Pub Date : 2013-06-01DOI: 10.1080/12538078.2013.812044
Vincent Bertrin, S. Boutry, A. Dutartre, Élisabeth Lambert
Résumé Les communautés de macrophytes des lacs médocains (lac de Carcans-Hourtin et lac de Lacanau) ont fait l’objet en 2011 d’observations et de prélèvements sur la totalité de la périphérie des rives, ainsi que sur des profils perpendiculaires vers le large de ces plans d’eau. Les communautés végétales aquatiques comportent diverses espèces communes aux milieux lacustres, ainsi que des espèces patrimoniales, telles que les espèces des pelouses à littorelles, mais également des espèces exotiques à caractère envahissant. Les Characées sont bien représentées sur les lacs médocains. Chara fragifera colonise les deux tiers du linéaire des rives sur les deux lacs, jusqu’à une profondeur de 4,5 m sur le lac de Carcans-Hourtin. Nitella confervacea est moins abondante et moins fréquente, elle semble cependant coloniser les secteurs plus profonds des lacs. La répartition de ces deux espèces sur les rives des lacs est relativement homogène, les espèces n’ont pas été observées dans les secteurs d’anses protégées de vents et aux sédiments organiques fluides. Deux autres espèces de Characées, Chara globularis et Nitella translucens, sont également présentes dans ces lacs, mais d’une manière plus localisée. Le résultat de cet examen complet des rives et des prospections vers le large des lacs est cohérent avec les données disponibles dans la littérature. La présence de Chara fragifera et de Nitella confervacea dans les associations des Littorelletalia avec des Phanérogames telles que Lobelia dortmanna et Littorella uniflora, est relativement bien décrite dans ces lacs, mais aucun positionnement géographique des différentes populations de macrophytes n’avait à ce jour été effectué. De nombreuses questions liées à la gestion du niveau des eaux des lacs et à celle des espèces exotiques envahissantes (Lagarosiphon major et Egeria densa principalement) se posent pour la préservation des habitats aquatiques d’intérêt communautaire présents sur ces lacs, mais également pour ceux situés au sud du bassin d’Arcachon le long du littoral aquitain.
2011年，对medocains湖(lac de Carcans-Hourtin和lac de Lacanau)的大型植物群落进行了观测和采样，覆盖了整个河岸边缘，以及垂直于这些水体的剖面。水生植物群落包括湖泊环境中常见的各种物种，以及传统物种，如沿海草地物种，但也有外来入侵物种。这些特征在medocan湖上很有代表性。Chara fragifera占据了两个湖泊三分之二的海岸线，在Carcans-Hourtin湖深度达4.5米。Nitella confervacea的数量和频率较低，但似乎在湖泊的更深部分定居。这两种物种在湖岸的分布相对均匀，在受风保护的水道和流动的有机沉积物中没有观察到。另外两种特征，Chara globularis和Nitella translucens，也存在于这些湖泊中，但以一种更局部的方式。对湖岸和近海勘探的全面检查结果与文献中现有的数据一致。在这些湖泊中，对Littorelletalia与半边莲(Lobelia dortmanna)和Littorella uniflora等phanerogames的组合中存在的Chara fragifera和Nitella confervacea的描述比较好，但迄今为止还没有对大型植物的不同种群进行地理定位。许多管理问题和湖泊水位与外来物种(Lagarosiphon吧少校和Egeria densa)主要为了保护水生生境出现社区关心这些湖上,而且对于那些位于南面的阿基坦拱廊桥,沿着海岸线。
{"title":"Communautés de Characées des lacs médocains (Sud-Ouest de la France). Eléments d’écologie et de distribution","authors":"Vincent Bertrin, S. Boutry, A. Dutartre, Élisabeth Lambert","doi":"10.1080/12538078.2013.812044","DOIUrl":"https://doi.org/10.1080/12538078.2013.812044","url":null,"abstract":"Résumé Les communautés de macrophytes des lacs médocains (lac de Carcans-Hourtin et lac de Lacanau) ont fait l’objet en 2011 d’observations et de prélèvements sur la totalité de la périphérie des rives, ainsi que sur des profils perpendiculaires vers le large de ces plans d’eau. Les communautés végétales aquatiques comportent diverses espèces communes aux milieux lacustres, ainsi que des espèces patrimoniales, telles que les espèces des pelouses à littorelles, mais également des espèces exotiques à caractère envahissant. Les Characées sont bien