Archive for the 'field microscopy' Category

Videomicrographs at 1,000x Magnification With Hoffman Modulation Contrast

Wednesday, January 10th, 2007

In a previous post, I described upgrading the light source in my large Olympus microscope. That setup is now in place and here is the first example:

Identity of our mystery guest?

Thursday, December 21st, 2006

In a post last January I described an entertaining ciliate found in samples from Herons Head Park. I could not identify the species so I posted images and a movie of the critter and asked for nelp. The subsequent discussion touched on Dileptus, Lacrymaria, and Litononus as possibllities. All are members of the Class Gymnostomea […]

Seeing Three Dimensions in the Microscope

Tuesday, December 12th, 2006

Microscope images often look flat and lack detail. There are two reasons for this: First, most microscope lenses have little depth of field, so only a thin plane is in focus; Second, most microscopic critters are transparent and their organelles are transparent, too. This is a photomicrograph of a Cyanobacterial mat sample, taken from the […]


Sunday, September 17th, 2006

The objective of our Hidden Ecologies Don Edwards San Francisco Bay National Wildlife Researve Drawbridge Site Study is to follow Salt Marsh evolution in two salt ponds in the Drawbridge area. The levees impounding salt water in these ponds were breached in the spring of 2006. Development of a healthy Salt Marsh depends on the […]

Bridge at the End of Boardwalk

Monday, September 11th, 2006

The New Chicago Marsh is a non-tidal salt marsh behind the Environmental Education Center of the Don Edwards San Francisco Bay National Wildlife Refuge. If you go out the back of the Environmental Education Center, you will find yourself on New Chicago Marsh Boardwalk.

Weeping Beauty

Tuesday, September 5th, 2006

A week or so ago Wayne Lanier and I took a hike out to Drawbridge. Starting at the Alviso Marina, we stopped in several places where Wayne took microbiological samples and I shot aerial photographs. I headed back down to Drawbridge on Sunday with my son Charlie Benton and this time I collected a few […]

Heron’s Head Park Salt Marsh – July and August in 2006

Friday, August 25th, 2006

Salt pond observations in Heron’s Head, made July 15 and August 22, 2006, show some startling changes.

Micro-community Addendum to the Drawbridge Report by Cris

Wednesday, August 23rd, 2006

Among the sequence of aerial photographs in the Drawbridge Report by Cris is a very large brilliantly-green pond. While Cris was getting his kite aloft…

YouTube as a video host / repository

Tuesday, July 25th, 2006

I received a note from Wayne this morning saying that he has worked out the mechanics of posting microscope movies to YouTube. YouTube is emerging as the most popular service for sharing small videos — functioning in many ways as Flickr does for still images. And, like Flickr, YouTube allows its material to be inserted […]

Exploratorium Hike to the Don Edwards San Francisco Bay Wildlife Reserve

Friday, July 7th, 2006

We will meet at noon on Sunday, July 9th, in the Upper Parking Lot of the Visitor Center, 9800 Thornton Avenue, Fremont, CA. Shown below is the predicted TIDE PLOT for Saturday and Sunday.