Og DeSouza

Og DeSouza
Universidade Federal de Viçosa (UFV) | UFV · Departamento de Entomologia

PhD

About

127
Publications
32,983
Reads
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1,753
Citations
Introduction
Termitologist, with a hint of community and behavioural ecology and some skill on statistics, specially GLM. Currently working on determinants of termite nest cohabitation by termitophiles and inquilines.
Additional affiliations
November 2017 - present
Universidade Federal de Viçosa (UFV)
Position
  • Professor
August 2010 - July 2011
UK Centre for Ecology & Hydrology
Position
  • Visiting Scientist
Description
  • Theoretical research on termitophiles
May 2010 - November 2017
Universidade Federal de Viçosa (UFV)
Position
  • Professor
Education
September 1989 - September 1993
Imperial College London
Field of study
  • Biology

Publications

Publications (127)
Preprint
The study of self-propelled particles is a fast-growing research topic where biologically inspired movement is increasingly becoming of much interest. A relevant example is the collective motion of social insects, whose variety and complexity offer fertile grounds for theoretical abstractions. It has been demonstrated that the collective motion inv...
Article
Most animals move intermittently, pausing or slowing down for short moments and short moves, and darting away towards a new location where to hover again. This pattern occurs at a range of spatial and temporal scales (thence, resembling ‘scale-free’), from the quick inspection of local areas to the sum of all movements performed from birth to death...
Article
A frequently overlooked cost can be involved in mimetic termitophily: excess resemblance to the model may compromise intraspecific recognition lowering fitness for the mimic. We address this problem, inspecting mate-finding behavioural strategies used by Corotoca spp. rove beetles (Staphylinidae: Aleocharinae) which obligatorily cohabit the termita...
Article
Symbiotic associations underlie hierarchical evolutionary transitions being crucial to understanding biological complexity. But which proximate triggers promote the first successful contact between guests and their hosts? We tackle this problem, studying the macro-symbiotic model system comprised by two termite species (Blattodea: Isoptera) cohabit...
Article
Full-text available
Behavioral lab bioassays involving termites must be promptly performed to allow intended observations prior to death from dissecation, typical of these soft-bodied insects. To this end, topic markers have been proposed as an alternative to histological stains which, while not always toxic are inevitably lengthy to apply. Among recommended topic mar...
Article
Full-text available
Metalliferous soils can selectively shape plant species’ physiology towards tolerance of high metal concentrations that are usually toxic to organisms. Some adapted plant species tolerate and accumulate metal in their tissues. These metals can serve as an elemental defence but can also decrease growth. Our investigation explored the capacity of nat...
Article
• Termite nests may offer shelter to a number of species, alleviating the effects of environmental harshness. Certain elevational gradients provide variation on edaphoclimatic features, possibly generating harsh environmental conditions and boosting the number of immigrants seeking shelter within termitaria. Therefore, it is expected that metrics d...
Article
Full-text available
In heterospecific termite‐termite (Blattodea, Isoptera) cohabitation, defensive morphologies are more evident in inquiline soldiers than in the workers. Nevertheless, these latter are prone to present defensive adaptations as well. After all, by living and feeding inside the nest of other species, such workers would suffer less pressure from buildi...
Article
As the number or density of interacting individuals in a social group increases, a transition can develop from uncorrelated and disordered behavior of the individuals to a collective coherent pattern. We expand this observation by exploring the fine details of termite movement patterns to demonstrate that the value of the scaling exponent μ of a po...
Article
Large termite mounds, regionally called Murundus, forming hillocks throughout the Brazilian territory, occur, with different names, across the entire tropical belt. Little is known about the genesis and age of these large biogenic structures in the semiarid zone, where termites have a limited range due to water deficit. We aimed to understand the p...
