Benthic production, respiration and methane oxidation in Lobelia dortmanna lawns

Ribaudo, Cristina; Bertrin, Vincent; Jan, Gwilherm; Anschutz, Pierre; Abril, Gwénaël

doi:10.1007/s10750-016-2848-x

Cited by 18 publications

(20 citation statements)

References 62 publications

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“…By contrast, the O 2 concentration in the rhizosphere increases in light as a result of plant‐mediated sediment oxygenation resulting from photosynthesis. In darkness, less O 2 is released as no O 2 is produced by photosynthesis (Pedersen et al ., ; Sand‐Jensen et al ., ,b; Møller & Sand‐Jensen, ; Ribaudo et al ., ).…”

Section: Introductionmentioning

confidence: 99%

Dynamics of oxygen and carbon dioxide in rhizospheres of Lobelia dortmanna – a planar optode study of belowground gas exchange between plants and sediment

et al. 2018

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Root-mediated CO uptake, O release and their effects on O and CO dynamics in the rhizosphere of Lobelia dortmanna were investigated. Novel planar optode technology, imaging CO and O distribution around single roots, provided insights into the spatiotemporal patterns of gas exchange between roots, sediment and microbial community. In light, O release and CO uptake were pronounced, resulting in a distinct oxygenated zone (radius: c. 3 mm) and a CO -depleted zone (radius: c. 2 mm) around roots. Simultaneously, however, microbial CO production was stimulated within a larger zone around the roots (radius: c. 10 mm). This gave rise to a distinct pattern with a CO minimum at the root surface and a CO maximum c. 2 mm away from the root. In darkness, CO uptake ceased, and the CO -depleted zone disappeared within 2 h. By contrast, the oxygenated root zone remained even after 8 h, but diminished markedly over time. A tight coupling between photosynthetic processes and the spatiotemporal dynamics of O and CO in the rhizosphere of Lobelia was demonstrated, and we suggest that O -induced stimulation of the microbial community in the sediment increases the supply of inorganic carbon for photosynthesis by building up a CO reservoir in the rhizosphere.

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Section: Introductionmentioning

confidence: 99%

Dynamics of oxygen and carbon dioxide in rhizospheres of Lobelia dortmanna – a planar optode study of belowground gas exchange between plants and sediment

et al. 2018

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“…If we assume a carbon content of 39.5% in plant tissues (Carvalho et al, 2005) and consider the total measured biomass and the colonized surface on the four lakes, we can estimate that those two hydrophytes may fix from 84 to 264 g C m -2 (for HOU and PAR lakes, respectively). This value is comparable to the C sequestration capacity of other hydrophytes of the same lakes (Ribaudo et al, 2017), yet the proportion of vegetated areas is much different. Indeed, when considering the colonized areas by E. densa and L. major, we can estimate a productivity ranging between 18 and 1100 tons of C lake -1 at their standing crop (for CAZ and PAR lakes, respectively).…”

Section: Aquatic Weeds As Species Engineersmentioning

confidence: 54%

“…The eastern bottom is characterized by a very gentle slope while the western bottom presents a steep slope at the dunes' foot. These four lakes are classified from oligo-to mesotrophic and constitute the southern distribution limit for isoetid lawns in Europe (Cellamare et al, 2012;Bertrin et al, 2013;Ribaudo et al, 2017). The main uses of these lakes are recreational activities such as boating, bathing, hunting and angling during a limited part of the year.…”

Section: Study Areamentioning

confidence: 99%

“…Several sediment samples were also collected in bare areas of the prospected shores. Analyses of sedimentary bulk density, porosity, water content and organic matter (OM) content were performed according to standard procedures, as described in Ribaudo et al (2017).…”

Section: Sediment Characterizationmentioning

confidence: 99%

“…French Atlantic Lakes are characterized by slow-growing vegetation typical of acidic conditions and by low pelagic production (Cellamare et al, 2012;Ribaudo et al, 2017). If we assume a carbon content of 39.5% in plant tissues (Carvalho et al, 2005) and consider the total measured biomass and the colonized surface on the four lakes, we can estimate that those two hydrophytes may fix from 84 to 264 g C m -2 (for HOU and PAR lakes, respectively).…”

Section: Aquatic Weeds As Species Engineersmentioning

confidence: 99%

See 2 more Smart Citations

Effects of wind-induced sediment resuspension on distribution and morphological traits of aquatic weeds in shallow lakes

Bertrin¹,

Boutry²,

Jan³

et al. 2017

J Limnol

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The spread of invasive aquatic plants (i.e., aquatic weeds) requires a broader knowledge of the factors determining their settlement at the lake scale, in order to improve management practices and biomonitoring. Among hydrodynamic pressures, wave action might influence submerged vegetation distribution in shallow lakes and potentially engender modifications of plant morphological traits. We here report a field survey conducted between 2014 and 2015 in French Atlantic Lakes to assess the spatial distribution and biomass production of two rooted aquatic weeds, Egeria densa Planch. and Lagarosiphon major (Ridl.) Moss, in relation to wind-induced sediment resuspension, water depth and sedimentary features. Moreover, we explored the relation between plant morphological traits and hydrodynamic disturbance under in situ conditions. At the lake scale, E. densa and L. major formed extensive monospecific stands, and occurred in the same areas only at low biomass. Both monospecific and mixed stands preferentially developed in shallow-sheltered or deep-exposed areas. Plant morphological traits showed different patterns in function of sediment resuspension according to the species and the lake. The influence of resuspension was however not systematic, with many cases where morphological traits were not affected at all. Maximum stem length appeared to be the most correlated trait towards sediment resuspension. Moreover, we found a significant correlation between the biomass and the sedimentary organic matter, indicating an interaction between the organic substrate preference of the plants and the effect of the canopy on fine particles sedimentation. On the whole, we highlighted the link between plant distribution, phenotypic plasticity and sediment resuspension, with calm-water zones favouring the settlement of dense vegetated stands. Our study could thus contribute to improve prediction models for identifying suitable areas for potential colonization by aquatic weeds. Further research is needed to better understand the role played by hydraulic forces in structuring the habitats in shallow lakes.

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Dissolved methane concentrations and fluxes to the atmosphere from a tropical floodplain lake

et al. 2020

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Benthic production, respiration and methane oxidation in Lobelia dortmanna lawns

Cited by 18 publications

References 62 publications

Dynamics of oxygen and carbon dioxide in rhizospheres of Lobelia dortmanna – a planar optode study of belowground gas exchange between plants and sediment

Dynamics of oxygen and carbon dioxide in rhizospheres of Lobelia dortmanna – a planar optode study of belowground gas exchange between plants and sediment

Effects of wind-induced sediment resuspension on distribution and morphological traits of aquatic weeds in shallow lakes

Dissolved methane concentrations and fluxes to the atmosphere from a tropical floodplain lake

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