Biology For Us

What Is An Indicator Species? An indicator species is an organism whose presence, absence or abundance reflects a specific environmental condition. Lichens, which are a combination of an alga and a fungus growing together, are indicators of air pollution, especially sulfur dioxide, a waste product of burning sulfur-containing fossil fuels. Leafy lichens tolerate some air pollution and crusty lichens can survive with higher levels of pollutants. If no lichens are present, it usually indicates heavy air pollution. Lichens Lichens are mutualistic association between a photosynthetic organism (algae or cyanobacterium) and a fungus. Fungi obtain food and O 2 resulted from photosynthetisis in algae, while algae can maintain its moisture because of fungi as well as obtaining CO 2 and minerals. Fungi composing lichens are usually from the groups of Ascomycota and Basidiomycota, while the symbiont are usually coming from Cyanobacteria and Chlorophyta (green algae). Lichens perfo...

Condition and Resources   Conditions is an abiotic environmental factor that varies in space and time and affects the performance of organism. Tigers are   susceptible to high temperatures and enjoy cooling down in refreshing water. . Resources is all things consumed (used up) by organisms (space, nutrients, water, prey, holes for refuge etc). Tigers can live in a wide range of habitats, and are commonly found in: Evergreen forests mangrove swamps Tropical rainforests savannahs Grasslands Rocky mountains Tigers are carnivores that prey on other animals such as zebras, antelope, deer, wild pigs, birds and other animals depending on what is available in their habitat. Like other organisms, tigers are also   need   water. Besides, tigers also need shelter from predators animals including the threat of poaching or habitat destruction by humans. Reference Meyer, Amelia.2013. Tigers: The Most Majestic Cat in The World, (Online) http: // h...

Journal Title: Effect of Land Use on Ground Water Quality (A Case Study from Ciracas Sub-District, East Jakarta, Indonesia). International Journal of Bioscience, Biochemistry and Bioinformatics, Vol. 3, No. 1, January 2013. Author: Lily Surayya Eka Putri, Nelly Kustanti, and Etyn Yunita, Member, IACSIT   The journal is investigating the groundwater quality in the area of Ciracas, Indonesia. The groundwater in the region contains organic and anorganoc pollutants. Air yellowish and smelled like iron. In addition, there Coliform and E. coli bacteria .There are 5 villages sampled for this study, which are Ciracas, Susukan, Kampung Rambutan, Kelapa Dua Wetan, and Cibubur Bekasi where at any location, there are fields, swamps, and gardens. Data obtained from 15 wells with 3 repetitions. Then the data is processed by ANOVA and Pearson's Correlation to determine the relationship between the distance of wells and septic tanks with a concentration Coliform and E. Coli. The ...