Article
Meiatermes cretacicus n. sp., an alate termite from the Early Cretaceous Crato Formation, Araripe Basin, northeastern Brazil. The new taxon is similar in many characteristics to other termites from the Araripe Basin, and primitive termites from Spanish amber. The rounded head and pronotum, Y-shaped line, veins Sc, R, Rs and M more heavily sclerotiz...
Article
Meiatermes cretacicus n. sp., an alate termite from the Early Cretaceous Crato Formation, Araripe Basin, northeastern Brazil. The new taxon is similar in many characteristics to other termites from the Araripe Basin, and primitive termites from Spanish amber. The rounded head and pronotum, Y-shaped line, veins Sc, R, Rs and M more heavily sclerotiz...
Article
Full-text available
The journal Sociobiology announces the adoption of a series of editorial innovations that aim to speed up review and publication time, to select high quality articles for publication, to adopt transparent and ethical editorial standards and to reinforce the culture of open acess scientific publishing.
Preprint
Full-text available
Background: Herbivores cause biochemical, physiological, and morphological changes on plants. The ultimate effects of the herbivore activities are damages on the plant's body that can lead from local tissues death to the plant death. The intensity of herbivore attack and the plant's capability to defend itself determine the outcomes of herbivory. W...
Article
Full-text available
In addition to its builders, termite nests are known to house a variety of secondary opportunistic termite species so‐called inquilines, but little is known about the mechanisms governing the maintenance of these symbioses. In a single nest, host and inquiline colonies are likely to engage in conflict due to nestmate discrimination, and an intrigui...
Article
Full-text available
The first representative of the genus Mastotermes Froggatt, 1897 from the Cenozoic of the South America is described here based on seven specimens from the Fonseca Formation, Eocene-Oligocene boundary, Minas Gerais State, southeastern Brazil. Today, Mastotermes is geographically restricted to northern Australia, with only one relict species, Mastot...
Article
Full-text available
Here we present data on distinct stimuli as elicitors of substrate-borne vibrations performed by groups of termites belonging to the species Constrictotermes cyphergaster (Blattodea: Isoptera: Termitidae: Nasutitermitinae). The study consisted of assays where termite workers and soldiers were exposed to different airborne stimuli and the vibrations...
Preprint
Full-text available
The heterospecific termite-termite cohabitation in a single termitarium, so called inquilinism, is a common event whose basal mechanisms remain hypothetical. While some termite hosts have plenty of inquilines, others house only a few. Among these, Constrictotermes cyphergaster are frequently found cohabiting with a single obligate inquiline species...
Preprint
Full-text available
This study is now published in Ecology and Evolution: Hugo, H, Cristaldo, PF, DeSouza, O. Nonaggressive behavior: A strategy employed by an obligate nest invader to avoid conflict with its host species. Ecol Evol. 2020; 10: 8741– 8754. https://doi.org/10.1002/ece3.6572
Data
This is the supplementary material for the manuscript "Peaceful behaviour: a strategy employed by an obligate nest invader to avoid conflict with its host species".
Article
1. Termitophily in some rove beetles is commonly attributed to the striking termite worker resemblance that is provided by the beetles' hypertrophic (‘physogastric’) abdomen. However, a termite nest may offer to a termitophile additional benefits, such as a continuously repaired shelter. 2. This could apply to Corotoca melantho (Aleocharinae: Corot...
Article
The presence of foreign organisms in the colonies of social insects could affect energy allocation to growth and reproduction of these hosts. Highly specialized invaders of such long-lived hosts, however, can be selected to be less harmful. After all, it pays for these symbionts to keep their host’s good health thereby prolonging cohabitation in th...
Article
Full-text available
Laboratory bioassays require strategies to minimize stress and keep animals alive as long as the test demands. Sometimes, however, experimental procedures seem notoriously stressful as, for instance, when exposing termites to the illumination needed for video recordings. Being a condition opposed to what termites naturally experience, light might e...
