From: Estimating landscape structure effects on pollination for management of agricultural landscapes
Category | Metric | Equation | Range |
---|---|---|---|
Area and edge | |||
Area-MN | \(\frac{\sum_{j=1}^{n}{x}_{ij}}{{n}_{i}}\) | Area-MN > 0 | |
ED | \(\frac{\sum {e}_{ik}}{A}\left(10000\right)\) | 0 ≤ ED, no limit | |
Shape | PAFRAC | \(\frac{\frac{2}{\left[\sum_{j=1}^{n}{lnp}_{ij}-{lna}_{ij}\right]-\left[\left(\sum_{j=1}^{n}{lnp}_{ij}\right)\left(\left(\sum_{j=1}^{n}{lna}_{ij}\right)\right)\right]}}{\left(\sum_{j=1}^{n}{lnp}_{ij}^{2}\right)-{\left(\sum_{j=1}^{n}{lnp}_{ij}^{2}\right)}^{2}}\) | 1 ≦ PAFRAC ≦ 2 |
Aggregation | AI | \(\left(\frac{{g}_{ii}}{max\to {g}_{ii}}\right)\left(100\right)\) | 0 ≤ AI ≥ 100 |
NP | \({n}_{i}\) | NP ≥ 1 | |
ENN | \({h}_{ij}\) | ENN > 0 |