ECOLOGY
ECOLOGICAL SUCCESSION
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
They are completely heterotrophic.
|
|
|
They do not appear until animals arrive.
|
|
|
They modify their environment.
|
|
|
They only exist in tropical biomes
|
Detailed explanation-1: -Which of the statement best describes a pioneer population found in beginning of ecological succession? They modify their environment. Starting on barren rock, what is the usual ecological succession of organisms?
Detailed explanation-2: -The first organisms appearing in the regions of primary succession are pioneer species (usually lichens or mosses). They are the first species present. They must be strong and hardy.
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: -The first stage of succession involves pioneer species. In primary succession, pioneer plants are those that can grow without soil, such as lichens. Lichens begin breaking down a rock. Seasonal cycles of freezing and thawing form cracks in the rock.