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Biology form 4  eutrophication(Malaysia)

Biology form 4 eutrophication(Malaysia)






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    Biology form 4  eutrophication(Malaysia) Biology form 4 eutrophication(Malaysia) Presentation Transcript

    •  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.
    •  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
    •  The "bloom" or great increase of phytoplankton in a water body as a response to increased levels of nutrients.
    • Sources of cultural Eutrophication
    •  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.
    • The algae overgrowth
    • Normal lake and lake during eutrophication.
    • 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.
    • The lake during eutrophication
    • 1. Zon Avicennia dan Sonneratia 2. Zon Rhizophora 3. Zon Bruguiera
    • 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.
    • 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.
    • 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.