scholarly journals The Occurrence of Intersex in Different Populations of the Marine Amphipod Echinogammarus marinus in North-West Brittany – A Longterm-Study

2021 ◽  
Vol 12 ◽  
Author(s):  
Matthias Oetken ◽  
Marissa Adler ◽  
Katharina Alt ◽  
Jean Bachmann ◽  
Andrea Dombrowski ◽  
...  
Keyword(s):  
Genetic Factors ◽  
Endocrine Disrupting Chemicals ◽  
Freshwater Ecosystems ◽  
North West ◽  
The Past ◽  
Endocrine Disrupting ◽  
Marine Amphipod ◽  
Different Populations ◽  
Term Monitoring

In the past two decades, an increasing body of studies has been published on the intersex phenomenon in separate-sexed crustaceans from marine and freshwater ecosystems. Various causes are being considered that could have an influence on the occurrence of intersex. Besides genetic factors, environmental conditions such as photoperiodicity, temperature, salinity and parasitism, but also environmental pollution with endocrine disrupting chemicals (EDCs) are discussed. As part of a long-term monitoring (2012 – 2020) in north-west Brittany, we recorded the occurrence of intersex in the marine amphipod Echinogammarus marinus. We quantified the intersex incidence at marine and estuarine sites and analyzed the incidence in relation to the endocrine potential of the sediments. Intersex occurred with mean frequencies between 0.87% and 12%. It was striking that the incidence of intersex increased with increasing distance from the sea. Since the highest incidence was observed at the range boundary of this stenohaline species, we assume that intersex is triggered by endocrine potential and increasing stress due to increasing freshwater content − and thus an interplay of different environmental factors.

Enabling Community Well-being Self-Monitoring in the Context of Mining: The Naskapi Nation of Kawawachikamach

2016 ◽  
Vol 1 (2) ◽  
Author(s):  
Robert Klinck ◽  
Ben Bradshaw ◽  
Ruby Sandy ◽  
Silas Nabinacaboo ◽  
Mannie Mameanskum ◽  
...  
Keyword(s):  
Indigenous Peoples ◽  
Well Being ◽  
Aboriginal Community ◽  
Self Monitoring ◽  
Community Engaged Research ◽  
The Past ◽  
Mineral Development ◽  
Iron Deposits ◽  
Term Monitoring

The Naskapi Nation of Kawawachikamach is an Aboriginal community located in northern Quebec near the Labrador Border. Given the region’s rich iron deposits, the Naskapi Nation has considerable experience with major mineral development, first in the 1950s to the 1980s, and again in the past decade as companies implement plans for further extraction. This has raised concerns regarding a range of environmental and socio-economic impacts that may be caused by renewed development. These concerns have led to an interest among the Naskapi to develop a means to track community well-being over time using indicators of their own design. Exemplifying community-engaged research, this paper describes the beginning development of such a tool in fall 2012—the creation of a baseline of community well-being against which mining-induced change can be identified. Its development owes much to the remarkable and sustained contribution of many key members of the Naskapi Nation. If on-going surveying is completed based on the chosen indicators, the Nation will be better positioned to recognize shifts in its well-being and to communicate these shifts to its partners. In addition, long-term monitoring will allow the Naskapi Nation to contribute to more universal understanding of the impacts of mining for Indigenous peoples.

scholarly journals FORECAST OF THE REFORMATION OF THE KRASNOYARSK RESERVOIR COASTAL ZONE IN THE KURTAK VILLAGE

2019 ◽  
Vol 29 (2) ◽  
pp. 267-278
Author(s):  
G.Yu. Yamskikh ◽  
A.V. Kozhukhovsky ◽  
K.V. Marusin ◽  
E.A. Fedorova
Keyword(s):  
Economic Activity ◽  
Similar Type ◽  
Coastal Processes ◽  
The Past ◽  
The Reformation ◽  
Long Term Monitoring ◽  
Verification Of Models ◽  
The Village ◽  
Term Monitoring

The article presents the analysis and prediction of coastal processes at the site of the Krasnoyarsk reservoir in the village of Kurtak where there are the most intensive processes of coastal reshaping. Over the past 50 years, the coast has receded here by an average of 350 m and continues to actively collapse at a speed of 3-5 m per year. Despite the fact that the intensity of coastal processes in this area has significantly decreased (mainly due to the general decrease in the level of the Krasnoyarsk reservoir), the rate of retreat of the shore is still high. However, it can be concluded that for the researched area the coastal reshaping does not pose a real threat to economic activity in the next 30 years. The article tested various methods of forecasting coastal processes, selected the most appropriate for the shores of a similar type. Verification of models was carried out on the basis of data of long-term monitoring of the site under consideration, which gave the chance to compare results of forecasts on different techniques to real retreat of the coast on this site.

scholarly journals Stem Cells as Hormone Targets That Lead to Increased Cancer Susceptibility

Endocrinology ◽  
2015 ◽  
Vol 156 (10) ◽  
pp. 3451-3457 ◽  
Author(s):  
Gail S. Prins ◽  
Esther L. Calderon-Gierszal ◽  
Wen-Yang Hu
Keyword(s):  
Stem Cell ◽  
Cancer Risk ◽  
Progenitor Cell ◽  
Cancer Susceptibility ◽  
Prostate Gland ◽  
Endocrine Disrupting Chemicals ◽  
Cell Populations ◽  
Cancer Etiology ◽  
The Past ◽  
Endocrine Disrupting

