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: Arctic and subarctic marine ecology: immediate problems Citation: Arctic 7:213-228 (1954) Year: 1954 # 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 -1 -1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 0 -1 0 0 -1 -1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 3 1 0 0 0 0 0 -1 -1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 4 1 0 0 0 0 0 0 0 -1 -1 -1 -1 0 0 0 0 0 -1 -1 -1 0 0 5 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 6 0 1 0 0 0 0 0 0 0 0 0 0 -1 -1 -1 -1 -1 0 0 0 0 -1 7 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 8 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 9 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 10 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 11 0 0 0 1 0 0 0 0 0 0 0 -1 0 0 0 0 0 -1 -1 0 0 0 12 0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 -1 -1 13 0 0 0 0 0 1 0 0 0 0 0 0 0 -1 -1 0 0 0 0 0 -1 -1 14 0 0 0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 15 0 0 0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 16 0 0 0 0 0 1 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 1 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 -1 -1 19 0 0 0 1 0 0 0 0 0 0 1 0 0 0 0 0 0 0 0 0 -1 -1 20 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 -1 -1 21 0 0 0 0 0 0 0 0 0 0 0 1 1 0 0 0 0 1 1 1 0 0 22 0 0 0 0 0 1 0 0 0 0 0 1 1 0 0 0 0 1 1 1 0 0 Species# Species 1 phytoplankton 2 detritus 3 smaller zooplankton 4 larger zooplankton 5 bacteria 6 benthonic invertebrates 7 right whales 8 clupeid fishes 9 rorquals 10 arctic char 11 caplin 12 cod 13 benthonic vertebrates 14 bearded seals 15 berluga 16 narwhal 17 walrus 18 harp seal 19 harbour seal 20 ringed seal 21 killer whale 22 Greenland shark