How do life history traits influence the environment’s effect on population synchrony? Insights from European birds and insects DOI Open Access
Ellen C. Martin, Brage Bremset Hansen, Aline Magdalena Lee

et al.

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

Published: Sept. 8, 2023

Abstract Populations closer together in space are more likely to experience shared environmental fluctuations. This correlation experienced conditions is the main driver of spatial population synchrony, defined as tendency for geographically separate populations same species exhibit parallel fluctuations abundance over time. Moran’s theorem states that spatially distinct expected show synchrony their dynamics environment. However, this rarely case wild, and different inhabiting area similar. These species-specific differences how environment synchronizes can be due life history traits make some susceptible stochasticity, such reduced mobility or faster pace life. In study, we compiled long-term annual datasets on European birds insects ( Lepidoptera sp. Bombus sp.) identify (i.e., positively correlated environment, also called Moran effect) affects synchrony. As expected, synchronized both insects. experiencing precipitation temperature had higher growth rates. Birds were strongly by temperature, while was a stronger birds, with short generation times synchronizing effect compared long times. Moreover, effects depended movement propensity, positive impact resident short-distance migration species. insects, affected propensity dietary niche breadth, but these did not modify Our study provides empirical support prediction influenced stochasticity histories lower life, only birds. By quantifying across levels traits, our improves understanding well factors drive persistence face change.

Language: Английский

Thermal sensitivity and niche plasticity of generalist and specialist leaf-endophytic bacteria in Mangrove Kandelia obovata DOI Creative Commons

Rajapakshalage Thashikala Nethmini,

Huaxian Zhao,

Lianghao Pan

et al.

Communications Biology, Journal Year: 2025, Volume and Issue: 8(1)

Published: Jan. 3, 2025

Leaf endospheres harbor diverse bacterial communities, comprising generalists and specialists, that profoundly affect ecosystem functions. However, the ecological dynamics of generalist specialist leaf-endophytic bacteria their responses to climate change remain poorly understood. We investigated diversity environmental within leaf endosphere mangroves across China. Our findings show a predominance specialists in mangrove endosphere. Temperature is key factor driving community dissimilarity both groups, yet it negatively influences alpha diversity. Soil nutritional factors, particularly phosphate for total organic carbon are critical shaping functional profiles. Interestingly, temperature has limited impact on Stochastic processes govern assembly altering β-nearest taxon indices as temperatures increase. indicate halophytic favors microbial niche specialization, due its unique microenvironment discrete niches, showing thermal sensitivity terms profile. This study provides insights into differentiation adaptation mechanisms endophytic microbes woody halophytes response perturbations. Thermal microbiome reveals distinct adaptations bacteria. Specialists dominate, while significantly drives diversity, impacting resilience.

Language: Английский

Citations

0
Association patterns between farmland abandonment and the non-native Common Waxbill (Estrilda astrild) in the eastern Iberian Peninsula DOI Creative Commons
Pau Lucio-Puig, Rafael Muñoz‐Mas, Virginia Garófano-Goméz

et al.

Journal of Ornithology, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 18, 2025

Language: Английский

Citations

0
Climate change drives range contraction and shapes species distribution in an alpine passerine: caution required when comparing atlas data DOI Creative Commons
Sandro López‐Ramírez, Antonio‐Román Muñoz

Global Ecology and Conservation, Journal Year: 2025, Volume and Issue: unknown, P. e03620 - e03620

Published: May 1, 2025

Language: Английский

Citations

0
Discordancy of two common methods of measuring feather hydrophobicity DOI Creative Commons
Niels Preuk, Chad L. Seewagen

Journal of Avian Biology, Journal Year: 2025, Volume and Issue: 2025(3)

Published: May 1, 2025

Feather structure contributes greatly to a birds' ability repel water, which is essential for thermoregulation and energy use. Water repellency of feathers has traditionally been inferred by measuring structural index based on the distance between feather radii vane. A more direct method measures contact angle water droplet resting pennaceous This used various materials (e.g. textiles) we considered it standard against can be validated. Despite widespread use both techniques, their level agreement with each other not systematically evaluated. Additionally, few studies have tested contribution uropygial oil feather's repellency. We correlation two methods, using from high‐elevation species that are adapted cold wet conditions montane systems, Swainson's thrush Catharus ustulatus Bicknell's C. bicknelli . also compared angles measured before after removing coating oil. found no methods in either species, suggests reliable indicator Removing significantly reduced demonstrating The lack may occurred because infers proxy, whereas directly degree repels water. consider standardizable than index, although requires sophisticated equipment. caution continued highlight role enhancing

Language: Английский

Citations

0
Trends in weather conditions favor generalist over specialist species in rear‐edge alpine bird communities DOI
Miguel de Gabriel Hernando,

Isabel Roa,

Juan Fernández‐Gil

et al.

Ecosphere, Journal Year: 2022, Volume and Issue: 13(4)

Published: April 1, 2022

Abstract Rear‐edge alpine biodiversity is expected to suffer one of the largest ecological impacts due current and foreseen climate change. For highly mobile long‐living species, change might operate through a wide spectrum demographic processes influencing population dynamics, which in turn affect local abundance may eventually lead extinctions drifts actual range. Using community six passerine species breeding zone Cantabrian mountains (Northwest Iberian Peninsula), we sought document changes bird across elevational gradient during last decade, evaluate relationship between climatic conditions (i.e., weather conditions), discuss mechanisms by these be mediating observed trends global warming context. We estimated at home range level using point count transects distance sampling season, fitted generalized linear mixed models describe their temporal gradient. used structural equation modeling approach estimate direct, indirect, total effects variables, while considering correlations causal relationships among them with found that generalist had an overall positive trend abundance, specialist negative highest elevations study period. This pattern was partly explained decrease wind speed rising temperature period, seems have stronger effect on this rear‐edge community. The different ecosystems seem mainly related capacity modulate variations habitat quality feeding resources Thus, context, it necessary gain knowledge modulating dynamics specialists delineate conservation practices safeguard biodiversity.

