Effects of acidic rain and ozone on nitrogen fixation and photosynthesis in the lichen Lobaria pulmonaria (L.) Hoffm.

Sigal, Lorene L.; Johnston, John W.

doi:10.1016/0098-8472(86)90053-5

Cited by 37 publications

(15 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…at pH 2 (HgSOJ, but no efFect at pH 4 or higher. Similarly, Sigal & Johnston (1986) found complete inhibition of photosynthesis of L. pulmonaria at pH 2-6 (H,SO, and HNO3) but no effect at pH 4 2 and bigber. Englund (1978) found that at pH 4, nitrogenase activity of excised cephalodia from Peltigera aphthosa (L.) Willd.…”

Section: Introductionmentioning

confidence: 99%

Effects of simulated nitrogen rich and acid rain on the nitrogen‐fixing lichen Peltigera aphthosa (L.) Willd.

Hallingbäck

Kellner

1992

New Phytologist

View full text Add to dashboard Cite

summary The nitrogen‐fixing lichen Pettigera aphthosa (L.) Willd. was treated under semi‐natural conditions with simulated rain containing different combinations of ammonium, nitrate and sulphuric acid. Nitrogen in neutral solution had no negative effect on the nitrogen fixation rate. Sulphuric acid had a negative effect on nitrogen fixation rate, especially in combination with ammonium. The results could suggest an explanation for the sudden decline of P. aphthosa in southern Sweden.

show abstract

Section: Introductionmentioning

confidence: 99%

Effects of simulated nitrogen rich and acid rain on the nitrogen‐fixing lichen Peltigera aphthosa (L.) Willd.

Hallingbäck

Kellner

1992

New Phytologist

View full text Add to dashboard Cite

show abstract

“…Significant reductions in nitrogenase activity in response to simulated acid rain, especially when containing sulphuric acid, have been demonstrated for nitrogen-fixing lichens (Denison et al, I'^ll;Fntz-Sheridan, 1985;Sigal & Johnston, 1986;Hallmgback & Kellner, 1992;Kytoviita, 1993), and these species are thought to be particularly susceptible to acid rain. This suggestion is supported by the relatively rapid reduction in the cyanobacterial lichen flora of areas suffering increased acid deposition (e.g.…”

Section: Effects On the Bottom Layer Vegetationmentioning

confidence: 99%

Responses of ground vegetation to prolonged simulated acid rain in sub‐arctic pine—birch forest

Shevtsova

Neuvonen

1997

New Phytologist

View full text Add to dashboard Cite

S U M M A R YThe efiects of prolonged simulated acid rain on percentage cover of ground vegetation, and on growth and reproduction of two dominating dwarf shrubs {Empetrum nigrum and Vaccinium vitis-idaea) were examined in a field experiment in the Finnish Subarctic, in an area with low ambient levels of sulphur and nitrogen deposition. Acid rain treatments included moderate (pH 3'8) and high (pH 2-9) concentrations of either H,SO^, or HNO3, or a mixture of them, and were compared with irrigated (pH 6) and dry control plots.Long-term application of acid rain caused significant alteration in the cover and composition of ground vegetation. Effects of acid rain depended on the accompanying anion and on pH. Sub-plots under different canopy tree species differed in responses indicating that spatial heterogeneity is important in predicting the effect of acidifying pollution on this plant community.In the bottom layer, acid rain caused significant reduction in cover of the cyanobacterial lichens Aephroma arcticuw and Peltigera spp. Decrease in cover of fruticose lichens, mainly composed of Cladina spp., more likely resulted from additional watering.In the field layer, acid rain containing moderate concentrations of NO.," caused an increase in cover of graminoid species. There were only slight alterations in growth and cover of the two dominant evergreen dwarf shrubs, E. nigrum and V. vitis-idaea, indicating that these species are tolerant to acid rain of as low as pH 3. Even some positive responses of dwarf shrubs were observed, depending on canopy tree. Application of acid rain of pH 3 to plots under pine trees caused an increase in cover of V. vitis-idaea and, when the nitric acid only was applied, a short-term increase in the number of new shoots of E. nigrum.In contrast to vegetative growth, reproduction of the dwarf shrubs was more strongly affected by acid ram, but this also depended on local conditions and anion composition of acid rain. On 'pine' plots, rain of pH 3 reduced the number of berries and flower buds on terminal current shoot of E. nigrum, however, this was partially compensated by an increase in berr\' production at the ramet level. Simulated acid rain had mainly negati\-e effects on berry production by V. vitis-idaea.

show abstract

“…Because L. pulmonana is sensitive to acidic air pollution and ozone (Sigal & Johnston 1986;Scheidegger & Schroeter 1995), air pollution may regionally be a major cause for the decline in Lobaria populations. Furthermore, L. pulmonana has been found to be dependent on a high ecological continuity of its habitats and the longevity of its phorophytes (Rose 1976).…”

Section: Introductionmentioning

confidence: 99%

Early Development of Transplanted Isidioid Soredia of Lobaria Pulmonaria in an Endangered Population

Scheidegger

1995

LIC

View full text Add to dashboard Cite

Vegetative diaspores of Lobaria pulmonaria were transplanted to previously uncolonized trees. The early development of the corticated but otherwise non-stratified isidioid soredia was studied mainly by low-temperature scanning electron microscopy. Anchoring hyphae developed from cortical hyphae after 2-4 months and later apical or lateral pseudomeristematic growth zones were formed. After 15 months the growth zones further differentiated into 0-5-mm-broad lobes and revealed a stratified thallus typical for this foliose epiphytic lichen species. The experiment showed that the small population size of L. pulmonaria was limited by the low reproductive potential of the species and that it might fail to compensate for a relatively high disturbance, natural or anthropogenic, in the stand.U 1995 The British Lichen Society

show abstract

Effects of acidic rain and ozone on nitrogen fixation and photosynthesis in the lichen Lobaria pulmonaria (L.) Hoffm.

Cited by 37 publications

References 16 publications

Effects of simulated nitrogen rich and acid rain on the nitrogen‐fixing lichen Peltigera aphthosa (L.) Willd.

Effects of simulated nitrogen rich and acid rain on the nitrogen‐fixing lichen Peltigera aphthosa (L.) Willd.

Responses of ground vegetation to prolonged simulated acid rain in sub‐arctic pine—birch forest

Early Development of Transplanted Isidioid Soredia of Lobaria Pulmonaria in an Endangered Population

Contact Info

Product

Resources

About