Impacts of Asiatic sand sedge on native plants and arbuscular mycorrhizal fungi in a barrier dune.

More About This Textbook

Overview

The recent expansion of the nonnative invasive Asiatic sand sedge (Carex kobomugi Ohwi) at East Beach State Park, Rhode Island, is reducing populations of the most important native, dune-building species and their associated arbuscular mycorrhizal fungi (AMF). In contrast to the native American beachgrass (Ammophila breviligulata Fern.) that is dependent upon AMF to thrive in nutrient-poor sand dunes, C. kobomugi does not form beneficial associations with the fungi. Furthermore, assessments suggest that the sedge is competitively superior in obtaining the essential nutrient phosphorous without AMF-facilitation. Analysis of data from transects of the dune system revealed significant negative correlations between distributions of C. kobomugi and A. breviligulata that are being extirpated. Percent cover of A. breviligulata was significantly reduced in areas of C. kobomugi. Other native plant species were not significantly reduced as a result of C. kobomugi expansion. Spore populations of AMF showed significant positive correlations with percent cover of A. breviligulata and significant negative correlations with percent cover of C. kobomugi. Mean spore abundance of AMF in areas of C. kobomugi was less than in areas dominated by A. breviligulata. The number of species of AMF was not significantly reduced as a result of C. kobomugi likely because of highly aggregated and infrequent distribution of some species' spores. Assessment of mycorrhizal inoculum potential (MIP) of soils taken from the field mirrored the spore-population data: mean root colonization of plants grown in field soil of C. kobomugi (12%--24%) was between three and five times lower than that of plants grown in field soil of A. breviligulata (55%--72%). This study was unique in quantifying the effect of an invasive species on populations of mycorrhizal fungi in a dune habitat. It was novel in assessing the reduction of native plant and fungi species by C. kobomugi in Rhode Island. The replacement of AMF-forming species on dunes by a species that does not form AMF (and support spore production by these obligately biotrophic fungi) will have serious consequences when attempts are made to re-establish native species in the sites that are eventually cleared of C. kobomugi.
Read More Show Less

Product Details

  • BN ID: 2940043601056
  • Publisher: ProQuest LLC
  • Sold by: Barnes & Noble
  • Format: eTextbook
  • Pages: 121
  • File size: 4 MB

Customer Reviews

Be the first to write a review
( 0 )
Rating Distribution

5 Star

(0)

4 Star

(0)

3 Star

(0)

2 Star

(0)

1 Star

(0)

Your Rating:

Your Name: Create a Pen Name or

Barnes & Noble.com Review Rules

Our reader reviews allow you to share your comments on titles you liked, or didn't, with others. By submitting an online review, you are representing to Barnes & Noble.com that all information contained in your review is original and accurate in all respects, and that the submission of such content by you and the posting of such content by Barnes & Noble.com does not and will not violate the rights of any third party. Please follow the rules below to help ensure that your review can be posted.

Reviews by Our Customers Under the Age of 13

We highly value and respect everyone's opinion concerning the titles we offer. However, we cannot allow persons under the age of 13 to have accounts at BN.com or to post customer reviews. Please see our Terms of Use for more details.

What to exclude from your review:

Please do not write about reviews, commentary, or information posted on the product page. If you see any errors in the information on the product page, please send us an email.

Reviews should not contain any of the following:

  • - HTML tags, profanity, obscenities, vulgarities, or comments that defame anyone
  • - Time-sensitive information such as tour dates, signings, lectures, etc.
  • - Single-word reviews. Other people will read your review to discover why you liked or didn't like the title. Be descriptive.
  • - Comments focusing on the author or that may ruin the ending for others
  • - Phone numbers, addresses, URLs
  • - Pricing and availability information or alternative ordering information
  • - Advertisements or commercial solicitation

Reminder:

  • - By submitting a review, you grant to Barnes & Noble.com and its sublicensees the royalty-free, perpetual, irrevocable right and license to use the review in accordance with the Barnes & Noble.com Terms of Use.
  • - Barnes & Noble.com reserves the right not to post any review -- particularly those that do not follow the terms and conditions of these Rules. Barnes & Noble.com also reserves the right to remove any review at any time without notice.
  • - See Terms of Use for other conditions and disclaimers.
Search for Products You'd Like to Recommend

Recommend other products that relate to your review. Just search for them below and share!

Create a Pen Name

Your Pen Name is your unique identity on BN.com. It will appear on the reviews you write and other website activities. Your Pen Name cannot be edited, changed or deleted once submitted.

 
Your Pen Name can be any combination of alphanumeric characters (plus - and _), and must be at least two characters long.

Continue Anonymously

    If you find inappropriate content, please report it to Barnes & Noble
    Why is this product inappropriate?
    Comments (optional)