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?
Climate change is causing an increase in these two things (need both!)
What are temperature and sea level?
These species out-compete native species
What are invasive species?
What is decreases?
Define ED50
What is the dose that causes a non-lethal effect in 50% of the pop. being tested
When the Air Quality Index is high, an increase in these two factors is seen (name one)
What is cardiovascular disease or death (mortality)
Methane is released from this source as the planet warms
What is the melting of permafrost?
This is causing shifts in biomes, habitat ranges, and temperature and precipitation patterns
What is climate change?
What is the increase of atmospheric CO2 by humans
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?
In addition to melting of ice, this is another cause of sea level rise
What is thermal expansion?
Excessive hunting and poaching is called this
What is over-exploitation?
This causes coral bleaching
What is an increase in ocean temperatures?
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.
Describe how the pH of the ocean is changing
The pH of the ocean is decreasing - it is becoming more acidic due to CO2 causing an increase in carbonic acid
This is occurs when larger habitats are broken into smaller, isolated patches
What is habitat fragmentation?
Biodiversity is _____ in edge habitats
What is increased?
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 positive feedback loop that is causing the poles to warm faster than the rest of the planet
What is loss of ice and snow (high albedo), decreasing reflection of sunlight away and resulting in land / ocean exposure (low albedo) causing an increase in heat absorption
What does HIPPCO stand for?
What is Habitat Fragmentation, Invasive Species, Population Growth, Pollution, Climate Change, and Over-exploitation
In addition to protecting and connecting habitats, name another way to improve biodiversity
What is sustainable land use or restoring lost habitats?