Composition of breeding bird communities under different intensities of human activity: A case study in Jiulingshan Nature Reserve in eastern China

Acta Oecologica, Journal Year: 2025, Volume and Issue: 126, P. 104061 - 104061

Published: Feb. 11, 2025

Language: Английский

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Tropical Ant Communities Under Agroforestry Can Be Diverse but Lack Trait‐and‐Environment Associations

Biotropica, Journal Year: 2025, Volume and Issue: 57(3)

Published: April 17, 2025

ABSTRACT Human land use often alters community composition that affects many related ecosystem functions. However, intermediate‐intensity use, such as agroforestry, can be a refuge for biodiversity and maintain functions services in working landscapes. We quantified how the alpha beta diversity of ants (Hymenoptera: Formicidae) vary with human Kodagu region Western Ghats, India, across four types (forests, forest fragments, two coffee plantations either native or non‐native shade trees). studied ants, they perform wide range ecological predation, herbivory, seed dispersal, decomposition, etc., also assessed functional estimated interactions between their traits environment. found plantations, on average, had 26% lower species richness than forests was 31% plantations. showed higher at both taxonomic levels. Interestingly, turnover by 32% 24% levels, respectively. Plantations weak few ants' trait‐and‐environment interactions, suggesting environmental filters may not influential structuring ant communities under compared to forests. Overall, while differ from those forests, heterogeneous able similar Our findings highlight importance agroforestry landscapes which

Language: Английский

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Response trait diversity and species asynchrony underlie the diversity–stability relationship in Romanian bird communities

Journal of Animal Ecology, Journal Year: 2023, Volume and Issue: 92(12), P. 2309 - 2322

Published: Oct. 19, 2023

Abstract Biodiversity–stability relationships have frequently been studied in ecology, with the recent integration of traits to explain community stability over time. Classical theory underlying biodiversity–stability relationship posits that different species' responses environment should stabilise community‐level properties (e.g. biomass or abundance) through compensatory dynamics. However, functional response traits, which aim predict how species respond environmental change, are still rarely integrated into studies ecological stability. Such mechanistically drive stability, both terms abundance (functional variability) and composition (compositional variability). In turn, whether compositional scales affect temporal variation effect (a proxy for ecosystem functioning) remains largely unknown, but is key consistent functioning under change. Here, we explore diversity–stability bird communities using annual survey data across 98 sites central Romania, combination global trait databases structural equation models. We show higher diversity promotes variability directly, indirectly via asynchrony. impacts diversity. Multiple facets differ between natural forests agricultural human‐dominated sites, mediated by land cover. Further response‐and‐effect frameworks will enhance understanding drivers biodiversity allowing targeted conservation decision‐making a focus on stable face

Language: Английский

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Trophic plasticity of omnivorous fishes in natural and human‐dominated landscapes

Limnology and Oceanography, Journal Year: 2023, Volume and Issue: 69(1), P. 189 - 202

Published: Nov. 27, 2023

Abstract The persistence of diverse communities and functioning ecosystems under increasing anthropogenic pressure relies on food web rewiring the ability animals to expand or change their diet in disturbed ecosystems. We combined a suite tracing techniques study trophic plasticity omnivorous fishes, ecomorphologically similar species with high competition potential, across different human land uses subtropical streams. found that proportion native forest cover, associated intensive use, altered isotopic composition which were more enriched 13 C, without affecting carbon isotope ratios prey basal resources. There was also evidence for nonlinear effect cover δ 15 N values resources, macroinvertebrates, indicating nutrient pollution from agriculture propagated through stream webs. most widely distributed fish shifted autochthonous resources terrestrial invertebrates sedimentary organic matter Moreover, niche this broader streams higher richness, impacts environmental coexistence. Therefore, our findings showed dominance breadth dominant omnivores depend not only availability but interactions putative competitors.

