Production dynamics of the eelgrass, Zostera marina in two bay systems on the south coast of the Korean peninsula

Lee, Kun‐Seop; Park, Sang Rul; Jung-Bae, Kim

doi:10.1007/s00227-005-0011-8

Cited by 102 publications

(92 citation statements)

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“…Underwater light reduction can be caused by algal blooms due to inputs of excess anthropogenic nutrients, as well as resuspension of bottom sediments and dredging (Orth and Moore 1983, Cambridge et al 1986, Onuf 1994. Water temperature has been also considered to be a major factor regulating seasonal seagrass growth, since temperature significantly affects the biochemical processes involved in photosynthesis and respiration (Phillips et al 1983, Lee and Dunton 1996, Lee et al 2005. Seagrass productivities usually show a distinct seasonal trend, increasing during spring and summer and decreasing during fall and winter (Vermaat et al 1987, Lee and Dunton 1996, Lee et al 2005.…”

mentioning

confidence: 99%

Growth dynamics of the seagrass, Zostera marina in Jindong Bay on the southern coast of Korea

Kim¹,

Kim²,

Kim³

et al. 2012

ALGAE

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Growth dynamics of the seagrass, Zostera marina were examined at the two stations (Myungju and Dagu) in Jindong Bay on the southern coast of Korea. Eelgrass leaf productivities, underwater irradiance, water temperature, dissolved inorganic nitrogen (DIN) in water column and sediments, and tissue carbon (C) and nitrogen (N) content were monitored monthly from March 2002 to January 2004. Underwater irradiance fluctuated highly without a clear seasonal trend, whereas water temperature showed a distinct seasonal trend at both study stations. Water column DIN concentrations were usually less than 5 μM at both study sites. Sediment pore water NH 4 + and NO 3 -+ NO 2 -concentrations were higher at the Myungju site than at the Dagu site. Eelgrass leaf productivity at both study sites exhibited a distinct seasonality, increasing during spring and decreasing during summer. Seasonal variation of eelgrass productivity was not consistent with seasonal patterns of underwater irradiance, or water temperature. Eelgrass tissue C and N content at both study sites also showed significant seasonal variations. Relationships between tissue C and N content and leaf productivities exhibited usually negative correlations at both study sites. These negative correlations implied that the growth of Z. marina at the study sites was probably limited by C and N supplies during the high growth periods.Key Words: growth dynamics; irradiance; nutrient availability; seagrass; temperature; tissue C and N content; Zostera marina INTRODUCTIONSeagrasses are known to play an important role as a primary producer in coastal and estuarine ecosystems (McRoy and McMillan 1977, Zieman and Wetzel 1980, Lee and Dunton 1996. Seagrasses can affect the coastal and estuarine environment by enhancing sedimentation and reducing current and wave energy (Fonseca 1989). Seagrasses also improve water qualities of coasts and estuaries by removing over-enriched inorganic nutrients through leaf uptake McRoy 1984, Lee andDunton 1999). Moreover, seagrass meadows provide habitats for commercially and ecologically valuable marine organisms (Holmquist et al. 1989, Montague andLey 1993). Since seagrass production is essential to support coastal and estuarine ecosystems, examination of seagrass growth dynamics is critical to understand functions and values of seagrass at a certain area in coastal and estuarine ecosystems.The primary productivity of seagrass is usually controlled by underwater irradiance, water temperature, and inorganic nutrient availabilities (Wetzel and Penhale Received July 20, 2012, Accepted August 14, 2012 *Corresponding Author E-mail: klee@pusan.ac.kr Tel: +82-51-510-2255+82-51-510- , Fax: +82-51-581-2962 This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. 216 be important factors for estimation of whole ...

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Growth dynamics of the seagrass, Zostera marina in Jindong Bay on the southern coast of Korea

Kim¹,

Kim²,

Kim³

et al. 2012

ALGAE

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“…Water temperature is strongly correlated with seasonal seagrass productivity (Lee et al 2005). Seagrass metabolism is sensitive to changes in temperature, specifically temperature increases (Collier et al 2011, Winters et al 2011.…”

Section: Temperaturementioning

confidence: 99%

“…Seagrasses at these lower latitudes, including the VCR, may experience a bimodal form of growth where optimal temperatures for growth occur in the spring and fall and reductions in growth occur in mid-summer due to high temperature stress, as seen with Zostera marina (Kenworthy et al 1982, Lee et al 2005, Lee et al 2007). With increased light attenuation through the water column, the optimal temperature for seagrass photosynthesis declines because of the high respiratory demands , Lee et al 2007.…”

Section: Temperaturementioning

confidence: 99%

“…With increased light attenuation through the water column, the optimal temperature for seagrass photosynthesis declines because of the high respiratory demands , Lee et al 2007. During the summer at shallow water depths, temperatures are higher than at deeper depths which increases the amount of light needed for growth (Lee et al 2005); however, because these plants are at shallower depths they may have enough light for growth even with high temperatures (Collier et al 2011). Reductions in light during the summer months can further increase the amount of stress on seagrasses, reducing growth (Lee et al 2007, Lee et al 2005.…”

Section: Temperaturementioning

confidence: 99%

“…When temperatures exceed 28°C, light requirements for Z. marina increase , Lee et al 2005. Because of this, it is important to consider changes in light requirements with increases in temperature.…”

