The following graph shows the species - area relationship. Answer the

1.	The following graph shows the species - area relationship. Answer the following question as directed.(a) Name the naturalist who studied the kind of relationship shown in the graph. Write the observation made by him. (b) Write the situations as discovered by the ecologists when the value of 'Z' (slope of the line) lies(i) 0.1 and 0.2 (ii) 0.6 and 1.2 What does 'Z' stand for ? (c) When would the slope of the line 'b' become steeper ?
Answer» (a) Alexander Von Humboldt. Within a region species richness increased with increasing explored area but only up to a limit. (b) (i) The slope:: of regression lines are similar / unaffected distribution in an area / normal range. (ii) The slope of regression is steeper when we analyse the species area relationship among very large areas like entire continent. Z (slope of the line) regression co-efficient. (c) If species richness is more /0.62 - 1.2. Detailed Answer: (a) Alexander von Humboldt: Observation : The species richness discovered was directly proportional to the area explored but only upto a certain limit. (b) (i) The general care - when a limited area is explored and species richness noted. (ii) The case when large areas like entire continents are taken and the relation between area and species richness studied. Z → Regression coefficient (slope of line). (c) The slops is steeper when the value of regression coefficient, z, is higher that is, increased species diversity in a given area and when large, geographical areas or continents are considered.

The following graph shows the species - area relationship. Answer the following question as directed.(a) Name the naturalist who studied the kind of relationship shown in the graph. Write the observation made by him. (b) Write the situations as discovered by the ecologists when the value of 'Z' (slope of the line) lies(i) 0.1 and 0.2 (ii) 0.6 and 1.2 What does 'Z' stand for ? (c) When would the slope of the line 'b' become steeper ?

Answer»

(a) Alexander Von Humboldt. Within a region species richness increased with increasing explored area but only up to a limit.

(b) (i) The slope:: of regression lines are similar / unaffected distribution in an area / normal range.

(ii) The slope of regression is steeper when we analyse the species area relationship among very large areas like entire continent. Z (slope of the line) regression co-efficient.

Detailed Answer:

(a) Alexander von Humboldt:

Observation : The species richness discovered was directly proportional to the area explored but only upto a certain limit.

(b) (i) The general care - when a limited area is explored and species richness noted.

(ii) The case when large areas like entire continents are taken and the relation between area and species richness studied.

Z → Regression coefficient (slope of line).

(c) The slops is steeper when the value of regression coefficient, z, is higher that is, increased species diversity in a given area and when large, geographical areas or continents are considered.

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