Community Structure of Microphytobenthos Associated with Mangrove Ecosystems Along the Southwest Coast of India

Benny, Niya; Thomas, Lathika Cicily; Padmakumar, K. B.

doi:10.1007/s12237-020-00888-w

Cited by 8 publications

(1 citation statement)

References 35 publications

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“…Microeukaryotic community structure was related to the spatial heterogeneity of mangrove sediment geochemistry due to tidal zonation and the rhizosphere effect (Zhu et al, 2018). Significant seasonal variations of the microphytobenthos community structure were observed in mangrove ecosystems along the southwest coast of India (Benny et al, 2021). Salinity and nutrients were the most significant variables related to diatom composition in surface sediments of Can Gio Mangrove Forest, Southern Vietnam (Costa-Boddeker et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Effects of wetland, tide, and season on benthic biofilms and related sediment properties in mangrove ecosystems

Yang¹,

Yang²,

Luan

et al. 2022

Front. Mar. Sci.

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Sediment biofilms, mainly composed of diatoms, bacteria, and related extracellular polymeric substances (EPS), play important roles in mangrove ecosystems. In order to better understand the microbial biodiversity in marine environment, this study aims to clarify the effects of wetland, season, and tide on benthic biofilms and related sediment properties based on in situ investigation in two mangrove wetlands (Futian and Qi’ao) in the Pearl River Estuary, South China. Owing to the tide current, the northeastern Futian is more influenced by seawater than the southwestern Qi’ao. As a consequence of the salinity-driven accumulation of nutrients in sediments, Futian is more eutrophic than Qi’ao. Compared to Qi’ao, the higher nutrimental condition in Futian conserves higher abundance of eutrophic indicators of Nitzschia and Cyclotella, which results in higher values of all pigments and bound polysaccharide with varied monosaccharide composition. Compared to the seaward site, the landward site has higher abundance of benthic (pennate) diatoms but lower abundance of planktonic (centric) diatoms due to the varied settling velocity by tidal disturbance. This varied diatom composition leads to higher levels of bound polysaccharide and more monosaccharides in the landward site than in the seaward site. Compared to late spring (March), early summer (May) appears to have similar diatom abundance but more EPS fractions (except bound protein) and monosaccharides due to the higher level of light intensity and temperature. The observed lower bacterial abundance in May than in March might be due to the higher predation pressure. The baseline data on biofilm compositions in mangrove ecosystems from this study can improve the understanding of microbial biodiversity in response to the tidal, temporal, and spatial changes.

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Section: Introductionmentioning

confidence: 99%

Effects of wetland, tide, and season on benthic biofilms and related sediment properties in mangrove ecosystems

Yang¹,

Yang²,

Luan

et al. 2022

Front. Mar. Sci.

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Ephemeral analysis on microphytobenthos in an estuarine system along the southwest coast of India

Amal,

Benny,

Ajayakumar

et al. 2024

Aquat Ecol

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The Microphytobenthos are Abundant and Mediate Key Carbon Fluxes in Tropical Mangroves

Loo,

Ouyang,

Lai

et al. 2024

Estuaries and Coasts

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The microphytobenthos (MPB) are known to play important ecological roles in estuarine ecosystems. While tidal flat MPB are widely studied, mangrove MPB are often overlooked due to the common belief that the light-limited environment under the mangrove canopy is not conducive to MPB growth. We assessed the biomass and community characteristics of the MPB in two contrasting mangrove forests (silty substrate and brackish influence versus sandy substrate and oceanic influence), their seasonal photosynthetic performance, as well as their role in mediating porewater carbon flux. Biomass measured as chlorophyll a concentration indicated that MPB abundance was equal, if not higher, in mangroves than on tidal flats. While mangrove sediments fostered an equally rich assemblage of MPB (estimated 23 to 45 genera) as the adjacent tidal flat, the MPB genus composition was different across all habitats, sites, and seasons, indicating the strong environmental influence on MPB assemblages. This study identified porewater salinity, temperature, and pH, as well as irradiance level and surface soil temperature to be accountable for 23.5% of this variation. MPB in all sampling locations were dominated by pennate diatoms, while cyanobacteria were common in the estuarine (as opposed to oceanic) site. Compared to tidal flat MPB, mangrove MPB exhibited photosynthetic performance characteristic of lower light acclimation. A mesocosm experiment using enriched stable isotopes of carbon and nitrogen indicated that a tight coupling exists between mangrove-derived carbon and MPB. Mangrove MPB are abundant and different from tidal flat MPB, and are functional photosynthetic entities with a regulatory role in nutrient cycling in mangrove ecosystems.

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Community Structure of Microphytobenthos Associated with Mangrove Ecosystems Along the Southwest Coast of India

Cited by 8 publications

References 35 publications

Effects of wetland, tide, and season on benthic biofilms and related sediment properties in mangrove ecosystems

Effects of wetland, tide, and season on benthic biofilms and related sediment properties in mangrove ecosystems

Ephemeral analysis on microphytobenthos in an estuarine system along the southwest coast of India

The Microphytobenthos are Abundant and Mediate Key Carbon Fluxes in Tropical Mangroves

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