Gudryan J. Baronio

• Ecologist | PhD in Ecology and Conservation of Natural Resources
• PostDoc Position at University of São Paulo

Background Floral adaptations supposedly favour pollen grains to cross the numerous barriers faced during their journey to stigmas. Stamen dimorphism and specialized petals, like the cucculus in the Cassieae tribe (Fabaceae), are commonly observed in flowers that offer only pollen as a resource for bee pollinators. Here, we experimentally investiga...

Fire is a major ecological and evolutionary factor promoting biodiversity and maintaining functioning of naturally fire-prone ecosystems. In tropical savannas, plant communities show a set of fire-adapted traits and both flowering and pollination services have the potential to rapidly regenerate after fire, but fire-suppression policies may disrupt...

Here, were observed the interaction between Centrosema brasilianum (Fabaceae, Papilionoideae) and their floral visitors and quantified pollen removal and visitor traits. Aims: for to determine whether the behavior, quantity, and location of deposited pollen on the body of visiting bees differs according to the body size of bees. Methods: the morpho...

The reproductive success of organisms depends on the positive and negative interactions it establishes throughout its lifetime. Pollinators and mutualists increase adaptive value, while herbivory and antagonism impair plant performance. Asteraceae flowers, simultaneously interacting with pollinators, herbivores and parasitoids with the same structu...

Fire is a natural disturbance in the Cerrado (Brazilian savanna) but its effects on the landscape are capable of altering its pattern of severity and frequency. Because of that, some areas of the Biome can be in dangerous in the National Park of Sempre Vivas, in Minas Gerais State. Within this context, we spatially analyzed fires in areas of Cerrad...

Mensagem Doce 175: 56-67; ISSN 1981-6243; APACAME - Associação Paulista de Apicultores, Criadores de Abelhas Melíficas Europeias. O Brasil possui uma alta riqueza de abelhas nativas sem ferrão (ANSF), com espécies com distribuição ampla e outras com distribuição mais restrita. Algumas dessas espécies estão listadas como ameaçadas de extinção e as c...

Animal pollination is important for more than 75% of agricultural crops, including coffee, whose productivity can increase with adequate pollination. Bees, including many solitary species, are diverse pollinators, with around 85% of them considered more effective than honeybees in pollen transfer. We assessed the coffee plantation and its surroundi...

Encounters between flowers and invertebrates are key events for the functioning of tropical forests. Assessing the structure of networks composed of the interactions between those partners leads to a better understanding of ecosystem functioning and the effects of environmental factors on ecological processes. Gathering such data is, however, costl...

During the main COVID-19 global pandemic lockdown period of 2020 an impromptu set of pollination ecologists came together via social media and personal contacts to carry out standardised surveys of the flower visits and plants in gardens. The surveys involved 67 rural, suburban and urban gardens, of various sizes, ranging from 61.18° North in Norwa...

Floral traits mediate the roles of distinct animals as effective pollinators along a generalization/specialization continuum. Many plant species are visited by different pollinator functional groups and the specific contribution of each group is expected to reflect the set of floral characteristics defined by pollination syndromes. Although conside...

Dioecy, a character common to all cycads, requires obligatory outcrossing. The absence of potential reproductive mates of the opposite sex renders individuals effectively sterile. Therefore, reproductive synchrony is essential for the reproductive success of cycads. Here, we describe the reproductive phenology, morphology, and lifespan of strobili...

• Pollination is provided by biodiversity and maintains global food production. We investigated the effects of vegetation cover on the abundance of floral visitor and vine (Vitis labrusca Raf.) production. We expected an increase in both floral visitor frequencies and vineyard yields with an increase in native vegetation cover in the landscape. We...

Fire acts as an ecological filter determining species diversity and composition of communities. In tropical sa-vannas in Central Brazil, natural fire happens through lightning, but anthropogenic fire is also common, either controlled fire prescribed for management of vegetation and to promote grass growth or accidental and intentional fires related...

Populations of dioecious plants commonly exhibit dissimilarities to the equilibrium expectation of a 1:1 sex ratio. Differential expenditure for reproduction between genders is cited as the primary mechanism responsible for a male-biased sex ratio, with increased effects on long-living species, but these mechanisms are still poorly understood. We e...

Patterns in ecology are the products of current factors interacting with history. Nevertheless, few studies have attempted to disentangle the contribution of historical and current factors, such as climate change and pollinator identity and behavior, on plant reproduction. Here, we attempted to separate the relative importance of current and histor...

BACKGROUND Natural environments within agricultural landscapes have been recognized as reservoirs of biodiversity and, therefore, providers of fundamental ecosystem services to human beings. Bees are the main providers of pollination and thus contribute to the production of food consumed worldwide. In this work, we evaluated the distribution of bee...

In plant–pollination interactions, the antagonists collect the same set of resources offered to legitimate visitors, but their morphologies and behavioural approaches possibly make their effect on plant fitness negative rather than positive. Depending on the morphology of Malpighiaceae flowers, these small-bodied bees can adopt an upside-down posit...

