Freshwater Ecosystems

Freshwater flowing ecosystem

wider and deeper then headwaters

flow of water slower then headwater

more plants and animals but less than in standing systems.

• littoral zone of lake/pond

• open waters of lake/pond

• benthic zone of lake/pond

• downstream part of river

• marsh

Tags

NGSS.MS-LS2-1

Freshwater standing ecosystem

Less dissolved oxygen but more plant-life than in flowing systems.

Located near the shore. The water is shallow, warm with much plant life such as cattails, reeds, & waterlilies rooted in the nutrient rich mud.

• littoral zone of lake/pond

• open waters of lake/pond

• benthic zone of lake/pond

• downstream part of river

• marsh

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

NGSS.MS-LS2-4

Freshwater standing ecosystem

Located at the lake or pond bottom (floor).

Water is cool & deep with no plants or phytoplankton (no sun for photosynthesis) but decomposers such as bacteria, crabs & catfish

• littoral zone of lake/pond

• open waters of lake/pond

• benthic zone of lake/pond

• downstream part of river

• marsh

Tags

NGSS.MS-LS2-1

NGSS.MS-LS2-3

Which of the following is NOT a characteristics of headwaters of a river...

• originate from snow melts in the mountains

• more plant life found here than downstream

• more dissolved oxygen found here than downstream

• cold, shallow and moves swiftly

Which of the following is NOT a Benefit of a wetland.....

• absorb & remove pollutants from water to purify

• control flooding & erosion

• breeding ground for many animals & migrating birds

• breeding ground for disease causing insects

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-5

Land that was drained, filled and converted into farmland is an environmental concern for....

• rivers

• lakes

• wetlands

• all freshwater ecosystems

Tags

NGSS.MS-LS2-4

NGSS.MS-LS2-5

Eutrophication, an increase of nutrients from runoff, sewage and fertilizers are an environmental concern especially for ....

• rivers

• lakes

• wetlands

• all freshwater ecosystems

Tags

NGSS.MS-LS2-3

NGSS.MS-LS2-5

land covered by water part of the year are called ____.

If they have trees and shrubs they are called ____

• wetland and marsh

• littoral and benthic

• wetland and swamp

• marsh and swamp

Land covered by water part of the year are called ____.

If they have grass with NO trees they are called ____

• wetland and marsh

• littoral and benthic

• wetland and swamp

• marsh and swamp

The amount of salt found in the water is called __

• depth of water

• flow of water

• salinity

• precipitation