Download 3 Communities, Biomes, and Ecosystems 3 Aquatic Ecosystems

3 Communities, Biomes, and Ecosystems
3 Aquatic Ecosystems
12(A), 12(B), 12(F)
MAINIDEA
Write the Main Idea for this lesson.
REVIEW VOCABULARY
Recall the definition of the Review Vocabulary term.
salinity
salinity
NEW VOCABULARY
Write the correct term in the left column for each definition below.
deepest areas of a large lake
narrow band where the ocean meets land
area of the open ocean that is too deep for sunlight to penetrate
area of the open ocean to a depth of about 200 m that is shallow enough
for sunlight to penetrate
deepest region of the ocean
area of a lake or pond that is closest to shore
ecosystem that is formed where a freshwater river or stream
merges with the ocean
open water area of a lake or pond that is well lit and dominated by
plankton
area of sand, silt, and dead organisms along the ocean floor
material that is deposited by water, wind, or glaciers
free-floating photosynthetic autotrophs that live in freshwater or marine
ecosystems
Science Notebook • Communities, Biomes, and Ecosystems
36
Copyright © McGraw-Hill Education. Permission is granted to reproduce for classroom use.
areas of land such as marshes, swamps, and bogs that are saturated with
water and that support aquatic plants
3 Aquatic Ecosystems (continued)
Student Edition, pp. 74–81
Complete this paragraph about the distribution of water on the Earth.
Reading Essentials,
pp. 30–34
By far,
is the most common type of water on
Earth. Of the 2.5 percent of
on Earth, most is
locked in the ice of
live in
. Most freshwater species
,
,
,
that make up only
, and
percent of all
freshwater. The remaining freshwater is found in
GET IT?
.
Describe key abiotic factors that define rivers and streams.
Analyze how the speed of water flow affects life in a river by
writing more or less in the appropriate boxes in the figure.
Accumulation of
sediment and
organic material
Species that can live
in these waters
Copyright © McGraw-Hill Education. Permission is granted to reproduce for classroom use.
Fast-moving
water
Slow-moving
water
Compare the zones of lakes and ponds by completing the table below.
Zone
Location
Example Species
well-lit open water
area
limited due to cold and reduced
light and oxygen
littoral
Science Notebook • Communities, Biomes, and Ecosystems
37
3 Aquatic Ecosystems (continued)
Compare transitional aquatic ecosystems. Identify two types in the
organizer below and describe the environments each type combines.
Transitional Aquatic
Ecosystems
combine:
combine:
Identify the marine ecosystems. Write the name of the zone in each box
in the figure below.
shore
200 m
extreme depth
GET IT?
Describe environmental variation in intertidal zones.
Science Notebook • Communities, Biomes, and Ecosystems
38
Copyright © McGraw-Hill Education. Permission is granted to reproduce for classroom use.
ocean floor
3 Aquatic Ecosystems (continued)
REVIEW IT !
1. MAINIDEA List the abiotic factors that are used to classify aquatic ecosystems.
2. Apply what you know about ponds. Do you think the same organisms that would live in
a seasonal pond would live in a pond that existed year-round? Explain.
3. Describe an ecological function of an estuary.
Copyright © McGraw-Hill Education. Permission is granted to reproduce for classroom use.
4. Describe the zones of the open ocean.
5. Infer how autotrophs in the abyssal zone of the ocean are different from those of the
photic zone.
6. In November 2004, the floodgates of Glen Canyon Dam opened in an attempt to
improve the Colorado River habitat. The release topped 1161 m3/s—four times the usual
daytime flow. Based on this information, about how much water normally flows through
the dam on a daily basis?
Science Notebook • Communities, Biomes, and Ecosystems
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