Crustacean zooplankton assemblages in Algerian saline lakes: a comparison with their Chilean Altiplano counterparts

Crustacean communities in saline lakes are regulated mainly by salinity, and a significant inverse correlation can be found between salinity and species richness. The aim of the present study is to compare the carcinological diversity of two distinct arid regions of the world: Algerian saline lakes, locally called “chotts” and “sebkhas”, and their Chilean Altiplano counterparts, and to determine if there are similar regulator patterns that influence the composition of those communities. The main halophilic taxon common to both regions was the anostracan Artemia at high salinities. However, many other halotolerant crustaceans may occur in Algerian chotts and sebkhas, such as Phallocryptus spinosa, Branchinectella media, Moina salina, Cletocamptus retrogressus, Arctodiaptomus salinus and Heterocypris sp. In Chilean saline lakes the calanoid copepod Boeckella poopoensis was an important component of zooplankton at high salinities, while ostracods were totally absent. The results of correlation analysis revealed a significant inverse correlation between salinity and species number (Algeria, , , p-value = 0.0032; Chile, , ; p-value < 0.0165). The results of null model analysis describing species co-occurrence showed that the species communities are random for Algerian saline lakes due to the presence of many halotolerant species. For Chilean saline lakes, the species communities are structured.

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Abundance of Boeckella gracilis (Daday, 1902) (Copepoda, Calanoida) in seasonal coastal pools in the Araucania region (38°S, Chile)

Crustaceana ◽

10.1163/15685403-00003814 ◽

2018 ◽

Vol 91 (10) ◽

pp. 1211-1217

Author(s):

Patricio De los Ríos

Keyword(s):

Correlation Analysis ◽

Environmental Stress ◽

Relative Abundance ◽

Calanoid Copepod ◽

Inverse Correlation ◽

Inland Waters ◽

Absolute Abundance ◽

Significant Inverse Correlation

Abstract The presence of the calanoid copepod Boeckella gracilis (Daday, 1902) in Chilean seasonal pools has been only poorly studied as yet. The aim of the present study thus is to investigate the role of conductivity and temperature on the relative and absolute abundance of B. gracilis in seasonal coastal pools in the Araucania region (38°S, Chile). The results of correlation analysis revealed the presence of a significant inverse correlation between conductivity and relative abundance, whereas no significant correlations were found between conductivity and absolute abundance, between temperature and absolute abundance, and between temperature and relative abundance. These results agree partially with similar observations for mountain pools in the same region, but they would not agree with observations for calanoids of saline and subsaline inland waters in the northern and southern extremes of Chile. Considering this scenario, the species would show different populational responses to environmental stress in different situations, which phenomenon deserves to be studied more extensively and in more detail.

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Use of Null Models to Explain Crustacean Zooplankton Assemblages in Northern Patagonian Lakes (Chile) with and Without Mixotrophic Ciliates

Crustaceana ◽

10.1163/001121611x584343 ◽

2011 ◽

Vol 84 (9) ◽

pp. 1061-1068 ◽

Cited By ~ 2

Author(s):

Patricio De Los Ríos-Escalante ◽

Stefan Woelfl

Keyword(s):

Null Model ◽

Field Work ◽

Study Data ◽

Null Models ◽

Crustacean Zooplankton ◽

Species Number ◽

Calanoid Copepods ◽

Patagonian Lakes ◽

Study Sites ◽

Mixotrophic Ciliates

AbstractThe zooplankton assemblages in deep, mostly oligotrophic northern Patagonian lakes are characterized by a low species number and a marked dominance of calanoid copepods, as well as often by the presence of large mixotrophic ciliates (Stentor). In the present study, data collected in field work on four northern Patagonian lakes were analysed using co-occurrence of null models, with the aim to determine potential regulating factors for the observed crustacean and mixotrophic ciliate assemblages, using a presence-absence matrix. The null model uses species co-occurrence, and the basis of this model is that the species associations observed are random. The results revealed the absence of regulating factors and indicate that the sites are relatively homogeneous, with low species numbers, and similar plankton assemblages at all study sites. This finding coincides with similar descriptions for zooplankton assemblages in other Chilean Patagonian lakes.