• Seasonal changes in environments may not only affect habitat connectivity but may also affect its use by species and their interactions. Thus, during the flood season, ants are forced to develop survival strategies such as vertical plant migration. • According to this, it has been hypothesized that the presence of ants may directly affect plant‐p...

• Although the production of extranuptial nectar is a common strategy of indirect defense against herbivores among tropical plants, the presence of extranuptial nectaries in reproductive structures is rare, especially in ant‐plants. This is because the presence of ants in reproductive organs can generate conflicts between the partners, as ants can...

The galling insect manipulates the host plant tissue to its own benefit, building the gall structure where it spends during most of its life cycle. These specialist herbivore insects can induce and manipulate plant structure and metabolism throughout gall development and may affect plant volatile emission. Consequently, volatile emission from alter...

HOW DO BEES PERCEIVE FLOWERS AND WHY IT IS IMPORTANT? Animal cognition can be defined as the ability of an organism to acquire, retain and subsequently use the sensory information during decision-making processes in different contexts. The understanding of how the signals emitted in the environment interact with the sensory system of animals capab...

Floral resources are strongly related to the establishment and maintenance of plant-pollinator interactions. Interacting species have different degrees of dependence, which are defined mainly by the strategies of plants to make available the floral resources and those presented by visitors in collecting these resources. However, morphological and b...

Galls are specific interactions between specialist herbivores and their host plants. They are considered neoformed plant organs developed from cellular hypertrophy, tissue hyperplasia and cellular redifferentiation of the host tissues. Among several organisms capable of inducing galls, insects induce them with high morphological complexity. The ind...

Floral rewards do not only attract pollinators, but also herbivores and their predators. Ants are attracted by extrafloral nectaries (EFNs), situated near flowers, and may interfere with the efficiency and behaviour of pollinators. We tested the hypothesis that the impacts of ant–pollinator interactions in plant–pollinator systems are dependent on...

Formigas são conhecidas por se estruturarem através de mecanismos comportamentais e competitivos. Poucos estudos investigam a coexistência entre as espécies e especialmente como esses animais se distribuem no tempo em fitofisionomias de um mesmo bioma. O Cerrado se caracteriza por ter condições ambientais que refletem em variação de condições micro...

Spatial and temporal limited resource and niche overlap studies have been widely used to explain resource­sharing in community ecology. Furthermore, morphological and behavioral differences among species are relevant to predict how they may share niche availabilities. We evaluated temporal niche overlap and the ability of visitors to collect floral...

A particular research area can be significantly improved when information is systematized in explanatory theories able to generate testable hypotheses. In pollination biology, such systematization contributed to several ecological theories and expanded the understanding of the patterns and processes that originated, maintain, or exclude ecological...

A particular research area can be significantly improved when information is systematized in explanatory theories able to generate testable hypotheses. In pollination biology, such systematization contributed to several ecological theories and expanded the understanding of the patterns and processes that originated, maintain, or exclude ecological...

Extrafloral nectary drinking ants are known as effective plant guards, but some herbivores may circumvent ant attacks by foraging on different plant parts or presenting adaptations to avoid ant predation. Here we experimentally investi-gated the effect of Camponotus blandus on the florivory of the extrafloral nectaried shrub Banisteriopsis malifoli...

In the Brazilian savanna many plant species bear regular associations with patrolling ants that are aggressive towards insect herbivores. However, not only ants but also several species of predatory wasps are attracted to plants due to the extrafloral nectaries (EFNs). Such wasps feed on both herbivores and plant exudates. In this study we describe...

In the Brazilian savanna, myrmecophilous lycaenids are often found in many shrubs feeding on plant reproductive structures while are tended by ants, but only recently the role of both ants and food on the occurrence of lycaenids have received attention. In this study, we investigated the influence of Camponotus blandus (Formicinae) and flower bud a...

In the Brazilian savanna many plant species bear regular associations with patrolling ants that are aggres-sive towards insect herbivores. However, not only ants but also several species of predatory wasps are attracted to plants due to the extrafloral nectaries (EFNs). Such wasps feed on both herbivores and plant exudates. In this study we describ...

Resumo Embora todas as partes da planta ofereçam algum tipo de resistência contra herbívoros, tais como tricomas e nectários extraflorais, os herbívoros são atraídos às folhas jovens, pois possuem menor quantidade de compostos secundários e estruturas de sustentação. Assim, essas folhas se tornam mais palatáveis e nutricionalmente superiores devido...

Pre-dispersal seed predation by specialist insects can affect the performance of plants, and the morphological, morphometrical and physiological traits of fruits/seeds influence the degree of predation. Senna occidentalis is a weed found in degraded pastures and plantations, which is poisonous to cattle and other domestic animals. This study tested...

The presence of aggregates o IA. reticulatum on Bauhinia has been reported, but the insects were mainly attended by ants of the genus Camponotus, and stingless bees were not regularly recorded in aggregations. We observed a colony °f thetreehopperv reticulatum and stingless bees, Trigona branneri, interaction Bauhinia forficata (Fabaceae). Agonisti...