Language: Английский

Citations

16
Ambient ozone – New threat to birds in mountain ecosystems? DOI
Jiří Reif,

Anna Gamero,

Jiří Flousek

et al.

The Science of The Total Environment, Journal Year: 2023, Volume and Issue: 876, P. 162711 - 162711

Published: March 10, 2023

Language: Английский

Citations

9
Restricted dispersal and inbreeding in a high‐elevation bird across the ‘sky islands’ of the European Alps DOI Creative Commons
Francesco Ceresa, Mattia Brambilla, Laura Kvist

et al.

Journal of Biogeography, Journal Year: 2023, Volume and Issue: 51(5), P. 853 - 868

Published: Dec. 29, 2023

Abstract Aim High‐elevation specialist species are threatened by climate change and habitat loss, their distributions becoming increasingly reduced fragmented. In such a context, dispersal ability is crucial to maintain gene flow among patches of suitable habitat. However, information about often lacking for these species, especially those taxa that usually considered as good dispersers birds. We adopted landscape genomics approach investigate in climate‐sensitive high‐elevation bird. Our aims were assess the levels within wide mountain area, effects geographic distance characteristics on dispersal, testing isolation (IBD) hypothesis against resistance (IBR) hypothesis. Location European Alps. Taxon Montifringilla nivalis. Methods sampled individuals from several breeding areas obtained single nucleotide polymorphism (SNP) data ddRAD sequencing. then calculated site‐ individual level genetic distances inbreeding coefficients. To test IBD versus IBR, we related both different measures using maximum likelihood population models. Results Gene was partly restricted, found support IBD, indicating limits snowfinch dispersal. Spatial patterns suggested philopatry strongly contributed determine observed IBD. High coefficients indicated frequent mating relatives. Main Conclusions Restricted ‘sky island’ systems can also occur highly mobile because potential cover very large be counteracted high likely costs. will hinder future more restricted fragmented range, increasing risks local extinctions.

Language: Английский

Citations

8
Density Estimates and Habitat Preferences of Two Sympatric Bird Species as Potential Bioindicators of Tropical Forest Alterations DOI Creative Commons
Dayron Lopez, Federica Fonda, Flavio Monti

et al.

Diversity, Journal Year: 2023, Volume and Issue: 15(2), P. 208 - 208

Published: Feb. 2, 2023

Forestry management can shape the structure of habitat types and have important biological consequences on composition biodiversity. This study focused Momotus lessonii Eumomota superciliosa, two potential bioindicators local wide scale tropical forest alterations. The took place in Karen Mogensen Wildlife Refuge (Costa Rica), a protected area characterized by main habitats where species coexist, i.e., primary moist second-growth dry forest. A distance sampling method was used to obtain density estimates for each species. spot mapping approach showed an apparent partitioning at site. Kilometric Abundance Index (KAI) statistical analyses revealed significant differences between habitats, E. superciliosa tended be more abundant preferred forest, whilst M. favored environments. development arid semi-arid environments open areas will probably lead numerical increase with consequent expansion, while decline moister homogeneously forested likely affect negatively lessonii. We argue that these birds act as global environmental changes, their monitoring enable appropriate decisions conservation purposes.

Language: Английский

Citations

5
South European mountain butterflies at a high risk from land abandonment and amplified effects of climate change DOI Creative Commons
Amparo Mora, Andrew Wilby, Rosa Menéndez

et al.

Insect Conservation and Diversity, Journal Year: 2023, Volume and Issue: 16(6), P. 838 - 852

Published: Aug. 10, 2023

Abstract Data from existing monitoring schemes point to a global crisis of butterflies across Europe, with habitat loss/degradation, climate change and chemical pollution as the main drivers decline. The butterfly time series Western Europe come densely populated, relatively flat areas. However, population trends less populated areas, such mountain ranges in south have been studied, despite these areas harbouring one highest biodiversity continent. Here, we analyse for populations Southwestern range (Picos de Europa, Northwest Spain), last 9 years (2013–2021), an altitudinal gradient (80–2000 m). We show that this region, protected National Park more than 100 ago, is nonetheless under great threat, decline abundance of, on average, 5.7% per year (45.7% cumulative years). Species at higher elevations are faring worse those low communities mid‐elevations (below tree line) changing towards species preference closed habitats. Combined effects amplified mountains loss, due abandonment traditional management, appear be affecting both individual community composition our study area.

Language: Английский

Citations

4
The diverse diet of southern Alaska resident killer whales changes across spatiotemporally distinct foraging aggregations DOI Creative Commons
Hannah J. Myers, Daniel H. Olsen,

Amy Van Cise

et al.

bioRxiv (Cold Spring Harbor Laboratory), Journal Year: 2024, Volume and Issue: unknown

Published: Sept. 16, 2024

Abstract Top predators influence ecological communities in part through the prey they consume, which often track cycles of seasonal and geographic abundance. Killer whales are top marine ecosystem. In North Pacific, have diverged into three distinct lineages with different diets, fish-eating type is most abundant. this study, we examine diet southern Alaska resident killer whale population across major foraging aggregations. We take advantage two unique sampling methods to reveal strong spatiotemporal patterns from May September. Chinook, chum, coho salmon were each dominant locations times, substantial dietary contributions Pacific halibut, arrowtooth flounder, sablefish. The diverse, location-specific, nature feeding habits predator highlights importance broad population-level scales.

Language: Английский

Citations

1