Ecological Archives E088-012-A1

Birte Matthiessen, Lars Gamfeldt, Per R. Jonsson, and Helmut Hillebrand. 2007. Effects of grazer richness and composition on algal biomass in a closed and open marine system. Ecology 88:178–187.

Appendix A. A table presenting the number of animals from each species that were included in each of the 12 species compositions used in the experiment, for both the closed and open treatments, for one local pool, and a table showing the mean dry mass for one specimen of each species.

TABLE A1. The number of animals from each species that were included in each of the 12 species compositions used in the experiment, for both the closed and open treatments, for one local pool (0.14 m-2 ). The numbers are standardized for the dry mass of 100 L. littorea m-2 and for 50 L. littorea m-2. The biomass was held constant across treatments so that biomasses for each species were divided by three (in the three-species mixtures) and six (in the six-species mixture). The abbreviations A–F are Palaemon (A), L. littorea (B), Idotea (C), L. saxatilis(D), Gammarus (E) and L. fabalis (F).

Closed/open Composition Palaemon L. littorea Idotea L. saxatilis Gammarus L. fabalis
closed
A
6
0
0
0
0
0
closed
B
0
21
0
0
0
0
closed
C
0
0
25
0
0
0
closed
D
0
0
0
22
0
0
closed
E
0
0
0
0
32
0
closed
F
0
0
0
0
0
30
closed
ABC
2
7
8
0
0
0
closed
DEF
0
0
0
7
11
10
closed
ABD
2
7
0
7
0
0
closed
CEF
0
0
8
0
11
10
closed
ABCDF
1
3
4
4
5
5
closed
Zero
0
0
0
0
0
0
               
open
A
6
0
0
0
0
0
open
B
0
21
0
0
0
0
open
C
0
0
25
0
0
0
open
D
0
0
0
22
0
0
open
E
0
0
0
0
32
0
open
F
0
0
0
0
0
30
open
ABC
2
7
8
0
0
0
open
DEF
0
0
0
7
11
10
open
ABD
2
7
0
7
0
0
open
CEF
0
0
8
0
11
10
open
ABCDF
1
3
4
4
5
5
open
Zero
0
0
0
0
0
0
               
regional pools (per tub)
ABCDF
12
38
46
40
59
55

TABLE A2. Mean dry mass (in g) based on ten specimens for each species.
Species   Dry mass (g)
Gammarus   0.01365
Idotea   0.017585
L. fabalis   0.02905
L. saxatilis   0.0409
L. littorea   0.04278
Palaemon   0.069185

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