02096nas a2200181 4500008004100000245007800041210006900119300001200188490000700200520151600207653003801723653002301761653002501784100002301809700002101832700001701853856004401870 2013 eng d00aDo edaphic aspects alter vegetation structures in the Brazilian restinga?0 aDo edaphic aspects alter vegetation structures in the Brazilian  a613-6230 v273 a

The vegetation of the Brazilian restinga (coastal woodland) presents a variety of species and different characteristics,
encompassing fields, fruit groves and forests on quartzarenic neosols. We hypothesised that the structure of the
restinga landscape along the coast of the state of Piauí is influenced by edaphic factors and presents a pattern similar
to that of other northeastern restingas. We evaluated three restingas in Piauí, using the quarter method to determine
their structure. Composite soil samples were collected to determine their chemical and physical properties. Edaphic
variables were correlated with plant species by canonical correspondence analysis (CCA). Phytosociological data for all
three areas indicated regenerating vegetation comprising several small individuals, 82.5% of which showed a diameter
at ground level ≤ 13 cm. We also observed considerable tillering. In two of the areas, there was a predominance of
Fabaceae species, such as Caesalpinia pyramidalis and Copaifera martii. Although the structural characteristics of the
restingas studied were similar to those of other northeastern restingas, the former showed lower Shannon diversity
indices (2.18-2.44). The CCA indicated that species distribution was influenced by edaphic factors such as pH, aluminium content and amount of organic matter. The restingas studied were similar to others along the Brazilian coast.

10acanonical correspondence analysis10acoastal vegetation10aedaphic interactions1 aSantos-Filho, F.S.1 aAlmeida_Jr, E.B.1 aZickel, C.S. uhttps://bionoset.myspecies.info/node/3101903nas a2200217 4500008004100000245015000041210007000191300001200261490000700273520121200280653001401492653001201506653001101518653002001529653001301549653001901562100002201581700001801603700002001621856004401641 2008 eng d00aCargas polínicas de abelhas polinizadoras de Byrsonima chrysophylla Kunth. (Malpighiaceae): fidelidade e fontes alternativas de recursos florais0 aCargas polínicas de abelhas polinizadoras de Byrsonima chrysophy a165-1710 v223 a

(Pollen loads of pollinator bees of Byrsonima chrysophylla Kunth. (Malpighiaceae): fidelity and alternative sources of
flower resources). Byrsonima chrysophylla, known as “murici pitanga”, is a shrubby species occurring in ‘restinga’. Among its visitors, bees of the Centridini tribe as well as Xylocopini bees are frequently found. To detect which plant species have been used by the most frequent visitors, pollen loads from the back legs (n = 5) and also from natural nests of Centris caxiensis (n = 7) were treated by acetolysis. During flowering of Byrsonima chrysophylla, this plant species was the main pollen source used by bees. Comolia lythrarioides and Myrcia sylvatica were secondary pollen sources, Mouriri guianensis was a secondary oil and pollen source, while Anacardium microcarpum, Cuphea tenella, Matayba discolor and Phthirusa pyrifolia were important nectar sources at this time. The pollen detected in the samples probably adhered to the bee’s body during nectar collection. The results show that the bee visitors do not mix pollen sources during the pollen-collecting flight, thus representing fidelity to Byrsonima chrysophylla flowers.

10aByrsonima10aCentris10apollen10apollen fidelity10aXylocopa10a‘restinga’1 aRibeiro, E.K.M.D.1 aRêgo, M.M.C.1 aMachado, I.C.S. uhttps://bionoset.myspecies.info/node/28