摘要:

AbstractThe decomposition of Calliergonella cuspidata material in litterbags was followed for a period of 2½years on a north- and a south-facing chalk grassland in South Limburg (The Netherlands). Measurements were made of the dry weight and of the nitrogen, phosphorus and potassium content of the bryophyte material During the first month almost half of the N and P leached out. Later the total amount of N and P in the material increased again. Loss of dry weight was faster on the north-facing slope than on the south-facing slope. On the north-facing slope the biomass decreased by almost 50% during the observation period. In these experiments decomposition does not appear to depend on season. However, it may be expected that in the field leaching of nutrients from the bryophyte layer will happen mainly in summer and will supply significant amounts of nutrients to the system.

ISSN:0373-6687    

DOI:10.1179/jbr.1988.15.2.343

出版商:Taylor&Francis    

年代:1988

数据来源: Taylor

摘要:

AbstractAn investigation was carried out on the distribution of a‘copper moss’Scopelophila cataractae(Mitt.) Broth in Japan, followed by a semi-quantitative survey of elements present in samples collected using energy-dispersive X-ray fluorescence spectrometry (EDXRF). On the basis of this survey, quantitative studies on the concentrations of Cu and 15 other elements (Na, Mg, AI, P, K, Ca, Ti, V, Cr, Mn, Fe, Co, Ni, Zn, Pb) in the copper-rich samples were carried out using inductively coupled plasma atomic emission spectrometry (ICP-AES). Localization of Cu in the cells was also investigated using scanning and transmission electron microscopy with X-ray microanalysis (SEM-XMA, Cryo-SEM-XMA and TEM-XMA).S. cataractaeis able to grow in various copper-rich environments. The concentration of Cu in the shoots attained a level as high as 1–3% although the concentration of Cu in rain water carrying Cu from cooper artifacts toS. cataractaecolonies was in the order of ppm. The cell wall was found to be a particularly important site of Cu accumulation in comparison with other cell components.

ISSN:0373-6687    

DOI:10.1179/jbr.1988.15.2.353

出版商:Taylor&Francis    

年代:1988

数据来源: Taylor

ISSN:0373-6687    

DOI:10.1179/jbr.1988.15.2.377

出版商:Taylor&Francis    

年代:1988

数据来源: Taylor

ISSN:0373-6687    

DOI:10.1179/jbr.1988.15.2.493

出版商:Taylor&Francis    

年代:1988

数据来源: Taylor

ISSN:0373-6687    

DOI:10.1179/jbr.1988.15.2.495

出版商:Taylor&Francis    

年代:1988

数据来源: Taylor

ISSN:0373-6687    

DOI:10.1179/jbr.1988.15.2.496

出版商:Taylor&Francis    

年代:1988

数据来源: Taylor

ISSN:0373-6687    

DOI:10.1179/jbr.1988.15.2.497

出版商:Taylor&Francis    

年代:1988

数据来源: Taylor

ISSN:0373-6687    

DOI:10.1179/jbr.1988.15.2.499

出版商:Taylor&Francis    

年代:1988

数据来源: Taylor

ISSN:0373-6687    

DOI:10.1179/jbr.1988.15.2.503

出版商:Taylor&Francis    

年代:1988

数据来源: Taylor

ISSN:0373-6687    

DOI:10.1179/jbr.1988.15.2.ii

出版商:Taylor&Francis    

年代:1988

数据来源: Taylor