Structural analysis of the vegetation on a highland granitic rock outcrop in Southeast Brazil

Granitic rock outcrops of the Brazilian southeast are either coastal or inland. The latter can often have high altitudes, such as in the summits of "Serra do Mar" and "Serra da Mantiqueira", where they are known as "Campos de Altitude". The landscape on these high altitude plateaux is often a mosaic of shrubs and treelets within a bunchgrass matrix, with sparse pteridophytes and other herbs, interspersed with variable extensions of rock outcrops. Despite the pervasiveness of rock outcrops in the Brazilian landscape, studies on the structural analysis of the vegetation on such formations are scarce. This study aimed to analyze the structure of the vegetation on a highland granitic rock outcrop in "Parque Estadual da Serra do Brigadeiro", state of Minas Gerais, Southeast Brazil (42°20' - 42°40' S and 20°20' - 21°00' W, 1,722 m of elevation ). Quantitative parameters of absolute and relative frequency and dominance (cover) were estimated. The group analysis used the Jaccard similarity index. Trilepis lhotzkiana, Panicum sp. 1, and Vellozia variegata presented the highest relative frequencies, relative dominances and importance values. These three species, along with Dyckia bracteata, Rhynchospora emaciate, and Tibouchina cf. manicata, represented 98.3% of the relative dominance. The remaining 1.7% referred to 22 remaining species. The distinction among quadrats within formed groups by cluster analysis was due to the great number of low frequency species.

Biomass and chemical composition of Nitella furcata subsp. mucronata var. mucronata f. oligospira (A. Braun) R. D. Wood (Chlorophyta, Characeae) in the littoral region of Ninféias Pond, São Paulo, Southeast Brazil

Temporal variation of Nitella furcata (Roxburgh ex Bruzelius) C. Agardh emend. R. D. Wood subsp. mucronata (A. Braun) R. D. Wood var. mucronata f. oligospira (A. Braun) R. D. Wood biomass and chemical composition were studied at the Ninféias Pond (23°38'18.9" S, 46°37'16.3" W), a mesotrophic reservoir located in the Parque Estadual das Fontes do Ipiranga Biological Reserve, Municipality of São Paulo, Southeast Brazil. Plants were collected monthly from October 1996 to October 1997 at three fixed stations of reservoir's littoral region. Charophyte biomass spatial distribution pattern did not vary significantly throughout the study period at all sampling stations. As to seasonal variation, the highest average values of the total alga biomass (98.35-266.06 g m-2 DW) were registered during the rainy season, whereas lowest values (48.86-170.56 g m-2 DW) were in the dry season. P values varied from 23.8 to 225.2 mg m-2 and C from 139 to 353 mg m-2. During the rainy season, greatest air and water temperature, rain precipitation, turbidity and dissolved inorganic nitrogen values were measured, constituting the best conditions for charophyte growth. Water temperature and nutrient availability in the reservoir played a decisive role towards growth and accumulation of algal biomass.

Palynotaxonomy of Vernonanthura H. Rob. (Vernonieae, Asteraceae) species from Southeast Brazil

The present work studied the pollinic characteristics of 22 species of Vernonanthura from Southeast Brazil. The pollen grains were acetolysed, measured, described and ilustrated under light, scanning and transmission electron microscopy. Based on the results, Vernonanthura was considered an euripolinic genus as pollen grains presented distinctive characteristics, mainly related to the ornamentation, the size and apertures of the pollen grains, which may serve as a further tool in the delimitation of the species.

Figura della Asia

Julkaisussa: Il mondo e sue parti cioe Europa, Affrica, Asia et America

A map of Marco Polo's voyages & travels in the 13th century through a great part of Asia, all Tartary, the East India islands & part of Africa

Nimeketiedot nimiönkehyksissä

Septemtrionalium in Europa et Asia : terrarum descriptio, ad falsam veterum scriptorum mentem accomodata

Julkaisussa: Philippi Clüveri Germaniae antiqvae libri tres

Asia polyglotta : linguarum genealogiam, cum literis, scribendique modis, exhibens

Irtokartta

Asia, Aphrica, Europa

Julkaisussa: Cosmographicus liber Petri Apiani mathematici iam denuo integritati restitutus per Gemmam Phrysium

Asia Major

Julkaisussa: Itinerarium sacrae scripturae. - Vol. I

Noordoost cust van Asia van Japan tot Nova Zemla

Julkaisussa: L'Atlas de la mer, ou monde aquaticque

Asia poly-glotta : linguarum genealogiam, cum literis, scribendique modis, exhibens

Kartta kuuluu A. E. Nordenskiöldin kokoelmaan

Carte de l'Asie projettée stéreographiquement, tirée des rélations et observations, contenues dans les voyages modernes, de même que dans les monumens des anciens, corrigée de tout ce qui sent la fable, et divisée en ses IX parties méthodiques = Asia secundum legitimas projectionis stereographicae regulas et juxta recentissimas observationes, et relationes explosis aliorum fabulosis designationibus et narrationibus, adhibitis quoque veterum monumentis et recentiorum itinerariis descripta, et in partes suas methodicas IX divisa

Nimeke- ja tekijätiedot nimiönkehyksissä

Asia concinnata secundum observationes academiae regalis scientiarum et nonnullas alias, et juxta annotationes recentissimas

Nimeke- ja tekijätiedot nimiönkehyksissä

Al magnifico s. Francesco Scaridino non mi parea cosa conueniente ch'io lasciasa andar fuora : l'Europa, con sa qiuta [quita] del Africa, et parte del Asia senza ch'iosse segnassi nel fronte nome honorato si onde essa non fusse isprezzata ó ...

Kartta kuuluu A. E. Nordenskiöldin kokoelmaan

[Asia et Africa]

Kartta kuuluu A. E. Nordenskiöldin kokoelmaan