Regeneration of nitrogen (15N) from seagrass litter in tropical Indo-Pacific meadows

Vonk, J. Arie; Stapel, J.

doi:10.3354/meps07619

Cited by 15 publications

(10 citation statements)

References 33 publications

(55 reference statements)

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“…Therefore the spatial distribution of δ 15 N in Z. noltei leaves is likely to be related to the δ 15 N of the NH4 + from pore waters, which mainly derives from the mineralization of organic matter generated by the seagrass detritus, epiphytes and other benthic organisms associated to the meadow (Holmer and Bachmann Olsen, 2002, Papadimitriou et al, 2006, Vonk and Stapel, 2008.…”

Section: Discussionmentioning

confidence: 99%

Seasonal Variability of the Carbon and Nitrogen Isotopic Signature in a Zostera noltei Meadow at the NW Iberian Peninsula

et al. 2018

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Nitrogen (N) and carbon (C) isotopic analyses in seagrasses have been established as effective environmental tracers to assess the anthropogenic influence on seagrass meadows. The aim of this study was to determine the spatial patterns and seasonal variability in the C and N stable isotopic composition of sediments, leaves and epiphytes at a Zostera noltei meadow in an intertidal complex located at the Ría de Vigo (NW Iberian Peninsula) and to explore the mechanisms underlying such variability.Measurements of carbon and nitrogen stable isotopes, morphological features of Z. noltei and the C:N mass ratios were undertaken monthly during an annual seasonal cycle. N recycling between the seagrass and the sediment under its canopy influenced the spatial and seasonal nitrogen isotopic variability in the Z. noltei meadow. The relative contribution of nitrogen stable isotopes both in Z. noltei and the sediments under its canopy showed significant seasonal differences. The seasonal variability observed in carbon and nitrogen stable isotopes and C:N mass ratios of Z. noltei was mainly explained by the physiological mechanisms of carbon and nitrogen uptake and the differential nutrient demand of the plant depending on the growth stage.

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Section: Discussionmentioning

confidence: 99%

Seasonal Variability of the Carbon and Nitrogen Isotopic Signature in a Zostera noltei Meadow at the NW Iberian Peninsula

et al. 2018

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“…The most oligotrophic location is the central northern region owing to weak mixing and limited nutrient flux [ 2 , 23 ]. However, in the south, nutrient-rich flux from the Indian Ocean compensates for oligotrophy [ 24 , 25 ]. It is important to notice that the marine ecosystem has a capacity to equilibrate different factors including the major nutrients [ 26 ].…”

Section: Introductionmentioning

confidence: 99%

Natural Products Repertoire of the Red Sea

et al. 2020

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Marine natural products have achieved great success as an important source of new lead compounds for drug discovery. The Red Sea provides enormous diversity on the biological scale in all domains of life including micro- and macro-organisms. In this review, which covers the literature to the end of 2019, we summarize the diversity of bioactive secondary metabolites derived from Red Sea micro- and macro-organisms, and discuss their biological potential whenever applicable. Moreover, the diversity of the Red Sea organisms is highlighted as well as their genomic potential. This review is a comprehensive study that compares the natural products recovered from the Red Sea in terms of ecological role and pharmacological activities.

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“…It has been reported that N in leaf tissue of turtle grass ( Thalassia testudinum ) increases as it consumes N from its environment (Sánchez et al ). Furthermore, Thalassia hemprichii , Halodule uninervis , and Cymodocea rotundata efficiently used N released from litterbags in their surroundings (Vonk & Stapel ). Interestingly, for the last two dates depletion of the isotopic signal was more pronounced in the reference site and BGS (approximately 3‰) compared to BGN, suggesting consumption of 15 N enriched material by the microbial community possibly due to diminished resources available to decomposers.…”

Section: Discussionmentioning

confidence: 99%

“…According to Vonk & Stapel () main processes responsible for changes in δ 15 N during litter decomposition include: (1) input of nonlitter N (i.e. microbial immobilization), (2) isotopic fractionation (by physicochemical processes), (3) consumption of 15 N enriched material by the microbial community, and (4) unequal labeling of the leaves or components (i.e.…”

Section: Discussionmentioning

confidence: 99%

Can ecosystem functional recovery be traced to decomposition and nitrogen dynamics in estuaries of the Lower Laguna Madre, Texas?

Marquez¹,

Fierro‐Cabo²,

Cintra-Buenrostro³

2016

Restoration Ecology

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The biggest incentive to attempt the restoration and protection of estuaries is their widely acknowledged ecological and economic importance. Assessing estuary health and recovery can most accurately come from examining ecosystem processes. The purpose of this study was to explore the potential of mass loss and nitrogen (N) dynamics during leaf litter decomposition, to detect signs of functional recovery in two estuarine systems in south Texas. Submerged litterbags with black mangrove (Avicennia germinans) leaves were retrieved at various dates over 320 days. Decomposition was about 50% slower in one of the recovering systems compared to a reference site. Nitrogen immobilization and release from decaying leaf litter also discriminated among sites. Nitrogen immobilization potentials ranged from 4.15 to 6.89 mgN/g leaf litter, with the reference site exhibiting the highest value and thus the highest potential to conserve N during litter decomposition. The reference site also had a N immobilization time twice as long as the recovering sites, and a slower net release after the immobilization, appearing again as the most conservative in this part of the N cycling, possibly pointing to a less disturbed, or more stable ecosystem. Overall, the N dynamics during decomposition of mangrove leaf litter were similar in both recovering sites, whereas the reference site had a more conservative nutrient dynamics with more N being retained for longer in decomposing litter, coupled with a slower net release. Metrics derived from N dynamics may provide a finer resolution assessment of functional recovery, than only decomposition metrics.

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Regeneration of nitrogen (15N) from seagrass litter in tropical Indo-Pacific meadows

Cited by 15 publications

References 33 publications

Seasonal Variability of the Carbon and Nitrogen Isotopic Signature in a Zostera noltei Meadow at the NW Iberian Peninsula

Seasonal Variability of the Carbon and Nitrogen Isotopic Signature in a Zostera noltei Meadow at the NW Iberian Peninsula

Natural Products Repertoire of the Red Sea

Can ecosystem functional recovery be traced to decomposition and nitrogen dynamics in estuaries of the Lower Laguna Madre, Texas?

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