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Authors Rajakaruna, N; Pope, N; Perez-Orozco, J; Harris, TB
Author Full Name Rajakaruna, Nishanta; Pope, Nathaniel; Perez-Orozco, Jose; Harris, Tanner B.
Title ORNITHOCOPROPHILOUS PLANTS OF MOUNT DESERT ROCK, A REMOTE BIRD-NESTING ISLAND IN THE GULF OF MAINE, USA
Source RHODORA
Language English
Document Type Article
Author Keywords coastal ecology; insular ecology; ecotypic differentiation; geobotany; heavy metals; nitrophilous plants; ornithocoprophilous plants; phytogeography
Keywords Plus PEMBROKESHIRE ISLANDS; MEDITERRANEAN ISLANDS; ALLOCHTHONOUS INPUT; NITROGEN DEPOSITION; SPECIES RICHNESS; NUTRIENT FLUXES; SEED DISPERSAL; HERRING-GULLS; N DEPOSITION; GREAT-LAKES
Abstract Plants growing on seabird-nesting islands are uniquely adapted to deal with guano-derived soils high in N and P. Such ornithocoprophilous plants found in isolated, oceanic settings provide useful models for ecological and evolutionary investigations. The current study explored the plants found on Mount Desert Rock (MDR), a small seabird-nesting, oceanic island 44 km south of Mount Desert Island (MDI), Hancock County, Maine, U.S.A. Twenty-seven species of vascular plants from ten families were recorded. Analyses of guano-derived soils from the rhizosphere of the three most abundant species from bird-nesting sites of MDR showed significantly higher (P < 0.05) NO3-, available P, extractable Cd, Cu, Pb, and Zn, and significantly lower Mn compared to soils from the rhizosphere of conspecifics on non-bird nesting coastal bluffs from nearby MDI. Bio-available Pb was several-fold higher in guano soils than for background levels for Maine. Leaf tissue elemental analyses from conspecifics on and off guano soils showed significant differences with respect to N, Ca, K, Mg, Fe, Mn, Zn, and Pb, although trends were not always consistent. Two-way ANOVA indicated a significant interaction between species and substrate for Ca, Mg, Zn, and Pb tissue accumulation, showing that for these four elements there is substantial differentiation among species found on and off of guano soil. A compilation of species lists from other important seabird-nesting islands in the region suggested an ornithocoprophilous flora for northeastern North America consisting of 168 species from 39 families, with Asteraceae (29 taxa; 17.3%), Poaceae (25 taxa; 14.9%), Polygonaceae (10 taxa; 5.95%), Caryophyllaceae (9 taxa; 5.4%), and Rosaceae (9 taxa; 5.4%) as the most species-rich families. The taxa were predominantly hermaphroditic (69%) and perennial (66%) species, native (60%) to eastern North America.
Author Address [Rajakaruna, Nishanta] San Jose State Univ, Dept Biol Sci, San Jose, CA 95192 USA; [Pope, Nathaniel; Perez-Orozco, Jose] Coll Atlantic, Bar Harbor, ME 04609 USA; [Harris, Tanner B.] Univ Massachusetts, Amherst, MA 01003 USA
Reprint Address Rajakaruna, N (corresponding author), San Jose State Univ, Dept Biol Sci, 1 Washington Sq, San Jose, CA 95192 USA.
E-mail Address nrajakaruna@gmail.com
ResearcherID Number Rajakaruna, Nishanta/I-7910-2012
ORCID Number Rajakaruna, Nishanta/0000-0002-9021-6918
Funding Agency and Grant Number Maine Space Grant Consortium; Maine Sea Grant; College of the Atlantic
Funding Text The authors thank Maine Space Grant Consortium, Maine Sea Grant, and College of the Atlantic for generous funding during the course of this study. We gratefully acknowledge the hospitality of Sean Todd, Kaitlin Palmer, Lillian Weitzman, and Courtney Vashro during our stay at the Edward McC. Blair Marine Research Station on MDR. We also thank Andrew Peterson and Elizabeth Monahon for providing safe transport to this remote island; Daniel Carpenter-Gold, Alex Luisi, and Ben Slepp for assistance in the field; Ian Blanchard and Kate Tompkins for soil and tissue sample preparation; Robert Bertin for sharing his dataset on plant sexual systems; Leslie Heimer and Apoorv Gehlot for assistance in the preparation of the figure, tables, and appendix; and two anonymous reviewers for providing useful comments.
Times Cited 10
Total Times Cited Count (WoS, BCI, and CSCD) 11
Publisher NEW ENGLAND BOTANICAL CLUB INC
Publisher City LAWRENCE
Publisher Address P.O. BOX 368, LAWRENCE, KS 66044 USA
ISSN 0035-4902
29-Character Source Abbreviation RHODORA
ISO Source Abbreviation Rhodora
Publication Date OCT-DEC
Year Published 2009
Volume 111
Issue 948
Beginning Page 417
Ending Page 447
Digital Object Identifier (DOI) 10.3119/08-12.1
Page Count 31
Web of Science Category Plant Sciences
Subject Category Plant Sciences
Document Delivery Number 560GC
Unique Article Identifier WOS:000274889100001
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