Annual and perennial life history strategies of Zostera marina populations under different light regimes

Kim, Seung Hyeon; Kim, Jong-Hyeob; Park, Sang Rul; Lee, Kun‐Seop

doi:10.3354/meps10899

Cited by 41 publications

(46 citation statements)

References 47 publications

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“…On the long term, clonal growth increased shoot density, increasing the vegetated area. This perennial meadow behaved as an annual meadow during extreme climate conditions, demonstrating the species's capacity to recover from large scale losses, via seedling recruitment, as similarly observed in other locations (Jarvis and Moore 2010, Kim et al 2014, Qin et al 2016). Most of all, it shows that the contribution of sexual and clonal propagation is a population trait that is very variable (Rafajlović et al 2017), and this plasticity plays a key role in population persistence despite catastrophic disturbance events.…”

Section: Discussionsupporting

confidence: 65%

Sexual reproduction vs. clonal propagation in the recovery of a seagrass meadow after an extreme weather event

et al. 2019

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Marine flowering plants can reproduce sexually and clonally, and the relative contribution of these two modes can be dependent on the environmental conditions. Zostera marina, a seagrass widely distributed in the northern hemisphere, can form annual and perennial meadows with different proportions of sexual versus clonal propagation depending on the environmental disturbance regime. We study the hypothesis that the contribution of sexual propagation varies during the recovery of a seagrass meadow. In this case study, we compare the proportion of sexual versus clonal propagation of a perennial Z. marina meadow before its disappearance due to winter storms and after recovery. Before disturbance, genotypic diversity was high, indicating frequent sexual reproduction events likely to create an abundant seed bank. Seedling germination allowed the population to recover after the extreme disturbance. As months passed, seedlings became rare and finally absent, giving place to adult shoots. In an advanced stage of colonization, the shoots colonized the area by vegetative growth, which lowered the genotypic diversity. Despite this reduction over time, the genotypic diversity of the new meadow is still high, demonstrating the importance of sexual reproduction in meadow recovery and persistence. Reproducción sexual vs. propagación clonal en la recuperación de una pradera marina después de un evento climático extremoResumen: Las plantas marinas con flores pueden reproducirse sexualmente y de manera clonal, y la contribución relativa de estos dos modos puede depender de las condiciones ambientales. La Zostera marina, una planta marina ampliamente distribuida en el hemisferio norte, puede formar praderas anuales y perennes con distintas proporciones de propagación sexual frente a clonación, según el régimen de perturbación ambiental. Estudiamos la hipótesis de que la contribución de la propagación sexual varía durante la recuperación de una pradera marina. En este estudio, comparamos la proporción de la propagación sexual versus clonal de una pradera de Z. marina perenne, antes de su desaparición debido a las tormentas de invierno y después de la recuperación. Antes de la perturbación, la diversidad genotípica era alta, lo que indicaba eventos frecuentes de reproducción sexual, lo que podría crear un banco de semillas abundante. La germinación de las plántulas permitió que la población se recuperara después de la perturbación extrema. A medida que pasaban los meses, las plántulas se volvían raras y finalmente se ausentaban, dando lugar a brotes adultos. En una etapa avanzada de colonización, los brotes colonizaron el área mediante crecimiento vegetativo, lo que disminuyó la diversidad genotípica. A pesar de esta reducción en el tiempo, la diversidad genotípica de la nueva pradera sigue siendo alta, lo que demuestra la importancia de la reproducción sexual en la recuperación y la persistencia de la pradera.Palabras clave: recuperación de la pradera; Zostera marina; diversidad genotípica; impacto; disturbio; característica de vida...

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Section: Discussionsupporting

confidence: 65%

Sexual reproduction vs. clonal propagation in the recovery of a seagrass meadow after an extreme weather event

et al. 2019

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“…van Lent and Verschuure, 1994) or in deep water where seagrasses are already close to their physiological limits (e.g. Kenworthy, 2000;Kim et al, 2014).…”

Section: Attribute 2: Meadow Formmentioning

confidence: 99%

Unravelling complexity in seagrass systems for management: Australia as a microcosm

Kilminster

McMahon

Waycott

et al. 2015

Science of The Total Environment

252

253

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“…Annual populations invest predominantly in sexual reproduction to survive as seeds during unfavourable periods and mainly occur in areas with frequent disturbance (e.g. ice-scour, strong storms or bird grazing) (Robertson & Mann 1984, van Lent & Verschuure 1994 or thermal stress causing a complete loss of biomass (Meling-López & Ibarra-Obando 1999, Kim et al 2014. As yet, there is no clear evidence for genetic differences between annual and perennial populations (Keddy & Patri quin 1978, Gagnon et al 1980, Ferber et al 2008, suggesting large phenotypic plasticity in allocation of energy to sexual versus clonal reproduction even within short geographical distances (Keddy & Patriquin 1978, Jarvis et al 2012, Kim et al 2014.…”

Section: Introductionmentioning

confidence: 99%

Life history events of eelgrass Zostera marina L. populations across gradients of latitude and temperature

Blok¹,

Olesen²,

Krause‐Jensen³

2018

Mar. Ecol. Prog. Ser.

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The wide distribution range of eelgrass Zostera marina L. encompasses a broad temperature gradient potentially affecting the timing of life history events (phenology), which may also change with global warming. We explored the temperature dependence of eelgrass phenology by analysing published studies reporting the timing of in situ flowering, seed maturation and seedling emergence across a range of latitude (26.8−56.8°N) and annual mean air temperature (6.4−23.7°C). The timing of events changed significantly along the latitude and temperature gradients, being delayed towards northern, colder locations. On average, an increase in annual mean temperature by 1°C advanced the formation of flowering shoots by 12 d and the maturation of seeds by 10.8 d. Seedlings from warmer locations tended to emerge in autumn, whereas coldwater seedlings did not appear until late winter or early spring resulting in an overall advancement of 9.7 d per 1°C increase in annual temperature. The mean monthly temperature associated with specific life history events showed the strongest temperature specificity for maturation of seeds (range 13.5−20.2°C) and largest variability for the emergence of seedlings (range −1 to 20.2°C). Overall, increased latitude resulted in lower temperature thresholds for flowering, seed maturation and emergence of seedlings, indicating that such thresholds are subject to local adaptation or acclimation rather than being universal across the distribution range. Using a time-forspace approach, our results suggest that future warming will result in advanced timing of life history events of eelgrass and increased capacity for sexual reproduction at northern latitudes.

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Annual and perennial life history strategies of Zostera marina populations under different light regimes

Abstract: Resale or republication not permitted without written consent of the publisherAn eelgrass population near its maximum depth limit was reestablished by seedling recruitment (left), and nearly all the surviving seedlings flowered (right).

Cited by 41 publications

References 47 publications

Sexual reproduction vs. clonal propagation in the recovery of a seagrass meadow after an extreme weather event

Sexual reproduction vs. clonal propagation in the recovery of a seagrass meadow after an extreme weather event

Unravelling complexity in seagrass systems for management: Australia as a microcosm

Life history events of eelgrass Zostera marina L. populations across gradients of latitude and temperature

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