Ecología Segunda Unidad: Ecosistemas

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What percentage of energy is transferred from one trophic level to the next?

20%

50%

90%

10% (correct)

What is the name given to the circular movement of elements and compounds in ecosystems?

Elemental pathways

Biogeochemical cycles (correct)

Nutrient cycles

Ecological cycles

What is the primary component of the atmosphere?

Gases (correct)

Water

Solids

Liquids

What is the term for the flow of materials from the environment to organisms and back to the environment?

Flujo de materia Signup and view all the answers

What is the name of the models that show the relationships between organisms in an ecosystem?

Ecological pyramids Signup and view all the answers

What is the purpose of the majority of the energy transferred between trophic levels?

To fuel the metabolism of organisms Signup and view all the answers

What is the main difference between primary and secondary succession?

Secondary succession occurs in areas with existing vegetation. Signup and view all the answers

What is a community called when it reaches relative stability?

Community climax Signup and view all the answers

What is an example of an area where secondary succession might occur?

An abandoned farm field Signup and view all the answers

According to the LGEEPA, what is environmental impact defined as?

The modification of the environment caused by human or natural actions Signup and view all the answers

What is an effect of environmental deterioration?

Negative impacts on human health Signup and view all the answers

What is altered in an ecosystem as a result of environmental impact?

The structure and function of the ecosystem Signup and view all the answers

What has been the approximate reduction in the Arctic ice cap in the last 30 years?

3 million km2 Signup and view all the answers

What is the reason for the increase in frequency and intensity of tropical storms and hurricanes?

Increase in global temperature Signup and view all the answers

What happens to rainfall patterns as a result of global warming?

They become less predictable Signup and view all the answers

What is the estimated number of people living in extreme drought conditions?

400 million Signup and view all the answers

What is one of the health impacts of global warming?

Increase in infectious diseases Signup and view all the answers

What is one of the economic impacts of global warming?

Damage to buildings and infrastructure Signup and view all the answers

What is a predicted consequence of climate change?

Scarcity of food and water worldwide Signup and view all the answers

What is the main cause of environmental problems like pollution, greenhouse effect, and global warming?

Irresponsible use of natural resources Signup and view all the answers

Who developed the concept of ecological footprint?

William Rees and Mathis Wackernagel Signup and view all the answers

What does the ecological footprint measure?

The consumption of natural resources by individuals Signup and view all the answers

In what unit is the ecological footprint measured?

Hectares Signup and view all the answers

Why is it important to reduce our ecological footprint?

To preserve resources for future generations Signup and view all the answers

What is an ecosystem?

A community of organisms that interact with their physical environment Signup and view all the answers

What are biotic factors in an ecosystem?

Groups of organisms that perform different activities Signup and view all the answers

What is an example of an abiotic factor in an ecosystem?

The amount of sunlight available Signup and view all the answers

What are the different types of ecosystems known as?

Biomes Signup and view all the answers

What are natural ecosystems characterized as?

Natural, self-sufficient, stable, and long-lasting Signup and view all the answers

How can ecosystems be classified in terms of human interaction?

Natural, rural, and urban Signup and view all the answers