Ocean Temperature Variation Quiz
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Questions and Answers

What is the typical range of temperature variation in the marine environment, excluding specific extreme areas?

  • 150 C
  • 30 C35 C (correct)
  • 10 C
  • 50 C
  • Which region experiences the greatest seasonal variations of surface sea temperature?

  • China Sea (correct)
  • Caspian Sea
  • Antarctic waters
  • Southern Ocean
  • What is the temperature range for deep ocean water below about 2000 m?

  • 5 C to 10 C
  • 10 C to 15 C
  • 21.9 C to 4 C (correct)
  • 0 C to 4 C
  • Where is the coldest water found in the ocean?

    <p>Antarctic bottom water (A)</p> Signup and view all the answers

    What defines a thermocline in the ocean?

    <p>A sharp transition between warm upper layers and cold deep layers (D)</p> Signup and view all the answers

    What is the typical variation of surface temperature across inland seas?

    <p>Can exceed 20 C (C)</p> Signup and view all the answers

    What is the usual temperature of bottom water in the Red Sea?

    <p>22 C (D)</p> Signup and view all the answers

    What feature characterizes the region of submarine volcanism in the deep ocean?

    <p>Hydrothermal vents emitting temperatures of 200 C to 300 C (A)</p> Signup and view all the answers

    What defines the thermosphere layer in oceanography?

    <p>Warm, mixed water layer above the discontinuity layer (D)</p> Signup and view all the answers

    In which region does a permanent thermocline occur year-round?

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

    During which season does a temporary thermocline typically form in middle latitudes?

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

    What temperature range is typical for ocean water from surface to deep layers?

    <p>1.8°C to 21.8°C (D)</p> Signup and view all the answers

    What happens to the thermocline in high latitudes?

    <p>It disappears due to surface cooling and convectional mixing. (C)</p> Signup and view all the answers

    How does freshwater from precipitation or melting ice affect ocean temperature profiles?

    <p>It forms a low-density layer of colder water above denser water. (C)</p> Signup and view all the answers

    What impact do thermoclines have on pelagic species in oceans?

    <p>They create barriers separating warm-water and cold-water populations. (A)</p> Signup and view all the answers

    What is the depth range where the thermocline typically occurs in ocean waters?

    <p>200 to 1000 m (C)</p> Signup and view all the answers

    What advantage does seawater provide to fragile forms of life such as gelatinous plankton?

    <p>It minimizes the need for structural complications. (B)</p> Signup and view all the answers

    What is a limiting factor for photosynthetic organisms in the ocean?

    <p>Light penetration in water (C)</p> Signup and view all the answers

    How do stable physical conditions in the ocean influence marine organisms?

    <p>They allow for evolution of species with precise environmental requirements. (C)</p> Signup and view all the answers

    What geographic gradient significantly affects physical conditions in the ocean?

    <p>Latitude from tropics to poles (A)</p> Signup and view all the answers

    Which combination of factors makes it difficult to assess the role of each variable independently in marine species distribution?

    <p>The co-varying physical properties of seawater. (C)</p> Signup and view all the answers

    What unique characteristic of the ocean provides a three-dimensional living space for marine organisms?

    <p>The vertical gradient of physical conditions. (C)</p> Signup and view all the answers

    Which statement accurately describes the effects of seawater's density?

    <p>Density plays a role in species distribution. (A)</p> Signup and view all the answers

    What is a notable feature of the marine environment regarding physical conditions?

    <p>They remain remarkably constant over large areas. (B)</p> Signup and view all the answers

    What is the minimum surface water temperature for warm-water populations to thrive?

    <p>18°C (C)</p> Signup and view all the answers

    Where are coral reefs most abundantly found?

    <p>In clear shallow water with temperatures above 20°C (C)</p> Signup and view all the answers

    What characteristic defines the northern boundary of cold water in the Southern Ocean?

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

    What is the typical surface water temperature range for cold-water populations?

    <p>5°C to just below 0°C (A)</p> Signup and view all the answers

    Which region experiences minimal seasonal temperature variation?

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

    What is the effect of the sharp temperature gradient at the Antarctic Convergence?

    <p>It creates a barrier for Antarctic species (D)</p> Signup and view all the answers

    In which of the following areas are surface water temperatures likely to be highest?

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

    Why are warm-water zones more extensive than coral reef zones?

    <p>Coral reefs thrive mainly in shallow areas with specific conditions. (A)</p> Signup and view all the answers

    What primarily influences the distribution of marine species across the oceans?

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

    How do temperature tolerances affect species distribution?

    <p>Species with wide tolerances can thrive in various regions. (B)</p> Signup and view all the answers

    Which ocean temperature profile corresponds with seasonal changes in temperate latitudes?

    <p>Surface mixed layer profile (C)</p> Signup and view all the answers

    What can happen when non-native species are introduced to a new ocean with a matching temperature regime?

    <p>They may survive and even thrive. (D)</p> Signup and view all the answers

    What is true about the temperature tolerances of marine species?

