Question

1. wetland ecosystem

text to speech
figure twelve shows a stable ecosystem. plant species cover nearly all of the land. animal life live among the plants and in the river
figure 1. wetland ecosystem
3 how would the ecosystem shown in figure 1 react to changing conditions?
select the correct answer for each statement

	little or no change	minor change	transformation into a new ecosystem
unusually high snow melt upstream causes the river to overflow its banks	○	○	○
an invasive fungus kills 90% of all plant species on the river	○	○	○

Explanation:

To solve this, we analyze each scenario based on ecosystem resilience and change:

1. Higher temperatures and 90% water reduction:

A 90% water reduction is a severe disturbance. Wetland ecosystems depend heavily on water. Such a drastic water loss would likely transform the wetland (e.g., into a dryland ecosystem) as key species (plants/animals adapted to wet conditions) would struggle to survive. So, Transformation into a New Ecosystem.

2. Unusually high snowmelt (river overflows):

Temporary flooding from snowmelt is a short - term, moderate disturbance. The ecosystem has resilience; plants/animals may be stressed but can recover as the flood recedes (e.g., seeds survive, animals relocate temporarily). Thus, Minor Change.

3. Fungus kills 90% of host species:

Killing 90% of host species (likely key plant species in the wetland) is a catastrophic disturbance. The foundation of the ecosystem (plant community) is devastated, so the ecosystem will transform (e.g., new species adapted to the altered environment will dominate). So, Transformation into a New Ecosystem.

Answer:

s (matching each statement to the column):

• “Higher temperatures and increased use by humans reduce the amount of water in the river by 90%”: Transformation into a New Ecosystem
• “Unusually high snow melt upstream causes the river to overflow its banks”: Minor Change
• “An invasive fungus kills 90% of all host species in the river”: Transformation into a New Ecosystem