scholarly journals Long-term monitoring of the dredged material deposit sites in the Eastern Gulf of Finland

2020 ◽  
Vol 164 ◽  
pp. 01010
Author(s):  
Alexander Chusov ◽  
Mikhail Shilin ◽  
George Gogoberidze ◽  
Nikolai Bobylev ◽  
Alexandra Ershova ◽  
...  
Keyword(s):  
Zero Point ◽  
Condition Index ◽  
Gulf Of Finland ◽  
Dredged Material ◽  
Monitoring Methods ◽  
Biological Communities ◽  
Environmental Status ◽  
Term Monitoring ◽  
Neva Bay

The goal of the paper is summarizing the results of the 20-years monitoring of the deposit sites of the dredged material in the Eastern Gulf of Finland (EGoF) and in the Neva Bay. The biotic and abiotic components of deposit sites ecosystems were observed there in 1999-2019, with using standard monitoring methods, in order to reveal effects of dumping on hydrobiologic communities and to determine their environmental status. The Biota Condition Index for 6 deposit sites was calculated and compared to areas which are not stressed by dumping. It is shown that the biological communities (especially – benthic) in the deposit sites areas are enormous not-sustainable and start their succession from the zero point every time after repeating stressing effect of dumping.

scholarly journals Experimental studies of benthos resistance to mechanical burying under the dredging material

2020 ◽  
Vol 164 ◽  
pp. 01001
Author(s):  
Alexander Chusov ◽  
Mikhail Shilin ◽  
George Gogoberidze ◽  
Julia Lednova ◽  
Nikolai Bobylev
Keyword(s):  
Experimental Studies ◽  
Gulf Of Finland ◽  
Tubifex Tubifex ◽  
Dredged Material ◽  
Stress Effect ◽  
Benthic Organisms ◽  
Melanoides Tuberculata ◽  
Marine Sand ◽  
Series Of Experiments ◽  
Neva Bay

The goal of the fulfilled research is the study of the influence of the sedimentary suspension from the dredging material on the benthic hydrobionts. In laboratory aquariums six series of experiments were carried out with triple replication on the ability of different benthic organisms to dig out the soil strata due to their periodic burying by marine sand. These experiments were oriented on biota of Eastern Gulf of Finland and the Neva Bay, where a number of deposit sites for dredging material are located presently. Representatives of three main groups of hydrobionts of these areas were selected for experiments – Chironomidae, Gastropoda and Oligochaeta. The ability of different hydrobiont species to overcome the stress effect of the burying under the dredged material was estimated quantitatively. The results show, that the resistance of the studied species to mechanical burying is decreasing in accordance to the scheme: Chironomus plumosus > Melanoides tuberculata > Tubifex tubifex, and depends from the thickness of the layer of dredged material.

USING OF MULTI-YEAR REMOTE SENSING DATA FOR THE NEVA BAY AND THE EASTERN GULF OF FINLAND FOR REVEALING PECULIARITIES OF ANTHROPOGENIC IMPACTS OF HYDRO-TECHNICAL FACILITIES BUILDING AND DREDGINGS ON THE COASTAL AND WATER ENVIRONMENT

2017 ◽  
Author(s):  
Leontina Sukhacheva ◽  
Leontina Sukhacheva
Keyword(s):  
Remote Sensing ◽  
Coastal Water ◽  
Anthropogenic Impacts ◽  
Water Environment ◽  
Water Dynamics ◽  
Spatiotemporal Variability ◽  
Gulf Of Finland ◽  
Anthropogenic Factors ◽  
Neva Bay

This paper is devoted to the use of long-term remote sensing (RS) data for assessment of anthropogenic impacts on the coastal water environment of the Neva Bay (NB) and the eastern part of the Gulf of Finland (EGOF), caused by construction of hydro-ingineering facilities, operations for land reclamation, dredging and underwater dumping. The study period includes past four decades for which airborne and satellite data are available. Results of using long-term RS data sets for monitoring and studying coastal water environment, for estimation of levels of water contamination by suspended matter (SM), for revealing spatiotemporal variability of SM distribution under the influence of natural and anthropogenic factors, for studying features of surface water dynamics and of phytoplankton development, are discussed.

