Darwiniana最新文献_第7页

ESTUDIO TAXONÓMICO DEL GÉNERO DYSCHORISTE (ACANTHACEAE) EN LA ARGENTINA 阿根廷棘科的分类学研究

Darwiniana Pub Date : 2014-12-31 DOI: 10.14522/DARWINIANA.2014.22.606

C. Ezcurra

引用次数: 2

Estudios en el género Cortaderia (Poaceae). I. Sistemática y nomenclatura de la sect. Cortaderia Cortaderia属(禾本科)的研究。一、Cortaderia的系统和命名

Darwiniana Pub Date : 2014-12-31 DOI: 10.14522/DARWINIANA.2014.22.591

Daniel Testoni, C. B. Villamil

{"title":"Estudios en el género Cortaderia (Poaceae). I. Sistemática y nomenclatura de la sect. Cortaderia","authors":"Daniel Testoni, C. B. Villamil","doi":"10.14522/DARWINIANA.2014.22.591","DOIUrl":"https://doi.org/10.14522/DARWINIANA.2014.22.591","url":null,"abstract":"The genus Cortaderia (Poaceae) includes 19 South American species, separated into four sections. In this paper the species included in sect. Cortaderia are studied. Cortaderia rudiuscula and C. jubata are two names used with different criteria by diverse authors, which has generated confusion and has led to the frequent determination of herbarium specimens as different species of the section. The original description of C. rudiuscula was written on the basis of four syntypes which belong to more than one species. In this contribution we analyzed type specimens and other herbarium materials assigned to C. rudiuscula, apart from additional plants collected in population samplings for this work, and specimens of the remaining species of the section. A Principal Components Analysis (PCA) was conducted on the basis of characters traditionally used to delimit the species of the section. The analysis showed three morphologic discreet groups that fit to C. araucana, C. selloana and C. speciosa. The lectotype of C. rudiuscula was located among the specimens of C. speciosa, and therefore the synonymy of both species is here proposed. A similar analysis showed that C. jubata represents only a portion of the morphologic variability of C. selloana, and the new combination C. selloana subsp. jubata is proposed. The names C. quila and C. quila var. pygmaeum are reduced to the synonymy of C. speciosa. Cortaderia araucana and C. selloana were originally described as dioecious, and later as gynodioecious. In this paper, populations composed of only pistillate plants (apomyctic) are reported for both species, and, consequently, descriptions are amended to include apomictic populations. A key for the four taxa that are here recognized for the sect. Cortaderia is included, together with descriptions, synonymies and distribution maps.","PeriodicalId":39378,"journal":{"name":"Darwiniana","volume":"04 1","pages":"260-276"},"PeriodicalIF":0.0,"publicationDate":"2014-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81410233","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}

引用次数: 5

DELIMITACIÓN DE LAS ESPECIES ARGENTINAS DEL GENERO INGA (MIMOSOIDEAE) MEDIANTE TÉCNICAS NUMÉRICAS

Darwiniana Pub Date : 2014-12-31 DOI: 10.14522/DARWINIANA.2014.22.614

M. A. Zapater, P. S. Hoc, E. C. Lozano, S. Sühring

引用次数: 1

NEW RECORDS OF GEASTRACEAE (BASIDIOMYCOTA: PHALLOMYCETIDAE) FROM ATLANTIC RAINFOREST REMNANTS AND RELICTS OF NORTHEASTERN BRAZIL 巴西东北部大西洋雨林遗迹和遗留物中担子菌科新记录(担子菌科:伞菌科)

