Lake Ecosystems, Freshwater Ecosystems Flat (Not Flowing)
The lake is a vast and
silent body of water. Based on the penetration of incoming light, the ecosystem
of the lake is divided into 2 regions, namely the light-penetrated areas of
photon that photosynthesis can occur, as well as afloat areas that can not be
penetrated by light.
Lake Ecosystem
In the lake ecosystem
there is a drastic temperature difference in each depth. The area on the
surface will have a different temperature (warmer) than the area at the base.
Well, the dividing region between these two temperatures is known as
thermoclirt region. As for these differences, the plant and animal communities
that exist in the lake will vary according to the depth and distance from the
edge. Because of that, the ecosystem of the lake is divided into 4 regions
namely litoral areas, limnetic areas, profundal areas, and benthic areas.
a) The littoral region
Freshwater Ecosystems
The littoral region is
the shallow water area of the shallow ecosystem of the lake so that sunlight
can enter and penetrate it optimally. The plants in this area are identical
consisting of aquatic plants rooted with leaves sticking out onto the surface
of the lake. Various types of inherent algae, snails and mussels, crustaceans,
fish, insects, amphibians, water reptiles, and semi-aquatic reptiles such as
turtles, ducks, geese, snakes and mammals that often feed for are some of the
animalia that normally inhabit littoral regions this.
b) The limnetic region
The area of limnetics
is a region far from the edge of the lake ecosystem but still can be penetrated
by sunlight. The limnetic region is inhabited by various phytoplankton, algae,
and cyanobacteria. Algae and phytoplankton photosynthesize and multiply at high
speed in summer and spring. They are devoured by zooplankton and small
crustaceans. Zooplankton and small shrimp preyed on small fish Small fish
preyed by large fish, then large fish preyed by snakes, turtles, and fish
eaters.
Lake Ecosystem
The littoral region,
the limnetic region, the profundal region, and the benthic region
c) Profundal area
Profundal area is a
deep water area of lake ecosystem and can not be penetrated by sunlight. This
area is inhabited by microbes and worms. They use oxygen in the water to
interact through cellular respiration decomposing the detritus carried from the
limnetic region.
d) Benthic areas
The benthic region is
the base area of the lake ecosystem where benthos and decomposing dead
organisms.
Besides categorized
based on the ability of the penetration of sunlight, the lake ecosystem is also
grouped based on the production of organic matter. In this case, there are 2
types of lakes ie oligotrophic lake and eutrophic lake. What is the
oligotrophic lake and the eutrophic lake?
a) The oligotrophic lake
The oligotrophic lake
is an inner lake that is lacking food because phytoplankton in its limnetic
region is unproductive. The characteristics of this lake include clear water,
inhabited by a few living creatures, and at the bottom of the lake there is
plenty of oxygen throughout the year.
Lake Ecosystem
Oligotrophic lake
b) Lake eutrophic
Lake eutrophic is a
shallow lake rich in food content because phytoplankton in the limnetic region
is very productive. The characteristics of this lake is the water is turbid,
there are a variety of organisms, and oxygen is found only in the profundal
region.
Well, that's the
information about the classification of lake ecosystems. The lake ecosystem is
one of the freshwater ecosystems that have a tapering condition because the
water does not multiply
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