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WorksheetsFreshwater Ecosystems
Total questions: 15
Worksheet time: 8mins
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
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
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
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
Land that was drained, filled and converted into farmland is an environmental concern for....
rivers
lakes
wetlands
all freshwater ecosystems
Eutrophication, an increase of nutrients from runoff, sewage and fertilizers are an environmental concern especially for ....
rivers
lakes
wetlands
all freshwater ecosystems
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
The amount of sunlight that can reach the bottom of the water is controlled by __
depth of water
flow of water
salinity
precipitation
The main difference between a pond and a creek is caused by __
depth of water
flow of water
salinity
precipitation
Water with a salinity between 0.5 ppt and 30 ppt is called
freshwater
marine (ocean) water
brackish
icky
The zone of a lake closest to shore is called the___
littoral zone
limnetic zone
netric zone
benthic zone
The zone of a lake where the water is too deep for rooted plants but there are phytoplankton and fish in the open water.
littoral zone
limnetic zone
netric zone
benthic zone
