Freshwater Ecosystem Review

Which of the following would describe plants living in lotic ecosystems?

• Long, thin, flexible stems that offer little resistance to the current and strong root systems to hold them in place

• Are tiny, free-floating species of algae, and are the food base of the ecosystem

• Are tall because they have greater support, enabling them to rise above other plants to reach the sun

• none of these

Match the following

• benthos

• organisms drifting or free floating in aquatic biomes that require currents to move

  
  

• plankton

• organisms living on, near, or in the sediment of lakes

• nekton

• microscopic organisms that swim freely, independent of currents

Tags

NGSS.MS-LS2-2

All of the following are considered to be a freshwater ecosystems except:

• aquifers

• salt marshes

• streams

• rivers

Which of the following abiotic factors determine where organisms live in a freshwater lake?  Select ALL that apply.

• oxygen

• nutrients

• salinity

• carbon dioxide

Tags

NGSS.MS-LS1-5

Which of the following can be classified as a lentic ecosystem?  Select all that apply.

• Lake Michigan

• Cypress Creek

• Mississippi River

• Atchafalaya Basin Swamp

Match the following

• headwaters

• lower-elevation streams; water becomes warmer, slower; oxygen decreases; supports organisms similar to those in lakes and ponds

• transition zone

• usually cold and full of oxygen; shallow high velocity water; little to no rooted or floating plants

• floodplain zone

• lowest elevation; broad nearly, flat valley; river's mouth opens up to the sea; fairly shallow with increased productivity/food; lower oxygen level

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-4

NGSS.MS-LS2-1

An area of land covered with freshwater for at least part of the year; occurs in areas where the water table is at or near the surface

• wetland

• river

• lake

• bayou

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-4

What is hydric soil?

• soil found in wetlands that decompose organic material

• soil found in wetlands that provide nutrients for aquatic life

• soil found in wetlands that is consistently producing enough oxygen for aquatic life

• soil found in wetlands that remains wet long enough to create oxygen-poor conditions

Tags

NGSS.MS-LS2-3

Because of hydric soil, plants in wetlands must be _____ to adapt to growing in wet soil with little oxygen.

• hydrothermal

• hydrophylic

• hydrologic

• hydrophobic

Which of the following is a type of freshwater wetland?

• bog

• lake

• pond

• estuary