Disproportionate declines of formerly abundant species underlie insect loss

Nature, Год журнала: 2023, Номер 628(8007), С. 359 - 364

Опубликована: Дек. 20, 2023

Abstract Studies have reported widespread declines in terrestrial insect abundances recent years 1–4 , but trends other biodiversity metrics are less clear-cut 5–7 . Here we examined long-term 923 assemblages monitored 106 studies, and found concomitant abundance species richness. For studies that were resolved to level (551 sites 57 studies), observed a decline the number of initially abundant through time, not very rare species. At population level, most at start time series showed strongest average (corrected for regression-to-the-mean effects). Rarer were, on average, also declining, these offset by increases Our results suggest decreases total 2 can mostly be explained formerly This counters common narrative loss is characterized 8,9 Although our fundamental changes occurring assemblages, it important recognize they represent only from those locations which sufficient data available. Nevertheless, given importance ecosystems 10 their general likely broad repercussions food webs ecosystem functioning.

Язык: Английский

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The effects of urbanization on pollinators and pollination: A meta‐analysis

Ecology Letters, Год журнала: 2023, Номер 26(9), С. 1629 - 1642

Опубликована: Июнь 22, 2023

Urbanization is increasing worldwide, with major impacts on biodiversity, species interactions and ecosystem functioning. Pollination an function vital for terrestrial ecosystems food security; however, the processes underlying patterns of pollinator diversity services they provide in cities have seldom been quantified. Here, we perform a comprehensive meta-analysis 133 studies examining effects urbanization pollinators pollination. Our results confirm widespread negative richness abundance, Lepidoptera being most affected group. Furthermore, responses were found to be trait-specific, below-ground nesting solitary Hymenoptera, spring flyers more severely by urbanization. Meanwhile, promote non-native pollinators, which may exacerbate conservation risks native species. Surprisingly, despite diversity, pollination service measured as seed set enhanced non-tropical likely due abundant generalists managed therein. We emphasize that local flowering plants could mitigate diversity. Overall, demonstrate varying magnitudes multiple moderators urban help guide actions biodiversity sustainable future.

Язык: Английский

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Further evidence for a global decline of the entomofauna

Austral Entomology, Год журнала: 2020, Номер 60(1), С. 9 - 26

Опубликована: Дек. 17, 2020

Abstract The Anthropocene is characterised by pervasive human‐inflicted impacts on a broad range of biota, including insects. In 2019, we reviewed scientific literature quantifying the prevalence and magnitude insect declines in recent time. Here, drawing upon 40 additional long‐term studies, add evidence that consistent with our earlier review some other reviews fate populations globally. New data for Greenland, northern Africa, South America, eastern Asia Australia complement studies from Europe North America. Temporal trends are now derived 100 refer mainly to past three or four decades (median 33 years). Data 10 major taxonomic orders indicate an average 37% species declining numbers, while 18% increasing; latter taxa involve agricultural herbivores nuisance pests. Population changes more pronounced among aquatic communities, where 42% 29% increasing. Such result decrease biomass across taxa, except Heteroptera. Changes richness diversity indices inconsistent do not reflect intraspecific population over These observed irrespective taxon, geography methodological approach, although lack monitoring records prevents proper assessment tropical regions.

Язык: Английский

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Terrestrial insects as a promising source of chitosan and recent developments in its application for various industries

Food Chemistry, Год журнала: 2021, Номер 373, С. 131407 - 131407

Опубликована: Окт. 19, 2021

Язык: Английский

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Insect decline in Brazil: an appraisal of current evidence

Biology Letters, Год журнала: 2022, Номер 18(8)

Опубликована: Авг. 1, 2022

Recent reviews of data on worldwide insect decline include almost no information Brazil. We gathered evidence from literature searches and a survey sent to researchers, which 96 replied 56 provided publications. present 75 instances trends recorded over an average span 11 years for aquatic 22 terrestrial insects. These time-replicated samples expert opinion based long-term local collections. Most are butterflies, bees scarab beetles. Aquatic studies several orders, usually sorted genus or family. Terrestrial insects showed significantly more cases declines than increases, both in abundance (17 : 3) diversity (11 1). In cases, tendency was detected (2 2) (3 4), not counting with trend. Differences these results among habitats may be due the shorter less change environmental conditions surveys, included sites already degraded before sampling. offer guidelines future assessments, including resampling legacy collection sites.

