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Download File - Environmental Sciences
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Soha Nadeem Mr. Mangan IB1 Environmental Sciences 23 March 2016 1. Krataku was most famous for its eruption in 1883. 2. Anak Krakatoa is the only island formed, back in 1926. 3. There were hardly any humans left, and there were some insects stuck underground. 4. The type of succession, which occurred, was primary succession. 5. The pioneer species were pocket gophers, seeds, and parts of plants 6. These pioneers brought nutrients for the soil when they died. Gophers mixed essential fungi that allowed plant roots to absorb soil nutrients to grow and make energy for other organisms 7. Plants, such as ferns. They were able to establish themselves, since they are now in a climax community. 8. The new ones were able to arrive by air, sea and animals. 9. Already some surviving organisms in the rubble of the disaster. Didn’t have to wait on the transporting organisms getting there by chance. 10. It was possible as there are nutrients in the soil from the decayed animals and plants. Third: Sustaining where life in ecosystem begins to enter pattern that allows cycle of life to continue (birth and death occurring, little migration outside of the ecosystem) Fourth: Producing when lifeforms are breeding and growing. Also more areas of overgrowth or overpopulation 11. Smaller plants and trees (pioneer species) helped by adding nutrients to the soil which allows big trees to grow and survive in the ecosystem as there was enough nutrients in the soil to sustain them. 12. Through succession, more organisms came that where different that the pioneer species as the pioneer species made the ecosystem more habitable for a variety of species. With more nutrients in the soil, more plants could survive, attracting more insects and more animals to the ecosystem. Through the stages of succession (pioneer, establishing, sustaining, and producing), diversity was able to occur. 13. Tropical rainforest ecosystem 14. Overgrazing and pasture degradation, overfishing and replacement of commercially valuable fish, severe forest fires when forests are protected from fires. Plagioclimax community is an area or habitat where the influences of humans have prevented the ecosystem from developing further (stopped from reaching its full climatic climax or deflected towards a different climax by cutting down existing vegetation, burning for forest clearance, planting trees or crops, grazing and trampling by domesticated animals, or harvesting of planted crops).