Diversity of Organism

A. Diversity of Organism in an Ecosystem

Diversity of organism is observe due to the differences

A great number of organisms live on earth. Life exists everywhere, in the air, land, in soil, and on the ground. Name organisms around your house. You will find many kinds of organism there. People, cat, dogs, hens, banaa trees are some example. Diversity of organism exists because there are some differences among species, such, as the size, structure, form, color, and function. Based on your observation it is clear that your classmates also vary. The diversity exists because there are varieties among species and among individuals within a species. For instance, the structure from of dog is different from the structure of cat. The colour of cats fur are different from one another. A variety is the appearance of a particular characteristic that make one organism different from the other within the same species. There are even organ differences within an individual.

The Importance of  Diversity for Organism Preservation

Diversity of organism are also found among the member of a particular species. Diversity is very important for organism preservation. Animal or plants having more varieties will be more everlasting and they will survive more in the environment. On the other hand, animals and plant having fewer varieties will be less everlasting. Let us pay a close attention to the following example. Two populations live in a particular habitat. Population A have 10 species while population B has only 4 species. During their interaction with their environment, it is found out that there are only 5 varieties of population A successful. At the same time only 1 variety of population B is successful.

Human Activities that Can Affect the Variety of Organisms

The variety of each group of organism is not stable and always change. there are organism whose varieties increase, decrease or even remain the same. The degradation of variety can happen naturally or due to human interference. Human interference has great contribution in reducing the varieties of organism nowadays. Human activities may threaten the variety of organism. Deforestation for crop, farms, factory, road construction, housing, and overuse of pesticides, insecticides, and fungicides are examples of human activities that can threaten varieties of or organism.

Human Effort to Preserve Varieties of Organism

The varieties of organism benefit people economically, socially, or even cultural. Therefore, we should preserve the existence of varieties. The following are some ways to preserve varieties of organism.

B .The Influence or Population Density on the Environment

The number of human population keeps on increasing year after  year. No one knows exactly how many people live on earth and when the population growth will stop. The human population rapidly grows after several hundred years. More population needs more things to be provided.

Counting the Average of Population Change per Year

The population change rate (CR) per year can be shown by percentage. This rate is obtained by counting birth rate (BR) and death rate (DR). The formula of CR is

CR = (BR-DR/1000) x 100

Human Population Growth in Indonesia

According to the population cencus in 2000 there are 203.5 million people living in Indonesia. It became 206.1 million people in 2001. The average of population growth is approximately 2.3% per year. If this growth remains, the Indonesia population will be doubled in 20 years, so it would be 300 million people in 2010. If the growth is continuing it will lead to population explosion. This is surely not expected. Therefore, the family planning programme has to be encouraged to slow down the population growth.

Problem Arising From Population Density

The population density will lead to some problem in living since people will do anything to support their living.

C. Natural Resources as Environmental Attraction

Natural resources are raw materials from the environment which are used by organism including human for their continuity of life.

Renewable Resources are the Natural Resources that Can Be Reproduced

Natural resources that are renewable resources:  wood to build houses is from forest, water in your kitchen might come from a wellspring in a remote place.

Non Renewable Resource

These substances are nonrenewable resources. Nonrenewable resources are resources that cannot be reproduced by natural processes. Metal such as aluminum, iron, silver, uranium, gold, and petroleum are nonrenewable resources. Some minerals like phosphor need 500 or 1000 year to be provided in a soil layer of 2.5 cm deep. These kinds of minerals are considered as nonrenewable. Hence, substances that take a long time to be renewed in natural condition are considered as nonrenewable resources. Show petroleum mining as one of the non renewable resources.

The Supply of Natural Resources

The supply of natural resources in the earth is not always in big amount and abundant. Many of those resources have limited supply. Therefore, we need to be wise and thrifty when we use these resources. Some limited natural resources are petroleum, minerals, and other mining products. In addition to limited supply, the distribution of the resources in the earth is not even. Some countries are rich in petroleum and mineral supply, but others are very poor. Countries that have much supply of petroleum are known as petroleum exporters (APEC).

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