Skip to main content

Table 2 Initial similarity† and quartile distance†† in species richness and composition

From: To what extent does Tobler's 1st law of geography apply to macroecology? A case study using American palms (Arecaceae)

 

Initial similarity

R 2

Quartile distance/km

Similarity in richness

   

The Americas¤•

1.00

0.18*

1329

Amazon

0.96

0.72*

563

Andes

0.85

0.05*

1700

Caribbean•

(0.81)

ns

(53.295)

C. America•

0.90

0.16

814

Similarity in composition

   

The Americas¤•

0.84

0.47*

342

Amazon•

0.91

0.72*

751

Andes•

0.81

0.18*

581

Caribbean•

0.87

0.73*

523

C. America•

0.79

0.44*

644

  1. † Initial similarity = the similarity at a distance of 150 km. †† Quartile distance = 0.75 * initial similarity.
  2. ¤ Analyses were done for grid-pairs with a geographic distance of ≤ 4.000 km.
  3. • Geographical distance was ln-transformed.
  4. * p < 0.01.
Back to article page

BMC Ecology

ISSN: 1472-6785

Contact us