Stable isotope and band-encounter analyses delineate migratory patterns and catchment areas of white-throated sparrows at a migration monitoring station

Oecologia ◽  
2005 ◽  
Vol 144 (4) ◽  
pp. 541-549 ◽  
Author(s):  
D. F. Mazerolle ◽  
K. A. Hobson ◽  
L. I. Wassenaar
Keyword(s):  
Stable Isotope ◽  
Monitoring Station ◽  
Catchment Areas ◽  
Migratory Patterns

Coastal groundwater stable isotope composition as predictor and measure of marine pollution

2020 ◽  
Author(s):  
Diana Mance ◽  
Davor Mance ◽  
Darija Vukić Lušić
Keyword(s):  
Stable Isotope ◽  
Environmental Economics ◽  
Marine Pollution ◽  
Isotope Composition ◽  
Anthropogenic Pressure ◽  
Karst Hydrology ◽  
Stable Isotope Composition ◽  
Causality Test ◽  
Fecal Indicator ◽  
Catchment Areas

<p>There are numerous health hazards arising from recreational exposures to microbiologically polluted marine environments. Microbial contaminants from catchment areas of coastal and submarine springs (due to leakages of private septic tanks and/or faults in sewage systems) could be a cause of microbial marine quality worsening after heavy rainfalls. Before testing this hypothesis groundwater dynamics should be known. Stable isotopes of water have been proven to be a very useful tool in karst hydrology and we used them as a mediator variable in predicting marine coastal water microbial contamination. <br>We refer to the problem of the pollution from the position of environmental economics and economic institutional mechanism design, where such ecological problems are described as either stock or flow problems. Stock pollution is strongly dependent on the concentration potentials of the pollutant in the medium. Flow pollution depends on the speed of emission of the pollutant in the medium, as well as on the rate of its depletion by natural causes. On the example of fecal indicator bacteria Escherichia coli and enterococci propagating through karstic underground and finally ending in seawater we show how stable isotope composition of coastal springs’ water can be used to differentiate marine pollution into stock or flow. <br>We tested the approach on two close coastal locations located at the Kvarner Bay (the Northern part of the Croatian part of the Adriatic Sea). Locations differ in terms of the open and closed sea as well as anthropogenic pressure. Groundwater and marine samples were collected during two consecutive bathing seasons (mid-May – mid-September). The Panel Data Pairwise Granger Causality test was used to test for statistical associations. Static Estimated General Least Squares (EGLS) and dynamic Generalised Method of Moments (GMM) statistical methods were used to distinguish between stock and flow pollution. </p><p>This work was partially supported by the University of Rijeka as part of the research projects uniri-pr-prirod-19-24 and uniri-biomed-18-292.</p>

Individual migratory patterns of two threatened seabirds revealed using stable isotope and geolocation analyses

2012 ◽  
Vol 19 (3) ◽  
pp. 317-329 ◽  
Author(s):  
Teresa Militão ◽  
Karen Bourgeois ◽  
Jose L. Roscales ◽  
Jacob González-Solís
Keyword(s):  
Stable Isotope ◽  
Migratory Patterns ◽  
Threatened Seabirds

scholarly journals A pilot study of eDNA metabarcoding to estimate plant biodiversity by an alpine glacier core (Adamello glacier, North Italy)

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Claudio Varotto ◽  
Massimo Pindo ◽  
Elena Bertoni ◽  
Christian Casarotto ◽  
Federica Camin ◽  
...  
Keyword(s):  
Stable Isotope ◽  
Isotope Ratio ◽  
High Throughput Sequencing ◽  
Biodiversity Loss ◽  
Stable Isotope Ratio ◽  
Plant Biodiversity ◽  
Alpine Glacier ◽  
Climate Change Effects ◽  
Novel Approach ◽  
Catchment Areas

AbstractCurrent biodiversity loss is a major concern and thus biodiversity assessment of modern ecosystems is compelling and needs to be contextualized on a longer timescale. High Throughput Sequencing (HTS) is progressively becoming a major source of data on biodiversity time series. In this multi proxy study, we tested, for the first time, the potential of HTS to estimate plant biodiversity archived in the surface layers of a temperate alpine glacier, amplifying the trnL barcode for vascular plants from eDNA of firn samples. A 573 cm long core was drilled by the Adamello glacier and cut into sections; produced samples were analyzed for physical properties, stable isotope ratio, and plant biodiversity by eDNA metabarcoding and conventional light microscopy analysis. Results highlighted the presence of pollen and plant remains within the distinct layers of snow, firn and ice. While stable isotope ratio showed a scarcely informative pattern, DNA metabarcoding described distinct plant species composition among the different samples, with a broad taxonomic representation of the biodiversity of the catchment area and a high-ranking resolution. New knowledge on climate and plant biodiversity changes of large catchment areas can be obtained by this novel approach, relevant for future estimates of climate change effects.

