Food Web Database

The food webs are based on published studies of various types of habitat. The original food web matrix is not a square matrix.  It contains m columns of predators and n rows of preys with a 1 at the intersection to indicate a direct feeding relation. We converted the original food web matrix into a community matrix and set a_ij = -1 and a_ji = 1 if species i feeds on species j. You can decide if a self-loop is added to each species or to the primary producer.

Web Number:
1 ,	2 ,	3 ,	4 ,	5 ,	6 ,	7 ,	8 ,	9 ,	10 ,	11 ,	12 ,	13 ,	14 ,	15 ,
16 ,	17 ,	18 ,	19 ,	20 ,	21 ,	22 ,	23 ,	24 ,	25 ,	26 ,	27 ,	28 ,	29 ,	30 ,
31 ,	32 ,	33 ,	34 ,	35 ,	36 ,	37 ,	38 ,	39 ,	40 ,	41 ,	42 ,	43 ,	44 ,	45 ,
46 ,	47 ,	48 ,	49 ,	50 ,	51 ,	52 ,	53 ,	54 ,	55 ,	56 ,	57 ,	58 ,	59 ,	60 ,
61 ,	62 ,	63 ,	64 ,	65 ,	66 ,	67 ,	68 ,	69 ,	70 ,	71 ,	72 ,	73 ,	74 ,	75 ,
76 ,	77 ,	78 ,	79 ,	80 ,	81 ,	82 ,	83 ,	84 ,	85 ,	86 ,	87 ,	88 ,	89 ,	90 ,
91 ,	92 ,	93 ,	94 ,	95 ,	96 ,	97 ,	98 ,	99 ,	100 ,	101 ,	102 ,	103 ,	104 ,	105 ,
106 ,	107 ,	108 ,	109 ,	110 ,	111 ,	112 ,	113 ,

Title: Food relationships on the intertidal sandy beaches of the Cape Peninsula Citation: S. Afr. J. Sci. 60:35-41 (1964) Year: 1964 # of species 21 Add self-loop to only primary producers Add self-loop to all species Community Matrix:   1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 1 -1 0 0 -1 -1 -1 -1 -1 0 0 0 0 0 -1 0 0 0 -1 -1 0 0 2 0 -1 0 -1 0 0 -1 0 -1 -1 -1 -1 0 0 0 -1 -1 0 0 0 0 3 0 0 -1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -1 4 1 1 0 0 0 0 0 0 0 0 0 0 0 -1 0 0 0 0 0 0 0 5 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -1 -1 0 0 6 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -1 0 0 0 7 1 1 0 0 0 0 0 0 0 0 0 0 0 0 -1 0 0 0 0 0 0 8 1 0 0 0 0 0 0 0 0 0 0 0 -1 0 -1 0 0 0 0 0 0 9 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -1 0 10 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -1 11 0 1 0 0 0 0 0 0 0 0 0 0 0 0 -1 -1 -1 0 0 0 0 12 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 13 0 0 0 0 0 0 0 1 0 0 0 0 0 0 -1 -1 0 0 0 0 0 14 1 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 -1 -1 0 0 15 0 0 0 0 0 0 1 1 0 0 1 0 1 0 0 0 0 0 0 0 0 16 0 1 0 0 0 0 0 0 0 0 1 0 1 0 0 0 0 0 0 0 0 17 0 1 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 -1 0 18 1 0 0 0 1 1 0 0 0 0 0 0 0 1 0 0 0 0 0 0 -1 19 1 0 0 0 1 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 20 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 0 0 0 0 21 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 0 0 0 Species# Species 1 detritus 2 organic macrodebris 3 Gastrosaccus, Callianassa, Donax 4 bacteria 5 Cumacea 6 Turbellaria 7 Nemertea 8 Bathyporeia 9 Bullia 10 Talorchestia 11 errant polychaeta 12 Larus 13 isopods 14 protozoa 15 Curlew sandpiper 16 Sanderling 17 Ovalipes 18 sedentary polychaeta 19 nematode worms 20 elasmobranch fishes 21 predatory fishes