Eelgrass seed dispersal via floating generative shoots in the Dutch Wadden Sea: a model approach

Erftemeijer, P.L.A.; Beek, J.K.L. van; Ochieng, Caroline; Jager, Z.; Los, Hans J.

doi:10.3354/meps07304

Cited by 57 publications

(51 citation statements)

References 33 publications

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“…Their seed-dispersal distance depends on the residence time of seeds rafting on the water surface, on the current speed (Harwell & Orth 2002, Boedeltje et al 2004, Erftemeijer et al 2008, Källström et al 2008, Coleman et al 2011a, and on the activity of seed consumers (Sumoski & Orth 2012). These mech-anisms can disperse seeds to a range of hundreds of kilometers and genetically connect separate populations (Kendrick et al 2012).…”

Section: Introductionmentioning

confidence: 99%

“…The seagrass Zostera marina has 2 seed dispersal modes: (1) short-distance dispersal around the parent population driven by the dominant force of gravity (Orth et al 1994) and (2) long-distance dispersal far from the parent population through rafting on the water surface (Harwell & Orth 2002, Erftemeijer et al 2008, Källström et al 2008, Kendrick et al 2012. The spathe (a component that includes seeds; Granger et al 2002), rhipidium (a group of spathes; Granger et al 2002, Harwell & Orth 2002, and reproductive shoot of Z. marina (Fig.…”

Section: Introductionmentioning

confidence: 99%

“…1A) are well-known diaspores for seed dispersal and are expected to experience different fates. Because these diaspores may have different dispersal mechanisms, they may have different roles in population dynamics, such as the establishment of new populations by rafting (Harwell & Orth 2002, Erftemeijer et al 2008, Källström et al 2008, Kendrick et al 2012 or the re-establishment of a population by short-distance seed dispersal (Plus et al 2003, Greve et al 2005, Lee et al 2007). However, if Z. marina were specialized for either long-or shortdistance seed dispersal, it would risk limiting the reestablishment of lost populations or the establishment of new populations, respectively.…”

Section: Introductionmentioning

confidence: 99%

“…Seed dispersal both near the parent plants and far from them would increase the chances of wide-ranging dispersal and reduce the risks resulting from limited seed-dispersal distance. However, because the dominant driving forces behind these dispersal mechanisms would be different-gravity for local dispersal (Orth et al 1994) and buoyancy for distant dispersal (Harwell & Orth 2002, Erftemeijer et al 2008, Källström et al 2008, Kendrick et al 2012) -we hypothesized that dispersal by either mechanism could be limited for an eelgrass bed at a calm site. To test this hypothesis, we determined the proportions of seeds dispersed via different diaspores, and the proportions of these diaspores with positive or negative buoyancy, in an eelgrass bed in Kurihama Bay.…”

Section: Introductionmentioning

confidence: 99%

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Seed dispersal in the seagrass Zostera marina is mostly within the parent bed in a protected bay

Hosokawa¹,

Nakaoka²,

Miyoshi³

et al. 2015

Mar. Ecol. Prog. Ser.

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Seed production and dispersal are key processes in plant population dynamics and gene flow. However, few quantitative studies have followed these processes in aquatic plants. We investigated the abundance of seeds produced and dispersed by the seagrass Zostera marina L. at a protected site within an enclosed bay. We also examined the buoyancy potential of seed dispersal units (diaspores) in the laboratory. Field observations showed that 31% of the total potentially produced seeds were dispersed as decayed reproductive shoots on the sea bottom of the parent bed, whereas 14% were dispersed in spathes (a component of reproductive shoots; seeds are contained inside) detached from live reproductive shoots. However, more than half of the dispersed spathes were negatively buoyant because of the weight of the ripe seeds they contained. Thus, < 6% of potentially produced seeds were dispersed by rafting away from the parent bed. The abundance of ripe seeds dispersed was comparable to that of seeds in the parent bed sediment. The fate of the remaining 54% of total potentially produced seeds was not detected, and they were assumed to be immature or to have been consumed by herbivores. Fewer than 5% of the dispersed seeds had germinated. Our results show that most seeds were dispersed within the parent bed, supporting one of the fitness-related seed-dispersal hypotheses, namely that dispersal mechanisms play a role in bed maintenance and increased genetic diversity.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Seed dispersal in the seagrass Zostera marina is mostly within the parent bed in a protected bay

Hosokawa¹,

Nakaoka²,

Miyoshi³

et al. 2015

Mar. Ecol. Prog. Ser.

