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It=E2=80=99s a very long census night, when no owls are detected.
=20
A tool that could be used to compare owl habitat from year to year is =
Global Forest Watch. Global Forest Watch maps tell the story of forest =
losses from 2001-2014. This database is about to be updated to include =
years 2015 and 2016. We=E2=80=99re likely going to see quite a stark =
change in NS. We won=E2=80=99t have to wonder why we detect fewer owls.
=20
Link below. Takes a while to load. You can click on Forest cover =
gain/loss. (Forest cover gain mainly shows areas where trees are =
growing back after clearcutting.) It is very detailed if one =
=E2=80=9Czooms in=E2=80=9D to a particular owl survey area.
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http://www.globalforestwatch.org/map/8/44.88/-63.20/ALL/grayscale/loss,fo=
restgain?tab=3Danalysis-tab =
<http://www.globalforestwatch.org/map/8/44.88/-63.20/ALL/grayscale/loss,f=
orestgain?tab=3Danalysis-tab&begin=3D2001-01-01&end=3D2016-01-01&threshol=
d=3D30&dont_analyze=3Dtrue> =
&begin=3D2001-01-01&end=3D2016-01-01&threshold=3D30&dont_analyze=3Dtrue
=20
I am guessing that Bird Studies Canada owl census data is available to =
anyone from past years. It would make a good project to analyse owl =
populations based on forest cover. =20
=20
Dr Bondrup-Neilson recently pointed out a long-standing false theory =
that when habitat is destroyed the displaced wildlife simply move =
=E2=80=9Csomewhere else=E2=80=9D. This was likely never true, as =
habitat niches tend to be already filled (even back in the days when we =
had much more forest). The displaced species has to compete with =
individuals of the same species who are already living there and =
well-established. The displaced species has to learn where the new food =
supply is, a new landscape, etc. Often times, a slow death to displaced =
wildlife takes place, as they starve/cannot find required shelter. Even =
more upsetting is that Nova Scotia is running out of =E2=80=9Csomewhere =
else=E2=80=9D, as forests are being felled night and day, both on Crown =
and on private land.
=20
On the up side, Bernard Forsythe demonstrated with barred owls that they =
can manage very well in remnant forest patches when a suitable cavity is =
found (his nest boxes). But imagine if we must mitigate for all the =
displaced species out there across the landscape. It=E2=80=99s easier =
to maintain forest cover across our landscape than build homes and find =
food for moose, goshawks, saw-whets, bay-breasted warblers, etc. =
We=E2=80=99re taking too much away.
=20
Donna Crossland
(I didn=E2=80=99t mean to make this into a solemn Sunday sermon!)
=20
=20
=20
From: naturens-owner@chebucto.ns.ca =
[mailto:naturens-owner@chebucto.ns.ca] On Behalf Of chris kennedy
Sent: May-06-17 11:44 PM
To: naturens@chebucto.ns.ca
Subject: Re: [NatureNS] owl decline linked to forest decline
=20
I run my owl route (Route NS#016) through an area north of Upper =
Stewiacke on the Pembroke Road. The cutting around that area has been =
intense, I implore anyone to look at the google earth imagery. No owls, =
I typically get one barred owl, it's never been a very populated route =
in the 4 years I've run it.=20
=20
Chris Kennedy in Dartmouth
=20
On Sat, May 6, 2017 at 8:47 PM, Fred Schueler <bckcdb@istar.ca> wrote:
On 5/6/2017 5:52 PM, Donna Crossland wrote:
It would seem that if we obtain consistently low numbers of barred owls
in the clearcut landscapes compared to intact landscapes, then the owl
census data may support what we pretty much already deduce using some
common sense: barred owls and other owl species are forest dwellers and
cannot thrive in the current harvest regime that has overtaken this
province.
In my opinion, it=E2=80=99s time to start using _years_ of bird data for
something extremely useful: habitat protection, enhancing awareness of
forest harvest impacts on a range of bird species, demanding a silent
period for harvesting during nesting periods, etc.
* somebody should do the GIS on this, and hammer the authorities with =
the results. Owls are symbols of wisdom, so they'd be good totems for =
the folly of clearcut forestry techniques.
fred.
------------------------------------------------------------
Frederick W. Schueler & Aleta Karstad
Daily Paintings - http://karstaddailypaintings.blogspot.com/
Vulnerable Watersheds - http://vulnerablewaters.blogspot.ca/
Mudpuppy Night in Oxford Mills - http://pinicola.ca/mudpup1.htm
RR#2 Bishops Mills, Ontario, Canada K0G 1T0
on the Smiths Falls Limestone Plain 44* 52'N 75* 42'W
(613)258-3107 <tel:%28613%29258-3107> <bckcdb at istar.ca> =
http://pinicola.ca/
------------------------------------------------------------
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