[MAIPC] Literature on impacts of invasive plants on game wildlife?

Sat Mar 9 18:38:44 PST 2019

This is a anecdotal and so apologies for that, but here is a striking
impact I heard related to fisheries. In roughly south-central PA, Japanese
Knotweed spread along some of the river systems. (As you may know, JK
propagules are readily spread downstream by river flooding events.) The
upshot was that impenetrable growths of tall JK along the river banks were
destroying fly fishing opportunities along these rivers. Needless to say,
this was grabbing the attention of the local fishers in a big way! I
suspect it may not be too hard to research this and find some articles that
might be useful. Cheers, Steve Young, Arlington VA

On Sat, Mar 9, 2019, 5:22 PM Susan Gitlin <
susan.mclaughlin at alumni.stanford.edu> wrote:

> Yes, thanks,everyone.  I have heard Dr. Tallamy speak on numerous
> occasions.  His contributions to the connections between native plants and
> the animals in our ecosystems have been wonderful.  Let's not, as a group,
> however, further contribute to the public's confusion between invasive
> plants and native plants.   I find myself often in the position of
> clarifying the difference between the two.    Advocacy on both is important
> to ecosystem protections, but invasive plants are not the opposite of
> native plants.
>
> In any case, at this point, I have not come across literature on the
> impact of invasive plants and game species.  Please do let me know if you
> hear of any studies!  Thank you!
>
> On Sat, Mar 9, 2019 at 5:06 PM Carol Larson <carol2339 at verizon.net> wrote:
>
>> Dr. Tallamy will speak at the Arden Gild Hall on April 22 at 7:00 pm.
>> Northern Delaware.
>>
>>
>>
>> *From:* MAIPC <maipc-bounces at lists.maipc.org> *On Behalf Of *Susan Gitlin
>> *Sent:* Friday, March 8, 2019 1:12 PM
>> *To:* Conner McBane <cmcbane at appalachiantrail.org>
>> *Cc:* MAIPC Listserve <maipc at lists.maipc.org>; Alonso Abugattas <
>> Aabugattas at arlingtonva.us>
>> *Subject:* Re: [MAIPC] Literature on impacts of invasive plants on game
>> wildlife?
>>
>>
>>
>>
>> Thanks, Conner.  Your last sentence speaks to the reason that I posed
>> this question.
>>
>>
>>
>> I spend a lot of time removing autumn olive, stiltgrass, Japanese
>> honeysuckle, etc etc from my property along the Maury River in Rockbridge
>> County.
>>
>> But the property is in the floodplain and the river can bring seeds of
>> invasive plants from upstream properties, thus undoing my work.  Many
>> property owners do not know about the problems that invasives cause, or
>> they simply do not have the interest or resources to remove them.  Given
>> that hunting and fishing are extremely popular activities in that area, I
>> wondered about the possibility of creating incentives, or at least engaging
>> in an educational campaign, based on the impact of invasive plants on those
>> activities -- if such an impact has been established.  Thus, I am looking
>> for information on that connection.
>>
>>
>>
>> --Susan.
>>
>>
>>
>> On Fri, Mar 8, 2019 at 12:32 PM Conner McBane <
>> cmcbane at appalachiantrail.org> wrote:
>>
>> Hi Susan,
>>
>>
>>
>> Dr. Tallamy makes great points on invasive plants impacts to birds
>> specifically. Breeding season for bird species requires heavy protein
>> sources from caterpillars whose greatest population diversity and size are
>> found on native plants. Clutch size is dependent on these high protein
>> sources. Invasive plant species do not have the diversity in insects and so
>> this causes a lack of protein for bird reproduction Many invasive species
>> such as umbellata do not fruit until well after breeding season so while
>> the fruit might still be utilized by bird species, it is not useful for
>> overall population growth. As you know, native species can and have
>> provided the fruit needed for migration so umbellata is not supplementing
>> any needed food source.
>>
>>
>>
>> This might be more specific to non-game migratory bird species but I
>> assume similar cases can be made for game species.
>>
>>
>>
>> This is a great question though and I think NNIS impacts to wildlife is a
>> really important selling point to the public for NNIS management.
>>
>>
>>
>> Best,
>>
>>
>> On Mar 7, 2019, at 6:10 PM, Susan Gitlin <
>> susan.mclaughlin at alumni.stanford.edu> wrote:
>>
>> Rick, can you by any chance point to specific studies that Dr. Tallamy
>> has done?  I am aware of his work on the relationship between native plants
>> and Lepidoptera (whose caterpillars are eaten by birds), but I'm not aware
>> of his work on the impacts of invasive plants on birds.  Thank you!
>>
>>
>>
>> On Thu, Mar 7, 2019 at 6:05 PM Richard Johnstone <ivmpartners at gmail.com>
>> wrote:
>>
>> I'm not sure about game species, but Dr. Doug Tallamy, UD, has great
>> research on the effects on native birds.
>>
>> Rick
>>
>>
>>
>> On Thu, Mar 7, 2019 at 5:16 PM Susan Gitlin <
>> susan.mclaughlin at alumni.stanford.edu> wrote:
>>
>> Hi.  Would any of you happen to have written or otherwise know of
>> articles regarding net actual or potential impacts of invasive plants on
>> Virginia game species?  I say "net" because many people will argue, and
>> rightfully, that plants like *Elaeagnus umbellata *are a food source for
>> wildlife.  The impacts on biodiversity and reductions in native sources of
>> food may be less obvious in the shorter term.  I am wondering to what
>> degree the spread of invasive plants has or may impact hunting in Virginia
>> or nearby states over the long term.  Can you suggest any sources of
>> information?
>>
>>
>>
>> Thank you!
>>
>>
>>
>> --Susan Gitlin
>>
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