Brachythecium

Mosses and lichens accumulate nickel readily and at least nine species are used to monitor environmental gradients of nickel (Jenkins 1980a). Maximum concentrations of nickel found in whole lichens and mosses from nickel-contaminated areas range between 420 and 900 mg/kg DW vs. 12 mg/kg DW from reference sites (Jenkins 1980a). Nickel concentrations in herbarium mosses worldwide have increased dramatically during this century. In one case, nickel concentrations in Brachythecium salebrosum from Montreal, Canada, rose from 6 mg/kg DW in 1905 to 105 mg/kg DW in 1971 (Richardson etal. 1980). 

Bates, J.W. (1994) Responses of the mosses Brachythecium rutabulum and Pseudoscle-ropodium purum to a mineral nutrient pulse. Eunctional Ecology 8, 686-692. 

FIGURE 6.3 The secondary structure of the tmL intron of Brachythecium cirmsum and secondary structures of P8 regions of Oxyrrhynchium Mans and Donrichardsia macroneuron. Numbers indicate positions in POY alignment where substitutions/indels occur (see supplemental CD). 

The genera of Brachytheciaceae are quite diverse with respect to the level of substitution/indel events within the tmL intron (Appendices 6.1 and 6.2). Very few (0 to 3) substitution/indel events are observed in all members of the Homalothecioideae, most members of the Brachythecioideae (with the exception of Sciuro-hypmm and four species closely related to Brachythecium salebrosum, which have a long insertion), as well as basal groups of the Helicodontioideae (Squamidium clade),... 

Brachythecium novae-angliae (Sull. Lesq.) A. Jaeger AF397843 DQ336899 AF403665 China, Hunan Prov., T. Koponen, S. Huttunen P.-C. Rao 52900, 11. Oct. 1997 (H)... 

Brachythecium percurrens Hedenas — AY737469 AY737469 (Sequences from GenBank, Vanderpoorten et al., 2005)... 

Brachythecium rivulare Bruch et al. AF397866 DQ200076 AF403651 Finland, A. Pamela, 19. May 1996 (H)... 

Brachythecium rivulare Bruch et al. — DQ200077 DQ200977 Germany, J.-P. Frahm, 29. June 1999 (BONN)... 

Brachythecium rutahulum (Hedw.) Bruch et al. AF397867 DQ200078 AF403644 Finland, S. Huttunen 1415, 16. April 2000 (H)... 

Wigh, K. (1975) Scandinavian species of the genus Brachythecium (Bryophyta). I. Modification and biometric studies in the B. rutabulum-B. rivulare complex. Botaniska Notiser, 128 463-475. 

Brachythecium rutabulum (Hedw.) Schimp. AF023818 DQ463107 N142 Bell 911 BM... 

Exceptions are the placement of Rhytidiadelphus sister (node 95) to the family Brachytheciaceae, represented by the exemplars of Brachythecium and Eurhyncium (node 96) and the three pairs of genera, Pilosium and Stereophyllum (node 94) Entodon and Thuidium (node 97) and Jaegerina and Orthostichopsis (node 98). In each case, these groups or pairs of exemplars belong to taxa that are sufficiently well known for these dated nodes to be placed in context. 

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