Exam 2 Flashcards
(30 cards)
Over harvesting causes extinction and is most likely to affect:
Large animals with low intrinsic reproduction rates
Which of the following is the most common limiting nutrient in freshwater systems?
Phosphorus
Which of the following is the largest anthropogenic source of carbon dioxide?
fossil fuel use
Which greenhouse gas is also responsible for depleting levels of ozone in the upper atmosphere?
methane
Global climate change is best described as
a warming planet caused by burning of fossil fuels
The single greatest threat to biodiversity on Earth is
habitat loss
Greenhouse gasses are those that….
absorb and reflect infrared light back to Earth
The oxygen we breathe is provided by natural biological communities. This is an example of
ecosystem services
To make some extra funds over break you have decided to gamble on the date when the ice will melt on Joe’s Pond in Spring 2023. Given your insider knowledge as a scientist, you should bet on
an earlier date than in the past
Climate models for our region in the United States predict
What is the term defining the amount of light energy converted to chemical energy by autotrophs?
primary production
The most important factors controlling plant growth in terrestrial systems are
What are the three largest causes of species extinction
habitat loss
Over harvesting
Invasive species
Which are examples of invasive species in North America?
Zebra mussel
House sparrow
Ways to prevent eutrophication and harmful algal blooms include reducing
impervious surfaces
septic tank failure
Lawn fertilizer use
What are common characteristics of invasive species?
high reproductive output
Adaptivity
Rapid dispersal
Which of the following statements about the earth’s ozone layer is true?
Largest reservoir is the ocean
Water
Human activities have directly increased the gas phase
Carbon
Largest reservoir is the atmosphere
Nitrogen
Is most often the limitingnutrient in fresh water systems
Phosphorus
Released as a gas in volcanic eruptions
Sulfur
Dropped from airplanes on Guam
Brown tree snakes
Put ashore on tropical islands
Cattle, sheep, and goats
