| 1. |
- Cronberg, Gertrud
(författare)
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Mallomonas pseudocoronata Prescott (Synurophyceae), a recent arrival in Scania, southern Sweden?
- 2010
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Ingår i: Nova Hedwigia. - : Schweizerbart. - 0029-5035 .- 1438-9134. ; , s. 139-151
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Konferensbidrag (refereegranskat)abstract
- Since the early 1960s, water chemistry and phytoplankton have been monitored in several lakes in Sweden. However, as early as 1900-1901, the German algologist Lemmermann investigated phytoplankton from lakes in Scania, southern Sweden. Several phytoplankton samples from these investigations were preserved and saved, and are deposited at the Department of Ecology in the University of Lund. These old samples have again been studied to assess potential changes in the phytoplankton community during the 20(th) century. Special emphasis has been focused on scaled chrysophytes. Since 1971 scaled chrysophytes from lakes and ponds in Scania have been investigated with SEM and/or TEM. This group of algae can at times be frequent in Scanian water bodies. Several scaled chrysophytes have endemic or restricted distribution. Mallomonas pseudocoronata Prescott, very common on the North American continent, has shown a restricted distribution outside the North American continent, only Japan, Russia and a subfossil record from Austria have been recorded. It had never been recorded from Sweden. In 2005, M. pseudocoronata was recorded for the first time in samples from Lake Borringesjon, Scania, and subsequently in eight more Scanian water bodies. Since M. pseudocoronata has not earlier been found in western and central Europe, it may be a new immigrant from America or Siberia, partially by transportation from migrating birds.
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| 2. |
- Frisch, Andreas, et al.
(författare)
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Four new Arthoniomycetes from Bwindi Impenetrable National Park, Uganda - supported by molecular data
- 2014
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Ingår i: Nova Hedwigia. - : Schweizerbart. - 0029-5035 .- 1438-9134. ; 98, s. 295-312
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Tidskriftsartikel (refereegranskat)abstract
- Arthonia physcidiicola Frisch & G.Thor, Chiodecton sorediatum G.Thor & Frisch, Herpothallon kigeziense Frisch & G.Thor and Reichlingia syncesioides Frisch & G.Thor are described as new to science. All species have been collected in the montane rainforests of Bwindi Impenetrable National Park in south western Uganda. The earlier monotypic genus Reichlingia with one anamorphic species is emended to include three fertile species and is newly reported to Africa. The combinations Reichlingia virginea (Mull.Arg.) Frisch for Arthothelium virgineum Mull.Arg. from the Usambara Mts. in north eastern Tanzania, and Reichlingia zwackhii (Sandst.) Frisch & G.Thor for the European Arthonia zwackhii Sandst. are made. A phylogenetic tree based on Bayesian and ML analyses of combined mtSSU, nLSU and RPB2 data showing the position of the new species in Arthoniomycetes is presented.
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| 3. |
- Baur, Bruno, et al.
(författare)
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Effect of rock climbing on the calcicolous lichen community of limestone cliffs in the northern Swiss Jura Mountains
- 2007
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Ingår i: Nova Hedwigia: Zeitschrift für Kryptogamenkunde. - : Schweizerbart. - 0029-5035. ; 85:3-4, s. 429-444
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Tidskriftsartikel (refereegranskat)abstract
- Exposed limestone cliffs in the Swiss Jura Mountains harbour a diverse lichen community with some rare species. Sport climbing has recently increased in popularity on these cliffs. We examined the effect of sport climbing on calcicolous lichens by assessing species diversity and cover of lichens in climbed and unclimbed areas of 10 isolated cliffs in the northern Swiss Jura Mountains. We also investigated possible associations between lichens and lichen-feeding land snails on these cliffs. A total of 38 calcicolous lichen species, three bryophytes and one alga were found on the rock faces of 10 cliffs. Twenty lichen species (52.6%) were epilithic, 16(42.1%) endolithic and two (5.3%) foliose. Overall, the epilithic lichen species covered 8.3% of the rock surface, endolithic species 10.2%, and foliose species 0.03%. Climbed and unclimbed rock areas did not differ in total number of lichen species, species density (number of species per 100 cm(2)) or total lichen cover. However, the frequency of occurrence of epilithic lichens was lower along climbing routes than in unclimbed areas. A multi-response permutation test showed that the lichen community composition of climbed areas differed from that of unclimbed areas. The dissimilarity of lichen communities between climbed and unclimbed areas increased with increasing climbing intensity on the focal route in climbed areas, but not with the age of the climbing route. Five of the 11 snail species recorded on the cliff faces were specialized lichen feeders. Plots along climbing routes harboured fewer snail species than plots in unclimbed areas. Total snail abundance was positively correlated with lichen species richness, but no correlation between snail species richness and lichen species richness was found. Our results indicate that frequent rock climbing can change the lichen community and reduce the snail community of limestone cliffs. A climbing-related reduction of snail abundance may also alter the lichen-herbivore interaction and indirectly change competitive interactions among lichen species.
