Sighting 3344025
Silkweed (A freshwater algae) at Bonython, ACT
Identification history
| Zygnemaceae (family) | 19 Jul 2016 | MichaelMulvaney | ||
| Zygnemaceae (family) | 6 Jul 2016 | MichaelBedingfield | ||
| Unidentified | 1 Jul 2016 | MichaelBedingfield |
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User's notes
Found in the Murrumbidgee River, common at times. The photo shows some algae caught in a small whirlpool.
7 comments
Heino
wrote:
1 Jul 2016
I'll pass. The only alga I can recognize (to genus) is the red brown terrestrial Trentepohlia!
Mike
wrote:
6 Jul 2016
My Waterwatch Algal Identification Flow Chart gives free floating, silky and green is Zygnemaceae but maybe you need to find an expert.
MichaelBedingfield
wrote:
6 Jul 2016
Thanks Mike. I presume it is local since it is on your Waterwatch list so I've added it as a "species" and suggested it.
Heino
wrote:
6 Jul 2016
I'll have to leave any algae for you to confirm. It was sensible to separate out the Other cryptogams group but I can't call myself an expert. I can recognize one algal genus, one cyanobacterial genus and (visually) the odd myxomycete.
MichaelMulvaney
wrote:
20 Jul 2016
Stephen Skinner a freshwater plant specialist at the NSW Herbarium said the following: "One is very brave to identify, beyond family, freshwater algae from photographs... (this) photo, of the swirl of silkweed belongs to the family Zygnemaceae. Without microscopic, or at minimum hand lens, examination you cannot even get to genus. With a specimen, we could take it to genus, and if fertile, to species possibly...there is a paper in Telopea on the southern Tablelands ones...have you a decent research microscope handy?....
If the citizen scientists using this website would like their findings identified by us, we are more than happy to oblige. Specimens should be placed in a slip-lock plastic bag, have excess water gently poured off, and a small amount of methylated spirit added (after draining). The bag, and a note with the locality, date of collection, collector's names, habitat (wetland form or waterway form) and GPS, and any other notes they like, should be then sent, Express Post, to:
Plant Identification Service, National Herbarium of New South Wales, Royal Botanic Gardens Sydney, Mrs Macquarie's Rd, Sydney 2000,
and marked Attention : Dr Stephen Skinner. There is no fee for the general public
If the citizen scientists using this website would like their findings identified by us, we are more than happy to oblige. Specimens should be placed in a slip-lock plastic bag, have excess water gently poured off, and a small amount of methylated spirit added (after draining). The bag, and a note with the locality, date of collection, collector's names, habitat (wetland form or waterway form) and GPS, and any other notes they like, should be then sent, Express Post, to:
Plant Identification Service, National Herbarium of New South Wales, Royal Botanic Gardens Sydney, Mrs Macquarie's Rd, Sydney 2000,
and marked Attention : Dr Stephen Skinner. There is no fee for the general public
Mike
wrote:
20 Jul 2016
Stephen Skinner's Teach Yourself: Conspicuous Algal Growth in Waterways is online at http://www.act.waterwatch.org.au/Water%20Plants.html and contains the identification flow chart I mentioned earlier or if you just want the chart it is http://www.act.waterwatch.org.au/Files/Library/newflowchart.pdf.
Location information
- Coordinates 149.070606-35.436233
- Altitude 572.2m
- Maps Pine Island to Point Hut
- Places Bonython, ACT
Sighting information
- 16 - 100 Abundance
- 26 Mar 2015 06:51 PM Recorded on
- MichaelBedingfield Recorded by
-
Collections
Algae, Cyanobacteria, other bacteria and viruses
Species information
- Zygnemaceae (family) Scientific name
- Silkweed (A freshwater algae) Common name
- Not Sensitive
- Local native
- Non-invasive or negligible
- 572.2m to 691.5m Recorded at altitude
- Machine learning
- External link More information
