New record for endangered species Lasioglossum subfasciatum (Imhoff, 1832) (Hymenoptera, Halictidae) in the Sila National Park (Calabria, Italy)

The European Zoological Journal, Journal Year: 2024, Volume and Issue: 91(1), P. 708 - 713

Published: Jan. 2, 2024

Language: Английский

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Efeito da fragmentação da vegetação sobre a diversidade de abelhas: comparando padrões de resposta em Euglossini e Meliponini

Journal of Environmental Analysis and Progress, Journal Year: 2024, Volume and Issue: 9(3), P. 169 - 178

Published: July 25, 2024

As abelhas são importantes visitantes florais que necessitam de ambientes bem estruturados com diversidade recursos para seu forrageamento. A fauna vem sofrendo declínio espécies devido às mudanças antrópicas dos habitats naturais. O estudo objetivou avaliar se a abertura da vegetação natural afeta as comunidades em áreas Floresta Semidecidual do sudeste Brasil. Nossa hipótese foi gera um efeito borda diferentemente das tribos Euglossini e Meliponini. Esperávamos ocorrência Meliponini fosse maior nas próximas à borda, enquanto fossem mais frequentes distantes borda. realizado na região central estado Minas Gerais, municípios Ouro Preto, Itabirito Sabará. Em cada local amostrada uma área aberta pela faixa servidão linha transmissão onde foram estabelecidos cinco transectos distanciados 0 m, 50 m 100 aberta. Registramos 642 indivíduos 38 abelhas. abundantes Trigona hyalinata (N = 230), spinipes 108) Tetragonisca angustula 86). riqueza abundância significativamente maiores nos abertas (0m), padrão fortemente afetado pelas No entanto, analisando apenas Euglossini, encontramos no transecto distante Nossos resultados corroboram

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Effects of land cover and protected areas on flying insect diversity

Conservation Biology, Journal Year: 2024, Volume and Issue: unknown

Published: Dec. 4, 2024

Abstract Widespread insect losses are a critical global problem. Mitigating this problem requires identifying the principal drivers across different taxa and determining which insects covered by protected areas. However, doing so is hindered missing information on most species owing to extremely high diversity difficulties in morphological identification. To address knowledge gap, we used one of comprehensive DNA metabarcoding data sets assembled (encompassing 31,846 flying species) were collected from network 75 Malaise traps distributed Germany. Collection sites encompass gradients land cover, weather, climate, along with differences site protection status, allowed us gain broader insights into how respond these factors. We examined changes total biomass, richness, temporal turnover, shifts composition taxa, key functional groups (pollinators, threatened species, invasive species), feeding traits. Lower biomass generally equated lower richness all higher suggesting that loss translates biodiversity less stable communities. Spatial variability was primarily driven rather than weather or climate change. As vegetation land‐cover heterogeneity increased, increased 50% 2019 56% 2020 58% 33%, respectively. Similarly, areas low‐vegetation habitats exhibited highest including pollinators widest variety tended be despite their diversity. Our results highlight value heterogeneous low for promoting overall better improved management unforested areas, where many hotspots occur.

Language: Английский

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Islands in the desert for cavity‐nesting bees and wasps: Ecology, patterns of diversity, and conservation at oases of Baja California Peninsula

Ecology and Evolution, Journal Year: 2019, Volume and Issue: 10(1), P. 527 - 542

Published: Dec. 17, 2019

Abstract Aims The oases of Baja California Peninsula (BCP) have been proposed as important hotspots biodiversity that hold an exceptional richness in the middle desert conditions. We tested effect habitat and anthropogenic disturbance on communities cavity‐nesting taxa, with specific emphasis bees, wasps, their natural enemies. Methods In BCP neighbor environments, trap‐nesting taxa were evaluated response to factors affecting nest abundance, richness, community structure. used statistical models find correlates abundance patterns diversity, well ecological analyses determine human species diversity Results Solar irradiation, distance a perennial waterbody relative humidity influenced presence nests, number brood cells, parasitism. general, parasitism higher oases, especially those less disturbance. Bees did not discriminate between deserts nest, whereas mud‐daubing wasps more dependent oases. degree affect occurrence parasitism, but it had adverse intensity (number attacked cells). structure was complex even low‐disturbed sites. similarity sites exceed 30%, proportion shared varied from 2.7% 26.6%. Main conclusions are functioning mesic islands desert, each oasis hosting unique taxa. About 65% nests 50% occurred exclusively oasis. Thus, depend conditions could be threatened if disappear future. Local shaping However, large‐scale such climate can influence seasonality within dwellers. Since loss fragmentation degrade oases’ functionality, strategies maintain ecosystem services pollination biological control should included conservation programs these fragile habitats.

Language: Английский

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Nationwide study of the triple landscape gradient across natural, agricultural and urban areas for the richness of flower-visiting insects

Biological Conservation, Journal Year: 2023, Volume and Issue: 288, P. 110355 - 110355

Published: Nov. 18, 2023

Language: Английский

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