représentées sur les lacs médocains. Chara fragifera colonise les deux tiers du linéaire des rives sur les deux lacs, jusqu’à une profondeur de 4,5 m sur le lac de Carcans-Hourtin. Nitella confervacea est moins abondante et moins fréquente, elle semble cependant coloniser les secteurs plus profonds des lacs. La répartition de ces deux espèces sur les rives des lacs est relativement homogène, les espèces n’ont pas été observées dans les secteurs d’anses protégées de vents et aux sédiments organiques fluides. Deux autres espèces de Characées, Chara globularis et Nitella translucens, sont également présentes dans ces lacs, mais d’une manière plus localisée. Le résultat de cet examen complet des rives et des prospections vers le large des lacs est cohérent avec les données disponibles dans la littérature. La présence de Chara fragifera et de Nitella confervacea dans les associations des Littorelletalia avec des Phanérogames telles que Lobelia dortmanna et Littorella uniflora, est relativement bien décrite dans ces lacs, mais aucun positionnement géographique des différentes populations de macrophytes n’avait à ce jour été effectué. De nombreuses questions liées à la gestion du niveau des eaux des lacs et à celle des espèces exotiques envahissantes (Lagarosiphon major et Egeria densa principalement) se posent pour la préservation des habitats aquatiques d’intérêt communautaire présents sur ces lacs, mais également pour ceux situés au sud du bassin d’Arcachon le long du littoral aquitain.","PeriodicalId":7129,"journal":{"name":"Acta Botanica Gallica","volume":"160 1","pages":"131 - 140"},"PeriodicalIF":0.0,"publicationDate":"2013-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/12538078.2013.812044","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"59705179","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-06-01DOI: 10.1080/12538078.2013.822826
K. Bociąg, Alicja E. Robionek, E. Rekowska, K. Banaś
Abstract The effect of wave-induced disturbances in the shallow littoral zone on Chara globularis individuals was studied in three populations located in three different lakes in Poland. In addition, an experiment was performed to check if the observed responses were confirmed in vegetative offspring grown ex situ. Individuals from wave-exposed sites were lighter than those from sheltered ones; they had more ramets and lateral branches. The main axes, branches, internodes and branchlets were shorter. The shortening of the main axis was a statistically significant response in each population. The reduction of biomass of thalli and shortening of branchlets under wave-exposed conditions was statistically significant only in part of the populations. The differences in underground biomass, number of branches, length of internodes and presence of holdfasts among individuals from wave-exposed and sheltered sites in the populations showed inconsistent trends between populations. This suggests a location-specific nature of some of the morphological variations. The vegetative offspring (new ramets obtained ex situ) from the fragments of individuals growing at wave-exposed sites were lighter, smaller, had shorter axes in a statistically significant way in comparison with the offspring from sheltered sites. The observed growth trend was the same as in the case of parent individuals. Hence the response noted in the parent population was confirmed in vegetative offspring. For all the remaining features, differences were more pronounced between new ramets than between parent individuals. Hence, in situ, the phenotypic responses to other environmental factors overlapped with the disturbance-related responses.