Abstract 15976: Results of the Full Cox-Maze Procedure: EKG vs 24-Hour Holter vs One-Week Long-Term Holter Monitoring

Circulation ◽  
2014 ◽  
Vol 130 (suppl_2) ◽  
Author(s):  
Niv Ad ◽  
Lori E Stone ◽  
Sari D Holmes
Keyword(s):  
Holter Monitoring ◽  
Maze Procedure ◽  
Monitoring Methods ◽  
Monitoring Techniques ◽  
Monitoring Technique ◽  
High Return ◽  
Long Term Monitoring ◽  
Term Monitoring ◽  
Time Point

Introduction: Much of work published on Cox-Maze procedure results has utilized EKGs or 24-hour Holter without information on anti-arrhythmic drugs (AAD). The purpose of this study was to explore results at 6 and 24 months following the Cox-Maze procedure using various rhythm monitoring techniques. Hypothesis: It was hypothesized that long-term monitoring (LTM) would identify more patients who experienced atrial arrhythmia (AA) at each time point than other monitoring techniques. Methods: Cox-Maze III/IV patients off AAD were offered 1-week LTM with n=220 at 6 and n=94 at 24 months. EKG, 24-hour Holter, and LTM were ascertained at the same time. The HRS definition (AA >30 seconds) was used for ablation failure. Results: At 6 months EKG found n=216 returned to sinus rhythm (SR), 24-hr Holter found n=211 returned to SR, while n=203 were in SR by LTM (FIGURE). Of patients experiencing AA at 6 months, duration <1 hour was documented in 56% by 24-hr Holter and 59% by LTM (FIGURE). At 24 months, EKG found n=89 returned to SR, 24-hr Holter found n=88 returned to SR, while n=85 were in SR by LTM. Of patients experiencing AA at 24 months, duration <1 hour was documented in 50% by 24-hr Holter and 67% by LTM. At 6 months, percent in SR differed for EKG vs LTM (p<0.001) and 24-hr Holter vs LTM (p=0.02). At 24 months, monitoring methods did not differ. Conclusions: The Cox-Maze procedure demonstrated high return to SR off AAD, regardless of monitoring technique. However, LTM provides more accuracy earlier in postoperative period and should be used when discussing discontinuation of anticoagulation. Due to clinical and financial challenges in applying LTM, patients in which LTM has most value should be identified.

scholarly journals Diversity of Biological Communities Along the Major Rivers of Sundarbans in Bangladesh

2021 ◽  
Vol 34 (2) ◽  
Author(s):  
MD. NAGIM UDDIN ◽  
ISRAT JAHAN TUMPA ◽  
ZAKIR HOSSAIN ◽  
Keyword(s):  
Global Climate ◽  
Monsoon Season ◽  
Diversity Indices ◽  
Biological Communities ◽  
Fisheries Resources ◽  
Post Monsoon Season ◽  
Long Term Monitoring ◽  
Zooplankton Communities ◽  
Term Monitoring

Despite recent unexpected and irreversible changes in the environment brought on by global climate change, the largest mangrove forest of Sundarbans is still considered a biodiversity hotspot in Bangladesh. This study aimed to assess the abundance, diversity indices and richness of plankton and fisheries resources of the four major rivers (Pasur, Sela, Sibsa, and Kapotakkho) in Sundarbans. During the study period (July 2017 to November 2018), the range of pH, temperature, salinity and dissolved oxygen values were from 7.1 to 8.7, 25 °C to 32.8 °C, 1.5 ‰ to 23 ‰ and 4.3 mg.L-1 to 7.7 mg.L-1 , respectively. Phytoplankton and zooplankton communities were represented by 29 and 18 species, respectively. The number of plankton per litre was highest in the Pasur River during both pre-monsoon and post-monsoon season. A total of 186 species of fish and crustaceans were recorded in the rivers of Sundarbans. The plankton, fish and crustacean diversity indices were as follows: Shannon-Wiener diversity (1.22 ± 0.27 to 3.48 ± 0.22), Margalef’s richness (1.29 ± 0.33 to 4.56 ± 0.45) and Pielou’s evenness (0.94 ± 0.04 to 1.02 ± 0.04). The results of the present study underscore new insight on riverine biological communities of the Sundarbans and emphasise the need for long-term monitoring in this ecologically fragile ecosystem.

USING OF MULTI-YEAR REMOTE SENSING DATA FOR THE NEVA BAY AND THE EASTERN GULF OF FINLAND FOR REVEALING PECULIARITIES OF ANTHROPOGENIC IMPACTS OF HYDRO-TECHNICAL FACILITIES BUILDING AND DREDGINGS ON THE COASTAL AND WATER ENVIRONMENT

2017 ◽  
Author(s):  
Leontina Sukhacheva ◽  
Leontina Sukhacheva
Keyword(s):  
Remote Sensing ◽  
Coastal Water ◽  
Anthropogenic Impacts ◽  
Water Environment ◽  
Water Dynamics ◽  
Spatiotemporal Variability ◽  
Gulf Of Finland ◽  
Anthropogenic Factors ◽  
Neva Bay

This paper is devoted to the use of long-term remote sensing (RS) data for assessment of anthropogenic impacts on the coastal water environment of the Neva Bay (NB) and the eastern part of the Gulf of Finland (EGOF), caused by construction of hydro-ingineering facilities, operations for land reclamation, dredging and underwater dumping. The study period includes past four decades for which airborne and satellite data are available. Results of using long-term RS data sets for monitoring and studying coastal water environment, for estimation of levels of water contamination by suspended matter (SM), for revealing spatiotemporal variability of SM distribution under the influence of natural and anthropogenic factors, for studying features of surface water dynamics and of phytoplankton development, are discussed.

