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Massachusetts Comprehensive Assessment System



MCAS QUESTION OF THE DAY:

line
GRADE High School
Download PDF Document 2015 Module Introduction
Kilauea is a Hawaiian volcano that erupted in 1959, destroying vegetation and animal life over an area of 5 million square meters.
 
Before the eruption, many organisms lived on the volcano in a rain forest community. The rain forest was dominated by ohia trees and two species of tree ferns. Small trees, tall shrubs, and herbaceous plants (plants lacking woody tissues) were also present.
 
After the eruption, scientists closely monitored the area to track the recolonization of the devastated habitat. Scientists did not find any organisms living in this area for the first six months following the eruption. The table below shows the changes in one localized area that was covered by a massive amount of lava rock with many cracks and crevices. Despite the colonization of the area by several different types of organisms by year 9, the overall cover of the habitat was so low that the surface still looked barren.
 
Type of
Organism
Percent of
Community*
6 Months
after
Eruption
Percent of
Community*
1 Year
after
Eruption
Percent of
Community*
3 Years
after
Eruption
Percent of
Community*
7 Years
after
Eruption
Percent of
Community*
9 Years
after
Eruption
 algae025402217
 mosses050301717
 ferns025201717
 lichens0  010  9  6
 seed plants0  0  03543
*Percent by number of species

2015 Spring Release, Biology - High School
Download PDF Document Question 9 - Multiple-Choice

Reporting Category: Ecology
Standard: 6.3 - Use a food web to identify and distinguish producers, consumers, and decomposers, and explain the transfer of energy through trophic levels. Describe how relationships among organisms (predation, parasitism, competition, commensalism, mutualism) add to the complexity of biological communities.

 
The recolonization of this area by algae, mosses, ferns, and seed plants reestablished which trophic level in the devastated ecosystem?
 
 
 

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Last Updated: March 23, 2017
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