Combining stable isotope ratios with elemental concentrations to improve the estimation of terrestrial carnivore diets DOI Creative Commons
Garth Mowat, Douglas C. Heard,

P. Jeff Curtis

et al.

Global Ecology and Conservation, Journal Year: 2023, Volume and Issue: 45, P. e02507 - e02507

Published: May 15, 2023

Stable isotopes of animal tissue have been used to estimate diet for many consumer species and places, but the ability assign contributions all food items is limited by number tracers used, separation tracer data among dietary sources. We tested whether we could detect caribou (Rangifer tarandus) in individual predators southwest Canada, where are endangered. The between that other common prey was minimal using C13 N15 isotope ratios our confidence assigning fraction correctly low despite testing several fractionation values priors. measured concentration a suite elements lichen, large investigate use an elemental as better fraction, because these were known be more abundant major winter. Strontium cesium had higher concentrations, when normalized salt (we chose calcium), than measured; this also true strontium ratios. appeared overestimate however, suggest addition either cation yield finer accurate estimates terrestrial after further investigation. ratio investigation may equally informative require less pre-work, one (Sr87/Sr86) has already well studied.

Language: Английский

A trans-oceanic flight of over 4,200 km by painted lady butterflies DOI Creative Commons
Tomasz Suchan, Clément P. Bataille, Megan S. Reich

et al.

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: June 25, 2024

The extent of aerial flows insects circulating around the planet and their impact on ecosystems biogeography remain enigmatic because methodological challenges. Here we report a transatlantic crossing by Vanessa cardui butterflies spanning at least 4200 km, from West Africa to South America (French Guiana) lasting between 5 8 days. Even more, infer likely natal origin for these individuals in Western Europe, journey Europe-Africa-South could expand 7000 km or more. This discovery was possible through an integrative approach, including coastal field surveys, wind trajectory modelling, genomics, pollen metabarcoding, ecological niche multi-isotope geolocation origins. overall journey, which energetically feasible only if assisted winds, is among longest documented individual insects, potentially first verified crossing. Our findings suggest that may be underestimating transoceanic dispersal highlight importance highways connecting continents trade winds.

Language: Английский

Citations

15
Isotope geolocation and population genomics in Vanessa cardui: Short- and long-distance migrants are genetically undifferentiated DOI Creative Commons
Megan S. Reich, Daria Shipilina, Venkat Talla

et al.

PNAS Nexus, Journal Year: 2025, Volume and Issue: 4(2)

Published: Feb. 1, 2025

Abstract The painted lady butterfly Vanessa cardui is renowned for its virtually cosmopolitan distribution and the remarkable long-distance migrations as part of annual, multigenerational migratory cycle. In winter, V. individuals inhabit breeding grounds north south Sahara, suggesting distinct behaviors within species migrate southward from Europe in autumn. However, evolutionary ecological factors shaping these differences behavior remain largely unexplored. Here, we performed whole-genome resequencing analyzed hydrogen strontium isotopes 40 simultaneously collected autumn regions both Sahara. Our investigation revealed two main groups: (i) short-distance migrants, journeying temperate to circum-Mediterranean region (ii) originating Europe, crossing Mediterranean Sea reaching West Africa, covering up over 4,000 km. Despite stark migration distance, a genome-wide analysis that short- migrants belong single intercontinental panmictic population extending northern sub-Saharan Africa. Contrary common biogeographic patterns, Sahara not catalyst structuring this species. No significant genetic differentiation or signs adaptation selection were observed between phenotypes. Nonetheless, individuals, who early arrivals Africa longer distances, exhibited some differentiation. lack structure suggests distance plastic response environmental conditions.

Language: Английский

Citations

1
Pollen metabarcoding reveals the origin and multigenerational migratory pathway of an intercontinental-scale butterfly outbreak DOI

Johanna Luise Gorki,

Roger López-Mañas, Llorenç Sáez

et al.

Current Biology, Journal Year: 2024, Volume and Issue: 34(12), P. 2684 - 2692.e6

Published: June 1, 2024

Language: Английский

Citations

8
A comprehensive review of long‐distance hover fly migration (Diptera: Syrphidae) DOI Creative Commons
Samm K. Reynolds, C. Scott Clem,

Blair Fitz‐Gerald

et al.

Ecological Entomology, Journal Year: 2024, Volume and Issue: 49(6), P. 749 - 767

Published: Aug. 24, 2024

Abstract Hover flies (Diptera: Syrphidae) are a group of insects containing many migratory species that provide critical ecosystem services including pollination, decomposition and biological control. Their behaviour remains largely overlooked unacknowledged, but an influx contemporary research is beginning to shift this. The goal this review summarise synthesise the past 150+ years global hover fly migration from over 50 papers in multiple languages. Here, we comprehensive evidence for through lens methodologies used studying these phenomena, mechanisms associated ecological economic impacts. We also include inventory all recognised discuss taxonomic patterns. In total, compiled accounts 46 considered migratory, most which were sourced Europe. Recent reports, however, have described North America, Asia, Middle East Australia. Approximately 70% subfamily Syrphinae, important control agents. has substantial impacts on may be linked long‐distance gene flow angiosperms via pollen transportation. These likely redistributing at continental scale annual basis, major repercussions management crop pests such as aphids. sensitivity anthropogenic not well known, shifting climatic conditions, pollution increased habitat fragmentation impactful should further explored. Despite recent advances interest subject, understudied knowledge gaps continue persist.