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| 4. |
- Cronberg, Gertrud, et al.
(författare)
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Some nostocalean cyanoprokaryotes from lentic habitats of Eastern and Southern Africa
- 2004
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Ingår i: Nova Hedwigia: Zeitschrift für Kryptogamenkunde. - : Schweizerbart. - 0029-5035. ; 78:1-2, s. 71-106
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Tidskriftsartikel (refereegranskat)abstract
- The article comprises the second part (Nostocales) of our study of little known planktic and metaphytic cyanoprokaryotes (cyanophytes, cyanobacteria) from ponds, lakes and water reservoirs in East and Southern Africa. The morphology and variation of 17 species was studied, and comments about their ecology and taxonomy are included. Seven new species are defined: Anabaena austro-africana, A. carmichaelii, A. bituri, A. maxima, A. nygaardii, Aphanizomenon capricorni and Cylindrospermopsis helicoidea. In one tropical species, Cylindrospermopsis africana, akinete formation was found and described for the first time. These investigations of cyanoprokaryotic algae from Africa indicate the existence of a specific and unique tropical microflora. Based on our findings we predict that many more taxa will be found in the future.
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| 5. |
- Nguyen, Lien Thi Thu, et al.
(författare)
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Planktic cyanobacteria from freshwater localities in ThuaThien-Hue province, Vietnam. II. Algal biomass and microcystin production
- 2007
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Ingår i: Nova Hedwigia: Zeitschrift für Kryptogamenkunde. - : Schweizerbart. - 0029-5035. ; 85:1-2, s. 35-49
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Tidskriftsartikel (refereegranskat)abstract
- A survey of cyanobacteria was carried out from February to August of 2004 along the Huong River and Hoamy Reservoir which supply part of the City of Hue, Vietnam with drinking water: also at some localities in the vicinity of the City of Hue. Quantitative analyses and screening for microcystin by ELISA and HPLC were done both in natural samples and in cultured cyanobacteria. The total biomass of cyanobacteria ranged from 0 to 3039 mg L-1 [wet weight (ww)] with Arthrospira massartii, Jaaginema sp., Merismopedia spp., Microcystis spp., Oscillatoria perornata, and Planktothrix zahidii as the dominating species. In the water samples, microcystins detected by ELISA varied between 0 and 76.2 mu g L-1. Concentrations above 1 mu g L-1, which is considered the safety limit for drinking water by WHO, were not found in the drinking water resources. Cultured strains of Microcystis aeruginosa, M. panniformis, M. botrys and Pseudanabaena cf. moniliformis were shown by ELISA to produce microcystins. The major microcystins produced were microcystin-LR and -RR, as detected by HPLC.
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| 6. |
- Søchting, Ulrik, et al.
(författare)
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The lichen genus Caloplaca (Ascomycota, Lecanoromycetes) on Svalbard. Notes and additions.
- 2008
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Ingår i: Nova Hedwigia: Zeitschrift für Kryptogamenkunde. - : Schweizerbart. - 0029-5035. ; 87:1-2, s. 69-96
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Tidskriftsartikel (refereegranskat)abstract
- 23 species of the lichen genus Caloplaca from Svalbard are described and/or discussed. The descriptions are natural language descriptions based on characters for each species coded into LIAS (Global Information System for Lichenized and Non-Lichenized Ascomycetes). A total of 37 Caloplaca species are listed for Svalbard, of which two species: C. elvebakkiana and C. scabrosa are described as new to science. C. alaskensis is recorded for the first time from Svalbard. A key to the Caloplaca species known from Svalbard is provided.
