State Of Sergipe Research Articles

Hybrid and native sesame seeds subjected to salinity

Sesame is a plant with great economic and social potential, being used for various purposes such as the food, pharmaceutical, medicinal industries, and more recently, as a source of renewable energy for the production of biofuel. One of the factors that most limit the productivity of this crop is salt stress. Based on this, the present work aimed to evaluate the germination and vigor of hybrid and creoles sesame seeds subjected to saline stress. The experiment was carried out at the Phytotechnics Laboratory of the Engineering and Agricultural Sciences Campus/UFAL. Two sesame cultivars were studied, BRS Anahí and Creole from the state of Sergipe. The seeds were aseptically treated by immersion in 70% alcohol for 1 minute, followed by washing in running water before being subjected to the treatments. To simulate salt stress, sodium chloride (NaCl) was used as a solute at concentrations of 0.0 (control); -0.1; -0.2; -0.3; -0.4 and -0.5 MPa. The material was placed, Biochemical Oxygen Demand (B.O.D.) germination type chamber, regulated at an alternate temperature of 20-30 °C. The experimental design used was completely randomized, with four replications of 25 seeds per treatments in a 2 x 6 factorial scheme (sesame cultivars x saline concentrations). Data were submitted to analysis of variance and polynomial regression, and the analyzes were performed using the SISVAR 5.6 software. The parameters evaluated were: water content, germination, first germination count, germination speed index, seedling length and dry mass. The results for the germination of sesame seeds submitted to salt stress showed that as the salinity levels increased there was a reduction in the percentage of germination of the sesame seeds studied, but until the concentration of -0.4 MPa they are within the standards allowed for commercialization of that culture. In the first count of germination, the Creoles sesame seeds showed the highest values, demonstrating better germination performance compared to BRS Anahí. In the germination speed index, BRS Anahí outperformed Creoles in all salt concentrations, except for the control. For seedling length, it was found that at the lowest salt concentrations both sesame varieties obtained the highest averages, with a significant reduction in length at the highest concentration (-0.5). The dry mass of the seedlings decreased as the water salinity increased, being more evident after the -0.3 MPa NaCl solution, especially for BRS Anahí. Thus, it can be concluded that salinity affects the physiological potential of sesame seeds, being more evident when at salt concentrations from -0.3 MPa. Creoles sesame seeds are less sensitive to saline stress.

Traditional Communities, Development, and the Commons: Movements by Collectors of Wild Fruits in Northeastern Brazil

This article focuses on the experience of Mangaba Collectors in the state of Sergipe in northeastern Brazil to investigate problems faced today by traditional communities living in the commons. The way of life of Mangaba Collectors has been modified because of real estate speculation and the extensive cultivation of crops in their traditional territories of extraction. This community has thus been forced to organize politically and create partnership networks in civil society and the scientific community to address the crisis. However, the opportunity to sell products made from Mangaba in the consumer market created ambiguity within the movement, with some seeking to maintain the logic of the commons and others seeking to expand insertion into the market.

An overview of New Psychoactive Substances (NPS) in northeast Brazil: NMR-based identification and analysis of ecstasy tablets by GC-MS

The actual illicit market for synthetic drugs is characterized by a wide variety of psychoactive substances of different chemical and pharmacological classes, such as amphetamine-type stimulants and new psychoactive substances. The knowledge about its chemical composition, as well as the nature and quantity of the active substances present, is important for emergency care in intoxication cases by these substances and to establish adequate chemical and toxicological analysis procedures in forensic laboratories. The aim of this work was to study the prevalence of amphetamine-type stimulants and new psychoactive substances in the states of Bahia and Sergipe, in the northeast region of Brazil, involving samples of drugs seized by the local police forces from 2014 to 2019. In a total of 121 seized and analyzed samples, in which ecstasy tablets predominated (n = 101), nineteen substances were identified using GC-MS and 1D NMR techniques, comprising classical synthetic drugs and new psychoactive substances (NPS). In order to determine the composition of ecstasy tablets, an analytical method based on GC-MS was applied after validation. Analyzes of 101 ecstasy tablets showed that MDMA was the main substance, being found in 57% of the samples, in amounts between 27.3 and 187.1 mg per tablet. In addition, mixtures of MDMA, MDA, synthetic cathinones and caffeine were observed in 34 samples. These results demonstrate that the variety of substances found and the composition of seized materials in northeast Brazil is similar to other studies carried out previously in other Brazilian regions.

