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Macroecology & uneven distributions of wealth Ken Locey.

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Presentation on theme: "Macroecology & uneven distributions of wealth Ken Locey."— Presentation transcript:

1 Macroecology & uneven distributions of wealth Ken Locey

2 http://tchester.org/srp/plants/communities/figures/global_biodiversity_by_area.gif

3 183,913,348 records of birds in the Global Biodiversity Information Facility database

4 Abundance: n i /N Distribution: f(k;λ) = λ k e -λ /k! Diversity: H’ = -Σp i *ln(p i ) …study of ecological relationships that involves characterizing and explaining statistical patterns of… Macroecology

5 Land birds Land mammals Geographic range patterns North-South (km) East-West (km) 100 1,000 10,000

6 Metabolic Theory of Ecology (MTE) Ecological phenomenon ∝ M 3/4 e -E/kt Temp. corrected max. rate of whole organism biomass production Slope = 0.76 R 2 = 0.99

7 Species Abundance Distribution Abundance Class frequency (frequency distribution)

8 http://encyclopediaurantia.org/images/ROM11.JPG

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10 DATA

11 Computing GIS Math & Stats Metabolic rate ∝ M 3/4 e -E/kt Information: Tools

12 COLLABORATION & SHARING Code development Sharing Source networks

13 GIS Programming Published Research Data management Math & Stats Collaboration Undergraduate & Graduate research Skills Jobs Grad School

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15 Center for Macroecology, Evolution, & Climate www.macroecology.ca macroecology.ku.dk whitelab.weecology.org

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18 Species Abundance Distribution Abundance Class frequency (frequency distribution)

19 Species Abundance Distribution Rank in Abundance Abundance (Rank-abundance distribution)

20 Wheat Production (tons) tons 62.9 104588178.7

21 Poverty in Rural America, 2008 Percent in Poverty 54.5 - 2525 - 2020 – 14.314.2 – 12.212.1 - 1010 – 3.1

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23 Distributions of Wealth (DOW) Supreme importance attaches to one economic problem, that of the distribution of wealth. Is there a natural law according to which the wealth of society is divided? – John Bates Clark Wealth: sources of human welfare which are material, transferable, and limited in quantity.

24 Total quantity ( Q) Community abundance Global Oil Consumption GDP, GNP Number of entities ( N) Species Nations Economic classes Distributions of Wealth (DOW)

25 If Q = 10 and N = 3, then: 8 unordered ways to sum N positive integers to obtain Q 8+1+1 7+2+1 6+3+1 6+2+2 5+4+1 5+3+2 4+4+2 4+3+3 Distributions of Wealth (DOW)

26 Do we observe the average of possible DOWs?

27 The feasible set (all possible shapes of the DOW) 16,958 shapes for Q = 50 & N = 10 Rank Wealth

28 Combinatorial Explosion QNSize of feasible set 501016,928 500102.013 × 10 12 5000101.531 × 10 21

29 Heat mapping the feasible set (or a random sample) ln(wealth) Rank Q=1,000 N=80

30 Heat mapping the feasible set (or a random sample) ln(abundance) Rank in abundance ca. 4.02x10 29 possible shapes for N=1000 & S=80

31 Q = Total community abundance ( i.e. number of individuals) N = Species richness (i.e. number of species) Ecological DOWs (species-abundance distributions)

32 Observed wealth 10 0 10 1 10 2 Predicted wealth 10 2 10 1 10 0 R 2 per site OBSERVED: [1, 2, 10, 12, 20, 30, 40, 60, 110] PREDICTED: [1, 2, 11, 11, 22, 28, 43, 50, 117] R 2 = 0.99

33 Observed abundance 10 0 10 1 10 2 Predicted abundance 10 2 10 1 10 0 R 2 per site R 2 = 0.99 R 2 = 0.89 R 2 = 0.80 R 2 = 0.75

34 Observed abundance 10 0 10 1 10 2 Predicted abundance 10 2 10 1 10 0 R 2 per site R 2 = 0.99 R 2 = 0.89 R 2 = 0.80 R 2 = 0.75 R 2 per site 0.0 1.0

35 Observed abundance 10 0 10 1 10 2 Predicted abundance 10 2 10 1 10 0 R 2 per site 0.0 1.0 R 2 = 0.93

36 Food & Agriculture Organization of the UN US Dept of Energy, Energy Information Admin.

37 0.830.910.93 Predicted supply Observed supply Food supply among nations (1960-2010) grams/capita/day * 0.1tons * 0.0001grams/capita/day

38 0.690.770.91 Predicted pop. size Observed pop. size Population sizes among nations (1960-2009, millions of people)

39 0.880.92 Predicted Observed Oil use among nations (1980-2009, barrels per day * 0.01)

40 Predicted home runs Observed home runs 0.930.880.90 0.91 0.89 0.940.93 (2002-2010) http://mlb.mlb.com

41 Are DOWs similar to the average of possible shapes? …very often Do Q and N constrain the DOW more than ever realized? …Yup Is the feasible set good for more than predictions? …Absolutely Is combinatorial explosion a pain in the *expletive*? …Not for long…?

42 Funding USU College of Science – Willard L. Eccles Fellowship NSF CAREER award to Ethan White Research grant from Amazon Web Services

43 Acknowledgments Individuals, agencies, organizations responsible for the collection and management of the: – Breeding Bird Survey, Christmas Bird Count, Forest Inventory and Analysis, Mammal Community Database, North American Butterfly Association, Argonne National Laboratory’s MG-RAST metagenomic server Colleagues & Collaborators – USU: Ethan White, Xiao Xiao, Dan McGlinn – Berkeley Harte Lab: Justin Kitzes – SESYNC: Bill Burnside UCO college of Math and Science

44 The feasible set as a framework Understanding Comparing Inequality

45 Percentile of the feasible set Gini’s coefficient of inequality

46 The feasible set (all possible values of species evenness) Species evenness Species richness, S Total abundance, N = 60

47 Combinatorial Explosion QNSize of feasible set 100010886,745,696,653,253 1000100 302,194,941,264,401,427,042,462,944,147 1000900190,569,292

48 Feasible sets are dominated by hollow-curves Q=50, N=20 Q=50, N=10 Evenness (Smith & Wilson, 1996)

49 MTE prediction: species richness decreases with temperature (S ∝ Ae -E a /kT ) Computer Science Student: Biology student: Chemistry Student models based on chemical kinetics/activation energy microbe data, reasons why MTE should (not) work for microbes model development data scraping & management Temperature-richness predictions of MTE do not hold for diverse microbe communities as tested using several models of chemical kinetics. This may be explained by microbial dormancy and dispersal. + Conclusion(?)

50 Body mass (g) Land birdsLand mammals Body-size distributions Number of species continental regional patch


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