{"title":"Effect of hydrodynamic disturbances on the biomass and architecture of the freshwater macroalga Chara globularis Thuill","authors":"K. Bociąg, Alicja E. Robionek, E. Rekowska, K. Banaś","doi":"10.1080/12538078.2013.822826","DOIUrl":"https://doi.org/10.1080/12538078.2013.822826","url":null,"abstract":"Abstract The effect of wave-induced disturbances in the shallow littoral zone on Chara globularis individuals was studied in three populations located in three different lakes in Poland. In addition, an experiment was performed to check if the observed responses were confirmed in vegetative offspring grown ex situ. Individuals from wave-exposed sites were lighter than those from sheltered ones; they had more ramets and lateral branches. The main axes, branches, internodes and branchlets were shorter. The shortening of the main axis was a statistically significant response in each population. The reduction of biomass of thalli and shortening of branchlets under wave-exposed conditions was statistically significant only in part of the populations. The differences in underground biomass, number of branches, length of internodes and presence of holdfasts among individuals from wave-exposed and sheltered sites in the populations showed inconsistent trends between populations. This suggests a location-specific nature of some of the morphological variations. The vegetative offspring (new ramets obtained ex situ) from the fragments of individuals growing at wave-exposed sites were lighter, smaller, had shorter axes in a statistically significant way in comparison with the offspring from sheltered sites. The observed growth trend was the same as in the case of parent individuals. Hence the response noted in the parent population was confirmed in vegetative offspring. For all the remaining features, differences were more pronounced between new ramets than between parent individuals. Hence, in situ, the phenotypic responses to other environmental factors overlapped with the disturbance-related responses.","PeriodicalId":7129,"journal":{"name":"Acta Botanica Gallica","volume":"160 1","pages":"149 - 156"},"PeriodicalIF":0.0,"publicationDate":"2013-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/12538078.2013.822826","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"59705230","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-06-01DOI: 10.1080/12538078.2013.806872
I. Soulié-Märsche, Frédéric Triboit, M. Despréaux, Aurélie Rey-Boissezon, I. Laffont-Schwob, A. Thiéry
Abstract The paper describes the discovery of a species of genus Chara, hitherto unknown in France. The morphological features of the plants and oospores are shown and identify the plant as Chara fibrosa ssp. benthamii, a tropical taxon, non-native to the European Charophyte flora. The ecological conditions of this particular find correspond to an artificial temporary pond located in the Crau plain, north of the Camargue. In contrast to the normal hydrological cycle ruled by local precipitation during winter, the studied pond is flooded from irrigation water in late spring and during summer. This context allowed C. fibrosa to out-compete the indigenous Chara species, Chara vulgaris and Chara globularis. The accidental introduction of C. fibrosa is attributed to original contamination from rice seed material imported to the nearby Camargue, rather than to dispersal by migratory water birds. Although the species has formed a very large population in that pond within a few years, it might not be classified as “invasive” because this occurrence is linked to a particular man-made habitat. However, spread of the species in the future, as a function of global warming related to climate change, cannot be excluded.
{"title":"Evidence of Chara fibrosa Agardh ex Bruzelius, an alien species in South France","authors":"I. Soulié-Märsche, Frédéric Triboit, M. Despréaux, Aurélie Rey-Boissezon, I. Laffont-Schwob, A. Thiéry","doi":"10.1080/12538078.2013.806872","DOIUrl":"https://doi.org/10.1080/12538078.2013.806872","url":null,"abstract":"Abstract The paper describes the discovery of a species of genus Chara, hitherto unknown in France. The morphological features of the plants and oospores are shown and identify the plant as Chara fibrosa ssp. benthamii, a tropical taxon, non-native to the European Charophyte flora. The ecological conditions of this particular find correspond to an artificial temporary pond located in the Crau plain, north of the Camargue. In contrast to the normal hydrological cycle ruled by local precipitation during winter, the studied pond is flooded from irrigation water in late spring and during summer. This context allowed C. fibrosa to out-compete the indigenous Chara species, Chara vulgaris and Chara globularis. The accidental introduction of C. fibrosa is attributed to original contamination from rice seed material imported to the nearby Camargue, rather than to dispersal by migratory water birds. Although the species has formed a very large population in that pond within a few years, it might not be classified as “invasive” because this occurrence is linked to a particular man-made habitat. However, spread of the species in the future, as a function of global warming related to climate change, cannot be excluded.","PeriodicalId":7129,"journal":{"name":"Acta Botanica Gallica","volume":"160 1","pages":"157 - 163"},"PeriodicalIF":0.0,"publicationDate":"2013-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/12538078.2013.806872","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"59705139","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-06-01DOI: 10.1080/12538078.2013.823105
E. Lambert, Didier Desmots, Jean-Luc le Bail, J. Mouronval, J. Felzines
Abstract Tolypella salina R. Cor. is a Charophyte only known from some French and Iberian stations. Its rarity and the specific richness of the salt marshes where it grows, on the Atlantic and Mediterranean coasts, have led to the proposal to add this species to the French list of protected plants. A survey of stations was realized on the Atlantic coast (Noirmoutier, Guérande) between 2010 and 2013 to complete the distribution map of this taxon. The aim of this work is to improve the knowledge of this plant’s biology and its ecological environment. It appears that the development of this species differs between stations, and also from one year to the next, a phenomenon due to the instability of its living environment (hydrological and salinity conditions, etc.). Phytosociological considerations related to the subassociation tolypelletosum salinae are added. Some recommendations are proposed for the management of these sites, taking into account the human activities there, in order to maintain the salt marsh mosaic that is necessary for the conservation of Tolypella salina.