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“…In order to simulate the propagule transport of different mangrove species, we used a generic advection-diffusion model that was originally developed to simulate the dispersal of eelgrass seeds via floating generative shoots (Erftemeijer et al, 2008). We have opted for the finite-volume method offered by Delft3D-WAQ, rather than a particle Table 1.…”

Section: Advection-diffusion Modelmentioning

confidence: 99%

Modelling drivers of mangrove propagule dispersal and restoration of abandoned shrimp farms

et al. 2013

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Propagule dispersal of four mangrove species Rhizophora mucronata, R. apiculata, Ceriops tagal and Avicennia officinalis in the Pambala–Chilaw Lagoon Complex (Sri Lanka) was studied by combining a hydrodynamic model with species-specific knowledge on propagule dispersal behaviour. Propagule transport was simulated using a finite-volume advection-diffusion model to investigate the effect of dispersal vectors (tidal flow, freshwater discharge and wind), trapping agents (retention by vegetation) and seed characteristics (buoyancy) on propagule dispersal patterns. Sensitivity analysis showed that smaller propagules, like the oval-shaped propagules of Avicennia officinalis, dispersed over larger distances and were most sensitive to changing values of retention by mangrove vegetation compared to larger, torpedo-shaped propagules of Rhizophora spp. and C. tagal. Directional propagule dispersal in this semi-enclosed lagoon with a small tidal range was strongly concentrated towards the edges of the lagoon and channels. Short distance dispersal appeared to be the main dispersal strategy for all four studied species, with most of the propagules being retained within the vegetation. Only a small proportion (max. 5%) of propagules left the lagoon through a channel connecting the lagoon with the open sea. Wind significantly influenced dispersal distance and direction once propagules entered the lagoon or adjacent channels. Implications of these findings for mangrove restoration were tested by simulating partial removal in the model of dikes around abandoned shrimp ponds to restore tidal hydrology and facilitate natural recolonisation by mangroves. The specific location of dike removal, (with respect to the vicinity of mangroves and independently suitable hydrodynamic flows), was found to significantly affect the resultant quantities and species of inflowing propagules and hence the potential effectiveness of natural regeneration. These results demonstrate the value of propagule dispersal modelling in guiding hydrological restoration efforts that aim to facilitate natural mangrove regeneration

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Long‐Distance Seed Dispersal

Schurr

Spiegel

Steinitz

et al. 2018

Annual Plant Reviews Online

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Most seeds of most plant species are dispersed over distances shorter than a few dozen metres, and only very few seeds travel over long distances. While the long‐distance dispersal (LDD) of seeds is, thus, typically rare, it has disproportionately large effects on the long‐term and large‐scale dynamics of plants. Here, we first highlight the importance of LDD for various aspects of plant biology, discuss problems with quantifying LDD, and advocate a new vector‐based framework for LDD research that may help to overcome some of these problems. We then present six generalizations about LDD mechanisms that can be derived using this framework. While the framework and the generalizations are also highlighted in Nathan, R., Schurr, F.M., Spiegel, O.,et al.(2008) Mechanisms of long‐distance seed dispersal.Trends in Ecology and Evolution23, 638–647, this chapter provides a more in‐depth derivation of the framework and additional evidence for the generalizations. In particular, we present here a new meta‐analysis validating an innovative model for the allometry of seed dispersal by animals. In the second part of the chapter, we extend Nathanet al.'s (2008) discussion of the implications of the framework and generalizations for understanding LDD evolution and forecasting large‐scale dynamics of plants. In particular, we use the vector‐based framework to address two fundamental questions about LDD: can we identify all relevant LDD vectors and can plant traits influence LDD? We conclude by suggesting directions for future research on LDD.

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Eelgrass seed dispersal via floating generative shoots in the Dutch Wadden Sea: a model approach

Cited by 57 publications

References 33 publications

Seed dispersal in the seagrass Zostera marina is mostly within the parent bed in a protected bay

Seed dispersal in the seagrass Zostera marina is mostly within the parent bed in a protected bay

Modelling drivers of mangrove propagule dispersal and restoration of abandoned shrimp farms

Long‐Distance Seed Dispersal

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