964 resultados para LAMINA PROPRIA


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Physiognomic traits of plant leaves such as size, shape or margin are decisively affected by the prevailing environmental conditions of the plant habitat. On the other hand, if a relationship between environment and leaf physiognomy can be shown to exist, vegetation represents a proxy for environmental conditions. This study investigates the relationship between physiognomic traits of leaves from European hardwood vegetation and environmental parameters in order to create a calibration dataset based on high resolution grid cell data. The leaf data are obtained from synthetic chorologic floras, the environmental data comprise climatic and ecologic data. The high resolution of the data allows for a detailed analysis of the spatial dependencies between the investigated parameters. The comparison of environmental parameters and leaf physiognomic characters reveals a clear correlation between temperature related parameters (e.g. mean annual temperature or ground frost frequency) and the expression of leaf characters (e.g. the type of leaf margin or the base of the lamina). Precipitation related parameters (e.g. mean annual precipitation), however, show no correlation with the leaf physiognomic composition of the vegetation. On the basis of these results, transfer functions for several environmental parameters are calculated from the leaf physiognomic composition of the extant vegetation. In a next step, a cluster analysis is applied to the dataset in order to identify "leaf physiognomic communities". Several of these are distinguished, characterised and subsequently used for vegetation classification. Concerning the leaf physiognomic diversity there are precise differences between each of these "leaf physiognomic classes". There is a clear increase of leaf physiognomic diversity with increasing variability of the environmental parameters: Northern vegetation types are characterised by a more or less homogeneous leaf physiognomic composition whereas southern vegetation types like the Mediterranean vegetation show a considerable higher leaf physiognomic diversity. Finally, the transfer functions are used to estimate palaeo-environmental parameters of three fossil European leaf assemblages from Late Oligocene and Middle Miocene. The results are compared with results obtained from other palaeo-environmental reconstructing methods. The estimates based on a direct linear ordination seem to be the most realistic ones, as they are highly consistent with the Coexistence Approach.

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Contiene: Osservazioni e sperienze intorno al nuovo metodo di curare la tisi polmonale proposto dal Sig. Beddoes coll'aggiunta della descrizione d'una nuova macchina ... inventata dal sig. Cristoforo Girtanner ... ; Riflessioni sull'uso delle arie artificiali inspirate nelle malattie di petto di W. Hufeland.

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Officia propria sanctorum Archidioecesis Caesaragustanae, p. 448

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Mode of access: Internet.

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Mode of access: Internet.

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Contiene: Libro tercero: Viages desde el puerto del Callao a Europa... - Indice general de las cosas notables contenidas en esta segunda parte del viage a los reynos del Perú. - Resumen historico del origen y sucession de los incas y demas soberanos del Perú con noticias de los sucessos mas notables en el reynado de cada uno. - Indice de las cosas mas notables contenidas en este resumen.

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Contiene: Tabla de los libros y capitulos, parte II. - Erratas. - Segunda parte del viage al reyno del Perú con el fin de averiguar el valor de los grados terrestres del meridiano... - Libro Primero: trata de nuestro viage a Lima... - Libro segundo: Regreso de Lima a Quito...viage hecho a Guayaquil para poner en resguardo aquella ciudad contra la invasion que se temio de la escuadra inglesa comandada por el Vice-Almirante Anson, segundo viage a Lima y de alli a las islas de Juan Fernandez y costas de Chile...

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Contiene según consta en la portada: Brevis christianae ac Catholicae fidei defensio, et Iudaeorum, Mahumetanorum, atque Haereticorum oppugnatio. - De ratione habendi Concilia Prouincialia ac Diocesana, et de iis quae in ipsis praecipue sunt tractanda. - Isidori ordo de celerando Concilio. - De variis Collegiis ad utilitatem publicam constituendis.

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Vols. 10-18 each contain both chronological and alphabetical indexes. Vol. 18 contains also a general index to the Correspondence, v. 10-18. Vol. 20 contains indexes to the complete work: Indice dei volumi: Indice dei facsimili Indice dei nomi e delle cose notabili--Indice biografico.

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Has facsimile of the original ms. t.-p., reading: Caroli Linnæi M.B. & Z.C.S.R. Hortus Uplandicus. Sive Enumeratio Stirpium quæ in variis Hortis Uplandiæ imprimis autem in H. Botanico Publico Upsaliensi coluntur nec non qua' in agris faventur; Methodo propria [?] in classes distributa ... Upsal: MDCCXXX.

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Vol. 16 includes general index (p. [361]-366)