摘要:Tolypella salina R. Cor.是一种仅在法国和伊比利亚的一些站点发现的绿藻。它的稀有性和生长在大西洋和地中海沿岸的盐沼的特殊丰富性，导致了将该物种列入法国保护植物名单的提议。2010 - 2013年在大西洋沿岸(gusamrande Noirmoutier)进行了站点调查，完成了该分类群的分布图。这项工作的目的是提高对这种植物的生物学和生态环境的认识。这一物种的发展似乎在不同的站点之间有所不同，而且从一年到下一年也有所不同，这是由于其生活环境(水文和盐度条件等)的不稳定性造成的。植物社会学的考虑与相关的亚类群褐藻盐碱添加。在考虑到人类活动的情况下，对这些地点的管理提出了一些建议，以维持对保护盐藻所必需的盐沼马赛克。
{"title":"Tolypella salina R. Cor. on the French Atlantic coast: biology and ecology","authors":"E. Lambert, Didier Desmots, Jean-Luc le Bail, J. Mouronval, J. Felzines","doi":"10.1080/12538078.2013.823105","DOIUrl":"https://doi.org/10.1080/12538078.2013.823105","url":null,"abstract":"Abstract Tolypella salina R. Cor. is a Charophyte only known from some French and Iberian stations. Its rarity and the specific richness of the salt marshes where it grows, on the Atlantic and Mediterranean coasts, have led to the proposal to add this species to the French list of protected plants. A survey of stations was realized on the Atlantic coast (Noirmoutier, Guérande) between 2010 and 2013 to complete the distribution map of this taxon. The aim of this work is to improve the knowledge of this plant’s biology and its ecological environment. It appears that the development of this species differs between stations, and also from one year to the next, a phenomenon due to the instability of its living environment (hydrological and salinity conditions, etc.). Phytosociological considerations related to the subassociation tolypelletosum salinae are added. Some recommendations are proposed for the management of these sites, taking into account the human activities there, in order to maintain the salt marsh mosaic that is necessary for the conservation of Tolypella salina.","PeriodicalId":7129,"journal":{"name":"Acta Botanica Gallica","volume":"160 1","pages":"107 - 119"},"PeriodicalIF":0.0,"publicationDate":"2013-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/12538078.2013.823105","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"59705343","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-06-01DOI: 10.1080/12538078.2013.801321
Santos Cirujano Bracamonte, Natalia Guerrero Maldonado, P. G. García Murillo
Abstract This study focuses on the presence and distribution of the species of Tolypella genus in the Iberian Peninsula through a literature review and the examination of environmental, botanical and physicochemical data of the locations where T. salina, T. prolifera, T. intricata, T. hispanica and T. glomerata are settled. The shortage of herbarium material means that new collections are required to be able to conduct more detailed studies in the future, particularly on T. prolifera and T. intricata, of which the biological traits, ecology and distribution are poorly known in the Iberian Peninsula.
{"title":"The genus Tolypella (A. Braun) A. Braun in the Iberian Peninsula","authors":"Santos Cirujano Bracamonte, Natalia Guerrero Maldonado, P. G. García Murillo","doi":"10.1080/12538078.2013.801321","DOIUrl":"https://doi.org/10.1080/12538078.2013.801321","url":null,"abstract":"Abstract This study focuses on the presence and distribution of the species of Tolypella genus in the Iberian Peninsula through a literature review and the examination of environmental, botanical and physicochemical data of the locations where T. salina, T. prolifera, T. intricata, T. hispanica and T. glomerata are settled. The shortage of herbarium material means that new collections are required to be able to conduct more detailed studies in the future, particularly on T. prolifera and T. intricata, of which the biological traits, ecology and distribution are poorly known in the Iberian Peninsula.","PeriodicalId":7129,"journal":{"name":"Acta Botanica Gallica","volume":"160 1","pages":"121 - 129"},"PeriodicalIF":0.0,"publicationDate":"2013-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/12538078.2013.801321","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"59705089","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-06-01DOI: 10.1080/12538078.2013.799046
D. Delmail, M. Abasq, P. Courtel, I. Rouaud, P. Labrousse
