second sampling site
about 130 um long and 78 um wide
pinnatum or oblongum
Freshwater pond, microscopy 2-60x, regular light and darkfield.
51 microns across at thinnest point; 75 microns diagonally.
terrestrial, from Candelaria concolor lichen
In freshwater with high conductivity, pH 8.5 and borderline eutrophic
Eucampia zodiacus Ehrenberg 1839
A live image of the marine diatom Eucampia zodiacus Ehrenberg 1839. Class, Mediophyceae; Subclass, Chaetocerotophycidae; Family, Hemiaulaceae. E. zodiacus is the type species for this genus (Guiry & Guiry 2021).
Girdle view. Only five species of Eucampia reported (Round et al., 1990, Guiry & Guiry 2021). Cells often form flattened chains by interlocking the two short apical elevations (horns). The wide apertures between valves may be elliptical, oval, angular elliptical to square in outline. Valves are concave between the two elevations. The labiate process (rimoportulae) is centrally located on the valve. Helical-spiral chains form due to small differences in growth of the valves and girdle. Chloroplasts are round to ovoid bodies (Hendey 1964, Hasle & Syvertsen 1996, Hoppenrath 2009).
Eucampia zodiacus is a cosmopolitan marine centric diatom species, not reported from polar regions. Frequently found in plankton samples from Trincomali Channel, Galiano Island, BC., Canada (Waters 1972, Shim, 1976)
Methods:
From marine plankton collected in the Trincomali Channel, Spanish Hill Wharf, North Galiano Island, Gulf Islands, British Columbia, Canada, May 15, 2021. Live sample. Nikon TE300, 40x DIC NA 0.90.
References:
Guiry, M.D. & Guiry, G.M. 2012. AlgaeBase. World-wide electronic publication, National University of Ireland, Galway. http://www.algaebase.org; searched on 16 May 2021.
Hasle, G.R. & Syvertsen, E.E. (1996). Marine Diatoms. In: Identifying Marine Phytoplankton. (Tomas, C.R. Eds), pp. 173-176, Plate 35, p. 175. San Diego: Academic Press.
Hendey, N.I. (1964). An introductory account of the smaller algae of British coastal waters. Part V. Bacillariophyceae (diatoms). Her Majesty’s Stationary Office, London. pp. 107. Plate VII, fig. 1.
Hoppenrath, M., Elbrachter, M., Drebes, G. (2009) Marine Phytoplankton, Selected microphytoplankton species from the North Sea around Helgoland and Sylt. Schweizerbart’sche Verlagsbunchhandlung, Stuttgart, Germany. p. 98, Figs 42 j-q.
Round, F.E. Crawford, R.M. and Mann, D.G. (1990). The Diatoms, Biology & Morphology of the Genera, pp. 262-263. Cambridge University Press, Cambridge, UK.
Shim, J. H. (1976). Distribution and Taxonomy of Planktonic Marine Diatoms in the Strait of Georgia, B.C. Phd. Thesis, UBC. p. 152., p. 224 Plate II. Fig. 2.
Waters, R.E., Brown, L.N. and Robinson, M.G. (1972). Phytoplankton of Esquimalt Lagoon, British Columbia: Comparison with West Vancouver Island Coastal and Offshore Waters. Canadian Technical Report of Hydrography and Ocean Sciences. No. 37. Department of Fisheries and Oceans. p. 7, Table 2.
In water sample from Delaware-Raritan Canal at Griggstown, with plankton net.
From water sample taken with plankton net in Delaware-Raritan Canal, Griggstown, NJ.
Mag. 400x
For comparison see http://www.digicodes.info/Micrasterias_furcata.html#2014039005.
A pond edge water sample (freshwater) was taken on 9/10/2021 using a 10 micron dip net to enrich for microorganisms.
Mag. 400x
For comparison see http://protist.i.hosei.ac.jp/PDB/Images/Chlorophyta/Micrasterias/mahabuleshwarensis.html.
