Assigning birds to geographic origin using feather hydrogen isotope ratios (δ2H): importance of year, age, and habitat

2012 ◽  
Vol 90 (6) ◽  
pp. 722-728 ◽  
Author(s):  
S. Haché ◽  
K.A. Hobson ◽  
M.-A. Villard ◽  
E.M. Bayne
Keyword(s):  
Hydrogen Isotope ◽  
Geographical Origin ◽  
Geographic Origin ◽  
Habitat Type ◽  
Growing Season ◽  
Global Network ◽  
Annual Variations ◽  
Sources Of Variation ◽  
Seiurus Aurocapilla ◽  
Hydrogen Isotope Ratios

In North America, gradients in the ratio of stable hydrogen isotopes in amount-weighted, growing-season mean precipitation (2H:1H; depicted as δ2Hp) form a largely latitude-sensitive isoscape that can be used to estimate the geographical origin of animals. Feathers are metabolically inert following growth and δ2Hf values retain information on geographical origins. However, there are important assumptions underlying this approach that can only be tested using birds of known origin. Here, we investigated sources of variation in δ2Hf measurements from Ovenbirds ( Seiurus aurocapilla (L., 1766)) associated with year, age class, feather type, season, and habitat type in New Brunswick, Canada. The observed δ2Hf generally followed that predicted from the Global Network of Isotopes in Precipitation database. However, we found a strong year × age interaction on δ2Hf. Season, habitat type, and feather type explained only a small portion of the overall variation in δ2Hf. These results show the advantages of using annual δ2Hp isoscapes and age-specific corrections when converting δ2Hp to δ2Hf. We submit that the interaction effect can be modeled by accounting for interannual variation in the amount of precipitation during the breeding season. These procedures will allow for more precise estimates of the geographical origin of individual birds, especially for studies conducted near oceanic coasts, which are subject to significant annual variations in growing season δ2Hp.

Stable hydrogen isotope ratios of lignin methoxyl groups as a paleoclimate proxy and constraint of the geographical origin of wood

2007 ◽  
Vol 176 (3) ◽  
pp. 600-609 ◽  
Author(s):  
Frank Keppler ◽  
David B. Harper ◽  
Robert M. Kalin ◽  
Wolfram Meier-Augenstein ◽  
Nicola Farmer ◽  
...  
Keyword(s):  
Hydrogen Isotope ◽  
Geographical Origin ◽  
Isotope Ratios ◽  
Stable Hydrogen Isotope ◽  
Hydrogen Isotope Ratios ◽  
Paleoclimate Proxy

scholarly journals Contamination of the Bushveld Complex (South Africa) magmas by basinal brines: Stable isotopes in phlogopite from the UG2 chromitite

Geology ◽  
2021 ◽  
Author(s):  
Haoyang Zhou ◽  
Robert B. Trumbull ◽  
Ilya V. Veksler ◽  
Ilya N. Bindeman ◽  
Johannes Glodny ◽  
...  
Keyword(s):  
South Africa ◽  
Stable Isotopes ◽  
Hydrogen Isotope ◽  
Bushveld Complex ◽  
Isotope Ratios ◽  
Second Step ◽  
Merensky Reef ◽  
Oxygen Isotope Ratios ◽  
Abundant Evidence ◽  
Hydrogen Isotope Ratios

There is abundant evidence for significant H2O in evolved melts from the platinum-rich UG2 chromitite and the Merensky Reef of the Bushveld Complex (South Africa), but there is no consensus about the source of H2O. We report triple-oxygen and hydrogen isotope ratios of interstitial, late-magmatic phlogopite from three localities of the UG2 layer. The phlogopite yielded δD values of –43‰ to –23‰, which is >30‰ higher than previously known from Bushveld rocks and far above the mantle values of ~–75‰. The phlogopite triple-oxygen isotope ratios are the first to be reported for Bushveld rocks, with values of Δ′17O0.5305 (17O excess relative to the reference line 0.5305) from –0.069‰ to –0.044‰ (δ18O 5.2‰–6.2‰). The oxygen data support existing models of as much as 30%–40% contamination of mantlederived magmas in the lower to middle crust. However, the high δ values require a second step of contamination, which we attribute to brines from the marine sediments in the Transvaal Basin at the emplacement level.

scholarly journals First Glimpse of Gut Microbiota of Quarantine Insects in China

