APES Unit 5
Which of the following is an unintended environmental consequence of aquaculture?
Contamination of surrounding water by organic waste
Overfishing of stocks of fish species, like salmon and cod, in an effort to meet a growing global demand has become an international concern. A recent estimate indicates that the average annual consumption of fish globally in 2014 was about twice the consumption in 1960. Because of increased concerns about the impact of overfishing, fishery managers are looking for ways to protect wild populations while still satisfying global demand for food for human consumption. Which of the following techniques could best reduce the harmful effects of overfishing if it were to be widely adopted by the fishing industry?
Increased use of long-line fishing techniques in the open ocean for harvesting swordfish and halibut
Growing two or more crops simultaneously on the same field is called what and serves what purpose?
Intercropping and it sends out chemicals to control pests
Industrial logging threatens many forested ecosystems. Which of the following environmental consequences will most likely result from clear-cutting deciduous forests for logging?
More carbon dioxide will be added to the atmosphere and increase anthropogenic climate change.
impacts of overfishing
Overfishing has led to the extreme scarcity of some fish species, which can lessen biodiversity in aquatic systems and harm people who depend on fishing for food and commerce. When too many fish are taken out of the ocean, it creates an imbalance that erodes the food web and leads to a loss of other importatn marine life
Which of the following would be the best way to mitigate deforestation?
Replant and protect trees in areas that have been previously cleared.
Biological controls are frequently used to replace persistent chemical pesticides. Which of the following represents the greatest potential risk of using biological controls?
The control agent attacks not only its intended target but also beneficial species
Which of the following is the best example of an economic approach to reduce overfishing for a fish species with a declining population?
The federal government sets a catch limit (per person or per boat) for the species and imposes a tax on any extra fish that are caught.
Which of the following is a commercially used method for harvesting trees and is most likely to lead to a fragmented landscape with serious impacts on biodiversity?
clear cutting
Sustainable use of forests in the United States would likely be encouraged by
cutting small groups of medium- and large- sized trees in uneven-aged forests
Two branches of a river have different sediment loads. Based on the diagram, which of the following most likely led to the differences in the amount of sediment in the two branches of the river?
deforestration from clear-cutting
aquaculture drawbacks
high concentration of waste (e coli, eutrophication) increase of disease risk, which can be transmitted to the wild may introduce non-native species to GMO's if fish escape fish are fed antibiotics which can contaminate water
Switching from customary large-scale agricultural practices to which of the following is most likely to reduce the exposure of farmworkers and nearby residents to toxic chemicals?
integrated pest management
The major cause for the decline in the worldwide catch of fish since 1990 is
overfishing
integrated pest management
pest control methods that minimize environmental disruption and pesticide use. includes biocontrol, crop rotation, and intercropping
aquaculture benefits
requires only a small amount of water, space, and fuel reduces risk of fishery collapse doesn't take up any land space
Impacts of commercial fishing
the water can become toxic and pesticides and parasites can be spread to surrounding areas, contaminating our oceans. Wild fish populations can get sick and die when parasites and chemicals are spread to them from these farms though the water.
Which of the following best explains why the maximum sustainable yield for ocean fisheries has been exceeded?
too many fish of reproductive age have been harvested
Which of the following changes to the local hydrologic cycle will result if large areas of land experienced clear-cutting?
Evaporation of water from the soil will increase.
Overfishing of stocks of fish species, like salmon and cod, in an effort to meet a growing global demand has become an international concern. A recent estimate indicates that the average annual consumption of fish globally in 2014 was about twice the consumption in 1960. Because of increased concerns about the impact of overfishing, fishery managers are looking for ways to protect wild populations while still satisfying global demand for food for human consumption. Aquaculture or fish farming can be used to increase the availability of species like salmon and shrimp for consumption. Although fish farming can have a number of negative environmental effects, it does offer a number of advantages. Which of the following is a valid reason for promoting the use of fish farms?
Fish production is constant, and fish farming reduces pressure on wild stocks
One way that consumers can help prevent a decrease in the number of fish species that are experiencing population declines is to
eat fish that are caught using sustainable harvesting methods, therefore ensuring fish populations remain stable and reducing the amount bycatch harvested
Biological control methods for managing insect pests are effective for reasons that include which of the following? I They promote genetic resistance in the target species, resulting in a population explosion of the target species. II They generally focus on one target insect to ensure that the target insect population remains low. III They can lead to a self-perpetuating population of a control species.
ll and lll
Biomagnification impacts
when an organism higher in the food chain consumes the lower organism containing such chemicals, the chemicals can get accumulated in the higher organism. it also makes human more prone to cancer, etc...