Table 1.
Parameter values and temperature-dependent functions used in model simulations. Examples of function implementation are provided using mass (Mi) of 5 (mass units), temperature (T) of 298 K, population biomass (Ni) of 1 (mass units) and prey population biomass (Nj) of 1 (mass units). Boltzmann's constant (k) is used, but for clarity its value (8.62 × 10−5 eV K−1) is not written out in the table.
| parameter or function | description and example function implementation | value (units) |
|---|---|---|
| α* | mutation rate normalization | 14 722 190 (mutations mass−0.75 d−1) |
| (α*)(Mi−0.25)(e−E/kT)(Ni) | mutation rate = (α*)(5−0.25)(e−0.65/(298k))(1) | 10−4 (mutations d−1) |
| ν | ecosystem nutrient retention efficiency | 0.5 (unitless) |
| μ | nutrient loss rate | 0.1 (d −1) |
| I* | nutrient influx rate normalization | 432 819 544 708 (mass d−1) |
| (I*)(e−E/kT) | nutrient influx rate = (I*)(e−0.65/(298k)) | 4.44 (mass d−1) |
| β | interference competition max. body size difference | 0.25 (mass) |
| c* | interference competition rate constant | 0.1 (mass−1 d−1) |
| m* | mortality rate normalization | 9 845 321 734 (mass0.25 d−1) |
| (m*)(Mi−0.25)(e−E/kT)(Ni) | mortality rate = (m*)(5−0.25)(e−0.65/(298k))(1) | 0.067 (mass d−1) |
| f* | feeding rate normalization | 117 081 266 560 (mass0.25 d−1) |
| (f*)(Mi−0.25)(e−E/kT)×(NiNj) (1/√(2πσ2)) | max. feeding rate = (f*)(5−0.25)(e−0.65/(298k))×(1)(1/√(2π)) | 0.32 (mass d−1) |
| σ | feeding function standard deviation | 1 (mass) |
| d | optimal body size difference | 2 (mass) |
| σ2/d | consumer niche breadth | 0.5 (mass) |
| ɛ | assimilation efficiency | 0.25 (unitless) |
*Normalization constant.