In ecology, the term \"abundance\" refers to the number of individual animals se
ID: 3070535 • Letter: I
Question
In ecology, the term "abundance" refers to the number of individual animals seen over a period of time at a particular location. The following diagram represents estimates of the eastern north Pacific gray whale based on sightings from a research station in California. 3. Gray Whale Abundance Predicted from Sightings at Granite Canyon Research Station 30 000- 25 20 000- 5 000 0 0 000- 1970 990 Year O NOAA Research a. Explain how this diagram can be interpreted. b. Can you say that the gray whale abundance was higher in 1970 than in 1971? Explain. c. Is the statement "gray whale populations have been estimated as high as 22 000 in 2008" a reasonable interpretation of the diagram?Explanation / Answer
(a) this is an error bar diagaram.
An error bar is a line through a point on a graph, parallel to one of the axes, which represents the uncertainty or variation of the corresponding coordinate of the point. In IB Biology, the error bars most often represent the standard deviation of a data set. It can be used to compare visually two quantities if various other conditions hold. This can determine whether differences are statistically significant. Error bars can also suggest goodness of fit of a given function, i.e., how well the function describes the data. Scientific papers in the experimental sciences are expected to include error bars on all graphs, though the practice differs somewhat between sciences, and each journal will have its own house style
(b) Yes, gray whale abundance was higher in 1970 than in 1971. as bold dot is ( middle of the veritcal line) corresponding to 1970 is above than that of 1971
(c) No, 22000 in 2008 is not true according to diagram . Dot corresponding to yera 2008, is about 10000( you circled mannaully also), as it is parallel to the 10000 on ordinate ( y-axis)