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The Sphagnum subsecundum complex (Sphagnaceae): morphological variability...
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The Sphagnum subsecundum complex (Sphagnaceae): morphological variability and taxonomic implications

Dane szczegółowe:
Wydawca: Wydawnictwo Naukowe UAM
Rok wyd.: 2008
Oprawa: miękka
Ilość stron: 225 s.
Wymiar: 175 x 240 mm
EAN: 9788323219507
ISSN: 0554-81IX
Data: 2009-09-25
Cena wydawcy: 34.60 złpozycja niedostępna

The Sphagnum subsecundum complex (Sphagnaceae): morphological variability... - opis wydawcy:

The aims of the study were to: (1) provide a description of morphological entities, their distribution and a set of diagnostic characters within the so-called Sphagnum subsecundum complex (Sphagnaceae) originated mainly from Europe and North America using classical taxonomic tools; (2) test of usefulness of morphological characteristics in the proper identification of distinguished morphological entities by applying quantitative analysis; (3) detect the influence of environmental conditions and natural hybridization upon the morphology of some analyzed taxa. A reassessment of herbarium materials reveals that: (1) morphospecies in the complex, consi-dered as widespread, as well as eight new informally described morphs, demonstrated a complex pattern of geographical differentiation, i.e. areas of endemism; (2) geographically separated popula-tions have similar morphological characteristics and similar morphologies occur within the uni- and bistratose species. A mechanism called adaptive phenotypic accommodation has been proposed to explain the origin and yariability of morphologica! traits in the complex. There is an urgent need for morę research studies to enhance the current state of knowledge of Spliagmtm before finał classification of the Sphagnum subsecundum complex will be made. Key words: Sphagnaceae; Sphagnum subsecundum complex; morphological variability; adaptive phenotypic accommodation; distribution

Spis treści:

PART ONE

Potential causes of morphological variability within the Sphagnum subsecundum complex

Chapter 1. Morphological variability of Sphagnum subsecundum Nees and S. inun-datum Russ. defined on the basis of multienzyme phenotypes, cytological characters, and ctDNA sequences

Chapter 2. Broad phenotypic plasticity and adaptive fixity in peat mosses - the case of Sphagnum denticulatum Brid

PART TWO

Morphological differentiation patterns of the Sphagnum subsecundum complex and usefulness of morphological characteristics based on anayses of herbarium specimens

Chapter 3. A new contribution of classic morphology to resolving the Sphagnum subsecundum complex on the basis of specimens from Europe, eastern North America, and other regions

Chapter 4. Testing statistical significance of geographical variation in morphological patterns within Sphagnum subsecundum complex

General conclusions and summary of results

Annex

Kompleks Sphagnum subsecundum (Spagnaceae): morfologiczna zmienność i taksonomiczne implikacje (Streszczenie)

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