Ecosystems: Biodiversity, Food Chains, Energy Flow, Bioaccumulation Quiz

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12 Questions

What does biodiversity refer to in an ecosystem?

The variety of life forms in the ecosystem

In a food chain, what role do herbivores play?

They consume primary producers

Which statement best describes energy flow in ecosystems?

Energy is transferred from one level to the next in a unidirectional manner

What is bioaccumulation in an ecosystem?

The buildup of toxins in organisms as they consume contaminated prey

How does biodiversity contribute to ecosystem resilience?

By increasing stability and adaptability

What poses a potential threat to ecosystems according to the text?

Intruders disrupting ecosystem balance

What is the main source of energy for ecosystems?


Which process involves the build-up of toxins or pollutants in living organisms over time?


What can disrupt ecosystems by outcompeting native species and altering ecosystem functions?

Invasive species

How does habitat destruction impact ecosystems?

Reduces biodiversity and fragments ecosystems

Which organisms often experience higher levels of bioaccumulation due to consuming lower trophic level organisms that have taken up pollutants?

Top predators

Why is understanding energy flow important in ecosystems?

To appreciate biodiversity

Study Notes

Ecosystems: Exploring Biodiversity, Food Chains, Energy Flow, Bioaccumulation, and Intruders

Ecosystems are complex webs of interactions between living organisms and their environment. They're a crucial part of our planet's health, supporting a diverse array of life forms. Let's delve deeper into various facets of ecosystems, starting with biodiversity, food chains, energy flow, bioaccumulation, and potential threats posed by intruders.


Biodiversity, short for biological diversity, refers to the variety of life forms that inhabit a particular ecosystem. A healthy ecosystem is characterized by a high level of biodiversity, which provides stability and resilience. Biodiversity allows ecosystems to adapt and recover from disturbances, such as natural disasters or human interference.

Food Chains

Food chains describe the pathways by which energy and nutrients flow through an ecosystem. Energy flow in ecosystems starts from the sun, which is absorbed by primary producers (such as plants). Primary producers are then consumed by herbivores, who in turn become food for carnivores. Energy is transferred from one level to the next, resulting in a complex food web. Food chains and webs help us understand how ecosystems function and how energy and nutrients cycle through them.

Energy Flow

Energy flow, a concept closely related to food chains, describes how energy moves through an ecosystem. As mentioned above, energy begins with the sun and eventually flows through a series of organisms until it is ultimately dissipated, mainly as heat. Understanding energy flow in ecosystems helps us appreciate the interconnectedness of all life forms.


Bioaccumulation is the process by which toxins or pollutants build up in the tissues of living organisms over time. Bioaccumulation can lead to a variety of adverse effects, including illness, reduced fertility, and even death. Organisms at higher trophic levels (such as top predators) often experience higher levels of bioaccumulation because they consume a greater amount of lower trophic level organisms that have taken up pollutants.

Intruders in an Ecosystem

Ecosystems are dynamic systems that can be disrupted by the introduction of invasive species, pollution, habitat destruction, and other factors. Invasive species can outcompete native species, drive them to extinction, and alter the structure and function of ecosystems. Pollution can lead to a variety of adverse effects, including bioaccumulation and the disruption of food chains. Habitat destruction can fragment ecosystems, reducing biodiversity and making ecosystems more susceptible to other threats.


Ecosystems are complex systems that support a diverse array of life forms. Understanding the concept of biodiversity, food chains, energy flow, bioaccumulation, and intruders is essential for appreciating the beauty and complexity of ecosystems. By understanding these concepts, we can better protect and conserve our planet's natural resources and ensure the survival of the diverse life forms that inhabit our planet.

Explore the intricate relationships within ecosystems, focusing on biodiversity, food chains, energy flow, bioaccumulation, and the impact of intruders such as invasive species. Learn about how these elements interact to sustain life forms and the challenges they face.

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