Distribution of benthic foraminifera upstream of the Elbe Estuary (Northern Europe): ecological interactions

2020 ◽  
Author(s):  
Fabio Francescangeli ◽  
Yvonne Milker ◽  
Eric Armynot du Châtelet ◽  
Gerhard Schmiedl
Keyword(s):  
Benthic Foraminifera ◽  
Agricultural Runoff ◽  
Organic Load ◽  
Northern Europe ◽  
Ecological Interactions ◽  
Elbe Estuary ◽  
Surface Sampling ◽  
Sediment Grain Size ◽  
Estuarine Area ◽  
Sediment Size

<p>Estuaries are transitional ecotones influenced by both marine and terrestrial (fresh) waters. For the past 200 years, estuarine environments experienced intense and rapid environmental degradations due to anthropogenic action (e.g., urban sewage, industry, aquaculture, and agricultural runoff). The distribution of benthic foraminifera in estuarine areas is the result of complex interactions between a large number of biotic and abiotic parameters. The natural stress (such as variation in salinity, sediment size, organic load) may be associated to anthropogenic stresses, enhancing the high natural variability of these areas. The objectives of the present work are to describe the specific composition of benthic foraminifera and to investigate their ecological interactions upstream of the Elbe Estuary (Germany). In this important estuarine area, there is a lack of a comprehensive investigation in terms of benthic foraminifera. So far, the ecology of living benthic foraminifera has not been studied in greater detail and it is largely unknown which species occur in this transitional area. For this purpose, a surface sampling was carried out from 24 stations along the salinity gradient of the Elbe Estuary. Living and dead foraminiferal assemblages were analyzed and the relative correlation with environmental parameters (such as salinity, pH, temperature, sediment size, organic matter) was investigated. Living assemblages are characterized by very low densities and largely dominated by “Ammonia” group. Dead assemblages are more diverse and dominated by estuarine taxa (Ammonia aomoriensis, Haynesina germanica, and Cribroelphidium selseyense). Upstream of the estuarine area, the low salinity prevents the development of living benthic foraminifera while downstream, sediment grain size seems to be a major key-factor, influencing foraminiferal distributions. This work sheds new light on benthic foraminiferal ecology and biodiversity of this important estuarine area of Northern Europe.</p>

Mineralogy of agglutinated benthic foraminifera; implications for paleo-environmental reconstructions

2008 ◽  
Vol 179 (6) ◽  
pp. 583-592 ◽  
Author(s):  
Eric Armynot du Chatelet ◽  
Philippe Recourt ◽  
Vincent Chopin
Keyword(s):  
Grain Size ◽  
Benthic Foraminifera ◽  
Tidal Marsh ◽  
Environmental Parameters ◽  
Mineralogical Composition ◽  
Test Construction ◽  
Taxonomic Composition ◽  
Tidal Elevation ◽  
Sediment Grain Size

Abstract Benthic foraminifera of recent salt marsh environments are often dominated by species with an agglutinated test. The grains used for test construction by these foraminifera are collected from their surrounding environment. In this study we investigate the role of sediment grain size and mineralogical composition for richness, population density and taxonomic composition of agglutinating foraminifera. Foraminifera from 15 stations of the tidal marsh of the Canche estuary (Pas-de-Calais, France) were studied. The species richness depends on the grain size of the sediment, whereas the density is not related to sediment grain size. The distribution of foraminifera species throughout the tidal marsh may depend on many environmental parameters such as OM as well as tidal elevation, already largely discussed in literature. The mineralogical composition of the agglutinated grains in Trochammina inflata and Arenoparrella mexicana is very different from that of sediment; the composition of Jadammina macrescens is generally different from that of the sediment with some exceptions, and in Miliammina fusca, Paratrochammina haynesi and Remaneica plicata the mineralogical compositions are similar to those of the sediment. The studied species may be able to select their preferred grains based upon composition even if a particular mineral is scarce in the sediment.

scholarly journals Universal relation with regime transition for sediment transport in fine-grained rivers

2019 ◽  
Vol 117 (1) ◽  
pp. 171-176 ◽  
Author(s):  
Hongbo Ma ◽  
Jeffrey A. Nittrouer ◽  
Baosheng Wu ◽  
Michael P. Lamb ◽  
Yuanfeng Zhang ◽  
...  
Keyword(s):  
Grain Size ◽  
Sediment Load ◽  
Yellow River ◽  
Fine Sand ◽  
Sediment Flux ◽  
Universal Relation ◽  
Sediment Grain Size ◽  
Fine Grained ◽  
Predictive Algorithm ◽  
Sediment Size

Fine-grained sediment (grain size under 2,000 μm) builds floodplains and deltas, and shapes the coastlines where much of humanity lives. However, a universal, physically based predictor of sediment flux for fine-grained rivers remains to be developed. Herein, a comprehensive sediment load database for fine-grained channels, ranging from small experimental flumes to megarivers, is used to find a predictive algorithm. Two distinct transport regimes emerge, separated by a discontinuous transition for median bed grain size within the very fine sand range (81 to 154 μm), whereby sediment flux decreases by up to 100-fold for coarser sand-bedded rivers compared to river with silt and very fine sand beds. Evidence suggests that the discontinuous change in sediment load originates from a transition of transport mode between mixed suspended bed load transport and suspension-dominated transport. Events that alter bed sediment size near the transition may significantly affect fluviocoastal morphology by drastically changing sediment flux, as shown by data from the Yellow River, China, which, over time, transitioned back and forth 3 times between states of high and low transport efficiency in response to anthropic activities.