    <p>They dictate their geographical distribution. (C)</p> Signup and view all the answers

    Within what range do species typically find their distribution confined?

    <p>Their temperature range (D)</p> Signup and view all the answers

    What do the generalised ocean temperature profiles illustrate about seasonal temperature changes?

    <p>Surface temperatures fluctuate with seasons. (B)</p> Signup and view all the answers

    What role does the depth of the ocean play in temperature profiles?

    <p>Temperature profiles change predictably with depth. (C)</p> Signup and view all the answers

    What evidence challenges the concept of cosmopolitan deep-sea species?

    <p>Genetic studies indicate multiple species-level clades within Eurythenes gryllus. (B)</p> Signup and view all the answers

    Which of the following best describes the habitat distribution of abyssal species?

    <p>Some species are restricted in distribution due to physical barriers. (D)</p> Signup and view all the answers

    What role does water temperature play in the distribution of marine organisms?

    <p>It is a major factor among many influencing species distribution. (B)</p> Signup and view all the answers

    Which deep-sea species is noted for its distribution across all five major ocean basins?

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

    What is suggested as a potential factor controlling speciation in the deep ocean?

    <p>Subtle environmental differences and barriers (D)</p> Signup and view all the answers

    What specific barrier is mentioned that restricts some abyssal species from crossing?

    <p>Submarine ridges separating the Arctic from the North Atlantic (C)</p> Signup and view all the answers

    How do genetic differences among abyssal species manifest according to recent studies?

    <p>They correspond with small morphological differences. (B)</p> Signup and view all the answers

    What type of sampling is suggested for better understanding deep-sea species distribution?

    <p>Wider sampling and further genetic studies in the deep sea (A)</p> Signup and view all the answers

    Flashcards

    Seawater environment

    The physical and chemical properties of seawater, including temperature, composition, density, viscosity, pressure, light, and movements, all influencing marine life.

    Seawater support

    Seawater provides buoyancy for marine organisms, minimizing the need for complex structures such as skeletons.

    Light limitation

    Light penetration in the ocean is limited, primarily affecting photosynthetic organisms like seaweed, especially in deep water.

    Stable marine conditions

    Physical conditions in the ocean can remain constant over large areas, allowing wide distributions of some species.

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    Ocean gradients

    The ocean has two major gradients: geographical (tropics to poles) and depth-wise (surface to seabed), affecting variables like temperature and light.

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    Organism distribution

    Distribution of a species is influenced by many factors in the ocean like temperature, light, pressure, and salinity, making it complex to isolate the impact of any individual factor.

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    Temperature and density

    Seawater temperature affects its density. These two factors are intertwined making it difficult to study them apart.

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    Marine acclimatization

    Marine organisms can adapt to slow changes in their environment over time, allowing them to live in large sections of the ocean.

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    Marine Temperature Range

    The difference between the hottest and coldest parts of the marine environment, excluding shallow water and hydrothermal vents, is roughly 30-35 degrees Celsius.

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    Land Temperature Range

    The temperature variation on land is significantly greater than in the ocean, nearly 150 degrees Celsius.

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    Surface Sea Temperature Variation

    Surface sea temperatures in high and low latitudes remain fairly stable throughout the year; in middle latitudes, they change with the seasons.

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    Seasonal Temperature Change (Ocean)

    The change in surface sea temperature varies between locations; a typical range is around 10 degrees Celsius, but it can be greater in specific areas like the China Sea and Black Sea.

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    Deep Ocean Temperature

    Deep ocean layers (below ~2000 m) remain consistently cold, typically between 4 and 22 degrees Celsius; Antarctic bottom water is the coldest.

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    Hydrothermal Vents

    Areas of submarine volcanism where water at surprisingly high temperatures (200-300 C) emerges from vents. This heats the surrounding water to 10-17 degrees Celsius.

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    Thermocline

    A relatively sharp temperature transition between the warmer upper layer and the colder deep water layer of the ocean.

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    Discontinuity Layer

    The zone of transition between the warmer, mixed upper layer (epipelagic region) and the cold deepwater layers (bathypelagic), marked by the thermocline.

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    Thermocline location

    A layer in the ocean where temperature changes rapidly with depth. Typically found between 200 and 1000 meters.

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    Thermocline formation (low latitudes)

    A permanent thermocline in low latitudes, formed due to constant sun and heat absorption at the surface.

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    Thermocline formation (mid-latitudes)

    Temporary thermoclines form during summer months near the surface (15-40m), disappearing in winter.

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    Thermocline formation (high latitudes)

    Little temperature difference between surface and deep layers due to heat transfer to the atmosphere. Convective mixing.

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    Thermocline impact on organisms

    Thermoclines act as boundaries, separating warm-water and cold-water species populations.

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    Seasonal thermocline effect

    Seasonal thermoclines in temperate regions affect nutrient supply and plankton blooms.

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    Ocean temperature range

    Ocean temperatures generally range from -1.8°C to 21.8°C at various depths.

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    Irregular temperature gradient

    Variation in temperature at the top 1000 meters due to freshwater from precipitation or melting ice and water from middle latitudes.

