of Mount St. Helens Mount St. Helens is an active volcano located in the Cascade
ID: 268048 • Letter: O
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of Mount St. Helens Mount St. Helens is an active volcano located in the Cascade Range in southern Washington, USA. In the morning of May 18 in 1980, the volcano experienced an earthquake which triggered a massive eruption. The eruption was the deadliest and most destructive volcanic event in the history of the USA with magma and debris from the volcano covering vegetation, roads and building within an area of over 600km2 For ecologists, St. Helens presented a unique opportunity to study animal and plant re-colonization of areas affected by the eruption. To expand their understanding of how the presence of lupine affects the growth of other species, ecologists working at Mount St. Helens set up experimental plots where the growth of a fireweed seedling was measured when grown:Explanation / Answer
answer) from the above graph we can see that the fireweed seedling when grown together ,the growth decresase as compared to alone or single plant growth and when the growth is combined with lupine. so from here we can infer that alone firewwed seedling can grow much better rather than growing together with same palnt that is fireweed and with other plant that is lupine so the answer of the above question is A that is competition between fireweedseedlings is stringer than than of lupine and fireweed seedling.
1F= MORE GROWTH.
2F= MORE COMPETITION RETARTED GROWTH.
1F+1L= LESS COMPETITION REDUCED GROWTH SOMEWHAT.
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