Language: Английский

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Functional response traits and altered ecological niches drive the disassembly of cloud forest bird communities in tropical montane countrysides

Journal of Animal Ecology, Journal Year: 2022, Volume and Issue: 91(11), P. 2314 - 2328

Published: Sept. 26, 2022

Anthropogenic disturbance contributes to global change by reshaping the ecological niche space available biological communities. Quantifying range of functional response traits required for species persistence is central towards understanding mechanisms underlying community disassembly in disturbed landscapes. We used intensive field surveys cloud forest bird communities across seven replicate landscapes undergoing agricultural conversion Peruvian Andes examine how a suite 16 related morphology, diet, foraging behaviour and environmental breadth predict (1) species-specific abundance changes countryside habitats compared (2) differential occupied Our analyses relied on hierarchical distance sampling models predictors land use gradient while accounting imperfect detection n-dimensional hypervolumes quantify expansion contraction habitats. Key increased early successional mixed-intensity areas included morphological adaptations dense understorey habitats, plant-based diets (flowers, fruit seeds) (3) broad elevational limits habitat breadth. Species occupying mixed high-intensity regimes had mean 20%-60% wider than found within forests. Collectively, expanded diet breadth, contracting dispersal traits. Such were driven with unique trait combinations. results reveal dynamic that underly structure highlight can ameliorate sensitivity generalist species. emphasize be gradients, allowing insights into specific beyond emergent patterns diversity. By identifying key groups align different we demonstrate conservation practitioners contribute retention avian diversity throughout world.La perturbación antropogénica contribuye al cambio remodelar el espacio de nicho ecológico disponible para las comunidades biológicas. Cuantificar la gama rasgos respuesta funcional requeridos persistencia especies es fundamental comprender los mecanismos que subyacen desensamble comunidad en paisajes perturbados. Utilizamos muestreos campo intensivos aves del bosque nublado siete replicados convertidos uso agrícola peruanos examinar cómo un conjunto relacionados con morfología, dieta, comportamiento forrajeo, y amplitud ambiental predicen cambios abundancias específicas agrícolas (“countrysides”) comparación diferenciales ocupado por comunidades. Nuestros análisis se basaron modelos jerárquicos muestreo distancia predictores funcionales abundancia través gradiente suelo agricultura teniendo cuenta detección imperfecta, “n-dimensional hypervolumes” cuantificar expansión contracción hábitats agrícolas. Los clave aumento áreas sucesión temprana intensidad mixta incluyeron adaptaciones morfológicas sotobosque denso, dietas basadas plantas (flores, frutas semillas), amplios límites rango elevación hábitat. Las ocupan regímenes mixto alta tenían promedio más encuentran bosques. En conjunto, expandió dentro relacionadas dieta ambiental, mientras contrajo forrajeo dispersión. Dichos fueron impulsados combinaciones únicos. resultados revelan dinámicos estructura perturbados destacan una mayor puede mejorar sensibilidad perturbaciones generalistas. Enfatizamos pueden utilizarse predecir gradientes perturbación, lo permite específicos allá patrones emergentes diversidad funcional. Al identificar grupos claves alinean diferentes como “countrysides” demostramos profesionales conservación contribuir retención todo mundo.

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What's going to be on the menu with global environmental changes?

Global Change Biology, Journal Year: 2023, Volume and Issue: 29(20), P. 5744 - 5759

Published: July 17, 2023

Ongoing anthropogenic change is altering the planet at an unprecedented rate, threatening biodiversity, and ecosystem functioning. Species are responding to abiotic pressures both individual population levels, with changes affecting trophic interactions through consumptive pathways. Collectively, these impacts alter goods services that natural ecosystems will provide society, as well persistence of all species. Here, we describe physiological behavioral responses species global on levels result in detectable diet across terrestrial marine ecosystems. We illustrate shifts dynamics food webs implications for animal communities. Additionally, highlight myriad tools available researchers investigate consumption patterns interactions, arguing data a crucial component ecological studies change. suggest holistic approach integrating complexities choice environmental drivers may be more robust resolving trends predicting web responses, potentially identifying early warning signs diversity loss. Ultimately, despite growing body long-term datasets, there remains dearth ecology temporal scales, shortcoming must resolved elucidate vulnerabilities changing biophysical conditions.

