Visit May 23, 2:30 p.m. cloudy, 16°C, 8 mph SW wind.

Recent heavy rain previous week, dry underfoot.

Butterfly transect carried out for Colin Conroy.

Samples collected

  1. NOT [Between bank & centre weeds in main pond (open water) ]
  2. Adjacent to weir in main pond within new typha angustifolia
  3. Downstream from pond, above first "weir"
  4. NOT [Hedge pond = now a patch of mud with no water]
  5. NOT [Pond at northern extreme of site]

 

1

2

3

4

5

PH

 

8.3

8.7

 

 8.7

Nitrates

 

 

 

 

 

Nitrites

 

 

 

 

 

Clarity

 

    

 

 

Mayfly

 

No

No

 

 

Shrimp

 

Yes

 

 

 

Water louse

 

Yes

 

 

 

Blood worm

 

Yes, & pupa

Yes

 

 

Gnat/mosquito

 

 

 

 

 

Rat-tailed maggot

 

 

 

 

 

 

 

 

 

 

 

Fe

 

 

 

 

 

Dissolved Oxygen mg/l

 

2.5

6.5

 

 

 

 

Cyclops m/f

Cyclops m/f

 

 

 

 

Water mites

 

 

 

 

 

Daphnia

Daphnia

 

 

 

 

Green Hydra chlorohydra

 

 

 

 

 

 Midge larva, & pupa

 

 

 

 

 

  

Lumbriculus worms in mud tubes

 

 

 

 

 Water boatman

 

 

 

 

 

 

 

 

 

Water quality

 

fair

Fair 

dry