Darwiniana Pub Date : 2014-12-31 DOI: 10.14522/DARWINIANA.2014.22.595

J. O. Sousa, B. D. Silva, D. S. Alfredo, I. G. Baseia

{"title":"NEW RECORDS OF GEASTRACEAE (BASIDIOMYCOTA: PHALLOMYCETIDAE) FROM ATLANTIC RAINFOREST REMNANTS AND RELICTS OF NORTHEASTERN BRAZIL","authors":"J. O. Sousa, B. D. Silva, D. S. Alfredo, I. G. Baseia","doi":"10.14522/DARWINIANA.2014.22.595","DOIUrl":"https://doi.org/10.14522/DARWINIANA.2014.22.595","url":null,"abstract":"Sousa, J. O.; B. D. B. Silva; D. S. Alfredo & I. G. Baseia. 2014. New records of Geastraceae (Basidiomy- cota, Phallomycetidae) from Atlantic Rainforest remnants and relicts of Northeastern Brazil. Darwiniana, nueva serie 2(2): 207-221. This work presents records of Geastraceae for northeastern Brazil, collected in remnants of the Atlan- tic Rainforest and Atlantic Rainforest relicts \"Brejo de Altitude\". The species were identified based on macro- and micromorphology with the aid of specific literature. Eleven species of the family are distrib- uted into two genera: Geastrum fimbriatum, G. javanicum, G. lageniforme, G. lloydianum, G. minimum, G. pectinatum, G. rusticum, G. schweinitzii, G. setiferum, G. triplex, and Myriostoma coliforme. Nine of these records are new for Rio Grande do Norte state, five for Paraiba and five for Ceara. Geastrum minimum is the first record for Northeastern Brazil; G. rusticum is the first report for the semiarid region, while G. pectinatum and M. coliforme are the first records for the Northeastern Atlantic rainforest and \"Brejo de Altitude\" vegetation. We also provide observations, habitat, and species distribution in Brazil.","PeriodicalId":39378,"journal":{"name":"Darwiniana","volume":"114 1","pages":"207-221"},"PeriodicalIF":0.0,"publicationDate":"2014-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76238261","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}

引用次数: 15

Prunella Laciniata (Lamiaceae), nueva cita para la flora argentina 唇形科Prunella Laciniata，阿根廷植物群的新引用

Darwiniana Pub Date : 2014-12-31 DOI: 10.14522/DARWINIANA.2014.22.613

C. D. Torres, J. Puntieri

引用次数: 0

MICROFUNGAL COMPOSITION IN AN ASTELIA-DONATIA CUSHION PEATLAND IN TIERRA DEL FUEGO, ARGENTINA 在阿根廷火地岛的一个星形藓垫泥炭地的微真菌组成

Darwiniana Pub Date : 2014-07-31 DOI: 10.14522/DARWINIANA.2014.21.566

Noelia Paredes, V. F. Consolo, V. Pancotto, C. Fritz, M. Barrera, A. Arambarri, G. Salerno

引用次数: 2

PATRONES DE DEPÓSITO DE POLEN SOBRE EL CUERPO DE LOS POLINIZADORES EN COMUNIDADES ESFINGÓFILAS DE ARGENTINA SUBTROPICAL 阿根廷亚热带鞘蝇群落传粉者身上花粉沉积的模式

Darwiniana Pub Date : 2014-07-31 DOI: 10.14522/DARWINIANA.2014.21.568

Marcela Moré, Santiago Benitez-Vieyra, Alicia N. Sérsic, Andrea A. Cocucci

{"title":"PATRONES DE DEPÓSITO DE POLEN SOBRE EL CUERPO DE LOS POLINIZADORES EN COMUNIDADES ESFINGÓFILAS DE ARGENTINA SUBTROPICAL","authors":"Marcela Moré, Santiago Benitez-Vieyra, Alicia N. Sérsic, Andrea A. Cocucci","doi":"10.14522/DARWINIANA.2014.21.568","DOIUrl":"https://doi.org/10.14522/DARWINIANA.2014.21.568","url":null,"abstract":"More, M.; S. Benitez-Vieyra, A. N. Sersic & A. A. Cocucci. 2014. Pollen deposition patterns onto the pollinators' body in sphingophilous communities of subtropical Argentina. Darwiniana, nueva serie 2(1): 174-196. Plant species that coexist and share pollinators may experience inter-specific competition for pollina- tor service or interference of improper pollen. To avoid the latter, plant species may use different areas of the pollinatorsbody to deposit their pollen, either by different floral architectures or by different floral lengths. We evaluate here the existence of this pattern of differential use of body areas of pollinators in 33 sphingophilous communities of subtropical Argentina. We use null models to evaluate if the plants deposit the pollen overdispersed relative to what would be expected by chance either in different body parts or at different heights in the proboscis of hawkmoth pollinators. We found that 42 native plants species are pollinated by hawkmoths in subtropical Argentina. We observed a significant and positive correlation between the operative length -i.e. the distance between anthers and stigma from nectar- of the flowers and the mean length of the proboscis of hawkmoth pollinators. However, both the average di- versity of pollen deposition sites and the average difference of operative length between sphingophilous plant species present in the same community were not significantly different than expected under a null model. When analyzing the results in individual communities, nine communities showed a diversity of pollen deposition sites significantly higher than expected by chance and two communities showed a di- fference in the operative length greater than expected by chance. These results suggest that other factors such as the degree of generalization in pollination, phenology and / or the use of distinctive floral signals may be avoiding competition for pollinators between coexisting plants species.","PeriodicalId":39378,"journal":{"name":"Darwiniana","volume":"30 1","pages":"174-196"},"PeriodicalIF":0.0,"publicationDate":"2014-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84420176","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}

