Life on Land: Biomes, Climate, and Ecosystem Dynamics

What is ecology?

The study of interactions between organisms and their environment.

What are the main components of ecology?

Ecology of communities, individuals, ecosystems, populations, and landscapes.

What defines a biome?

A large geographic area characterized by specific climate, vegetation, and animal life.

What is the most important factor that defines biomes?

Climate, specifically temperature and precipitation.

What role do plants play in biomes?

Plants are primary producers, making energy from the sun available to other life forms.

What is convergent evolution in the context of biomes?

Different species develop similar functional traits due to similar selective pressures in similar environments.

What is the rain-shadow effect?

A phenomenon where one side of a mountain receives more rainfall than the other, affecting local climate.

What characterizes tropical rainforests?

Dense vegetation, high rainfall, and the highest primary productivity with low temperature variation.

What is a significant issue facing tropical rainforests?

Massive deforestation, particularly in the Amazon rainforest.

What are tropical dry forests known for?

Warm year-round with alternating wet and dry seasons, and richer soils than rainforests.

What defines a tropical savanna?

Generally drier than dry forests, with scattered trees and cycles of wet and dry seasons.

What are the characteristics of deserts?

Highly arid conditions, low organic matter in soils, and flora/fauna adapted to low water availability.

What is desertification?

The gradual degradation of fertile land into arid desert due to climate change and human activities.

What is the climate in woodland/shrubland biomes?

Cool and moist during fall-spring, moderately hot and dry during summer.

What defines temperate grasslands?

Massive seas of grass with rain occurring most heavily in summer and dominated by herbaceous vegetation.

What are the characteristics of temperate forests?

Mild winters, constant precipitation, and high primary productivity with rich soils.

What is the boreal forest also known as?

Taiga, characterized by evergreen conifers and low plant diversity.

What defines tundra biomes?

Open landscapes dominated by low vegetation, cold/dry climates, and a very short growing season.

What are the dominant plant types in tundra?

Mosses, lichens, and grasses, underlaid by permafrost.

What are the nine recognized terrestrial biomes?

Tropical rainforests, tropical dry forests, tropical savannas, deserts, shrublands, temperate grasslands, temperate forests, boreal forests, and tundra.

How does latitude affect biomes?

Temperature and precipitation are strongly associated with latitude, influencing ecosystem characteristics.

What is the significance of the Coriolis effect in biomes?

It affects wind patterns and climate, influencing the distribution of biomes.

What is the role of climate diagrams?

They diagram seasonal variations in temperature and precipitation, aiding in understanding biomes.

What is the primary productivity of tropical rainforests?

They have the highest primary productivity among terrestrial biomes.

What is a key feature of the soils in tropical rainforests?

Typically nutrient-poor with a thin layer of organic matter.

What is the impact of human activities on biomes?

Human activities, such as deforestation and climate change, significantly alter and threaten biomes.

What are some adaptations of desert plants?

Many species have adaptations for water collection and low water use efficiency.

What is the primary vegetation type in boreal forests?

Dominated by evergreen conifers.