Week 7

Assalamualaikum !!! we meet again in week 7.

For this week we continue our lecture on the Microorganism in the Terrestrial Ecosystem. There are 4 types of microbe plant interactions which is epiphytes( microbes that live on the surface of plants), endophytes(microbes that colonize internal plant tissues), some microbes live in the aboveground and also some microbes that inhibit below ground plant tissue.

The role of microbes in Rhizosphere and Rhizoplane(surface of root)

• labile source of nutrients, creating microbial loop
• synthesis and degradation of organic matter
• promote plant growth
• associate in nitrogen fixation

Microbial loop

Mycorrhizae

• a mutualistic plant-associations 
• there are two types of mychorrhizae association which is endomycorrhizae and ectomycorrhizae.
• important to plant

soil population - protozoa

3 general function of soil protozoa

1. Mineralizing nutrients
2. Regulating bacteria populations
3. Food source

Next, we study on the Hydrosphere. Before we go for a lecture on Thursday, we must do some exercise that has been provided by group 4. 

Here are the exercise that we do:

Explanation in thinglink. Very creative!!!

They even make a mind map for us. Thank you

Then, we do a crossword and its really challenging.

Hydrosphere also part of microbial habitat. Two types of microorganism can be found are autochthonous (indigenous) and allochthonous (foreign). The important physical factor in Hydrosphere is dissolved oxygen content, temperature, pH and also light penetration.

1. light - determine the rate of photosynthesis
2. temperature - determine by the latitude and weather condition, large body water will be more stable in temperature.
3. pressure - important in ocean, increases 1 atm with each 10 m in depth.
4. nutrient - varies in ocean 
5. dissolved gas - oxygen (for aerobic) & carbon dioxide (for photosynthetic process)

Here I include the video on how eutrophication can occur hope it useful.. ^_^

Salt marshes, its unlike the estuaries it lack of freshwater input from a single river. Salt marsh ecosystems can be modeled in Winogradsky columns.

Thats all from me..hehe