Agricultural landscapes sometimes include natural habitats which can support the ecosystem by enhancing the pollination of crops, thus boosting the productivity. This research was conducted between May and July 2017, in the municipality of Tangará da Serra, Mato Grosso, Brazil, to assess the Cerrado from the perspective of it being a crucial habitat to sustain the sunflower-pollinating bees (Helianthus annuus L.). The bees were sampled using entomological nets and pan traps, in specifically marked out plots (20 m x 150 m), in the Cerrado, and in a sunflower crop, at different distances from the Cerrado border. The assessment was done in terms of the composion and species richness, abundance of individuals and the mass (g) of the sunflower chapters exposed and isolated from the floral visitors. While species richness showed no differences between the Cerrado and sunflower crop, a difference was observed for abundance, with more numbers of individuals in the sunflower crop, most likely because of the food source supply. In the sunflower crop, the bee diversity decreased proportionally as the distance from the border increased. The seed mass of the sunfl ower chapters was significantly higher in the flowers open to visitors than in those of the isolated chapters open for visitation. From the results, it was evident that the bees presente in the Cerrado visit the sunflower crop to gather pollen and nectar, and thus assist in cross-pollinating them and raising the productivity.

O Brasil, é o maior produtor e, também, o maior consumidor mundial de maracujá. Com esta demanda e oferta da fruta a agricultura familiar tem na cadeia produtiva do maracujá-azedo um grande potencial para gerar renda e segurança social.  A cultura do maracujá no Brasil é favorecida pelo clima tropical e subtropical com luminosidade, volumes hídricos ideais, condições climáticas e variedades mais resistentes. Estas condições proporcionam maior longevidade às plantas, que produzem em média três safras ao ano por até três anos consecutivos. O cultivo desta fruta representa uma alternativa viável de atividade para agricultura familiar, por gerar receita mais rápida devido aos períodos maiores de safra, com comercialização e capitalização a curto prazo.  Porém, o processo comercial é um desafio para este segmento, já que o agricultor precisa ter habilidades e tempo para desenvolver atividades que vão além do trato da cultura. Eles precisam realizar trabalhos que abrangem administração de custos, captação de recursos, viabilização de insumos, embalagem, armazenamento do produto e o escoamento junto ao comércio, representado por intermediários, mercados varejistas, clientes finais, associações e cooperativas. Diante do exposto, investigamos a produção e comercialização do maracujá-azedo no município de Tangará da Serra/MT, envolvendo 20 produtores locais e 38 comércios varejistas. Abordamos a relação do produtor com seu plantio tendo a polinização como fator produtivo da frutífera, observando as principais fragilidades e oportunidades, considerando que esta cultura já ocupou importante espaço junto à agricultura familiar local.

Ants  and  dung  beetles  are  widely  used  in  monitoring  biodiversity  and  are  considered  excellent  environmental  indicators.  Although  the pitfall trap is the most commonly used method to sample dung beetles and ants in ecological studies, beetles are usually sampled using dung‐baited pitfall traps while ants are sampled using un‐baited pitfalls. In the protocol for collecting the beetles it is necessary to have attractive baits in pitfalls. In order to minimize collection effort and costs and to facilitate logistics, it is necessary to determine if there is an effect of the baits on the biodiversity of ants collected in the same traps. Therefore, the objective of this work was to find out whether baited pitfalls could replace conventional pitfalls for the capture of ants. In a total of 42 areas of native habitat, three baited pitfall traps and three without bait were installed, all in the same transect, equidistant ten meters and in activity for 48 hours. In total, 150 species were collected, of which 131 were recorded in non‐baited pitfalls and 107 in baited pitfalls. Traps without bait contributed to 28% of the total number of species captured in this study, whereas pitfalls with bait contributed only to 12% of the total species caught. However, 60% of the total species were captured regardless of the method. In addition to the loss of species among the types of traps, the effect of the method modifies the species composition. We concluded that depending on the type of study, a small decrease in the number of species and change in the composition can influence the results. Thus, we recommend that baited pitfalls should not replace conventional pitfalls.Palavras-chave: Método de coleta; Protocolo de coleta; Desenho da amostra; Esforço de amostragem.