Q1.1. Ecological succession refers to: Fairly predictable changes in species com

Question

Q1.1. Ecological succession refers to: Fairly predictable changes in species composition over time in a particular location Changes in species composition over millions of years on a continent. Changes in species composition across an environmental gradient, such as from higher to lower altitudes. Changes in species composition as a large-scale environmental factor such as temperature changes. 1.2. Which of the following is NOT an example of ecological disturbance? A volcanic eruption that covers acres of forest with ash Differences in rainfall between the west and east sides of a mountain range Clearing brush (small woody plants) from a field The surging waters of snowmelt from the Alps every spring Q1.3. Intermediate levels of disturbance often lead to higher diversity because: Some species are not vulnerable to the disturbance and reach larger population sizes. Frequent disturbance can bring new species to an area that were not there before. It is easier for many species to resist disturbances if they occur not too rarely nor too frequently. Both species that do well at low disturbance and those that do well at high disturbance are usually present.

Explanation / Answer

The answers for the questions are follows:

Question no 1.1 answer is (D) [reason: Ecological sucession reffers to a series of progressive changes in the composition of an ecological community composition over time, may be decades, centuries or an abrupt change due to natural or manmade calamaties or incidents, whis may or maynot be restored fully or partially to its original conditions]

Question no 1.2 answer is (B) [reason: It is a sesonal condition establishing a condition for ecological development not a cause for sucession]

Question no 1.3 answer is (D) [ reason: Some of the species may be affected, some may be affected, some are partially affected and recovers from the event and these contribute to the the diversity of the species composition]

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