22.05.2020

Sampling

• 

  M1 site - oligorheic stream tributary

• 

  M1, M2 and M3 - Confluence of Menne tributaries

• 

  M4 - Downstream oligorheic site

• 

  M5 - Hyporheic site downstream of Menne

• 

  M6 = M3b - Arheic site in the middling Menne

Sampling spots

Sampling sites	Latitude	Longitude
M1	51.589308 N	8.755923 E
M2	51.589975 N	8.754721 E
M3	51.590694 N	8.754786 E
M4	51.597248 N	8.760392 E
M5	51.602579 N	8.760392 E
M6 = M3b	51.5909370 N	8.7549049 E

Hydrology

Hyperrheic: /
Eurheic: /
Oligorheic: M1, M2, M3
Arheic: M4, M6 = M3b
Hyprheic: M5

Physicochemical composition

Sampling site	Q [l/s]	Conductivity [mS/cm]	pH	Temp [°C]	Comments
M1	0,1	0,600	8,07	12,0	humic, salamanders
M2	0,1	0,554	8,08	12,6	fine sediment
M3	0,06	0,543	8,14	12,6	small cobbles
M4	0,01	0,425	7,9	13	wet, no apparent current
M5	/	/	/	/	dry
M6 = M3b	0,02	0,54	8,22	13	tadpoles

Diatom survival

Smaller + narrower diatoms dead, wider = resistant

Sampling sites	Dead [%]	Alive [%]	Resistant [%]	Lipid increase	Other algae	Zoological	Diatom species	Comments
M1	32.3	54.8	12.9	/	/	Paramecia can have eaten most diatoms and Salamander tadpoles	/	Top down regulation? / Too little diatoms (n = 31)
M2	18.3	57.2	24.5	3.7	/	/	Nitzschia acicularis, Gomphonematal	Arbuscular diatoms
M3	16.7	69.6	13.7	3.5	/	Rotifera & Paramecia	/	Teratologies
M4	14.7	69.8	15.5	1.6	Chlorococcal, Euglena, Closterium, Synura	Paramecium	Rhoicosphenia abbreviata	/
M5	27,1	/	72,9	/	Cyanobacteria (Oscillatorials, Coccal)	Mycohyphae	/	/
M6 = M3b	8.1	73.9	18	11.9	Cyanobacteria (Oscillatorials,...), Chlorophyta (Mougeotia)	Tadpoles	Amphora pediculus, Encyonema ventricosum, Nitzschia microcephala	Teratologies

Diatom composition