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    Ocean temperature profiles

    Representations of how water temperature changes with depth in the ocean, showing seasonal and regional variations.

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    Species distribution

    The geographic areas where a particular species is found, largely determined by water temperature tolerances.

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    Temperature tolerances

    The range of water temperatures at which a species can survive and thrive, differing greatly between species.

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    Thermal regime

    The pattern of temperature changes over time and space in an aquatic environment.

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    Introduction of non-native species

    The accidental or purposeful transport of species to environments different from the ones they originally evolved in, potentially thriving due to similar temperature regimes.

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    Ocean species

    Variety of marine organisms adapted to specific temperature zones within the ocean.

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    Seasonal temperature changes

    Variations in water temperature throughout the year, impacting species distribution.

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    Regional temperature profiles

    Show how ocean water temperature varies in different locations and depths(like a different region, the same ocean).

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    Warm-water populations

    Marine organisms that thrive in consistently warm waters, typically above 18-20°C, found in tropical regions.

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    Cold-water populations

    Marine organisms adapted to cold waters, usually between 5°C and slightly below 0°C, found in Arctic and Southern Oceans.

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    Coral Reefs

    Diverse ecosystems formed by corals, thriving in clear, shallow waters with temperatures above 20°C, most abundant in tropical regions.

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    Antarctic Convergence

    A sharp boundary between cold Antarctic water and warmer sub-Antarctic water, acting as a barrier for Antarctic species.

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    Temperature Gradient

    A gradual change in temperature across a specific area, like the Antarctic Convergence, affecting species distribution.

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    Equator

    The imaginary line circling the Earth at 0° latitude, where surface water temperatures remain relatively stable and warm.

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    Seasonal Temperature Variations

    Changes in temperature over different seasons, typically less pronounced in equatorial regions compared to other areas.

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    Marine Biogeographic Areas

    Regions within the ocean characterized by distinct sets of marine organisms and their ecological relationships based on environmental factors.

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    Deep-sea biodiversity

    The variety of life in the deep ocean is greater than previously thought, with some species having limited ranges.

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    Deep-sea species distribution

    Many deep-sea species are found in a wide range of geographical locations and depths, suggesting few dispersal barriers.

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    Arctic-Atlantic barrier

    Submarine ridges and the shallow Bering Strait create a barrier that some deep-sea species cannot cross, limiting their distribution.

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    Cosmopolitan deep-sea species?

    The idea that some deep-sea species are found everywhere is being challenged by genetic research, suggesting more diverse lineages.

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    Eurythenes gryllus

    This giant amphipod was thought to be widespread, but genetic studies revealed distinct lineages restricted to specific ocean basins and depths.

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    Deep-sea speciation?

    Speciation in the deep sea may be driven by subtle environmental differences and barriers, not just temperature.

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    Water temperature's impact

    Water temperature significantly influences the geographical distribution of marine organisms, playing a crucial role in their survival.

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    Biogeographical distribution

    The distribution of marine organisms is affected by various factors, with water temperature being a major influence.

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    Study Notes

    The Seawater Environment and Ecological Adaptations

    • This chapter examines the physical and chemical properties of seawater and how they influence marine organisms' ecology.
    • Seawater environment factors: temperature, composition, density, viscosity, pressure, illumination, and movements. These interplay to create specific environmental conditions affecting animals, plants, and other organisms.
    • Seawater is easier to live in than freshwater or land. Early life likely arose in saltwater, due to its support for diverse life forms.
    • Water provides support to gelatinous organisms like plankton, reducing the need for complex skeletal or protective structures.
    • Light is a limiting factor in the ocean, except for surface and shallow water.
    • Physical conditions are relatively constant over large distances. This allows wide distributions for many marine species but also precise environmental requirements for others, limiting their range to specific conditions.
    • Two major gradients exist within the ocean: geographical (tropics to poles) and depth-wise (surface to seabed). These gradients influence factors like temperature, illumination, and salinity.

    Topic Subtitle 2: Temperature

    • Ocean surface temperatures (SSTs) vary geographically, highest near the equator (26°C-30°C) which can exceed 50°C in shallow regions like the Arabian Gulf during summer.
    • In high latitudes, seawater freezes at -1.91°C at a salinity of 35%.
    • Extreme temperature variations are in the ~30°C-35°C range excluding shore areas and specific hot vents, unlike the 150°C land temperature range.
    • Middle latitude surface waters have seasonal temperature changes of ~10°C (e.g., ~7°C in winter, ~16°C in summer, off the southwest coast of the British Isles).
    • Deep water (2000 m+) remains consistently cold (~-1.9°C to 4°C) in most cases.
    • Exceptionally high-temperature anomalies, 56°C, are observed in some deep-sea locations such as in the Discovery and Atlantis II Deep.

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    Description

    Test your knowledge on the temperature variations of the marine environment, including deep ocean water and seasonal changes. This quiz covers concepts like thermoclines, submarine volcanism, and the temperature characteristics of various ocean regions.

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