Table 1.

Pearson correlation coefficients between network indicators and port capacity.

Network indicators	GLSN	Port communities
		C1	C2	C3	C4	C5	C6	C7
B	0.76**	0.84**	0.91**	0.91**	0.92**	0.80**	0.92**	0.87**
Z	0.50**	0.49**	0.52**	0.59**	0.64**	0.60*	0.55**	0.70**
P	0.38**	0.58**	0.46**	0.52**	0.54**	0.16	0.34**	0.56**
K	0.77**	0.78**	0.84**	0.81**	0.90**	0.99**	0.86**	0.84**
BC	0.68**	0.56**	0.84**	0.83**	0.91**	0.89**	0.89**	0.77**
φ	0.62**	0.79**	0.80**	0.66**	0.69**	1.00**	0.71**	0.83**
ρC	0.26**	0.65**	0.58**	0.14	0.28*	0.99**	0.25*	0.62**
ρCM	0.58**	0.79**	0.81**	0.59**	0.66**	0.99**	0.67**	0.84**

Note: Network indicators B, Z, P, K, and BC denote gateway-ness, provincial-ness, connector-ness, degree, and betweenness centrality, respectively; φ, the unnormalized rich-club coefficient originally proposed in reference⁴³; ρ_C and ρ_CM, two normalized versions of the rich-club coefficient proposed in reference⁴⁴ and in reference⁴⁵, respectively. Pearson correlation coefficients between network indicators and port capacity are calculated for all ports in the GLSN, as well as separately for ports in individual communities (i.e., C1, C2, C3, C4, C5, C6, C7). C5 is the smallest module that consists of a few ports with similar degree and capacity (and cannot be further divided into submodules).

**p-value < 0.001, *p-value < 0.01.