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Crustacean zooplankton communities in Chiloé Island coastal lakes (42°S, Chile)

Crustaceana ◽

10.1163/15685403-00003766 ◽

2018 ◽

Vol 91 (2) ◽

pp. 213-223 ◽

Cited By ~ 1

Author(s):

Patricio R. De los Ríos Escalante ◽

Fatima Kies

Keyword(s):

Species Richness ◽

Null Model ◽

Crustacean Zooplankton ◽

Species Number ◽

Mineral Concentration ◽

Crustacean Species ◽

Organic Carbon Concentration ◽

Nitrogen Concentrations ◽

Potential Factors ◽

Zooplankton Communities

The lakes of Chiloé Island have a high dissolved organic carbon concentration (known as “humic”) and show a connection with brackish water. They also display a high species richness of crustacean zooplankton. The aim of the present study is to characterize the potential factors that explain crustacean species richness in Chiloé Island lakes. To that purpose parameters of the abiotic environment were determined. The results of PCA performed on those data revealed the existence of three lakes with high crustacean species richness that are relatively deep, show high nitrogen concentrations, and are located at relatively high altitude. In contrast, there are two lakes with low species richness, high mineral concentration, and situated at low altitude. One of these lowland lakes gives rise to a river effluent to the sea, and it is connected to the other lake; these observations agree with the results of a performed cluster analysis. Nevertheless, the co-occurrence null model analysis revealed the absence of regulator patterns in species associations, which could be explained to the fact that many of the species occur in most of the lakes. These results are markedly different in comparison to Patagonian lakes of Argentina and Chile that have a low crustacean species number.

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High Levels of Plasma Protein C in Nephrotic Syndrome

Thrombosis and Haemostasis ◽

10.1055/s-0038-1661225 ◽

1985 ◽

Vol 53 (01) ◽

pp. 005-007 ◽

Cited By ~ 16

Author(s):

I Pabinger-Fasching ◽

K Lechner ◽

H Niessner ◽

P Schmidt ◽

E Balzar ◽

...

Keyword(s):

Nephrotic Syndrome ◽

Plasma Protein ◽

Protein C ◽

Inverse Correlation ◽

Elevated Plasma ◽

Significant Inverse Correlation ◽

At Iii ◽

Thrombotic Tendency ◽

Protein C Activity

SummaryIn patients with severe nephrotic syndrome determinations of plasma protein C : Ag levels (8 patients: 5 adults, 3 children) and protein C activity (3 out of 8 patients) revealed significantly elevated plasma protein C concentrations. Furthermore we observed a significant inverse correlation of protein C : Ag to AT III : Ag levels. No protein C : Ag could be detected in the urine of two patients studied. We conclude from our data, that changes of plasma protein C do not contribute to the high thrombotic tendency in nephrotic syndrome.

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Study of Carbon Monoxide Intoxication in Fire Victimis

Revista de Chimie ◽

10.37358/rc.17.12.6010 ◽

2018 ◽

Vol 68 (12) ◽

pp. 2932-2935

Author(s):

Sofia David ◽

Anton Knieling ◽

Calin Scripcaru ◽

Madalina Diac ◽

Ion Sandu ◽

...

Keyword(s):

Carbon Monoxide ◽

Carbon Monoxide Poisoning ◽

Inverse Correlation ◽

Blood Samples ◽

Mortality And Morbidity ◽

Carbon Monoxide Intoxication ◽

Gas Poisoning ◽

The World ◽

Fire Victims ◽

In Fire

Carbon monoxide poisoning is the leading cause of mortality and morbidity of toxic origin in the world. Its insidious and polymorphic symptomatology makes it difficult to diagnose. It occurs accidentally, because of non-supervised domestic fires, or in fire victims. In fire victims, in particular, the differential diagnosis between carbon monoxide gas poisoning, inhalation of other toxic products of combustion like cyanide, oxygen deprivation, thermal burns and shock due to burns as a cause of death is not an easy task. The authors examined 107 fire victims that were autopsied at the Forensic Medicine from Iasi, Romania, in the last 10 years (2007-2016). Most cases were males (69.16%), young (0-9 years) or older than 60 with a burned surface of 91-100% in 68.22% of cases. Blood samples from the cadavers were collected in all cases in order to analyse carboxyhaemoglobin concentration and haemolysis. Toxicological analysis revealed a carboxyhaemoglobin level of maximum 95% but the majority of cases (70.72%) had a concentration inferior to 50%. An inverse correlation was identified between carboxyhaemoglobin concentration and haemolysis, an indicator of heat dissociation. Our study proves that many fire victims may die because of carbon monoxide intoxication prior to the extent of burns at a lethal potential.

