11. explain the “rain shadow” effect.
12. what effect does elevation have on climate? why do we say that hiking from gatlinburg, tennessee, at 393 meters of elevation in the smoky mountains region, to the top of mount leconte, at 2010 meters, is like traveling to canada?
concept 52.3 aquatic biomes are diverse and dynamic systems that cover most of earth
13. what is a biome?
14. what is the largest marine biome, and how much of earth’s surface does it cover?
15. as you read this section and study figure 52.18, you will encounter a number of new terms. distinguish between each of the following pairs of terms:
photic/aphotic
benthic/pelagic
oligotrophic/eutrophic
littoral zone/limnetic zone
zooplankton/phytoplankton
neritic/abyssal

Question

Accepted Answer

### Question 11: Explain the “rain shadow” effect.
# Brief Explanations:
The rain shadow effect occurs when moist air from an ocean or large body of water is forced to rise over a mountain range. As the air rises, it cools and condenses, causing precipitation on the windward (near - ocean) side of the mountains. After crossing the mountains, the air descends on the leeward side, warms up, and becomes drier, creating a dry area (rain shadow) on the leeward side.
# Answer:
The rain shadow effect is a phenomenon where a mountain range causes moist air to rise, cool, and precipitate on the windward side, while the leeward side gets dry air and less precipitation, forming a dry region (rain shadow) due to the descending, warming, and drying of air after crossing the mountains.

### Question 12: What effect does elevation have on climate? Why do we say that hiking from Gatlinburg, Tennessee, at 393 meters of elevation in the Smoky Mountains region, to the top of Mount LeConte, at 2010 meters, is like traveling to Canada?
# Brief Explanations:
- **Effect of elevation on climate**: As elevation increases, the atmosphere becomes thinner, so it can hold less heat. Generally, for every 1000 - meter increase in elevation, the temperature drops by about $6^\circ\text{C}$. Also, higher elevations can have different precipitation patterns and wind conditions.
- **Hiking analogy**: The temperature at higher elevations (like the top of Mount LeConte) is much lower than at lower elevations (Gatlinburg). Canada has a generally cooler climate compared to Tennessee at lower elevations. The significant increase in elevation from Gatlinburg to Mount LeConte leads to a large drop in temperature, similar to the temperature difference between Tennessee (lower elevation, warmer) and Canada (cooler), so the hike is like traveling to a cooler - climate region like Canada.
# Answer:
- Elevation effect: Temperature decreases (≈$6^\circ\text{C}$/1000m) with increasing elevation; air is thinner, less heat - retaining. Precipitation/wind patterns also change.
- Hiking analogy: The temperature drops significantly with the elevation gain (from 393m to 2010m), making the top of Mount LeConte as cool as Canada (which has a cooler climate than low - elevation Tennessee), so the hike resembles traveling to Canada.

### Question 13: What is a biome?
# Brief Explanations:
A biome is a large - scale ecological community characterized by distinct climate conditions and specific types of plants and animals that are adapted to those conditions. Biomes are defined by factors such as temperature, precipitation, and the dominant vegetation (e.g., tropical rainforest, desert, tundra, grassland). These communities cover large geographic areas and have relatively uniform environmental conditions and species assemblages.
# Answer:
A biome is a large - scale ecological community with distinct climate, adapted plants, and animals, covering a large area (e.g., tropical rainforest, desert), defined by climate (temp, precipitation) and dominant vegetation.

### Question 14: What is the largest marine biome, and how much of Earth’s surface does it cover?
# Brief Explanations:
The largest marine biome is the open ocean (pelagic zone), specifically the oceanic zone (beyond the continental shelf). The open ocean covers about 70% of the Earth's surface (and the ocean as a whole covers about 71% of the Earth's surface, with the open ocean being the major part of the ocean biome).
# Answer:
The largest marine biome is the open ocean (oceanic zone). It covers about 70% (or about 71% when considering the entire ocean) of the Earth's surface.

### Question 15: Distinguish between each of the following pairs of terms:
#### (1) photic/aphotic
# Brief Explanations:
- **Photic zone**: The upper layer of an aquatic ecosystem where light penetrates sufficiently for photosynthesis to occur. It is the well - lit part of the water body (e.g., in the ocean, the upper part where phytoplankton can live and photosynthesize).
- **Aphotic zone**: The part of an aquatic ecosystem where light does not penetrate enough for photosynthesis. It is the dark layer of the water body (e.g., the deep - sea regions where there is no light for photosynthetic organisms).
# Answer:
- Photic: Aquatic zone with enough light for photosynthesis (well - lit, upper layer).
- Aphotic: Aquatic zone with insufficient light for photosynthesis (dark, lower layer).

