Papers by Jean-paul Theurillat
Vegetation Classification and Survey, Dec 10, 2023
For ninety years, the alliance name Festucion valesiacae has been widely and almost exclusively u... more For ninety years, the alliance name Festucion valesiacae has been widely and almost exclusively used to designate the al liance of steppic, xeric grasslands on deep soils from Central Europe to western Ukraine. However, there is an earlier, hardly used heterotypic synonym, the Festucion sulcatae, that would be the correct name according to the rules [recte: Festucion rupicolae nom. corr.]. In order to preserve a well-established name, we propose to conserve the name Festucion valesiacae against the name Festucion sulcatae. In addition, we typify the name Festucion rupicolae Soó 1930 nom. corr. with the association Festuco rupicolae-Stipetum pennatae Soó 1930 nom. corr., for which we also select a neotype. This proposal is supported by the fact that the alliance Festucion valesiacae is the conserved type of the order Festucetalia valesiacae. (35) Festucion valesiacae Klika 1931 Typus: Ranunculo illyrici-Festucetum valesiacae Klika 1931 (lectotypus designated by Toman 1975: 131) (=) Festucion rupicolae Soó 1930 nom. corr. (≡ Festucion sulcatae Soó 1930 nom. inept.) Typus: Festuco rupicolae-Stipetum pennatae Soó 1930 nom. corr. (lectotypus hoc loco) Taxonomic reference: Euro+Med (2023) unless otherwise indicated.
Acta botanica Croatica, Mar 4, 2024
The Romuleion, the only alliance of the order Poetalia bulbosae (class Poetea bulbosae) found on ... more The Romuleion, the only alliance of the order Poetalia bulbosae (class Poetea bulbosae) found on the Balkan Peninsula, represents Mediterranean perennial and ephemeral pastures. It has been found in several Balkan countries, from Greece to the Republic of North Macedonia, Montenegro, Croatia and Bulgaria. However, a revision of its nomenclature according to the fourth edition of the International Code of Phytosociological Nomenclature shows that the name of the alliance was not validly published. In this paper we therefore describe the new alliance Romuleion graecae, together with the new association Plantagini lagopodis-Poetum bulbosae.
Candollea, Dec 1, 2011
The second in a series, this paper continues the statistical analysis of the data published in «F... more The second in a series, this paper continues the statistical analysis of the data published in «Flora alpina». The characterization of biodiversity encompasses the altitudinal and worldwide distribution of the taxa. For each vegetation belt, the following results are provided: the numbers of families and genera, as well as lists of the most important ones, characteristic ones, and ones richest in endemics; the number of taxa that are present or exclusive; the rate of endemism; a cartographic pattern of endemism; and the number of taxa from each floristic contingent. Comparisons are made between the western and the eastern Alps, showing that the bicentrism is more pronounced in the lower belts. The relative weight of each floristic contingent is provided for the total flora and for the xenophytes, as well as being presented in the form of cartographic patterns for the main contingents. With almost a third of the taxa, the South-European montane contingent is the most important one. It is demonstrated that in the Alps, taxonomic richness is positively correlated with the relative weight of the Mediterranean contingent. The families and genera characterizing South-European montane and Arctic-Alpine contingents are listed.
Bulletin de la Murithienne, 1983
Zweite floristische Mitteilung über die Aletsch-Region (Wallis, Schweiz) Diese Mitteilung bestäti... more Zweite floristische Mitteilung über die Aletsch-Region (Wallis, Schweiz) Diese Mitteilung bestätigt die floristischen Beobachtungen, die im Aletschgebiet Wallis, Schweiz) im Rahmen des MAB-Projekts durchgeführt wurden. Einige davon sind neu, andere sind Ergänzungen zu denen, die im «Verbreitungsatlas der Farn-und Blütenpflanzen der Schweiz» zitiert werden. Zum ersten Mal wird mit Sicherheit fürs Wallis Scheuchzeria palustris L. angegeben. Darüber hinaus werden neue Standorte seltener Pflanzen für die Schweiz wie die von Cysloptcris dickieana R. Sim., Epilobium duriaei J. Gay ex Godr.. Sagina glabra (Willd.) Fenzl, Tulipa australis Link und verschiedene andere rare Pflanzen fürs Wallis und die Region Aletsch nachgewiesen.