引用次数: 7

LAS COMUNIDADES VEGETALES DE LA SABANA DEL PARQUE NACIONAL EL PALMAR (ARGENTINA) EL PALMAR国家公园大草原的植物群落(阿根廷)

Darwiniana Pub Date : 2014-07-31 DOI: 10.14522/DARWINIANA.2014.21.569

W. B. Batista, Andrés G. Rolhauser, Fernando Biganzoli, S. Burkart, Liliana Goveto, A. Maranta, A. Pignataro, Natalia S. Morandeira, M. Rabadán

{"title":"LAS COMUNIDADES VEGETALES DE LA SABANA DEL PARQUE NACIONAL EL PALMAR (ARGENTINA)","authors":"W. B. Batista, Andrés G. Rolhauser, Fernando Biganzoli, S. Burkart, Liliana Goveto, A. Maranta, A. Pignataro, Natalia S. Morandeira, M. Rabadán","doi":"10.14522/DARWINIANA.2014.21.569","DOIUrl":"https://doi.org/10.14522/DARWINIANA.2014.21.569","url":null,"abstract":"Since 1965, El Palmar National Park, Entre Rios, protects the largest remnant of Butia yatay palm savanna, a species-rich ecosystem threatened by human activity. To study the functioning of this ecosystem and to manage its preservation, it is necessary to have an adequate picture of its vegetation heterogeneity. In this paper, we present a phytosociological classification of the plant communities of this savanna, describe their structure, species composition and richness, and provide their distribution in the landscape. To stratify our data acquisition, we first mapped the major geomorphic units in this landscape. In the spring of 1999 and the following summer, we conducted complete inventories of plant species in 73 savanna stands with different fire histories distributed throughout the different geomorphic units. We used multivariate analysis and numerical classification techniques to group inventories in plant community types and species in floristic groups. Finally, we summarized the compositional differences among community types as a metric multidimensional scaling ordination. We defined seven community types, recognizable by combinations of 20 floristic groups. The pattern of similarities among these community types suggests that floristic heterogeneity is organized along two gradients, one associated with soil texture differences, and the other with differences in water input. Three of the community types, closely related to each other, are distributed on elevated fluvial terraces and interfluves, in correspondence with gradual differences in topography and soil. These community types undergo successional change due to woody encroachment triggered by cattle exclusion and maintained by scarcity of natural fires. The remaining four community types are strictly associated with rocky outcrops, sand deposits, or runoff pathways that interrupt the landscape matrix, with no apparent woody encroachment.","PeriodicalId":39378,"journal":{"name":"Darwiniana","volume":"58 1","pages":"5-38"},"PeriodicalIF":0.0,"publicationDate":"2014-07-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90258389","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}

引用次数: 24

New record and additions to the argentinean bryophyte flora 阿根廷苔藓植物区系的新记录和补充

Darwiniana Pub Date : 2014-07-31 DOI: 10.14522/DARWINIANA.2014.21.571

E. Fuertes, C. Prada

引用次数: 4

LA EXPLOTACIÓN DE LOS RECURSOS VEGETALES EN SOCIEDADES CAZADORAS-RECOLECTORAS DEL SUR DE MENDOZA, ARGENTINA 阿根廷门多萨南部狩猎采集社会对植物资源的开发

Darwiniana Pub Date : 2014-07-31 DOI: 10.14522/DARWINIANA.2014.21.549

C. Llano

引用次数: 10