[LTER-mcm-pi] 5 min gem for the week

[Cristina Vesbach]

I too missed yesterday's call, sorry, I forgot to put the new time in my
calendar.  I think in the summer, physical disruption (streamflow) plays a
big part in maintaining diversity, while micro scale gradients in nutrients
promote diversity.  Can we test this by comparing bacterioplankton dynamics
in summer vs. winter? Or above and below the chemocline?  The limno samples
were loaded onto the sequencer an hour ago, so we can look at these next
week (I think we have 3 summers for 3 lakes on that run, 16S only, but 18S
is prepped and in the queue).  Finally, viruses should play a role too, but
have no data on this.  Samples are prepped, but my student working on this
bailed.  My tech and I are prepping the viriome libraries next week (this
is the last step before sequencing).

On Wed, Sep 16, 2015 at 10:32 AM, Priscu, John <jpriscu at montana.edu> wrote:

> So where do the MCM soils, streams and lakes fit into this paradigm?
>
>
>
>
>
> *From:* John Barrett [mailto:jebarre at vt.edu]
> *Sent:* Wednesday, September 16, 2015 10:22 AM
> *To:* Priscu, John
> *Cc:* mcm-pi at lists.lternet.edu
> *Subject:* Re: [LTER-mcm-pi] 5 min gem for the week
>
>
>
> Wow, that's uncanny John. I was just using the paradox of the plankton in
> discussion with my grad students.
>
>
>
> My guess would be viruses to explain diversity in lakes. They are
> otherwise too stable - unless we can invoke flood years as a physical
> disruption that offsets competative exclusion. Are there data in the cool
> years to show decreases in diversity? That would be a test of whether
> floods acted to upset equilibrium in species composition.
>
>
>
>
>
>
>
> On Wed, Sep 16, 2015 at 12:15 PM, Priscu, John <jpriscu at montana.edu>
> wrote:
>
> Sorry that I missed the call yesterday—didn’t get home from Europe until
> midnight and was not well organized—in other words, I forgot about the call.
>
>
>
> Here would be my gem for the week: So, where does the MCM fit into
> Terborgh’s scheme? We have few predators (I think we do—at least for the
> lakes), yet biodiversity is relatively high. What replaces predators in our
> system—Viruses? physical disruption? Maybe physical disruption occurs
> faster than competitive exclusion, maintaining high diversity? This kind of
> contemporaneous disequilibrium has been proposed by Richerson et al. 1970
> (attached) [Richerson was the chair of my grad committee].
>
>
>
> JP
>
>
> _______________________________________________
> Long Term Ecological Research Network
> mcm-pi mailing list
> mcm-pi at lternet.edu
>
>
>
>
>
> --
>
> J. E. Barrett, Ph.D.
> Associate Professor
> 2125 Derring Hall
> Department of Biological Sciences
> Virginia Tech
> Blacksburg VA, 24061
>
> _______________________________________________
> Long Term Ecological Research Network
> mcm-pi mailing list
> mcm-pi at lternet.edu
>
>


-- 
Cristina Takacs-Vesbach
Assoc. Professor
UNM Biology
MSC03 2020
Albuquerque, NM 87131

505-277-3418/3316
Fax: 505-277-0304

Fed Ex packages
UNM Biology
133 Castetter Hall
Albuquerque, NM
87131
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.lternet.edu/pipermail/mcm-pi/attachments/20150916/d354e76b/attachment-0001.html>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: image001.jpg
Type: image/jpeg
Size: 51708 bytes
Desc: not available
URL: <http://lists.lternet.edu/pipermail/mcm-pi/attachments/20150916/d354e76b/attachment-0001.jpg>