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The Dependence of Renal 68Ga[Ga]-DOTATOC Uptake on Kidney Function and Its Relevance for Peptide Receptor Radionuclide Therapy with 177Lu[Lu]-DOTATOC

Diagnostics ◽

10.3390/diagnostics11071216 ◽

2021 ◽

Vol 11 (7) ◽

pp. 1216

Author(s):

Falk Gühne ◽

Alexander Heinzig ◽

Philipp Seifert ◽

Robert Drescher ◽

Martin Freesmeyer

Keyword(s):

Kidney Function ◽

Specific Binding ◽

Correlation Coefficients ◽

Inverse Correlation ◽

Peptide Receptor Radionuclide Therapy ◽

Tracer Uptake ◽

Significant Inverse Correlation ◽

Peptide Receptor ◽

Pet Ct ◽

Induced Changes

Background: In addition to its SSTR-specific binding in tumors and healthy tissues, DOTATOC analogues accumulate in kidney parenchyma. Renal tracer uptake might be a surrogate of kidney function or dysfunction. This study aimed to evaluate if kidney function can be estimated from 68Ga[Ga]-DOTATOC uptake in PET/CT and its impact on the nephrotoxicity of 177Lu[Lu]-DOTATOC PRRT. Methods: Two cohorts of patients (A: 128 diagnostic patients; B: 32 PRRT patients) were evaluated retrospectively. SUV values of the kidneys, physiologically SSTR-expressing organs and in background compartments were assessed. Kidney function was calculated as eGFR by CKD-EPI creatinine equation. Pearson’s correlation coefficients and treatment-induced changes of uptake and kidney function were assessed and compared. Results: Kidney function and renal DOTATOC uptake showed a significant inverse correlation (R2 = 0.037; p = 0.029). Evaluated models of PET/CT measurements were not able to predict kidney function sufficiently. The uptake of other organs did not depend on eGFR. While the renal uptake increased after PRRT (p < 0.001), the kidney function did not change significantly (p = 0.382). Neither low pre-therapeutic eGFR nor high pre-therapeutic kidney uptake were risk factors of PRRT-induced deterioration in kidney function. Conclusion: The relevance of kidney function for renal 68Ga[Ga]-DOTATOC uptake is limited. The nephrotoxicity of 177Lu[Lu]-DOTATOC PRRT might be low and cannot be reliably predicted by pre-therapeutic measurements.

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Construct Validity for Self-Acceptance and Fear of Negative Evaluation

Psychological Reports ◽

10.2466/pr0.2001.89.2.386 ◽

2001 ◽

Vol 89 (2) ◽

pp. 386-386 ◽

Cited By ~ 5

Author(s):

Mark W. Durm ◽

Patricia E. Glaze

Keyword(s):

Construct Validity ◽

Inverse Correlation ◽

The Self ◽

Negative Evaluation ◽

Fear Of Negative Evaluation ◽

Significant Inverse Correlation ◽

Acceptance Scale ◽

Self Acceptance

For 55 students (13 men, 42 women) there was a significant inverse correlation for scores on the Self-acceptance Scale and scores on the Fear of Negative Evaluation Scale, thereby giving credence to the construct validity of both scales, that is, the more one accepts oneself, the less negative evaluation there is of oneself.

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Changes in Dickkopf-1 (DKK1) and Sclerostin following a Loading Dose of Vitamin D2(300,000 IU)

Journal of Osteoporosis ◽

10.1155/2014/682763 ◽

2014 ◽

Vol 2014 ◽

pp. 1-7 ◽

Cited By ~ 11

Author(s):

A. Sankaralingam ◽

R. Roplekar ◽

C. Turner ◽

R. N. Dalton ◽

G. Hampson

Keyword(s):

Vitamin D ◽

Bone Health ◽

Inverse Correlation ◽

Loading Dose ◽

Multilinear Regression ◽

Significant Inverse Correlation ◽

Blood Samples ◽

Multilinear Regression Analysis ◽

Wnt Inhibitors ◽

Dickkopf 1

Background. Vitamin D is important for bone health, although high loading doses have been associated with an increase in fracture risk. The mechanisms remain uncertain.Aim. We hypothesize that supraphysiological concentrations of 1,25 (OH)2vitamin D may inhibit formation by increasing the production of Wnt inhibitors: sclerostin andDKK1.Subjects and Methods. We measured serum sclerostin andDKK1in 34 patients (21 F, 13 M) aged mean (SD) 61.3 (15.6) years with vitamin D deficiency/insufficiency treated with a loading dose of vitamin D2(300,000 IU) intramuscularly. Blood samples were taken at baseline and serially up to 3 months.Results. Serum 1,25 (OH)2vitamin D increased markedly at 3 months (mean (SD) baseline 116 (63), 3 months : 229 (142) pmol/L,P<0.001). There was a significant correlation between sclerostin andDKK1at baseline (r=0.504, P=0.002) and at 3 months (r=0.42, P=0.013). A significant inverse correlation was observed between sclerostin and eGFR at 3 months (r=-0.494, P=0.007). Sclerostin increased significantly at 3 months (P=0.033). In a multilinear regression analysis with % change in sclerostin andDKK1as dependent variable, a positive significant association was observed with % change in 1,25 (OH)2vitamin D (P=0.038), independent of changes in PTH and following correction for confounders such as age, gender, BMI, BMD and eGFR.Conclusions. Supraphysiological concentration in 1,25 (OH)2vitamin D achieved following a loading dose of vitamin D increases sclerostin and may inhibit Wnt signalling. This may have detrimental effects on bone.