Long-term monitoring data reveal pH dynamics, trends and variability in the western Gulf of Finland

2011 ◽  
Vol 40 (3) ◽  
Author(s):  
Andreas Brutemark ◽  
Jonna Engström-Öst ◽  
Anu Vehmaa
Keyword(s):  
Baltic Sea ◽  
Monitoring Data ◽  
Gulf Of Finland ◽  
Seasonal Effect ◽  
Winter Period ◽  
Water Ph ◽  
Long Term Monitoring ◽  
Term Monitoring ◽  
The Gulf Of Finland

AbstractMonitoring data on water pH are presented for the period between 1972 and 2009 from the sampling stations Längden and Storgadden, at the entrance to the Gulf of Finland, Baltic Sea. The overall pH in the area ranged from 9.2 to 7.4, on average 8.1, and showed a significant decreasing trend during the winter period corresponding to a median annual decrease of 0.006. The data corroborate previous findings about a seasonal effect, where pH is higher during summer than winter.

Comparison of Long-Term Monitoring Methods for Bipolar Affective Disorder

2002 ◽  
Vol 45 (1) ◽  
pp. 27-32 ◽  
Author(s):  
M. Hörn ◽  
L. Schärer ◽  
S. Walser ◽  
D. Scherer-Klabunde ◽  
C. Biedermann ◽  
...  
Keyword(s):  
Affective Disorder ◽  
Bipolar Affective Disorder ◽  
Monitoring Methods ◽  
Long Term Monitoring ◽  
Term Monitoring

Experience with an intracranial pressure transducer readjustable in vivo

1974 ◽  
Vol 40 (2) ◽  
pp. 272-276 ◽  
Author(s):  
Wolfgang Gobiet ◽  
Wolfgang Joachim Bock ◽  
Jürgen Liesegang ◽  
Wilhelm Grote
Keyword(s):  
Intracranial Pressure ◽  
Pressure Transducer ◽  
Fluid Pressure ◽  
Zero Point ◽  
Epidural Pressure ◽  
Content Type ◽  
Ventricular Fluid Pressure ◽  
Term Monitoring

✓ A new implantable miniature intracranial pressure transducer is described whose main advantage is the possibility of zero point calibration in vivo. Comparative studies verify that epidural pressure corresponds well with ventricular fluid pressure. During long-term monitoring of 30 patients the transducer proved both safe and reliable.

scholarly journals Seychelles warblers with silver spoons: juvenile condition is a lifelong predictor of annual survival, but not annual reproduction or senescence

2021 ◽  
Author(s):  
Thomas Brown ◽  
Hannah Dugdale ◽  
Martijn Hammers ◽  
Jan Komdeur ◽  
David Richardson
Keyword(s):  
Condition Index ◽  
Wild Populations ◽  
Environmental Complexity ◽  
Annual Survival ◽  
The Individual ◽  
Developmental Conditions ◽  
Somatic Stress ◽  
Term Monitoring ◽  
Intrinsic Condition

1) The environment experienced during development, and its impact on intrinsic condition, can have lasting outcomes for adult phenotypes and could contribute to the individual variation in senescence trajectories. 2) However, the nature of this relationship in wild populations remains uncertain, owing to the difficulties in summarizing environmental complexity and long-term monitoring of individuals from free-roaming long-lived species. 3) In this study, we determine whether juvenile condition (derived from measures of body mass and size) is associated with senescence-related traits of a closely monitored population of Seychelles warblers (Acrocephalus sechellensis). 4) Juveniles with a higher condition index were more likely to survive to adulthood – suggesting these juveniles experienced better developmental conditions. Furthermore, these juveniles as adults were in better condition and had higher rates of annual survival, independently of age. In contrast, there was no association between juvenile condition and declines in adult telomere length (a measure of somatic stress) nor annual reproduction. 5) These results indicate that juvenile condition, while not associated with senescence trajectories, can influence the likelihood of surviving to old age due to silver-spoon effects. This study shows that measures of intrinsic condition in juveniles can provide important insights into long-term fitness of individuals in wild populations.

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