Gastrointestinal parasites in free-ranging common marmosets (Callithrix jacchus Linnaeus, 1758) in the state of Sergipe, northeastern Brazil.

Ecological interactions resulting from human interference and environmental changes have implications for human health and the host animals involved in the parasite cycles. Considering the scarcity of surveys of the parasitic fauna of non-human primates in northeastern Brazil, the objective of this study was to investigate the infection by gastrointestinal parasites in free-ranging common marmosets (Callithrix jacchus) in the State of Sergipe. Fecal samples were collected from 52 animals captured in three protected areas. Most of the samples consisted of adult females and 57% were infected with at least one of the 12 identified parasite taxa. The most frequent intestinal parasite was Prosthenorchis sp., followed by Spiruridae, Entamoeba spp. and Strongylida order. The presence of gastrointestinal parasites was not dependent on sex, age or weight, although there was an association with the capture biome.

Accuracy Study of Kato-Katz and Helmintex Methods for Diagnosis of Schistosomiasis Mansoni in a Moderate Endemicity Area in Sergipe, Northeastern Brazil.

Schistosomiasis is a neglected tropical disease (NTD) caused by blood flukes from the genus Schistosoma. Brazil hosts the main endemic area in the Americas, where Schistosoma mansoni is the only species causing the disease. Kato-Katz (KK) thick smear is the WHO recommended screening test for populational studies, but there is growing evidence for the sensitivity limitations associated with KK, especially in areas with low parasite loads. Helmintex (HTX) is another highly sensitive egg-detection method, based on the magnetic properties of S. mansoni eggs and their isolation in a magnetic field. The objective of this study is to evaluate both KK and HTX in a moderate endemic locality, Areia Branca, located in the municipality of Pacatuba, in the state of Sergipe in northeastern Brazil. From 234 individual fecal samples, two KK thick smears were prepared and evaluated for each sample. Similarly, 30 g of each fecal sample was processed by HTX protocol. Eggs were detected in 80 (34.18%) residents. Twenty-three (9.83%) samples were positive for eggs (only by KK), and 77 (32.91%) samples showed positive for eggs (only by HTX). Sensitivity, specificity, and accuracy estimates gave values of 28.75%, 100% and 75.64%, respectively, for KK, and 96.25%, 100% and 98.72% respectively, for HTX. The positive predictive value was 100% for both methods, while the negative predictive value was 72.99% for KK and 98.09% for HTX. Overall, HTX presented a superior performance compared to the one sample, two slides KK examination. The study confirms the role of HTX as a reference method for the definition of true-positive samples in comparative accuracy studies and its potential role in the late stages when the certification of schistosomiasis transmission interruption is required. Diagnostic tests are important tools for the elimination of this NTD, besides the effective implementation of safe water, basic sanitation, snail control, and the treatment of infected populations.

The vertebrate fossil record from the Feliz Deserto Formation (Lower Cretaceous), Sergipe, NE Brazil: paleoecological, taphonomic, and paleobiogeographic implications

The Feliz Deserto Formation (Berriasian–Valanginian, Sergipe–Alagoas Basin, NE Brazil) preserved some of the earliest South American fossil records of the rifting stages which resulted in the Gondwana supercontinent break-up during the Early Cretaceous. Recently, the first spinosaurid theropod record of this formation was described, based on a tooth recovered from Canafístula 01 locality in Sergipe State. We add herein twenty-seven isolated specimens to the fossil record of the Lower Cretaceous Feliz Deserto Formation. The new material includes seven isolated spinosaurid theropod teeth of the spinosaurine clade, as well as an indeterminate theropod preungual pedal phalanx. In addition, we describe an isolated crocodyliform osteoderm, as well as eighteen isolated teeth, some of which were taxonomically identified in three distinct morphotypes of neosuchian crocodyliforms. These findings expand the Gondwanan fossil record of both spinosaurine theropods and neosuchian crocodyliforms. Despite the fragmented nature of the specimens, these new fossils allowed the characterization of their general taphonomic features with low fluvial transport of bioclast prior to the burial. The depositional paleoenvironment of the Canafístula 01 locality is compatible with the deltaic system unit, that characterizes part of the Feliz Deserto Formation during the Early Cretaceous. These fossil findings exemplify the co-occurrence of spinosaurid dinosaurs and more than one taxon of crocodyliforms in the deltaic-lacustrine paleoenvironment represented by the Feliz Deserto Formation. These new occurrences reinforce the fossiliferous potential of the Canafístula 01 locality, especially related to the paleovertebrates from the Lower Cretaceous of Brazil.

