Table 2 Simultaneous autoregressive models fit area-corrected taxon richness achieved by method 1 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 1 | n | First-order | Second-order | |||||
|---|---|---|---|---|---|---|---|---|
S | C | r 2 | Q | S | C | r 2 | ||
Elevation | ||||||||
Seed plant species richness | 37 | −6.4 × 10−2 | 4.9 × 102 | 0.307*** | 5.4 × 10−5 | −4.1 × 10−1 | 9.9 × 102 | 0.351*** |
Seed plant genus richness | 37 | −9.8 × 10−2 | 6.2 × 102 | 0.504*** | 6.9 × 10−5 | −5.3 × 10−1 | 1.2 × 103 | 0.605* |
Seed plant family richness | 37 | −9.6 × 10−2 | 6.2 × 102 | 0.624*** | 6.2 × 10−5 | −4.9 × 10−1 | 1.2 × 103 | 0.727* |
Tree species richness | 30 | −6.2 × 10−2 | 2.5 × 102 | 0.689*** | 3.5 × 10−5 | −2.6 × 10−1 | 5.1 × 102 | 0.737*** |
Shrub species richness | 37 | −1.5 × 10−2 | 1.2 × 102 | 0.628*** | 1.1 × 10−5 | −8.5 × 10−2 | 2.1 × 102 | 0.702*** |
Herb species richness | 37 | −2.4 × 10−2 | 2.9 × 102 | 0.266*** | 2.0 × 10−5 | −1.6 × 10−1 | 4.8 × 102 | 0.276*** |
Group I species richness | 29 | −2.4 × 10−3 | 3.1 × 10 | 0.115 | 1.6 × 10−6 | −1.2 × 10−2 | 4.2 × 10 | 0.120 |
Group II species richness | 34 | −3.1 × 10−3 | 2.1 × 10 | 0.218** | 3.2 × 10−6 | −2.3 × 10−2 | 4.8 × 10 | 0.254*** |
Group III species richness | 37 | −7.1 × 10−2 | 5.6 × 102 | 0.369*** | 5.9 × 10−5 | −4.5 × 10−1 | 1.1 × 103 | 0.410*** |
Mean annual temperature | ||||||||
Seed plant species richness | 37 | 1.1 × 10 | 2.0 × 102 | 0.295*** | 1.4 | −1.3 × 10 | 2.5 × 102 | 0.320*** |
Seed plant genus richness | 37 | 1.7 × 10 | 1.5 × 102 | 0.488*** | 2.2 | −2.0 × 10 | 2.4 × 102 | 0.567* |
Seed plant family richness | 37 | 1.7 × 10 | 1.6 × 102 | 0.609*** | 2.0 | −1.9 × 10 | 2.5 × 102 | 0.695* |
Tree species richness | 30 | 1.1 × 10 | −4.0 × 10 | 0.670*** | 9.8 × 10−1 | −9.5 | 4.3 × 10 | 0.705** |
Shrub species richness | 37 | 2.6 | 4.5 × 10 | 0.619*** | 3.5 × 10−1 | −3.4 | 5.9 × 10 | 0.679*** |
Herb species richness | 37 | 3.6 | 1.8 × 102 | 0.261*** | 2.8 × 10−1 | −1.1 | 1.9 × 102 | 0.263*** |
Group I species richness | 29 | 3.9 × 10−1 | 2.0 × 10 | 0.111 | 2.3 × 10−2 | −1.0 × 10−1 | 2.2 × 10 | 0.112 |
Group II species richness | 34 | 5.0 × 10−1 | 7.1 | 0.209** | 7.4 × 10−2 | −8.8 × 10−1 | 1.1 × 10 | 0.227** |
Group III species richness | 37 | 1.2 × 10 | 2.4 × 102 | 0.358*** | 1.5 | −1.3 × 10 | 2.9 × 102 | 0.380*** |
Mean annual precipitation | ||||||||
Seed plant species richness | 37 | −2.5 | 2.7 × 103 | 0.295*** | 2.8 × 10−2 | −5.5 × 10 | 2.8 × 104 | 0.299** |
Seed plant genus richness | 37 | −1.6 | 1.9 × 103 | 0.379*** | 2.7 × 10−2 | −5.3 × 10 | 2.6 × 104 | 0.382*** |
Seed plant family richness | 37 | −1.5 | 1.7 × 103 | 0.500*** | 2.6 × 10−2 | −5.1 × 10 | 2.5 × 104 | 0.504*** |
Tree species richness | 30 | −2.9 × 10−1 | 3.6 × 102 | 0.533*** | −8.4 × 10−4 | 1.3 | −4.1 × 102 | 0.533*** |
Shrub species richness | 37 | −2.7 × 10−1 | 3.2 × 102 | 0.556*** | 2.1 × 10−4 | −6.7 × 10−1 | 5.2 × 102 | 0.556*** |
Herb species richness | 37 | −2.1 | 2.3 × 103 | 0.341** | 6.1 × 10−3 | −1.4 × 10 | 7.9 × 103 | 0.342** |
Group I species richness | 29 | 4.2 × 10−2 | −1.6 × 10 | 0.102 | −1.8 × 10−3 | 3.5 | −1.6 × 103 | 0.106 |
Group II species richness | 34 | −8.3 × 10−2 | 9.1 × 10 | 0.195** | −7.7 × 10−4 | 1.4 | −6.2 × 102 | 0.196** |
Group III species richness | 37 | −3.0 | 3.2 × 103 | 0.372*** | 3.4 × 10−2 | −6.8 × 10 | 3.4 × 104 | 0.378*** |
Mid-domain effect | ||||||||
Seed plant species richness | 37 | −9.0 × 10−1 | 5.2 × 102 | 0.317*** | 1.2 × 10−2 | −5.6 | 8.1 × 102 | 0.493*** |
Seed plant genus richness | 37 | −1.5 | 5.2 × 102 | 0.452*** | 2.7 × 10−2 | −8.1 | 7.9 × 102 | 0.554*** |
Seed plant family richness | 37 | −4.5 | 5.5 × 102 | 0.571*** | 2.0 × 10−1 | −2.1 × 10 | 7.9 × 102 | 0.645*** |
Tree species richness | 30 | −1.9 × 10 | 7.2 × 102 | 0.857*** | 4.8 × 10−1 | −2.9 × 10 | 4.8 × 102 | 0.954*** |
Shrub species richness | 37 | −1.3 | 1.2 × 102 | 0.647*** | 3.8 × 10−2 | −3.4 | 1.3 × 102 | 0.697*** |
Herb species richness | 37 | −5.0 × 10−1 | 3.0 × 102 | 0.274*** | 1.7 × 10−2 | −5.1 | 5.1 × 102 | 0.451*** |
Group I species richness | 29 | −2.5 | 7.9 × 10 | 0.349 | −4.2 × 10−1 | 1.2 × 10 | −3.1 × 10 | 0.356 |
Group II species richness | 34 | −8.6 × 10−1 | 5.8 × 10 | 0.580*** | 3.1 × 10−2 | −2.9 | 7.5 × 10 | 0.767*** |
Group III species richness | 37 | −8.0 × 10−1 | 4.8 × 102 | 0.344*** | 2.0 × 10−2 | −6.6 | 7.5 × 102 | 0.470*** |