Table 2 Layman metrics for all species and the assumed present T. tinca, Gyrinus sp., and A. anguilla as well as the community with and without them.

From: Using stable isotopes to analyse extinction risks and reintroduction opportunities of native species in invaded ecosystems

Species

Trophic position

Nitrogen range [δ15N]

Carbon range [δ13C]

Total hill area

CD

NND

SDNND

SEAc

SEAb

Communities

Community****

–

9.6

12.3

53.78

3.19

0.43

0.35

–

 

Community_T*

–

14.6

12.3

53.78

2.52

0.34

0.31

–

 

Community_G**

–

14.1

12.3

104.41

4.65

0.46

0.39

–

 

Community_A***

–

14.1

12.3

106.08

4.07

0.36

0.32

–

 

Non-native species

M. salmoides

4.0

2.3

2.2

2.50

0.91

0.31

0.17

1.25

7.49

L. gibbosus

3.5

3.8

3.3

4.95

1.19

0.48

0.43

2.23

13.35

C. carpio

3.1

2.9

3.6

5.1

1.04

0.54

0.49

2.42

14.52

P. clarkii

2.3

4.8

8.3

16.15

3.07

0.63

0.41

10.17

60.95

P. australis

Baseline

1.0

1.4

0.11

0.56

0.33

0.17

0.14

0.84

Native species

T. tinca

3.4

1.5

3.1

2.98

0.82

0.22

0.20

3.85

23.08

Gyrinus sp.

2.1

2.3

7.2

9.44

1.50

0.57

0.49

0.89

5.33

A. anguilla

3.8

3.1

3.3

7.50

1.03

0.25

0.17

1.98

11.88

  1. CD mean distance to centroid, NND mean nearest neighbour distance, SDNND standard deviation of the nearest neighbour distance, SEAc corrected Standard Ellipse Area considering 40 % data coverage, SEAb corrected Standard Ellipse Area considering 95 % data coverage.
  2. *Under consideration of T. tinca being present in Arreo Lake.
  3. **Under consideration of Gyrinus sp. being present in Arreo Lake.
  4. ***Under consideration of A. anguilla being present in Arreo Lake.
  5. ****Under consideration of neither T. tinca nor Gyrinus sp. being present in Arreo Lake.
Back to article page