Karina J. Nielsen. 2001. Bottom-up and top-down forces in tide pools: test of a food chain model in an intertidal community. Ecological Monographs 71:187-217.
Table A1. Regression equations used to calculate animal biomass.
| Species | Equation | R2 | P | N | Range |
| Size | |||||
| Amphissa columbiana | Bm = -0.19999 + 0.0362(sz) | 0.823 | 0.0001 | 48 | 5-17 mm |
| Bittium eschrichtii | Bm = -0.1031 + 0.0241(sz) | 0.946 | 0.0001 | 16 | 6-12 mm |
| Calliostoma ligatum |
Log(bm) = -6.2231 + 0.5356(sz) - 0.0122(sz2) |
0.890 | 0.0001 | 135 | 2-25 mm |
| Chitons | Bm = -1.3880 + 0.1250(sz) | 0.869 | 0.0001 | 15 | 6-37 mm |
| Hemigrapsus nudus | Sqrt(bm) = -0.0293 + 0.0382(sz) | 0.690 | 0.0001 | 62 | 0.6-11 mm |
| Idotea wosnesenskii | Log(bm) = -6.1395 + 0.1559(sz) | 0.616 | 0.0001 | 128 | 5-27 mm |
| Lepidochitona dentiens | Bm = -0.0211 + 0.0058(sz) | 0.525 | 0.0002 | 20 | 4-10 mm |
| Limpets >10mm | Log(bm) = -4.7905 + 0.1885(sz) | 0.916 | 0.0001 | 32 | 10-25 mm |
| Nucella emarginata | Bm = -0.4351 + 0.0677(sz) | 0.908 | 0.0001 | 15 | 6-18 mm |
| Pagurus samuelis | Bm = -0.9067 + 0.1080(sz) | 0.772 | 0.0002 | 11 | 10-35 mm |
| Pugettia producta |
Log(bm) = -6.7241 + 0.6695(sz) - 0.0165(sz2) |
0.840 | 0.0001 | 56 | 3-15 mm |
| Searlesia dira | Bm = -0.2153 + 0.0450(sz) | 0.898 | 0.0001 | 19 | 3-21 mm |
| Strongylocentrotus purpuratus |
Bm = 0.2692 - 0.1061(sz) + 0.0100(sz2) |
0.997 | 0.0001 | 35 | 5-63 mm |
| Tectura scutum |
Bm =1.0779 - 0.1376(sz) + 0.0051(sz) |
0.847 | 0.0001 | 15 | 10-24 mm |
| Tegula funebralis | Log(bm) = -7.1549 + 0.8993(sz) + 0.0368(sz2) + 0.0006(sz3) | 0.992 | 0.0001 | 102 | 3-30 mm |
| Tonicella lineata | Sqrt(bm) = 0.0875 + 0.0243(sz) | 0.625 | 0.0001 | 78 | 0.5-33 mm |
| Number of individuals | |||||
| Lacuna marmorata | Log(bm) = -4.2938 + 0.0141(no) | 0.508 | 0.0001 | 50 | 1-350 |
| Limpets >5 and <10 mm | Sqrt(bm) = 0.1511 + 0.0347(no) | 0.882 | 0.0001 | 86 | 1-22 |
| Limpets <5 mm | Log(bm) = -4.3429 + 0.0677(no) | 0.571 | 0.0001 | 53 | 1-80 |
| Littorina scutulata | Bm = 0.0121 + 0.291(no) | 0.888 | 0.0001 | 57 | 1-20 |
| Pagurus hirsutiusculus | Bm = -0.0162 + 0.0164(no) | 0.986 | 0.0001 | 13 | 1-30 |
Notes: Biomass (in grams dry mass) was calculated from: size for large animals (>10 mm), or number for small (<10 mm), abundant animals. Animals were dried to constant mass at 60 ° C. Chitons include: Katharina tunicata, Mopalia muscosa, M. lignosa, M. ciliata. Limpets include: Lottia digitalis, L. strigatella, L. pelta. Data were transformed as necessary to meet assumptions of normality and homoscedasticity. Adjusted R2 values are presented for all polynomial regressions. Bm = biomass (g); sz = size (mm); no = number of animals; log = natural log; sqrt = square root.