Язык: Английский

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How city traits affect taxonomic and functional diversity of urban wild bee communities: insights from a worldwide analysis

Apidologie, Год журнала: 2022, Номер 53(4)

Опубликована: Авг. 1, 2022

Abstract Land-use change, including urbanization, is known to affect wild bee (Hymenoptera: Apoidea) diversity. However, while previous studies have focused on differences across local urbanization gradients, the best of our knowledge, none among cities at a wide geographical scale. We here used published data for communities in 55 globe, order explore how city traits (population density, size, climate and land-use parameters) both taxonomic (diversity, distinctness, dominance) functional (body nesting strategy, sociality, plant host specialization) profile urban communities. By controlling sample size sampling effort, we found that bigger few parasitic oligolectic species, along with more above-ground-nesting bees. Cities highly fragmented green areas present lower proportion species higher social large-bodied impervious surfaces seem below-ground-nesting Hotter richness diversity, diversity highest intermediate precipitation values. Overall, it seems high levels urbanization—through habitat modification “heat island” effect—lead strong simplification cities. Our results may help explain previously observed variable response some community gradients.

Язык: Английский

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Functional leaf and plant use by leafcutter bees: Implications for management and conservation

Ecological Applications, Год журнала: 2025, Номер 35(1)

Опубликована: Янв. 1, 2025

Abstract Wild solitary bees face a host of challenges from the simplification landscapes and biodiversity loss to invasive species urbanization. Pollinator researchers restoration workers thus far gave much attention increase flower cover reduce impact these anthropogenic pressures. Over 30% bee need nonfloral resources such as leaves resin for their survival reproduction. However, importance in ecology, particularly leafcutter bees, has received very little attention. Leafcutter have global distribution cut constructing brood chambers. We information (a) what use do not foraging (b) leaf plant traits community drive preference usage. To fill this gap recommend plants conservation, we examined 13,062 612 107 families distributed 165 communities nine towns/cities four south Indian states. The locations states was quite dissimilar, but had similar proportion native exotic plants. probability foraged is governed by its clade, family, nativity, dimension, width. Bees clear common families, Fabaceae, Phyllanthaceae, Meliaceae leaves, going distant lineages, including rare rare. At same time, also avoided several cosmopolitan Apocynaceae, Moraceae, Sapotaceae, Asteraceae, among others. preferred more usage predicted richness, Fabaceae communities, herbs; diversity abundance are crucial drivers. Our study suggests that bees' leaf‐foraging random, leaf, plant, traits. helpful planning urban homestead greening projects they dominated exotics.

Язык: Английский

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Beneath the buzz: Quantifying nest locations and densities of ground‐nesting wild bees (Hymenoptera: Anthophila)

Methods in Ecology and Evolution, Год журнала: 2025, Номер unknown

Опубликована: Май 24, 2025

Abstract Wild bees (Hymenoptera: Anthophila) are important pollinators and essential for maintaining ecosystem health. The majority of bee species ground‐nesting, all spend most their lifetime inside the nest. Still, studies monitoring schemes assess wild during flower visitation, allowing no conclusion about nest sites. Methods locating assessing ground nests currently limited, hindering scientific progress conservation efforts. To evaluate improve methods nests, we combined information from a literature review our own empirical studies. ranging established field (visual observations emergence traps) to new technological approaches (marking tracking individuals) compared in terms success catching nesting identifying locations, time effort required implement methods, limitations. We provide guidelines recommendations on use different depending data requirements study locations. also present novel trap design two newly developed marking using radioactive tracer substance retroreflective pigment, show that these can be used successfully locate ground‐nesting habitats bees. With this work, address gaps current research aim enhance efficiency explicitly targets sites various environments. By providing comprehensive overview researchers practitioners, demonstrate how knowledge ecology life history thus support efforts conservation.

Язык: Английский

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Urban native vegetation remnants support more diverse native bee communities than residential gardens in Australia's southwest biodiversity hotspot

Biological Conservation, Год журнала: 2021, Номер 265, С. 109408 - 109408

Опубликована: Дек. 21, 2021

Язык: Английский

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Bees in the city: Findings from a scoping review and recommendations for urban planning

AMBIO, Год журнала: 2024, Номер unknown

Опубликована: Май 20, 2024

Over the last decades, bee biodiversity has dropped sharply due to land use change, including urbanization. To contrast this, recent research pointed cities as a hotspot for bees. Because of this ambiguity, scoping review been conducted examine urban characteristics that impact bees and how are impacted. A total 276 articles were analyzed against landscape local habitat characteristics. The key findings include first natural areas more valuable since levels higher. Second, generally score better than agricultural rural areas. Third, plant positively influences biodiversity. Fourth, environment strongly affects some traits proportion native For making friendly inclusive, we recommend maintain areas, connect ecosystems, encourage floral abundance diversity increasing size green overall.

Язык: Английский

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