Distribuição espacial dos ninhos de Athene cunicularia (coruja-buraqueira) e dinâmica de sua utilização

A coruja-buraqueira (Athene cunicularia) nidififica no chão e, com frequência, ocorre em ambientes bastante urbanizados como no campus universitário da UNESP em Botucatu, SP região centro-oeste paulista. Os objetivos do estudo foram descrever as características físicas das escavações, distribuição espacial, formas de utilização e avaliar que elementos presentes nas áreas urbanas são importantes para a seleção dos sítios de nidificação. Foram monitorados 6 grupos familiares desde 2011, cuja população e o número de ninhos foram contabilizados e a localização, georeferenciados. Os dados comportamentais foram registrados em caderno de campo, fotografados e filmados. A densidade populacional no câmpus foi de 0,03 indivíduos por Km² com os sítios de nidificação vizinhos tendo a distância mínima de 140,0 metros e máxima de 378 metros. As tocas apresentaram 50,6± 5,6cm de diâmetro, a maioria construída em terreno com declive. As corujas selecionaram sítios de nidificação em áreas abertas e gramadas contendo no entorno poleiros naturais (árvores, arvoretas, arbustos) e artificiais (placas, postes, peitoral de janelas, etc) e próximos a bueiros e postes com iluminação artificial. Estes dois últimos constituíram atrativos paras as suas presas (artrópodes e roedores) e a análise de ergagrópilas revelou a ocorrência de 5 grupos taxonômicos de artrópodes: 65,4% de Coleóptera, 27,2% de Orthoptera, 4,6% de Blatodea, 1,4% de Aranae, 0,9% de Hymenoptra e 0,4% de Mantodea. Os resultados obtidos mostraram que as corujas-buraqueiras levaram em consideração características como oferta abundante de alimento, principalmente, de artrópodes que se concentravam nas área iluminadas e nos bueiros. A estabilidade temporal dos sítios de nidificação nestes três anos de monitoramento acompanhada de sucesso reprodutivo de 50% revela que a despeito do intenso tráfego de veículos e transeuntes no campus, o ambiente ..

Economic costs of invasive non-native species in urban areas: an underexplored financial drain

Urbanization is an important driver of global change associated with a set of environmental modifications that affect the introduction and distribution of invasive non-native species (species with populations transported by humans beyond their natural biogeographic range that established and are spreading in their introduced range; hereafter, invasive species). These species are recognized as a cause of large ecological and economic losses. Nevertheless, the economic impacts of these species in urban areas are still poorly understood. Here we present a synthesis of the reported economic costs of invasive species in urban areas using the global InvaCost database, and demonstrate that costs are likely underestimated. Sixty-one invasive species have been reported to cause a cumulative cost of US$326.7 billion in urban areas between 1965 and 2021 globally (average annual cost of US$ 5.7 billion). Class Insecta was responsible for >99 % of reported costs (US$324.4 billion), followed by Aves (US$ 1.4 billion), and Magnoliopsida (US$ 494 million). The reported costs were highly uneven with the sum of the five costliest species representing 80 % of reported costs. Most reported costs were a result of damage (77.3 %), principally impacting public and social welfare (77.9 %) and authorities-stakeholders (20.7 %), and were almost entirely in terrestrial environments (99.9 %). We found costs reported for 24 countries. Yet, there are 73 additional countries with no reported costs, but with occurrences of invasive species that have reported costs in other countries. Although covering a relatively small area of the Earth’s surface, urban areas represent about 15 % of the total reported costs attributed to invasive species. These results highlight the conservative nature of the estimates and impacts, revealing important biases present in the evaluation and publication of reported data on costs. We emphasize the urgent need for more focused assessments of invasive species’ economic impacts in urban areas.info:eu-repo/semantics/publishedVersio

Economic costs of invasive non-native species in urban areas: An underexplored financial drain

Urbanization is an important driver of global change associated with a set of environmental modifications that affect the introduction and distribution of invasive non-native species (species with populations transported by humans beyond their natural biogeographic range that established and are spreading in their introduced range; hereafter, invasive species). These species are recognized as a cause of large ecological and economic losses. Nevertheless, the economic impacts of these species in urban areas are still poorly understood. Here we present a synthesis of the reported economic costs of invasive species in urban areas using the global InvaCost database, and demonstrate that costs are likely underestimated. Sixty-one invasive species have been reported to cause a cumulative cost of US$326.7 billion in urban areas between 1965 and 2021 globally (average annual cost of US$ 5.7 billion). Class Insecta was responsible for >99 % of reported costs (US$324.4 billion), followed by Aves (US$ 1.4 billion), and Magnoliopsida (US$ 494 million). The reported costs were highly uneven with the sum of the five costliest species representing 80 % of reported costs. Most reported costs were a result of damage (77.3 %), principally impacting public and social welfare (77.9 %) and authorities-stakeholders (20.7 %), and were almost entirely in terrestrial environments (99.9 %). We found costs reported for 24 countries. Yet, there are 73 additional countries with no reported costs, but with occurrences of invasive species that have reported costs in other countries. Although covering a relatively small area of the Earth's surface, urban areas represent about 15 % of the total reported costs attributed to invasive species. These results highlight the conservative nature of the estimates and impacts, revealing important biases present in the evaluation and publication of reported data on costs. We emphasize the urgent need for more focused assessments of invasive species' economic impacts in urban areas

Economic costs of invasive non-native species in urban areas: An underexplored financial drain

International audienceUrbanization is an important driver of global change associated with a set of environmental modifications that affect the introduction and distribution of invasive non-native species (species with populations transported by humans beyond their natural biogeographic range that established and are spreading in their introduced range; hereafter, invasive species). These species are recognized as a cause of large ecological and economic losses. Nevertheless, the economic impacts of these species in urban areas are still poorly understood. Here we present a synthesis of the reported economic costs of invasive species in urban areas using the global InvaCost database, and demonstrate that costs are likely underestimated. Sixty-one invasive species have been reported to cause a cumulative cost of USD 326.7 billion in urban areas between 1965 and 2021 globally (average annual cost of US 5.7 billion). Class Insecta was responsible for >99 % of reported costs (USD 324.4 billion), followed by Aves (USD 1.4 billion), and Magnoliopsida (US 494 million). The reported costs were highly uneven with the sum of the five costliest species representing 80 %. Most reported costs were a result of damage (77.3 %), principally impacting public and social welfare (77.9 %) and authorities-stakeholders (20.7 %), and were almost entirely recorded in terrestrial environments (99.9 %). We found costs reported to 24 countries, yet there were 73 countries with records of species that cause urban costs elsewhere but with no urban costs reported themselves. Although covering a relatively small area of the earth surface, urban areas represent about 15 % of the total reported costs attributed to invasive species. These results highlight the conservative nature of the estimates and impacts, revealing important biases present in the evaluation and publication of reported data on costs. Thus, we emphasize the urgent need for more focused assessments of invasive species economic impacts in urban areas