Ivone Diniz
Universidade de Brasília - UnB, Departamento de Zoologia, Faculty Member
Moths exhibit different levels of fidelity to habitat, and some taxa are considered as bioindicators for conservation because they respond to habitat quality, environmental change, and vegetation types. In this study, we verified the... more
Moths exhibit different levels of fidelity to habitat, and some taxa are considered as bioindicators for conservation because they respond to habitat quality, environmental change, and vegetation types. In this study, we verified the effect of two phytophysiognomies of the Cerrado, savanna and forest, on the diversity distribution of moths of Erebidae (Arctiinae), Saturniidae, and Sphingidae families by using a hierarchical additive partitioning analysis. This analysis was based on two metrics: species richness and Shannon diversity index. The following questions were addressed: 1) Does the beta diversity of moths between phytophysiognomies add more species to the regional diversity than the beta diversity between sampling units and between sites? 2) Does the distribution of moth diversity differ among taxa? Alpha and beta diversities were compared with null models. The additive partitioning of species richness for the set of three Lepidoptera families identified beta diversity betw...
Research Interests:
... between seasons. Key words. Vespidae, foraging habitats, seasonality, cerrado, Brazil. There is much evidence suggesting that seasonal fluctuations in insectabundance are commonplace in the tropics. Previous studies in ...
Areas: [Ecolog ia (Ec) ] Em ail de contato: julianobc@unb.br Palavras-chave: Florivoria, Qualea, Similaridade faunística. Resumo: Uma hipótese sobre amplitude da dieta de insetos herbívoros tropicais é de que a monofagia é rara e a... more
Areas: [Ecolog ia (Ec) ] Em ail de contato: julianobc@unb.br Palavras-chave: Florivoria, Qualea, Similaridade faunística. Resumo: Uma hipótese sobre amplitude da dieta de insetos herbívoros tropicais é de que a monofagia é rara e a oligofagia é a regra. Plantas congenéricas apresentariam herbívoros similares por terem características físico-químicas semelhantes, sendo incluídas como novas hospedeiras de um herbívoro mais facilmente que plantas não relacionadas. O objetivo do trabalho foi investigar a similaridade de lepidópteros associados a botões florais de três espécies do gênero Qualea (Vochysiaceae). Foram coletadas cem inflorescências de cada espécie de planta na Fazenda Água Limpa (15°55' S, 47°55' W), Distrito Federal, em outubro (Q. parviflora) e em dezembro (Q. grandiflora e Q. multiflora) de 2009, estas foram mantidas no laboratório, para a emergência de adultos que foram depositados na Coleção Entomológica da UnB. Foram obtidos 144 adultos de Lepidoptera pertence...
Palavras-chave: Gelechiidae, Tortricidae, Lycaenidae. Resumo: Os diversos estudos entre as relações de insetos e plantas nos permitem ampliar o entendimento dos padrões observados em tais comunidades, que podem estar relacionados à... more
Palavras-chave: Gelechiidae, Tortricidae, Lycaenidae. Resumo: Os diversos estudos entre as relações de insetos e plantas nos permitem ampliar o entendimento dos padrões observados em tais comunidades, que podem estar relacionados à seleção de características tanto nas plantas quanto em seus herbívoros. O gênero Miconia é considerado o mais representativo da família Melastomataceae, apresentando principalmente arbustos, mas podendo haver árvores de até 15m de altura. O objetivo do trabalho foi investigar e comparar a fauna de lagartas (Lepidoptera) associada ás inflorescências de 3 plantas no cerrado, para determinar a diversidade e o compartilhamento de lepidópteras entre elas. Foram coletadas cem inflorescências de cada espécie de planta hospedeira, M. fallax (08/09/2009), M. ferruginata (24/08/2009) e M. pohliana (26/08/2009) na Fazenda Água Limpa -UnB, Distrito Federal. No laboratório cada ramo de inflorescência foi colocado em um pote plástico, fechado com filó e mantido no labo...
Fire effects in cerrado abundance insects: what we know? ABSTRACT - Insect abundance seasonal patterns have only been investigated for some insect orders in the cerrado region. The region has a long term history of fire events but even... more
Fire effects in cerrado abundance insects: what we know? ABSTRACT - Insect abundance seasonal patterns have only been investigated for some insect orders in the cerrado region. The region has a long term history of fire events but even basic information on the fire effect on insect abundance is unknown. Thus, our study concerns the effect of fire on insect abundance in the savanna-like vegetation of the central Brazilian cerrado in Distrito Federal. The insects were sampled by window, malaise tent and pitfall traps within one year, in two preserved and two burnt study areas of campo sujo and cerrado sensu strict respectively. We used a total number of insects captured to analyses the fire effect on insect abundance. Individuals of 15 Orders were collected but only seven orders were the most abundant in all studied areas independently of type vegetation and the previous occurrence of fire. The insect abundance was higher on both burnt study areas than their preserved areas. Insects l...