Folia geobotanica et phytotaxonomica, Mar 1, 1992
The present work collects the new names of syntaxa (in the sense of the Code of phytosociological... more The present work collects the new names of syntaxa (in the sense of the Code of phytosociological nomenclature, BARKMAN et al. 1986) above subassociation rank found in the literature received by the Library of the Conservatoire Botanique in Geneva. For the year 1994 851 names were listed corresponding to 34 classes, 55 orders, 2 suborders, 128 alliances, 29 suballiances, and 603 associations. For each of them, an assessment of its validity is given relating to the Code of Phytosociological Nomenclature. 72 names are given to add to the Indices
Vegetation Classification and Survey, Dec 6, 2021
The two alliances Xerobromion and Mesobromion derive from the change of rank of two suballiances ... more The two alliances Xerobromion and Mesobromion derive from the change of rank of two suballiances of the Bromion Koch 1926 (Xerobromenion and Mesobromenion). Zoller (1954a) recognized that those suballiances could not belong to the same alliance (i.e. Bromion) and treated them as two separate alliances, although some doubts can be raised that he did not clearly adopted them at the rank of alliance. Zoller's work having been overlooked, other authors proposed subsequently to rise the Xerobromenion and Mesobromenion to the rank of alliances. Accordingly, the alliances Xerobromion and Mesobromion are often cited with author citations other than Zoller 1954. The present paper requests a binding decision on the valid publication of the names Xerobromion and Mesobromion in Zoller (1954a).
Bulletin de la Murithienne, 1986
ze zwischen den beiden Einheiten zu ziehen. Der subalpine Fichtenwald, genannt Homogyne-Piceetum ... more ze zwischen den beiden Einheiten zu ziehen. Der subalpine Fichtenwald, genannt Homogyne-Piceetum (Piceion excelsae), ist durch swchächere Deckung der Baumschicht (kerzenförmiger Wuchs der Bäume), das Verschwinden von montanen Arten wie dem Rundblättrigem Labkraut (Galium rotundifolium), das Auftreten subalpiner Pflanzen wie Alpenlattich (Homogyne alpina) gekennzeichnet. Trotz der offensichtlichen Einförmigkeit können doch mehrere Varianten unterschieden werden. Gegen 2000 m tritt an die Stelle des Fichtenwaldes ein Arvenwald (Pinus cembra), so den Übergang zur oberen Subalpinstufe bezeichnend. An Südhängen allerdings überleben die Arvenwälder nur noch an felsigen Orten wie am Riederhorn. Die Arvenwälder sind in zwei Gruppen aufgeteilt: einerseits wärmeliebende (Cotoneastro-Pinetum cembrae, Juniperion nanae), andererseits mesophile mit Heidelbeere und Rostblättriger Alpenrose (Larici-Pinetum cembrae, Piceion excelsae).
Folia geobotanica et phytotaxonomica, Jun 1, 1993
Following the "Index of new names" (THEURILLAT & MORAVEC 1998), the present work collects the nam... more Following the "Index of new names" (THEURILLAT & MORAVEC 1998), the present work collects the names of syntaxa (in the sense of the Code of phytosociological nomenclature, BARKMAN et al. 1986) above subassociation rank typified in 1994. The list comprises 101 names of syntaxa; three names are added to the Index 1992 (THEURILLAT & MORAVEC 1995).
Folia geobotanica et phytotaxonomica, Jun 1, 1993
The present work collects the new names of syntaxa (in the sense of the Code of phytosociological... more The present work collects the new names of syntaxa (in the sense of the Code of phytosociological nomenclature, BARKMAN et al. 1986) above subassociation rank found in the literature received by the Library of the Conservatoire Botanique in Geneva. For the year 1994 851 names were listed corresponding to 34 classes, 55 orders, 2 suborders, 128 alliances, 29 suballiances, and 603 associations. For each of them, an assessment of its validity is given relating to the Code of Phytosociological Nomenclature. 72 names are given to add to the Indices
Revue Suisse De Zoologie, 1996
In order to assess the impact of predicted climate changes in the next future, the floristic and ... more In order to assess the impact of predicted climate changes in the next future, the floristic and synusial structure of heathlands were studied along two altitudinal transects at the subalpine and alpine levels in the Alps of the Valais. The first, southeast oriented transect is dominated with thermophilous, low heaths of Arctostaphylos uva-ursi (L.) Sprengel. The second, east oriented transect is dominated with mesophilous, taller heaths with Rhododendron ferrugineum L., Vaccinium myrtillus L., V uliginosum subsp. microphyllum (Lange) Tolm. Both ecosystems show a thermal inertia but they will not react in the same way to climate change because the thermophilous heaths are mainly driven by temperature and the mesophilous heaths by snow cover.