Variation in catchment areas of Indiana bat (Myotis sodalis) hibernacula inferred from stable hydrogen (δ2H) isotope analysis

2012 ◽  
Vol 90 (10) ◽  
pp. 1243-1250 ◽  
Author(s):  
E.R. Britzke ◽  
S.C. Loeb ◽  
C.S. Romanek ◽  
K.A. Hobson ◽  
M.J. Vonhof
Keyword(s):  
Isotope Analysis ◽  
Species Conservation ◽  
Myotis Sodalis ◽  
Indiana Bat ◽  
The North ◽  
Hair Samples ◽  
Catchment Areas ◽  
Summer Range ◽  
Migratory Patterns ◽  
Hydrogen Isotope Ratio

Understanding seasonal movements of bats is important for effective conservation efforts. Although female Indiana bats ( Myotis sodalis Miller and Allen, 1928) have been documented to migrate >500 km, knowledge of their migratory patterns is still extremely limited. We used the relationship between latitude and stable hydrogen isotope ratio in bat hair (δ2Hhair) to estimate the north–south extent of the summer range (catchment area) of bats hibernating in 14 Indiana bat hibernacula in eight states throughout its range. Range of δ2Hhair values varied substantially among hibernacula, suggesting large differences among sites in the north–south distance travelled by bats between summer and winter habitats. In particular, hibernacula in the southern portion of the range had greater catchment areas than those in the central and northern portions of the range. Variability in movement distances among sites was not associated with the number of hair samples analyzed or colony size. Significant year-to-year variation (2007–2008 to 2008–2009) in the distribution of δ2Hhair for two sites in Tennessee was observed. Currently, hibernacula considered important for species conservation are largely determined by population size, but our results suggest that migratory diversity should also be considered.

scholarly journals Stable isotope data of daily precipitation during the period of 2013-2017 from K-puszta (regional background monitoring station), Hungary

Data in Brief ◽  
2021 ◽  
pp. 106962
Author(s):  
György Czuppon ◽  
Emese Bottyán ◽  
Erzsébet Kristóf ◽  
Tamás Weidinger ◽  
László Haszpra ◽  
...  
Keyword(s):  
Stable Isotope ◽  
Daily Precipitation ◽  
Monitoring Station ◽  
Isotope Data ◽  
Regional Background ◽  
Stable Isotope Data

Vitamin A Value of Plant Food Provitamin A - Evaluated by the Stable Isotope Technologies

2014 ◽  
Vol 84 (Supplement 1) ◽  
pp. 25-29 ◽  
Author(s):  
Guangwen Tang
Keyword(s):  
Stable Isotope ◽  
Vitamin A ◽  
Provitamin A ◽  
Animal Origin ◽  
Plant Food ◽  
Plant Foods ◽  
A Value ◽  
Provitamin A Carotenoids ◽  
Β Carotene

Humans need vitamin A and obtain essential vitamin A by conversion of plant foods rich in provitamin A and/or absorption of preformed vitamin A from foods of animal origin. The determination of the vitamin A value of plant foods rich in provitamin A is important but has challenges. The aim of this paper is to review the progress over last 80 years following the discovery on the conversion of β-carotene to vitamin A and the various techniques including stable isotope technologies that have been developed to determine vitamin A values of plant provitamin A (mainly β-carotene). These include applications from using radioactive β-carotene and vitamin A, depletion-repletion with vitamin A and β-carotene, and measuring postprandial chylomicron fractions after feeding a β-carotene rich diet, to using stable isotopes as tracers to follow the absorption and conversion of plant food provitamin A carotenoids (mainly β-carotene) in humans. These approaches have greatly promoted our understanding of the absorption and conversion of β-carotene to vitamin A. Stable isotope labeled plant foods are useful for determining the overall bioavailability of provitamin A carotenoids from specific foods. Locally obtained plant foods can provide vitamin A and prevent deficiency of vitamin A, a remaining worldwide concern.

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