Article
Full-text available
Termites play an important role as ecosystem engineers in many tropical environments, acting as herbivore-detritivore organisms and strongly influencing vegetation structure and composition by modifying soil properties, providing nutrients by recycling the organic matter, and direct feeding on plants, notably in the Cerrado (Savanna) of Brazil. To...
Article
Full-text available
Inter-specific symbiotic links are often reinforced by morphological, physiological, or behavioural trait modification undergone by the associated species. In some cases, such as in physogastric termitophile staphylinids, such modifications do facilitate the social interaction. Here we inspect chemical traits of the physogastric staphylinid Corotoc...
Article
In termites, substrate-borne vibrations play an important role in communication among nestmates, including the foraging decisions and the detection of enemies. The adaptive significance of such an ability has led to an ever increasing number of studies aimed at improving knowledge on vibroacoustic communication in these insects. Such studies are co...
Article
Resource density can regulate the area that animals use. At low resource density, there is a conflict in terms of balance between costs of foraging and benefits acquired. The foraging of the higher termite Nasutitermes aff. coxipoensis consists of searching throughout trails and a building galleries phase. 2. In this study, a manipulative field exp...
Article
Full-text available
Symbiosis, the living-together of unlike organisms, underlies every major transition in evolution and pervades most ecological dynamics. Among examples of symbioses, the simultaneous occupation of a termite nest by its builder termites and intruding invertebrate species (so-called termitophily) provides suitable macroscopic scenarios for the study...
Article
Full-text available
Plants produce volatile chemical compounds that can negatively affect the preference (antixenosis) or the performance (antibiosis) of herbivorous insects. It is thought that these volatile compounds are used as cues by herbivorous insects to determine the suitability of the plant for egg deposition and, hence, offspring performance. Here, we invest...
Book
Full-text available
El presente libro trata sobre un tema actual y vigente: el entorno urbano –las ciudades–. En él, un grupo interdisciplinario conformado por físicos, biólogos, arquitectos, economistas, diseñadores y urbanistas, discuten sus ideas y visiones guiados y unificados bajo el paradigma y enfoque de la complejidad. Se trata de entender y explicar fenómenos...
Article
Termite inquilines specialize on living in and feeding on a host termite nest. However, the mechanisms allowing survival of two mutually hostile populations confined to a single nest are not understood. Here we report on inquiline termites that respond to their host's alarm cues. Upon detecting these cues, the inquilines do not join in with the hos...
Article
Full-text available
The living-together of distinct organisms in a single termite nest along with the termite builder colony, is emblematic in its ecological and evolutionary significance. On top of preserving biodiversity, these interspecific and intraspecific symbioses provide useful examples of interindividual associations thought to underly transitions in organic...
Data
Appendix S1. Compartmentalization of plant‐pollinator datasets. Appendix S2. Analysis of size‐restricted data. Figure S1. The properties of the mutualistic plant‐pollinator (“PP”) and antagonistic host‐parasitoid (“HP”) communities with sizes between 10 and 70 species. Figure S2. A principal component projection of community properties show in F...
Article
Full-text available
Abstract Behavioural responses of organisms are frequently affected by variation in resource availability. For eusocial insects, the nutritional status of the colony can modulate responses to chemical cues determining intra- and inter-colonial aggressiveness. Species co-occurrence in termites seems to be modulated by resource availability. Here, we...
Article
Full-text available
The analysis of ecological networks is generally bottom-up, where networks are established by observing interactions between individuals. Emergent network properties have been indicated to reflect the dominant mode of interactions in communities that might be mutualistic (e.g., pollination) or antagonistic (e.g., host–parasitoid communities). Many...
Article
Resource can regulate animal foraging range, which in turn determines the chances of species co-occurrence. Here, we addressed the question of whether resource determines the co-occurrence of soil-forager termite species (i.e. those foraging in subterranean tunnels). Eight quadrats (4 × 4 m) were marked in seven sites of Brazilian Atlantic rainfore...