Time series of cases and treatment outcomes from tuberculosis in Sergipe, 2012-2021.

The objectives of this study were: (1) to analyze the temporal trend of tuberculosis treatment outcomes in the state of Sergipe; (2) to identify the existence of seasonality of tuberculosis; (3) to verify the influence of the rapid molecular test (MTB-RIF) in the time series of tuberculosis and its treatment outcomes in the state of Sergipe; and (4) to verify treatment outcomes. Ecological study on tuberculosis and three treatment outcomes (cure, interruption of treatment, and death) extracted from Datasus. Incidence and mortality rates were calculated for the crude occurrences of cases and deaths and the proportions of cure and interruption of treatment (%). The time series was analyzed using Prais-Winsten regression from Jan to Dec/2021. The total incidence rate was 36.35 cases per 100,000 inhabitants, with an increase of 0.44% per month (95%CI 0.35; 0.54). The cure rate was 64.0% with a steady trend (p>0.05). The percentage of treatment interruption was 13.3%, with a reduction of -0.73%/month (95%CI -1.11; -0.34). The total mortality rate was 1.92 deaths/100,000 inhabitants with a stationary trend. After the implementation of the MTB-RIF, there was an increase in the incidence rate of 0.65% per month. Seasonality was not identified in any of the analyses performed (p>0.05). There was an increase in incidence rates, reduction in treatment interruption and mortality in the state of Sergipe. Seasonality was not identified. The rapid molecular test showed a growth effect on the incidence rate.

Spatial analysis of the risk for canine visceral leishmaniasis in an urban area in the State of Sergipe.

Visceral Leishmaniasis is included among the neglected tropical diseases, being directly related to conditions of social vulnerability, in urban environments, dogs act as important reservoirs. The aim of the study was to evaluate the distribution of dogs, related risk factors and identify of volatile organic compounds from infected dogs. Peripheral blood samples from 72 dogs were collected for detection using the ELISA test, in addition to hair samples for analysis by GC-MS. Of the evaluated dogs, 13 (18.05%/72) were reactive for canine VL, seven in Aracaju and six in Propriá. Factors related to vegetation, age, place where the dog stays and free access to the street, were associated with a greater chance of the dog becoming infected. Fifty-three compounds were identified from ten canine hair samples, among which 2-butoxyethanol, benzaldehyde, decane, 2-phenylacetaldehyde, nonan-1-ol, 2-phenoxyethanol, nonanoic acid, 8-heptadecene and eicosane were found in seropositive dogs for leishmaniasis. The guardian's posture has been increasingly important, requiring more attention to the dog's health and actions aimed at environmental management in an attempt to reduce cases of canine VL in the state. Even though the identified VOCs have not been associated with leishmanial infection, it is of great use for understanding canine hair substances.

GANHOS COMPETITIVOS ADVINDOS DE RELACIONAMENTOS INTERORGANIZACIONAIS: O MERCADO DA BELEZA EM EVIDÊNCIA

The on-screen study aims to identify competitive gains in interorganizational relationships between entrepreneurs associated with SINDICAB - Union of Hairdressers and Autonomous Similar in the State of Sergipe. The methodology used has a qualitative exploratory and descriptive nature, constituting a case study. Data were collected from entrepreneurs linked to the union through semi-structured interviews and documents available for research. The occurrence of competitive gains indicated in the network theory described by Balestrin and Verschoore (2008) was analyzed. As conclusive results, it can be stated that the individual and collective benefits obtained in the interorganizational relations in the union sphere are based above all on the developed social relations. Competitive gains could be evidenced in a significant portion of the relationships between entrepreneurs in their joint actions provided by union membership.

