The reduction of aboveground Calamagrostis epigeios mass and tiller number by enhanced UV-B in a dune-grassland ecosystem

Oudejans, A.M.C.; Nijssen, A.; Huls, J. S.; Rozema, J.

doi:10.1007/978-94-017-2892-8_4

Cited by 4 publications

(5 citation statements)

References 57 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Our results show that plant biomass was unaffected by simulated ozone depletion 7 years after onset of treatments. This is in accordance with several other community studies in which UV‐B generally did not affect biomass (Norton et al , 1999), although Oudejans et al (2001) reported a UV‐B‐mediated reduction in aboveground biomass of Calamagrostis epigeios in a dune grassland.…”

Section: Discussionmentioning

confidence: 99%

Physical disturbance of an upland grassland influences the impact of elevated UV‐B radiation on metabolic profiles of below‐ground micro‐organisms

Avery

Thorpe

Thompson

et al. 2004

Global Change Biology

View full text Add to dashboard Cite

This investigation determined the response of soil microbial communities to enhanced UV-B radiation and disturbance in upland grassland. A factorial field experiment encompassing two levels of UV-B supplementation (simulating ambient and a 30% increase in stratospheric ozone) and two levels of disturbance (disturbed and undisturbed) was established at Buxton Climate Change Impacts Laboratory, Derbyshire, UK, and maintained for 7 years prior to sampling.Enhanced UV-B increased microbial utilization of carbohydrates, carboxylic acids, polymers and aromatic compounds present in Biologs GN plates when inoculated with soils taken from disturbed plots, but did not affect carbon utilization of soil microbial communities associated with undisturbed plots (UV-B Â Disturbance interaction, Po0.05 for each substrate type).UV-B treatment did not affect numbers of bacteria or fungi. Direct microscopic counts showed fewer bacteria in soil originating from disturbed plots than from undisturbed plots (Disturbance, Po0.001), although a greater number of culturable bacteria and fungi were isolated from disturbed than from undisturbed soils (Disturbance, Po0.001). No UV-B-or disturbance-related differences in protein, starch or urea hydrolysis were exhibited by bacterial isolates.UV-B treatment did not affect total plant biomass within undisturbed plots or the biomass of individual groupings of grasses, forbs and mosses. Per cent root length colonized by arbuscular mycorrhizal fungi (AMF) was not affected by enhanced UV-B radiation in the undisturbed plots. Neither AMF nor plant biomass was measured in disturbed plots.The key findings of this study show that UV-B-mediated alterations in carbon utilization occurred in soil microbial communities subjected to disturbance, but such changes were not observed in communities sampled from undisturbed grassland. Differences in the catabolic potential of microbial communities from disturbed grassland subjected to enhanced UV-B are probably related to plant-mediated changes in resource availability or quality.

show abstract

Section: Discussionmentioning

confidence: 99%

Physical disturbance of an upland grassland influences the impact of elevated UV‐B radiation on metabolic profiles of below‐ground micro‐organisms

Avery

Thorpe

Thompson

et al. 2004

Global Change Biology

View full text Add to dashboard Cite

show abstract

“…In 1996, a long‐term study into the effects of UV‐B radiation on a dune grassland ecosystem started at this site. A more elaborate description of the study site and the experimental set‐up in the field can be found in Rozema et al (1999) and Oudejans et al (2001).…”

Section: Methodsmentioning

confidence: 99%

Elevated UV‐B radiation has no effect on litter quality and decomposition of two dune grassland species: evidence from a long‐term field experiment

Hoorens

Aerts

Stroetenga

2004

Global Change Biology

View full text Add to dashboard Cite

From studies on living plant tissues it has been inferred that elevated UV-B radiation could negatively affect litter quality and subsequent decomposition. However, in general, the effects of UV-B radiation on litter chemistry and decomposition reported in the literature are variable and are often only marginally (if at all) significant. This might be due to the ecologically unrealistic conditions under which these experiments were performed.We investigated the effects of elevated UV-B radiation on litter quality and subsequent decomposition on initial litter chemistry and long-term (2 years) decomposition of freshly senesced Carex arenaria and Calamagrostis epigejos leaf litter under ecologically realistic conditions. This material was collected from a dune grassland that had received UV-B radiation treatments for three growing seasons. It was then used in a 2-year decomposition study using litter bags.We found no significant effects of elevated UV-B radiation on any of the litter chemistry parameters in either of the two species, nor did we find significant effects on litter decomposition. However, we did find significant differences in litter decomposition between the species. These differences were related to the interspecific differences in litter chemistry, particularly the litter phenolics concentration. These results show that litter quality and decomposition in dune grasslands are, also under ecologically realistic conditions, not affected by UV-B radiation. Instead, litter decomposition is determined by constitutive interspecific differences in litter chemistry.In conclusion, with our results added to the already existing literature, the preponderance of evidence now clearly suggests that elevated UV-B radiation has very little, if any, impact on litter quality and subsequent decomposition in real ecosystems.

show abstract

“…However, these positive short-term effects could diminish over the long-term treatments (Teramura et al 1990). A significant reduction due to UV-B supplementation in number of tillers and total above-ground dry mass per soil area unit was also found for C. epigejos (Oudejans et al 2001).…”

Section: Biomassmentioning

confidence: 86%

“…in response to enhanced UV-B radiation is contradictory. Oudejans et al (2001) underline a reduction of Calamagrostis epigejos aboveground portion in a dune system (i.e. leaf mass and surface and tiller number) in response to enhanced UV-B, whereas Tosserams and Rozema (1995) show increased total biomass of the same species related to leaf anatomical changes.…”

Section: Introductionmentioning

confidence: 96%

Photosynthesis and growth response of Calamagrostis arundinacea and C. villosa to enhanced UV-B radiation

et al. 2006

View full text Add to dashboard Cite

Calamagrostis arundinacea L. (Roth.) and C. villosa (Chaix.) J.F. Gmel are two grass species substituting forest communities on deforested areas in Central Europe. They were exposed to enhanced ultraviolet-B (UV-B, λ = 290-320 nm) radiation during 22 weeks. A system of modulated lamps operating under field conditions was used to simulate a 25 % increase of incident UV-B radiation. CO 2 assimilation seemed to be limited by a decrease of stomatal conductance (g s ) in C. arundinacea, whereas carboxylation activity of ribulose-1,5-bisphosphate carboxylase/oxygenase (RuBPCO) was not affected. On the contrary, g s and RuBPCO activity decreased in C. villosa. These physiological adjustments resulted in growth changes; above-ground biomass decreased in C. villosa (prevailing negative effect) and significantly increased in C. arundinacea (prevailing positive effect) in response to enhanced UV-B radiation.

show abstract

The reduction of aboveground Calamagrostis epigeios mass and tiller number by enhanced UV-B in a dune-grassland ecosystem

Cited by 4 publications

References 57 publications

Physical disturbance of an upland grassland influences the impact of elevated UV‐B radiation on metabolic profiles of below‐ground micro‐organisms

Physical disturbance of an upland grassland influences the impact of elevated UV‐B radiation on metabolic profiles of below‐ground micro‐organisms

Elevated UV‐B radiation has no effect on litter quality and decomposition of two dune grassland species: evidence from a long‐term field experiment

Photosynthesis and growth response of Calamagrostis arundinacea and C. villosa to enhanced UV-B radiation

Contact Info

Product

Resources

About