Chapter 2 Online quizzes

The primary producers in an ecosystem capture 33,500 units of energy. Assuming average efficiency of energy transfer, which of the following answers likely indicates the units of energy converted into secondary consumer biomass?

3,350

335

33.5

3.35

Name the three levels of biodiversity:

Producers, consumers and decomposers

Carnivores, herbivores and piscivores

Genetic, ecosystem and species diversity

Atmosphere, biosphere, pedosphere

Which of the following lists is correctly ordered based on taxonomic classification? (Not all levels are included.)

Domain - Kingdom - Phylum - Class - Order - Family

Domain - Kingdom - Class - Order - Genus - Family

Species - Genus - Order - Family - Class - Kingdom

Species - Genus - Domain - Family - Class - Kingdom

With regards to productivity of an ecosystem, which of the following statements is accurate?

NPP is lower than GPP because of plant respiration.

NPP is lower than GPP because of photosynthesis.

GPP is lower than NPP because of photosynthesis.

GPP is lower than GPP because of plant respiration.

What are the four broad categories of ecosystem services?

Provisioning, regulating, supporting and social

Provisioning, regenerating, supporting and cultural

Provisioning, regenerating, supporting and social

Provisioning, regulating, supporting and cultural

Which of the following is true with regards to Human Appropriated Net Primary Production (HANPP)?

NPP₀ is always higher than NPP_act

HANPP = NPP₀ - NPP_LUC

NPP_tis the amount of harvested NPP

HANPP = NPP₀ - NPP_act

Which of the following definitions of ecosystem resilience is correct?

Ecosystem resilience refers to an ecosystem that is able withstand environmental pressures, and can recover quickly from any disturbances.

Ecosystem resilience refers to an ecosystem in which biodiversity provides key ecosystem services.

Ecosystem resilience refers to the objectives of conserving biodiversity and wildlife-friendly food production within the same landscape.

Ecosystem resilience refers to food systems in which conserving biodiversity and food production is segregated within the landscape

Which of the following statements is correct with regards to invasive species?

Invasive species are always species which have been introduced on purpose into an ecosystem, for example to battle agricultural pests.

Invasive species can have an impact on biodiversity in many ways, including decreasing the abundance of native species through competition or predation

Invasive species do not have to thrive in the ecosystems they have been introduced.

All of the options given are correct

Which of the following statements is not a correct example of an ecosystem approach to biodiversity conservation?

The ecosystem approach may focus on keystone species.

The ecosystem approach may focus on biodiversity hotspots.

The ecosystem approach targets conservation at the level of communities, habitats, or entire ecosystems, rather than individual species.

All of the options given are correct

Which of the following statements about niche theory is not correct?

Niche theory is a leading theory to explain the diversity of species

Niche theory assumes that organisms reduce competition by avoiding specialisation.

A niche may already result in speciation if only one of the components (abiotic or biotic) is different.

Niche theory assumes that by specialisation or adaptation towards a specific niche, organisms reduce competition.

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