freshwater biomes

Question 1

large communities of plants and animals centered on waters with less than 1% salt concentration

Answer 1

freshwater biomes

Question 2

it is formed when water begins to fill in a depression in the ground

Answer 2

ponds

Question 3

formed due to the action of glaciers and ice sheets

Answer 3

lakes

Question 4

shallow. sunlight can reach the bottom and it has uniform temperature

Answer 4

ponds

Question 5

deep. sunlight doesnt reach the bottom part. temperature is not uniform

Answer 5

lake

Question 6

classification of lakes

Answer 6

oligotrophic lake
mesotrophic lake
eutrophic lake

Question 7

lakes with less nutrient content and clean water. it has low concentration of nitrogen and phosphorus and the biological oxygen demand is low but has high penetration of sunlight. waters often very clear

Answer 7

oligotrophic lake

Question 8

moderate nutrients added to the water. increased productibity: high sediment accumulation and decaying matter

Answer 8

mesotrophic lake

Question 9

rich in nutrients and so supporting a dense plant population, the decomposition of which kills animal life by depriving it of oxygen

Answer 9

eutrophic lake

Question 10

unwanted explosion of living aquatic-basedd organisms in lakes and estuaries that results in oxygen depletion that can destroy an aquatic ecosystem

Answer 10

eutrophication

Question 11

most important environmental problem caused by phosphorus losses

Answer 11

eutrophication

Question 12

increased load of nutrients to estuaries and coastal waters

Answer 12

eutrophication

Question 13

slows the growth of fish and shellfish and can prevent shell formation in bivalve mollusks. This leads to a reduced catch for commercial and recreational fisheries, meaning smaller harvests and more expensive seafood.

Answer 13

acidification

Question 14

3 zones of lake

Answer 14

limnetic zone
littoral zone
profundal
benthic zone

Question 15

division of lake into zones is called

Answer 15

lake zonation

Question 16

shallow-water zone wherein light reaches the bottom. stimulates the growth of rooted plants on the area near the shor at the top of the lake that receives sunlight

Answer 16

littoral zone / nearshore

Question 17

sunlight part at the top of the lake similar to the littoral zone. it is the open area away from the shore adn most photosynthesis occurs in this part of the lake

Answer 17

limnetic zone / the open water

Question 18

deep open water where it is too dark for photosynthesis which results in low levels of dissolved oxygen

Answer 18

profundal zone / the deep water

Question 19

very bottom of the lake wherein organisms here tend to tolerate cooler temperatures well. place where decomposition takes place. low level of photosynthesi

Answer 19

benthic zone / the lake floor

Question 20

unique ecosystem, flooded by water. standing water that nourishes underwater plants. function as natural sponges that trap and slowly release surface water, rain, snowmelt, groundwater, and flood waters

Answer 20

wetland

Question 21

naturaly flowing watercourse that is usually cold and full of oxygen and runs swiftly

Answer 21

rivers

Question 22

natural flow of water that follows a more temporary path that is usually not in a valley

Answer 22

streams

Question 23

location of the original release water
act as reservoirs
may be defined as several disctinct zone or layers. it has lots of dissolved oxygen and not productive due to lack of nutrients and phytoplankton

Answer 23

source zone

Question 24

wider, lower-elevation streams. water is warmer with more nutrients, supports more producers and slightly dissolved oxygen.

Answer 24

transition zone

Question 25

warmer temperature and less dissolved oxygen. carries substantially more sediment.

Answer 25

floodplain zone

Question 26

percentage of freshwater

Answer 26

2.5%

Question 27

major freshwater biomes

Answer 27

ponds and lakes, streams, rivers, and wetlands