Language: Английский

Citations

4
Trans-Saharan migratory patterns in Vanessa cardui and evidence for a southward leapfrog migration DOI Creative Commons
Megan S. Reich,

Sana Ghouri,

Samantha Zabudsky

et al.

iScience, Journal Year: 2024, Volume and Issue: 27(12), P. 111342 - 111342

Published: Nov. 8, 2024

Some insects, such as the painted lady butterfly

Language: Английский

Citations

2
Characterizing eastern spruce budworm’s large-scale dispersal events through flight behavior and stable isotope analyses DOI Creative Commons
Felipe Dargent, Jean‐Noël Candau, Kala Studens

et al.

Frontiers in Ecology and Evolution, Journal Year: 2023, Volume and Issue: 11

Published: March 16, 2023

Eastern spruce budworm moth ( Choristoneura fumiferana (Clem.)) mass outbreaks have widespread economic and ecological consequences. A key explanation for the large-scale spread synchronization of these is long-distance dispersal (up to 450 km) moths from hotspots (high-density populations) lower-density areas. These events proved difficult monitor because flights occur only a few times year, no consistent routes, commonly used tracking methods (e.g., population genetics, mark-recapture, radio telemetry) are inadequate this system. Confirming immigration distinguishing between local immigrant individuals crucial steps in identifying physical drivers dispersal. Here, we test whether isotopes hydrogen (i.e., delta notation: δ 2 H) strontium isotope ratios: 87 Sr/ 86 Sr), known independently vary space predictable manner, can be show that an event occurred distinguish adult moths. We automated pheromone trap system collect at six different sites eastern Canada within outside current outbreak area first use flight behavior time capture, currently best available tool, determine putative vs. status, then evaluate individual Sr H differ classes. At two sites, detect significantly locals thus confirm has occurred. Saliently, where were sampled before occurrence potential (~10 days) showed strongest differences individuals’ values. Sites collection was close (hours) or following (days) had less-clear distinction immigrants locals, signs mixing groups. speculate recent could led misclassification as locals. data generally support adequacy approaches using capture-time events, provide enhanced resolution event. discuss broader implication adding toolkit suggest next implementing tools.

Language: Английский

Citations

5
Isotope geolocation and population genomics inVanessa cardui:Short- and long-distance migrants are genetically undifferentiated DOI Open Access
Megan S. Reich, Daria Shipilina, Venkat Talla

et al.

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2023, Volume and Issue: unknown

Published: Dec. 10, 2023

Abstract The painted lady butterfly Vanessa cardui is renowned for its virtually cosmopolitan distribution and the remarkable long-distance migrations that are part of annual, multi-generational migratory cycle. Recently, V. individuals were found north south Sahara in autumn, suggesting distinct behaviours within species. However, evolutionary ecological factors shaping these differences behaviour remain largely unexplored. Here, we performed whole-genome resequencing analysed hydrogen strontium isotopes 40 simultaneously collected autumn from regions both Sahara. Our investigation revealed two main groups: (i) short-distance migrants, journeying temperate Europe to circum-Mediterranean region (ii) originating Europe, crossing Mediterranean Sea Sahara, reaching West Africa, covering up over 4,000 km. Despite stark migration distance, a genome-wide analysis short- migrants belong single intercontinental panmictic population extending northern sub-Saharan Africa. Contrary common biogeographic patterns, not catalyst structuring this No significant genetic differentiation or signs adaptation selection observed between phenotypes (pairwise F ST = 0.001 ± 0.006). Nonetheless, individuals, which early arrivals Africa covered longer distances, exhibited some differentiation. lack structure suggests distance plastic response environmental conditions. Significance statement Although insects dominate living biomass fluxes impact agriculture, ecosystems, human communities, little known about controls their behavior. study develops an interdisciplinary framework, applied V.cardui , explore basis variation insect We leverage new generation isotope geolocation techniques uncover striking behaviour, with migrating short distances others thousands kilometers across This major difference does coincide likely cues. provides ground-breaking framework insects.

Language: Английский

Citations

1
Invertebrates Are Heavy Metal: An Overview of Armor, Weapons, and Other Cuticular Adaptations of Diverse Lineages DOI
Matthew S. Lehnert

Biologically-inspired systems, Journal Year: 2024, Volume and Issue: unknown, P. 1 - 25

Published: Jan. 1, 2024

Language: Английский

Citations

0
Combining stable isotope ratios with elemental concentrations to improve the estimation of terrestrial carnivore diets DOI Creative Commons
Garth Mowat, Douglas C. Heard,

P. Jeff Curtis

et al.

Global Ecology and Conservation, Journal Year: 2023, Volume and Issue: 45, P. e02507 - e02507

Published: May 15, 2023

Stable isotopes of animal tissue have been used to estimate diet for many consumer species and places, but the ability assign contributions all food items is limited by number tracers used, separation tracer data among dietary sources. We tested whether we could detect caribou (Rangifer tarandus) in individual predators southwest Canada, where are endangered. The between that other common prey was minimal using C13 N15 isotope ratios our confidence assigning fraction correctly low despite testing several fractionation values priors. measured concentration a suite elements lichen, large investigate use an elemental as better fraction, because these were known be more abundant major winter. Strontium cesium had higher concentrations, when normalized salt (we chose calcium), than measured; this also true strontium ratios. appeared overestimate however, suggest addition either cation yield finer accurate estimates terrestrial after further investigation. ratio investigation may equally informative require less pre-work, one (Sr87/Sr86) has already well studied.

Language: Английский

Citations

0