#### (2) benthic/pelagic
# Brief Explanations:
- **Benthic zone**: The ecological region at the bottom of an aquatic body (ocean, lake, etc.). It includes the sediment surface and the sub - surface layers. Organisms in this zone are called benthos (e.g., sea stars, clams on the ocean floor).
- **Pelagic zone**: The open - water region of an aquatic body, away from the bottom and the shore. It is divided into different depth - related sub - zones and is home to organisms like plankton and large swimming animals (nekton) like fish.
# Answer:
- Benthic: Zone at the bottom of an aquatic body (sediment - associated, e.g., ocean/lake floor).
- Pelagic: Open - water zone (away from bottom/shore, e.g., ocean/lake water column).

#### (3) oligotrophic/eutrophic
# Brief Explanations:
- **Oligotrophic**: Describes a body of water (like a lake) that has low nutrient levels (especially nitrogen and phosphorus), low primary productivity, and clear water (e.g., deep mountain lakes with little nutrient input).
- **Eutrophic**: Describes a body of water with high nutrient levels, high primary productivity (often leading to algal blooms), and often murkier water due to the high biological activity (e.g., lakes near agricultural areas with runoff - related nutrient input).
# Answer:
- Oligotrophic: Aquatic system with low nutrients, low productivity, clear water (e.g., mountain lakes).
- Eutrophic: Aquatic system with high nutrients, high productivity, murky water (e.g., lakes with agricultural runoff).

#### (4) littoral zone/limnetic zone
# Brief Explanations:
- **Littoral zone**: The shallow, near - shore region of a lake or pond, where light reaches the bottom and aquatic plants can grow rooted in the sediment. It has a high diversity of organisms due to the presence of both aquatic and terrestrial - associated species.
- **Limnetic zone**: The open - water region of a lake or pond, away from the shore, in the well - lit (photic) area but beyond the littoral zone. It is dominated by plankton and nekton (swimming organisms) and does not have rooted plants (since it is too deep for roots to reach the bottom in most cases).
# Answer:
- Littoral: Shallow, near - shore lake/pond zone, rooted plants, diverse organisms.
- Limnetic: Open - water lake/pond zone, no rooted plants, plankton/nekton - dominated.

#### (5) zooplankton/phytoplankton
# Brief Explanations:
- **Zooplankton**: Small, floating or weakly swimming animals in aquatic ecosystems. They are heterotrophic, feeding on other organisms (like phytoplankton or other zooplankton). Examples include copepods, krill, and the larvae of many aquatic animals.
- **Phytoplankton**: Small, floating or weakly swimming photosynthetic organisms (algae, cyanobacteria) in aquatic ecosystems. They are autotrophic, producing organic matter through photosynthesis and forming the base of the aquatic food web.
# Answer:
- Zooplankton: Small aquatic animals (heterotrophic, e.g., copepods, krill).
- Phytoplankton: Small photosynthetic organisms (autotrophic, e.g., algae, cyanobacteria).

#### (6) neritic/abyssal
# Brief Explanations:
- **Neritic zone**: The marine zone that extends from the shore to the edge of the continental shelf (up to about 200 meters depth). It is a relatively shallow marine region with high productivity due to the presence of nutrients from the land runoff and the shallowness allowing light to reach the bottom in some areas.
- **Abyssal zone**: The deep - sea zone (at depths of about 4000 - 6000 meters) of the ocean. It is a cold, dark, and high - pressure environment with very low productivity and unique, adapted organisms (e.g., deep - sea anglerfish, giant tube worms).
# Answer:
- Neritic: Shallow marine zone (shore to continental shelf, ≤200m), productive.
- Abyssal: Deep - sea zone (4000 - 6000m), cold, dark, low productivity.

Sovi.AI - AI Math Tutor

QUESTION IMAGE

Question

Explanation:

Question 11: Explain the “rain shadow” effect.

Answer:

Question 12: What effect does elevation have on climate? Why do we say that hiking from Gatlinburg, Tennessee, at 393 meters of elevation in the Smoky Mountains region, to the top of Mount LeConte, at 2010 meters, is like traveling to Canada?