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| 7. |
- Thanh Son Dao, N., et al.
(författare)
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Toxic cyanobacteria from Tri An Reservoir, Vietnam
- 2010
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Ingår i: Nova Hedwigia: Zeitschrift für Kryptogamenkunde. - : Schweizerbart. - 0029-5035. ; 90:3-4, s. 433-448
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Tidskriftsartikel (refereegranskat)abstract
- Seven strains of cyanobacteria from Tri An Reservoir, a drinking water reservoir for millions of people in Southern Vietnam, were isolated, cultivated, identified and described. They originated from the species Microcystis aeruginosa, M. botrys, M. wesenbergii, Anabaena A. smithii, Aphanizomenon aphanizomenoides and Cylindrospermopsis raciborskii. Microcystin (MC) content in the cultures and two scum samples from Tri An Reservoir were determined by high performance liquid chromatography. Four variants of MC, MC-LR, MC-RR, MC-LA, MC-LY and one un-determined variant were detected in the scum samples but none were found in the cultures. The two variants MC-LA and MC-LY were recorded for the first time for Vietnam. Total MC concentrations in the two scum samples were 0.45 and 0.64 mg g(-1) dried weight, respectively. The genus Microcystis in Tri An Reservoir was assumed to be a MC producer as the other possible MC producing species A. circinalis was usually detected in lower quantities.
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| 8. |
- Lindblom, Louise, et al.
(författare)
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RAPDs distinguish the lichens Xanthoria aureola and X. parietina in a mixed seashore rock population
- 2012
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Ingår i: Nova Hedwigia. - : Schweizerbart. - 0029-5035. ; 94:3-4, s. 279-285
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Tidskriftsartikel (refereegranskat)abstract
- Morphological characters can vary to an extent that makes it difficult to separate the two morphologically and chemically similar species Xanthoria aureola and X. parietina for an inexperienced field biologist. They occur frequently in mixed stands on seashore rocks on the western coast of Norway. We examined (1) whether a simple method like RAPD-PCR could confirm the distinction between the two species previously reported on the basis of DNA sequences, and (2) whether infraspecific DNA and RAPD data from X. parietina were congruent. We also checked whether the RAPD band scoring procedure could affect the results. Results show that (1) RAPD distance matrices based on band scorings performed independently by the two authors were always congruent and differences never affected conclusions, (2) RAPD clearly distinguishes between X. parietina and X. aureola in a way that is fully congruent with a classification based on DNA sequence data, and (3) there was no significant congruence between infraspecific distances based on DNA sequences and RAPD data in X. parietina. The latter observation may be taken as support for a previously published report of low levels of recombination in X. parietina, which stands in contrast to statements of obligate homothallism in that species.
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| 9. |
- Adamonyte, G, et al.
(författare)
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Morphological variation and taxonomic characters in Cribraria (Myxomycetes) from the Great Smoky Mountains National Park in eastern USA
- 2010
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Ingår i: NOVA HEDWIGIA. - : Schweizerbart. - 0029-5035. ; 90:3-4, s. 303-320
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Tidskriftsartikel (refereegranskat)abstract
- Cribraria is one of the most taxonomically difficult genera in the myxomycetes. The genus as a whole is well characterized but several of the currently accepted species are vaguely defined with ranges of morphological variation overlapping. Morphological characters are discussed based on specimens of eleven species from the Great Smoky Mountains National Park in eastern U.S.A. Cribraria persoonii, C. piriformis and C. vulgaris are reported from the National Park for the first time, making a total of 21 species of the genus so far recorded in the Park. Other species discussed in some detail include C. elegans, C. intricata. C. languescens, C. macrocarpa and C. oregano. Light photomicrographs illustrate most of the species.
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| 10. |
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| 11. |
- Ihlen, P.G., et al.
