19 Questions 124 Answers 0 Followers
Questions related from Maria Verdugo Althöfer
Filamentous algae, unbranched, from a river, like tufts of hair, 50 micras diameter I have some doubts because i dont see the distinctive rings from Oedogonium and for Rhizoclonium the cells are...
01 December 2020 5,853 10 View
I need to differentiate living veligers from dead. Is there some staining or another method? Thank you for your help in advance MAria
17 October 2019 6,436 7 View
I found a bloom of cyanobacteria with filaments that look like Sphaerospermopsis aphanizomenoides if you see the dispositions Heterocyte_AKinete_Heterocyte and others features but i found some...
14 October 2019 5,605 5 View
This year some of my cyanobacteria blooms, in reservoirs, are"yellow" and when you show them under the microscope they look more "yellow" than usually. (it is true that there are also diatoms in...
03 August 2018 3,693 28 View
Lowland mid-sized stream 300m altitude. FIXED WITH ETANOL It forms macroscopic colonies consisting of cell groups enclosed within mother cell wall in a mucilaginous envelope. Cells with a single...
05 April 2018 837 8 View
THe sample is a lake with 23725 µS/cm conductivity pH 8,85 alcalinity 178,20 mg CaCO3/L FIXED WITH LUGOL size more or less 28 x 15 microns i think that perhaps could be a raphydophyceae (...
13 July 2017 7,281 12 View
Samples FIXED WITH LUGOL from an Artificial Pond (7,7 Hm3, 300 ha) 4,5m depth Thank you I have attached a new photo: it is an exemplar eating a filament of cyanobacteria Maria
17 February 2017 4,645 6 View
They are from a TEMPORARY STREAM from south Spain. Fixed by ETHANOL Colonies size 5 a 10mm, mucilaginous colonies floating through Rannunculus vegetation Cell size around 9-10micras. distributed...
14 February 2017 6,392 15 View
I found these filaments of cyanobacteria in some shallow lakes. SAMPLES FIXED WITH LUGOL first is a Nostocaceae, but i am not sure about de genera-species beaucause i haven´t found acinetes...
24 January 2017 821 13 View
Hi people! The sampleI (FIXED WITH LUGOL) is from a temporary lagoon (only 9 cm depht) with high salinity Conductivity: 172022 μS/cm pH 6,86 dissov oxig: 2,49mg/l I am asking about the Volvocales...
02 August 2016 9,967 11 View
They are living (M1, M2 and M3) and also lugol-fixed (M4 and M5) and belongs to a reservoir. Thanks in advance
10 June 2016 5,805 24 View
It is fixed with lugol. And it is a reservoir sample Thanks Maria
07 June 2016 8,378 11 View
Sample of a small artificial urban pond. All the surface of the pond with a scum of Euglena. After a climate change (temperature drop and windy) Cells 110-117 long x 31 wide. Chloroplasts...
19 January 2016 7,293 12 View
From a reservoir. Sample fixed wiht lugol, Thanks in advance
26 November 2015 4,165 9 View
It was found in a siliceous monomictic reservoir. Size of the algae: 3,38µm and it has some warts or protuberances... some idea about de genus????? stratify reservoir secchi disk:...
22 September 2015 1,919 7 View
I found this taxa in a reservoir. Thanks in advance
29 April 2015 2,077 13 View
Is this a Staurastrum elongatum or similar...... or Is this a Staurastrum luetkemuellari in reproduction??? Thanks in advance
11 April 2015 707 4 View
It was found in a reservoir. Thanks in advance.
17 November 2014 1,088 7 View
Saline temporay lake. Fixed with lugol. Someone can help me with the taxonomy thanks in advance Maria
01 January 1970 8,034 3 View
