In Table 6.1, the RV coefficients appear in the lower-left triangle, below the main
diagonal, while the upper-right triangle contains p-values. These results tell us that
fish communities are mostly linked to the physiographic conditions (RV ¼ 0.58),
which are themselves partly linked to water chemistry (RV ¼ 0.36).
6.11 Relating Species Traits and Environment
Niche theory predicts that species settle in environments to which their ecological
and behavioural characteristics are adapted. Functional ecology is the discipline
devoted to the study of the relationship between species traits and the environment.
-1.0
-0.5
0.0
0.5
1.0
-1.0
-0.5
0.0
0.5
1.0
Correlation circle
Dim 1 (47.70%)
Dim 2 (15.74%)
Fish community
Physiography
Water quality
Cogo
Satr
Phph Babl
Thth
Teso
Chna
Pato
Lele
Sqce
Baba
Albi
Gogo
Eslu
Pefl
Rham
Legi
Scer
Cyca
Titi
Abbr
Icme
Gyce
Ruru
Blbj
Alal
Anan
ele
slo
dis
pH
har
pho
nit
amm
oxy
bod
Cogo
Satr
Phph Babl
Thth
Teso
Chna
Pato
Lele
Sqce
Baba
Albi
Gogo
Eslu
Pefl
Rham
Legi
Scer
Cyca
Titi
Abbr
Icme
Gyce
Ruru
Blbj
Alal
Anan
ele
slo
dis
pH
har
pho
nit
amm
oxy
bod
Cogo
Satr
Phph Babl
Thth
Teso
Chna
Pato
Lele
Sqce
Baba
Albi
Gogo
Eslu
Pefl
Rham
Legi
Scer
Cyca
Titi
Abbr
Icme
Gyce
Ruru
Blbj
Alal
Anan
ele
slo
dis
pH
har
pho
nit
amm
oxy
bod
Cogo
Satr
Phph Babl
Thth
Teso
Chna
Pato
Lele
Sqce
Baba
Albi
Gogo
Eslu
Pefl
Rham
Legi
Scer
Cyca
Titi
Abbr
Icme
Gyce
Ruru
Blbj
Alal
Anan
ele
slo
dis
pH
har
pho
nit
amm
oxy
bod
Cogo
Satr
Phph Babl
Thth
Teso
Chna
Pato
Lele
Sqce
Baba
Albi
Gogo
Eslu
Pefl
Rham
Legi
Scer
Cyca
Titi
Abbr
Icme
Gyce
Ruru
Blbj
Alal
Anan
ele
slo
dis
pH
har
pho
nit
amm
oxy
bod
Cogo
Satr
Phph Babl
Thth
Teso
Chna
Pato
Lele
Sqce
Baba
Albi
Gogo
Eslu
Pefl
Rham
Legi
Scer
Cyca
Titi
Abbr
Icme
Gyce
Ruru
Blbj
Alal
Anan
ele
slo
dis
pH
har
pho
nit
amm
oxy
bod
Cogo
Satr
Phph Babl
Thth
Teso
Chna
Pato
Lele
Sqce
Baba
Albi
Gogo
Eslu
Pefl
Rham
Legi
Scer
Cyca
Titi
Abbr
Icme
Gyce
Ruru
Blbj
Alal
Anan
ele
slo
dis
pH
har
pho
nit
amm
oxy
bod
Cogo
Satr
Phph Babl
Thth
Teso
Chna
Pato
Lele
Sqce
Baba
Albi
Gogo
Eslu
Pefl
Rham
Legi
Scer
Cyca
Titi
Abbr
Icme
Gyce
Ruru
Blbj
Alal
Anan
ele
slo
dis
pH
har
pho
nit
amm
oxy
bod
Cogo
Satr
Phph Babl
Thth
Teso
Chna
Pato
Lele
Sqce
Baba
Albi
Gogo
Eslu
Pefl
Rham
Legi
Scer
Cyca
Titi
Abbr
Icme
Gyce
Ruru
Blbj
Alal
Anan
ele
slo
dis
pH
har
pho
nit
amm
oxy
bod
Fig. 6.20 Correlations between the quantitative variables of each subset on MFA axes 1 and 2
Table 6.1 RV coefficients (lower-left triangle) of the pairs of matrices involved in the MFA, and
their p-values (upper-right triangle)
Fish community
Physiography
Water quality
Fish community
1.000000
0.000002
0.000002
Physiography
0.580271
1.000000
0.002809
Water quality
0.505324
0.361901
1.000000
6.11 Relating Species Traits and Environment
287