Transport of nutrients and organic matter in a mangrove swamp

Akamatsu, Yoshihisa; Ikeda, Syunsuke; Toda, Yuji

doi:10.1016/j.ecss.2009.01.026

Cited by 21 publications

(10 citation statements)

References 20 publications

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“…Lara and Dittmar (1999) and Dittmar and Lara (2001) showed that the outflow of nutrient-and organic matter-rich pore-and seepage water from the mangrove sediment into channel water in north Brazil led to characteristic tidal signatures with maximum concentrations during low tide. Akamatsu et al (2009) also found an inverse relationship between nutrient and organic matter concentrations and tidal height and highlighted the importance of groundwater flow for the nutrient budget in a mangrove system in Japan.…”

Section: Short-term Variations: Ecosystem Effects and Functionsmentioning

confidence: 91%

Tide- and rainfall-induced variations of physical and chemical parameters in a mangrove-depleted estuary of East Hainan (South China Sea)

Krumme

Herbeck

Tianci

2012

Marine Environmental Research

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Section: Short-term Variations: Ecosystem Effects and Functionsmentioning

confidence: 91%

Tide- and rainfall-induced variations of physical and chemical parameters in a mangrove-depleted estuary of East Hainan (South China Sea)

Krumme

Herbeck

Tianci

2012

Marine Environmental Research

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“…If the less likely but still conceivable second scenario of aquifer flow holds true, our results would similarly apply to other sites and many other coastal systems (Cooper Jr., 1959;Valiela et al, 1978;Johannes, 1980;Riedel et al, 2010). Akamatsua et al (2009) give an example of how subsurface advection beneath a mangrove forest generates a maximum in organic carbon at depth of 1 m.…”

Section: Discussionmentioning

confidence: 99%

Organic matter accumulation and degradation in subsurface coastal sediments: a model-based comparison of rapid sedimentation and aquifer transport

Holstein

Wirtz²

2010

Biogeosciences

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Abstract. The redox succession in shallow marine sediments generally exhibits a predictable pattern. Pore water profiles from a back barrier tidal flat in the German Wadden Sea depart from the expected redox zoning. Instead, a sulfate minimum zone associated with a sulfate-methane-sulfate double interface and a distinct ammonium peak at 1.5 m below sea floor (mbsf) is displayed. Such evidence for significant degradation of organic matter (OM) in subsurface layers is challenging our understanding of tidal flat biogeochemistry as little is known about processes that relocate reactive OM into layers far distant from the sediment-water interface. The objectives of our model study were to identify possible mechanisms for the rapid transport of organic matter to subsurface layers that cause the reversed redox succession and to constrain several important biogeochemical control parameters. We compared two scenarios for OM transfer: rapid sedimentation and burial of OM as well as lateral advection of suspended POM. Using a diagenetic model, uncertain process parameters, in particular those connected to OM degradation and (vertical or lateral) transport, are systematically calibrated using field data.We found that both scenarios, advection and sedimentation, had solutions consistent with the observed pore water profiles. For this specific site, however, advective transport of particulate material had to be rejected since the reconstructed boundary conditions were rather improbable. In the alternative deposition set-up, model simulations suggested the deposition of the source OM about 60 yrs before cores Correspondence to: J. M. Holstein (j.holstein@icbm.de) were taken. A mean sedimentation rate of approximately 2 cmyr −1 indicates substantial changes in near coast tidal flat morphology, since sea level rise is at a much lower pace. High sedimentation rates most probably reflect the progradation of flats within the study area. These or similar morphodynamic features also occur in other coastal areas so that inverted redox succession by horizontal or vertical transport may be more common than previously thought. Consequently, regional values for OM remineralization rates may be higher than predicted from surface biogeochemistry.

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“…Mangroves also enhance primary and secondary productivity of the coastal zone (Reef, Feller, & Lovelock, ; Robertson & Alongi, ). Nutrient exchanges between mangrove forests and coastal waters are influenced by the hydrology of ecosystems as materials are transported into and out of mangrove forests with tidal flows (Adame & Lovelock, ), or through non‐saline water movement from terrestrial ecosystems into tidally influenced systems (Akamatsu, Ikeda, & Toda, ; Maher, Santos, Golsby‐Smith, Gleeson, & Eyre, ; Wolanski, Mazda, & Ridd, ). However, the influence of different hydrological sources on mangrove primary production and growth dynamics are unknown, yet is critical information needed to support appropriate management of the coastal zone.…”

Section: Introductionmentioning

confidence: 99%

Groundwater enhances above‐ground growth in mangroves

et al. 2018

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Groundwater flow through coastal wetlands plays an important role in the maintenance of productivity of intertidal ecosystems. Groundwater can reduce salinity and increase nutrient availability which can enhance plant growth and alter plant biomass allocation patterns. Here, we used stable isotopes of oxygen and hydrogen to assess how groundwater influences below‐ground and above‐ground growth in the widespread mangrove species Avicennia marina. We found source water within tree stems varied seasonally, with non‐saline water use higher in the wet season when rainwater availability was highest compared to the dry season. Stems with higher proportional contribution of non‐saline water had increased above‐ground growth but no effect on below‐ground growth. Below‐ground growth was however influenced by nutrient availability across the intertidal zone which was higher in the high‐ compared to the low‐intertidal zone. Synthesis. This study shows that mangroves use non‐saline groundwater and rainwater when available rather than saline water sources. Groundwater flows into the intertidal stimulates organic matter accumulation in above‐ground biomass suggesting the availability of non‐saline water sources, such as groundwater and rainfall, are important for the growth and productivity of mangrove forests.

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Transport of nutrients and organic matter in a mangrove swamp

Cited by 21 publications

References 20 publications

Tide- and rainfall-induced variations of physical and chemical parameters in a mangrove-depleted estuary of East Hainan (South China Sea)

Tide- and rainfall-induced variations of physical and chemical parameters in a mangrove-depleted estuary of East Hainan (South China Sea)

Organic matter accumulation and degradation in subsurface coastal sediments: a model-based comparison of rapid sedimentation and aquifer transport

Groundwater enhances above‐ground growth in mangroves

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