Indecent diatom behaviour?

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glennbech
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Indecent diatom behaviour?

#1 Post by glennbech » Tue May 03, 2016 9:57 am

What are these two up to?

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75RR
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Re: Indecent diatom behaviour?

#2 Post by 75RR » Tue May 03, 2016 11:24 am

Those look like colonial Diatoms (as in a Colony), they are usually in longer sections/bands.
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glennbech
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Re: Indecent diatom behaviour?

#3 Post by glennbech » Tue May 03, 2016 5:09 pm

You might be on to something, I did not notice the gap between them at first. This is maybe 4 diatoms? I have seen them in another configuration as well in the same water samples; here is one from a slide yesterday.

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75RR
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Re: Indecent diatom behaviour?

#4 Post by 75RR » Tue May 03, 2016 5:34 pm

Second image is a filamentous alga. (thread like)

By the way, your images would be a bit sharper if you magnified them a little less.
1024 pixels is the max permitted size on the longest border, I find 850 pixels wide is a convenient size,
though the final size does depend on the original magnification and whether the final image has been cropped.
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Re: Indecent diatom behaviour?

#5 Post by rnabholz » Tue May 03, 2016 7:21 pm

Hi glennbech,

Here is a snap shot I took recently when checking out a batch of diatoms I had gathered. The long ribbon is nice example of colonial diatoms.

I believe there are at least two other varieties in the shot as well
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glennbech
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Re: Indecent diatom behaviour?

#6 Post by glennbech » Tue May 03, 2016 7:49 pm

75RR wrote:Second image is a filamentous alga. (thread like)

By the way, your images would be a bit sharper if you magnified them a little less.
1024 pixels is the max permitted size on the longest border, I find 850 pixels wide is a convenient size,
though the final size does depend on the original magnification and whether the final image has been cropped.
Thanks for the heads up on image size.

The couple in my original post also come as singles on my slides. In fact, most of them are. Maybe they form colonies when they come in contact with others?

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KurtM
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Re: Indecent diatom behaviour?

#7 Post by KurtM » Wed May 04, 2016 12:18 am

I have often wondered what the deal is with diatom pairs such as you show in your first image. The ribbons of true colonial types that Rod shows - Fragillaria in his case, I believe - usually contain more than just the two. I see your sort of paired individuals quite a lot, doubt they're colonial per se, and notice they're usually pennate forms, which is to say I don't see this behavior across the board, if you will.

What this forum needs is a genuine diatom guru... 8-)
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Re: Indecent diatom behaviour?

#8 Post by gekko » Wed May 04, 2016 4:04 pm

Some good images and an interesting discussion.

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