Article
Full-text available
Termites are important ecosystem engineers that improve primary productivity in trees and animal diversity outside their mounds. However, their ecological relationship with the species nesting inside their mounds is poorly understood. 2. The presence of termite cohabitant colonies inside 145 Cornitermes cumulans mounds of known size and location wa...
Chapter
Termites are key organisms in tropical soil processes, accounting for a marked role in pedobioturbation and nutrient cycling. We report on the mound-building termite effects across a representative soil/vegetation gradient in Ironstone Rupestrian Grassland (canga) in Carajás, Brazilian Amazonia. This complex is formed by three main different enviro...
Article
Structural and functional traits of organisms are known to be related to the size of individuals and to the size of their colonies when they belong to one. Among such traits, propensity to inquilinism in termites is known to relate positively to colony size. Larger termitaria hold larger diversity of facultative inquilines than smaller nests, where...
Data
Raw data used in all performed analyses. (ZIP)
Article
Full-text available
Alarm signalling is of paramount importance to communication in all social insects. In termites, vibroacoustic and chemical alarm signalling are bound to operate synergistically but have never been studied simultaneously in a single species. Here, we inspected the functional significance of both communication channels in Constrictotermes cyphergast...
Article
Full-text available
Olfaction is fundamental for most animals and critical for different aspects of triatomine biology, including host-seeking, reproduction, avoidance of predators, and aggregation in shelters. Ethological and physiological aspects of these olfactory-mediated behaviors are well understood, but their molecular bases are still largely unknown. Here we i...
Article
Full-text available
The objective of this research was to develop a methodology to describe the movement of the coffee berry borer Hypothenemus hampei (Coleoptera: Curculionidae) in the field through: (i) the evaluation of allele variation of a microsatellite marker on polymorphic Colombian H. hampei populations; (ii) the invention of a device for releasing H. hampei...
Article
Full-text available
Animal movements have been related to optimal foraging strategies where self-similar trajectories are central. Most of the experimental studies done so far have focused mainly on fitting statistical models to data in order to test for movement patterns described by power-laws. Here we show by analyzing over half a million movement displacements tha...
Conference Paper
Full-text available
In order to understand the population dynamics of the Coffee Berry Borer (CBB), Hypothenemus hampei (Ferrari), and their behavior in the context of phenological crop in diversed scenarios of climate variability on coffee production, research was carried out to describe the movement of CBB in the field and to compare its population dynamics between...
Book
Full-text available
Advances in molecular biology, remote sensing, systems biology, bioinformatics, non-linear science, the physics of complex systems and other fields have rendered a great amount of data that remain to be integrated into models and theories that are capable of accounting for the complexity of ecological systems and the evolutionary dynamics of life....
Article
Full-text available
Cooperation is a widespread natural phenomenon yet current evolutionary thinking is dominated by the paradigm of selfish competition. Recent advanced in many fronts of Biology and Non-linear Physics are helping to bring cooperation to its proper place. In this contribution, the most important controversies and open research avenues in the field of...
Article
Full-text available
Social insects can live in densely populated colonies where mortality risks are increased by inter-individual transmission of pathogens. Thus, diverse strategies are employed against such infection risks, including the display of sophisticated behavioural traits. Considering that the waste of the leaf-cutting ant contains pathogens, worker ants tha...
Article
Full-text available
Termite nests are often secondarily inhabited by other termite species ( = inquilines) that cohabit with the host. To understand this association, we studied the trail-following behaviour in two Neotropical species, Constrictotermes cyphergaster (Termitidae: Nasutitermitinae) and its obligatory inquiline, Inquilinitermes microcerus (Termitidae: Ter...
Poster
Full-text available
Symbiotic interactions are spread throughout all groups of organisms. This kind of association is frequently observed in nest of social insects, in which the ”guest” species are often other eusocial species belonging to the same phylogenetic group of host species. Speci cally for termites (Isoptera), the mechanisms behind symbiotic interaction amon...