Differential Evolutionary Activity in Bryophytes

Khanna, K. R.

doi:10.2307/2406218

Cited by 11 publications

(7 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Their phylogeny has attracted interest over a long period of time (Bower 1935;Campbell 1905;Campbell 1971;Haskell 1949;Khanna 1965;Miller 1974Miller , 1982Schofield 1985). This interest stems from the fact that they appear to be the most basal lineages among extant land plants, and because of the fundamental diversity among the major groups of bryophytes, which has called into question the monophyly of the bryophytes or even of the land plants (i.e., embryophytes; see Crandall-Stotler 1980, 1984Duckett & Renzaglia 1988).…”

mentioning

confidence: 99%

A Molecular Approach to the Phylogeny of Bryophytes: Cladistic Analysis of Chloroplast-Encoded 16S and 23S Ribosomal RNA Genes

Mishler¹,

Thrall²,

Hopple³

et al. 1992

The Bryologist

View full text Add to dashboard Cite

show abstract

mentioning

confidence: 99%

A Molecular Approach to the Phylogeny of Bryophytes: Cladistic Analysis of Chloroplast-Encoded 16S and 23S Ribosomal RNA Genes

Mishler¹,

Thrall²,

Hopple³

et al. 1992

The Bryologist

View full text Add to dashboard Cite

show abstract

“…The thickest and most absorptive bark is found at tree bases, which promotes development of bryophyte communities near the ground (Billings & Drew 1938;Forman 1998;Hale 1952). In this study, mosses were largely restricted to the first meter above the forest floor where minimum and 24 hour mean VPDs were lowest (Table 2b), and there is a layer of still, nonturbulent air (Khanna 1964). Evaporation rate increases with height on tree trunks (Pitkin 1975), and there can be a steep gradient of decreasing bark moisture content at tree bases, with several times less moisture at 2 m than below 1 m (Billings & Drew 1938).…”

Section: Discussionmentioning

confidence: 61%

Structure and composition of corticolous epiphyte communities in a Sierra Nevada old-growth mixed-conifer forest

Rambo

2010

The Bryologist

View full text Add to dashboard Cite

“…As well, some species in every major group appear to disperse poorly, so scattered residues can act as stepping stones to recolonization of favoured sites. Limited dispersal has been reported among insects (Jonsson 2003;Ranius and Hedin 2001) and byrophytes (Khanna 1964;Hylander 2009;Söderström 1987;Söderström and Jonsson 1989), and is inferred for lichens (Hilmo and Ott 2002). Abundance of truffles and truffle-like fungi is related to the amount of forest floor covered by logs (Amaranthus et al 1994;Carey and Johnson 1995).…”

Section: Down Wood Within Standsmentioning

confidence: 99%

“…We know little about the dispersal of most species relying on down wood as substrate, other than some species disperse poorly and others disperse far better (Dettki et al 2000;Grove 2002;Hansson et al 1992;Khanna 1964;Pharo and Zartman 2007;Söderström 1987). Poorly dispersing species will be less well accommodated when most down wood is removed from the site or piled.…”

Section: Patterns In Use Of Down Woodmentioning

confidence: 99%

Down wood and biodiversity — implications to forest practices

2010

View full text Add to dashboard Cite

Many species require or use down wood (fine and coarse woody debris) as habitat. Where forestry has been practiced for several rotations large proportions of these species are considered threatened. Key attributes determining the suitability of down wood as habitat are decay stage, tree species, and size, specifically diameter. Both quantity and distribution of suitable down wood influence species' presence and abundance. We present a simple framework describing use of down wood based on broad natural history features, derive predictions from the framework, then test these by review and summary of literature. Our focus is terrestrial vertebrates, particularly in the Pacific Northwest. Species other than vertebrates are addressed to ensure that metrics derived for vertebrates also are appropriate for other organisms. Basic metrics are the same, but appropriate values span a larger range among nonvertebrates. Current evidence suggests that the ''extinction debt'' apparent for nonvertebrates is approaching for vertebrates. Predictions derived from underlying natural history hold when tested. From that basis we derive broad guidelines for forest planning and practice, and suggest how regional target values can be derived. Résumé :Plusieurs espèces nécessitent ou utilisent le bois mort (débris ligneux fins ou grossiers) comme habitat. Là où l'on a pratiqué la foresterie au cours de plusieurs rotations, on considère qu'une large proportion de ces espèces deviennent menacées. Les caractéristiques déterminant l'utilité du bois mort comme habitat regroupent l'état de décomposition, les espèces d'arbres et leurs dimensions, surtout le diamètre. Les quantités ainsi que la distribution de bois mort adéquat influencent la présence des espèces et leur abondance. Les auteurs présentent un cadre de travail simple décrivant l'utilisation du bois mort, basé sur des caractéristiques élargies d'histoire naturelle, déduisent des prédictions à partir d'un tel cadre, et les vérifient finalement par une revue et un résumé de la littérature. On met l'accent sur les vertébrés terrestres, particulière-ment de la région du Pacifique nord-ouest. On considère également d'autres espèces que des vertébrés, afin de s'assurer que les chiffres inférés pour les vertébrés sont également appropriés pour d'autres organismes. Les mesures de base restent les mêmes, mais les valeurs pertinentes couvrent un plus large spectre parmi les non-vertébrés. La preuve actuelle suggère que la « dette d'extinction » apparente pour les non-vertébrés approche celle des vertébrés. Les prédictions dérivées de l'histoire naturelle sous-jacente supportent la mise à l'épreuve. Sur cette base, les auteurs déduisent des directives larges pour la planification et la pratique forestière et suggèrent comment on peut en déduire des valeurs cible à l'échelle régio-nale.

show abstract

Differential Evolutionary Activity in Bryophytes

Cited by 11 publications

References 0 publications

A Molecular Approach to the Phylogeny of Bryophytes: Cladistic Analysis of Chloroplast-Encoded 16S and 23S Ribosomal RNA Genes

A Molecular Approach to the Phylogeny of Bryophytes: Cladistic Analysis of Chloroplast-Encoded 16S and 23S Ribosomal RNA Genes

Structure and composition of corticolous epiphyte communities in a Sierra Nevada old-growth mixed-conifer forest

Down wood and biodiversity — implications to forest practices

Contact Info

Product

Resources

About