(författare)
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An annotated key to the lichenicolous Ascomycota (including mitosporic morphs) of Sweden
- 2008
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Ingår i: Nova Hedwigia. - : Schweizerbart. - 0029-5035. ; 86, s. 275-365
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Tidskriftsartikel (refereegranskat)abstract
- An annotated key to the lichenicolous (lichen-inhabiting) Ascomycota, including mitosporic morphs, known from Sweden is presented. Recent additions, both from the literature and our own collections, of these fungi to the Swedish flora are also included. A total of 298 ascomycetes representing 83 genera, and 65 mitosporic fungi from 31 genera, have been found to occur in Sweden. Each species keyed out is followed by information and selected literature references on morphology, distribution, and ecology. Taxonomic notes and discussions are given for several critical genera and species, and selected species are illustrated.
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| 12. |
- Young-Joon, Choi, et al.
(författare)
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A new downy-mildew of the Rosaceae : Peronospora oblatispora sp. nov. (Chromista, Peronosporales)
- 2007
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Ingår i: Nova Hedwigia. - : Schweizerbart. - 0029-5035. ; 85:1-2, s. 93-101
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Tidskriftsartikel (refereegranskat)abstract
- Peronospora oblatispora sp. nov., parasitic on Potentilla chrysantha, P. paradoxa, P. supina and Aphanes microcarpa, is described from 11 specimens collected in France, Korea and Romania. By its oblate conidia it differs morphologically from both P. sparsa and P. potentillae. The morphological discrepancy is supported by high genetic distances to the other two species and the larger insertions in ITS rDNA.
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| 13. |
- Al-Handal, Adil Y, 1952, et al.
(författare)
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- Nitzschia biundulata sp. Nov. a new sea ice diatom (bacillariophyceae) from the ross sea, Antarctica
- 2019
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Ingår i: Nova Hedwigia: Zeitschrift für Kryptogamenkunde. - : Schweizerbart. - 0029-5035. ; 108:3-4
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Tidskriftsartikel (refereegranskat)abstract
- - A new marine diatom species, Nitzschia biundulata is described. This species was collected and isolated from the ice cover in the Amundsen Sea, Antarctica during the Austral summer, 2011. The description is based on light and scanning electron microscopes examination as well as molecular analysis including 18S SSU rRNA and rbcL. Morphologically, N. biundulata is characterized by having two extensions of the valve margin in a form of two unequal undulations that are not seen in other taxa of the genus. Molecular sequence data indicated similarity with several Nitzschia species such as Nitzschia apiculata, N. palea, N. capitellata as well as Bacillaria paxillifer. Interestingly, large similarity was found with endosymbiont diatom associated with the dinophyte Peridinium balticum. A comparison with the most related species is provided. © 2019 J. Cramer in Gebrüder Borntraeger Verlagsbuchhandlung, Stuttgart, Germany.
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| 14. |
- Athanasiadis, Athanasios
(författare)
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Carlskottsbergia antarctica (Hooker fil. & harv.) gen. & comb. nov., with a re-assessment of synarthrophyton (mesophyllaceae, corallinales, rhodophyta)
- 2019
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Ingår i: Nova Hedwigia: Zeitschrift für Kryptogamenkunde. - : Schweizerbart. - 0029-5035. ; 108:3-4
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Tidskriftsartikel (refereegranskat)abstract
- - Carlskottsbergia antarctica gen. & comb.nov., considered to be a distinct species for more than a century and more recently subsumed in the broad concept of Synarthrophyton patena, is segregated possessing monostromatic hypothallium (polystromatic in Synarthrophyton), and tetrasporophytes with straight to pyriform canals (larger conical canals in Synarthrophyton). Male conceptacles develop lunate, unbranched spermatangial mother cells (SMCs) on the floor, the walls and the roof (either unbranched, or branched-dendroid SMCs, or hermaphroditic in Synarthrophyton). Carpogonial branches are two-or three-celled and post-fertilization stages involve a fusion cell that incorporates at least one hypogynous and neighboring supporting cells, leaving adjacent hypogynous cells intact. Gonimoblast filaments radiate incorporating the cytoplasm of peripheral hypogynous cells and cut off carposporangia from the periphery of the fertile zone that occurs on a flattened chamber floor (as in Synarthrophyton). Carlskottsbergia antarctica is widely distributed, including localities in southern Chile and southern Argentine, the Falklands, and co-occurring with S. patena in New Zealand and the Aucklands. The circumscription of Synarthrophyton is restricted to include the generitype S. patena from New Zealand and the Aucklands, and species from southern Australia (the latter differing in developing branched-dendroid SMCs and a larger thallus). © 2018 J. Cramer in Gebrüder Borntraeger Verlagsbuchhandlung, Stuttgart, Germany.
