Home |
Search |
Today's Posts |
#24
|
|||
|
|||
algae affected by temp?
I said I'd leave this, and probably should live up to my
word, but I can't accept having words put in my mouth. I originally used the word "cause", and promptly recanted use of the word as overly strong. For the mistake of ever answering a simple question, without perfectly refined scientific word smithing, I'm sorry, again. I restated with higher specificity, namely that P is one nutrient which can serve as limiting. I offered Fe, "perhaps", to highlight the non-exclusive selection of P. Now, Bio 1, not even 101, teaches... "A Species will proliferate unless, or until, it encounters a limiting factor". A proper biological argument, surely any regarding population control, is framed in terms of what "limits" that species, and that species directly. When you do otherwise, you open wider and wider ranges of potential causality. Ignoring this "rule" is particularly dangerous in population control, as you can end up putting multiple species in harms way, caught between your problem population and it's true limiting factor. In being non-specific you end up with logic like - "If you kill Plankton, seals dwindle." Sure, but I'm sure the Plankton is none too happy about your choice of analysis, may they suggest you should just kill the fish directly. From your office, you should know this. You focus on your target and, culling from its requirements alone, determine what can be limited. Work from there. So, maybe we do have to kill the Plankton, but the argument is properly stated "To limit seals, you can limit their food (fish) or, perhaps, mating grounds; we can't control the mating grounds well enough; so to limit fish you can limit their food ..., etc." Algae/BGA exists. If, as you claim, higher plants are limiting, they are doing it through bio-chemistry. Name the link. We know it is resolvable, routinely, in various media, without nutrient starvation of the higher organisms. Resolution/limitation (in tank) rarely depends on predation, need not depend on antibiotic toxicity, and can be accomplished regardless of lighting levels. Whine all you want about PO4 "ain't it", Fe "ain't it", XYZ "ain't it", but until you form a proper biological argument, spelling out what factors ARE "it", I'll go with the nutrient limitation, thank you. Lighting is surely limiting, less light less stuff, but silk plant tanks still do end up infected so "low light" is hardly the complete answer. Temp is limiting, range depending on species, but does the range 68-80 matter to "our" species? Redox seems implicated, but a well lit, reasonably clean, plant tank tends to maintain a serviceable redox on it's own, and I've had BGA at high redox in my reefs. Regardless, we all control light, temp, and less so redox as a matter of routine. BGA/Algae comes and goes. It must be resolving because 1) something in the water is killing it; or 2) it is failing to find something else it needs (nutrients). ****************************************** wrote: I feel I have spent enough time and supported my own arguments and assertions, it's now time for you to look into things for yourself and prove that adding PO4 to a planted tank causes algae. |
Thread Tools | Search this Thread |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Forum | |||
color of leaves affected by available light? | Freshwater Aquaria Plants | |||
Algae Algae Algae | Freshwater Aquaria Plants | |||
Earth is affected by Venus, NASA is affected by GUTH Venus | sci.agriculture | |||
Why some seeds need low temp store to aid germination | Edible Gardening | |||
Earth is affected by Venus, NASA is affected by GUTH Venus | sci.agriculture |