Table 3 Simultaneous autoregressive models fit area-corrected taxon richness achieved by method 2 against the first- and second-order polynomials of four variables (elevation, mean annual temperature, mean annual precipitation and prediction from mid-domain effect)
From: Altitudinal patterns of plant diversity on the Jade Dragon Snow Mountain, southwestern China
Area-corrected taxon richness 2 | n | First-order | Second-order | |||||
|---|---|---|---|---|---|---|---|---|
S | C | r 2 | Q | S | C | r 2 | ||
Elevation | ||||||||
Seed plant species richness | 37 | −4.0 × 10−3 | 2.2 × 102 | 0.893*** | −9.8 × 10−5 | 5.9 × 10−1 | −5.4 × 102 | 0.920*** |
Seed plant genus richness | 37 | −2.8 × 10−2 | 2.1 × 102 | 0.926*** | −3.9 × 10−5 | 2.1 × 10−1 | −9.5 × 10 | 0.952*** |
Seed plant family richness | 37 | −1.3 × 10−2 | 8.9 × 10 | 0.920*** | −1.0 × 10−5 | 4.7 × 10−2 | 1.2 × 10 | 0.946*** |
Tree species richness | 37 | −1.4 × 10−2 | 6.6 × 10 | 0.904*** | −2.0 × 10−6 | −2.6 × 10−3 | 5.1 × 10 | 0.905*** |
Shrub species richness | 37 | −1.1 × 10−2 | 7.0 × 10 | 0.870*** | −6.6 × 10−6 | 2.9 × 10−2 | 1.9 × 10 | 0.874*** |
Herb species richness | 37 | 2.1 × 10−2 | 8.8 × 10 | 0.884*** | −9.1 × 10−5 | 5.7 × 10−1 | −6.2 × 102 | 0.927*** |
Group I species richness | 37 | −3.6 × 10−3 | 6.0 × 10 | 0.231*** | −3.1 × 10−5 | 1.8 × 10−1 | −1.9 × 102 | 0.346* |
Group II species richness | 37 | −2.3 × 10−4 | 2.8 × 10 | 0.853*** | −2.1 × 10−5 | 1.2 × 10−1 | −1.3 × 102 | 0.859*** |
Group III species richness | 37 | −2.3 × 10−3 | 1.6 × 102 | 0.862*** | −7.7 × 10−5 | 4.6 × 10−1 | −4.3 × 102 | 0.933*** |
Mean annual temperature | ||||||||
Seed plant species richness | 37 | 5.0 × 10−1 | 2.1 × 102 | 0.893*** | −4.5 | 9.1 × 10 | −7.5 × 10 | 0.921*** |
Seed plant genus richness | 37 | 5.2 | 7.5 × 10 | 0.926*** | −1.8 | 4.1 × 10 | −3.8 × 10 | 0.954*** |
Seed plant family richness | 37 | 2.5 | 2.7 × 10 | 0.922*** | −4.6 × 10−1 | 1.2 × 10 | −1.9 | 0.951*** |
Tree species richness | 37 | 2.8 | −4.8 | 0.906*** | −1.3 × 10−1 | 5.3 | −1.3 × 10 | 0.907*** |
Shrub species richness | 37 | 2.1 | 1.7 × 10 | 0.871*** | −3.3 × 10−1 | 8.6 | −3.0 | 0.876*** |
Herb species richness | 37 | −4.3 | 1.9 × 102 | 0.885*** | −4.2 | 7.9 × 10 | −6.4 × 10 | 0.930*** |
Group I species richness | 37 | 7.6 × 10−1 | 4.2 × 10 | 0.232*** | −1.3 | 2.7 × 10 | −6.0 × 10 | 0.368* |
Group II species richness | 37 | −5.3 × 10−3 | 2.7 × 10 | 0.853*** | −1.0 | 2.1 × 10 | −3.7 × 10 | 0.860*** |
Group III species richness | 37 | 2.3 × 10−1 | 1.5 × 102 | 0.862*** | −3.6 | 7.1 × 10 | −6.8 × 10 | 0.937*** |
Mean annual precipitation | ||||||||
Seed plant species richness | 37 | 3.6 × 10−1 | −1.3 × 102 | 0.893*** | 4.4 × 10−2 | −8.5 × 10 | 4.1 × 104 | 0.894*** |
Seed plant genus richness | 37 | 1.3 | −1.1 × 103 | 0.933*** | −2.2 × 10−2 | 4.3 × 10 | −2.1 × 104 | 0.934*** |
Seed plant family richness | 37 | 5.6 × 10−1 | −4.8 × 102 | 0.932*** | −1.9 × 10−2 | 3.7 × 10 | −1.8 × 104 | 0.945*** |
Tree species richness | 37 | 5.7 × 10−1 | −5.2 × 102 | 0.898*** | −3.9 × 10−2 | 7.6 × 10 | −3.7 × 104 | 0.918*** |
Shrub species richness | 37 | 5.1 × 10−1 | −4.5 × 102 | 0.880*** | −3.0 × 10−2 | 5.9 × 10 | −2.9 × 104 | 0.892*** |
Herb species richness | 37 | −6.9 × 10−1 | 8.1 × 102 | 0.881*** | 1.1 × 10−1 | −2.1 × 102 | 1.0 × 105 | 0.890*** |
Group I species richness | 37 | 6.7 × 10−1 | −5.9 × 102 | 0.279** | −5.5 × 10−2 | 1.1 × 102 | −5.2 × 104 | 0.383 |
Group II species richness | 37 | 4.5 × 10−2 | −1.6 × 10 | 0.853*** | −1.5 × 10−2 | 3.0 × 10 | −1.4 × 104 | 0.853*** |
Group III species richness | 37 | 2.2 × 10−1 | −5.1 × 10 | 0.863*** | 3.2 × 10−2 | −6.2 × 10 | 3.0 × 104 | 0.865*** |
Mid-domain effect | ||||||||
Seed plant species richness | 37 | 7.3 × 10−1 | 3.7 × 10 | 0.909*** | 3.9 × 10−3 | −1.1 | 2.3 × 102 | 0.911*** |
Seed plant genus richness | 37 | 1.1 × 10−1 | 1.1 × 102 | 0.890*** | −3.2 × 10−3 | 9.5 × 10−1 | 6.7 × 10 | 0.892*** |
Seed plant family richness | 37 | −1.2 × 10−1 | 5.8 × 10 | 0.801*** | −1.6 × 10−2 | 1.4 | 2.7 × 10 | 0.810*** |
Tree species richness | 37 | −8.8 × 10−1 | 5.0 × 10 | 0.858*** | −6.1 × 10−2 | 2.6 | 4.6 | 0.861*** |
Shrub species richness | 37 | −2.2 × 10−1 | 4.7 × 10 | 0.839*** | −3.6 × 10−2 | 2.7 | −5.0 | 0.844*** |
Herb species richness | 37 | 1.2 | −5.3 × 10 | 0.923*** | 1.0 × 10−2 | −2.1 | 1.9 × 102 | 0.930*** |
Group I species richness | 37 | 5.8 × 10 | −1.3 × 103 | 0.271*** | 9.6 × 10 | −4.3 × 103 | 4.9 × 104 | 0.279*** |
Group II species richness | 37 | 4.6 × 10−1 | 2.6 | 0.853*** | 2.5 | −2.4 × 102 | 5.5 × 103 | 0.857*** |
Group III species richness | 37 | 6.4 × 10−1 | 5.1 × 10 | 0.909*** | 2.7 × 10−3 | −2.3 × 10−1 | 1.1 × 102 | 0.911*** |