A pond edge water sample (freshwater) was taken on 9/10/2021 using a 10 micron dip net to enrich for microorganisms.
Mag. 400x
A shoreline water sample was taken on 7/27/2021 from the Thames River estuary (New London county, CT - brackish) using a 10 micron dip net to enrich for microorganisms.
Collected 20210802 from a river tributary (Manatawny Creek, tributary of Schuylkill River), scoop of sediment near the bank. Added 1% milk that evening, then allowed to sit.
Collected 20210802 from a river tributary (Manatawny Creek, tributary of Schuylkill River), scoop of sediment near the bank.
Mag. 400x
A shoreline water sample was taken on 7/27/2021 from the Thames River estuary (New London county, CT - brackish) using a 10 micron dip net to enrich for microorganisms.
found in algal mat in shallow man made pool/pond hybrid.
found in algal mat in shallow man made pool/pond hybrid.
Mag. 400x
Large Amphora (a little over 100µ), ventral view (I think). ID based on the large size and images here https://diatoms.org/species/amphora_ovalis.
A shoreline water sample was taken on 8/9/2021 from a cove off the Thames River estuary (New London county, CT - brackish) using a 10 micron dip net to enrich for microorganisms.
Mag. 400x
See https://diatoms.org/genera/diploneis for comparison... this specimen looks more like D. elliptica (a touch of angularity) versus D. ovalis (smoothly curved over the entire perimeter). The size is in the range of both species.
A shoreline water sample was taken on 8/9/2021 from a cove off the Thames River estuary (New London county, CT - brackish) using a 10 micron dip net to enrich for microorganisms.
Collected 20210802 from a river tributary (Manatawny Creek, tributary of Schuylkill River), scoop of sediment near the bank.
Collected 20210802 from a river tributary (Manatawny Creek, tributary of Schuylkill River), scoop of sediment near the bank.
From HGTC retention pond. 400x.
Mag. 400x
3 Milosira were observed on this day, fitting the description: Large, Medium, and Small. This specimen was the largest form observed.
A shoreline water sample was taken on 7/27/2021 from the Thames River estuary (New London county, CT - brackish) using a 10 micron dip net to enrich for microorganisms.
Mag. 400x
A shoreline water sample was taken on 7/27/2021 from the Thames River estuary (New London county, CT - brackish) using a 10 micron dip net to enrich for microorganisms.
Mag. 400x
A shoreline water sample was taken on 8/9/2021 from a cove off the Thames River estuary (New London county, CT - brackish) using a 10 micron dip net to enrich for microorganisms.
Mag. 400x
Not certain of the ID. Seems shorter and wider than images I can Google. Also more tapered at the apices. Might this be a daughter cell that has gone through many divisions thereby acquiring a shortened frustule? (if this is indeed N. sigmoidea) - For Googled images, see: https://www.algaebase.org/search/images/detail/?img_id=33818 and http://nordicmicroalgae.org/taxon/Nitzschia%20sigmoidea. AglaeBase specifies this organism as a freshwater specie.
A shoreline water sample was taken on 7/27/2021 from the Thames River estuary (New London county, CT - brackish) using a 10 micron dip net to enrich for microorganisms.
Collected 20210802 from a river tributary (Manatawny Creek, tributary of Schuylkill River), scoop of sediment near the bank. Added 1% milk that evening, then allowed to sit.
tardigrade eggs from a large sample i'm keeping as a self-sustaining microbiome in a chinese takeout container! not sure the exact species but i have them on a slide in a humidity chamber so i can keep my eye on them! (i actually caught the mom while pregnant, she laid the eggs while on the slide! i named her mocha, so all the babies will have choco names, like java chip, choco curl, malt...)
Sample collected (3/9/2020) at water's edge using a stick to extract filamentous algae and depositing the algae in a small plastic vial containing water from the same location. Air temp. 56F