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: Contributions to the ecology of Spitsbergen and Bear Island Citation: J. EcoL 11:214-286 (1923). Prior number: Cohen (1978) 15 Year: 1978 # of species 28 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 26 27 28 1 -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 0 0 0 2 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -1 -1 3 0 0 -1 0 0 -1 -1 -1 -1 0 -1 -1 -1 -1 0 0 0 0 0 0 0 0 0 0 0 -1 0 0 4 0 0 0 -1 0 0 0 0 0 -1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -1 -1 0 5 0 -1 0 0 -1 0 0 0 0 0 0 0 0 0 0 0 0 -1 0 0 0 0 0 0 0 -1 -1 -1 6 0 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 0 0 7 0 0 1 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 8 0 0 1 0 0 0 0 0 0 0 1 1 1 0 0 1 0 0 0 0 0 -1 0 0 0 1 0 0 9 0 0 1 0 0 0 0 0 0 0 1 1 1 1 0 1 0 0 0 0 0 -1 0 0 0 0 0 1 10 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -1 0 11 0 0 1 0 0 0 0 -1 -1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 12 0 0 1 0 0 0 0 -1 -1 0 0 0 0 0 0 -1 0 0 0 0 0 0 0 0 0 0 0 0 13 0 0 1 0 0 0 0 -1 -1 0 0 0 0 0 0 -1 0 0 0 0 0 0 0 0 0 0 0 0 14 0 0 1 0 0 0 0 0 -1 0 0 0 0 0 0 -1 0 0 0 0 0 0 0 0 0 0 0 0 15 0 0 0 0 0 0 -1 0 0 0 0 0 0 0 -1 0 0 0 0 0 0 0 0 0 0 -1 -1 -1 16 0 0 0 0 0 0 0 -1 -1 0 0 1 1 1 0 0 0 0 0 0 0 0 0 0 0 1 0 0 17 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 18 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -1 -1 -1 19 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 1 1 0 20 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -1 1 0 0 0 0 0 21 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -1 0 0 -1 1 0 0 1 1 0 22 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 0 0 0 23 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -1 -1 0 -1 -1 0 0 0 0 24 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 -1 0 0 0 25 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 26 0 0 1 1 1 0 0 -1 0 0 0 0 0 0 1 -1 0 1 -1 0 -1 0 0 0 0 0 0 0 27 0 1 0 1 1 0 0 0 0 1 0 0 0 0 1 0 0 1 -1 0 -1 0 0 0 0 0 0 0 28 0 1 0 0 1 0 0 0 -1 0 0 0 0 0 1 0 0 1 0 0 0 0 0 0 0 0 0 0 Species# Species 1 bacteria 2 protozoa (fresh water plankton) 3 plants, dead plants 4 algae ( fresh water bottom and littoral) 5 algae (fresh water plankton) 6 worms 7 geese 8 snow bunting, ptarmigan 9 purple sandpiper 10 protozoa (fresh water bottom and littoral) 11 Hymenoptera 12 mites 13 Diptera (adult) 14 Collembola 15 moss 16 spiders 17 protozoa (land) 18 Entomostraca, Rotifera (fresh water plankton) 19 Skua, glaucous gull 20 kittwake, guillemots, fulma petrel, little auk, puffin 21 northern eider, long-tailed duck, red-throated div 22 arctic fox 23 marine animals 24 seals 25 polar bear 26 Diptera (immature) 27 Entomostraca, Rotifera, Tardigrada, Oligochaeta, Nematoda (fresh water bottom and littoral) 28 Lepidurus