Nitrogen and carbon isotope variability in the green‐algal lichen <i><scp>X</scp>anthoria parietina</i> and their implications on mycobiont–photobiont interactions

Beck, Andreas; Mayr, Christoph

doi:10.1002/ece3.417

Cited by 51 publications

(33 citation statements)

References 74 publications

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“…Carbon isotope δ 13 C data (Fig. 2) of the current lichens from ten stations (−23.94 ± 1.05‰, n = 10) were comparable to the literature data of German samples (Beck and Mayr, 2012), whereas the historical samples were less negative (−20.46 ± 1.07‰, n = 10). Data from these two groups were significantly different (p b 0.001, t-test, α = 0.05), and the SEM observations of both current (2012) and herbarium (1916) samples of X. parietina from PSC (Fig.…”

Section: Herbarium Samplessupporting

confidence: 74%

Origin and distribution of rare earth elements in various lichen and moss species over the last century in France

Agnan

Séjalon‐Delmas

Probst

2014

Science of The Total Environment

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Rare earth elements (REE) are known to be powerful environmental tracers in natural biogeochemical compartments. In this study, the atmospheric deposition of REE was investigated using various lichens and mosses as well as herbarium samples from 1870 to 1998 from six major forested areas in France. The comparison between the REE distribution patterns in organisms and bedrocks showed a regional uniformity influence from dust particles originating from the bedrock and/or soil weathering that were entrapped by lichens and mosses. These lithological signatures were consistent over the last century. The REE patterns of different organism species allowed minor influence of the species to be highlighted compared to the regional lithology. This was even true where the morphological features played a role in the bioaccumulation levels, which were related to the variable efficiency in trapping atmospheric dust particles. A comparison between REE profiles in the organisms and bark indicated a lack of influence of the substrate on lichen REE content. Lichens and mosses appear to be robust passive monitors of REE atmospheric deposition over decades because the mineral data was preserved in herbarium samples despite organic degradation being shown by carbon isotopes and SEM observations. To overcome the bias of REE concentration that resulted from organic degradation, the use of a normalized method is recommended to interpret the historical samples.

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Section: Herbarium Samplessupporting

confidence: 74%

Origin and distribution of rare earth elements in various lichen and moss species over the last century in France

Agnan

Séjalon‐Delmas

Probst

2014

Science of The Total Environment

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“…Although N isotope data exclude predation as the principal N source, both within-category variation and overlap between ecosystem components (Table 1) preclude confirmation of pellet microbes, as opposed to plant sap, as the principal N source (see Appendix S4 for analysis of sampling issues). Lichen values are both low and substantially variable, as in other studies (even within species, and for diverse reasons), and likely represent mainly values for the mycobiont (Hietz et al 2002, Fogel et al 2008, Beck & Mayr 2012, Houlton et al 2015. In COCY species, d 15 N ranges from 1 to 5& greater than lichen values, making epiphytic fungi a possible N source, but the ants are also isotopically similar to sap-feeding insects, including ants (Table 1).…”

Section: Discussionmentioning

confidence: 54%

Nutrition of Borneo's ‘exploding’ ants (Hymenoptera: Formicidae:Colobopsis): a preliminary assessment

et al. 2016

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Functional effects of ants in rainforest canopies depend on difficult to characterize ant diets. In Bornean dipterocarp forests, certain diurnal, arboreal, territorial, and ecologically dominant 'COCY' ant species (Colobopsis cylindrica clade) grazed epiphytic biofilms on adaxial leaf surfaces, as well as on tree trunks and branches. Microscopic examination of worker buccal pellets revealed numerous (mainly ascomycete) fungal spores, together with insect appendages and cuticle. Direct observations, video-imaging, and d 15 N isotope data rule out feeding by predation, but isotopes cannot separate fungi from plant and insect exudates as principal nitrogen sources. Lipid-rich products, extracted from pellets in situ, are hypothesized sources of essential sterols. Also present in pellets were colorful mandibular gland (MG) compounds unique to this ant clade and deployed, as a derived character state, in suicidal defense of foraging territories. Mildly antimicrobial and highly adhesive MG products also occur basally in the clade and may have first evolved for roles in microbial sterilization and food-gathering and processing. Proteomic studies of YG COCY ants detected 2% proteins in hypertrophied, product-filled MG reservoirs, but SDS-PAGE qualitative analysis revealed mostly low-molecular mass proteins and peptides (8-15 kDa), too small for enzymes but consistent with membrane-binding proteins and/or antimicrobial peptides. Breakdown of chitin and chitosan in pellets may occur with enzymes derived from molting fluids in insect cuticle (proteases and chitinases) and/or fungi and bacteria. To the extent that COCY workers collect and consume pathogenic and/or beneficial phyllosphere microbes, ant effects on plants may be mediated by these activities.Abstract in Malay is available with online material.