2020 ◽  
Author(s):  
Yanxue Yu ◽  
Qi Wang ◽  
Ping Zhou ◽  
Na Lv ◽  
Wei Li ◽  
...  
Keyword(s):  
Environmental Factors ◽  
Gut Microbiota ◽  
Geographical Origin ◽  
Geographic Origin ◽  
Insect Species ◽  
Monitoring Method ◽  
Geographical Source ◽  
Insect Gut ◽  
Tracing Method ◽  
New Habitats

AbstractQuarantine insects are economically important pests that frequently invade new habitats. A rapid and accurate monitoring method to trace the geographical source of invaders is therefore needed for prevention, detection, and eradication. Current methods based on insect genetics are often too slow. We developed a novel tracing method based on insect gut microbiota. The source location of microbiota of insects can be used to rapidly determine the insects’ geographic origin. We analyzed 179 gut microbiota samples belonging to 591 individuals of 22 quarantine insect species collected from 36 regions in China and abroad. The gut microbiotas of these insects mainly included Actinobacteria, Bacteroidetes, Cyanobacteria, Firmicutes, Proteobacteria, and Tenericutes. The diversity of the insect gut microbiota was closely related to geographic and environmental factors. Different insect species could be distinguished at the phylum level of microbiota. Populations of individual insect species from different regions could be distinguished at the genus level of microbiota. A method for determining the geographical origin of invasive insect species was tentatively established, but its practical applicability requires further study.

scholarly journals Annual variations in the microflora of some varieties of Finnish malting barley

1995 ◽  
Vol 4 (4) ◽  
pp. 407-418
Author(s):  
Tapani Tuominen ◽  
Heikki Rosenqvist
Keyword(s):  
Plant Hormone ◽  
Growing Season ◽  
Fungal Species ◽  
Consistent Difference ◽  
Malting Barley ◽  
Microbial Infection ◽  
Microbial Counts ◽  
Annual Variations ◽  
Average Rainfall ◽  
Indole 3 Acetic Acid

Three major Finnish malting barley varieties were studied for annual variations in the incidence of seed-derived fungi, bacteria and actinomycetes. In 1990-1992, 114 characterized fungal, 59 uncharacterized bacterial and 12 uncharacterized actinomycetal isolates were extracted from samples of seed intended for use in malting. When the yield of the plant hormone, indole-3-acetic acid (lAA), from enriched microbial cultures was weighed against the microbial biomass and the endogenous lAA concentration of the barley harvests, it was concluded that potential exists for bacterial lAA production in biologically significant amounts, given some minor annual variations. As expected from the average rainfall and temperature during the growing season, microbial counts in all cultivars were highest in 1992. Most of the fungal species found were of saphrophytic character, and field fungi were dominant in the samples. On the whole, microbial counts and spectra in all samples confirmed that each harvest of all cultivars was of good vigour and well suited for malting purposes. Strains of plant pathogenic character included species of Septoria nodorum (Berk) Berk, Drechlera teres (Sacc) Subraim & Jain, D. sorokiniana (Sacc) Subram & Jain and D. graminea (Rab.) Shoem. A consistent difference was noted in the microbial infection severities of the cultivars.

BITTER VETCH, OR ERVIL (VICIA ERVILIA (L.) WILLD.): EVALUATION OF ACCESSIONS IN THE ENVIRONMENTS OF TAMBOV PROVINCE, RUSSIAN FEDERATION

2021 ◽  
Author(s):  
E.A. SERGEEV ◽  
◽  
N.N. ANDREEVA ◽  
N.V. VAVKINA ◽  
T.G. ALEKSANDROVA ◽  
...  
Keyword(s):  
Plant Breeding ◽  
Genetic Resources ◽  
Seed Yield ◽  
Russian Federation ◽  
Plant Genetic Resources ◽  
Geographic Origin ◽  
Weather Conditions ◽  
Growing Season ◽  
Evaluation Data ◽  
Bitter Vetch

The catalogue contains the evaluation data for 267 bitter vetch accessions from the collection held by the N.I. Vavilov All-Russian Institute of Plant Genetic Resources (VIR), grown in 2010–2016 and 2021 at Yekaterinino Experiment Station of VIR. The study covered bitter vetch accessions of diverse geographic origin from 23 countries. The testing of Vicia ervilia accessions in years with different weather conditions showed the variability of the main agrobiological characteristics in the studied accessions: duration of the growing season, and seed yield per 1 m². The catalogue is addressed to plant breeding experts.

Sign in / Sign up

Export Citation Format

Share Document