Sediment (grain size and clay mineralogy) and organic matter quality control on living benthic foraminifera

2009 ◽  
Vol 52 (1) ◽  
pp. 75-84 ◽  
Author(s):  
Éric Armynot du Châtelet ◽  
Viviane Bout-Roumazeilles ◽  
Armelle Riboulleau ◽  
Alain Trentesaux
Keyword(s):  
Grain Size ◽  
Quality Control ◽  
Organic Matter ◽  
Benthic Foraminifera ◽  
Clay Mineralogy ◽  
Sediment Grain Size ◽  
Organic Matter Quality

scholarly journals CHARACTERISTIC OF SEDIMENT AT LEKOK COASTAL WATERS, PASURUAN REGENCY, EAST JAVA

2020 ◽  
Vol 12 (1) ◽  
pp. 235-246
Author(s):  
Rifka Rimbi Anggraini ◽  
Uun Yanuhar ◽  
Yenny Risjani
Keyword(s):  
Coastal Water ◽  
Coastal Waters ◽  
Sandy Loam ◽  
Gravimetric Method ◽  
Open Water ◽  
Silt Loam ◽  
Sediment Grain Size ◽  
Sediment Distribution ◽  
Sediment Size ◽  
Coastal Changes

Sedimentation is one of the dynamics that occur in coastal areas to determine the condition of the coast. Lekok coastal water is one of the open water areas that have very fluctuating dynamics in coastal changes. The structural study of sediment distribution conducted in this location is used to provide information about the process of transportation and sedimentation based on the distribution of sediment grain size. This study aims to determine the horizontal grain sediment size in the Lekok coastal waters. This research was conducted at nine sampling points by sampling in the form of primary sediments randomly using the grab sampler method. Furthermore, further analysis is done by the gravimetric method. Based on the results of the study note that sediments characteristic in Lekok coastal water are generally dominated by three types of sediments, namely: sandy loam, loam, and silt loam. Sorting values ​​are in a well-sorted to the moderately well-sorted condition where the sediment conditions are well sorted. The skewness value is skewed positively, where the value indicates a positive skewed sedimentary condition. The value of kurtosis is in the leptokurtic condition where the sediment from station 1 to station 9 is homogeneous.

scholarly journals Distribusi Foraminifera Bentonik Hidup dalam Hubungannya dengan Sedimen Dasar Laut di Selat Sumba, Nusa Tenggara Timur

2019 ◽  
Vol 20 (1) ◽  
pp. 17
Author(s):  
Purna Sulastya Putra ◽  
Septriono Hari Nugroho
Keyword(s):  
Benthic Foraminifera ◽  
Research Area ◽  
Carbonate Content ◽  
Sediment Characteristics ◽  
Coarse Silt ◽  
Sediment Grain Size ◽  
Sea Floor ◽  
Floor Surface ◽  
Sediment Types ◽  
Box Corer

Marine geological survey of Ekspedisi Widya Nusantara (EWIN) LIPI 2016 was conducted by using RV Baruna Jaya VIII in the Sumba Waters from 4 to 26 August 2016. One of the aim of this survey is to understand the sea floor surface sediment characteristics and its influence to the benthic foraminifera distribution. Seven sediment samples were collected from sea floor surface in Sumba Strait, at the different location and depth using grabbing method with box corer. The samples have analyzed for the foraminifera content, sediment grain size, organic matter and carbonate content, and chemical element by XRF method. The living benthic foraminifera distribution increase to the east of the research area, which have higher content of the organic material and Fe, Rb, Zr, Zn and Sr elements in the sediment. The benthic foraminifera distribution most abundance founded at the depth of 800-1000 m with sediment types are sandy coarse silt  to sandy very coarse silt.Keywords: Benthic foraminifera, distribution, sea floor sediment, Sumba Strait.

scholarly journals Distribusi Foraminifera Bentonik Hidup dalam Hubungannya dengan Sedimen Dasar Laut di Selat Sumba, Nusa Tenggara Timur

2019 ◽  
Vol 20 (1) ◽  
pp. 17
Author(s):  
Purna Sulastya Putra ◽  
Septriono Hari Nugroho
Keyword(s):  
Benthic Foraminifera ◽  
Research Area ◽  
Carbonate Content ◽  
Sediment Characteristics ◽  
Coarse Silt ◽  
Sediment Grain Size ◽  
Sea Floor ◽  
Floor Surface ◽  
Sediment Types ◽  
Box Corer

