3. The fertilizer spread on the land.
The fertilizer is washed down by the rain
and absorbed by the soil.
The fertilizer is transported to a lake by
underground water.
The presence of the fertilizer in the lake
causes overgrowth the algae and
aquatic plants.
4. Now, no sunlight can reach the lower
part of the lake causing algae to die.
The bacteria composes the algae. By
doing this the bacteria used up all the
oxygen making it anoxic.
Because, all of this , all the organism in
the lake die
5. The "bloom" or great increase of
phytoplankton in a water body as
a response to increased levels of
nutrients.
7. Species diversity decreases and the
dominant biota changes.
Plants and animals biomass increased.
Turbidity increases .
Rate of sedimentation
increases, shortening the lifespan of the
lake.
Anoxic condition may develop.
10. NORMAL LAKE LAKE DURING
EUTROPHICATION
Low nutrients level
Good light
penetration
High dissolved
oxygen
Deep water
Low algal growth
Smell mouth bass,
lake trout, pike,
sturgeon, whitefish.
• High nutrients levels
• Poor light
penetration
• Low dissolved
oxygen
• Shallows water
• High algal growth
• Carp, bullhead,
catfish.
14. 1. Tanah yang lembut dan berlumpur
serta angin laut yang kuat.
2. Terdedah kepada keamatan cahaya
yang tinggi.
3. Keadaan tanah yag bertakung air.
4. Kemasinan air laut yang tinggi.
5. Biji benih yang jatuh ke tanah mati.
15. ASPEK Zon 1 Zon 2 Zon 3
Jenis
akar dan
ciri-ciri
penyesua
ian.
Akar
ceracak
dan
bercabang
luas.
Sistem
akar yang
meluas.
Beratus-
ratus akar
pneumatofo
r.
• Akar
jangkang.
• Akar banir.
16. ASPEK Zon 1, Zon 2 dan Zon 3
Daun
Hidatod
Vivipariti
Kutikel tebal
Sukulen dan boleh menyerap air.
Liang pada epidermis daun.
Biji benih yang bercambah sementara
masih lagi melekat pada tumbuhan
induk.