The phenology of Rhododendron ferrugineum L. (Ericaceae) in correlation to temperature, frost, insolation, and snow cover duration
Phytocoenologia, Nov 24, 2000
Folia geobotanica et phytotaxonomica, Dec 1, 1996
The present work collects the new names of syntaxa (in the sense of the Code of phytosociological... more The present work collects the new names of syntaxa (in the sense of the Code of phytosociological nomenclature, BARKMAN et al. 1986) above subassociation rank found in the literature received by the Library of the Conservatoire Botanique in Geneva. For the year 1994 851 names were listed corresponding to 34 classes, 55 orders, 2 suborders, 128 alliances, 29 suballiances, and 603 associations. For each of them, an assessment of its validity is given relating to the Code of Phytosociological Nomenclature. 72 names are given to add to the Indices
Folia geobotanica et phytotaxonomica, Sep 1, 1994
The present work collects the new names of syntaxa (in the sense of the Code of phytosociological... more The present work collects the new names of syntaxa (in the sense of the Code of phytosociological nomenclature, BARKMAN et al. 1986) above subassociation rank found in the literature received by the Library of the Conservatoire Botanique in Geneva. For the year 1994 851 names were listed corresponding to 34 classes, 55 orders, 2 suborders, 128 alliances, 29 suballiances, and 603 associations. For each of them, an assessment of its validity is given relating to the Code of Phytosociological Nomenclature. 72 names are given to add to the Indices
Arctic, Antarctic, and Alpine Research, May 1, 2003
Pollen and macrofossils were analyzed at two sites above today's treeline (or tree limit) in the ... more Pollen and macrofossils were analyzed at two sites above today's treeline (or tree limit) in the Swiss Central Alps (Gouillé Loéré, 2503 m a.s.l., and Lengi Egga, 2557 m a.s.l.) to test two contrasting hypotheses about the natural formation of timberline (the upper limit of closed forest) in the Alps. Our results revealed that Pinus cembra-Larix decidua forests near timberline were rather closed between 9000 and 2500 B.C. (9600-4000 14 C yr BP), when timberline fluctuations occurred within a belt 100-150 m above today's tree limit. The treeline ecocline above timberline was characterized by the mixed occurrence of tree, shrub, dwarf-shrub, and herbaceous species, but it did not encompass more than 100-150 altitudinal meters. The uppermost limit reached by timberline and treeline during the Holocene was ca. 2420 and 2530 m, respectively, i.e., about 120 to 180 m higher than today. Between 3500 and 2500 B.C. (4700-4000 14 C yr BP) timberline progressively sank by about 300 m, while treeline was lowered only ca. 100 m. This change led to an enlargement of the treelineecocline belt (by ca. 300 m) after 2500 B.C. (4000 14 C yr BP). Above the treeline ecocline, natural meadows dominated by dwarf shrubs (e.g., Salix herbacea) and herbaceous species (e.g., Helianthemum, Taraxacum, Potentilla, Leontodon t., Cerastium alpinum t., Cirsium spinosissimum, Silene exscapa t., and Saxifraga stellaris) have been present since at least 11,000 cal yr ago. In these meadows tree and tall shrub species (.0.5 m) never played a major role. These results support the conventional hypothesis of a narrow ecocline with rather sharp upper timberline and treeline boundaries and imply that today's treeless alpine communities in the Alps are close to a natural stage. Pollen (percentages and influx), stomata, and charcoal data may be useful for determining whether or not a site was treeless. Nevertheless, a reliable and detailed record of past local vegetation near and above timberline is best achieved through the inclusion of macrofossil analysis.
