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Environmental Impact of Pollutants

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Questions and Answers

What is the ultimate result of chronic exposure to pollutants?

Enhanced reproduction and mortality

Increased population sizes

Improved ecosystem health

Damage and inactivation of DNA, proteins, and lipids (correct)

What is the main reason why the effects of synthetic chemicals on ecosystems are underestimated?

Inadequate research methods

Ignorance among ecologists and a tiny effort put into chemicals (correct)

Insufficient data on aquatic systems

Lack of funding for research

What is the primary source of nitrogen that affects ecosystems?

Food production (agriculture) (correct)

Wastewater treatment

Industrial processes

Fossil energy use

What is the predicted impact of insect biomass decline on birds?

Indirect negative effects through reduced insect biomass Signup and view all the answers

Why is the Netherlands one of the biggest users of pesticides in kg/ha in Europe?

As a result of a small country with a lot of agriculture land Signup and view all the answers

What is a common characteristic of persistent organic pollutants (POP)?

They persist in the environment for a long time Signup and view all the answers

What is the main reason why bats are used as bioindicators of heavy metal pollution?

They are long-lived and have a rapid metabolism, making them sensitive to bioaccumulation Signup and view all the answers

What is the unifying feature underlying the toxic actions of most pollutants?

Oxidative stress Signup and view all the answers

What is the result of PCBs and DDTs being found in coastal condors?

They are bioaccumulating pollutants through the food chain Signup and view all the answers

What is the reason for the decline in wild bird populations and their ecosystems under POP stress?

The exact reason is still unavailable due to lack of research Signup and view all the answers