Abstract DNA damage induced by free radicals is associated with mutation-based health impairment and cancers. The protective effect of five different extracts from an aquatic macrophyte, the alternate water-milfoil Myriophyllum alterniflorum DC (Haloragaceae), is investigated on the DNA disruption mediated by hydroxyl (HO•) and hydroperoxyl (HOO•) radicals, and their antioxidant activity on 2,2-diphenyl-1-picrylhydrazyl (DPPH) radicals and O2 •−. Indeed, M. alterniflorum is supposed to be a good candidate for DNA protection as this species was recently used in ecological surveys as a bioindicator of water quality because of its ability to cope with and to reflect the heavy-metal pollution through variations of antioxidant contents. Moreover, preliminary results indicated higher levels of scavengers specialized in reactive oxygen species reduction, than common medicinal plants. Acetone and ethanol extracts from vegetative parts limit significantly the oxidative damage of plasmid DNA induced by Fenton-reaction reactive oxygen species. The radical antioxidant activities of acetone and aqueous extracts are higher than those of other solvents: [DPPH] IC50 = 2.4 ± 0.2 mg.ml–1 and [O2 •−] AI50 = 220.0 ± 14.1 μg.ml–1, respectively. Protection towards free radicals is correlated with high contents of antioxidant compounds in acetone extracts [phenol compounds: 21.00 ± 0.69 mg gallic acid.g–1 DW (dry weight)] and aqueous extracts (flavonoids: 125.48 ± 1.26 mg rutin.g–1 DW). Myriophyllum alterniflorum can be regarded as a promising natural-product source of antigenotoxics and antioxidants and could be envisaged for therapeutic purposes.
{"title":"DNA damage protection, antioxidant and free-radical scavenging activities of Myriophyllum alterniflorum DC (Haloragaceae) vegetative parts","authors":"D. Delmail, M. Abasq, P. Courtel, I. Rouaud, P. Labrousse","doi":"10.1080/12538078.2013.799046","DOIUrl":"https://doi.org/10.1080/12538078.2013.799046","url":null,"abstract":"Abstract DNA damage induced by free radicals is associated with mutation-based health impairment and cancers. The protective effect of five different extracts from an aquatic macrophyte, the alternate water-milfoil Myriophyllum alterniflorum DC (Haloragaceae), is investigated on the DNA disruption mediated by hydroxyl (HO•) and hydroperoxyl (HOO•) radicals, and their antioxidant activity on 2,2-diphenyl-1-picrylhydrazyl (DPPH) radicals and O2 •−. Indeed, M. alterniflorum is supposed to be a good candidate for DNA protection as this species was recently used in ecological surveys as a bioindicator of water quality because of its ability to cope with and to reflect the heavy-metal pollution through variations of antioxidant contents. Moreover, preliminary results indicated higher levels of scavengers specialized in reactive oxygen species reduction, than common medicinal plants. Acetone and ethanol extracts from vegetative parts limit significantly the oxidative damage of plasmid DNA induced by Fenton-reaction reactive oxygen species. The radical antioxidant activities of acetone and aqueous extracts are higher than those of other solvents: [DPPH] IC50 = 2.4 ± 0.2 mg.ml–1 and [O2 •−] AI50 = 220.0 ± 14.1 μg.ml–1, respectively. Protection towards free radicals is correlated with high contents of antioxidant compounds in acetone extracts [phenol compounds: 21.00 ± 0.69 mg gallic acid.g–1 DW (dry weight)] and aqueous extracts (flavonoids: 125.48 ± 1.26 mg rutin.g–1 DW). Myriophyllum alterniflorum can be regarded as a promising natural-product source of antigenotoxics and antioxidants and could be envisaged for therapeutic purposes.","PeriodicalId":7129,"journal":{"name":"Acta Botanica Gallica","volume":"160 1","pages":"165 - 172"},"PeriodicalIF":0.0,"publicationDate":"2013-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/12538078.2013.799046","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"59705511","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-06-01DOI: 10.1080/12538078.2013.819294
J. Dubuisson, G. Rouhan, A. Grall, S. Hennequin, B. Senterre, K. Pynee, A. Ebihara
Abstract The diversity of species belonging to the filmy fern genus Crepidomanes (Hymenophyllaceae) in the Mascarene archipelago was studied, based on morphological investigations and focusing especially on the most dwarf species that are easily confused in the field and in herbarium collections. Morphological potential clusters and discriminations were then compared with an rbcL phylogeny. As a result, we recognized at least eight morpho-species for the archipelago and defined characters for distinguishing the three smallest ones, Crepidomanes bonapartei, Crepidomanes minutum and Crepidomanes (Trichomanes) trinerve. Morphological evidence and molecules confirm the specific status for T. trinerve (newly combined in Crepidomanes), the inclusion of Crepidomanes mannii into a C. minutum complex, and new records of C. bonapartei for Mauritius. The neotropical Polyphlebium pyxidiferum is found to be closely related to Afro-Madagascan Crepidomanes inopinatum and Crepidomanes melanotrichum species and so is newly combined in Crepidomanes. A key for the eight species of the genus in the archipelago, description of a new section clustering Crepidomanes frappieri and Crepidomanes longilabiatum, and new enhanced descriptions for two dwarf taxa (C. bonapartei and C. trinerve) are provided, and biogeographical origins of the genus in the Western Indian Ocean area are discussed.
