Occurrence of seasonal water replacement in mangrove soil and the trunk growth response of <i>Avicennia alba</i> related to salinity changes in a tropical monsoon climate

Komiyama, Akira; Poungparn, Sasitorn; Umnouysin, Suthathip; Rodtassana, Chadtip; Pravinvongvuthi, Tamanai; Noda, Takehiro; Kato, Shogo

doi:10.1111/1440-1703.12005

Cited by 25 publications

(36 citation statements)

References 44 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Mangroves utilize both freshwater and seawater for growth under natural conditions (Santini, Reef, Lockington, & Lovelock, 2015; Sternberg & Swart, 1987). Trunk growth of mangrove trees was accelerated in the rainy season when freshwater was abundant (Komiyama et al, 2019; Robert et al, 2014; Santini et al, 2015). In catchment basins, the largest source of freshwater is rainfall.…”

Section: Introductionmentioning

confidence: 99%

“…In such estuarine areas under monsoon climates, mangrove soils often show different levels of salinity between the dry and rainy seasons (for Florida, see Chen & Twilley, 1999; for French Guiana, see Marchand, Baltzer, Lallier–Vergés, & Albéric, 2004; for Bangladesh, see Chowdhury, De Ridder, & Beeckman, 2016). The relatively low salinity during the rainy season is due to freshwater discharge from rivers and rainfall (for Kenya, see Robert, Schmitz, Kirauni, & Koedam, 2009; for Thailand, see Komiyama et al, 2019). At this time, the frequency of inundation is a significant factor controlling soil salinity (for Australia, see Boto & Wellington, 1984; for Florida, see Chen & Twilley, 1999; for Mozambique, see Hogaune, Hill, Simpson, & Bowers, 1999; for Brazil, see da Cruz et al, 2013).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Daily inundation induced seasonal variation in the vertical distribution of soil water salinity in an estuarine mangrove forest under a tropical monsoon climate

Komiyama

Poungparn

Umnouysin

et al. 2020

Ecological Research

Self Cite

View full text Add to dashboard Cite

Previously, we revealed opposing patterns of the vertical distribution of soil water salinity between the dry and rainy seasons in an estuarine mangrove forest under a tropical monsoon climate. This study clarifies the causes of such seasonal variation in soil water salinity distribution. We investigated the salinity of inundating water, and diurnal changes in soil water salinity and water table levels. Freshwater inundated the study plot in the rainy season, while saline water inundated it in the dry season. At the Sonneratia, Avicennia and Rhizophora sampling sites, soil water salinity measured in experimental pits fluctuated diurnally. Mean salinity significantly decreased in the dry season but tended to increase in the rainy season. The effect of evaporation on salinity was negligible. Water table levels at all sites primarily fluctuated within 0–10 cm from the surface and were generally not synchronized with tidal movements. We divided the soil profile into a thin tide‐sensitive layer and an underlying aquifer layer based on soil water movement pattern. The inundating water saturated the tide‐sensitive layer and then gradually infiltrated into the aquifer layer. The water in the tide‐sensitive layer was partially replaced by subsequent inundation. The water in the aquifer layer was gradually desalinized or salinized, depending on the salinity level of the inundating water, although soil water from the former season remained still in deep soil horizons. Thus, seasonal variation of the vertical distribution of soil water salinity was induced by daily inundation and subsequent infiltration processes in the mangrove soil.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Daily inundation induced seasonal variation in the vertical distribution of soil water salinity in an estuarine mangrove forest under a tropical monsoon climate

Komiyama

Poungparn

Umnouysin

et al. 2020

Ecological Research

Self Cite

View full text Add to dashboard Cite

show abstract

“…The salinity-induced immobilization of mangrove OM almost reached its upper limit at salinity of around one-tenth of that of seawater [9]. On the other hand, high salinity can be a stress to mangroves and decrease its productivity [52]. Saline soils do not necessarily have favorable conditions for mangroves, although they may have suitable conditions to store OM from a geochemical viewpoint.…”

Section: Both Type Of Soils: Salinity-induced Immobilizationmentioning

confidence: 97%

“…Desorbed OM is susceptible to microbial degradation and eventually mineralized [38]. As mangrove soils experience daily and seasonal fluctuations in salinity [52], sorption-desorption properties of OM may be critical for its stability and warrant in-situ investigation.…”

Section: Mineral Soils: Interactions With Soil Minerals or Metalsmentioning

confidence: 99%

“…Hence, the role that salinity plays on C stabilization may be more important and spatiotemporally dynamic in vegetated coastal ecosystems including mangroves than in marine sediments. Although information on the spatiotemporal variation in salinity in mangrove soils is scarce, Komiyama et al recently observed that soil water salinity (up to 1 m depth) showed remarkable seasonal variation with salinity similar to that of seawater during the dry season and to that of freshwater during the rainy season in Trat mangrove forest, Thailand [52]. This fluctuation in salinity should affect soil C stabilization, for instance through dissolution and loss of OM under low salinity [79].…”

Section: Both Type Of Soils: Salinity-induced Immobilizationmentioning

confidence: 99%

See 1 more Smart Citation

Organic Carbon Stabilization Mechanisms in Mangrove Soils: A Review

Kida

Fujitake

2020

Forests

View full text Add to dashboard Cite

Despite the recognized organic carbon (OC) sequestration potential of mangrove forests, the ongoing climate change and anthropogenic disturbances pose a great threat to these ecosystems. However, we currently lack the ability to mechanically understand and predict the consequences of such impacts, primarily because mechanisms underlying OC stabilization in these ecosystems remain elusive. Research into OC stabilization has focused on terrestrial soils and marine sediments for decades, overlooking the vegetated coastal ecosystems including mangroves. In terrestrial soils and marine sediments, it is widely accepted that OC stabilization is the integrated consequence of OM’s inherent recalcitrance, physical protection, and interactions with minerals and metals. However, related discussion is rarely done in mangrove soils, and recalcitrance of roots and high net ecosystem production (high primary production and low heterotrophic respiration) have been considered as a primary OC sequestration mechanism in mangrove peat and mineral soils, respectively. This review presents the available information on the mechanisms underlying OC stabilization in mangrove soils and highlights research questions that warrant further investigation. Primary OC stabilization mechanisms differ between mangrove peat and mineral soils. In mangrove mineral soils, physico-chemical stabilization processes are important, yet grossly understudied OC stabilization mechanisms. In mangrove peat, recalcitrance of mangrove roots and the inhibition of phenoloxidase under the anoxic condition may be the primary OC stabilization mechanisms. Salinity-induced OC immobilization likely plays a role in both type of soils. Finally, this review argues that belowground production and allochthonous inputs in mangrove forests are likely underestimated. More studies are needed to constrain C budgets to explain the enigma that mangrove OC keeps accumulating despite much higher decomposition (especially by large lateral exports) than previously considered.

show abstract