The crucial role of the partner in the incidence of cases of congenital syphilis in the state of Sergipe: an analysis in 17 years

Introduction: Congenital syphilis is a highly preventable infectious disease. The relevance of the partner in the transmission of the disease is undeniable, and the underestimation of its treatment is a great risk with serious fetal consequences. Objective: The aim of this study was to analyze the partner’s contribution to the inadequate treatment of pregnant women and the incidence of cases of congenital syphilis in Sergipe between 2005 and 2022. Methods:A cross-sectional, retrospective, and descriptive study was carried out through the collection of reported cases of congenital syphilis from the Notifiable Diseases Information System (SINAN). Results: There was a considerable increase in the number of reported cases of congenital syphilis in Sergipe in the past 17 years, with a predominance of untreated partners (61.5%) over treated ones (14.9%), excluding the 23.6% who had this information ignored. The variations presented from 2018 onwards stand out, resulting from the softening implemented in the notification of partner data, with an average of 23.7% of ignored information. Consequently, the diagnosis of recent congenital syphilis was found in 83.7% of newborns whose parents were not treated, in addition to 50% of cases of late infection and the vast majority of cases of stillbirths/abortion (92.6%) and deaths from the disease (78.8%). Furthermore, the non-inclusion of the partner in prenatal care (83%) contributed mainly to delays in the diagnosis of maternal syphilis, with 90.1% during delivery/curettage, 76.7% after delivery, and 77.2% of them not even identified with the disease. Conclusion: In addition to the increase in cases of congenital syphilis, there was a predominance of untreated partners, coinciding with changes in the notification criteria in 2018, which contributed to most cases of delay in maternal diagnosis, reinfection, and vertical transmission. Thus, the partner’s approach is essential to guarantee the treatment and interruption of the transmission of the disease.

Segurança de barragens em Sergipe: simulação do rompimento hipotético em cascata das barragens Jacarecica I e Jacarecica II

ABSTRACT Despite of benefits such as water security and energy supply dams provide, there are environmental impacts and risks of accidents associated with their usage, i.e. rupture. In these cases, a structured Emergency Action Plan (EAP) must be executed to mitigate impacts and loss of life. To do so, hypothetical dam break scenarios must be simulated to obtain the flood’s spatial coverage in downstream valley. In this regard, this work aimed to obtain the flood maps due to hypothetical ruptures of Jacarecica I and Jacarecica II dams (state of Sergipe), structures that don’t have Safety Plans elaborated. HEC-RAS 2D model was used to elaborate flood inundation maps and assess hydrodynamic results, that showed the breach wave impacts residential, industrial and agricultural areas before reaching the city of Riachuelo, with high depths and velocities, and minimum arrival times of 6 hours. With rural and urban areas at risk, it is mandatory, according to the PNSB, that the dams’ EAPs are prepared.

Two new species of Vitalius (Araneae: Theraphosidae) from the restingas of the states of Rio de Janeiro, Bahia and Sergipe, Brazil

Two new species of Vitalius (Araneae: Theraphosidae) from the restingas of the states of Rio de Janeiro, Bahia and Sergipe, Brazil

Evaluation of the schistosomiasis control program (PCE) in an endemic area, northeastern Brazil: a population-based and 10-year time series study

Schistosomiasis is an endemic disease in Brazil and the State with the highest positive rate in the country is Sergipe. Herein, we assessed data from the Brazilian Schistosomiasis Control Program (PCE) in the State of Sergipe between the period 2008 and 2017. We evaluated data about schistosomiasis and snails of the genus Biomphalaria. We used the log-linear regression model (joinpoint) to assess temporal trends and the Kernel estimator for spatial statistics analysis. According to the PCE, Sergipe has 51 endemic municipalities for schistosomiasis. Nevertheless, information about the disease and that collected by the PCE has not been recorded regularly in all endemic municipalities. Additionally, only nine municipalities (17.6%) carried out the malacological survey. The average of positive rate from schistosomiasis in Sergipe was 8.4%. However, our data suggest that it may be underestimated. The spatial analysis maps (Kernel maps) showed areas of high transmission of the disease in municipalities close to the São Francisco River and in the metropolitan region of the State. Altogether, our findings suggest that schistosomiasis has been underreported and it is still a serious public health concern in Sergipe. In addition, there are significant failures in the conduction of PCE’s activities by the municipalities.
 KEY WORDS: Schistosomiasis; Epidemiological monitoring; Spatial analysis; Brazil.

