ARTIGOS PUBLICADOS EM PERIÓDICOS

P070-99 The taxonomy of some Swartzieae (Leguminosae, subfam. Papilionoideae) from Southeastern Brazil Mansano VF, Tozzi AMG* Three new species of Swartzieae are described and illustrated: Swartzia alternifoliolata, S. capixabensis and Zollernia cowanii. Swartzia apetala var. blanchetii and var. subcordata are considered to be synonyms of S. apetala var. apetala, and S. grazielana a synonym of S. macrostachya var. macrostachya. Keys to southeastern Brazil members of Swartzia and Zollernia are provided. Brittonia 51: 149-158, 1999. IF= 0.216 *E-mail: anatozzi@unicamp.br

P071-99 A new species of Aspidosperma Mart. (Apocynaceae) from SE Bahia, Brazil Marcondes-Ferreira W The genus Aspidosperma Mart. occurs from Mexico to N Argentina (except Chile) and on the Antillean island of Hispaniola. It includes 44 species and is divided into two subgenera A Mart. Subgen. Aspidosperma and A. subgen. Coutinia (Vell.) Marc.-Ferr., the former subdivided into nine sections. A new species belonging to A. subgen. Aspidosperma sect. Aspidosperma collected in SE Bahia (Brazil) is here described. Brittonia 51 (1): IF= 0.216 P072-99 The vegetation of granite outcrops in Rio de Janeiro, Brazil and the need for its protection Meirelles ST, Pivello VR, Joly CA* Rock outcrop communities usually receive very little attention from scientists and environmentalists. We examined the vegetation occurring in eight gneiss-granite rock outcrops at Rio de Janeiro State (Brazilian Atlantic coast) which exists in natural associations on soil islands. A total of 86 vascular plant species, belonging to 30 families, was found on 347 soil islands. Bromeliaecae, Asteraceae and Velloziaecae species were the most frequent plants, many of them endemic to these habitats. Each outcrop presented high values of the Shannon-Wiener index of species diversity. Species richness was very dependent on the total area, and high beta diversity was observed amongst sites. Despite their uniqueness as habitats, their possession of several endemic species and the fragility of the ecosystem involved, Brazilian rock outcrops are not protected by specific environmental legislation and we propose urgent actions for their protection.Environmental Conservation 26: 10-20, 1999. IF= 0.610 *E-mail: cjoly@unicamp.br

P073-99 Ultrastructural observations on the foliar secretory cavities of Porophyllum lanceolatum DC (Asteraceae) Monteiro WR, Fahn A, Caldeira W, Castro MM* The ultrastructure of foliar secretory cavities of Porophyllum lanceolatum DC. was studied at three developmental phases, and shows to have the basic characteristics of terpene-secreting glands. The ability to secrete is already present in young, differentiating cavities. The ER in seen to be associated with plastids (periplastidal ER), mitochondria and the nuclear envelope, seeming to play a role in transporting the secretory material from these organelles to the plasmalemma. Multivesicular, multilamellar and mixed bodies were also observed, as well as microbodies (associated with ER in some cases), in the epithelial cells. In the cells of the gland sheath the walls are thicker than those of the epithelial cells; starch is often present in their plastids.Flora 194:113-126, 1999. IF= 0.693 *E-mail: mariliac@unicamp.br

P074-99 The perching bird Coereba flaveola as a co-pollinator of bromeliad flowers in southeastern Brazil Sazima M, Sazima I Hummingbirds are the only previously recorded bird pollinators of ornithophilous bromeliads in southeastern Brazil. The pollination of three species of Bromelioideae by the Bananaquit Coereba flaveola, a perching bird was studied here. Flowers of the bromeliads Aechmea bromeliifolia, A. distichanta, and Acanthostachys strobilacea are visited by this perching bird, as well as by hummingbirds. The Bananaquit perches on the inflorescences and probes within the narrow corolla with its slender bill, fully opening the flower in order to reach the nectar. The flowers visited by the Bananaquit are pollinated during its periodic visits to the plants.Canadian Journal of Zoology 77: 47-51, 1999. IF= 0.975 *E-mail: msazima@unicamp.br

P075-99 Bat-pollinated flower assemblages and bat visitors at two Atlantic forest sites in Brazil Sazima M, Buzato S, Sazima I A comparison betwen bat-pollinated plant assemblages in different altitudinal ranges covered by the Atlantic rainforest in southeastern Brazil is presented. The lowlands (5-90m) harbour 10 plant species in seven families, pollinated mostly by three glossophagine bat species. The highlands (1540-1600m) harbour seven plant species in five families, pollinated by a single species of glossophagine.The ratio between bat-pollinated and hummingbird-pollinated species is 0.24 at the lowland site and 0.23 at the highland one. These close values indicate that additional studies on bat and bird-pollinated assemblages are worthy at other sites of the Atlantic rainforest.Annals of Botany 83:705-712, 1999. IF= 1.301 E-mail: msazima@unicamp.br