Dentre as interações inseto-planta, a herbivoria tem maior efeito destrutivo sobre a sobrevivência e a reprodução das plantas, uma vez que os insetos podem danificar as folhas, órgãos reprodutivos entre outras partes primordiais para a... more
Dentre as interações inseto-planta, a herbivoria tem maior efeito destrutivo sobre a sobrevivência e a reprodução das plantas, uma vez que os insetos podem danificar as folhas, órgãos reprodutivos entre outras partes primordiais para a planta. Galhas ou cecídias são transformações atípicas do tecido dos vegetais, causada pela indução mecânica e/ou química de organismos como insetos, vírus, bactérias e fungos. Em locais de solo seco e infértil, como no Cerrado, onde existem mais plantas esclerofilas, com maior longevidade das partes vegetais ocorre o favorecimento para o desenvolvimento de insetos indutores de galhas. Myrcia rostrata (Myrtaceae) é uma árvore com características típicas de áreas abertas de cerrado, que floresce nos meses de novembro a dezembro. Não há registro do estudo morfológico de galhas em M. rostrata e seus indutores. Este estudo teve como objetivo realizar um primeiro levantamento do tipo de galha e insetos indutores em M. rostrata no cerrado do Distrito Federa...
Areas: [Ecolog ia (Ec) ] Em ail de contato: cesinhabio22@hotmail.com Palavras-chave: Pyralidae, polifagia, Dimorphandra. Resumo: A dieta de insetos herbivoros em difentes ambientes vem sendo intensamente discutida e tem implicações... more
Areas: [Ecolog ia (Ec) ] Em ail de contato: cesinhabio22@hotmail.com Palavras-chave: Pyralidae, polifagia, Dimorphandra. Resumo: A dieta de insetos herbivoros em difentes ambientes vem sendo intensamente discutida e tem implicações diretas nas estimativas de riqueza locais. Os estudos desenvolvidos envolvem principalmente insetos folívoros externos, e sugerem que em ambientes tropicais essa fauna tende a ser mais especialista que em ambientes temperads, resultando em estimativas superiores de riqueza. Esse fato deve ser ainda mais evidente quando verificamos insetos endófagos, conhecidos por apresentar dietas restritas. O objetivo desse trabalho foi observar a dieta de Phidotricha erigens (Pyralidae), uma lepidóptera endófaga, associada a botões florais de plantas do cerrado. Foram coletadas cem inflorescencias de cada espécie de planta hospedeira (N = 30 espécies) na fazenda Agua Limpa -DF, de maio a dezembro de 2009. Estas foram mantidas no laboratório por dois meses, para a emerg...
Em comunidades de insetos herbívoros, as plantas hos-pedeiras se apresentam como um recurso variável e he-terogêneo, afetando a distribuição dos mesmos (Mar-ques et al., . 2000). Flores e folhas são recursos utilizados por insetos, que... more
Em comunidades de insetos herbívoros, as plantas hos-pedeiras se apresentam como um recurso variável e he-terogêneo, afetando a distribuição dos mesmos (Mar-ques et al., . 2000). Flores e folhas são recursos utilizados por insetos, que diferem, por exemplo, em estruturas de defesa (Strauss et al., . 2004), resul-tando em fauna específica associada (Smallegange et al., . 2007), o que pode resultar em grupos distintos de herbívoros em cada tipo de recurso utilizado (Morais et al., . 2009). O grau de especialização dos insetos herbívoros pode variar desde espécies altamente especializadas, também chamadas de monófagas, até espécies com extensa am-plitude de dieta, conhecidas como polífagas. Os insetos que apresentam dieta especializada são maioria em di-versos grupos taxonômicos (Bernays & Graham 1988), resultado de forças seletivas que direcionam a interações específicas entre inseto -planta (Nosil 2002). A riqueza de insetos herbívoros pode variar entre espécies de plan-tas hospedeir...
