Population Ecology

Cornelius, R.; Faensen-Thiebes, Andreas

doi:10.1007/978-3-642-75154-7_20

Cited by 2 publications

(4 citation statements)

References 140 publications

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“…Visible symptoms are often used to indicate response to acute ozone stress. In early screening experiments, wild plants were exposed to ozone concentrations of 150-250 ppb for 2 or 5 h (Cornelius et al, 1985 ;Ashmore et al, 1987) and a wide range of different injury symptoms were observed. Nebel & Fuhrer (1994) exposed a number of species from grassland communities to ozone concentrations, using a more realistic ozone-exposure profile in closed fumigation chambers, and often found necrotic flecking of the upper leaf surface as a typical symptom of leaf injury.…”

Section: mentioning

confidence: 99%

“…If a cumulative ozone responsiveness is typical for D. carota and T. vulgare, this would explain why short-term studies even with higher ozone concentrations (e.g. Cornelius et al, 1985) failed to induce visible symptoms in these two species. Although the direct relationship between sensitivity to short-term and long-term exposures must be viewed with caution, such contrasting response patterns between species might be used for biomonitoring purposes in the field, in order to distinguish between short-term and long-term effects of ozone exposure.…”

Section: mentioning

confidence: 99%

“…This knowledge would also allow the establishment of relationships between ozone sensitivity and taxonomic or ecological characteristics of species. Sensitivity classifications on the basis of visible injury exist for only a small number of wild plant species (Cornelius et al, 1985 ;Mortensen & Nilsen, 1992 ;Reiling & Davison, 1992a ;Nebel & Fuhrer, 1994 ;Warwick & Taylor, 1995 ;Grub et al, 1997 ;Bungener et al, 1999). These experiments were performed under very different exposure conditions and ozone-exposure regimes.…”

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confidence: 99%

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Ozone threshold doses and exposure–response relationships for the development of ozone injury symptoms in wild plant species

Bergmann¹,

Bender²,

Weigel³

1999

New Phytologist

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The relative ozone sensitivities of 25 German native herbaceous plant species, representative of arable field margins or disturbed habitats, were examined over three consecutive growing seasons. Plants were grown from seed, potted into natural soils and exposed in open-top chambers for the entire season to different ozone-exposure regimes covering a range of concentrations from 5 to 48 ppb (seasonal 8 h daily mean). The assessment of ozone effects was carried out by recording the first day of visible symptom appearance and the percentage of injured leaves at the end of vegetative growth. Species exhibited contrasting patterns of symptom expression under ozone stress, with either ozone-specific symptoms or ozone-enhanced foliar pigmentation and senescence. Classifications of species according to their ozone susceptibility varied depending on whether measurement was of the total extent of visible injury, ozone threshold doses for the incidence of symptoms, or modelled exposure-response relationships. The most sensitive species exhibiting ozone-specific symptoms were Cirsium arvense and Sonchus asper, which responded to accumulated ozone exposures 1500 ppb.h (AOT40). For these and three other species, an AOT40 peak of a single day was found to be responsible for the incidence of ozonespecific symptoms, i.e. injury occurred rapidly within a few days of the day with the highest AOT40, while other species responded only to longer-term ozone exposures. The relative ozone sensitivity of the species was calculated by combining the different sensitivity criteria, and possible systematic trends (taxonomic or evolutionary features) are pointed out. The results suggest it may be possible to use a particular group of native herbaceous plant species with contrasting patterns of ozone sensitivity as a biomonitoring system in the field. This allows plant responses to be related either to peak values or to prolonged ozone exposure, making it possible to distinguish between shortand long-term effects of ozone.

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Section: mentioning

confidence: 99%

Section: mentioning

confidence: 99%

mentioning

confidence: 99%

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Ozone threshold doses and exposure–response relationships for the development of ozone injury symptoms in wild plant species

Bergmann¹,

Bender²,

Weigel³

1999

New Phytologist

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“…stress due to deicing salt, heavy metals, SO 2 and other harmful substances, have been studied (Antonovics et al 1971, Bornkamm 1990, Darius 1996, Rebele 1996. Bornkamm et al (1982) refer to international investigations and ecosystem studies on suburban forests (Faensen-Thiebes et al 1991), which gave a new impetus to general ecology (Cornelius et al 1999).…”

Section: Vegetationmentioning

confidence: 99%

On the Early History of Urban Ecology in Europe

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Sukopp H. (2002): On the early history of urban ecology in Europe. Praha, Early investigations on the ecology of cities were in the tradition of natural history and focused on single biotopes. Of special interest were the plants and animals introduced into new areas directly or indirectly by man. In Central Europe, studies of anthropogenic plant migrations and cultural history were combined in a specific way, the so called Thellungian paradigm. The succession of vegetation on ruins after the bombing during the Second World War was studied in many cities. Ecological studies on whole cities started in the 1970s with investigations on energy flow and nutrient cycling. Today the term urban ecology is used in two different ways: in developing programs for sustainable cities, and in investigation of living organisms in relation to their environment in towns and cities.K e y w o r d s : urban flora and vegetation, human impact, ecological studies, Thellungian paradigm

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Population Ecology

Cited by 2 publications

References 140 publications

Ozone threshold doses and exposure–response relationships for the development of ozone injury symptoms in wild plant species

Ozone threshold doses and exposure–response relationships for the development of ozone injury symptoms in wild plant species

On the Early History of Urban Ecology in Europe

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