Open Access
Table 1
Descriptive statistics of the food webs (total number) and the δ13C and δ15N values (mean, standard deviation, minimum and maximum) of freshwater fish contained in IsoFresh database for each geographical region.
| Region | Food webs | δ13C (‰) | δ15N (‰) | ||||||
|---|---|---|---|---|---|---|---|---|---|
| n | Mean | SD | Min | Max | Mean | SD | Min | Max | |
| Africa | 74 | ‒21.7 | 1.8 | ‒24.7 | ‒18.5 | 10.1 | 1.3 | 8.1 | 12.0 |
| Asia | 108 | ‒25.3 | 1.8 | ‒27.8 | ‒22.9 | 11.2 | 1.4 | 9.3 | 13.1 |
| Europe | 219 | ‒26.5 | 1.6 | ‒28.5 | ‒24.6 | 11.0 | 1.2 | 9.5 | 12.4 |
| North America | 291 | ‒25.1 | 1.5 | ‒27.2 | ‒23.1 | 10.4 | 1.3 | 8.7 | 12.1 |
| Oceania | 178 | ‒25.6 | 1.8 | ‒28.0 | ‒23.3 | 9.4 | 1.0 | 8.1 | 10.7 |
| South America | 131 | ‒26.6 | 2.1 | ‒30.1 | ‒23.4 | 9.9 | 1.4 | 7.7 | 12.1 |
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