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| 15. |
- Athanasiadis, Athanasios
(författare)
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Zygote transfer and post-fertilization stages in Mesophyllum (Mesophyllaceae, Corallinales, Rhodophyta)
- 2018
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Ingår i: Nova Hedwigia. - : Schweizerbart. - 0029-5035. ; 107:3-4, s. 519-529
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Tidskriftsartikel (refereegranskat)abstract
- Zygote transfer in Mesophyllum lichenoides involves a cell tube developed from the basal part of the carpogonium, connecting it with the supporting (auxiliary) cell of the same branch system (procarpy). After zygote transfer, neighbouring supporting and hypogenous cells coalesce to form a fusion cell, where subtending basal cells are also connected. In Mesophyllum philippii, the fusion cell includes at least one carpogonium and proliferates radially to produce gonimoblast filaments, which cut off terminal carposporangia. The cytoplasm of hypogenous cells, which do not participate in the fusion cell, is sucked in the gonimoblast filaments, leaving characteristic cell wall remains (linking carpogonia to gonimoblast filaments). In both species, the subtending basal cells establish wide connections to the fusion cell, and cells of the gonimoblast filaments, but remain intact and do not coalesce.
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| 16. |
- Constantinescu, Ovidiu
(författare)
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A revision of Basidiophora (Chromista, Peronosporales)
- 1998
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Ingår i: Nova Hedwigia. - 0029-5035. ; 66:1-2, s. 251-265
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- The genus Basidiophora (Chromista, Oomycota, Peronosporales) is revised and restricted to one species, B. entospora, with the recently described B. montana as a synonym. Basidiophora kellermanii is transferred to a new genus, Benua. The two species are de
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| 17. |
- Cronberg, Gertrud, et al.
(författare)
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New species of Uroglena and Ochromonas (Chromulinales, Chrysophyceae) from Estonia
- 2005
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Ingår i: Nova Hedwigia: Zeitschrift für Kryptogamenkunde. - 0029-5035. ; Suppl. 128, s. 43-63
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- During the spring of 2003 ninety-five water bodies in southeastern Estonia were surveyed for chrysophytes. The sampling was carried out as the ice broke up, when, within two weeks, the water temperature rose from 3 degrees C to 13 degrees C. Large lakes to small pools of different water chemistry were investigated. The plankton collected was studied alive within a few hours after sampling. Preparations for scanning electron microscopy (SEM) were made from fresh samples and later also from material preserved in Lugol's solution. About 95% of the water bodies contained chrysophytes. Species belonging to the genera Chrysosphaerella, Dinobryon, Mallonionas, Synura, Ochromonas, Paraphysomonas, Spiniferomonas, Uroglena and Uroglenopsis were recorded. The genus Uroglena was frequent and recorded in 30% of the localities studied. Mass development of different Uroglena species was found in several waterbodies. Many populations had developed stomatocysts (statospores, cysts) of different morphology, and, using LM, smooth stomatocysts and stomatocysts with long spines could be recognised. However, using SEM, it was shown that also the smooth stomatocysts had short spines. Four new species of Uroglena were found and are described here. Uroglena estonica and U. spinosa had long spines while U. kukkii and U. pikamae had very short spines. In addition, mass development of stomatocysts of an Ochromonas was recorded in two lakes. This species had similarities with Ochromonas stellaris, but differed in stomatocyst ornamentation, and is also described as a new species, O. magnifica.
