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I need help with this question especialy the method and the result and discussion . can you verify my graphs to see if what i

I need help with this question especialy the method and the result and discussion . can you verify my graphs to see if what i have done is correct i used the Spearman rank instead of using the Mann) Withney spreasheet. Could you tell me what would be best to use. And if you could look at my discussion i think they link anymore to the graphs if you could have a look

Question

Methods (10 marks)

Tables 1 and 2, below, show an edited data set of some of the components of the 'organizing framework' collected at two sites in Sevilleta. Note that in each of them, 'NA' means that no data are available for that variable in the relevant year. These data are also available in spreadsheet format from the 'Assessment' section of the module website.

YearPrecipitation/mmSoil moisture/relative water contentRabbit densityumber of individualshectare?1Coyote densityumber of individualskm?2
1989106.4NANANA
1990232.4NANANA
1991334.7NANANA
1992240.8NA0.0600.880
1993207.4NA0.2720.702
1994288.1NA0.1250.793
1995138.8NA0.2460.575
1996301.90.1120.1040.598
1997325.30.1230.1680.703
1998225.30.1140.1700.758
1999235.70.0940.1381.065
2000284.40.1050.0850.898
2001214.80.0950.0580.945
2002228.70.0960.0720.738
2003133.20.100NA0.543
2004301.40.112NA0.303
2005277.40.110NANA

YearPrecipitation/mmNPP/gm?2y?1Arthropodsumber of individualshectare?1Rodentsumber of individualshectare?1
1989NANANA268
1990NANANA122
1991NANANA102
1992NANA1193439
1993NANA986376
1994NANA1061195
1995NANA772595
1996NANA756118
1997NANA1811551
1998NANA795305
1999199.942.86747361
2000254.149.66323478
2001245.867.212416148
2002226.183.841451279
2003140.627.512158695
2004322.684.131650255
2005283.772.95NA476
2006345.8104.46NA301
2007253.1153.85NA997
2008272.9138.84NA404
200924542.14NA654
2010200.972.70NA202
2011152.934.56NA239
2012133.5NANA335
2013274.1NANA174

Use the data in these tables to complete the tasks and questions outlined below.

a.Summarise what variables are present in the data for each site, including the number of replicates and the duration of the studies. (Onesentence for each site)

b.Pick two of the variables in Table1 and compose a hypothesis linking them ('Hypothesis1') that you could investigate using the data in that table. Provide an explanation of the scientific basis for your choice.

c.Looking at the data in Table2, and assuming that the majority of arthropods (such as grasshoppers) in this community eat plant material and that the rodents eat seeds and arthropods, suggest another hypothesis ('Hypothesis2') about how two of these variables might be linked to each other. Provide an explanation of the scientific basis for your choice.

d.Provide an example from either table of a link between variables that may operate with a time lag. Suggest a third hypothesis (Hypothesis 3) that describes this link.

Results (15 marks)

  • a.Use a spreadsheet program to draw a graph that is suitable for investigating a correlation between the two variables in your Hypothesis 1. Use an appropriate statistical test to test for a correlation between these variables. Comment on whether your result is statistically significant.
  • b.Now use a spreadsheet program to draw a graph that is suitable for investigating a correlation between the two variables in your Hypothesis 2. Use an appropriate statistical test to test for a correlation between these variables. Again, comment on whether your result is statistically significant.
  • c.Finally, use your spreadsheet software to draw a graph that is suitable for investigating the correlation between the variables in your Hypothesis 3. Use an appropriate statistical test to test for a correlation between these variables. Again, comment on whether your result is statistically significant.

Paste the results obtained in this section into your emTMA answer.

Discussion (15 marks)

For each of your three hypotheses:

explain whether your data analysis supports your hypothesis and provide a scientific explanation for your result, linking to theoretical concepts and any relevant examples from other research that you have investigated

outline alternative interpretations of the results, including how you might refine your initial hypothesis in light of your results; suggest additional investigations and experiments that would enable you to test your hypothesis further

place your results in context, with reference to other studies or sources of information.

Organise your answer as follows:

Part a) deals with Hypothesis 1

Part b) deals with Hypothesis 2

Part c) deals with Hypothesis 3.

You must include reference to research from outside the module materials in your answer.

My WORK

Method:

  1. Site 1: The variables are Year, Precipitation (mm), Soil moisture (relative water content), Rabbit density (number of individuals per hectare), and Coyote density (number of individuals per km^2). The study spans from 1989 to 2005, with varying numbers of replicates for each variable due to some data being unavailable in certain years.

Site 2: The variables are Year, Precipitation (mm), NPP (g m^-2 y^-1), Arthropods (number of individuals per hectare), and Rodents (number of individuals per hectare). The study spans from 1989 to 2013, with varying numbers of replicates for each variable due to some data being unavailable in certain years.

b. Hypothesis 1: There is a relationship between precipitation and rabbit density. The scientific basis for this hypothesis is that precipitation can influence the availability of food resources for rabbits, which in turn can affect their population density.

c. Hypothesis 2: There is a relationship between NPP (Net Primary Productivity) and the number of arthropods. The scientific basis for this hypothesis is that NPP represents the amount of energy available in the ecosystem, which can influence the population size of primary consumers like arthropods.

d. An example of a link between variables that may operate with a time lag could be between precipitation and NPP. Changes in precipitation may not immediately affect NPP, as plants may take time to respond to changes in water availability. Hypothesis 3 could be: Changes in precipitation will affect NPP with a time lag of one year.

Results:

a)

image text in transcribedimage text in transcribedimage text in transcribed
Hypothesis 1 Precipitation/mm OHNWAUMNO 0 50 100 150 200 250 300 350 Rabit density/ number of individual hectar-1 . Sample 1 Rank (R1) .Sample 2 x2 . Sample 2 Rank (R2)\f\f

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