RESUME 3 : Resources, Condition, and Indicator Organism

As the biological studies develop many scientifics question come to the surface. One of the most common question that comes to the ecologist’s mind is ‘what are the factors that determine the distibution and abundance of species ?’. So in this resume will be discussed the determining factors of distribution and abundace of species.  There are two mains factor, which are, tolerance of conditions, and the availibility of cerain resources. Conditions can be defined as every abiotic component influencing the organism, their surrounding, such as air, dilute O₂ in water, temprature, light and so on. While resources can be defined as something needed by the organism, such as nutrients, food, water, and even money.

For the example in studying the proper condition and resources for the distribution and abundace of species, let’s take a closer look on our small friend, tarsius. The existance of tarsius is a kind of interesting topic to e discussed nowadays. Tarsius mainly found in the Sumatra, Sulawesi, and Philipines. Experts suggest that tarsius only dwell in the dense forest, only in spesific forest which consist only high-three with many branches. Since tarsius belongs to noctrunal animal, they hunt on bugs, and other insects during the night falls. So on of  the condition that influence the abundat and the distribution of tarsius is the light while the resources are the forest density and the food availibility.

One of the most important fact that there will be always limiting the existance of such organism, called limiting factor. It can control population, decreasing or even extending the diversity. For example as we take a journey to the far Egypt, we can see the vast-hot-desperating dessert. There are only several population strives the condition. The extreme condition of dessert such the high temprature and the high intensity of sunlight become the limiting factor for some specieses. There only be several organism that can well-adapt survive cactus, and camel. Both have a specials form of adaptation in order to conserve water as they live.

And so the implication of limiting factors can be used for the indicator of certain condition. For example the pressence of some bacteria or other organism can reflect the certain resources due to their environmental. Certain bacteria can be used as indicator organisms in particular situation. The presence of bacteria in human feces, coliform bacteria, for example E coli, can be used for fecal contamintaion indicator.