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: Ecological aspects of a California marine estuary Citation: Am. Midi. Nat. 16:629-765 (1935). Year: 1935 # of species 25 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 22 23 24 25 1 -1 0 -1 -1 0 -1 0 0 -1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 0 -1 -1 0 -1 -1 -1 -1 -1 -1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 3 1 1 0 -1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 4 1 0 1 0 0 0 0 0 0 0 0 -1 0 0 0 0 0 0 0 0 0 0 0 0 0 5 0 1 0 0 0 0 0 0 0 0 0 -1 0 0 0 0 0 0 0 0 0 0 0 0 0 6 1 1 0 0 0 0 0 0 0 0 0 0 0 -1 0 0 0 0 0 0 0 -1 -1 -1 0 7 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 8 0 1 0 0 0 0 0 0 0 0 0 -1 0 -1 0 0 0 0 0 0 0 0 0 0 0 9 1 1 0 0 0 0 0 0 0 0 0 0 -1 -1 0 0 0 0 0 0 0 0 0 -1 -1 10 0 1 0 0 0 0 0 0 0 0 0 0 -1 0 -1 -1 0 0 0 0 0 0 0 0 0 11 0 0 0 0 0 0 0 0 0 0 -1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 12 0 0 0 1 1 0 0 1 0 0 0 0 0 0 1 0 -1 -1 0 0 0 0 0 0 0 13 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 14 0 0 0 0 0 1 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -1 15 0 0 0 0 0 0 0 0 0 1 0 -1 0 0 0 0 0 -1 -1 0 0 0 0 0 0 16 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 17 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 -1 -1 18 0 0 0 0 0 0 0 0 0 0 0 1 0 0 1 0 0 0 0 0 -1 -1 -1 0 -1 19 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 -1 0 0 0 -1 20 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -1 0 0 0 0 0 21 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 22 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 -1 23 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 24 0 0 0 0 0 1 0 0 1 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 25 0 0 0 0 0 0 0 0 1 0 0 0 0 1 0 0 1 1 1 0 0 1 0 0 0 Species# Species 1 primary producers 2 detritus 3 protozoa 4 crustacea 5 Cailianassa 6 shore crabs 7 Phoronopsis 8 Urechis 9 clams 10 Lumbrinereis, Notomastus 11 heron 12 Clevelandia 13 wading birds 14 stingray 15 Nereis, Clycera 16 nmereteans 17 terns, shorebirds 18 cabezon 19 flounder 20 Cerebratulus 21 loon, cormorant 22 striped bass 23 scoter 24 gulls 25 man