Questions
BIOLOGY 1114.01 SP2025 (17927) Weekly Review 12 (End global warming)
Single choice
Given your answers to the previous questions, revisit the original question prompt and select the best answer: Dr. Amy Angert, Dr. Celine Bonfils, and Dr. Inez Fung evaluated the relationship between growing season temperatures, spring CO2 uptake, and total growing season CO2 uptake between 1985 and 2003. Consider their figure and figure caption depicting these data below below. Figure. Yearly variation in spring and total growing season carbon uptake. Average values for CO2 uptake and temperature are set to 0 in the anomaly plot. The mean anomalies in CO2 uptake by Northern Hemisphere (>20° latitude) vegetation were calculated for 1985–2003 as parts per million (ppm) CO2 uptake per year Net spring CO2 uptake during June is shown in the solid green line. Total growing season CO2 uptake from March to August (spring and summer) is shown in the dashed blue line. Anomalies in average growing season temperatures are shown in the solid yellow line (degC). Years with higher average temperatures were associated with earlier timing of budburst. Given the information in the figure and figure caption, which of the following accurately describes CO2 uptake by the biospheric C pool given the information presented in the figure and caption? p.s. If you're interesting in why this trend happened, check out the citation! It's interesting stuff :) A. Angert, S. Biraud, C. Bonfils, C. C. Henning, W. Buermann, J. Pinzon, C. J. Tucker, and I. Fung. Proc. Natl. Acad. Sci. U. S. A., 102 (2005), pp. 10823-10827 (original data from this citation) Elsa E. Cleland, Isabelle Chuine, Annette Menzel, Harold A. Mooney, Mark D. Schwartz, Shifting plant phenology in response to global change, Trends in Ecology & Evolution,22(7) 2007. Redrawn figure from this citation.
Options
A.Earlier budburst in warm years resulted in higher total growing season CO2 uptake throughout the time series from 1985 to 2003.
B.Earlier budburst in warm years resulted in higher total growing season CO2 uptake from 1985-1991. However, after roughly 1999, earlier budburst was associated with higher spring CO2 uptake with no elevation in summer CO2 uptake.
C.Earlier budburst in warm years resulted in spring CO2 uptake throughout the time series from 1985 to 2003. However, lower summer CO2 uptake resulted in no net increases in total growing season CO2 uptake at any point in the time series.
D.There is no relationship between temperature, earlier budburst, and CO2 uptake by the biosphere.
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Step-by-Step Analysis
To tackle this question, I’ll parse what the figure and its caption convey about CO2 uptake, temperature, and budburst timing across the 1985–2003 window, then evaluate each answer choice against that information.
Option A: 'Earlier budburst in warm years resulted in higher total growing season CO2 uptake throughout the time series from 1985 to 2003.' The figure shows that total growing-season CO2 uptake (blue dashed line) fluctuates over time and does not steadily increase across the entire period simply due to earlier budburst. If earlier budburst universally boosted total uptake for the whole 1985–2003 span, the blue line would consistently be higher in warm year......Login to view full explanationLog in for full answers
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