Do Now:Friday 4/23

Which ecosystem is this? : Generally located in shallow, tropical waters; very high species diversity; most species rely in some way on the polyp-like keystone species

• Estuary

• Open ocean

• Wetlands

• Coral reefs

Which ecosystem is this? : These ecosystems are the areas of shorelines that are left uncovered during low tide but which are underwater during high tide; they are usually rocky, but in tropical areas they may be sandy; organisms that live here need to adapt to the waves, the sun, and both marine and land predators

• Deep sea

• Open ocean

• Intertidal zone

• Coral reefs

Which ecosystem is this? : These ecosystems occur where rivers connect with oceans; the flows of nutrients carried by the rivers make these ecosystems some of the most nutrient-rich and bio-productive areas on Earth; many species live here, and many more will come here each year to breed and raise their young

• Wetlands

• Open ocean

• Intertidal zone

• Estuaries

Which of the following is true of estuary ecosystems?

• They are often referred to as the "nurseries of the sea"

• They often do not have enough nutrients for plants to survive

• They often do not provide enough food for carnivores such as seabirds

• They are not affected by expanding cities and human development

The base of the food web in open ocean ecosystems is:

• Mangrove trees

• Phytoplankton

• Sea grass

• Zooplankton

Which of the following is TRUE of coral reef ecosystems?

• Contain low species diversity

• Found mostly in polar regions

• Threatened by human activities such as ocean mining and blast fishing

• Highly resistant to changes in water temperature and pH

All of the following are factors that organisms in intertidal zones need to deal with EXCEPT:

• Extremely high salinity as tide pools evaporate

• Extreme changes in temperature

• Constant wind and waves

• Low levels of sunlight

a reef close to and surrounding newer volcanic islands or that boarders continental landmasses

• fringing reef

• barrier reef

• patch reef

• atoll

a reef separated by a lagoon from the land mass with which it is associated

• fringing reef

• barrier reef

• patch reef

• atoll

the gradual wearing away of a coral reef by the action of living organism (bioerosion) and physical factors such as storms

• climate change

• ocean acidification

• reef erosion

• bleaching