{"title":"New insights into the systematics and evolution of the filmy fern genus Crepidomanes (Hymenophyllaceae) in the Mascarene Archipelago with a focus on dwarf species","authors":"J. Dubuisson, G. Rouhan, A. Grall, S. Hennequin, B. Senterre, K. Pynee, A. Ebihara","doi":"10.1080/12538078.2013.819294","DOIUrl":"https://doi.org/10.1080/12538078.2013.819294","url":null,"abstract":"Abstract The diversity of species belonging to the filmy fern genus Crepidomanes (Hymenophyllaceae) in the Mascarene archipelago was studied, based on morphological investigations and focusing especially on the most dwarf species that are easily confused in the field and in herbarium collections. Morphological potential clusters and discriminations were then compared with an rbcL phylogeny. As a result, we recognized at least eight morpho-species for the archipelago and defined characters for distinguishing the three smallest ones, Crepidomanes bonapartei, Crepidomanes minutum and Crepidomanes (Trichomanes) trinerve. Morphological evidence and molecules confirm the specific status for T. trinerve (newly combined in Crepidomanes), the inclusion of Crepidomanes mannii into a C. minutum complex, and new records of C. bonapartei for Mauritius. The neotropical Polyphlebium pyxidiferum is found to be closely related to Afro-Madagascan Crepidomanes inopinatum and Crepidomanes melanotrichum species and so is newly combined in Crepidomanes. A key for the eight species of the genus in the archipelago, description of a new section clustering Crepidomanes frappieri and Crepidomanes longilabiatum, and new enhanced descriptions for two dwarf taxa (C. bonapartei and C. trinerve) are provided, and biogeographical origins of the genus in the Western Indian Ocean area are discussed.","PeriodicalId":7129,"journal":{"name":"Acta Botanica Gallica","volume":"160 1","pages":"173 - 194"},"PeriodicalIF":0.0,"publicationDate":"2013-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/12538078.2013.819294","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"59705189","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-06-01DOI: 10.1080/12538078.2013.819295
J. Delay, D. Petit
Abstract Survey of the hydrophytic flora of small stretches of water in northern France has allowed the observation of several taxa of the Characeae family here reported, namely Chara vulgaris, Chara vulgaris f. longibracteata, Chara globularis, Chara curta, Nitella gracilis and Tolypella glomerata. According to current literature, 25 taxa within Characeae are present in northern France, at species, variety or form level. Chara vulgaris, as a complex, is very frequently found in northern France in newly created stretches of water. It colonizes meso-eutrophic waters and shows a cosmopolitan distribution. The type species seems to be rarer locally than the longibracteata form, but more investigations are needed to confirm this observation. Chara globularis has been recorded on the coastline of northern France, in the peat bogs at the back of the coastline, in the humid dune slacks and further inland where the plant can survive winter, in some mining slag ponds in the area of Valenciennes, the water of which has been qualified as sub-briny. Nitella gracilis in the area is perceived as a meso-eutrophic to oligo-mesotrophic water species, although in Brittany and Germany its presence has been noted in acidophilous communities together with Potamogeton polygonifolius, Littorella uniflora or Sphagnum spp. The species is mostly present in western France, and is very rare in eastern France. Tolypella glomerata has been very rarely observed in northern France. The observation here reported in a small pond on the hill of Marchenelles is only the third report in the area. The species is not expressed there as a monospecific community (as usually reported) and must be searched for within a very dense Chara vulgaris var. longibreactata cover that develops in early spring. To facilitate the identification of these plants in the field, an illustrated description of each taxa identified has been provided.
