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Hi Lance & All,
I am guessing that tree death is due to winter kill of growth which,=
=20
due to excess N, failed to harden off. But, does guano also kill woody=20
perennials where winter kill is not possible (too warm) ?
Yt, DW, Kentville
------ Original Message ------
From: "Laviolette, Lance" <lance.laviolette@lmco.com>
To: "naturens@chebucto.ns.ca" <naturens@chebucto.ns.ca>
Sent: 3/29/2018 12:26:34 PM
Subject: RE: [NatureNS] Cormorants and Great Blues
>Hi Everyone,
>
>
>
>That=E2=80=99s the usual cycle of Great Blue Heron and Double-creasted=20
>Cormorant nesting on Nova Scotia Islands.
>
>
>
>Grass > Brambles> Shrubs > Trees > double-crested cormorants/great blue=20
>herons > Trees > Shrubs/brambles > Grass
>
>
>
>Guano is a great fertilizer, rich in nitrogen, phosphate and potassium,=20
>but like any fertilizer, too much is not a good thing and as everyone=20
>who has visited a cormorant or great blue heron colony knows, they=20
>produce a lot of guano.
>
>
>
>The Great Blue Herons move to start the process on another treed island=20
>once the trees are all killed and can no longer support a nest=20
>structure (although I did come across Great Blue Herons nesting on an=20
>island in a lake in Yarmouth County once).
>
>
>
>The Grass stage is prolonged as long as gulls and/or the cormorants=20
>start nesting on the ground. Common Eiders can be in the mix at several=20
>stages.
>
>
>
>The Grass stage ends and plant succession begins when these ground=20
>nesting species are forced to move off the island and erosion hasn=E2=80=
=99t=20
>reduced the island to mostly bare rock.
>
>
>
>Cheers,
>
>
>
>Lance
>
>
>
>Lance Laviolette
>
>Glen Robertson, Ontario
>
>
>
>
>
>
>
>From:naturens-owner@chebucto.ns.ca=20
>[mailto:naturens-owner@chebucto.ns.ca] On Behalf Of John and Nhung
>Sent: March 29, 2018 10:36 AM
>To:naturens@chebucto.ns.ca
>Subject: EXTERNAL: RE: [NatureNS] Cormorants and Great Blues
>
>
>
>Here=E2=80=99s s story from before your time, John K.!
>
>
>
>Years ago, the island in mid-Yarmouth Harbour was well-treed. Mighta=20
>been back in the =E2=80=9970=E2=80=99s that cormorants started to get more =
abundant and=20
>really liked that island. Lotsa bushes on the island now; all the=20
>spruce trees died out.
>
>
>
>From:naturens-owner@chebucto.ns.ca=20
>[mailto:naturens-owner@chebucto.ns.ca] On Behalf Of Nick Hill
>Sent: March 29, 2018 10:21 AM
>To:naturens@chebucto.ns.ca
>Subject: Re: [NatureNS] Cormorants and Great Blues
>
>
>
>John, are double-crested cormorants becoming a disturbance and habitat=20
>enrichment problem here in NS..similar in a way to herring gulls?
>
>Nick
>
>
>
>On Thu, Mar 29, 2018 at 10:02 AM, John Kearney=20
><john.kearney@ns.sympatico.ca> wrote:
>
>Hi All,
>Two Double-crested Cormorants and six Great Blue Herons arrived at the=20
>Johns Island nesting colony in Yarmouth Harbour this morning. There=20
>seemed to be more cormorants crouching in grass, perhaps recovering=20
>from their journey. I couldn=E2=80=99t tell for sure.
>None of these were there yesterday when I checked.
>John
>
>Sent from my iPhone
>
>
>
>
>
>
>--
>
>Dr. N.M.Hill
>Fern Hill Institute of Plant Conservation
>424 Bentley Road, Berwick, NS, B0P 1E0
>
>phone 902-698-0416
>
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<body><div>Hi Lance & All,</div><div>=C2=A0 =C2=A0 I am guessing that t=
ree death is due to winter kill of growth which, due to excess N, failed to =
harden off. But, does guano also kill woody perennials =C2=A0where winter=
kill is not possible (too warm) ?</div><div>Yt, DW, Kentville=C2=A0</div>
<div><br /></div>
<div>------ Original Message ------</div>
<div>From: "Laviolette, Lance" <<a href=3D"mailto:lance.laviolette@lmco.=
com">lance.laviolette@lmco.com</a>></div>
<div>To: "naturens@chebucto.ns.ca" <<a href=3D"mailto:naturens@chebucto.=
ns.ca">naturens@chebucto.ns.ca</a>></div>
<div>Sent: 3/29/2018 12:26:34 PM</div>
<div>Subject: RE: [NatureNS] Cormorants and Great Blues</div><div><br /></d=
iv>
<div id=3D"x2636aaa9cf7c40d"><blockquote cite=3D"990B3EE94E8A61448C998FEBAE=
AFC024232CEFAF@hcxdspm2.ca.lmco.com" type=3D"cite" class=3D"cite2">
<div class=3D"WordSection1">
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:"Ca=
libri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">Hi Everyon=
e,<o:p xmlns:o=3D"#unknown"></o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:"Ca=
libri",sans-serif;color:#1F497D;mso-fareast-language:EN-US"><o:p xmlns=
:o=3D"#unknown">=C2=A0</o:p></span></p>
<p class=3D"MsoNormal"><span style=3D"font-size:11.0pt;font-family:"Ca=
libri",sans-serif;color:#1F497D;mso-fareast-language:EN-US">That=E2=80=
=99s the usual cycle of Great Blue Heron and Double-creasted Cormorant nest=
ing on Nova Scotia Islands.