Importance of water source in controlling leaf leaching losses in a dwarf red mangrove (Rhizophora mangle L.) wetland

Davis, Stephen E.; Childers, Daniel L.

doi:10.1016/j.ecss.2006.07.010

Cited by 17 publications

(11 citation statements)

References 32 publications

(12 reference statements)

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“…This rapid weight loss, which results from the high decomposition rate in the beginning of the experiment, is usually attributed to leaching of soluble compounds such as sugars, organic acids, proteins and phenols (Mfilinge et al, 2002;Davis et al, 2003Davis et al, , 2007Kristensen et al, 2008). This phase is normally marked by a more gradual decomposition (Ananda et al, 2008;Galeano et al, 2010) and is well recognized in the literature as a period of intense microbial action, when the N content increases (Robertson et al, 1988Wafar et al, 1997;Davis et al, 2007). This phase is normally marked by a more gradual decomposition (Ananda et al, 2008;Galeano et al, 2010) and is well recognized in the literature as a period of intense microbial action, when the N content increases (Robertson et al, 1988Wafar et al, 1997;Davis et al, 2007).…”

Section: Discussionmentioning

confidence: 99%

Leaf-litter decomposition of the mangrove speciesAvicennia schaueriana,Laguncularia racemosaandRhizophora mangle

Lima

Colpo

2013

J. Mar. Biol. Ass.

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This study evaluated the decomposition process of leaf litter from the main Brazilian mangrove species Avicennia schaueriana, Laguncularia racemosa and Rhizophora mangle. Senescent leaves were collected, dried and placed in nylon bags with different mesh sizes (fine: 2 × 2 mm and coarse: 8 × 8 mm). The bags were distributed over the sediment, and replicates of each species and mesh size were collected periodically over 4 months. In the laboratory, the dry weight of the samples was measured, and the decomposition coefficient (k) for each species and mesh size was obtained over time. All species showed a rapid decomposition rate at the beginning of the experiment, followed by a slower but steady rate of decomposition over time. The rate of leaf litter decomposition was highest in A. schaueriana, intermediate in L. racemosa and lowest in R. mangle. The difference was mainly linked to the activity and abundance of detritivores, together with the different litter quality of the species, which determined their palatability and probably influenced the decomposition process.

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Section: Discussionmentioning

confidence: 99%

Leaf-litter decomposition of the mangrove speciesAvicennia schaueriana,Laguncularia racemosaandRhizophora mangle

Lima

Colpo

2013

J. Mar. Biol. Ass.

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“…Red mangrove (R. mangle) roots in our study system have been shown to tap into groundwater at the peat-limestone interface (about 1 m deep; Ewe et al 2007). Davis and Childers (2007) showed that decomposition of mangrove litter increased water column TP in controlled experiments, but that this process was limited by the availability of labile carbon. Thus, groundwater P may first be "mined" by mangroves and then transferred to the aquatic system as senesced leaves where it is remineralized in ponds and creeks.…”

Section: Source Of Phosphorus To Taylor Rivermentioning

confidence: 98%

“…High water column total phosphorus (TP) in the ecotone during the dry season may be derived from a number of sources. Price et al (2006) show evidence for the discharge of high-P groundwater in the coastal Everglades, while Davis and Childers (2007) indicate internal recycling of P through biotic pathways. In addition, Caraco et al (1989) demonstrate the potential for abiotic release of P from estuarine sediments.…”

Section: Introductionmentioning

confidence: 96%

Hydrological Conditions Control P Loading and Aquatic Metabolism in an Oligotrophic, Subtropical Estuary

Koch

Childers

Stæhr

et al. 2011

Estuaries and Coasts

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Using high-resolution measures of aquatic ecosystem metabolism and water quality, we investigated the importance of hydrological inputs of phosphorus (P) on ecosystem dynamics in the oligotrophic, P-limited coastal Everglades. Due to low nutrient status and relatively large inputs of terrestrial organic matter, we hypothesized that the ponds in this region would be strongly net heterotrophic and that pond gross primary production (GPP) and respiration (R) would be the greatest during the "dry," euhaline estuarine season that coincides with increased P availability. Results indicated that metabolism rates were consistently associated with elevated upstream total phosphorus and salinity concentrations. Pulses in aquatic metabolism rates were coupled to the timing of P supply from groundwater upwelling as well as a potential suite of hydrobiogeochemical interactions. We provide evidence that freshwater discharge has observable impacts on aquatic ecosystem function in the oligotrophic estuaries of the Florida Everglades by controlling the availability of P to the ecosystem. Future water management decisions in South Florida must include the impact of changes in water delivery on downstream estuaries.

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“…In natural waters, this leaching process can be facilitated by the photochemical and/or microbial breakdown of the leaf's structural integrity. Although, during the initial few days of decomposition, microbial processing of R. mangle leaf litter can be relatively small compared with leaching (Davis and Childers, 2007). Yet, even if microbial processing of mangrove litter is low initially in natural waters, solar radiation can decompose the lignin of vascular plant litter resulting in the loss of structural integrity and enhancing leaching of dissolved organic matter (Vähätalo et al 1998).…”

Section: Cdom Production Patternsmentioning

confidence: 99%

Production of chromophoric dissolved organic matter from mangrove leaf litter and floating Sargassum colonies

Shank¹,

Lee

Vähätalo

et al. 2010

Marine Chemistry

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Importance of water source in controlling leaf leaching losses in a dwarf red mangrove (Rhizophora mangle L.) wetland

Cited by 17 publications

References 32 publications

Leaf-litter decomposition of the mangrove speciesAvicennia schaueriana,Laguncularia racemosaandRhizophora mangle

Leaf-litter decomposition of the mangrove speciesAvicennia schaueriana,Laguncularia racemosaandRhizophora mangle

Hydrological Conditions Control P Loading and Aquatic Metabolism in an Oligotrophic, Subtropical Estuary

Production of chromophoric dissolved organic matter from mangrove leaf litter and floating Sargassum colonies

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