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Hi John & All,
Agreed.
DW
On 6/1/2020 9:32 AM, John and Nhung wrote:
>
> Let me append to your last sentence, “… especially if the houses have
> lawns going all the way down to the lakeshore.”
>
> Never did understand fertilizing lawns, but it’s worse if the lawns
> are on a water body.
>
> *From:*naturens-owner@chebucto.ns.ca
> [mailto:naturens-owner@chebucto.ns.ca] *On Behalf Of *David Webster
> *Sent:* May 31, 2020 12:56 PM
> *To:* naturens@chebucto.ns.ca
> *Subject:* Re: [NatureNS] Winning submissions to Biomimicry contest
> for Youth
>
> Hi John & All,
>
> After a long lapse; getting back to eutrophication.
>
> Nutrient rich waters tend to get bad press because, if some
> limiting element (P usually) becomes high then blooms of usually toxic
> (always ?) Blue Green algae are likely. They can fix N so, given ample
> P, grow like weeds then, unlike weeds die, decay etc.
>
> But nutrient poor water is also undesirable; crystal clear water
> devoid of life as in some glacial lakes. As with most matters, a
> Goldilocks balance is desirable.
>
> There was a good article in American Scientist 65(2): 159-170,
> 1977; The Plant-Animal interface in// Freshwater Ecosystems; Karen
> Glaus Porter and by good luck I found it.
>
> I was especially impressed by "In periods of peak zooplankton
> abundance....the grazer community filtered the entire volume of water
> in a eutrophic (nutrient rich) lake as many as 4.69 times (469%)
> during one day." This was measured using C14.
>
> And yes the fertilized and mowed lawn right down to the water is
> an effective way to mess up a lake. But nothing kills a small lake,
> with small water flow, as efficiently as year round houses and septic
> tanks.
>
> YT, DW, Kentville
>
> YT, DW, Kentville
>
> On 5/28/2020 5:24 AM, John and Nhung wrote:
>
> I followed the link, and it does look interesting.
>
> I predict that eutrophication will be a growing problem here, as
> well, if summers get hotter and drier and predicted (Dare we say …
> as being experienced?”) Our studies down here in God’s country
> over the years have been showing a positive relation between
> rainfall and water colour (which can be translated as dissolved
> humic material). When rainfall is low, colour levels drop, and
> lakes appear susceptible to blooms at lower levels of nutrient.
> Kinda makes sense: light penetration is greater when colour is
> lower and some of those organic molecules may react with nutrients.
>
> We suspect phosphorus of being a greater problem that nitrogen in
> our lakes, but the idea is still interesting.
>
> In the meantime, lake and river front property owners can help by
> leaving their shorelines the blazes alone. Wild shorelines do a
> great job of absorbing nutrients and runoff, thereby controlling
> turbidity, as well. Folks, those nice lawns going all the way
> down to the lake are a terrible idea, especially if you fertilize
> them!
>
> Something else to worry about: The science of cyanotoxicology is
> evolving, but they keep discovering a growing number of very nasty
> toxins in blue-green algae. The effects they have on us humans
> varies, but the mix includes carcinogens and some neurotoxins, for
> a start.
>
> Public education helps, and so do municipal by-laws. But a lot
> more education is needed, and we need PROVINCIAL regulations to
> control the fun and games still being played on lake shores.
> Regulations with consequences for both contractors and property
> owners.
>
> I could write a lot more but for God’s sake, keep lake shores wild!
>
> *From:*naturens-owner@chebucto.ns.ca
> <mailto:naturens-owner@chebucto.ns.ca>
> [mailto:naturens-owner@chebucto.ns.ca] *On Behalf Of *N Robinson
> *Sent:* May 27, 2020 8:48 PM
> *To:* naturens@chebucto.ns.ca <mailto:naturens@chebucto.ns.ca>
> *Subject:* [NatureNS] Winning submissions to Biomimicry contest
> for Youth
>
>
> "*Only* in the *U.S.A.*, you say? Pity..."
>
> https://mailchi.mp/biomimicry/2020ydcwinners?e=9bfd59afac
>
> 3rd place, /The Bay Protector/, may be of interest - dealing with
> eutrophication.
