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: The marine communities of a tidal inlet at Cape Ann, Massachusetts: a study in bio-ecology Citation: Ecol. Monogr. 17:263-294 (1947) Year: 1947 # 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 0 0 -1 -1 -1 -1 -1 0 0 0 0 0 -1 0 0 0 0 0 0 0 0 0 0 2 0 -1 0 0 0 0 0 0 0 -1 0 0 0 0 0 0 -1 0 0 0 0 0 0 0 0 3 0 0 -1 0 0 0 0 0 0 -1 -1 -1 0 0 0 0 0 0 0 0 0 0 0 0 0 4 0 0 0 -1 0 0 0 0 0 0 0 0 -1 -1 0 0 0 0 0 0 0 0 0 0 0 5 1 0 0 0 0 0 0 0 0 0 0 0 0 0 -1 -1 0 0 0 -1 0 -1 0 0 -1 6 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -1 0 0 0 0 0 -1 0 0 7 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -1 -1 0 0 -1 0 -1 0 0 8 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -1 0 0 0 0 0 -1 0 0 9 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -1 0 0 0 0 0 0 0 0 10 0 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -1 -1 0 0 11 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -1 0 0 0 0 -1 0 0 12 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -1 0 0 13 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -1 -1 0 0 14 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -1 0 0 0 -1 0 0 15 1 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -1 0 -1 0 16 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -1 0 -1 0 0 0 17 0 1 0 0 0 1 1 1 1 0 0 0 0 0 0 0 0 0 0 0 0 0 -1 0 0 18 0 0 0 0 0 0 1 0 0 0 1 0 0 0 0 0 0 0 0 0 -1 0 -1 0 0 19 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 20 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 21 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 1 0 0 0 -1 0 0 0 22 0 0 0 0 1 0 0 0 0 1 0 0 1 0 1 1 0 0 0 0 1 0 0 -1 0 23 0 0 0 0 0 1 1 1 0 1 1 1 1 1 0 0 1 1 0 0 0 0 0 0 -1 24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 1 0 0 0 25 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 Species# Species 1 plankton and detritus 2 organic debris 3 macroalgae 4 organic matter in mud 5 Fundulus, fish fry 6 Chalina 7 Mytilus, Gemma 8 Abietinaria, Sertularia, Metridium 9 Lichenophora 10 isopods, Gammarus, Caprella 11 Littorina littorea 12 Strongylocentrotus 13 Crago 14 annelids 15 Scomber, Clupea 16 Loligo 17 Pagurus, Cancer 18 Polinices 19 Limulus 20 Raja 21 Asterias 22 Pomatomus, Poronatus 23 Myoxocephalus 24 Phoca 25 Sterna