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“…decolorans that is much more broadly distributed than the lichen‐forming fungus R. menziesii , and this suggests that this algal species has very different environmental tolerances. T. decolorans has been reported from several continents and in association with diverse fungal species (Helms et al ., ; Beck & Mayr, ; Werth, ; Muggia et al ., ; Nyati et al ., ,b). The wider distributional range and low specificity of T .…”

Section: Discussionmentioning

confidence: 99%

“…In contrast, the green alga T. decolorans that is much more broadly distributed than the lichen-forming fungus R. menziesii, and this suggests that this algal species has very different environmental tolerances. T. decolorans has been reported from several continents and in association with diverse fungal species (Helms et al, 2001;Beck & Mayr, 2012;Werth, 2012;Muggia et al, 2013;Nyati et al, 2013a, b). The wider distributional range and low specificity of T. decolorans imply that this photobiont may have persisted under more diverse environmental conditions and experienced a population history distinct from the mycobiont R. menziesii.…”

Section: No Co-migration Between Mycobionts and Photobiontsmentioning

confidence: 99%

Comparison of phylogeographical structures of a lichen‐forming fungus and its green algal photobiont in western North America

Chen

Werth

Sork

2015

Journal of Biogeography

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Aim Lichens comprise a symbiosis of two separate taxa that share geographical distribution but not necessarily the same evolutionary history. Comparison of phylogeographical structures of lichen symbionts provides valuable insight about the processes shaping the lichen's biogeographical pattern. In this study, we tested the extent to which the shared distribution of the widespread lichen‐forming fungus Ramalina menziesii and its photobiont Trebouxia decolorans across six major ecoregions reflect parallel genetic structure and gene flow. Location Western North America. Methods Based on DNA sequences from multiple genes, we employed distance‐based methods to assess co‐divergence of symbiosis partners. To assess historical opportunity for co‐evolution, we compare migrations among six ecoregions. Results Tests of genetic concordance between the mycobiont and the photobiont genetic variation revealed an overall significant congruent genetic structure across ecoregions. However, the photobiont and the mycobiont do not have high congruencies within ecoregions and the two taxa have different histories of migration among ecoregions. Main conclusions Congruent phylogeographical patterns in several clades between the mycobiont and the photobiont on a large spatial scale can be explained either by parallel isolation due to ecological and geographical discontinuities or by similar selective pressures on the symbionts due to common environmental conditions within each ecoregion leading to co‐divergence. At the regional spatial scale, the two taxa share some degree of evolutionary history but the weak phylogeographical congruence within ecoregions and the lack of shared migration history both indicate a flexible association between mutualists. This flexibility may facilitate the widespread geographical distribution of the lichen.

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Nitrogen and carbon isotope variability in the green‐algal lichen Xanthoria parietina and their implications on mycobiont–photobiont interactions

Cited by 51 publications

References 74 publications

Origin and distribution of rare earth elements in various lichen and moss species over the last century in France

Origin and distribution of rare earth elements in various lichen and moss species over the last century in France

Nutrition of Borneo's ‘exploding’ ants (Hymenoptera: Formicidae:Colobopsis): a preliminary assessment

Comparison of phylogeographical structures of a lichen‐forming fungus and its green algal photobiont in western North America

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