Skip to Main Content
U.S. Forest Service
Caring for the land and serving people

United States Department of Agriculture

Home > Search > Publication Information

  1. Share via EmailShare on FacebookShare on LinkedInShare on Twitter
    Dislike this pubLike this pub
    Author(s): Ernesto Medina
    Date: 2018
    Source: Springer International Publishing
    Publication Series: Book Chapter
    Station: International Institute of Tropical Forestry
    PDF: Download Publication  (2.0 MB)

    Description

    Coastal plains of all tropical and subtropical latitudes are the habitat for a number of highly specialized plants able to establish in a range of sandy to clayey soils, submitted to periodical flooding from rainfall and tides, tolerant to large variations of salinity of soils interstitial water, withstanding coastal winds and sea-salt spray, and submitted to yearlong high solar irradiation and day temperatures. In northern South America semi-arid climates predominate in the southern Caribbean coasts from 10 to 15° N, an area that includes from the Goajira peninsula in Colombia to the Paria Peninsula in eastern Venezuela, and most southern Caribbean islands. The functional properties of mangroves (Laguncularia racemosa, Avicennia germinans) and associated halophytes (Conocarpus erectus, Sesuvium portulacastrum and Batis maritima) in seasonal arid coasts reveal the impact of highly seasonal distribution of rainfall affecting photosynthesis and leaf osmotic relations. The soil-plant nutritional relationships of a number of commonly occurring coastal species allowed the characterization of psammophytes and halophytes, based on the Na/K, and Ca/Mg ratios, and their preferential absorption of K over Na. Carbon 13 isotopic analyses showed the C4 species were well represented within the selected species (Sporobolus virginicus, Atriplex oestophora, Euphorbia mesembryathemifolia) but this photosynthetic metabolism is not the most common. Natural abundance of 15N indicates that sources of N are enriched in the heavier isotope suggesting that these coastal systems are limited by P but not by N. Mycorrhizal associations were common in most species but intensity of colonization was generally low. The occurrence of mycorrhizal associations in true halophytes remains to be assessed.

    Publication Notes

    • We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.

    Citation

    Medina, Ernesto. 2016. Physiological ecology of psammophytic and halophytic plant species from coastal plains in northern South America. In M. A. Khan, B. Boër, M. Ȫzturk, M. Clüsener-Godt, B. Gul, & S.-W. Breckle (Eds.), Sabkha Ecosystems Volume V: The Americas,tasks for vegetation science 48 (Vol. 48, pp. 29-56). Switzerland: Springer International Publishing. Doi: https://doi.org/10.1007/978-3-319-27093-7_3.

    Cited

    Google Scholar

    Keywords

    Halophytes, Intertidal zones, Mineral nutrients, Psammophytes, Salt-flats, Stable isotopes.

    Related Search


    XML: View XML
Show More
Show Fewer
Jump to Top of Page
https://www.fs.usda.gov/treesearch/pubs/56930