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| 18. |
- Eliasson, Uno
(författare)
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Review and remarks on current generic delimitations in the myxomycetes, with special emphasis on Licea, Listerella and Perichaena
- 2017
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Ingår i: Nova Hedwigia. - : Schweizerbart. - 0029-5035. ; 104:1-3, s. 343-350
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Tidskriftsartikel (refereegranskat)abstract
- Genera and species of myxomycetes have been based traditionally on morphological features of the fruitbodies (sporocarps). Certain species bridge the gap between two genera by combining morphological characters, such as is the case for Hemitrichia leiocarpa, which combines characters of Hemitrichia and Arcyria and could equally well be placed in either genus on morphological grounds. A few species of Physarum and Badhamia combine characters of both genera. Molecular investigations are today a powerful tool for investigating evolutionary relationships, and there is molecular evidence that the two physaraceous genera mentioned above can no longer be maintained as presently circumscribed. Paraphyly has been demonstrated in the Stemonitales and additional molecular data are likely to necessitate changes in the circumscription of some genera. Certain species of Licea and Perichaena have minute sporocarps with simple morphology. Smaller sporocarps of some species of Perichaena may lack a capillitium and be morphologically similar to species of Licea, which blurs the line of separation between these two genera. The genus Licea remains enigmatic and is almost certainly unnatural, even after the removal of L. fimicola to a separate genus. Additional molecular investigations are necessary to elucidate the relationships among the different species.
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| 19. |
- Halıcı, Mehmet Gökhan, et al.
(författare)
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Teuvoahtiana meridionalis, a new species from Patagonia and Antarctica
- 2023
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Ingår i: Nova Hedwigia. - 0029-5035. ; 116:3-4, s. 417-432
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Tidskriftsartikel (refereegranskat)abstract
- The new species Teuvoahtiana meridionalis is described from Antarctica and Southern South America. Even though the new species is morphologically and chemically variable, it is mo-lecularly monophyletic and located in the genus Teuvoahtiana in the subfamily Xanthorioideae. The genetic variation could not be correlated to the variation in any other characters that could support any further division of the species. Teuvoahtiana, that includes three other species, has a varied morphology and is in need of further studies.
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| 20. |
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| 21. |
- Ikavalko, J, et al.
(författare)
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CHRYS 2004 - Preface
- 2005
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Ingår i: Nova Hedwigia: Zeitschrift für Kryptogamenkunde. - 0029-5035. ; 128
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)
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| 22. |
- Komarek, J, et al.
(författare)
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Some chroococcalean and oscillatorialean Cyanoprokaryotes from southern African lakes, ponds and pools
- 2001
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Ingår i: Nova Hedwigia: Zeitschrift für Kryptogamenkunde. - 0029-5035. ; 73:1-2, s. 129-160
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Tidskriftsartikel (refereegranskat)abstract
- This article is the first part (Chroococcales and Oscillatoriales) of a study of little known planktic and metaphytic cyanoprokaryotes (cyanophytes, cyanobacteria) from ponds, lakes and water reservoirs in southern Africa. Thirty-three species were observed, of which 24 are presented with comments. Ten new species are defined, and one species, originally described as a taxonomic form, is recombined to the specific level. Our results demonstrate the specificity of southern African cyanobacterial microflora.
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| 23. |
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| 24. |
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| 25. |
- Kärnefelt, Ingvar, et al.
(författare)
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Anatomy and systematics of usneoid genera in the Parmeliaceae.
- 1998
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Ingår i: Nova Hedwigia: Zeitschrift für Kryptogamenkunde. - 0029-5035. ; 67:1-2, s. 71-92
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Tidskriftsartikel (refereegranskat)abstract
- The anatomy of 11 genera earlier included in the Usneaceae, i.e. Bryocaulon Karnef., Chondropsis NyI., Cornicularia Hoffm., Evernia Ach., Everniopsis Nyl., Himantormia Lamb, Letharia (Th. Fr.) Zahlbr., Lethariella (Mot.) Krog, Protousnea (Mot.) Krog, Pseudevernia Zopf and Usnea Adanson have been examined. Particular emphasis has been paid to the development of the apothecia and the formation of a meristematic cupular exciple, characters in cortex, asci and conidia. In this respect the examined material does not deviate from other genera included in the Parmeliaceae, and a separate family Usneaceae is not supported.
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| 26. |
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| 27. |
- TIBELL, L, et al.
(författare)
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REVISION OF SPECIES OF CHAENOTHECOPSIS WITH SHORT STALKS
- 1995
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Ingår i: NOVA HEDWIGIA. - : GEBRUDER BORNTRAEGER. - 0029-5035. ; 60:1-2, s. 199-218
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- The taxonomy, distribution and ecology of eight short-stalked species of Chaenothecopsis are described. The species are parasitic, parasymbiotic on lichens or free-living algae or saprophytic and are often quite specific with respect to host. A key to the
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