User:Danyan Tang/Notebook/Biology 210 at AU
Lab 1. Biological life at AU Jan 15 2015 Purpose: 1.Observe 3 types of green algae using microscope and depression slides and understand how natural selection leads the evolution. 2. To observe and analyze a assigned transect at the AU campus.We will use the biotic and abiotic as samples to examine through the serval weeks for this semester and discuss the relationships between species in ecosystem.
Material and methods:1.(for the first part of lab) observe 3 types of green algae under the microscope which were chlamydomonas, gonium and volvox. Analyze them and fill out the information on the notebook. 2.(for the second part of lab) The TA gave each one a number to form a group of three assigned to each transect. our group went to the transect to take the sample with a 50mL conical tube.Back to the lab, we weighed out 11.22g of soil sample transferred them to a jar and added 500ml Deerpark water and 0.14g dried milk powder to make Hay infusion culture. Mix the jar for 10 second and placed them without lid for next week.
Data and observation:1.examine 3 green algae group,chlorophyta--the volvocine line. (#1)2. The 20 by 20 meter assigned transect was located on the North side of campus on the side where Hughes Hall and McDowell Hall are adjacent to each other.(#2) There are some abiotic and biotic components. abiotic:rocks, sunlight, shade from building,bench, soil and snow. biotic: tree, moss bushes and berries. (#3-#7)
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photo by Corina C.Velazco - 3.
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Conclusions and Future Directions: There are some condition can affect the transect, like the components, weather and so on. By using the Hay infusion culture, we can observe protists and study different species of bacteria. This can help us to understand how natural selection leads the evolution of different species.