Geochemistry of trace metals in surface sediments from the continental slope of the states of Sergipe and Alagoas, Northeastern Brazil

Geochemical analyses were used to determine the origin and identify the main factors that lead to the metal trace distribution on the surface sediments from the continental slope of Sergipe in Brazil. Sediment samples were collected during the dry and rainy periods, from 36 sampling points distributed at water depths from 400 to 3000 m. In general, no effect of seasonality was observed on the metal concentrations and no significant differences were observed between the depth ranges. The correlation analysis indicated the continental origin as the most predominant, followed by authigenic deposition. Anthropogenic enrichment was not noted, nor was the possibility of adverse aquatic biota effects. The results made it possible to understand the contribution of rivers in the transport and transfer of particulate matter to the coastal region, in addition to providing new information on the content of trace metals in tropical Atlantic sediments.

Phlebotominae Fauna (Diptera: Psychodidae) and the Spatial Distribution of Species in Sergipe, Brazil.

Some sand fly species are the vectors responsible for the transmission of Leishmania spp. (Kinetoplastida: Trypanosomatidae), the etiological agent of leishmaniasis, and in the state of Sergipe, the two main forms of the disease (visceral and cutaneous) are recorded. Few works show information about the species that form the Phlebotominae fauna in Sergipe. This study aimed to update and determine how they are distributed throughout the state. The study used data from surveys about phlebotomines in Sergipe, from the Program of Surveillance and Control of Visceral Leishmaniasis, carried out by the Central Public Health Laboratory of Sergipe, from 2008 to 2018, along with review and original data from 2022. The commentary on this information was developed with focus on the species that can be vectors for the disease. Sergipe has, up to now, 27 registered species of phlebotomines from 12 genera, 15 of them are of sanitary relevance. Twenty two of these species are in the mesoregion East, 19 in the Agreste, and 11 in the Sertão of Sergipe. The species with the greatest distribution was Evandromyia lenti (Mangabeira, 1938), present in 74.6% of the municipalities of Sergipe, followed by Lutzomyia longipalpis (Lutz & Neiva, 1912), the main vector of the etiological agent of visceral leishmaniasis in Brazil, present in 68% of the municipalities studied. This study expands the number and distribution of species recorded in the state. This information can contribute to disease containment plans and support health education actions aimed at the control of leishmaniasis in Sergipe.

Soroprevalência de anticorpos contra Brucella lisa em pequenos ruminantes dos estados de Sergipe, Bahia, Ceará e Paraíba

ABSTRACT Brucellosis is a zoonotic disease widespread almost all over the world, representing a significant economic and public health problem. Brucella melitensis, B. suis and B. abortus are considered the most pathogenic species for humans. The most virulent species, B. melitensis is endemic in many parts of the world, particularly the biovar 3 in the Mediterranean and Eastern Europe. Some Latin American countries are seriously affected by biovar 1, especially Mexico, Peru and northern Argentina. Furthermore, while Brazil is considered free of this etiologic agent, one recurrent question is whether this infection really does not occur in Brazil or there is a lack of research/data on the subject. To answer this question, this study aims to investigate the occurrence of antibodies against smooth Brucella in goats and sheep in the states of Sergipe, Paraíba, Ceará and Paraíba. All samples were screened by the Rose Bengal test (RBT). The complement fixation (CFT) and the fluorescence polarization (FPT) tests were used as confirmatory tests. There were no positive samples in the confirmatory tests (both CFT and FPT). We, therefore, conclude that this result reinforces the previous knowledge regarding the exotic status of B. melitensis infection in Brazil.

Geographic location and seasonality affect the chemical composition of essential oils of Lippia alba accessions

The chemical composition of essential oils (EO) is determined by genetic factors; however, these factors strongly interact with the environment, leading to significant changes in their constitution. The aim of this study was to evaluate the effect of geographic location on the chemical composition of the EO of seven accessions of Lippia alba (LA-03, LA-13, LA-24, LA-32, LA-36, LA-57, and LA-59) harvested monthly. Trails were conducted simultaneously in São Cristóvão, State of Sergipe, and Uberlândia, State of Minas Gerais, Brazil, from August 2017 to July 2018. The EO obtained by microwave-assisted distillation were analyzed by GC/MS-FID. In cluster analysis, it was observed that for all months, two groups were formed in each location. In Uberlândia, Group 1, with greater abundance of geranial + neral + linalool, included LA-03, LA-24, LA-32, LA-36, and LA-59; and Group 2, with greater abundance of carvone, included LA-13 and LA-57. The same response was observed in São Cristóvão, except for accession LA-24 in August, October, January, February, June, and July, which migrated from Group 1 to Group 2, joining LA-13 and LA-57. There were significant differences in the concentrations of the principal compounds between the locations. Greater concentrations of neral, 1,8-cineole, and ρ-cymene were obtained in accessions LA-03 (38.40%), LA-57 (11.50%), and LA-32 (7.97%), respectively, harvested in Uberlândia. Greater concentrations of carvone (75.66%), linalool (68.19%), geranial (55.90%), limonene (12.18%), piperitone (9.68%), and caryophyllene oxide (6.69%) were obtained in accessions LA-57, LA-24, LA-59, LA-57, LA-13, and LA-59, respectively, harvested in São Cristóvão. There were significant differences in the concentrations of the main compounds, showing that the chemical profiles of the essential oils of L. alba accessions are affected in a quantitative and qualitative way, both between harvests of monthly leaf regrowth in the same geographic region, and in harvests performed in different regions. These data reinforce the need for standardization of essential oil production in native perennial plants, for greater stability of the compounds.

