Archive for the 'field microscopy' Category

Tidal Dynamics of a Heron’s Head Salt Marsh Pond

Wednesday, June 21st, 2006

In my visits to the Heron’s Head Salt Marsh, I have seen the marsh flooded at high tide and and more than 2-meters above the water at a minus low tide. This tidal excursion plays an important role in the salt marsh micro-community. Here my sample site is shown inundated at high tide…

Herons Head sample from Jan. 28

Thursday, May 11th, 2006

I looked back in my files to see if I had photographs from microscope samples at Herons Head taken between Wayne’s fall and spring samples. I found one set from samples taken on 28 January at the site where Mateo is standing a few posts down. Sample image featuring a ciliate of some sort. I […]

Seasonal Change in Heron’s Head Salt Marsh Micro-community

Monday, April 17th, 2006

In the post prior to this one [see below – Heron’s Head Salt Marsh Losing Salt], I observed that both San Francisco Bay and salt marsh ponds on Heron’s Head were becoming much less salty with the winter rains. In this post, I describe how this has impacted the Heron’s Head salt marsh micro-community. Figure […]

Heron’s Head Salt Marsh Losing Salt

Thursday, April 13th, 2006

Actually, as it turns out, most of San Francisco Bay is becoming less salty these days. Matteo Neivert, Exploratorium Visiting Artist, and I were hiking around the Heron’s Head salt marsh on Thursday morning of April 6th. I took several samples near our previous sampling sites, and while I was at it, I checked the […]

Winogradsky update

Wednesday, February 22nd, 2006

My first Winogradsky column debuted to much fanfare last October when its inaugural description featured optimistic photographs of the column in a sunny bedroom window. Soon thereafter, complex spousal negotiations led to the relocation of this marsh muck experiment in a dark basement room. In this location the column remained fairly static — just marsh […]

Heron’s Head critters

Tuesday, January 24th, 2006

I stopped by Heron’s Head Park late Sunday and took a few panoramic photo sets. While there I collected three vials of samples from locations on the edge of the wetlands. The most entertaining sample was from a location just up the shore a bit from where Wayne collected earlier samples. The sample site shown […]

I am ready for my close up ..

Wednesday, December 28th, 2005

Over the holidays I have been experimenting a bit on workflow for video segments. Having never really played with video editing there is much to learn. The two-minute sequence linked below was assembled using Adobe Premiere Elements v2.0 and features an unknown creature. I found this ciliate (?) in a sample taken from Salt Pond […]

Zooming in

Monday, December 19th, 2005

We have had a rainy weekend hereabouts so I turned my attention to a set of samples taken earlier this week from several salt ponds near the eastern end of the Dumbarton Bridge. All of the ponds were in a green phase. This guy was charging around my slide as though a science fiction space […]

Lovely Dunaliella

Wednesday, November 9th, 2005

Wayne and I were talking the other day about Duniella, the tiny flagellated algae that lend such fine color to many of the ponds. The conversation brought to mind a nice passage from John Postgate’s Outer Reaches of Life (appended), a book read at Wayne’s suggestion. Dunaliella images from http://www.uwm.edu/Dept/Biology/Docs/EEB/ and www.biol.tsukuba.ac.jp/~inouye/ino/g/chl/chlorophytes.html respectively. Dunaliella come […]

A Second DNA Barcode Sample Set

Saturday, November 5th, 2005

On Thursday, November 3rd, I got off a second sample set of microorganisms for DNA Barcoding. The first set was described in the earlier post further below: “A Sample Protocol Suitable for DNA Barcoding”. At Mono Lake, Sample Site #2 was about 100-yards east of the first sample site, where a finger of dried mud […]