Sedimentation within and among mangrove forests along a gradient of geomorphological settings

Adame, María Fernanda; Neil, D. T.; Wright, Sewall; Lovelock, Catherine E.

doi:10.1016/j.ecss.2009.10.013

Cited by 179 publications

(92 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…mineral matter) and a bias against collection of coarse and/or buoyant materials, including large fragments of plant litter. Second, a modified version of the filter paper method described by Reed (1989) and Adame et al (2010) was used to quantify passive sedimentation and litter accretion on the salt marsh surface. Preweighed 90 mm hydrophilic nylon filters (pore size 0.45 µm) were placed over 90 mm upturned plastic Petri dishes and attached to the salt marsh surface by two small staples, so that the nylon filter lay level with the surface.…”

Section: Sediment Trapsmentioning

confidence: 99%

Sediment and carbon deposition vary among vegetation assemblages in a coastal salt marsh

et al. 2017

View full text Add to dashboard Cite

Abstract. Coastal salt marshes are dynamic, intertidal ecosystems that are increasingly being recognised for their contributions to ecosystem services, including carbon (C) accumulation and storage. The survival of salt marshes and their capacity to store C under rising sea levels, however, is partially reliant upon sedimentation rates and influenced by a combination of physical and biological factors. In this study, we use several complementary methods to assess short-term (days) deposition and medium-term (months) accretion dynamics within a single marsh that contains three salt marsh vegetation types common throughout southeastern (SE) Australia.We found that surface accretion varies among vegetation assemblages, with medium-term (19 months) bulk accretion rates in the upper marsh rush (Juncus) assemblage (1.74 ± 0.13 mm yr −1 ) consistently in excess of estimated local sea-level rise (1.15 mm yr −1 ). Accretion rates were lower and less consistent in both the succulent (Sarcocornia, 0.78 ± 0.18 mm yr −1 ) and grass (Sporobolus, 0.88 ± 0.22 mm yr −1 ) assemblages located lower in the tidal frame. Short-term (6 days) experiments showed deposition within Juncus plots to be dominated by autochthonous organic inputs with C deposition rates ranging from 1.14 ± 0.41 mg C cm −2 d −1 (neap tidal period) to 2.37 ± 0.44 mg C cm −2 d −1 (spring tidal period), while minerogenic inputs and lower C deposition dominated Sarcocornia (0.10 ± 0.02 to 0.62 ± 0.08 mg C cm −2 d −1 ) and Sporobolus (0.17 ± 0.04 to 0.40 ± 0.07 mg C cm −2 d −1 ) assemblages. Elemental (C : N), isotopic (δ 13 C), mid-infrared (MIR) and 13 C nuclear magnetic resonance (NMR) analyses revealed little difference in either the source or character of materials being deposited among neap versus spring tidal periods. Instead, these analyses point to substantial redistribution of materials within the Sarcocornia and Sporobolus assemblages, compared to high retention and preservation of organic inputs in the Juncus assemblage. By combining medium-term accretion quantification with short-term deposition measurements and chemical analyses, we have gained novel insights into above-ground biophysical processes that may explain previously observed regional differences in surface dynamics among key salt marsh vegetation assemblages. Our results suggest that Sarcocornia and Sporobolus assemblages may be particularly susceptible to changes in sea level, though quantification of below-ground processes (e.g. root production, compaction) is needed to confirm this.

show abstract

Section: Sediment Trapsmentioning

confidence: 99%

Sediment and carbon deposition vary among vegetation assemblages in a coastal salt marsh

et al. 2017

View full text Add to dashboard Cite

show abstract

“…A concentração média do particulado sólido em suspensão de 157 mg L -1 foi superior à média de ecossistemas estuarinos australianos (117 mg L -1 ) estudados por Adame et al (2010) …”

Section: Resultsunclassified

“…A sedimentação é favorecida em manguezais, pois a vegetação atua como barreira natural contra as ações das marés, aumentando o armazenamento de material particulado (ADAME et al, 2010). Sendo assim, estudos utilizando sedimentos em suspensão são extremamente necessários para a avaliação de impactos ambientais em ecossistemas aquáticos.…”

unclassified

Relevância Dos Sedimentos Em Suspensão Para a Distribuição De Elementos Químicos No Rio Beberibe

Lyra¹,

Matos²,

França³

2017

Blucher Biophysics Proceedings

View full text Add to dashboard Cite

INTRODUÇÃOQuantidades expressivas de elementos químicos nos rios urbanos são liberadas por atividades antropogênicas e transportadas por grandes distâncias como material particulado em suspensão (OLLIVIER et al., 2011). A sedimentação é favorecida em manguezais, pois a vegetação atua como barreira natural contra as ações das marés, aumentando o armazenamento de material particulado (ADAME et al, 2010). Sendo assim, estudos utilizando sedimentos em suspensão são extremamente necessários para a avaliação de impactos ambientais em ecossistemas aquáticos. A metodologia da coleta é muito importante para a análise química de sedimentos em suspensão. A quantidade de sedimentos amostrados, a época de coleta e a ocorrência de eventos extremos (alta precipitação) podem contribuir significativamente para as frações de massa dos elementos químicos. França et al. (2010), por exemplo, encontraram composição química bastante variável para coleta de sedimentos em suspensão em diferentes pontos nas áreas urbanas e rurais do Rio Piracicaba. Este trabalho tem como objetivo quantificar Al, Br, Ca, Fe, K, Mn, Ni, Pb, Si, Sr, Ti e Zn no sedimento em suspensão do Rio Beberibe e demonstrar sua relevância para a distribuição de elementos químicos.

show abstract

“…Mangroves have a special growth environment that is mainly distributed in intertidal zones, which are constrained by topographic factors [20,21]. According to the integrated visual interpretation of the field investigations, Google Earth, the TM, and the ASTER DEM images, we found that mangroves were not distributed above 8 m elevation in the study areas.…”

Section: Feature Selectionmentioning

confidence: 94%

Multi-Feature Joint Sparse Model for the Classification of Mangrove Remote Sensing Images

Luo

Ouyang

Zhang

et al. 2017

IJGI

View full text Add to dashboard Cite

Abstract:Mangroves are valuable contributors to coastal ecosystems, and remote sensing is an indispensable way to obtain knowledge of the dynamics of mangrove ecosystems. Due to the similar spectral features between mangroves and other land cover types, challenges are posed since the accuracy is sometimes unsatisfactory in distinguishing mangroves from other land cover types with traditional classification methods. In this paper, we propose a classification method named the multi-feature joint sparse algorithm (MF-SRU), in which spectral, topographic, and textural features are integrated as the decision-making features, and sparse representation of both center pixels and their eight neighborhood pixels is proposed to represent the spatial correlation of neighboring pixels, which can make good use of the spatial correlation of adjacent pixels. Experiments are performed on Landsat Thematic Mapper multispectral remote sensing imagery in the Zhangjiang estuary in Southeastern China, and the results show that the proposed method can effectively improve the extraction accuracy of mangroves.

show abstract

Sedimentation within and among mangrove forests along a gradient of geomorphological settings

Cited by 179 publications

References 53 publications

Sediment and carbon deposition vary among vegetation assemblages in a coastal salt marsh

Sediment and carbon deposition vary among vegetation assemblages in a coastal salt marsh

Relevância Dos Sedimentos Em Suspensão Para a Distribuição De Elementos Químicos No Rio Beberibe

Multi-Feature Joint Sparse Model for the Classification of Mangrove Remote Sensing Images

Contact Info

Product

Resources

About