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384 results for “Heracleum”
Heracleum maximum (Apiaceae) - stem - showing leaf bases
Image of Heracleum maximum (Apiaceae) - stem - showing leaf bases
Heracleum maximum (Apiaceae) - leaf - margin of upper + lower surface
Image of Heracleum maximum (Apiaceae) - leaf - margin of upper + lower surface
Heracleum maximum (Apiaceae) - inflorescence - lateral view of flower
Image of Heracleum maximum (Apiaceae) - inflorescence - lateral view of flower
Heracleum maximum (Apiaceae) - inflorescence - lateral view of flower
Image of Heracleum maximum (Apiaceae) - inflorescence - lateral view of flower
Heracleum maximum (Apiaceae) - inflorescence - frontal view of flower
Image of Heracleum maximum (Apiaceae) - inflorescence - frontal view of flower
Heracleum maximum (Apiaceae) - inflorescence - frontal view of flower
Image of Heracleum maximum (Apiaceae) - inflorescence - frontal view of flower
Heracleum maximum (Apiaceae) - inflorescence - frontal view of flower
Image of Heracleum maximum (Apiaceae) - inflorescence - frontal view of flower
Heracleum maximum (Apiaceae) - inflorescence - whole - unspecified
Image of Heracleum maximum (Apiaceae) - inflorescence - whole - unspecified
Heracleum maximum (Apiaceae) - whole plant - in flower - general view
Image of Heracleum maximum (Apiaceae) - whole plant - in flower - general view
Heracleum maximum (Apiaceae) - whole plant - in flower - general view
Image of Heracleum maximum (Apiaceae) - whole plant - in flower - general view
Heracleum maximum (Apiaceae) - stem - showing leaf bases
Image of Heracleum maximum (Apiaceae) - stem - showing leaf bases
Heracleum maximum (Apiaceae) - inflorescence - whole - unspecified
Image of Heracleum maximum (Apiaceae) - inflorescence - whole - unspecified
Heracleum maximum (Apiaceae) - leaf - margin of upper + lower surface
Image of Heracleum maximum (Apiaceae) - leaf - margin of upper + lower surface
Distribution of Heracleum sosnowskyi in Syktyvkar city. Vector (polygon) dataset in shapefile.
<p>Dataset contain the borders of Heracleum sosnowskyi stands in Syktyvkar city, Komi Republic, Russia (61.669081º N, 50.822498º E). The dataset was prepared by hand recognition of sattelite images. Field verification was performed with geotagged photos from RIVR system (https://ib.komisc.ru/add/rivr/en).</p> <p>Spatial Reference System: +proj=utm +zone=39 +datum=WGS84 +units=m +no_defs (EPSG: 32639)</p> <p>Extents in spatial reference system units: xMin,yMin 482975.07,6832549.56 : xMax,yMax 494553.23,6857424.73<br> </p>
Contracts for the eradication of plants of the hogweed (Heracleum sosnowskyi Manden.) in Russia from 2011 to 2017.
<p>Contracts for the eradication of hogweed (<em>Heracleum sosnowskyi </em>Manden.) plants in Russia from 2011 to 2017 are described. Data on the cost of contracts, site areas, mowing, herbicide use, mapping were obtained at http://zakupki.gov.ru</p>
Freezing point of water, water content and proportion of freezing water in Heracleum sosnowskyi plants
<p><strong>Method plant tissue of analysis using differential scanning calorimetry (DSC)</strong></p> <p>Differential scanning calorimetry was used to assess the risk of tissue plant damage by low negative temperatures. We measured the freezing point of water, the water content and the proportion of freezing water in plant samples using the DSC – 60 Shimadzu calorimeter (Japan). The samples were buds and seeds of <em>Heracleum sosnowskyi</em> (hogweed) plants. The samples were placed in an aluminum pan with a volume of 0.1 cm<sup>3</sup>. The sample was cooled at a rate of 1 °C/min from +5 °C to -30 °C. The water crystallization temperature was determined at the beginning of the phase transition peak. After measurements, the material was dried at 105 °C to a constant dry mass.</p> <p>The following calculations were applied:</p> <ol> <li>A – DSC data (water crystallization temperature, ºC);</li> <li>B – wet weight sample (mg);</li> <li>C – dry weight sample (mg);</li> <li>D = B-C – (water content in sample, mg);</li> <li>E – DSC data (heat from water freezing, mJ);</li> <li>F= E× 335 – (frozen water in sample, mg);</li> <li>335 –The heat of frozen for wateris approximately (mJ/mg);</li> <li>G = D-F – (non-freezing water, mg);</li> <li>H = (100%/D) × F – (frozen water in sample, %);</li> <li>I = (D/B) ×100 – (water content in sample, %);</li> <li>J= D/C (mg H<sub>2</sub>O/mg dry weight sample).</li> </ol> <p> The results of the analysis are presented in the file «The_results_DSC_analysis_of_buds_seeds.xls».</p> <p>Measurements were carried out in September 2018. The samples were buds and seeds of <em>Heracleum sosnowskyi</em> (hogweed) plants. Geographical coordinates vegetation plants 61.645333, 50.733196.</p>
Freezing point of water, water content and proportion of freezing water in Heracleum sosnowskyi seedlings with radicles