Espaço Plural, 2011
As variações de altitude na linha de árvores nos Alpes durante o Holoceno foram investigadas prin... more As variações de altitude na linha de árvores nos Alpes durante o Holoceno foram investigadas principalmente por meio de análises de grãos de pólen e de macrofósseis de plantas. Atualmente é consenso que a floresta atingiu altitudes entre 2.400 e 3.000 metros (acima do nível do mar) durante o Ótimo Climático Atlântico (100 a 300metros acima da altitude atual). Essa ideia tem sido discutida há alguns anos e agora novas técnicas são necessárias para resolver este debate. Os solos alpinos podem atuar como arquivos de informações consideradas adequadas para a reconstrução da história da vegetação. Neste trabalho discute-se o potencial dos 5
Island of Bali Miguel Covarrubias with an Album of Photographs by Rose Covarrubias
periplus editions, Singapore, 1973
Bulletin de la Murithienne, 1980
Nomenclature of the class <i>Festuco-Brometea</i> in Italy and remarks on the interpretation of articles 1 and 2b ICPN
Botany letters, Jul 2, 2016
Abstract The class Festuco-Brometea includes the dry grassland and the steppe vegetation extendin... more Abstract The class Festuco-Brometea includes the dry grassland and the steppe vegetation extending over most of Europe and part of Asia. Many high-rank syntaxa regarding the central and southern Europe grasslands are currently classified under the Festuco-Brometea and several of these concern the Italian Peninsula. According to the most recent and influential checklist of the Italian vegetation, the Vegetation Prodrome of Italy by Biondi and colleagues, the Italian Festuco-Brometea grasslands are to be distributed within five orders, two suborders and eighteen alliances. The names of these syntaxa, however, are often cited incorrectly in the phytosociological literature, and some of these errors are to be found in the Vegetation Prodrome of Italy. Therefore, owing to the importance of using correct names for the stabilization of the syntaxonomic nomenclature, this paper aims to resolve these inconsistencies in following the rules of the International Code of Phytosociological Nomenclature (ICPN). As a result, 15 names are corrected, a new suborder (Bromenalia erecti) is described and six names are typified (Festucetalia Soó 1940, Stipo capillatae-Poion xerophilae Braun-Blanquet & Richard 1950, Diplachnion serotinae Braun-Blanquet 1961, Mesobrometum erecti W. Koch 1926, Festuco-Bromion erecti Barbero & Loisel 1972, Xerobromion erecti [Braun-Blanquet & Moor 1938] Zoller 1954). In addition, it is proposed that three names are to be conserved (Festucetalia valesiacae Braun-Blanquet & Tüxen ex Braun-Blanquet 1950, Festucion valesiacae Klika 1931, Mesobromion erecti [Braun-Blanquet & Moor 1938] Zoller 1954) and three to be rejected (Festucetalia Soó 1940, Festucetalia valesiacae Soó 1947, Bromion erecti W. Koch 1926). Due to the fact that the revised names are referred to in the literature with different authors’ citations, their revision is preceded by a discussion about divergent interpretations of what constitutes a ‘publication’ and the ‘date of a publication’ in the sense of article 1 of ICPN for works issued in several parts, often in relationship with a ‘sufficient diagnosis’ in the sense of article 2b. A proposal is made in this respect.
American Journal of Botany, Feb 1, 2002
X-ray microanalysis was employed to screen biogenic plant silica extracted from the aboveground t... more X-ray microanalysis was employed to screen biogenic plant silica extracted from the aboveground tissues of 20 species (Gramineae, Cyperaceae, Ericaceae, and Coniferae) occurring in subalpine and alpine grasslands, heaths, and woodlands on siliceous bedrock in the Valaisan Swiss Alps. Among the taxa investigated, only woody species produced a high proportion of phytoliths containing aluminum in the form of aluminosilicates. This difference between the chemical composition of wood and that of herbaceous phytoliths has important implications for the sourcing of phytoliths. As applications for palaeoenvironmental studies can be expected to be farreaching, the potential of this microanalytical technique is discussed.
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Papers by Jean-paul Theurillat