Teenage boy and girl high school students picking invertebrates out of a kick-seine net for a study of stream water quality. Macroinvertebrates are strong indicators of the quality of bodies of water. The types of invertebrates found in the stream reflects the quality of the water | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Shields, Martin |
Bildgröße: | 3707 px × 3300 px |
Modell-Rechte: | vorhanden |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: |
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