Ecosystems Around the World - Chapter Overview

All the living organisms in a place and the interactions between them and their physical environment.

Group of organisms of different species that live in the same habitat.

A place where organisms live or shelter for the organisms.

<p>Total number of individuals of one species which live in one area.</p> Signup and view all the answers

<p>Weather and climate (B)</p> Signup and view all the answers

<p>When plants or animals take up a chemical from the environment and do not excrete it, the chemical builds up in the organism over time to a potentially lethal level.</p> Signup and view all the answers

<p>Refers to the sequence of processes that results in higher concentrations of the chemical in organisms at higher levels in the food chain.</p> Signup and view all the answers

<p>Flow of energy in an ecosystem is one way process. The sequence of organism through which the energy flows, is known as food chain.</p> Signup and view all the answers

<p>True (A)</p> Signup and view all the answers

<p>Energy is passed from one trophic level to another (D)</p> Signup and view all the answers

<p>(i) Primary consumers (ii) Secondary consumers (iii) Tertiary consumers (iv) Quaternary consumers</p> Signup and view all the answers

<p>Organisms that break down organic matter.</p> Signup and view all the answers

<p>True (A)</p> Signup and view all the answers

<p>Food web in ocean (B)</p> Signup and view all the answers

<p>Graphical representations of the trophic structure of an ecosystem.</p> Signup and view all the answers

<p>Pyramid of biodiversity (A)</p> Signup and view all the answers

<p>The graphic representation of numbers of individuals per unit area of various trophic levels.</p> Signup and view all the answers

<p>False (B)</p> Signup and view all the answers

All the living organisms in a place and the interactions between them and their physical environment.

Group of organisms of different species that live in the same habitat.

A place where organisms live or shelter.

Total number of individuals of one species that live in one area.

The amount of space available for breeding can impact the growth of a population.

The lack of sufficient food can limit a population's growth.

Toxins, like pesticides, can build up in organisms over time.

The increase in concentration of a toxin as it moves up the food chain.

The flow of energy in an ecosystem is one-way, moving from producers to consumers.

Plants are called producers because they create their own food through photosynthesis.

Animals are called consumers because they cannot create their own food and must eat plants or other animals.

The first level of consumers, which eat plants.

The second level of consumers, which eat other consumers.

The third level of consumers, which eat secondary consumers.

The top level of consumers, which eat tertiary consumers.

Organisms that break down dead organic matter, releasing nutrients back into the ecosystem.

A network of interconnected food chains that shows the feeding relationships between organisms.

The lowest trophic level in a food web, consisting of producers.

The highest trophic level in a food web, consisting of top predators.

A graphical representation of the trophic structure of an ecosystem, showing the number of individuals at each trophic level.

A graphical representation of the biomass (total mass of organisms) present at each trophic level.

A graphical representation of the amount of energy flowing through each trophic level over a specific time period.

When an organism takes up a chemical from the environment and does not excrete it, the chemical builds up in the organism over time.

The increase in concentration of a toxin as it moves up the food chain, resulting in higher concentrations in top predators.

The disappearance of a species from an ecosystem.

The disturbance to the balance of trophic levels in an ecosystem, often due to changes in population size.

The process of breaking down complex carbon and nitrogen compounds into simple forms.

Decomposers recycle nutrients back into the ecosystem, making them available for other organisms.

Decomposers help to clean the environment by breaking down waste and dead organisms.