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. 2008 Aug 12;275(1652):2707–2714. doi: 10.1098/rspb.2008.0875

Table 1.

Diversity effects of the particular mixed-species parasitic castrator assemblages on parasite standing stock and impact on resources (host snail tissue) for the various encountered trematode species-pair combinations and details of spatial resource use.

mixed-species assemblagea n proportional change ofb spatial complementarityc
standing-stock mass compared with impact on resource compared with tissue sitesd
average sp. largest sp. average sp. largest sp. sp. 1 sp. 2 mixed
ACAN–AUST 1 −0.019 −0.077 −0.007 −0.017 g g+dg+bvm g+dg+bvm 0.67
ACAN–LGXI 1 0.378 0.314 0.067 0.065 g g+dg g+dg 0.50
AUST–EUHA 2 0.059 −0.040 −0.001 −0.009 g+dg+bvm g g+dg+bvm 0.67
AUST–HIMA 4 0.110 0.129 0.027 0.023 g+dg+bvm g g+dg+bvm 0.67
AUST–HIMB 3 −0.017 −0.011 −0.029 −0.055 g+dg+bvm g+bvm g+dg+bvm 0.33
AUST–PROB 1 0.282 −0.025 0.087 −0.074 g+dg+bvm g+dg+bvm g+dg+bvm 0.00
AUST–STIC 2 0.783 0.569 0.212 0.192 g+dg+bvm g g+dg+bvm 0.67
CATA–LGXI 1 0.635 0.453 0.164 0.147 m g+dg m+g+d 1.00
EUHA–SMCY 1 0.419 0.288 0.065 0.044 g g+dg+bvm g+dg+bvm 0.67
HIMA–LGXI 1 0.275 0.164 0.059 0.044 g g+dg g+dg 0.50
HIMA–PROB 1 −0.078 −0.307 −0.051 −0.230 g g+dg+bvm g+dg+bvm 0.67
HIMB–PROB 3 0.219 −0.077 0.049 −0.086 g+bvm g+dg+bvm g+dg+bvm 0.33
HIMB–RENB 1 0.950 0.566 0.140 0.093 g+bvm m m+g+bvm 1.00
PARO–PROB 1 −0.211 −0.377 −0.124 −0.281 g+bvm g+dg+bvm g+dg+bvm 0.33
PROB–SMCY 1 0.263 −0.150 0.122 −0.069 g+dg+bvm g+dg+bvm g+dg+bvm 0.00
RENB–SMCY 1 1.082 0.982 0.133 0.131 m g+dg+bvm m+g+dg+bvm 1.00
SMCY–SMMI 1 0.842 0.413 0.187 0.129 g+dg+bvm g g+dg+bvm 0.67
sum or mean 26 0.351 0.165 0.065 0.003
mean without PROBe 0.458 0.312 0.085 0.065
a

Species codes: ACAN, Acanthoparyphium spinulosum; AUST, Austrobilharzia sp.; CATA, Catatropis johnstoni; EUHA, Euhaplorchis californiensis; HIMA, Himasthla rhigedana; HIMB, Himasthla sp. B; LGXI, large xiphiocercaria; PARO, Parorchis acanthus; PROB, Probolocoryphe uca; RENB, Renicola buchanani; SMCY, small cyathocotylid; SMMI, small microphallid; STIC, Stictodora hancocki.

b

Effects of mixed-species assemblages are expressed relative to the effects characterizing their particular constituent species when in single-species assemblages (the average of their constituents and to the single constituent with the largest effect). The absolute values for mixed- and single-species assemblages were least-squares means from general linear models (tables 2 and 3).

c

Spatial niche complementarity=(no. of tissues not shared by the constituent species)/(total no. of tissues used by the constituent species).

d

g, gonad; dg, digestive gland; bvm, basal visceral mass; m, mantle; tissue use from (Hechinger et al. 2008).

e

PROB is the outlier species (by far the largest when alone, yet the most competitively inferior) excluded for these calculations.