Limitations of DSB's

[NewReefer]

Now that I can Understand!

[aquaticsdeptleader]

increased nutrients genraly lead to higher concentrations of alage, these algaes most likly would compete with the zoo in the coral if it was absorbed perhaps this was what the coral evoulatinarly learned?

jim

[SPC]

Originally posted by aquaticsdeptleader
increased nutrients genraly lead to higher concentrations of alage, these algaes most likly would compete with the zoo in the coral if it was absorbed perhaps this was what the coral evoulatinarly learned?

jim

Well not according to this Jim: http://reefkeeping.com/issues/2003-05/snn/index.htm

I'm still trying to sort this one out
Steve

[aquaticsdeptleader]

well that eleminates that train of thought

perhaps there is enough steam to get the wheels roleing on another



oh wait nope

jim

[NewReefer]

DSB pump!

I'm gonna make a DSB pump, whch will resemble a skimmer and every now and then I'll turn it on and vacuum up small portions of the DSB, filter it then return it back to the sb.

[NewReefer]

Any Bits?

[NewReefer]

Bites? lol

[Spanky]

>>I'll bet there's none now<<

Not a bit, Steve. sniff!

>>My question is "why" does the stony coral do this Jerel?<<

I had to ask Chris. I'm having a total "brain fart" day. I know why, I just couldn't for the life of me come up with a way of saying it.

[[quote: You mean jim's question on the hypothesis behind it?

There are a couple. The most popular is nutrient loading limitation. In the higher concentrations of nutrients. Corals are very strict moderators of their symbiosis with zooxanthellae. They slow down their uptake at higher concentrations because they are saturated with the molecules they are taking the N, P and C from, they can do this since they aren't relying on a gradient for transport: the concentration in the tissues quickly skyrockets relative to the seawater. With such high saturation, osmosis out could even become a problem. Even if the cells could continually uptake without the limitation, it would ruin the strict allowance corals make in regards to giving up nutrients for zooxanthellae fertilizer.

Am I making sense?]]

(immediately followed by this)

[[quote: Sorry, that was backwards:
corals are iso osmotic. too many nutrients concentrated against such a high ambient concentration = osmosis into the cells.]]

from this you can deduce that "brain fart" days are contagious.

>>I'm still trying to sort this one out
Steve<<

There's only so much a herbivorous animal can eat and only so much room for those animals. With high nutrients and the right conditions, it's possible for there to be too much algae and not enough things to eat it. Not because they were overcollected or come disease killed them, but simply because of suitable territory. But, yes in a sense, having them die off certainly didn't help matters.

>>I'm gonna make a DSB pump, whch will resemble a skimmer and every now and then I'll turn it on and vacuum up small portions of the DSB, filter it then return it back to the sb.<

LOL Scott, it's called lots of circulation and a dang good high powered skimmer.

[aquaticsdeptleader]

on a side and totaly diffrent note what if if the coral skelton is the symboint and not vice versa

not knowing the the evluationary track of the coral iam assumeing they strarted as filter feeders that took in zoo and one of two things happened either the coral was unable to digest it and got lucky because it was a nice food source because it can eat the bio products or the zoo evolved and could no longer be digested and simply used the coral as a shell makeing the zoo the evoulationary driveing force

sorry iam probably way off on it all but my 8hrs of work are done you cant expect me to have coherent thoughts.

jim

[Spanky]

from this you can deduce that "brain fart" days are contagious.

sorry iam probably way off on it all but my 8hrs of work are done you cant expect me to have coherent thoughts.

and BF has claimed another victum.

Jim, I think it's very mutual. That's the way corals change zoox BTW.

[NewReefer]

Did someone mention the Limitations of DSB's

oops fart!~~~

[SPC]

Originally posted by Spanky
>>I'll bet there's none now<<

Not a bit, Steve. sniff!

[[quote: Sorry, that was backwards:
corals are iso osmotic. too many nutrients concentrated against such a high ambient concentration = osmosis into the cells.

Well I sure can't complain about it too much Jerel, my Dad built quite a few houses in that subdivision. One of the houses was for Sylvia Hichcock's parents (remember Mrs Universe of 1970(?))?

So what we are saying here is that due to corals being iso osmotic, the high nutrients will be forced into the coral cells.
If I am correct with my assumption, how does this harm the coral? Are they forced to recieve nutrients that they don't need/toxic to them? Does this make it difficult (impossible in some cases) for the coral to eliminate through osmosis?
Steve

[Spanky]

Somehow I remember it being something like that, only backwards. (god help me it's been decades) If I remember right (50/50) it has something to do with them not being able to get something out, not getting something in.
Plus, you have to keep in mind the coral. If you're talking scleractinia, they are built to conserve and share with their zoox. In a environment that most of the time has very low levels.

[galleon]

Steve, not quite. If concentrations are very high and corals allowed the nutrients into their cells as fast as possible (which very fast, considering new water is continually refreshed through the ciliated gastrovascular cavity and siphonoglyphs by cilia), osmosis of water into the cell would occur dangerously fast; that is osmosis of water only, not nutrients. Nutrient uptake is only active. Nutrients uptaken are only organic. However, once nutrients concentrate higher in the cells, water enters to dilute these ions. This is known as osmotica. Some plants (mangroves, mangrove community succulents like Sueda and Batis) do this on purpose to keep from becoming water stressed (too much water moving out to essentially attempt to dilute the ocean) in their saline environments...as a result, it makes them often edible, and usually pretty tasty.

Overall, uptake limitation in higher organics is a safety measure.

[Spanky]

That's it! They can't get water out and they'd explode! LOL

Thanks a million Chris.