Electronic Supplementary Material for:
What drives community dynamics?
Crispin M. Mutshinda*, Robert B. O’Hara, and Ian P. Woiwod
*
Author for correspondence: crispin.mutshindamwanza@helsinki.fi
Description of Data
The scientific names (short-hand in brackets) and common names of the species involved
in the study, species’ taxa, sampling periods as well as mean population densities and
standard deviations are given in Table S1. It should be noted that one of the moths
Mesapamea secalis is in fact a two species complex (secalis/didyma). These two species
can only be separated on genitalia and were not recognized as separate when the
sampling started so we have kept the taxa as one for consistency.
All datasets are available to scientists upon request. We refer to Rothamsted
Research at URL http://www.rothamsted.ac.uk/ for the moth data. The Hinkley fish and
crustacean
data
can
be
obtained
from
Pisces
Conservation
Ltd
at
URL
www.irchouse.demon.co.uk, the rodent data from Sevilleta Long Term Reseach Project
at URL http://sevilleta.unm.edu/data/, and the bird data from Hubbard Brook Ecosystem
Study at URL www.bubbardbrook.org/ .
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Scientific Name
Common Name
Agrostis exclamationis (Agrexl)
Diarsia mendica (Diamen)
Xestia xanthographa(Xesxan)
Noctua pronuba(Nocpro)
Orthosia gothica (Ortgot)
Hoplodrina alsines(Hopals)
Mesapamea secalis (Messec)
Cosmia trapezina (Costrap)
Agrochola macilenta(Agrimac)
Conistra vacinii (Convac)
Hypena proboscidalis(Hypprob)
Hermina grisealis (Hergri)
Limanda limanda (Limlim)
Liparis liparis (Liplip)
Merlangius merlangus (Merner)
Platichthys flesus (Plafle)
Pomatoschistus minutus (pommin)
Solea solea (solsol)
Sprattus sprattus (Spraspra)
Trisopterus luscus (Trilus)
Trisopterus minutes (Trimin)
Liocarcinus holsatus (Liohol)
Carcinus maenas (Carmae)
Cancer pagarus (Canpag)
Palaemon serratus (Palser)
Pandalus montagui (Penmon)
Crangon crangon (Cracra)
Paciphaea sivado (pacsiv)
Setophaga ruticilla (Setrut)
Empidonax minimus (Empmin)
Vireo olivaceus (Viroli)
Dendroica caerulescens (Dencae)
Seiurus aurocapillus (Seiaur)
Dipodomys ordii(Dipord)
Dipodomys spectabilis (Dipspe)
Perognathus flavus(Perfla)
Heart & Dart
Ingrailed Clay
Square-spot Rustic
Large Yellow Underwing
Hebrew Character
The Uncertain
Common Rustic
The Dun-bar
Yellow-line Quaker
The Chestnut
The Snout
Small Fan-foot
Dab
Sea snail, Common
Whiting
Flounder
Goby Sand
Sole (Dover sole)
Sprat
Pout
Poor cod
Swimming Crab
Shore Crab
Edible crab
Pawn
Pink Shrimp
Grey Shrimp
Crust6
American redstart
Least flycatcher
Red-eyed vireo
Black-throated blue warbler
Ovenbird
Ord’s Kangaroo rat
Bannertail Kangaroo rat
Silk pocket mouse
Taxa (Sampling
Period)
Moths (1964-2003)
Fish (1981-2001)
Crustaceans
(1981-2001)
Birds (1969-1984)
Rodents (1989-2003)
Mean population
Density (SD)
3.73 (0.93)
4.58 (0.63)
4.58 (0.55)
5.20 (0.62)
4.19 (0.39)
4.01 (0.85)
4.26 (0.85)
4.23 (0.81)
4.54 (0.85)
4.02 (0.75)
4.28 (0.92)
4.26 (1.02)
3.76 (1.13)
4.48 (0.81)
7.12 (0.81)
4.34 (0.46)
5.38 (0.84)
4.63 (0.63)
7.07 (0.94)
4.18 (1.07)
4.83 (1.13)
5.57 (1.50)
3.77 (1.01)
3.98 (1.39)
6.35 (1.07)
7.21 (0.98)
9.70 (0.41)
8.40 (0.84)
3.31 (0.35)
3.11(0.22)
3.11 (0.22)
2.35 (0.26)
2.37 (0.31)
2.22 (0.82)
2.72 (0.66)
1.81 (0.90)
Table S1. Scientific names (short-hand in brackets), common names, taxa, sampling
periods as well as mean population densities (on the natural logarithmic scale) and
standard deviations for the populations involved.
2
8
0
2
4
6
Dipodomys ordii
1992
1994
1996
1998
2000
2002
2000
2002
2000
2002
2
4
6
Dipodomys spectabilis
0
Density
8
1990
1992
1994
1996
1998
8
1990
0
2
4
6
Perognathus flavus
1990
1992
1994
1996
1998
Year
Figure S1. Error-bars (mean  1SD) of the posterior predictive distributions for the rodent data
with the observed values (open circles) plotted on top.
3
Seiaur
Environmental Forcing
Density Dependence
Species
Dencae
Viroli
Empmin
Setrut
0.0
0.2
0.4
0.6
0.8
1.0
R e l a t i v e C o n t r i b u t i o n to T e m p o r a l V a r i a t i o n
Figure S2. Error bars (posterior mean  1SD) for the proportions of temporal variation
attributable to environmental forcing (black diamonds) and to intra-specific interactions
(grey boxes) in the dynamics of individual bird species.
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Species
Environmental Forcing
Density Dependence
Sampling Error
Perfla
Dipspe
Dipord
0.0
0.2
0.4
0.6
0.8
1.0
R e l a t i v e C o n t r i b u t i o n to T e m p o r a l V a r i a t i o n
Figure S3. Error bars (posterior mean  1SD) for the proportions of temporal variation
attributable to environmental forcing (black diamonds), intraspecific interactions (grey
boxes), and sampling error (black triangles) in the dynamics of individual rodent species.
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1
1
1
1
1
1
Viroli
1
1
1
1
1
Empmin
1
1
1
1
1
1
Dencae
1
1
1
1
1
1
1
1
Setrut
1
1
1
Seiaur
-1
0
1
-1
0
1
-1
0
1
-1
0
1
-1
1
0
1
Figure S4. Posterior densities of environmental correlations for the bird data; darker
shading corresponds to a correlation with a posterior mean further from 0.
6
1
1
1
1
1
Dipspe
1
1
Dipord
1
1
1
Perfla
-1
0
1
-1
0
1
-1
1
0
1
Figure S5. Posterior densities of environmental correlations for the rodent data; darker
shading corresponds to a correlation with a posterior mean further from 0.
7