Electronic Supplementary Material s33

Electronic Supplementary Material

Spatial and Temporal variation in phosphorus budgets for 24 watersheds in the Lake Erie and Lake Michigan basins

Haejin Han1*, Nathan Bosch2 and J. David Allan1

1 University of Michigan, School of Natural Resources and Environment, 2 Grace College, Department of Science and Mathematics *Corresponding author: [email protected]

Contents: 7 pages, 1 Figures, 4 Tables Figure S1. Scatter plots showing the temporal relationship between NAPI and annual TP exports over five different census years (1974, 1978, 1982, 1987, and 1992) for each of the 25 Lake Michigan and Lake Erie watersheds. Each panel represents one watershed and the points in the panel represent values for different years (see Table 1 for names of watersheds)

. Table S1. Hydrologic characteristics of the 18 Lake Michigan and 6 Lake Erie watersheds. Annual precipitation and river water discharge included for 1974-1992 in 5-year intervals. ID Watershed Precipitation Water discharge (mm/yr) (mm/yr) 74 78 82 87 92 Avg. 74 78 82 87 92 Avg. 1 Root 883 975 903 961 788 902 427 328 403 266 260 337 2 Milwaukee 877 895 872 882 697 845 382 299 316 250 228 295 3 Sheboygan 855 930 947 851 695 856 291 287 286 191 212 253 4 Fox 736 911 873 676 804 800 245 236 301 207 277 253 5 Oconto 762 860 874 643 850 798 295 288 295 191 339 282 6 Peshtigo 758 831 877 651 790 781 296 262 319 202 320 280 7 Menominee 737 813 908 684 760 780 301 300 372 214 316 301 8 Ford 831 874 937 733 778 831 321 374 397 171 330 319 9 Escanaba 818 929 909 784 784 845 279 391 397 218 333 324 10 Manistique 865 908 876 707 816 834 499 603 539 304 439 477 11 Manistee 852 756 914 790 841 831 418 388 438 411 492 429 12 Pere- Marq. 1058 856 1074 766 801 911 447 366 424 358 429 405 13 Muskegon 868 750 890 756 823 817 370 278 334 276 386 329 14 Grand (MI) 858 775 854 813 880 836 393 212 298 229 357 298 15 Kalamazoo 871 928 922 848 918 897 446 331 403 313 390 377 16 St. Joseph 859 897 974 900 982 922 387 339 463 271 389 370 17 Trail Creek 933 902 1016 1024 999 975 438 433 589 399 447 461 18 Burns Ditch 989 878 1005 1033 927 966 150 290 505 175 376 299 Area-weighted avg. 820 849 904 771 845 838 344 290 361 248 348 318 (LM) 19 Huron 789 703 849 776 905 804 396 206 310 189 344 289 20 Raisin 802 776 884 851 984 859 318 252 332 197 325 285 21 Maumee 810 787 933 782 1056 874 323 288 466 165 390 326 22 Sandusky 873 811 919 860 1089 910 344 341 423 192 426 345 23 Cuyahoga 100 1089 915 970 896 1140 2 575 431 518 408 517 490 24 Grand (OH) 104 1156 934 950 1041 1134 3 NA 350 602 472 500 481 Area-weighted avg. 105 855 799 923 821 890 349 297 447 209 399 340 (LE) 1 Table S2. Phosphorus content of harvested crops and the partitioning ratios used to classify crops as livestock feed or human food by commodity. Modified from Lander et al. (1998) and Schaefer and Alber (2007).

Fraction Fraction Proportion Yield Phosphorus of crops of crops remaining Crop type unit content fed to fed to after (YU) humans animals handling loss (kg-P/YU) (%) (%) (%) Field corn for grain Bushel 0.07 4 96 90 Field corn for silage Ton 0.48 0 100 100 Wheat Bushel 0.10 61 39 90 Oats Bushel 0.05 6 94 90 Barley Bushel 0.08 3 97 90 Sorghum for grain Bushel 0.08 0 100 90 Sorghum for silage Bushel 1.11 0 100 100 Irish potatoes Cwt. 0.03 100 0 90 Rye for grain Bushel 0.08 17 83 90 Alfalfa hay Ton 2.14 0 100 100 Other hay Ton 6.94 0 100 100 Soybean Bushel 0.16 2 98 90 Crop pasture Acre 13.6 0 100 90 Non-crop pasture Acre 2.5 0 100 90 Table S3. Summary of rates used to estimate animal N products.

Average weight Animal per animal or Edible portion P % edibl Animal animal product yield c in edible portion e in kg a as % of live weight product

Cattle Beef 463 42.2 4.8 Calf Veal 103 41 3.2

Pigs & Hogs Pork 112 53.6 0.52

Sheep Lamb 44.6 49.8 4.8 Layer Chicken 2.16 73 2.16 Egg 0.058 89d 1.76 Broiler Broiler 1.71 69 1.71 Turkey Turkey 8.51 79 2.93 Milk 9091b 100 0.496 a The average live weight per animal at the market during 1974-1992 b The weight of milk production per head of milk cow in kg/head/yr c Edible portion only includes separate lean, trimmed to 0" fat, excluding hair, skins, bones, fats and intestines d The proportion of the edible portion of a whole egg excluding shell Table S4. The factors of confinement and recoverability and rates of P excretion and consumption for each of the livestock classes.

Average Confinement 2 Consumption live Recove 2 Excretion 3 Livestock Factor weight1 rability group (kg/head) factor 2 As excreted After loss (kg-P/ IL IN MI OH WI (kg-P/ head/yr) head/yr) Milk cow 650.0 0.98 0.82 0.61 0.92 0.92 0.92 19.02 16.34 25.11 Breeding herd 460.0 0.98 0.10 0.10 0.08 0.10 0.08 20.05 17.09 32.08 Beef calf 98.0 0.98 0.10 0.10 0.08 0.10 0.08 2.58 2.20 4.02 Dairy calf 98.0 0.98 0.82 0.61 0.92 0.92 0.92 1.54 1.30 3.65 Beef heifer 403.0 0.98 0.10 0.10 0.08 0.10 0.08 6.31 5.34 8.03 Milk heifer 489.0 0.98 0.82 0.61 0.92 0.92 0.92 7.66 6.48 9.27 Beef stocker 266.0 0.98 0.10 0.10 0.08 0.10 0.08 7.02 5.96 8.03 Dairy stocker 266.0 0.98 0.61 0.51 0.82 0.77 0.77 4.17 3.53 8.03 Fattened cattle 403.0 0.90 0.67 0.83 0.83 0.78 0.78 14.38 12.21 23.01 Breeding hog 114.0 0.95 0.74 0.84 0.69 0.79 0.69 2.98 2.52 6.72 Slaughter hog 34.0 0.95 0.74 0.84 0.69 0.79 0.69 1.64 1.40 3.39 Layer 2.2 0.98 1.00 0.97 1.00 1.00 1.00 0.25 0.21 0.57 Pullet 1.5 0.98 1.00 0.97 1.00 1.00 1.00 0.13 0.11 0.15 Broiler 1.7 0.98 1.00 0.97 1.00 1.00 1.00 0.20 0.17 0.33 Breeding turkey 8.5 0.98 0.97 0.97 0.46 0.71 0.71 1.02 0.87 1.44 Slaughter turkey 6.4 0.98 0.97 0.97 0.46 0.71 0.71 0.62 0.53 0.67 Sheep NA 1.452 2.20 Horse NA 6.862 11.43 Sources: 1NRC 1984,1985,1998;Kellogg et al. ,2000; 3OSU, 2000 References

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