eHALOPH - Halophytes Database

Publication Type	J
Authors	Kiswara, W; Behnke, N; Van Avesaath, P; Huiskes, AHL; Erftemeijer, PLA; Bouma, TJ
Author Full Name	Kiswara, W.; Behnke, N.; van Avesaath, P.; Huiskes, A. H. L.; Erftemeijer, P. L. A.; Bouma, T. J.
Title	Root architecture of six tropical seagrass species, growing in three contrasting habitats in Indonesian waters
Source	AQUATIC BOTANY
Language	English
Document Type	Article
Author Keywords	Root architecture; Oligotrophic; Tropical seagrass; Toplogical index; Root branching
Keywords Plus	SYSTEM ARCHITECTURE; TRADE-OFF; LIFE-SPAN; NUTRIENT RESORPTION; PERMEABLE SEDIMENTS; POSIDONIA-OCEANICA; ENHALUS-ACOROIDES; ORGANIC-MATTER; SOUTH SULAWESI; PRODUCTIVITY
Abstract	Although several recent studies point at the importance of seagrass roots for nutrient acquisition in oligotrophic tropical ecosystems, remarkably little is known about the root architecture of tropical seagrasses. The present study provides a detailed description of the root architecture of six seagrass species that were extracted from three sites differing in sediment type and nutrient availability (i.e., except for one species that was not present at one of the sites). Number of roots per node, order of root branching, length and diameter per root order, root hair density and length were determined and used to calculate a topological index for the different species and habitats. Root architecture differed strongly between species. The relatively long-lived and slowly-growing species Thalassia hemprichii and Enhalus acoroides were characterised by short internodes with relatively few unbranched roots per node and a high root hair density. More fast growing species such as Cymodocea rotundata, Cymodocea serrulata and Syringodium isoetifolium had many roots per node, the majority of which were branched. Surprisingly, differences in sediment type and nutrient availability, as present between locations, had little effect on root architecture. We expect this to be due to a relatively homogeneous nutrient distribution at the small scale within water saturated sediments. Overall, all seagrass species had relatively simple branching (topological index > 0.7), comparable to angiosperms of the low temperate salt marsh. We speculate that relatively simple root architecture of plants in flooded systems reflects the need for a minimal path length for oxygen transport from shoots to roots. (C) 2009 Published by Elsevier B.V.
Author Address	[Kiswara, W.; Behnke, N.; van Avesaath, P.; Huiskes, A. H. L.; Bouma, T. J.] Netherlands Inst Ecol NIOO KNAW, NL-4400 AC Yerseke, Netherlands; [Kiswara, W.] Indonesian Inst Sci, Res Ctr Oceanog, Ancol Timur Jakarta Utar, Indonesia; [Erftemeijer, P. L. A.] Deltares, NL-2600 MH Delft, Netherlands
Reprint Address	Bouma, TJ (reprint author), Netherlands Inst Ecol, Ctr Estuarine & Marine Ecol, POB 140, NL-4400 AC Yerseke, Netherlands.
E-mail Address	t.bouma@nioo.knaw.nl
ResearcherID Number	Bouma, Tjeerd/A-9841-2011; Huiskes, Ad/C-3252-2011; Van Avesaath, Pim/C-4266-2011
Funding Agency and Grant Number	WOTRO (The Netherlands Foundation for the Advancement of Tropical Research) [WT84-422]
Funding Text	This research was supported by WOTRO (The Netherlands Foundation for the Advancement of Tropical Research), grant number WT84-422. A. Arifin, and Asep Rasyidin are thanked for their valuable help during the field work. Sara Puijalon is thanked for her help in running the statistical analyses. Two anonymous reviewers are thanked for there valuable comments on a previous version of this manuscript. We like to especially thank the editor Jan Vermaat for his detailed comments that enabled us to significantly improve this MS. This is NIOO-KNAW publication number 4427.
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Cited Reference Count	57
Times Cited	18
Total Times Cited Count (WoS, BCI, and CSCD)	20
Publisher	ELSEVIER SCIENCE BV
Publisher City	AMSTERDAM
Publisher Address	PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
ISSN	0304-3770
29-Character Source Abbreviation	AQUAT BOT
ISO Source Abbreviation	Aquat. Bot.
Publication Date	APR
Year Published	2009
Volume	90
Issue	3
Beginning Page	235
Ending Page	245
Digital Object Identifier (DOI)	10.1016/j.aquabot.2008.10.005
Page Count	11
Web of Science Category	Plant Sciences; Marine & Freshwater Biology
Subject Category	Plant Sciences; Marine & Freshwater Biology
Document Delivery Number	425ZO
Unique Article Identifier	WOS:000264677200004
Plants associated with this reference	Cymodocea serrulata