Individual-based genetic analyses support asexual hydrochory dispersal in Zostera noltei

Autor: Nelson C. Coelho, Ester A. Serrão, Licínia Gouveia, Buga Berković, Filipe Alberto
Jazyk: angličtina
Rok vydání: 2018
Předmět:
0106 biological sciences
Sexual Reproduction
Posidonia-Oceanica
Topography
lcsh:Medicine
Marine and Aquatic Sciences
Fresh Water
Plant Science
01 natural sciences
Seed Dispersal
lcsh:Science
Islands
Multidisciplinary
biology
Ecology
Organismal Cloning
Reproduction
Plant Anatomy
Zosteraceae
Paleogenetics
Seagrass
Seeds
Reproductive Cloning
Halophila-Johnsonii
Biological Cultures
Ria-Formosa
Research Article
Lagoons
Freshwater Environments
Seed dispersal
Modes of Reproduction
Marine Macrophyte
Research and Analysis Methods
010603 evolutionary biology
Propagule
Aquatic plant
Reproduction
Asexual
Seawater
14. Life underwater
Molecular Biology Techniques
Molecular Biology
Seagrass Cymodocea-Nodosa
Demography
Zostera noltei
Life-History
Landforms
Portugal
Plant Dispersal
010604 marine biology & hydrobiology
lcsh:R
Ecology and Environmental Sciences
Biology and Life Sciences
Paleontology
Aquatic Environments
Genetic Variation
Geomorphology
Sequence Analysis
DNA
Bodies of Water
biology.organism_classification
Sexual reproduction
Vegetative Fragments
Genetics
Population
Earth Sciences
Biological dispersal
lcsh:Q
Rhizome
Cloning
Developmental Biology
Zdroj: PLoS ONE
Repositório Científico de Acesso Aberto de Portugal
Repositório Científico de Acesso Aberto de Portugal (RCAAP)
instacron:RCAAP
PLoS ONE, Vol 13, Iss 8, p e0199275 (2018)
ISSN: 1932-6203
Popis: Dispersal beyond the local patch in clonal plants was typically thought to result from sexual reproduction via seed dispersal. However, evidence for the separation, transport by water, and re-establishment of asexual propagules (asexual hydrochory) is mounting suggesting other important means of dispersal in aquatic plants. Using an unprecedented sampling size and microsatellite genetic identification, we describe the distribution of seagrass clones along tens of km within a coastal lagoon in Southern Portugal. Our spatially explicit individual-based sampling design covered 84 km(2) and collected 3 185 Zostera noltei ramets from 803 sites. We estimated clone age, assuming rhizome elongation as the only mechanism of clone spread, and contrasted it with paleo-oceanographic sea level change. We also studied the association between a source of disturbance and the location of large clones. A total of 16 clones were sampled more than 10 times and the most abundant one was sampled 59 times. The largest distance between two samples from the same clone was 26.4 km and a total of 58 and 10 clones were sampled across more than 2 and 10 km, respectively. The number of extremely large clone sizes, and their old ages when assuming the rhizome elongation as the single causal mechanism, suggests other processes are behind the span of these clones. We discuss how the dispersal of vegetative fragments in a stepping-stone manner might have produced this pattern. We found higher probabilities to sample large clones away from the lagoon inlet, considered a source of disturbance. This study corroborates previous experiments on the success of transport and re-establishment of asexual fragments and supports the hypothesis that asexual hydrochory is responsible for the extent of these clones. Fundacao para a Ciencia e a Tecnologia, Portugal [PTDC/MAR/099887/2008]; Fundacao para a Ciencia e Tecnologia [SFRH/BD/68570/2010]
Databáze: OpenAIRE
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