Two new species of Cryptanthus (Bromelioideae, Bromeliaceae) from the Atlantic Forest of northeastern Brazil

Two new species of Cryptanthus from the Atlantic Forest of northeastern Brazil are described and illustrated. Cryptanthus pirambuensis occurs in Sergipe State and is compared to C. alagoanus, C. pickelii and C. ruthiae, from which it differs mainly by the number of flowers in the apical cluster of the inflorescence and the number of flowers in the lateral clusters of the inflorescence. Cryptanthus vinosibracteatus was discovered in Bahia State and is morphologically similar to C. arelli, but it can be differentiated by the absence of trichomes on the adaxial surface of the leaf blades, length and color of the floral bracts and sepals, and length and connation of the petals. Geographic distribution data, including a map, photographs and comments are also provided for the new species.

Ectoparasitic flies of bats (Mammalia: Chiroptera) in urban green areas of northeastern Brazil.

In urban and degraded areas, ectoparasite abundance can be affected by increasing human population density and habitat fragmentation. This study aimed to characterize the ectoparasitic fly community associated with bats in the urban green areas of Sergipe, Brazil. Campaigns were conducted monthly, for two consecutive nights, between September 2019 and February 2021. To capture the bats, ten mist nets were set up inside and at the edge of the habitat fragments. All ectoparasites found were removed from the bats and stored in 70% alcohol. The specificity index, parasitological rates, and level of parasite aggregation were calculated, and the influence of host sex and seasonality on parasitological rates were verified for the most parasitized bats. The collected ectoparasites corresponded to the families Nycteribiidae (S = 1; n = 26) and Streblidae (S = 13; n = 849), with Trichobius costalimai and Medistopoda aranea being the most abundant species. For some interactions, there was an influence of host sex on the prevalence rates, with the highest number of parasites being found on females, which can be explained by their greater susceptibility to parasitism owing to their long stay in roosts. The seasonality influenced the parasitological rates, and opposing patterns (from what was expected) were observed for some interactions; this influence may be due to the biological differences between parasite species. This study provides relevant data on this interaction, especially for urban areas in northeastern Brazil, expanding the number of studies in the State of Sergipe and promoting future studies.

Bee richness and abundance in small fruit farms from semiarid landscape, NE, Brazil

Bee diversity and current status of native populations is barely known in cropland from semiarid Sergipe, where fruit production is a growing activity among small farmers. Psidium guajava L. (Myrtaceae) is spread among small growers in Canindé de São Francisco and Poço Redondo in Sergipe state, Northeastern Brazil, in semiarid Caatinga, causing landscape change and habitat loss. Available evidences support that cross-pollination provided by bees may increase seed set and fruit production, despite self-pollination. We aimed to access bee richness and abundance within Guava orchard and identify landscape parameters important to these patterns. Survey was conducted in ten Guava orchards during the flowering period (n=10) from May to December 2017. Nine bee species were recorded and the high density and generalist bees Trigona spinipes and Apis mellifera comprised 92% of the flower visitors. No other social native bees were found, and solitary bees were scarce. No significant influence of landscape structure was found for bee richness, while bee abundance was affected by environmental diversity, isolation, and distance to caatinga patches and continuous vegetation reserves. Landscape simplification threatened bee diversity and pollination services. These results highlight the importance of providing bee habitat within farmlands, rearing stingless bees and restoring natural habitats along streams to increase wild bee populations within crops.