LD50
Define LD50
What is the dose or concentration of the chemical that kills 50% of the population being studied.
Exposure to asbestos can lead to this disease
What is mesothelioma?
This net based fishing activity can adversely impact coral reefs
What is bottom trawling?
Name the two primary nutrients that lead to eutrophication
What are Nitrogen and Phosphorus?
Describe the relationship between temperature and DO.
What is that they have an inverse relationship?
What is that as temperature increases, DO decreases?
Define ED50
What is the dose that causes a non-lethal effect in 50% of the pop. being tested
Name a medical condition impacting humans that occurs more frequently when the Air Quality Index is high
What is cardiovascular disease or death (mortality)
Name two negative environmental effects of an oil spill
What are:
- death of marine organisms
- Decreased visibility / photosynthesis
- Oil sticking to bird feathers
Anthropogenic nutrient pollution leads to this specific form of eutrophication
What is cultural eutrophication?
This toxin has been observed to bioaccumulate in marine species, especially bluefin tuna
What is mercury, or methylmercury?
On a dose curve graph, how do you find the LD50?
Discharge of raw sewage into rivers can lead to this bacterial infection
What is dysentery?
This oil spill cleanup method removes the pollution from the water, only to put it into the atmosphere instead
What is burning off the surface oil?
The decomposition associated with eutrophication causes an increase in the levels of this greenhouse gas
What is carbon dioxide?
Biodiversity is _____ in edge habitats
What is increased?
The higher the LD50, the _____ toxic a substance is
What is less? Smaller LD50 = more toxic
Name a way in which antibiotic resistance increases
Over-prescribing antibiotics. Unfinished treatment with antibiotics. Overuse in livestock and fish farming. Lack of hygiene. Poor infection control. Lack of new antibiotic development.
Water from you bath or a washing machine is classified as this
What is gray water?
Eutrophication results in hypoxia due to bacteria which break down decomposing material in this manner
What is aerobically?
This law, also known as Superfund, provides the framework for the cleanup of hazardous waste sites in the United States
What is CERCLA?
What is the Comprehensive Environmental Response, Compensation, and Liability Act?
This is the lowest dose where an effect starts to occur
What is the toxicity threshold?
Of the following substance, name the most toxic: Mercury, PCBs, Arsenic, Lead
What is Arsenic?
Describe the relationship between BOD and DO
What is as BOD increases, DO decreases?
Also accept: INVERSE relationship
Succession naturally causes eutrophication in these waterways
What are oligotrophic waterways?
In addition to protecting and connecting habitats, name another way to improve biodiversity
What is sustainable land use or restoring lost habitats?