The influence of regional gradients in climate and air pollution on epiphytes in riparian forest galleries of the upper Fraser River watershed

Coxson, Darwyn S.; BjörkCurtis,; Danielle, BourassaMarie

doi:10.1139/cjb-2013-0151

Cited by 7 publications

(4 citation statements)

References 44 publications

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“…4; Table 3). Coxson et al 2014) of L. pulmonaria probably caused its low RGR and depressed viability Table 4. Coxson et al 2014) of L. pulmonaria probably caused its low RGR and depressed viability Table 4.…”

Section: Discussionmentioning

confidence: 99%

“…The high heavy metal- (Branquinho et al 1997; Cabral 2002) and air pollutant-susceptibility (e.g. Coxson et al 2014) of L. pulmonaria probably caused its low RGR and depressed viability near the road. The other species were remarkably resistant to traffic pollutants, although chlorophyll degradation slightly increased with decreasing distance from the road.…”

Section: Discussionmentioning

confidence: 99%

“…The high heavy metal- (Branquinho et al 1997;Cabral 2002) and air pollutant-susceptibility (e.g. Coxson et al 2014) of L. pulmonaria probably caused its low RGR and depressed viability Table 4. Pearson correlation coefficients between species-specific relative growth rate (RGR), maximal quantum yield of PSII (F v /F m ), total chlorophyll concentration (Chl ab) and chlorophyll a/b-ratio (Chla/b) versus log-transformed concentrations of analyzed elements across six transects and five distances.…”

Section: Discussionmentioning

confidence: 99%

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Spatial dispersal of airborne pollutants and their effects on growth and viability of lichen transplants along a rural highway in Norway

Yemets¹,

Solhaug²,

Gauslaa³

2014

The Lichenologist

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This study aims to quantify dispersal of airborne traffic-related elemental pollutants and concurring responses -relative growth rate (RGR), maximal quantum yield of PSII (F v /F m ), and chlorophylls (Chl ab) -in four epiphytic lichens (Lobaria pulmonaria, Parmelia sulcata, Ramalina farinacea, Usnea dasopoga). Lichens were transplanted from 25 September to 26 March to 1Á5 m tall stands in open farmlands at 10, 15, 30, 50 and 100 m from the E6 highway (SE Norway), along three transects on each side usnea dasopoga of the road. The concentrations of most elements (Ca, Mg, Na, Fe, Al, Zn, Ba, Cu, V, Cr, Ni, Co, Sn, As, Mo) significantly increased with increasing proximity to the road. Elements in bold had elevated concentrations relative to controls, at least in some species at 100 m. The heavy metal accumulation increased from foliose to fruticose lichens in the order: P. sulcata > L. pulmonaria > R. farinacea X U. dasopoga. However, L. pulmonaria was the only species with strong pollutant-dependent reductions in growth, F v /F m , Chl ab, and Chl a/b-ratio. The RGR and viability parameters were adversely affected by the roadside environment near the road only (a15 m), and only after substantial heavy metal accumulation. Measurement of metal accumulation in lichens is thus a far more sensitive way of monitoring road pollutants than recording growth and lichen viability. Despite strong species-specific contrasts in elemental concentrations, most road pollutant elements responded similarly to distance from the road in all species.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

“…The high heavy metal- (Branquinho et al 1997;Cabral 2002) and air pollutant-susceptibility (e.g. Coxson et al 2014) of L. pulmonaria probably caused its low RGR and depressed viability Table 4. Pearson correlation coefficients between species-specific relative growth rate (RGR), maximal quantum yield of PSII (F v /F m ), total chlorophyll concentration (Chl ab) and chlorophyll a/b-ratio (Chla/b) versus log-transformed concentrations of analyzed elements across six transects and five distances.…”

Section: Discussionmentioning

confidence: 99%

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Spatial dispersal of airborne pollutants and their effects on growth and viability of lichen transplants along a rural highway in Norway

Yemets¹,

Solhaug²,

Gauslaa³

2014

The Lichenologist

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“…For example, the historical acidic precipitation in industrial regions caused some corticolous lichens to switch from conifers (naturally acidic) to deciduous trees [ 170 , 171 , 172 , 173 ]. Such acidity-driven patterns persist locally until today [ 174 ]. Goward and Arsenault [ 95 ] even hypothesize that the general scarcity of cyanolichens on conifers in Europe (compared with North America) is caused by the pervasive industrial pollution that has chemically degraded European pristine conifer habitats.…”

Section: Causal Mechanisms: Ecophysiology and Demographic Processesmentioning

confidence: 99%

Regionally Varying Habitat Relationships in Lichens: The Concept and Evidence with an Emphasis on North-Temperate Ecosystems

Lõhmus

Motiejūnaitė

Lõhmus

2023

JoF

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Habitat ecology of lichens (lichen-forming fungi) involves diverse adaptations to stressful environments where lichens use specific habitat conditions. Field observations confirm that such habitat ‘preferences’ can vary significantly across species’ distribution ranges, sometimes revealing abrupt changes over short distances. We critically review and generalize such empirical evidence as broad ecological patterns, link these with the likely physiological mechanisms and evolutionary processes involved, and outline the implications for lichen conservation. Non-replicated correlative studies remain only suggestive because the data are frequently compromised by sampling bias and pervasive random errors; further noise is related to unrecognized cryptic species. Replicated evidence exists for three macroecological patterns: (a) regional limiting factors excluding a species from a part of its microhabitat range in suboptimal areas; (b) microhabitat shifts to buffer regionally adverse macroclimates; (c) substrate suitability changed by the chemical environment, notably air pollution. All these appear to be primarily buffering physiological challenges of the adverse conditions at the macrohabitat scale or, in favorable environments, coping with competition or predation. The roles of plasticity, adaptation, dispersal, and population-level stochasticity remain to be studied. Although lichens can inhabit various novel microhabitats, there is no evidence for a related adaptive change. A precautionary approach to lichen conservation is to maintain long-term structural heterogeneity in lichen habitats, and consider lichen ecotypes as potential evolutionarily significant units and a bet-hedging strategy for addressing the climate change-related challenges to biodiversity.

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Comparing Chinese and international studies of riparian forests: A bibliometric survey (1981–2014)

Ding

Zhao

2016

Acta Ecologica Sinica

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The influence of regional gradients in climate and air pollution on epiphytes in riparian forest galleries of the upper Fraser River watershed

Cited by 7 publications

References 44 publications

Spatial dispersal of airborne pollutants and their effects on growth and viability of lichen transplants along a rural highway in Norway

Spatial dispersal of airborne pollutants and their effects on growth and viability of lichen transplants along a rural highway in Norway

Regionally Varying Habitat Relationships in Lichens: The Concept and Evidence with an Emphasis on North-Temperate Ecosystems

Comparing Chinese and international studies of riparian forests: A bibliometric survey (1981–2014)

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