摘要对法国北部小片水域的水生植物区系进行了调查，发现了本报告所述的Chara vulgaris、Chara vulgaris f. long bracteata、Chara globullaris、Chara curta、Nitella gracilis和Tolypella glomerata等Chara科植物类群。根据目前的文献，在法国北部，在种、变种或形态水平上，有25个属characterae的分类群。Chara vulgaris，作为一个综合体，经常在法国北部新形成的水域中发现。它在中富营养化水域定居，并呈现世界性分布。模式种似乎在当地比长苞片形式更罕见，但需要更多的调查来证实这一观察结果。在法国北部的海岸线上，在海岸线后面的泥炭沼泽，在潮湿的沙丘洼地和更远的内陆地区，在瓦朗谢讷地区的一些采矿渣池中都有记录，这些池塘的水已被合格为亚咸水。该地区的Nitella gracilis被认为是中富营养化到低中富营养化的水生物种，尽管在布列塔尼和德国，它与Potamogeton polygonifolius、Littorella uniflora或Sphagnum spp一起存在于嗜酸群落中。该物种主要存在于法国西部，在法国东部非常罕见。在法国北部很少观察到肾小球滴虫。在马舍内尔山上的一个小池塘里观察到的报告只是该地区的第三个报告。该物种不像通常报道的那样是单一的群落，必须在早春发育的非常密集的Chara vulgaris var. longgibreactata覆盖层中寻找。为了便于在野外鉴定这些植物，对鉴定的每个分类群都作了图解说明。
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Pub Date : 2013-03-01DOI: 10.1080/12538078.2013.772498
Bruno de Foucault, Marc El Beyrouthy, N. Arnold-Apostolidès
Résumé Nous présentons ici le résultat des investigations phytosociologiques menées dans la partie centrale du Liban ; notamment nous décrivons les syntaxons nouveaux suivants : Querco infectoriae – Pinetum pineae, Pistacio palaestinae – Cytisetum lanigeri, Sarcopoterio spinosi – Cistetum salviifolii, Salici acmophyllae – Hypericetum hircini, et Mentho microphyllae – Dorycnietum recti. La composition floristique et la structure de ces syntaxons ont été définies en utilisant l’approche synusiale de l'étude de la végétation. Des comparaisons avec ce qui est connu dans les pays voisins sont présentées.
{"title":"Résultats d’investigations phytosociologiques récentes au Liban central","authors":"Bruno de Foucault, Marc El Beyrouthy, N. Arnold-Apostolidès","doi":"10.1080/12538078.2013.772498","DOIUrl":"https://doi.org/10.1080/12538078.2013.772498","url":null,"abstract":"Résumé Nous présentons ici le résultat des investigations phytosociologiques menées dans la partie centrale du Liban ; notamment nous décrivons les syntaxons nouveaux suivants : Querco infectoriae – Pinetum pineae, Pistacio palaestinae – Cytisetum lanigeri, Sarcopoterio spinosi – Cistetum salviifolii, Salici acmophyllae – Hypericetum hircini, et Mentho microphyllae – Dorycnietum recti. La composition floristique et la structure de ces syntaxons ont été définies en utilisant l’approche synusiale de l'étude de la végétation. Des comparaisons avec ce qui est connu dans les pays voisins sont présentées.","PeriodicalId":7129,"journal":{"name":"Acta Botanica Gallica","volume":"110 1","pages":"65 - 75"},"PeriodicalIF":0.0,"publicationDate":"2013-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/12538078.2013.772498","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"59704837","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2013-03-01DOI: 10.1080/12538078.2013.773462
Z. Liu, Qian Ru Zhao, Jing Zhou
Abstract DNA barcoding has been widely used as a tool for species discrimination in closely related plants and at more coarse taxonomic levels, but there have been few reports of such a tool being applied to taxa in “morphological stasis”. In this study, we test the performance of core barcodes (rbcL and matK) and two additional candidate barcodes [psbA-trnH and nuclear ribosomal internal transcribed spacer (ITS)] for the widely distributed, northern temperate monophyletic genus Chimaphila, which exhibits morphological conservatism. In addition to ITS, slowly evolving rbcL and matK independently demonstrate a high resolving ability among Chimaphila species, indicative of the old age of disjunction. We tentatively attribute morphological stasis in Chimaphila to convergence under similar habitat conditions and complex, stable relationships with surrounding autotrophic trees via common mycorrhizal symbioses.
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