Food Web Topology and Nested Keystone Species Complexes

Table 1

Topological properties and nestedness of multinode centrality sets for 27 food webs. The topological properties include the number of nodes (), the number of edges (), diameter (), average degree (avD), average shortest path length (avSPL), connectance (), average clustering coefficient (avCC), weighted clustering coefficient (wCC), and distance-based fragmentation (DF). Nestedness is always calculated for sets of to 4 nodes, based on fragmentation (), distance-based fragmentation (FR), weighted reachability (DR), and binary -reach for (M1), 2 (M2), and 3 (M3) steps.

Web				avD	avSPL		avCC	wCC	DF		DR	FR	M1	M2	M3
aka a	84	221	5	5.26	2.72	0.06	0.04	0.01	0.58	100	100	80.56	100	77.78	0
aka b	54	108	5	4	2.6	0.07	0.1	0.03	0.56	100	100	94.44	91.67	77.78	0
ber	77	232	5	6.03	2.63	0.08	0.03	0.01	0.57	94.44	100	100	86.11	38.89	5.56
black	85	366	4	8.61	2.45	0.1	0.04	0.03	0.53	100	94.44	77.78	100	41.67	5.56
broad	94	559	6	11.89	2.47	0.13	0.03	0	0.52	100	100	94.44	61.11	5.56	0
cant	108	693	5	12.83	2.37	0.12	0.04	0.01	0.52	100	100	100	100	8.33	16.67
carpinteria	128	1198	5	18.72	2.19	0.15	0.25	0.25	0.48	100	36.11	86.11	30.56	72.22	16.67
cat	48	107	5	4.46	2.42	0.09	0.02	0.01	0.53	100	86.11	100	77.78	33.33	0
cow1	58	118	7	4.07	2.9	0.07	0.11	0.06	0.59	100	91.67	100	100	50	0
cow17	71	142	4	4	2.73	0.06	0.15	0.04	0.59	100	100	55.56	100	72.22	0
demp au	83	410	6	9.88	2.47	0.12	0.03	0.01	0.53	50	100	27.78	100	47.22	0
demp sp	93	535	5	11.51	2.47	0.12	0.04	0.01	0.53	100	69.44	72.22	63.89	8.33	0
demp su	107	918	5	17.16	2.21	0.16	0.09	0.06	0.48	100	100	100	94.44	5.56	16.67
german	84	347	4	8.26	2.58	0.1	0.07	0.05	0.55	100	100	100	94.44	27.78	0
healy	95	603	4	12.69	2.3	0.13	0.07	0.03	0.5	91.67	100	100	94.44	16.67	0
kyeb	98	616	5	12.57	2.4	0.13	0.02	0.02	0.52	100	47.22	83.33	66.67	22.22	0
lilkye	78	372	5	9.54	2.49	0.12	0.07	0.02	0.53	91.67	100	94.44	100	41.67	8.33
martins	104	311	5	5.98	2.65	0.06	0.11	0.04	0.58	100	91.67	66.67	91.67	72.22	5.56
narr	71	142	5	4	2.55	0.06	0.07	0.02	0.57	100	100	94.44	100	77.78	0
north	78	228	5	5.85	2.54	0.07	0.12	0.04	0.55	100	100	100	100	5.56	8.33
powder	78	252	6	6.46	2.58	0.08	0.06	0.01	0.56	100	61.11	91.67	77.78	38.89	0
stony	112	824	4	14.71	2.35	0.13	0.07	0.02	0.51	100	100	86.11	100	16.67	8.33
sutton au	80	331	6	8.28	2.59	0.1	0.03	0.01	0.55	100	100	100	94.44	25	0
sutton sp	74	388	5	10.49	2.39	0.14	0.02	0	0.51	100	100	100	100	0	8.33
sutton su	86	417	5	9.7	2.34	0.11	0.02	0	0.51	100	58.33	94.44	66.67	16.67	0
troy	76	170	6	4.47	2.87	0.06	0.05	0.03	0.6	100	100	91.67	94.44	77.78	11.11
ven	65	184	5	5.66	2.57	0.09	0.06	0.03	0.56	94.44	100	100	100	41.67	0