AP BIOLOGY

ECOLOGY

ECOLOGICAL SUCCESSION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
What happens to the pioneer organisms once the new colonizers become established?
A
they continue to grow and thrive in the environment
B
they are still there but they do not grow as fast
C
they die off because of lack of sunlight and decay adding nutrients back to the soil.
Explanation: 

Detailed explanation-1: -What happens to the pioneer organisms once the new colonizers become established? Read This! As the newer colonizers begin to take over, animals will also begin to appear so they can feed on the more diverse food source. The pioneer plants die and decompose and the animals leave behind manure.

Detailed explanation-2: -Pioneer species will eventually die, create plant litter, and break down as “leaf mold” after some time, making new soil for secondary succession (see below), and releasing nutrients for small fish and aquatic plants in adjacent bodies of water.

Detailed explanation-3: -During primary succession on land, fungi and lichen are the most common pioneer species. They break down minerals in the rock to form soil, which allow subsequent communities to colonize the area.

Detailed explanation-4: -Pioneer species help in ecological succession by preparing an environment for later species. In primary succession, pioneer species move into barren, rocky landscapes that cannot support other living species. They help to break down rocks into soil and then enrich the soil with decaying organic matter when they die.

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