Wood growth response of Calluna vulgaris (L.) Hull to elevated N deposition and drought

Lageard, Jonathan G. A.; Wilson, D. R.; Cresswell, Neil; Cawley, L; Jones, Helen; Caporn, S. J. M.

doi:10.1016/j.dendro.2005.08.001

Cited by 11 publications

(9 citation statements)

References 9 publications

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“…These vegetation carbon concentration values are similar to others published in the literature for moorland vegetation: E. vaginatum e 43.5e45.3% (Thormann and Bayley,1997); Sphagnum capillifolium e 43.08 AE 0.13% (Vingiani et al, 2004); Sphagnum spp. e 46.6 AE 0.3% (Hall and Louis, 2004); C. vulgaris e 52e54% (Lageard et al, 2005).…”

Section: Field and Laboratory Resultsmentioning

confidence: 99%

“…Using this it is then possible to calculate an average biomass for stick (3) Biomass ¼ ðStick height Â 0:0265 À 0:9758Þ Â average stick density (3) where stick height is in mm and average stick density was 88 sticks m À2 . Using an average carbon concentration of C. vulgaris stems of w52% (Lageard et al, 2005) the carbon stock in the sticks could be calculated.…”

Section: Calculating Biomass and Carbon Stocksmentioning

confidence: 99%

See 1 more Smart Citation

Charcoal production in a UK moorland wildfire – How important is it?

Clay

Worrall

2011

Journal of Environmental Management

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Section: Field and Laboratory Resultsmentioning

confidence: 99%

Section: Calculating Biomass and Carbon Stocksmentioning

confidence: 99%

Charcoal production in a UK moorland wildfire – How important is it?

Clay

Worrall

2011

Journal of Environmental Management

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“…In many cases, the anatomical pattern of growth rings was consistent among species within each of the Caryophyllaceae, Lamiaceae, and Rosaceae. Moreover, dendrochronological techniques have successfully been applied to perennial herbs (Dietz and Schweingruber 2002) as well as to shrubs and dwarf shrubs (Gordon 1991;Milton et al 1997;Schweingruber and Dietz 2001a;Lageard et al 2005). Schweingruber and Poschlod (2005) conducted an extensive review of the maximum ages, age structure, and anatomy of 800 species of herbs and dwarf shrubs from Central Europe.…”

Section: Introductionmentioning

confidence: 99%

Allometric relationships and dendroecology of the dwarf shrubDryas integrifolianear Churchill, subarctic Manitoba

Tardif

2007

Can. J. Bot.

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Shrubs have generally been overlooked in dendrochronology, and little information exists on allometric relationships in dwarf shrubs. Dryas integrifolia M. Vahl. has been recognized as an important species in revegetation of disturbed gravel pits in northern areas. In this study, the dimensions (mat, stem, and root) of D. integrifolia shrubs were measured in four populations having recolonized disturbed areas, and anatomical slides containing growth rings were prepared for each individual. The first objective was to compare allometric relationships among descriptors of shrub dimension and between these descriptors and shrub age. Secondary objectives included documenting maximum age and evaluation of the potential for cross-dating among shrubs. Strong, consistent allometric relationships between aboveground dimensions were observed among individuals from all sites, although growth rates varied within and between sites. This indicated that even though aboveground shrub dimensions grow proportionally to one another, these measurements cannot be used to infer age, because of differences in growth rates among D. integrifolia shrubs. However, numerous cross-sections from D. integrifolia shrubs could be successfully cross-dated, and a short chronology was developed. The radial growth -climate association was found to be similar to that of dominant tree species of the region regarding the impact of October conditions. Increased snowfall in October prior to and warm May temperature during the year of ring formation appear to restrict growth of these shrubs by altering the onset of the growing season. This study has demonstrated that it is possible to accurately date D. integrifolia shrubs, and this ability may be applied to future studies involving population dynamics and remediation of open gravel sites. Growth rings also have the potential to be used in other Arctic shrubs.Résumé : On a généralement négligé les arbustes en dendrochronologie, et il y a peu d'information sur les relations allométriques chez les arbrisseaux. On reconnaît le Dryas integrifolia M. Vahl. comme espèce importante pour la restauration des bancs de gravier perturbés, dans les régions nordiques. Les auteurs ont mesuré les dimensions (matte, tige, racine) d'individus du D. integrifolia, dans quatre populations ayant recolonisé des surfaces perturbées, et ils ont préparé des lames anatomiques portant des anneaux de croissance de chaque individu. On cherchait d'abord à comparer les relations allométriques entre les données sur la dimension de l'arbuste, et entre ces données et l'âge de l'arbuste. On cherchait de plus à déterminer l'âge maximum et à évaluer le potentiel pour obtenir des superpositions d'âges entre les arbrisseaux. Les auteurs ont observé des relations robustes et congrues entre les dimensions épigées, parmi les individus de tous les sites, bien que les taux de croissance varient sur et entre les sites. Conséquemment, même si les dimensions épigées des arbustes s'accroissent proportionnellement les unes par rapport aux autres, ces mesu...

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“…However, we doubt that this is a correct explanation, because shady rock can be rich in nitrogen in the vicinity of dens and also trees with bark furrows naturally occur at nutrientrich sites. Nevertheless, the decline of terricolous lichens due to nitrogen pollution is probable, as the latter leads to increased vascular-plant biomass (Lageard et al 2005;Johnson et al 2008). If physiologically possible it is very likely that at least one species would have evolved, which would have been able to fill this ecological niche.…”

Section: Discussionmentioning

confidence: 99%

Preference of lichens for shady habitats is correlated with intolerance to high nitrogen levels

Hauck

Wirth

2010

The Lichenologist

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Based on findings in vascular plants showing that the capacity to provide enough carbon skeletons for rapid ammonium assimilation into amino acids is a prerequisite for tolerance to eutrophication, we tested the hypothesis that lichens from shady habitats are particularly sensitive to nitrogen pollution. We tested this hypothesis using published ecological indicator values (estimates of eutrophication tolerance and light preferences on an ordinal scale) for more than 500 central European lichen species. Our results show that shade-adapted lichens are indeed at the same time intolerant to eutrophication. However, not all eutrophication-sensitive lichens inhabit shady environments, suggesting the existence of several independent mechanisms causing intolerance of high nitrogen levels in lichens. The correlation of shade adaptation with nitrogen intolerance is limited to epiphytic and saxicolous species, since terricolous lichens are out-competed by vascular plants in dense vegetation. Our results suggest that lichen communities of shady bark, wood and rock are particularly sensitive to eutrophication.

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Wood growth response of Calluna vulgaris (L.) Hull to elevated N deposition and drought

Cited by 11 publications

References 9 publications

Charcoal production in a UK moorland wildfire – How important is it?

Charcoal production in a UK moorland wildfire – How important is it?

Allometric relationships and dendroecology of the dwarf shrubDryas integrifolianear Churchill, subarctic Manitoba

Preference of lichens for shady habitats is correlated with intolerance to high nitrogen levels

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