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: Radionuclide tracer analysis of trophic relationships in an old-field ecosystem Citation: Ecol. Monogr. 43:1-19 (1973). Year: 1973 # of species 22 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 1 -1 0 0 0 -1 -1 -1 -1 -1 0 0 0 0 0 0 0 0 0 0 0 0 0 2 0 -1 0 0 0 0 -1 -1 -1 -1 -1 -1 -1 -1 -1 0 0 0 0 0 0 0 3 0 0 -1 0 0 0 -1 0 0 0 0 0 -1 -1 -1 0 0 0 0 0 0 0 4 0 0 0 -1 0 0 0 0 0 0 0 0 0 -1 0 -1 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 0 0 0 0 6 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -1 -1 0 0 0 0 7 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -1 -1 -1 0 0 8 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -1 -1 -1 0 0 9 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -1 -1 -1 0 10 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -1 -1 -1 0 11 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -1 -1 0 12 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -1 13 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -1 14 0 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 15 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 16 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 17 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 18 0 0 0 0 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 19 0 0 0 0 0 0 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 20 0 0 0 0 0 0 1 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 21 0 0 0 0 0 0 0 0 1 1 1 0 0 0 0 0 0 0 0 0 0 0 22 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 Species# Species 1 raphanus (wild radish) 2 ambrosia (ragweed) 3 radish debris 4 ragweed debris 5 macrosteles, phyllotreta chalbeipennis 6 hyadaphis, myzus 7 melanoplus 8 lepidoptera larvae 9 lygus 10 empoasca, oecanthus 11 philaenus, scaphytopius, reuteroscopus 12 chlamydatus, plagiognathus, smicronyx 13 trigonorhinus 14 nemobius 15 cryllus 16 isopods, millipeds 17 chauliognathus, coccinella 18 harpalus 19 nabis 20 web spiders 21 ground spiders 22 coleomegilla, sinea