Problem 10 - Biology E/M

Question

Choose from the names of the biomes below. (A) Tropical rain forest (B) Taiga (C) Temperate grasslands (D) Marine (E) Tundra Called the permafrost

Step-by-Step Solution

Answer

(E) Tundra.

Step 1: Reading the Question

The problem presents a list of biomes and asks us to identify which one is called the permafrost.

Step 2: Understanding Permafrost

First, we need to understand 'permafrost.' Permafrost refers to ground that remains completely frozen for at least two consecutive years. This is a feature common in cold climate regions.

Step 3: Examining Biome Options

Let's consider the options provided: - (A) Tropical rain forest: This biome is warm and humid, lacking permafrost. - (B) Taiga: This biome, also known as boreal forest, has cold winters and some permafrost regions but not predominantly. - (C) Temperate grasslands: Characterized by moderate climate, this biome does not have permafrost. - (D) Marine: Refers to oceanic ecosystems, unrelated to permafrost. - (E) Tundra: Known for cold temperatures and a layer of soil that remains frozen year-round, it is best associated with permafrost.

Step 4: Choosing the Correct Biome

The Tundra biome has the characteristic of permafrost; therefore, the correct answer is (E) Tundra.

Key Concepts

Understanding Permafrost

Permafrost is a fascinating natural phenomenon found only in the coldest regions of the earth. It refers to ground—soil or rock—that remains frozen for at least two consecutive years. This frozen layer can be just a few centimeters or several meters deep, and it plays a critical role in the structure and ecology of the ecosystems where it is found.

Permafrost acts like a cement, hold soil particles together. It affects the vegetation that can grow in these areas, as only plants with shallow root systems can survive.

In the summertime, the top layer of permafrost can melt slightly, creating a soggy surface layer known as the "active layer." This seasonal thaw supports a unique range of plant and animal life that has adapted to these rigorous conditions. The presence of permafrost also significantly influences the hydrology of the environment, often leading to the formation of wetlands and peat bogs.

Tundra Biome Characteristics

The tundra is a unique biome primarily found in the Arctic and Antarctic regions, as well as atop high mountain ranges at all latitudes. It is easily identifiable by its sparse landscape and extremely cold climate, making it one of the earth's harshest environments for plant and animal life.

This biome has a very short growing season, sometimes only a few weeks. Due to this, vegetation is limited to hardy species like lichen, moss, grasses, and dwarf shrubs. These plants are adapted to the thin layer of soil above the permafrost.

The tundra is not just cold but also dry, often defined as a "cold desert," receiving similar precipitation levels to arid regions. Despite these conditions, the tundra supports a unique ecosystem, including animals like polar bears, arctic foxes, and migratory birds.

• Short, cool summers
• Long, harsh winters
• Limited tree growth due to the permafrost
• Presence of ice and snow for most parts of the year

The tundra is highly susceptible to climate change, with rising temperatures leading to the thawing of permafrost, which can disrupt local ecosystems and affect global climate patterns due to the release of stored carbon dioxide and methane.

Exploring Earth's Biomes

Biomes are the distinct regions on earth that share similar climate, plant, and animal life. They are one of the primary methods ecologists use to divide the planet’s surface into different environments.

Each biome has a unique set of characteristics and hosts specially adapted plants and animals.

• Tropical Rainforest: Warm, humid, and lush with dense vegetation.
• Taiga (Boreal Forest): Cold with coniferous trees and moderate precipitation.
• Temperate Grasslands: Characterized by grass species, moderate rainfall, and rich soils.
• Marine: Vast underwater ecosystems, including oceans and coral reefs.
• Tundra: Cold, barren landscape with permafrost.

Each biome supports life forms that are well-suited to its environment. For example, only animals with thick fur or special adaptations survive in the tundra, while those in the rainforest have adapted to warm and wet conditions.

Studying these biomes helps us understand the diversity of life on earth and how different species interact within their ecosystems. It's also crucial for understanding the impacts of environmental changes across the planet.