Section: Light and Temperaturementioning

confidence: 99%

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Sustainable Seagrass Restoration in the Virginia Coastal Bays

Al‐Haj¹

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1Seagrass depth limits are important to consider when thinking about the future of coastal 2 ecosystems through climate change and nutrient loading scenarios. Seagrasses provide many 3 ecosystem services to coastal areas worldwide, including providing habitat for many 4 economically important species, acting as a significant carbon sink, and improving water quality. 5Because seagrasses are declining globally, it is important to be able to identify areas for 6 restoration where seagrasses could be successful in order to maximize use of time and money. 7Current models for the Virginia Coast Reserve (VCR) only consider effects of light and point 8 measurements of temperature on the maximum depth limit for eelgrass. However, it has been 9 shown that multiple factors can affect light requirements in plants such as sediment 10 characteristics and pore-water chemistry. Sediment characteristics, such as grain size and organic 11 matter content increase light requirements in plants by physically blocking light and decreasing 12 oxygen concentrations in the sediments allowing for the intrusion of phytotoxins such as pore-13 water sulfide and ammonium. With climate change causing a rise in global temperatures, 14 seagrasses will become even more sensitive to changes in their light environment, such as those 15 caused by coastal eutrophication, and will need to increase light requirements further to maintain 16 a positive carbon balance. This may affect depth limits in seagrasses by limiting their range for 17 growth at the minimum depth limit due to increases in temperature and at the maximum depth 18 limit due to declining light conditions with depth. Because the persistence of restoration projects 19 is dependent on the feedbacks between hydrodynamics, light attenuation, and temperature at the 20 meadow scale, it is important to consider the effects of light and temperature measurements over 21ii time in terms of other stressors such as pore-water chemistry and sediment characteristics to 22 accurately find the maximum and minimum depths for eelgrass growth. 23This thesis addresses how maximum and minimum depth limits change over an 24 environmental gradient of sediment grain size and organic matter content in the Virginia coastal 25 bays. The impact of changes in light attenuation in terms of water quality and temperature on 26 maximum and minimum depth limits was investigated through spatial analysis of field and 27 bathymetry data. The predicted depth ranges were compared to ranges of transplanted plants 28 along a depth gradient from 0.4 m to 2.0 m MSL (mean sea level) bracketing the known range 29 for eelgrass growth in Hog Island Bay, 0.8 m to 1.6 m MSL. I found that the maximum depth 30 limit for eelgrass growth can be predicted by light levels in areas with low pore-water sulfide 31 concentrations; however, in areas with high sediment pore-water sulfide concentrations there 32 may be a more complex interaction occurring where light requirements increase due to sulfide 33 intrusion. Predicting the minimum...

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Environmental drivers of flowering in the genus Zostera and spatio‐temporal variability of Zostera muelleri flowering in Australasia

Lekammudiyanse,

Saunders,

Flint

et al. 2024

Aquatic Conservation

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Seed‐based seagrass restoration strategies demand precise understanding of the environmental drivers influencing flowering. Flowering varies across diverse spatial and temporal scales, yet environmental drivers' effects on these dynamics have received less attention. Lack of knowledge regarding this life‐history stage limits the advancement of seed‐based restoration efforts, especially the establishment of shore‐based seagrass nurseries to enhance seed production. A systematic literature review on the flowering of the genus Zostera was conducted to develop a conceptual model that links influential environmental drivers with flowering. Additionally, a case study using existing survey data supplemented by additional field surveys was designed to explore the spatio‐temporal variability of flowering along the latitudinal gradient in Australasia for the species Zostera muelleri. Predictive models for flowering times were developed using regional climatic variables, following hypotheses generated from long‐term mesocosm observations. The review identified the direct and/or indirect effects of temperature, light, tidal variation, nutrients, salinity and grazing pressure on flowering dynamics. Four categories of flowering variables were identified based on their implications on restoration, namely, timing, abundance, the ratio between reproductive and vegetative growth and morphological characteristics. The spathe densities varied significantly among sites along the latitudinal gradient. While first (r2 = 0.71) and peak (r2 = 0.68) flowering times showed significant correlation with latitude, first flowering was equally predicted by mean winter air temperature and mean winter solar radiation (r2 = 0.73), whereas peak flowering time was best predicted by mean winter air temperature (r2 = 0.60). Accurate predictions of flowering times can improve conservation outcomes by enabling restoration practitioners to forecast flowering times and subsequent wild seed harvesting. The strong correlation between flowering times and climatic variables suggests future shifts in flowering times under climate change are likely, which is crucial knowledge for maintaining the contribution of restoration projects to seagrass conservation.

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Production dynamics of the eelgrass, Zostera marina in two bay systems on the south coast of the Korean peninsula

Cited by 102 publications

References 65 publications

Growth dynamics of the seagrass, Zostera marina in Jindong Bay on the southern coast of Korea

Growth dynamics of the seagrass, Zostera marina in Jindong Bay on the southern coast of Korea

Sustainable Seagrass Restoration in the Virginia Coastal Bays

Environmental drivers of flowering in the genus Zostera and spatio‐temporal variability of Zostera muelleri flowering in Australasia

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