Ngunguru Estuary

  • 20-Mar-2022

So this stuff here, this is an alga that's growing on top of. And now these algae is what we call a nutrient indicator algae. So in other words, it's indicating that there are too many nutrients coming down the histories from the catchment area. But this is the thing you see when you look at this that's covering it, and it's kind of smothering the sand, if I put my finger in here and I, dig just below the surface of the sand, look, how black that is, and that blackness indicates that there's, no oxygen.

So we paint this as an oxygen free zone here, and it's got a special word that we name it with it's called an anoxic zone, so, oxygen free zone. Okay, that means that nothing can live in here except bacteria. If we just go over here away from where that is let's have a look at the difference.

If I dig into here, see how it's still going down, but no we're nearly black as it was like to dig down further before it gets wet. So that's, still now getting to there, there's, no oxygen, but that's, much it's, a little.A bit deeper now, if we went to a really clear area further over away from any of these algae, we'd find there it's, not as there's nowhere near as bled in other words of silver oxygen. In fact, come over this way to most by whether water is always have a look at this spot here. We dig into here. Look at there, see the difference in that.

So now with it's going a little data, but we've got we've still got oxygen here. That means that thinks he's still living here, things like poppy's cockle that. Sort of thing we go into the water. This is pretty much always got water, I, don't know if you can see that, but there's, no blackness to it really so there's, plenty of oxygen in that sand. So this is really important.

This tells us a lot about the health of our history. When we see this kind of blanketing algae to star Kelby this growing over things, that's, an indicator that there are too many nutrients. So one of the things that we look at and particularly in the intertidal areas, eastern areas, an. Intertidal area and so we're, looking at that cover of the Elton there's, an indicator for us. If things are a little out of balance, you.

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