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/3102139nas a2200193 4500008004100000245007700041210007000118260001600188300000900204490000700213520155900220100002501779700001901804700002701823700000501850700002201855700002401877856004401901 2013 eng d00aThe Araceae in CearĂ¡, Brazil: humid forest plants in a semi-arid region0 aAraceae in CearĂ¡ Brazil humid forest plants in a semiarid region c24 Sep 2013 a1-330 v643 a

The study consists of a taxonomic treatment of the Araceae of Ceará, a state lying within Brazil’s semi-arid region. The aroid flora shows greater similarity to those of central Brazil and Amazonia than to the Atlantic forest. Most species occur in humid forest fragments - the “florestas serranas”. Geophytes are also found in caatinga and dry forest (Taccarum ulei) and lithophytes on rock outcrops in dry forest (Philodendron acutatum). Floating aquatics occur in ponds and lakes throughout the state (Pistia stratiotes, Lemna aequinoctialis, Lemna minuta, Spirodela intermedia, Wolffia columbiana, Wolffiella welwitschii), and freshwater helophytes (Montrichardia linifera) along river margins. 28 taxa (species and varieties) in 19 genera are described and most are illustrated: Anthurium (three spp.), Caladium (one sp.), Dieffenbachia (one sp.), Dracontium (one sp.), Lemna (two spp.), Monstera (two spp., one with two varieties), Montrichardia (one sp.), Philodendron (four spp.), Pistia (one sp.), Scaphispatha (one sp.), Spathicarpa (one sp.), Spathiphyllum (one sp.), Spirodela (one sp.), Syngonium (one sp.), Taccarum (one sp.), Wolffia (one sp.), Wolffiella (one sp.), Xanthosoma (two spp.), Zomicarpa (one sp.). New records for Ceará are Dieffenbachia aglaonematifolia, Dracontium nivosum, Monstera adansonii var. laniata, Philodendron sp. aff. ruthianum and the naturalized exotic Typhonium roxburghii. An identification key and data on geographic distribution and conservation status are provided.

1 aAndrade, Ivanilza, M1 aMayo, Simon, J1 aSilva, Francilene, M S1 a1 aMatias, Ligia, Q.1 aRibeiro, Thales, A. uhttps://bionoset.myspecies.info/node/20