questions and answers
fishing down the food web means overharvesting what first✔✔top predators
A genetic bottleneck occurs when a species reaches a small population with high
genetic variation which can then support high future adapability✔✔false
the tragedy of commons✔✔self-interest consumers deplete a shared source
what is NOT an example of a regulation that prevents the tragedy of
commons?✔✔allowing harvesters to act rationally in their own self-interest
What differentiates the definitions for non native species from invasive
species✔✔impact on native species and ecosystems
The enemy release hypothesis posits that introduced species become invasive
because✔✔they leave behind native predators or pathogens
What is NOT a normal trait of an invasive species✔✔specialist diet
a major impact of invasive species is the biotic homogenization of biodiversity
around the world✔✔true
what does SIR stand for in epidemiological models✔✔Susceptible, infected, and
resistant
Which statement is correct?✔✔Most emerging infectious diseases come from
animals
The three important components of disease emergence from wildlife are higher
contact rates, higher biodiveristy, and intrusions into wilderness areas✔✔true
what is NOT a potential effect of environmental change on human
disease✔✔medicating livestock reduces the risks of antibiotic-resistant bacteria to
humans
Which is not one of the Evil Quartet✔✔sustainable harvesting
Why might in-situ conservation be used?✔✔for species that can live with relatively
low human interactions
which activities are allowed in National Parks✔✔hiking
When might ex-situ conservation be adventageous✔✔when species require
controlled food and care to survive
, what is NOT a goal of the convention on Biological Diversity✔✔Protecting 10% of
land habitats
sustainability, according to the CSD, is meeting the needs of the future while
compromising the needs of the present✔✔false
the Paris Agreement was different than the kyoto protocol in that it✔✔is based on
voluntary nationally determined contributions to address climate change
what is as important as a prediction✔✔understanding the uncertainty
what is the principle by which you avoid irreversible or really negative impacts even if
the probability might be low✔✔precautionary
what is NOT true about scenerios✔✔there should generally be just one best guess
for a future scenerio
what is NOT a potential problem with scenario development✔✔often predict worse
consequences than reality
what is the process called when N2 gas is incorporated into organic matter by micro-
organisms✔✔Fixation
The process by which N2 is industrially fixed to create ammonia fertilizer is called the
Hammer-Bosch process✔✔false
what is the biggest source of sink phosphorus✔✔Rock, ocean seafloor
what are eutrophic lakes characterized by✔✔high nutrients, cyanobacteria, biological
oxygen deman
the gulf of mexico dead zone occurs because✔✔of high biological oxygen demand
from algae fueled by Midwest fertilizer
What land type contributes the most nitrogen and phosphorus to aquatic
systems✔✔Agriculture
what is hypoxia✔✔low dissolved oxygen in aquatic systems
nitrogen leaching from home septic systems is NOT yet an important source of
harmful algal✔✔false
ocean acidification is due to✔✔formation of carbonic acid when human generated
CO2 dissolves in ocean water