Happiness

Organisms at Same Habitat and Different Habitat Organisms choose to live in an environmentwhere they will find it easier to survive. Some organisms prefer to live as a group. For these reasons, many organisms of the same species can be found in the same place at the same time. Apopulation is defined as a group of organisms of the same kind, living, and reproducing at a given place and at the same time.. this include young and adult organisms living in the same place at a given time. Thus, the grasshopper population in the school’s eco-garden would include the total number of adult grasshopper and nymphs living in the garden of a given time. Different species of organisms also often live in the same place at any given time, because of suitable environmental conditions at that place. A community consists of many populations living together in a particular place. The different populations in a community interact and depend on one another. We say they are interdependent. An exam...

DIVERSITY INDICES: SHANNON'S H AND E   Introduction: A diversity index is a mathematical measure of species diversity in a community. Diversity indices provide more information about community composition than simply species richness (i.e., the number of species present); they also take the relative abundances of different species into account (for an illustration of this point, see below , or introduction to SIMPSON'S D AND E ).   Importance: Diversity indices provide important information about rarity and commonness of species in a community. The ability to quantify diversity in this way is an important tool for biologists trying to understand community structure. Question: How do we measure diversity? Variables: H Shannon 's diversity index S total number of species in the community (richness) p i proportion of S made up of the i th species E H equitability (evenn...

Simpson's Diversity Index Simpson's Diversity Index is a measure of diversity. In ecology, it is often used to quantify the biodiversity of a habitat. It takes into account the number of species present, as well as the abundance of each species. The Index of Diversity which AS/A2 level students in the UK need to understand can be found here . Before looking at Simpson's Diversity Index in more detail, it is important to understand the basic concepts outlined below. Biological Diversity - the great variety of life Biological diversity can be quantified in many different ways. The two main factors taken into account when measuring diversity are richness and evenness. Richness is a measure of the number of different kinds of organisms present in a particular area. For example, species richness is the number of different species present. However, diversity depends not only on richness, but also on evenness. Evenness compares...