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

Krumme, Uwe; Herbeck, Lucia S.; Tianci, Wang

doi:10.1016/j.marenvres.2012.09.002

Cited by 35 publications

(18 citation statements)

References 24 publications

(33 reference statements)

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“…Hypoxic conditions (DO≤2 mg l −1 ; Diaz and Rosenberg 2008) were common in the subtidal area during LW and also occurred in the intertidal creeks at neap tide HWs when water exchange was limited due to small tidal amplitude and low current speeds (Mazda et al 1990), suggesting that the mid and upper reaches of the Sikao Creek regularly become hypoxic during neap tides. Hence, tidal mixing, especially at spring tides, ensures regular ventilation of the system (Table 2), similar to the mechanism found in a mangrove lagoon in Hainan, South China Sea (Krumme et al 2012). In fact, restricted habitat suitability was reflected in lower neap tide abundances of S. argus, Liza subviridis and Leiognathus fasciatus (<10 % of their total abundance), suggesting that an interaction of low inundation levels and hypoxic conditions restricted habitat suitability for some species during neap tides.…”

Section: Connectivity Between Intertidal and Subtidal Areassupporting

confidence: 63%

Tidal, diel and lunar patterns in intertidal and subtidal mangrove creek fish assemblages from southwest Thailand

et al. 2015

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Knowledge about short-term assembly patterns and connectivity in estuarine mangrove ichthyofauna from the Indo-West Pacific region is scant. We assessed tidal and diel dynamics of intertidal and subtidal fish assemblages in the mangrove forest of Sikao Creek, southwest (Andaman coast) Thailand. Over three lunar cycles, two intertidal creeks were blocked at high water according to the interaction of tidal and diel cycles; the adjacent subtidal area was seined at low waters. A total of 18,033 individuals (93 species, 36 families) were caught. Catch mass and abundances were dominated by small-sized fishes (intertidal creeks: Apogon hyalosoma, Ambassis interrupta, Ambassis vachellii; subtidal area: A. vachellii, Neostethus lankesteri, Oryzias javanicus, Siganus javus). Of 45 intertidal species, 78 % were also caught in the subtidal, suggesting close connectivity between the two habitat types. Overall intertidal fish biomass (0.3 g m −2 ) and density (0.03 fish m −2 ) were relatively low. Specific combinations of tidal magnitude and diel cycle explained recurring changes in intertidal fish assemblage structures, clearly observed at the species level, in the number of species, diversity, evenness and biomass. This pattern was strongly driven by new moon-night abundance maxima of dominant A. vachellii, which also displayed fullest stomachs at this lunar-diel cycle interaction. We suggest that estuarine mangrove fish studies of the Andaman Sea region

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Section: Connectivity Between Intertidal and Subtidal Areassupporting

confidence: 63%

Tidal, diel and lunar patterns in intertidal and subtidal mangrove creek fish assemblages from southwest Thailand

et al. 2015

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“…In this study, the pH value in rhizosphere environment ranged from 6.23 to 6.49, making the mangrove soils suitable environment for AHL substances or their producers. Furthermore, the high percentage of AHL-producing strains isolated in the present study could indicate that AHLs are strategically used in the rhizosphere niche to achieve competitive advantages, at least in the fluctuating mangrove habitats exposed to tidal cycles (Krumme et al, 2012). More detailed studies on the presence of AHL activity in cultivable bacteria in mangrove plants should be carried out and would likely add valuable information to the elucidation of the ecological importance of AHL-mediated micro-environmental processes in the wetland ecosystem (Romero et al, 2011).…”

Section: Discussionmentioning

confidence: 86%

Diverse Profiles of AI-1 Type Quorum Sensing Molecules in Cultivable Bacteria from the Mangrove (Kandelia obovata) Rhizosphere Environment

Lao

Jin

et al. 2016

Front. Microbiol.