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Radiographic changes in TMJ in relation to serology and disease activity in RA patients

Dentomaxillofacial Radiology ◽

10.1259/dmfr.20190186 ◽

2020 ◽

Vol 49 (1) ◽

pp. 20190186

Author(s):

Mostafa Mahmoud Youssef Mohamed ◽

Mushira M. Dahaba ◽

Mary Medhat Farid ◽

Adel Mahmoud Ali Elsayed

Keyword(s):

Rheumatoid Arthritis ◽

Disease Activity ◽

Joint Damage ◽

Inverse Correlation ◽

Rheumatoid Arthritis Group ◽

Control Group ◽

Significant Inverse Correlation ◽

Moderate Disease ◽

Condylar Head ◽

Radiographic Changes

Objectives: This study was undertaken as an attempt to assess radiographic temporomandibular joint (TMJ) changes in relation to rheumatoid factor (RF), anticitrullinated protein (ACCP) antibodies and disease activity score 28 (DAS28) in rheumatoid arthritis (RA) patients to find the best predictor of rheumatoid affection of the TMJ with the ultimate goal of maintaining TMJ function and preventing joint damage. Methods: 20 Rheumatoid Arthritis patients as well as 20 volunteers were included in this study. RA group were assessed for RF, ACCP, DAS28. Both groups were assessed by CBCT for TMJ dimensions and radiographic osteoarthritic changes. All data were statistically analyzed. Results: Rheumatoid Arthritis group showed significantly less condylar height and more radiographic osteoarthritic changes than the control group. RF showed no significant correlation with either TMJ measurements or TMJ radiographic osteoarthritic changes. ACCP showed significant inverse correlation with condylar height and anteroposterior (AP) dimensions, but non-significant relation with mediolateral dimension and radiographic osteoarthritic changes. DAS28 showed significant inverse correlation with condylar AP and mediolateral dimensions. It also showed significant correlation with flattening of the TMJ condylar head and flattening of the articular fossa. Patients with high and moderate disease activity showed significantly smaller AP TMJ dimension than patients with low disease activity. Disease activity showed statistically significant direct correlation with all osteoarthritic changes except for erosions of the glenoid fossa and condyle. Conclusion: Disease Activity Score28 score and disease activity are strong indicators of TMJ affection in RA patients when compared to RF and ACCP. ACCP is a better indicator of changes in condylar measurements than TMJ osteoarthritic changes. While RF is the least efficient indicator of TMJ involvement in RA patients.

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Inland water microcrustacean assemblages in an altitudinal gradient in Aysen region (46° S, Patagonia Chile)

Brazilian Journal of Biology ◽

10.1590/1519-6984.08212 ◽

2014 ◽

Vol 74 (1) ◽

pp. 8-15 ◽

Cited By ~ 3

Author(s):

Patricio De los Ríos-Escalante ◽

Esteban Quinán ◽

Patricio Acevedo

Keyword(s):

National Park ◽

Altitudinal Gradient ◽

Null Model ◽

Tierra Del Fuego ◽

Species Number ◽

Regional Studies ◽

Inland Water ◽

Chilean Patagonia ◽

Water Ecosystems ◽

Torres Del Paine

The Chilean Patagonia has numerous kinds of inland water ecosystems such as lakes, ponds, wetlands and rivers that have been poorly studied due to access difficulties. This study was carried out in Aysen region, in southern Chile, and it included different kinds of water bodies such as rivers, streams, ponds, lagoons and lakes distributed along an altitudinal gradient at 46° S. It was found a low species number, essentially cladocerans, copepods and amphipods. A null model was applied in order to determine the existence of regulator factors of species associations, and the results revealed that they are not random. The patterns would be influenced by geographical and limnological characteristics of the studied sites. Our results would agree with regional studies on habitat heterogeneity such as in Torres del Paine National Park and other zones in Tierra del Fuego island.

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