ECOLOGY
ECOLOGICAL SUCCESSION
|
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
|
|
|
Volcanic eruption
|
|
|
Forest fire
|
|
|
Nuclear waste spill
|
|
|
Large extraterrestrial object crashing on the earth
|
Detailed explanation-1: -Which of the following are least likely to be present during primary succession? Explanation: Primary succession begins with no soil.
Detailed explanation-2: -Primary succession occurs after a volcanic eruption or earthquake; it involves the breakdown of rocks by lichens to create new, nutrient-rich soils. The first species to colonize an area after a major disturbance are called pioneer species; they help to form the new environment.
Detailed explanation-3: -Places where primary succession occurs include newly exposed rock areas, sand dunes, and lava flows. Simple species that can tolerate the often-harsh environment become established first. These organisms help enrich the soil, allowing other species to become established.