Language: Английский

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Effects of Land Use Change on Avian Diversity in the Semi-Arid Area of Longxi Loess Plateau

Diversity, Journal Year: 2024, Volume and Issue: 16(4), P. 235 - 235

Published: April 16, 2024

Biodiversity is under threat due to human-induced changes in land use. While various aspects of biodiversity are increasingly studied response these changes, there limited understanding their effects on the structure and composition bird communities dryland regions. We examined impacts use change birds semi-arid area Longxi Loess Plateau by considering taxonomic diversity, functional phylogenetic diversity. analyzed both α- β-diversity avian across different dimensions diversity calculated structures using net relatedness index. Our findings revealed that species richness was highest farmland abandoned farmland, while artificial mixed forests exhibited number unique species. Functional α-diversity greater when compared other four types. Moreover, forests, Caragana korshinskii Platycladus orientalis surpassed typical grasslands, but no differences were observed Regarding β-diversity, turnover patterns dominated multidimensional dissimilarity, with total dissimilarity lower than counterparts higher counterparts. Based present findings, we emphasize long-term cessation ongoing silvicultural initiatives safeguard region Plateau. This crucial for narrowly distributed such as Alectoris magna, they face heightened vulnerability losses.

Language: Английский

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How land use affects freshwater zooplankton communities: a global overview

Hydrobiologia, Journal Year: 2024, Volume and Issue: unknown

Published: June 14, 2024

Language: Английский

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Trophically integrated ecometric models as tools for demonstrating spatial and temporal functional changes in mammal communities

Proceedings of the National Academy of Sciences, Journal Year: 2023, Volume and Issue: 120(7)

Published: Feb. 6, 2023

We are in a modern biodiversity crisis that will restructure community compositions and ecological functions globally. Large mammals, important contributors to ecosystem function, have been affected directly by purposeful extermination indirectly climate land-use changes, yet functional turnover is rarely assessed on global scale using metrics based traits. Using ecometrics, the study of trait distributions turnover, we examine relationship between vegetation cover locomotor traits for artiodactyl carnivoran communities. show ability detect strengthened when both primary consumers (artiodactyls, n = 157 species) secondary (carnivorans, 138 combined into one trophically integrated ecometric model. Overall, 81% communities accurately estimate cover, establishing advantage models over single-group (58 65% correct). develop an innovative approach within ecometrics framework, anomalies evaluate mismatches model estimates observed values provide more nuance understanding relationships cover. apply our five paleontological sites illustrate past today demonstrate utility paleovegetation interpretations. Observed changes their associated vegetations across space time strong, rapid effect environmental filtering Ultimately, captures cascading interactions taxa, traits, changing environments.

Language: Английский

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Effects of overgrazing on the functional diversity of rodents in desert areas

Ecology and Evolution, Journal Year: 2024, Volume and Issue: 14(2)

Published: Feb. 1, 2024

Environmental stressors and disturbances can cause changes in an ecosystem's community structure, which be reflected its functional diversity. As grazing intensity increases, this causes the environment that inevitably lead to especially affect rodents due their sensitivity environment. The effects of prohibition overgrazing on diversity desert rodent communities Alxa were studied April, July, October 2018-2020. trap-day method was used study disturbed habitats. Five traits selected quantified: nutrition, life history, physiology, morphology, activity rhythm. results showed that: (1) species composition Desert spring autumn significantly correlated with hibernation, reproductive cycle, feeding habits. summer only cycle diet. (2) areas have significant temporal spatial characteristics. (3) In summer, made Functional Richness index lower than where is prohibited, but Evenness higher grazing-prohibition areas. autumn, increased decreased index. Divergence grazing-prohibited ones. These suggest that, reduced ecological space utilization ability communities; however, impact degree resources more comprehensive. increases use reduces resource efficiency. Overgrazing makes niche differentiation higher, overlap lower, competition between weaker. Therefore, will through space, utilization, interspecific competition, niche.

Language: Английский

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