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Mangrove rhizosphere environment harbors diverse populations of microbes, and some evidence showed that rhizobacteria behavior was regulated by quorum sensing (QS). Investigating the diverse profiles of QS molecules in mangrove ecosystems may shed light on the bacterial roles and lead to a better understanding of the symbiotic interactions between plants and microbes. The aims of the current study focus on identifying AI-1 type QS signals, i.e., acyl homoserine lactones (AHLs), in Kandelia obovata rhizosphere environment. Approximately 1200 rhizobacteria were screened and 184 strains (15.3%) tested were positive. Subsequent 16s rRNA gene sequencing and dereplication analyses identified 24 species from the positive isolates, which were affiliated to three different phyla, including Proteobacteria, Firmicutes, and Actinobacteria. Thin-layer chromatography separation of extracts revealed diverse AHL profiles and detected at least one active compound in the supernatant of these 24 cultivable AHL-producers. The active extracts from these bacterial isolates were further evaluated by ultra performance liquid chromatography-mass spectrometry, and the carbon side chain length ranged from C4 to C14. This is the first report on the diversity of AI-1 type auto-inducers in the mangrove plant K. obovata, and it is imperative to expand our knowledge of plant-bacteria interactions with respect to the maintenance of wetland ecosystem health.

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“…Annual rainfall is 1600–1800 mm, and approximately 80% of this precipitation falls during the wet season (May to October) [ Mao et al ., ]. The coast of this Island is subject to mixed semidiurnal microtides with typical tidal ranges <1 m and approximately 1.6 m during neap and spring tides, respectively [ Krumme et al ., ]. Four lagoons (Bamen Bay (a lagoonal inlet), Boao Lagoon, LY Lagoon, and XH Lagoon) along the east coast of Hainan Island were formed as a result of transgression during the Quaternary period [ Wang et al ., ].…”

Section: Study Sitementioning

confidence: 99%

Submarine groundwater discharge into typical tropical lagoons:Acase study in easternHainanIsland,China

Wang

2016

Geochem Geophys Geosyst

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Assessing submarine groundwater discharge (SGD) into lagoons and bays can be helpful to understand biogeochemical processes, especially nutrient dynamics. In the present paper, radium (Ra) isotopes were used to quantify SGD in two typical tropical lagoons (Laoye Lagoon (LY Lagoon) and Xiaohai Lagoon (XH Lagoon)) of eastern Hainan Island, China. The Ra mass balance model provided evidence that SGD plays an important role in the hydrology of the LY Lagoon and the XH Lagoon, delivering average SGD fluxes of 1.7 × 106 (94 L m−2 d−1) and 1.8 × 106 (41 L m−2 d−1) m3 d−1, respectively. Tidal pumping was one of the important driving forces for SGD fluxes in the LY and the XH Lagoons. Tidal‐driven SGD into the tidal channels of both lagoons can account for approximately 10% of the total SGD flux into the lagoons. In addition, the dissolved inorganic nutrient budgets were reassessed in the LY Lagoon and the XH Lagoon, which showed that SGD was the major source of nutrients entering the LY Lagoon and that the LY Lagoon behaved as a source for dissolved inorganic nitrogen (DIN) and dissolved inorganic phosphorus (DIP) and as a sink for dissolved silicate (DSi). Nutrient loads in the XH Lagoon were mainly derived from riverine inputs and SGD, and the XH Lagoon behaved as a source for DIP, but a sink for DIN and DSi.

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

Cited by 35 publications

References 24 publications

Tidal, diel and lunar patterns in intertidal and subtidal mangrove creek fish assemblages from southwest Thailand

Tidal, diel and lunar patterns in intertidal and subtidal mangrove creek fish assemblages from southwest Thailand

Diverse Profiles of AI-1 Type Quorum Sensing Molecules in Cultivable Bacteria from the Mangrove (Kandelia obovata) Rhizosphere Environment

Submarine groundwater discharge into typical tropical lagoons:Acase study in easternHainanIsland,China

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