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Index of Subjects --------=_MB4C0BCBBA-E9A2-4588-9FC5-2590764609B2 Content-Type: text/plain; format=flowed; charset=utf-8 Content-Transfer-Encoding: quoted-printable Hi Nancy & All, I admit not having wondered about this but I think he makes a simple= =20 process complicated. The air pockets to which he refers are presumably=20 intercellular spaces which in the absence of photosynthesis presumably=20 can become water filled. Starch has a specific gravity of 1.5 g/mL and,=20 in cooler weather starch will accumulate when respiration slows more=20 than photosynthesis and the submarine will sink. With warming, growth=20 resumes, respiration and starch consumption rates increase and the=20 submarine rises. Yt, DW, Kentville ------ Original Message ------ From: "nancy dowd" <nancypdowd@gmail.com> To: naturens@chebucto.ns.ca Sent: 3/10/2018 9:08:02 AM Subject: [NatureNS] Duckweed >This is an interesting article on Duckweed seasonal disappearance and=20 >reappearance in the Spring 2018 issue of Northern Woodlands Magazine.=20 >https://northernwoodlands.org/outside_story/article/duckweed-migration > >I had never really thought about where it went in Fall or how it=20 >re-emerges in Spring. Such an important floating pond plant in=20 >productive fresh water > >Nancy D > >Sent from my iPad --------=_MB4C0BCBBA-E9A2-4588-9FC5-2590764609B2 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable <html><head><style id=3D"css_styles" type=3D"text/css"><!--blockquote.cite= { margin-left: 5px; margin-right: 0px; padding-left: 10px; padding-right:0p= x; border-left: 1px solid #cccccc } blockquote.cite2 {margin-left: 5px; margin-right: 0px; padding-left: 10px;= padding-right:0px; border-left: 1px solid #cccccc; margin-top: 3px; padding= -top: 0px; } a img { border: 0px; } li[style=3D'text-align: center;'], li[style=3D'text-align: right;'] { list= -style-position: inside;} body { font-family: Tahoma; font-size: 12pt; }--></style></head><body><di= v>Hi Nancy & All,</div><div>=C2=A0 =C2=A0 I admit not having wondered a= bout this but I think he makes a simple process complicated. The air pocket= s to which he refers are presumably intercellular spaces which in the absen= ce of photosynthesis presumably can become water filled. Starch has a speci= fic gravity of 1.5 g/mL and, in cooler weather starch will accumulate when= respiration slows more than photosynthesis and the submarine will sink. Wit= h warming, growth resumes, respiration and starch consumption rates increas= e and =C2=A0the submarine rises.</div><div>Yt, DW, Kentville</div> <div><br /></div> <div>------ Original Message ------</div> <div>From: "nancy dowd" <<a href=3D"mailto:nancypdowd@gmail.com">nancypd= owd@gmail.com</a>></div> <div>To: <a href=3D"mailto:naturens@chebucto.ns.ca">naturens@chebucto.ns.ca= </a></div> <div>Sent: 3/10/2018 9:08:02 AM</div> <div>Subject: [NatureNS] Duckweed</div><div><br /></div> <div id=3D"xd49ec0a2bdf4406"><blockquote cite=3D"A593EEEC-616D-49BA-B70F-CA= 21003EAEDB@gmail.com" type=3D"cite" class=3D"cite2"> This is an interesting article on Duckweed seasonal disappearance and reapp= earance in the Spring 2018 issue of Northern Woodlands Magazine. <a href=3D= "https://northernwoodlands.org/outside_story/article/duckweed-migration">ht= tps://northernwoodlands.org/outside_story/article/duckweed-migration</a><di= v><br /></div><div>I had never really thought about where it went in Fall o= r how it re-emerges in Spring.=C2=A0<span style=3D"background-color: rgba(2= 55, 255, 255, 0);">Such an important floating pond plant in productive fres= h water=C2=A0</span><br /><div><br /></div><div>Nancy D<br /><br /><div id= =3D"AppleMailSignature">Sent from my iPad</div></div></div></blockquote></d= iv> </body></html> --------=_MB4C0BCBBA-E9A2-4588-9FC5-2590764609B2--
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