Major advances during the past decade have permitted a clearer understanding of processes that regulate stem cell self-renewal and lineage commitment toward differentiated progeny that populate all tissues. Considerable evidence has also accumulated to indicate that aberrations in the stem and progenitor cell populations can lead to increased cancer risk in specific organs systems. It is long recognized that environmental factors play a major role in cancer etiology, and emerging data suggest that endocrine-disrupting chemicals (EDCs) may contribute to an increased cancer risk. Using the prostate gland as a model system, the present review highlights recent data that find that estrogens and EDCs can reprogram prostate stem and progenitor cell populations, leading to increased cancer susceptibility. We propose that stem cell programming during early development in hormone-regulated tissues may lead to heightened sensitivity to early-life EDC exposures and that aberrant stem cell reprogramming by EDCs may contribute to the developmental basis of adult cancer risk.

scholarly journals The diverse pulsational behaviour of β Cep stars: results from long-term monitoring

2013 ◽  
Vol 9 (S301) ◽  
pp. 417-418 ◽  
Author(s):  
G. Handler
Keyword(s):  
The Past ◽  
Consistent Picture ◽  
Long Term Monitoring ◽  
Frequency Changes ◽  
Term Monitoring

AbstractWe studied seven β Cep stars photometrically over the past ten years. Some showed amplitude variations, some frequency changes, and others exhibited stable pulsations, with no consistent picture yet emerging. Additionally, 12 Lac appears to have a 6.7-yr binary companion.

scholarly journals Human Health Consequences of Endocrine-Disrupting Chemicals

2020 ◽  
Author(s):  
Hassan M. Heshmati
Keyword(s):  
Human Health ◽  
Endocrine Disrupting Chemicals ◽  
Economic Consequences ◽  
Future Generations ◽  
Long Term Effects ◽  
Adult Disease ◽  
Endocrine Disrupting ◽  
Global Threat ◽  
Fetus And Neonate

Daily use of chemicals is an essential part of modern life. Endocrine-disrupting chemicals (EDCs) are a heterogeneous group of exogenous chemicals or chemical mixtures that interfere with the action of hormones and consequently cause adverse effects to humans and wildlife. The number of EDCs has markedly increased over the past 60 years. Humans are constantly exposed to hundreds of EDCs mainly through air, water, and food. Exposure to EDCs (in utero or lifetime) may be a significant component of the environmental origin of several medical conditions. The developing fetus and neonate are more sensitive than adults to perturbation by EDCs. The prenatal damage can cause adverse consequences later in life (developmental origins of adult disease). In many cases, the damage is irreversible. There is also a possibility of transgenerational effects. By interfering with hormonal functions, EDCs can contribute to a variety of dysfunctions and diseases including obesity, diabetes, reproductive disorders, and cancers. Information on long-term effects of chronic, low-dose exposure to EDCs is relatively limited. EDCs represent a global threat for human health and cause a high cost for the society. Promoting public knowledge and initiating preventive measures will help minimizing the health and economic consequences of EDCs for future generations.

scholarly journals LONG-TERM MONITORING OF THE EUROPEAN ROLLER (CORACIAS GARRULUS) IN UKRAINE: IS CLIMATE BEHIND THE CHANGES?

2021 ◽  
Author(s):  
Tatiana Shupova ◽  
Volodymyr Tytar
Keyword(s):  
Spatially Explicit ◽  
Climate Data ◽  
Time Intervals ◽  
Coracias Garrulus ◽  
The Past ◽  
Historical Times ◽  
Long Term Monitoring ◽  
European Roller ◽  
Term Monitoring

Since the 1980s there has been a long-term decline in numbers and contraction of range in Europe, including Ukraine. Our specific goals were to reconstruct the climatically suitable range of the species in Ukraine before the 1980s, gain better knowledge on its requirements, compare the past and current suitable areas, infer the regional and environmental variables that best explain its occurrence, and quantify the overall range change in the country. For these purposes we created a database consisting of 347 records of the roller made ever in Ukraine. We employed a species distribution modeling (SDM) approach to hindcast changes in the suitable range of the roller during historical times across Ukraine and to derive spatially explicit predictions of climatic suitability for the species under current climate. SDMs were created for three time intervals (before 1980, 1985-2009, 2010-2021) using corresponding climate data extracted from the TerraClim database. SDMs show a decline of suitable for rollers areas in the country from 85 to 46%. Several factors, including land cover and use, human population density and climate, that could have contributed to the decline of the species in Ukraine were considered. We suggest climate change and its speed (velocity) have been responsible for shaping the contemporary home range of the European roller.

scholarly journals Masers in evolved star winds

2012 ◽  
Vol 8 (S287) ◽  
pp. 199-208
Author(s):  
Anita M. S. Richards
Keyword(s):  
Evolutionary Stage ◽  
Interferometric Imaging ◽  
Physical Conditions ◽  
The Past ◽  
Evolved Stars ◽  
Multiple Observations ◽  
Wide Range ◽  
The Many ◽  
Term Monitoring

AbstractThis review summarises current observations of masers around evolved stars and models for their location and behaviour, followed by some of the many highlights from the past 5 years. Some of these have been the fruition of long-term monitoring, a vital aspect of study of stars which are both periodically variable and prone to rapid outbursts or transition to a new evolutionary stage. Interferometric imaging of masers provide the highest-resolution probes of the stellar wind, but their exponential amplification and variability means that multiple observations are needed to investigate questions such as what drives the wind from the stellar surface; why does it accelerate slowly over many tens of stellar radii; what causes maser variability. VLBI parallaxes have improved our understanding of individual objects and of Galactic populations. Masers from wide range of binary and post-AGB objects are accessible to sensitive modern instruments, including energetic symbiotic systems. Masers have been detected up to THz frequencies withHerscheland ALMA's ability to resolve a wide range of maser and thermal lines will provide accurate constraints on physical conditions including during dust formation.

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