HIPPO and Biodiversity

Which of these is not one of the 5 major reasons why species become endangered?

• Habitat loss
• Pollution
• Overconsumption
• Native species

The process by which the concentration of toxins increases at each successive level of the food chain is:

• Bioaccumulation
• Genetic Diversity
• Overconsumption
• Biomagnification

Which organism in this food chain would have the highest concentration of methylmercury?

• Large shark
• Small fish
• Mackerel
• Phytoplankton

An organism that is gone from a part of its native range (such as elk in PA) is called:

• Extinct
• Extirpated
• Extant
• Endangered

Humans have an effect on ecosystems when they use native grasslands or forested areas for urban development.  One negative effect of these changes on the ecosystem is that there will be:

• Successful economic growth
• Increased food production
• Less biodiversity
• More population growth

According to the graph, which two species would be most likely to survive if their environmental conditions changed?

• Tasmanian tiger and Tasmanian devil
• Tasmanian tiger and wolf
• Brown bear and whale
• Panda and wolf

African elephants are poached for their ivory tusks.  The main reason they have become endangered is:

• Pollution
• Population Growth of Humans
• Overconsumption
• Invasive species

The biomagnification of which US pesticide in the 1960's and early 1970's was responsible for the decline in bald eagles and brown pelicans?

• Methylmercury
• PCB's
• DDT
• Aluminum

Which of the following is NOT a reason why invasive species may become easily established in their new ecosystems?

• Successful invasive species are usually specialists (require a specific habitat and food)
• High reproductive rates
• No natural predators 
• Good dispersal ability

Which of the following is NOT an invasive species in PA?

• Zebra mussel
• Emerald ash borer
• Sea Lamprey
• Lake trout