Abstract – The objective of this work was to evaluate the influence of soybean volatiles, induced by the herbivory of the stink bugs Euschistus heros and Nezara viridula, on the host searching behavior of the parasitoids Telenomus podisi... more
Abstract – The objective of this work was to evaluate the influence of soybean volatiles, induced by the herbivory of the stink bugs Euschistus heros and Nezara viridula, on the host searching behavior of the parasitoids Telenomus podisi and Trissolcus basalis. Plants injured by the feeding activity of the stink bugs were used as stimuli in bioassays with parasitoid females in a two-choice Y type olfactometer. Telenomus podisi responded only to volatiles released by soybean after herbivory injury of E. heros, their preferential host. Trissolcus basalis did not respond to plants injured by the stink bugs. The obtained results indicate the existence of species‑specific interactions in the tri‑trophic system soybean‑stink bug‑egg parasitoids. Index terms: searching behavior, biological control, preferential host, tri‑trophic interactions, two choice olfactometer, plant volatiles.
Research Interests:
A list of lycaenid butterflies reared on inflorescences is provided and discussed. Over 13,000 inflorescences from 35 plant families of the cerrado (a region with savanna-like vegetation) of Distrito Federal, Brazil, were examined. Larvae... more
A list of lycaenid butterflies reared on inflorescences is provided and discussed. Over 13,000 inflorescences from 35 plant families of the cerrado (a region with savanna-like vegetation) of Distrito Federal, Brazil, were examined. Larvae were reared in the laboratory and 321 adults from 38 lycaenid species were obtained from 55 plant species belonging to 24 families. A compilation of the host plant records is also presented based on data available in the literature. Our study points out that the sampling effort for obtaining immature stages of lycaenids in cerrado vegetation is crucial for a better understanding of the diversity and biology of these butterflies. Many species listed in this paper are widespread and tend to be locally polyphagous (using inflorescences of more than one plant family) or oligophagous (restricted to only one plant family). Some plant families, such as Proteaceae, Malpighiaceae, and Vochysiaceae, showed higher species richness and abundance of larvae than...
In order to contribute to taxonomic information on Tetranychid mites (Acari: Tetranychidae) in South America, surveys were conducted in Brazil (15 States and the Federal District) and Uruguay (one Department); 550 samples of 120 plant... more
In order to contribute to taxonomic information on Tetranychid mites (Acari: Tetranychidae) in South America, surveys were conducted in Brazil (15 States and the Federal District) and Uruguay (one Department); 550 samples of 120 plant species were collected. Tetranychid mite infestations were confirmed in 204 samples, and 22 species belonging to seven genera of the Bryobiinae and Tetranychinae subfamilies were identified on 58 different host plants. Thirty-six new plant hosts were found in Brazil, South America, and worldwide for the following species: Eutetranychus banksi (McGregor); Mononychellus tanajoa (Bondar); Oligonychus anonae Paschoal; O. mangiferus (Rahman and Sapra); Tetranychus bastosi Tuttle, Baker and Sales; T. desertorum Banks, 1900, T. evansi Baker and Pritchard; T. ludeni Zacher; T. mexicanus (McGregor); T. neocaledonicus André; and T. urticae Koch. Four new localities in Brazil were reported for Eotetranychus tremae De Leon; O. anonae; Panonychus ulmi (Koch); and T...
Research Interests:
Taxonomic misidentification of the specimens used to obtain DNA sequences is a growing problem reported for different groups of organisms, which threatens the utility of the deposited sequences in public DNA databases. This paper provides... more
Taxonomic misidentification of the specimens used to obtain DNA sequences is a growing problem reported for different groups of organisms, which threatens the utility of the deposited sequences in public DNA databases. This paper provides new evidence of misidentifications in molecular DNA public databases in phytophagous mites of the Tetranychidae family belonging to the group Tetranychus (Tetranychus). Several species in this group are of economic and quarantine importance in agriculture and among them Tetranychus urticae, a highly polyphagous mite causing outbreaks in many crops worldwide, is certainly the most studied. We analyzed and evaluated the identity of 105 GenBank accessions of ITS2 rDNA and 138 COI mtDNA sequences which were deposited as T. urticae and those of 14 other taxa morphologically closely related to Tetranychus sensu stricto. In addition, ITS2 and COI sequences of 18 T. urticae samples collected for this study and identified by morphological criteria, were gen...
Research Interests:
Research Interests:
Research Interests:
Research Interests:
Research Interests:
Research Interests:
Research Interests:
Research Interests:
Research Interests:
Research Interests:
Research Interests:
... 86011-5640, USA Ivone R. Diniz Departamento de Zoologia, Universidade de Brasilia, 70910-900 Brasilia, DF, Brasil Helena С ... Fazenda Água Limpa, 15C55'S, 47°5 5'W), in a typical cerrado sensu stricto of Cen-tral Brazil.... more
... 86011-5640, USA Ivone R. Diniz Departamento de Zoologia, Universidade de Brasilia, 70910-900 Brasilia, DF, Brasil Helena С ... Fazenda Água Limpa, 15C55'S, 47°5 5'W), in a typical cerrado sensu stricto of Cen-tral Brazil. ... 0 / • <u "o 24" / a. x/ •^r (0 о 20-/ / /B a/ о • Í СУ / S* .a E ...
