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Final FALL C Niche I Assignment Worksheet and Instructions 25 points General Biology II (Arizona State University) Scan to open on Studocu Studocu is not sponsored or endorsed by any college or university Final FALL C Niche I Assignment Worksheet and Instructions 25 points General Biology II (Arizona State University) Scan to open on Studocu Studocu is not sponsored or endorsed by any college or university Downloaded by M Pasel (mpasek655@gmail.com) lOMoARcPSD|29242783

Quantifying the Niche I Assignment Worksheet 25 points Name: Morgan Gifford You are required to submit an electronic copy of this completed worksheet to Canvas. The deadline for submission is posted with the link for submission. There are 11 research articles posted in the Modules → Quantifying the Niche I → Learning Materials and Lab Instructions area on Canvas. Your assignment for this week is to choose two of the 11 articles posted on Canvas and answer the following questions using the two articles you chose. You must also include the correct citation for each article after the questions (-25% grade deduction for each missing citation) . Article 1: 1. List the complete title of the article. (0.5 points) Thermal Acclimation of Heart Rates in Reptilian Embryos 2. List the author(s) of the article. (0.5 points) Wei-Guo Du, Hua Ye, Bo Zhao, Daniel A. Warner, Richard Shine 3. What is the question the research is trying to answer? What is the hypothesis being tested? What are the predictions being made? (3 points) The question being asked is, “Do the metabolic and developmental rates of embryos acclimate to local incubation regimes, as occurs for metabolic acclimation by post-hatching reptiles”? The hypothesis being tested is that reptilian embryos subjected to higher temperatures will exhibit increased heart rates and oxygen consumption compared to embryos kept at lower temperatures. The predictions being made are that the climate will have an effect on the embryos heart rate in a specific way depending on the temperature. 4. What is the basic experimental design (2.5 pts) ? List the responding variable(s) including units, and two controlled variables (1.5 pts) . What is the manipulated variable (0.5 pts) ? How many treatments were there (0.5 pts) ? What are the treatments (1.5 pts) ? (don’t just highlight the entire methods section or you will not receive credit for this portion) (6.5 points) Downloaded by M Pasel (mpasek655@gmail.com) lOMoARcPSD|29242783

-The basic experimental design is: they collected eggs from multiple reptile species, all eggs were weighed and incubated. The eggs were then exposed to different temperatures, while maintaining appropriate oxygen levels based on temperature. The heart rates and oxygen consumption were measured. -The responding variables were the heart rate and oxygen consumption V O2, the controlled variables were how each species' eggs were incubated as well as how long they spent in each given temperature. The manipulated variable was the temperature because when that was changed they also measured if there was a change in the O2 consumption. -The treatments were the different temperatures that each species' eggs were exposed to. They were: reptile C. serpentina was incubated at 25 degrees C and 30 degrees C, day 34 and 24 for S. undulatus at 25 degrees C and 28 degrees C; day 36, 22, and 15 for B. duperreyi incubated at 20 degrees C, 25 degrees C and 30 degrees C; day 50, 35, and 27 for E. taeniura incubated at 22 degrees C, 26 degrees C and 30 degrees C.. The eggs were transferred to an incubator set at 20, 25, or 30 degrees C for two hours prior to being placed individually on a Buddy infrared heart rate monitor placed inside the incubator to record heart rates 5. Were the hypotheses supported? Explain why or why not. (2 points) The hypothesis was supported because; both the embryonic heart rate (HR) and rate of O2 consumption increased with temperature over the range of 20–30 degrees C. Du, W. G., H. Ye, B. Zhao, D. A. Warner, and R. Shine. 2010. Thermal Acclimation of Heart Rates in Reptilian Embryos. PLoS ONE 5: 10.1371/journal.pone.0015308 Article 2: 1. List the complete title of the article. (0.5 points) Temperature acclimation influences temperature related behavior as well as oxygen-transport physiology and biochemistry in the water flea Daphnia magna 2. List the author(s) of the article. (0.5 points) Tobias Lamkemeyer, Bettina Zeis , and Rudiger J. Paul 3. What is the question the research is trying to answer? What is the hypothesis being tested? What are the predictions being made? (3 points) The question being asked is to investigate the impact of temperature acclimation on temperature-related behavior, oxygen-transport physiology, and biochemistry in the water flea Daphnia magna. The hypothesis being tested is that temperature acclimation in Daphnia magna will result in changes in temperature-related behavior, oxygen-transport physiology, and biochemistry. One of the predictions being made is that the Daphnia magna that are acclimated Downloaded by M Pasel (mpasek655@gmail.com) lOMoARcPSD|29242783

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to higher temperatures will have physiological adaptations in oxygen transport. This could include changes in oxygen uptake rates or alterations in the expression of genes involved in oxygen transport. 4. What is the basic experimental design (2.5 pts) ? List the responding variable(s) including units, and two controlled variables (1.5 pts) . What is the manipulated variable (0.5 pts) ? How many treatments were there (0.5 pts) ? What are the treatments (1.5 pts)? -The basic experimental design involves manipulating the temperature acclimation of Daphnia magna and observing the effects on temperature-related behavior, oxygen-transport physiology, and biochemistry. -The responding variables are: temperature related behavior, oxygen-transport physiology which is measured through uptake rates, and biochemical factors such as enzyme activity. The controlled variables are the light intensity and food availability. The manipulated variable is the temperature acclimation. There were multiple treatment groups that represented different temperature acclimation conditions. The specific treatments involved exposing Daphnia magna to different temperature acclimation conditions. For example, there were treatment groups acclimated to a higher temperature, lower temperature, and a control group acclimated to the ambient temperature. 5. Were the hypotheses supported? Explain why or why not. (2 points) Yes the hypothesis was supported because when exposed 10 a linear thermal gradient between 6 and 32°C, animals acclimated to 10°C preferred temperatures between 11.7 and 13. 1°C animals acclimated to 20°C preferred temperatures between 16.2 and l 9.5°C and animals acclimated to 30°C preferred temperatures between 21.4 and 2 l. 7°C. Accordingly, the preferred temperature of D. magna in a thermal gradient is related to acclimation temperature. Lamkemeyer, T., B. Zeis, and R. J. Paul. 2003. Temperature acclimation influences temperature- related behavior as well as oxygen-transport physiology and biochemistry in the water flea Daphnia magna. Canadian Journal of Zoology 81:237-249. Downloaded by M Pasel (mpasek655@gmail.com) lOMoARcPSD|29242783

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