26 documents found, page 1 of 3
Effects of sex and altitude on nutrient, and carbon and nitrogen stable isotope...
Fernandes,G. Wilson; Duarte,Heitor Monteiro; Silveira,Fernando A. O.; Broetto,Fernando; Lüttge,Ulrich; Rennenberg,HeinzABSTRACT Previous ecological studies of dioecious plant species have found that female plants preferentially occur at lower altitudes where there are typically better nutritional conditions, while male plants often occur in less favorable sites. We compared the ecophysiological performance of male and female plants in three populations of the dioecious Baccharis concinna, an endemic species of rupestrian grassl...
Ecophysiological performance of a threatened shrub under restored and natural c...
Castro,Silvana A. B.; Sá,Camila E. M.; Mourão,Fabiana A.; Duarte,Heitor M.; Fernandes,G. Wilson; Lemos-Filho,José P.Ecophysiological responses of plants are useful for monitoring the success of ecological restoration projects that target species conservation. In this study we evaluated the ecophysiological traits of individuals of Chamaecrista semaphora from a natural population and from a site under restoration. Water potential and chlorophyll a fluorescence parameters were measured both in adult and young plants of the two...
A relict species restricted to a quartzitic mountain in tropical America: an ex...
Barbosa,Newton Pimentel de Ulhôa; Fernandes,G. Wilson; Sanchez-Azofeifa,ArturoABSTRACTWe examined the distribution of Coccoloba cereifera,a tropical endemic species that occurs in a small area in the Espinhaço mountain range, southeastern Brazil. It is hypothesized that its narrow distribution is strongly related to the spatially scattered distribution of sandfields. However, this soil type extends far beyond the small region where C. cereifera is currently found, indicating that other f...
Hemiparasitism effect on Baccharis dracunculifolia DC. and consequences to its ...
Bahia,Thaise de Oliveira; Zúñiga,Irene Gélvez; Souza,Matheus Lopes; Coutinho,Etiene Silva; Quesada,Mauricio; Fernandes,G. WilsonABSTRACTMistletoes obtain nutrients and water from their hosts, with varying effects among those hosts. We assessed the factors that influence the colonization of the mistletoe Struthanthus flexicaulis on Baccharis dracunculifolia and the subsequent effects on host performance. We evaluated the incidence of S. flexicaulis according to size (height classes) and architecture of the host as well as its effects on ...
Growing straight versus growing decumbent: soil quality and allometry in Syagru...
Miola,Deise Tatiane Bueno; Fernandes,G. WilsonABSTRACTSyagrus glaucescens is an endemic palm found in the rupestrian grasslands of the Espinhaço Mountains in southeastern Brazil. It is highly associated with quartzitic soils and exhibits strong intra-specific morphological variation in the different areas where it occurs. Allometric traits were used to verify whether there are any significant differences in the morphological traits between populations of t...
Fenologia reprodutiva e vegetativa de arbustos endêmicos de campo rupestre na S...
Belo,Renata M.; Negreiros,Daniel; Fernandes,G. Wilson; Silveira,Fernando A.O.; Ranieri,Bernardo D.; Morellato,Patrícia C.Os Campos rupestres têm destaque no cenário mundial da conservação por sua enorme riqueza em espécies e alta taxa de endemismo. É considerado um ecossistema ameaçado devido à intensa e progressiva descaracterização que vêm sofrendo pela ação antrópica. O objetivo deste estudo foi descrever os padrões fenológicos reprodutivos e vegetativos em seis espécies arbustivas endêmicas dos campos rupestres da Cadeia do E...
Richness of gall-inducing insects in the tropical dry forest (caatinga) of Pern...
Santos,Jean Carlos; Almeida-Cortez,Jarcilene Silva de; Fernandes,G. WilsonDiversity of gall-inducing insects in the tropical dry forest (caatinga) of Pernambuco. We report on the richness of galling insects in the vegetation of caatinga of Pernambuco state, Brazil. We recorded 64 different types of galls collected primarily from leaves and stems of 48 species of host plants belonging to 17 families and 31 genera. The most common gall morphological types were spheroid and discoid, gla...
Spatial distribution of a spherical gall (Hymenoptera, Eulophidae) on Caryocar ...
Leite,Germano Leão Demolin; D'Ávila,Vinicius de Abreu; Cerqueira,Vinicius Matheus; Nascimento,Aline Fonseca do; Fernandes,G. WilsonWe obtained the first data on spatial distribution of a spherical galling insect (Hymenoptera, Eulophidae) at the Caryocar brasiliense Camb. (Caryocaraceae) tree level. This work was developed in two pastures in Montes Claros, Minas Gerais State, Brazil. The areas studied were: pasture 1 (in activity) and pasture 2 (abandoned pasture = savanna in recovery). We evaluated the distribution of spherical galls in: f...
Pattern of attack of a galling insect reveals an unexpected preference-performa...
Santos,Jean C.; Silveira,Fernando A. O.; Pereira,Ellen C.; Fernandes,G. WilsonPattern of attack of a galling insect reveals an unexpected preference-performance linkage on medium-sized resources. The Plant Vigor Hypothesis (PVH) predicts oviposition preference and higher offspring performance on longer and fast-growing shoots, and although several studies have tested its predictions, long-term studies concerning the patterns of host selection by galling species are still lacking. The PVH...
A new species of Bruggmanniella (Diptera, Cecidomyiidae, Asphondyliini) associa...
Maia,Valéria Cid; Fernandes,G. Wilson; Oliveira,Lázaro A.Bruggmanniella doliocarpi, a new galling species associated with Doliocarpus dentatus (Dilleniaceae) is described and illustrated (male, female, pupa, larva and gall) based on material from Minas Gerais, Brazil. The new species is compared to the other known Neotropical species. This is the first report of Bruggmanniella for Minas Gerais and in association with Dilleniaceae.