Research Interests:
Research Interests:
Research Interests:
The seasonality of fruit-feeding butterflies is very well known. However, few studies have analyzed the influence of climatic variables and resource availability on butterfly temporal distributions. Morpho helenor achillides(C. Felder &... more
The seasonality of fruit-feeding butterflies is very well known. However, few studies have analyzed the influence of climatic variables and resource availability on butterfly temporal distributions. Morpho helenor achillides(C. Felder & R. Felder, 1867) and M. menelaus (Linnaeus, 1758) (Nymphalidae) were used as models to investigate the influence of climatic factors and food resources on the temporal distribution of these Morphinae butterflies. These butterflies were collected weekly, from January 2005 to December 2006, in the Parque Nacional de Brasília (PNB). In all, 274 M. helenor achillides and 134 M. menelaus were collected, a total of 408 individuals. The relative abundance of the two species was similar in 2005 (n = 220) and 2006 (n = 188). Of the variables considered, only the relative humidity and the resource availability measured in terms of the phenology of the zoochorous fruits of herbaceous plants explained a large proportion of the variation in the abundance of these...
Roupala montana Aubl. (Proteaceae) is an abundant plant species in the cerrado sentido restrito and its leaves are food for diverse herbivores insects, including insect miners that live and feed on leaf parenchyma. The main objective of... more
Roupala montana Aubl. (Proteaceae) is an abundant plant species in the cerrado sentido restrito and its leaves are food for diverse herbivores insects, including insect miners that live and feed on leaf parenchyma. The main objective of this study was to analyse the abundance and the species composition of miners in two areas of cerrado being, one with prescribed fire every two years and another protected from fire. In each area 10 leaves from each of 50 individuals of R. montana were collected. Each leaf was examined in relation to the presence and type of mine. Four types of mines were found and all occurred in the two studied areas, with predominance of the two types round and coil but, the frequency of the types differed between areas. Ninety and eight percent of the plants in burnt area and 90% in the preserved area were attacked by insect miners. The average number of leaves attacked for mines was significantly higher in the burnt area (F = 43,423 p < 0,0001). The results i...
Nine lactiferous plants of five families were examined for caterpillars in a 4 ha cerrado sensu stricto (savanna-like vegetation) area of the University of Brasília Experimental Farm (DF, Brazil), from August 1995 to May 1997. In 5,540... more
Nine lactiferous plants of five families were examined for caterpillars in a 4 ha cerrado sensu stricto (savanna-like vegetation) area of the University of Brasília Experimental Farm (DF, Brazil), from August 1995 to May 1997. In 5,540 censuses, less than 5% of the plants hosted caterpillars. All the caterpillars found, a total of 55 species in 15 families were reared under laboratory conditions. Pyralidae, Geometridae, Elachistidae, Megalopygidae, and Limacodidae were the richest caterpillar families recorded. Of the 55 species, more than 40% were polyphagous, feeding on different host plant families, while 21 were considered rare species with less than four records during the study period. The species' rareness did not permit any analysis of diet breadth. The presence of latex in the host plants seems to affect both the proportion of host plants with caterpillars (abundance) and the caterpillar species richness. The habit of eating plants that characteristically produce latex ...
Research Interests:
Folivore cerrado caterpillars are found on their host species in low frequencies, which vary between plants and throughout the year. We analysed the effects of climatic variation and of the characteristics of two host species (Miconia,... more
Folivore cerrado caterpillars are found on their host species in low frequencies, which vary between plants and throughout the year. We analysed the effects of climatic variation and of the characteristics of two host species (Miconia, Melastomataceae) on caterpillar abundance. The work was carried out in a cerrado sensu stricto area in Brasília, Federal District, Brazil, from May 1998 to September 1999. One hundred plants of each species were inspected monthly. All caterpillars found were collected and raised in the laboratory with Miconia leaves as food sources. Climatic data for the study area and plant characteristics such as local density, spatial distribution, foliar phenology, leaf pilosity and nutritional content were used to test the effects on caterpillar abundance. Less than 10% of the plants had larvae. Caterpillars were more frequent and abundant in M. pohliana, which was also present at higher densities than M. ferruginata. Low caterpillar frequency in host plants and ...