Kurt Carpenter Interview 2A - Minam River Algae (B-Roll)

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Raw interview footage of hydrologist Kurt Carpenter discussing algae in the Minam River near the town of Wallowa, in eastern Oregon. Footage shot in August 2011 as part of the USGS National Water Quality Assessment Program hydrologic benchmark study.


Date Taken:

Length: 00:05:21

Location Taken: Wallowa, OR, US


Here we are streamside on the Minam River, again. Where we've got a few rocks here that have

some representative types of algae that we
find in this river. Here's some filamentous

green algae. Some strands of algae. A little
bit, not a whole lot. This kind of algae likes

a lot of nitrogen, a lot of phosphorus, but
we don't seem much out here. This indicates

that there is some nutrient enrichment here,
but it's not very great. Again, consistent

with the reference quality of the stream.

Most of the rocks that we are collecting sort of look 
like this. Can't really see much algae on there, but

the way we sample this is we put this over here like that. We take this brush. We scrap around the edge.

Scrubbing a lot harder to get rid of all 
that algae around the scribe.

Then when we go to collect our sample we 
use a different brush.

(scrubbing noise)

This is what a sort of healthy diotom 
biofilm would look like.

Sort of golden brown in there.

And then there's lots and lots of benthic invertebrates.
All kinds of different little critters.

These guys happen to be long-cased
caddis flies that graze on the algae.

Then we have some other kinds like here. 
We've got nitrogen fixing nostoc algae here.

Likes moderate phosphorus enrichment.

And then over here we have

some more of this filamentous green algae.

Probably some *WORD*. We'll have that identified 
by the lab under the microscope.

This rock happens to have a little higher 
abundance than what's typical out here.

And then there's some of this stuff,
which is very interesting. Real coarse material.

It's a red algae called Lemanea.

And this we also find in Cascade streams in 
higher abundances than what we see here.

I had to look pretty hard just to find 
this example,

but most of the rocks here look sort of like this where there's not really a whole lot of algae on there.

So taken together,

what I would say for this stream is that 
there is a fair amount of algae,

but it's definitely on the low end.

And, even though there's not a lot benthic 
invertebrates out here

the algae just don't seem to be accumulating 
very high abundances.

The biomass levels are definitely below what we
would consider a nuisance threshold. And

But there is some algae and so that's feeding the population
of benthic invertebrates and other aquatic

insects in the stream that go on to feed the
fish. So tomorrow we'll electrofish the stream

and we'll see what kind of fish populations
are here.

That. That's the nostoc.

Then we have more of this stuff. You can see that's 
different than the last stuff we were looking at.

Sort of stringy.

And then this is crazy stuff. This stuff. 
Its got nodes there.

Can you hold it over the bucket a little bit more 
so that I can get the white background against it?

Okay, that's fine.

Kind of looks like some sort of marine something

It does. It has these nodes.

A lot of this in the Clackamas.