Alexsander Antunes

• PhD
• Researcher at Instituto Florestal

The northern portion of the Serra do Mar mountains in the state of São Paulo, near the border with the state of Rio de Janeiro, including a portion of the Rio Paraíba Valley, ranges between 450 and 1900 m a.s.l. in altitude and is composed of submontane and montane Atlantic Forest. It is unique in that the ornithological knowledge of the region can...

In the state of Sao Paulo, southeastern Brazil, the phytophysiognomy known as Cerrado takes less than 1% of its original cover. Thus, the establishment and management of protected areas are essential to save a significant sample of biodiversity of this environment in the region. The Santa Barbara Ecological Station is one of the largest protected a...

A dispersão de sementes de vegetais exóticos por animais nativos é um dos fatores associados a invasões biológicas. Visando colaborar para maior compreensão sobre o estabelecimento dessa relação, os objetivos do presente trabalho foram comparar os padrões fenológicos de frutificação e caracterizar a assembleia de aves visitantes de duas palmeiras,...

The biodiversity inventory in protected areas from Atlantic Forest can increase knowledge about species distribution and contribute to monitoring and management actions that enhance the ecosystems conservation. Our objectives were to characterize bird assemblages at Carlos Botelho State Park, São Paulo southeastern Brazil, regarding species composi...

The King Vulture Sarcoramphus papa (Linnaeus, 1758) is declining globally and it is listed as threatened with extinction in state of São Paulo, southeastern Brazil. Despite a recent increase in observations of this species, nesting records are scarce in the state. We report a nesting attempt on an observation tower at Estação Ecológica de Angatuba,...

Bird species richness and composition vary along altitudinal gradients in response to differences in abiotic, e.g. temperature, and biotic factors, e.g. vegetation structure. A comparative analysis of two forest bird communities was made at Carlos Botelho State Park, southeastern state of São Paulo. Were selected for sampling areas where the forest...

The remaining cerrado vegetation in the state of São Paulo is restricted to less than 1% of its original cover and distributed in small and isolated fragments. By its importance for biodiversity conservation and the severe threats to which the Cerrado has been submitted, as well as the Atlantic Forest it was included among the global hotspots for b...

The k0-method instrumental neutron activation analysis (k0-INAA) was employed for determining chemical elements in bird feathers. A collection was obtained taking into account several bird species from wet ecosystems in diverse regions of Brazil. For comparison reason, feathers were actively sampled in a riparian forest from the Marins Stream, Pira...

A anta Tapirus terrestris é o maior mamífero terrestre brasileiro. É considerada ameaçada de extinção na categoria vulnerável (VU) nas listas de espécies ameaçadas do Estado de São Paulo e da União Internacional para a Conservação da Natureza e dos Recursos Naturais – IUCN. Apresenta-se o primeiro registro da espécie para a Reserva Florestal do Mor...

Martius, mais conhecida como palmito Juçara, encontra-se atualmente sob o risco de extinção (Governo do Estado de São Paulo, 2003), apesar de ser exigido um plano de manejo sustentável para a sua exploração, os casos de extração ilegal de vêm aumentando (Galetti & Fernandez, 1998). O palmito ocorre no estrato médio da Floresta Ombrófila Densa, desd...

This work presents the proposal of re-categorization of the Várzea do Embu-Guaçu Park, created in 1998 inside a Program of Environmental Sanitation of the Basin of the Guarapiranga, that had for objective the environmental recuperation of the basin with sanitation infrastructure expansion, re-urbanization of shanty towns and implementation of parks...

Diurnal variation in detection can influence bird census results. I measured variation in daily and seasonal detections of birds in a forest fragment at Barreiro Rico ranch, Anhembi, state of São Paulo. Birds were recorded on transects of unlimited distance, sampled one day per month, dawn to dusk, between December 2000 and March 2001 (rainy season...

Antunes, A.Z., Alvarenga, H., Silveira, F.L., Eston, M.R., Menezes, G.V. and Santos, S.R. Leptasthenura setaria (Temminck, 1824) (Aves: Furnariidae) in the state of São Paulo, southeastern Brazil. Biota Neotrop.

Endemic Atlantic Forest bird diversity and dynamics in a semideciduous forest fragment in southeastern Brazil. Considering the loss of the Atlantic Forest and the higher number of endemic bird species which it holds, I studied the endemic bird species richness and diversity in a semideciduous forest fragment of 1451 ha in the São Paulo state, south...

The Araucaria Tit-Spinetail Leptasthenura setaria is found exclusively in Parana-Pine Araucaria angustifolia, being classified as near-threatened by IUCN. We present seven new localities to Araucaria Tit-Spinetail from São Paulo, including the first state specimens. This species was recorded in native or planted Parana-Pine, in five reserves.

We recorded eleven bird species new for the Barreiro Rico farm in Anhembi, in the state of São Paulo, southeastern Brazil. This is one of the best-known birding sites in Brazil. Three hundred and fifty nine species have been recorded after 45 years of ornithological surveys.

The hummingbird Amazilia lactea (Lesson, 1832) built a nest in São Paulo, Brazil, in the spring (Oct) and added lichens during incubation. The female incubated over 70 per cent of the day, 1-56 min per visit, and brooded two small young somewhat less; brooding stopped by about 10 days of age, as did night brooding. Lack of night brooding for large...

The Giant African Snail, Achatina fulica (Mollusca-Achatinidae), considered as one of a hundred worst world's invasive species, causing serious environmental damages, is registered for the first time for Carlos Botelho State Park, county of Sete Barras, state of São Paulo, Brazil.