>
> Nancy
>
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<p>Hi John & All,</p>
<p> Agreed. <br>
</p>
<p>DW<br>
</p>
<div class="moz-cite-prefix">On 6/1/2020 9:32 AM, John and Nhung
wrote:<br>
</div>
<blockquote type="cite"
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<div class="WordSection1">
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Let
me append to your last sentence, “… especially if the houses
have lawns going all the way down to the lakeshore.” <o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Never
did understand fertilizing lawns, but it’s worse if the
lawns are on a water body. <o:p></o:p></span></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"><o:p> </o:p></span></p>
<div>
<div style="border:none;border-top:solid #B5C4DF
1.0pt;padding:3.0pt 0cm 0cm 0cm">
<p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif""
lang="EN-US">From:</span></b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif""
lang="EN-US"> naturens-owner@chebucto.ns.ca
[mailto:naturens-owner@chebucto.ns.ca] <b>On Behalf Of
</b>David Webster<br>
<b>Sent:</b> May 31, 2020 12:56 PM<br>
<b>To:</b> naturens@chebucto.ns.ca<br>
<b>Subject:</b> Re: [NatureNS] Winning submissions to
Biomimicry contest for Youth<o:p></o:p></span></p>
</div>
</div>
<p class="MsoNormal"><o:p> </o:p></p>
<p>Hi John & All,<o:p></o:p></p>
<p> After a long lapse; getting back to eutrophication. <o:p></o:p></p>
<p> Nutrient rich waters tend to get bad press because, if
some limiting element (P usually) becomes high then blooms of
usually toxic (always ?) Blue Green algae are likely. They can
fix N so, given ample P, grow like weeds then, unlike weeds
die, decay etc.<o:p></o:p></p>
<p> But nutrient poor water is also undesirable; crystal
clear water devoid of life as in some glacial lakes. As with
most matters, a Goldilocks balance is desirable.<o:p></o:p></p>
<p> There was a good article in American Scientist 65(2):
159-170, 1977; The Plant-Animal interface in<i> </i>
Freshwater Ecosystems; Karen Glaus Porter and by good luck I
found it. <o:p></o:p></p>
<p> I was especially impressed by "In periods of peak
zooplankton abundance....the grazer community filtered the
entire volume of water in a eutrophic (nutrient rich) lake as
many as 4.69 times (469%) during one day." This was measured
using C14. <o:p></o:p></p>
<p> And yes the fertilized and mowed lawn right down to the
water is an effective way to mess up a lake. But nothing kills
a small lake, with small water flow, as efficiently as year
round houses and septic tanks. <o:p></o:p></p>
<p>YT, DW, Kentville<o:p></o:p></p>
<p> <o:p></o:p></p>
<p>YT, DW, Kentville<o:p></o:p></p>
<div>
<p class="MsoNormal">On 5/28/2020 5:24 AM, John and Nhung
wrote:<o:p></o:p></p>
</div>
<blockquote style="margin-top:5.0pt;margin-bottom:5.0pt">
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I
followed the link, and it does look interesting.</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I
predict that eutrophication will be a growing problem
here, as well, if summers get hotter and drier and
predicted (Dare we say … as being experienced?”) Our
studies down here in God’s country over the years have
been showing a positive relation between rainfall and
water colour (which can be translated as dissolved humic
material). When rainfall is low, colour levels drop, and
lakes appear susceptible to blooms at lower levels of
nutrient. Kinda makes sense: light penetration is
greater when colour is lower and some of those organic
molecules may react with nutrients.</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">We
suspect phosphorus of being a greater problem that
nitrogen in our lakes, but the idea is still interesting.</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">In
the meantime, lake and river front property owners can
help by leaving their shorelines the blazes alone. Wild
shorelines do a great job of absorbing nutrients and
runoff, thereby controlling turbidity, as well. Folks,
those nice lawns going all the way down to the lake are a
terrible idea, especially if you fertilize them! </span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Something
else to worry about: The science of cyanotoxicology is
evolving, but they keep discovering a growing number of
very nasty toxins in blue-green algae. The effects they
have on us humans varies, but the mix includes carcinogens
and some neurotoxins, for a start.</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">Public
education helps, and so do municipal by-laws. But a lot
more education is needed, and we need PROVINCIAL
regulations to control the fun and games still being
played on lake shores. Regulations with consequences for
both contractors and property owners.</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D">I
could write a lot more but for God’s sake, keep lake
shores wild!</span><o:p></o:p></p>
<p class="MsoNormal"><span
style="font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D"> </span><o:p></o:p></p>
<p class="MsoNormal"><b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif""
lang="EN-US">From:</span></b><span
style="font-size:10.0pt;font-family:"Tahoma","sans-serif""
lang="EN-US"> <a
href="mailto:naturens-owner@chebucto.ns.ca"
moz-do-not-send="true">naturens-owner@chebucto.ns.ca</a>
[<a href="mailto:naturens-owner@chebucto.ns.ca"
moz-do-not-send="true">mailto:naturens-owner@chebucto.ns.ca</a>]
<b>On Behalf Of </b>N Robinson<br>
<b>Sent:</b> May 27, 2020 8:48 PM<br>
<b>To:</b> <a href="mailto:naturens@chebucto.ns.ca"
moz-do-not-send="true">naturens@chebucto.ns.ca</a><br>
<b>Subject:</b> [NatureNS] Winning submissions to
Biomimicry contest for Youth</span><o:p></o:p></p>
<p class="MsoNormal"> <o:p></o:p></p>
<div>
<div>
<p class="MsoNormal"><br clear="all">
<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><span class="e24kjd">"<b>Only</b> in
the <b> U.S.A.</b>, you say? Pity..." </span><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"> <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"><span class="e24kjd"><a
href="https://mailchi.mp/biomimicry/2020ydcwinners?e=9bfd59afac"
moz-do-not-send="true">https://mailchi.mp/biomimicry/2020ydcwinners?e=9bfd59afac</a></span><o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"> <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">3rd place, <i>The Bay Protector</i>,
may be of interest - dealing with eutrophication. <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"> <o:p></o:p></p>
</div>
<div>
<p class="MsoNormal">Nancy<o:p></o:p></p>
</div>
<div>
<p class="MsoNormal"> <o:p></o:p></p>
<div>
<div>
<div>
<div>
<div>
<div>
<div>
<div>
<div>
<p class="MsoNormal"> <o:p></o:p></p>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
</blockquote>
</div>
</blockquote>
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