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

[Conner McBane]

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<mailto: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<mailto: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<mailto: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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