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Hi all=2C=20
Queen Anne's lace and colt's foot are non-native. They originated overseas =
and were brought here by humans. Green crab and Phragmites are invasive. Th=
ey do better than native plants and choke out diversity. Phragmites=2C for =
example dominates ditches and waterways and does not allow for native catta=
ils to form stands. Cattails allow for diversity=2C rushes=2C etc. Pragmite=
s forms monospecific stands. Thus=2C non-native - not from around here. Inv=
asive - upsets the diversity and/or function of the system.=20
Interestingly=2C invasive plants thrive in to places that have been disturb=
ed by humans. In my opinion they are not cause but a symptom. Phragmites=2C=
is a hyperaccumulator=2C pulling compounds like metals and excess nutrient=
s up from the ground and storing them in its flesh. That is why it does so =
well along roadsides. It has a high tolerance for vehicle run-off. If harve=
sted and disposed - and controlled so it doesnt spread - of properly it is =
a great phytoremediator. Zebra mussels basically filtered and cleaned Lake =
Erie. It is dominated by the mussels but is no longer the most polluted of =
the lakes.=20
Invasive organisms do better in these ecosystems than the natives because w=
e have altered the ecosystem. That is what I mean by calling them a symptom=
.=20
:)Jen
From: randy.lauff@gmail.com
Date: Wed=2C 21 Mar 2012 16:38:54 -0300
Subject: Re: [NatureNS] Invasives
To: naturens@chebucto.ns.ca
I think the definition that Lance forwarded has a common mistake in it (not=
Lance's=2C but the original):
"defines invasive species as "... coming from other countries or regions an=
d moving outside their native habitat".
Too often I see the words "range" and "habitat" used interchangeably. Howev=
er=2C if I'm correct=2C then the second part of the definition put forward =
is redundant.=20
I will always look on House Sparrows and Dandelions and more as non-native =
species. The "individuals" which are here=2C are native=2C but that's not t=
he issue=3B the species do not belong here. "Invasive" in my mind=2C refers=
to the intensity of the foreign species' occupation. Hungarian Partridge a=
re not invasive here=2C though they still are alien=3B Japanese Bamboo is b=
oth.
Randy_________________________________
RF Lauff
Way in the boonies of
Antigonish County=2C NS.
=
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<div>Hi all=2C =3B</div><div><br></div>Queen Anne's lace and colt's foo=
t are non-native. They originated overseas and were brought here by humans.=
Green crab and Phragmites are invasive. They do better than native plants =
and choke out diversity. Phragmites=2C for example dominates ditches and wa=
terways and does not allow for native cattails to form stands. Cattails all=
ow for diversity=2C rushes=2C etc. Pragmites forms monospecific stands. Thu=
s=2C non-native - not from around here. Invasive - upsets the diversity and=
/or function of the system. =3B<div><br></div><div>Interestingly=2C inv=
asive plants thrive in to places that have been =3Bdisturbed =3Bby =
humans. In my opinion they are not cause but a symptom. Phragmites=2C is a =
hyperaccumulator=2C pulling compounds like metals and excess nutrients up f=
rom the ground and storing them in its flesh. That is why it does so well a=
long roadsides. It has a high tolerance for vehicle run-off. If harvested a=
nd disposed - and controlled so it doesnt spread - of properly it is a grea=
t phytoremediator. Zebra mussels basically filtered and cleaned Lake Erie. =
It is dominated by the mussels but is no longer the most polluted of the la=
kes. =3B</div><div><br></div><div>Invasive organisms do better in these=
ecosystems than the natives because we have altered the ecosystem. That is=
what I mean by calling them a symptom. =3B</div><div><br></div><div>:)=
</div><div>Jen<br><br><div><div id=3D"SkyDrivePlaceholder"></div><hr id=3D"=
stopSpelling">From: randy.lauff@gmail.com<br>Date: Wed=2C 21 Mar 2012 16:38=
:54 -0300<br>Subject: Re: [NatureNS] Invasives<br>To: naturens@chebucto.ns.=
ca<br><br>I think the definition that Lance forwarded has a common mistake =
in it (not Lance's=2C but the original):<div><br></div><div>"defines invasi=
ve species as "... coming from other countries or regions and moving outsid=
e their native habitat".
</div><div><br></div><div>Too often I see the words "range" and "habitat" u=
sed interchangeably. However=2C if I'm correct=2C then the second part of t=
he definition put forward is redundant. =3B</div><div>
<br></div><div>I will always look on House Sparrows and Dandelions and more=
as non-native species. The "individuals" which are here=2C are native=2C b=
ut that's not the issue=3B the species do not belong here. "Invasive" in my=
mind=2C refers to the intensity of the foreign species' occupation. Hungar=
ian Partridge are not invasive here=2C though they still are alien=3B Japan=
ese Bamboo is both.</div>
<div><br></div><div>Randy</div><div><br clear=3D"all">_____________________=
____________<br>RF Lauff<br>Way in the boonies of<br>Antigonish County=2C N=
S.<br><br><div class=3D"ecxgmail_quote"><blockquote class=3D"ecxgmail_quote=
" style=3D"border-left:1px #ccc solid=3Bpadding-left:1ex">
<br>
</blockquote></div><br></div></div></div> </div></body>
</html>=
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