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: Ecology and natural history of a stand of giant kelp, Macrocystis pyrifera, off Del Mar, California Citation: Fish. Bull. (Dublin) 72:670-684 (1974) Year: 1974 # 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 0 -1 0 -1 -1 0 0 -1 -1 0 -1 0 0 0 0 0 0 0 2 0 -1 0 0 -1 0 0 0 -1 0 0 -1 0 0 0 0 0 0 0 0 0 3 0 0 -1 0 0 -1 -1 -1 0 0 0 0 -1 0 0 0 0 0 0 0 0 4 0 0 0 -1 0 0 -1 -1 0 0 0 0 0 0 0 0 0 0 0 0 0 5 1 1 0 0 0 0 0 0 -1 -1 -1 0 0 0 0 0 0 0 0 0 0 6 0 0 1 0 0 0 0 0 0 0 0 0 0 0 -1 0 0 -1 0 0 0 7 1 0 1 1 0 0 0 0 0 -1 0 0 0 0 -1 -1 0 0 -1 0 -1 8 1 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -1 0 0 9 0 1 0 0 1 0 0 0 0 0 0 0 0 0 -1 -1 0 -1 0 0 0 10 0 0 0 0 1 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 -1 11 1 0 0 0 1 0 0 0 0 0 0 0 0 0 -1 0 0 -1 0 -1 0 12 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -1 13 0 0 1 0 0 0 0 0 0 0 0 0 0 0 -1 0 0 -1 0 0 0 14 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -1 0 0 0 0 15 0 0 0 0 0 1 1 0 1 0 1 0 1 0 0 -1 -1 0 0 -1 0 16 0 0 0 0 0 0 1 0 1 0 0 0 0 0 1 0 0 0 0 0 -1 17 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 18 0 0 0 0 0 1 0 0 1 0 1 0 1 0 0 0 0 0 0 0 0 19 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 20 0 0 0 0 0 0 0 0 0 0 1 0 0 0 1 0 0 0 0 0 0 21 0 0 0 0 0 0 1 0 0 1 0 1 0 0 0 1 0 0 0 0 0 Species# Species 1 detritus 2 phytoplankton 3 Macrocystis pyrifera 4 Pterygophora 5 zooplankton 6 Astraea undosa 7 Strongylocentrotus purpuratus 8 Strongylocentrotus franciscanus 9 Styela monereyensis 10 Tealia coriacea 11 Parapholas californica 12 Thethya aurantia 13 diopatra ornata 14 Paguristes ulreyi 15 Kelletiea kelletii 16 Astrometis sertulifera 17 Octopus bimaculatus 18 Pisaster giganteus 19 Pimelometopon pulchrum 20 Pisaster brevispinus 21 dermasterias imbricata