P076-99 The pollination mechanism in the Pelexia alliance (Orchidaceae: Spiranthinae) Singer RB, Sazima M* The biological function of the wedge-like,dorsally adhesive viscidium of the neotropical orchid genera Cyclopogon, Pelexia and Sarcoglottis is elucidated by the study of the pollination biology of three species occurring in São Paulo State, southeastern Brazil. Our results suggest that some kind of phylogenetic constraint may exist, impeding the occurrence of pollinators other than bees in these orchid genera. Botanical Journal of the Linnean Society 131: 249-269, 1999. IF= 0.763 *E-mail: msazima@unicamp.br

P077-99 A simple solid injection device for the analyses of Bulbophyllum (Orchidaceae) volatiles Silva UF, Borba EL, Semir J*, Marsaioli AJ Volatile components of three orchid species were detected using GC/MS. Due to the minute dimension and amount of flowers, special traps and extraction methods were applied and the analyses was finally successful using a special solid sample injector which was constructed in our own laboratory. The chemical composition comparison revealed high similarity between the volatiles present in Bulbophyllum weddellii and B. involutum, which is coherent with the pollinator sharing differing from the volatiles of B. ipanemense, a species pollinated by other pollinator species. Phytochemistry 50: 31-34, 1999. IF= 1.165 *E-mail: semir@unicamp.br

P078-99 Técnicas usuais de estimativa da biodiversidade Martins FR, Santos FAM São introduzidos os principais índices de diversidade, dentre os mais usados na literatura especializada. Os índices são classificados como medidas de riqueza (tipo I), medidas de abundância (tipo II) e medidas de heterogeneidade (tipo III). O significado de cada índice, suas vantagens e desvantagens e as situações em que seu uso é mais conveniente são discutidos. A influência da técnica de amostragem, especialmente o tamanho mínimo amostrável, sobre os resultados dos índices também é abordada. Algumas das principais questões sobre a estimativa da biodiversidade são discutidas: quais dados devem ser levantados? É mais conveniente usar área ou número de indivíduos amostrados? Quais índices devem ser usados? Como fazer comparações? Ressalta-se que uma medida de diversidade é um parâmetro extremamente reducionista, que objetiva expressar toda a complexidade estrutural, a riqueza específica e as interações bióticas e abióticas de uma comunidade ecológica através de um único número. Além disso, embora alguns padrões mundiais sejam conhecidos (como, por exemplo, a relação direta entre diversidade e produtividade primária e a relação inversa entre diversidade e latitude), geralmente a diversidade é tomada em relação a um táxon de uma certa categoria, admitindo-se a premissa de que a diversidade desse táxon represente a diversidade do sistema analisado. Além disso, ainda não há uma maneira bem estabelecida de expressar a biodiversidade de uma comunidade como um todo.Revista Holos 1: 236-267, 1999 E-mail: fmartins@correionet.com.br; fsantos@unicamp.br

P079-99 Fisionomia e organização da vegetação de carrasco no planalto da Ibiapaba, nordeste do Brasil Araujo FS, Martins FR* O carrasco no planalto da Ibiapaba constitui formação vegetal própria? Para responder a essa questão, mediram-se a altura vertical (menos das trepadeiras) e o diâmetro basal (a partir de 3cm) do caule de plantas lenhosas e extraíram-se alíquotas de solo (0-50cm, 50-100cm de profundidade) de 100 parcelas (10 x 10m) aleatórias em Jaburuna (3º54'S e 400º59'24W, altitudes em torno de 830m), município de Ubajara, Estado do Ceará. Dados de clima, solo, diâmetro, altura, densidade, área basal e fisionomia foram comparados com os levantados por outros autores em carrasco, caatinga e cerrado no nordeste. O carrasco ocorre sob precipitação anual média entre 668 e 1.289mm e temperaturas entre 22 e 24ºC, sobre solo de Areias Quartzocas álicas, em altitudes entre 700 e 900m; tem densidade maior e área basal menor que a caatinga e o cerrado, diâmetros pequenos e similares, altura vertical média entre 3,7 e 5,4m. Difere da caatinga, do cerrado (e do cerradão) e da capoeira em vários aspectos do ecótopo, da organização e da fisionomia, sendo formação vegetal própria, que pode ser caracterizada como fruticeto caducifólio alto, fechado, uniestratificado, com trepadeiras, dossel irregular e árvores emergentes esparsas.Acta Botannica Brasilica 13: 1-13, 1999 *E-mail: fmartins@correionet.com.br

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