Self Reflection
Today, I learn about the indicator species in ecosystem. The indicator species is the species that can be the parameter of the environmental condition. The indicator species can signal a change in the biological condition of a particular ecosystem, and thus may be used as a proxy to diagnose the health of an ecosystem. For example, plants or lichens sensitive to heavy metals or acids in precipitation may be indicators of air pollution. Indicator species can also reflect a unique set of environmental qualities or characteristics found in a specific place.
I also learn about the condition and resources in ecosystem. Condition is Physicochemical features of the environment that may be altered by the activities of living organisms, but not consumed.  The example of conditions are temperature, relative humidity, pH, salinity, current velocity, soil structure and pollutant concentration. While resource is quantities of something that can reduced by the activities of a living organism during its growth and development. The example of resources  are solar radiation, inorganic materials - CO2, water, oxygen, mineral nutrients (macro-, micronutrients), food, and space.
The subject that I learned today was exciting so I like to study again about the kind of the relation about the condition and the resource of some organism.

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