Questions tagged [algae]

Algae is an informal term for a large, diverse group of photosynthetic eukaryotic organisms that are not necessarily closely related, and is thus polyphyletic.

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What are these black masses floating on my pool?

I've been cleaning them for some time. At first I thought it was some kind of synthetic material, but when I took one with my fingers it disintegrated into filaments. I placed another under my usb ...
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Floats of Algae, a house-made conjecture

Background In North of Scotland there are many seaweed types. One is a green algae (chlorophyta). They are full of 'bubbles'. According to web searches one of those bubbles (there are two types you ...
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Is Cell Concentration a Major Causal Factor In Lag Phase Specific Growth Rate of Chlorella?

Literature on lag phase low specific growth rate seems invariably to assume a change in environment to which the single-cell organism must adapt before the specific growth rate reaches its maximum ...
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Where does algae in chlorine-treated water come from?

We live several kilometres away from the sea and we get our water from a deep well. Our water is chlorinated. We have a crystal-clear outdoor swimming pool that is well-maintained through regular ...
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What strains of algae do freshwater fish, snails, and shrimp prefer?

After a deep clean, my aquarium is algae free for the moment. This is a problem for my algaephage fish, snails (mystery and especially nerites who apparently can't eat wafers), and amano and cherry ...
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Minimum LED wattage for a Spirulina growth tank?

I was recommended this stack to ask this, as it seemed like a somewhat tricky question to find an answer to! Originally I had thought that it would be around 300W per square meter, as the general ...
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Are there completely self-sufficient autotrophs?

Are there completely self-sufficient autotrophs which can survive and reproduce indefinitely by consuming exclusively non-organic matter (plus energy from sunlight or thermal vents etc.)? I'm asking ...
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What is “beto carotene” and how can it turn lakes pink?

The BBC News article Pink lake in Australia attracts and delights tourists describes an artificial salt lake in Westgate Park, Melbourne, Australia that tuns pink around February and then in "late ...
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What kind of lichen is it (no. 2)?

I think i found very interesting lichen. I discoved it at 1.15 PM CET in Prague nature conservation area called Divoka Sarka. I took this picture on the place of my discovery. One piece of this ...
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Volvox Cellular Reintegration

A couple of days ago, I answered this question over on worldbuilding.SE with some information about volvoxes, and commenter Liam Proven pointed out that one of the claims I made was dubious. I had ...
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How to grow a spirulina biofilm on a carbon/graphite cylindrical cathode?

I am trying to grow a spirulina biofilm on my cathode for a fuel cell but it doesn't seem to be sticking to the cathode. I have a culture of spirulina and I've submerged a few cathodes in it to try ...
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Do green algae form obligate symbioses with fungi?

I understand that obligate symbioses means that the two organisms cannot live without each other and are in a symbiotic relationship, but do green algae from this with fungi?
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How does the OD correlate with the number of algae cells?

My research team and I are using a spectrometer to measure the OD of an algae sample. We are trying to answer the question "Is there a correlation between OD and the number of algae cells?" What ...
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What are the obstacles to modifying an algae to secrete fuel?

I've been reading a bit about algae fuel. It sounds like people did some work and then decided it was too difficult. This link mentions Exxon's work: https://en.wikipedia.org/wiki/Algae_fuel#...
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Taxonomy problems on algae: Is Cryptophyta a Phylum or a Class rank?

I am currently interested in algae taxonomy (I am not an expert in the field). I retrieved the taxonomy of my sequences with their NCBI access number via the taxonkit software (https://bioinf....
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Where can I find a compendium of microorganisms?

I recently bought a microscope hoping to learn more about algae and bacteria and stuff. I've collected a few samples of pond water and found tons of algae and stuff, but I have no idea what to call ...
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Can Thraustochytrids such as Schizochytrium do photosynthesis?

I know they belong to the phylum of heterokonts and that they are being heterotrophically grown on an industrial scale but I can't seem to find any reference to them being grown photoautotrophically. ...
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Is it possible to use microalgae to produce food and live on it?

I know microalgae have not less protein and starch, grow quickly, require less. So, is it possible to use them for producing food (replace rice and wheat) and live on it? Currently, I only saw people ...