birds and mammals?

    <p>As a transport medium for nutrients and waste</p> Signup and view all the answers

    What is the term used to describe the water produced by animals when they metabolize food?

    <p>Oxidation water</p> Signup and view all the answers

    Which of the following desert animals is able to survive without free water or moist food?

    <p>Kangaroo rat</p> Signup and view all the answers

    What is the adaptation of some desert plants that allows them to survive dry periods?

    <p>Underground organs such as bulbs or tubers</p> Signup and view all the answers

    What is the strategy adopted by some desert animals to conserve energy during dry periods?

    <p>Slowing down their metabolism</p> Signup and view all the answers

    What is the term used to describe the plants that can absorb dew as their main water source?

    <p>Mosses and lichens</p> Signup and view all the answers

    Study Notes

    Desert Adaptations of Birds and Mammals

    • Desert ecosystems are characterized by extreme temperatures (freezing to over 100°F/38°C) and limited water availability.
    • Birds and mammals have developed adaptive strategies to cope with these conditions, including avoidance, seeking cool microclimates, and water income and water expense.

    Avoidance Strategies

    • Many desert mammals are most active at dusk and dawn to avoid high daytime temperatures.
    • Examples: bobcat, javelina, and some day-active birds.
    • Some mammals, such as ringtails and kangaroo rats, are never active during the day.
    • Animals may seek out cool microclimates to escape the heat.
    • Examples: cactus wren resting in the shade of a jojoba, prairie falcon nesting on a cool north-facing cliff, and pallid bat resting in a cool, deep crevice.

    Water Income and Water Expense

    • Water is essential for birds and mammals, serving as a transport medium for nutrients, and for dilution and removal of body wastes.
    • Water functions in chemical reactions, and is the body's primary coolant.
    • The water-budget balancing act of desert animals is like balancing a bank account: water income vs. water expense.
    • Water income can come from:
      • Free water (e.g., drinking at a water hole)
      • Water in food (e.g., eating a juicy mistletoe berry)
      • Oxidation water (produced when metabolizing food)
    • Water expenses can come from:
      • Evaporative cooling
      • Dilution and excretion of toxic body wastes
      • Feces, and eggs or milk

    Other Adaptations

    • Some desert plants can absorb dew, which is their main water source.
    • Examples: mosses, lichens, and some flowering plants (resurrection plants).
    • Desert plants can survive dry periods through underground organs, such as bulbs, tubers, or rhizomes.
    • Some plants can remain physiologically active during dry periods.
    • Desert animals have adaptations to infrequent moisture availability, such as:
      • Little activity during dry times, and intense activity during brief wet periods.
      • Remaining underground in holes or burrows during dry conditions.
      • Some animals, like snails, can remain dormant for long periods.
      • Others, like burrowing animals, can slow down their metabolism during dry periods to conserve energy.

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    Description

    Determine the health of streams in two watersheds by studying two crucial abiotic factors. This quiz helps you understand the importance of these factors in maintaining healthy ecosystems. Test your knowledge and learn more about environmental science!

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