<p><strong>Method plant tissue of analysis using differential scanning calorimetry (DSC)</strong></p> <p>Differential scanning calorimetry was used to assess the risk of tissue plant damage by low negative temperatures. We measured the freezing point of water, the water content and the proportion of freezing water in plant samples using the DSC – 60 Shimadzu calorimeter (Japan). The samples were seedlings with radicles of <em>Heracleum sosnowskyi</em> (hogweed) plants from under snow. The samples were placed in an aluminum pan with a volume of 0.1 cm<sup>3</sup>. The sample was cooled at a rate of 1 °C/min from +5 °C to -30 °C. The water crystallization temperature was determined at the beginning of the phase transition peak. After measurements, the material was dried at 105 °C to a constant dry mass.</p> <p>The following calculations were applied:</p> <ol> <li>A – DSC data (water crystallization temperature, ºC);</li> <li>B – wet weight sample (mg);</li> <li>C – dry weight sample (mg);</li> <li>D = B-C – (water content in sample, mg);</li> <li>E – DSC data (heat from water freezing, mJ);</li> <li>F= E× 335 – (frozen water in sample, mg);</li> <li>335 –The heat of frozen for water is approximately (mJ/mg);</li> <li>G = D-F – (non-freezing water, mg);</li> <li>H = (100%/D) × F – (frozen water in sample, %);</li> <li>I = (D/B) ×100 – (water content in sample, %);</li> <li>J= D/C (mg H<sub>2</sub>O/mg dry weight sample).</li> </ol> <p> </p> <p>The results of the analysis are presented in the file «The_results_DSC_analysis_of_seedlings_Heracl_sosn_2017.xls».</p> <p>Measurements were carried out in March 2017. The samples were seedlings with radicles of <em>Heracleum sosnowskyi</em> (hogweed) plants from under snow. Geographical coordinates vegetation plants 61.645333, 50.733196.</p>
Additional climate information for research paper «Ecological and Geographical Analysis of Distribution of Heracleum persicum, H. mantegazzianum and H. sosnowskyi on The Northern Limit of Its Invaded Range in Europe» submitted to Russian Journal of Biological Invasions
<p><strong>Additional climate information for research paper «Ecological and Geographical Analysis of Distribution of Heracleum persicum, H. mantegazzianum and H. sosnowskyi on The Northern Limit of Its Invaded Range in Europe» submitted to Russian Journal of Biological Invasions </strong></p>
Ballistic and anemochoric properties of Heracleum sosnowskyi seeds
<p>Баллистические и анемохорные показатели семян Heracleum sosnowskyi.<br> Растительная диаспора, собранная в Сыктывкаре с 5 по 13 октября 2019 <br> г. Сбор семян осуществлялся в четырех точках: ул. Петрозаводская., 120 (га, <br> гг); ул. Колчева., 23 (ТН); ул. Карла Маркса, д., d. 145 (SJ); припаркуйтесь к ним.<br> Киров (СВ).</p> <p>Сбор данных осуществлялся студентами Сыктывкарского государственного университета имени Питирима Сорокина: Газизовой Ольгой, Голке Григорием, Гориновой Анастасией, Васильевым Александром, Серебряковой Валерией, Смотриной Юлией, Турьевой Евой Натальей.</p>
Data from: Reconstructing the invasion history of Heracleum persicum (Apiaceae) into Europe
Sparse, incomplete and inappropriate historical records of invasive species often hamper invasive species management interventions. Population genetic analyses of invaders might provide a suitable context for the identification of their source populations and possible introduction routes. Here, we describe the population genetics of Heracleum persicum Desf. ex Fisch and trace its route of introduction into Europe. Microsatellite markers revealed a significantly higher genetic diversity of H. persicum in its native range, and the loss of diversity in the introduced range may be attributed to a recent genetic bottleneck. Bayesian cluster analysis on regional levels identified three and two genetic clusters in the native and the introduced ranges, respectively. A global structure analysis revealed two worldwide distinct genetic groups: one primarily in Iran and Denmark, the other primarily in Norway. There were also varying degrees of admixture in England, Sweden, Finland and Latvia. Approximate Bayesian computation indicated two independent introductions of H. persicum from Iran to Europe: the first one in Denmark and the second one in England. Finland was subsequently colonized by English populations. In contrast to the contemporary hypothesis of English origin of Norwegian populations, we found Finland to be a more likely source for Norwegian populations, a scenario supported by higher estimated historical migration from Finland to Norway. Genetic diversity per se is not a primary determinant of invasiveness in H. persicum. Our results indicate that, due to either pre-adaptations or rapid local adaptations, introduced populations may have acquired invasiveness after subsequent introductions, once a suitable environment was encountered.
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