Marine geological survey of Ekspedisi Widya Nusantara (EWIN) LIPI 2016 was conducted by using RV Baruna Jaya VIII in the Sumba Waters from 4 to 26 August 2016. One of the aim of this survey is to understand the sea floor surface sediment characteristics and its influence to the benthic foraminifera distribution. Seven sediment samples were collected from sea floor surface in Sumba Strait, at the different location and depth using grabbing method with box corer. The samples have analyzed for the foraminifera content, sediment grain size, organic matter and carbonate content, and chemical element by XRF method. The living benthic foraminifera distribution increase to the east of the research area, which have higher content of the organic material and Fe, Rb, Zr, Zn and Sr elements in the sediment. The benthic foraminifera distribution most abundance founded at the depth of 800-1000 m with sediment types are sandy coarse silt  to sandy very coarse silt.Keywords: Benthic foraminifera, distribution, sea floor sediment, Sumba Strait. DOI: 10.33332/jgsm.2019.v20.1.17-26

scholarly journals Distribusi Foraminifera Bentonik Hidup dalam Hubungannya dengan Sedimen Dasar Laut di Selat Sumba, Nusa Tenggara Timur

2019 ◽  
Vol 20 (1) ◽  
pp. 17
Author(s):  
Purna Sulastya Putra ◽  
Septriono Hari Nugroho
Keyword(s):  
Benthic Foraminifera ◽  
Research Area ◽  
Carbonate Content ◽  
Sediment Characteristics ◽  
Coarse Silt ◽  
Sediment Grain Size ◽  
Sea Floor ◽  
Floor Surface ◽  
Sediment Types ◽  
Box Corer

Marine geological survey of Ekspedisi Widya Nusantara (EWIN) LIPI 2016 was conducted by using RV Baruna Jaya VIII in the Sumba Waters from 4 to 26 August 2016. One of the aim of this survey is to understand the sea floor surface sediment characteristics and its influence to the benthic foraminifera distribution. Seven sediment samples were collected from sea floor surface in Sumba Strait, at the different location and depth using grabbing method with box corer. The samples have analyzed for the foraminifera content, sediment grain size, organic matter and carbonate content, and chemical element by XRF method. The living benthic foraminifera distribution increase to the east of the research area, which have higher content of the organic material and Fe, Rb, Zr, Zn and Sr elements in the sediment. The benthic foraminifera distribution most abundance founded at the depth of 800-1000 m with sediment types are sandy coarse silt  to sandy very coarse silt.Keywords: Benthic foraminifera, distribution, sea floor sediment, Sumba Strait. DOI: 10.33332/jgsm.2019.v20.1.17-26

Latest Pleistocene Increase in Wind Intensity Recorded in Eolian Sediments from Central Alaska

1990 ◽  
Vol 34 (2) ◽  
pp. 160-168 ◽  
Author(s):  
Nancy Bigelow ◽  
Jim Begét ◽  
Roger Powers
Keyword(s):  
Grain Size ◽  
High Latitude ◽  
Sharp Increase ◽  
Younger Dryas ◽  
Ice Cores ◽  
Northern Europe ◽  
Sediment Grain Size ◽  
Climatic Fluctuations ◽  
Eolian Sediments ◽  
Wind Intensity

AbstractA brief increase in wind intensity between ca. 11,100 and 10,700 yr B.P. is recorded by a sharp increase in sediment grain size at eolian sections along the Nenana River in central Alaska. This occurred at the same time as the Younger Dryas climatic reversal in northern Europe and an increase in the vigor of atmospheric circulation recorded by Greenland ice cores. Climatic fluctuations in high latitude areas during Younger Dryas time may reflect variations in the CO2 content of the atmosphere.

scholarly journals Patterns of grain-size temporal variation of sediment transported by overland flow associated with moving storms: interpreting soil flume experiments

2011 ◽  
Vol 11 (9) ◽  
pp. 2605-2615 ◽  
Author(s):  
J. L. M. P. de Lima ◽  
P. A. Dinis ◽  
C. S. Souza ◽  
M. I. P. de Lima ◽  
P. P. Cunha ◽  
...  
Keyword(s):  
Grain Size ◽  
Overland Flow ◽  
Strong Relationship ◽  
Flume Experiments ◽  
Sediment Grain Size ◽  
Sediment Yields ◽  
Sediment Size ◽  
Size Evolution ◽  
Mean Grain Size ◽  
Recession Limb

Abstract. This study describes and interprets the evolution of grain-size distribution of sediment yields generated in an experimental soil flume subjected to downstream and upstream moving rain storms. Results of laboratory experiments show that downstream moving storms cause more soil loss than do upstream moving storms. The pattern of sediment grain-size evolution in time during a runoff event exhibits a clear dependence on the direction of storm movement. A strong relationship between overland flow discharge and mean sediment size is found. Nevertheless, the mean grain-size of sediments transported during the rising limb of the hydrograph is coarser than during the recession limb of the hydrograph. This is more marked for downstream moving storms.

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