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Authors Triest, L; Thi, VT; Thi, DL; Sierens, T; Van Geert, A
Author Full Name Triest, Ludwig; Thi, Van Tran; Thi, Dinh Le; Sierens, Tim; Van Geert, Anja
Title Genetic differentiation of submerged plant populations and taxa between habitats
Source HYDROBIOLOGIA
Language English
Document Type Article; Proceedings Paper
Conference Title 12th International Symposium on Aquatic Weeds
Conference Date AUG 24-28, 2009
Conference Location Jyvaskyla, FINLAND
Conference Sponsors European Weed Res Soc
Author Keywords Ceratophyllum; Callitriche; Zannichellia; Potamogeton; ISSR; Microsatellites
Keywords Plus POTAMOGETON PECTINATUS L.; MICROSATELLITE MARKERS; CLONAL DIVERSITY; AQUATIC PLANT; DNA MARKERS; DISPERSAL; VARIABILITY; WATERFOWL; ECOLOGY; NUCLEAR
Abstract Ceratophyllum spp., Callitriche spp., Zannichellia spp. and Potamogeton pectinatus L. are widespread submerged macrophyte species, often occurring at high abundance and forming an integral part of the vegetation of many types of shallow aquatic systems. Several species occur in both freshwater and brackish water habitats. Most have a mixed reproduction system and can reproduce sexually by seeds and propagate asexually by rhizomes, turions, root tubers or axillary tubers. It is hypothesized that sexual propagules are more important than vegetative fragments to ensure long-distance-dispersal, which in case of frequent bird or water flow-mediated dispersal should lead to lowered genetic differentiation. At a regional level, we used dominant ISSR markers in a multi-species approach and observed the largest clonal differentiation between brackish water and freshwater populations of the western European lowland (Belgium). Differentiation was pronounced at taxon level (e.g. Zannichellia), as a salinity gradient (P. pectinatus) or as a coastal-to-inland conductivity gradient (Callitriche obtusangula). These differences and trends suggested a very limited dispersal at regional level across both habitats and regions. To test the hypothesis whether vegetative reproduction and dispersal may have an important function in maintenance of the species at local scale, we investigated the microsatellite diversity and clonal distribution within and between populations of P. pectinatus from a single catchment, representing upstream forest ponds and downstream river sites along the Woluwe (Brussels, Belgium). Clonal diversity was low on average, however, with a higher number of multilocus genotypes in upstream forest ponds than in downstream river sites. A few but abundant clones were present along various stretches of the river indicating clonal spread and establishment over larger distances within the river. Clonal dispersal at a local scale was more pronounced in river than in pond habitats, indicating a higher relative importance of water flow than bird-mediated dispersal for establishment of P. pectinatus in river sites. Dispersal of seeds and establishment of seedlings were assumed more effective within ponds than in river habitats. Upstream forest ponds can be regarded as source populations and refuges of clonal diversity for recolonization of the more stressful downstream river habitat.
Author Address [Triest, Ludwig; Thi, Van Tran; Thi, Dinh Le; Sierens, Tim; Van Geert, Anja] Vrije Univ Brussel, B-1050 Brussels, Belgium
Reprint Address Triest, L (corresponding author), Vrije Univ Brussel, Pl Laan 2, B-1050 Brussels, Belgium.
E-mail Address ltriest@vub.ac.be
ORCID Number Triest, Ludwig/0000-0002-4946-9614
Times Cited 21
Total Times Cited Count (WoS, BCI, and CSCD) 21
Publisher SPRINGER
Publisher City DORDRECHT
Publisher Address VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
ISSN 0018-8158
29-Character Source Abbreviation HYDROBIOLOGIA
ISO Source Abbreviation Hydrobiologia
Publication Date NOV
Year Published 2010
Volume 656
Issue 1
Beginning Page 15
Ending Page 27
Digital Object Identifier (DOI) 10.1007/s10750-010-0434-1
Page Count 13
Web of Science Category Marine & Freshwater Biology
Subject Category Marine & Freshwater Biology
Document Delivery Number 654PK
Unique Article Identifier WOS:000282180300003
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