Wetlands

, Volume 19, Issue 3, pp 705–708

The importance of propagule predation in a forest of nonindigenous mangrove trees

  • Orlo C. Steele
  • Katherine C. Ewel
  • Guillermo Goldstein
Note

DOI: 10.1007/BF03161706

Cite this article as:
Steele, O.C., Ewel, K.C. & Goldstein, G. Wetlands (1999) 19: 705. doi:10.1007/BF03161706

Abstract

Predation on propagules ofRhizophora mangle was compared in forests where this species is non-indigenous (Hawai’i, USA) and where it is native (American Samoa). Tree density and basal area of the non-indigenous stand were intermediate when compared to natural stands in other places whereRhizophora is common. Propagules were tethered on the forest floor at both sites for 14 days, predation was recorded, and survival rates of both attacked and control individuals were determined by placing them in a mist room. Mortality was significantly greater in American Samoa (x=25%) than in Hawai’i x=8%). The lower effectiveness of the non-indigenous predators in Hawai’i may help explain the unusually high rate at whichR. mangle propagules become established there.

Key Words

Rhizophora Bruguiera seed predation Hawai’i American Samoa basal area tree density 

Copyright information

© Society of Wetland Scientists 1999

Authors and Affiliations

  • Orlo C. Steele
    • 1
  • Katherine C. Ewel
    • 3
  • Guillermo Goldstein
    • 1
  1. 1.Department of BotanyUniversity of Hawai’t at ManoaHonoluluUSA
  2. 2.American Samoa Community College Land Grant ProgramPago PagoUSA
  3. 3.Pacific Southweset Research StationUSDA Forest ServiceHonoluluUSA