Question

1. explain in detail Caughly’s research on kangaroos

2. IN DETAIL what are the definitions of fundamental and realized niche. using examples: (especially the barnacles and tiger beetles)

3. IN DETAIL what are the Rabinowitz’s classifications for rarity (i.e., Rarity I, Rarity II, etc.).

Answer 1

.So, here is the answers to your question.

QUESTION 1

Caughley's research on kangaroos

So Caughley made many contributions to the research of kangaroo species in Australis.

He conducted studies based on the dispersion, the kind of activity, density of population, and their organization socially. His studies were made on the two species of kangaroos that is their behavior and in order to understand their habitat he took the help of the fecal pellets. All the research that he made was very much useful for further studies to understand the kangaroo's behavior, the kind of association they build with their fellow mates, and also their dispersal in their habitat. Based on these observations he found that each kangaroo's activity was determined by the several factors that are external which included season, forage, weather, etc, and even the internal factor like the reproductive status. The selection of their habitat was decided by the individuals on the basis of the food availability and the land area. Population density is impacted largely by the size of the group and the structure of the habitat

QUESTION 2

FUNDAMENTAL NICHE

The fundamental niche is basically the complete set of environmental conditions in which a living population of a particular species survives and utilizes the resources without the concern of any limitation that would restrict the population

This fundamental niche is capable to get occupied and also can be affected by the traits of ancestors of a particular species and it is also impacted by each individual - the ability to get dispersed and their potential to withstand the various environmental conditions and also their interaction with the species.

EXAMPLE:

So in the question, it has been mentioned to use the example of a barnacle

The Chthalamus barnacle is capable to occupy the complete shore of rock when living alone or in isolation

REALIZED NICHE

Next is the Realized niche which is also referred to as the actual niche in which an individual is comparably less efficient or capable to use the resources because of the presence of individuals of other species which compete for the resources which result in the intraspecific competition, withstanding environmental conditions which prevent the use of resources

EXAMPLE

In an area of shores of rock, the Chthalamus barnacle occupies only in the places of Semibalanus barnacle is not present

QUESTION 3

So the Deborah Rabinowitz conducted several research studies to study the biodiversity patterns. She described that there are seven different forms that are rare in which a common pattern of the abundance of species.

There is Rarity in a few of the studies which depicts how can a species be rare and be able to get dispersed widely in low density of population

She along with her colleagues studies the pattern in which a species is distributed and the presence of species in more concentration of a particular species.

I hope this helps. Please do let me know if I can help you with anything.

BEST OF LUCK

Thank you