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220 results for “Phragmites australis”
Phragmites australis (Cav.) Trin. ex Steud. (BR0000012078776)
Belgium Herbarium image of <a href="https://www.plantentuinmeise.be">Meise Botanic Garden</a>.
Phragmites australis (Cav.) Trin. ex Steud. (BR0000012209545)
Belgium Herbarium image of <a href="https://www.plantentuinmeise.be">Meise Botanic Garden</a>.
Phragmites australis (Cav.) Trin. ex Steud. (BR0000011586111)
Belgium Herbarium image of <a href="https://www.plantentuinmeise.be">Meise Botanic Garden</a>.
Phragmites australis (Cav.) Trin. ex Steud. (BR0000011585848)
Belgium Herbarium image of <a href="https://www.plantentuinmeise.be">Meise Botanic Garden</a>.
Phragmites australis (Poaceae) - stem - showing leaf bases
Image of Phragmites australis (Poaceae) - stem - showing leaf bases
Phragmites australis (Poaceae) - leaf - basal or on lower stem
Image of Phragmites australis (Poaceae) - leaf - basal or on lower stem
Phragmites australis (Poaceae) - inflorescence - whole - unspecified
Image of Phragmites australis (Poaceae) - inflorescence - whole - unspecified
Phragmites australis (Poaceae) - whole plant - in flower - general view
Image of Phragmites australis (Poaceae) - whole plant - in flower - general view
Phragmites australis (Poaceae) - inflorescence - whole - unspecified
Image of Phragmites australis (Poaceae) - inflorescence - whole - unspecified
Phragmites australis (Poaceae) - inflorescence - whole - unspecified
Image of Phragmites australis (Poaceae) - inflorescence - whole - unspecified
Does European-introduced Phragmites australis experience below-ground microbial enemy release in North America?
<p>Escape from native range enemies can give invasive species a competitive edge according to the enemy-release hypothesis. While more commonly associated with predators and herbivores, release from belowground microbial antagonists has been recently demonstrated to benefit invasive plants. Biogeographic variation in dominance and comparisons of soil communities suggest that invasive European <em>Phragmites australis</em> may have also benefitted from belowground enemy release in North America. Here we examine the effects of native range (Europe) versus introduced range (North America) soil communities on European native and North American introduced<em> P. australis</em> using a reciprocal inoculation seedling growth experiment. Contrary to the enemy-release hypothesis, we found that North American-introduced <em>P. australis</em> was sensitive to soil community origin in that the seedlings grown in European soil communities (native) had higher total biomass than seedlings grown in North American soil communities (introduced). This pattern was not observed in the European native <em>P. australis</em> seedlings which had similar biomass when grown with North American or European soil communities. Notably, introduced <em>P. australis</em> had higher biomass than native <em>P. australis</em> regardless of which soil community it was grown in, suggesting a growth-defense tradeoff. Though the relative abundance of mutualists and pathogens composition did not differ between the two ranges, an indicator analysis revealed that mutualistic fungi and bacteria were key components of European soil communities but not in North American communities. Interestingly, North American soil communities had lower β-diversity than European communities suggesting higher levels of community conservation amongst North American populations. This research represents the first evidence of growth-defense trade-offs in introduced <em>P. australis</em> and offers a novel mechanism for understanding the invasion of <em>P. australis</em> in North America.</p>
Figs 17–24. C in The Morphology Of Adults Of Cryptonevra Lioy, 1864 Species (Diptera, Chloropidae) Occurring On The Common Reed (Phragmites Australis)
Figs 17–24. C. diadema. Epandrium: 17 = posterior view, 18 = anterior view, 19 = anterior lobe, antero-ventral view, 20 = ventral view; Hypandrium and phallic complex: 21 = frontal view, 22 =
Figs 9–16. C in The Morphology Of Adults Of Cryptonevra Lioy, 1864 Species (Diptera, Chloropidae) Occurring On The Common Reed (Phragmites Australis)
Figs 9–16. C. nigritarsis. Epandrium: 9 = posterior view, 10 = anterior view, 11 = anterior lobe, antero-ventral view, 12 = ventral view; Hypandrium and phallic complex: 13 = frontal view, 14 =
Figs 1–8. C in The Morphology Of Adults Of Cryptonevra Lioy, 1864 Species (Diptera, Chloropidae) Occurring On The Common Reed (Phragmites Australis)
Figs 1–8. C. flavitarsis. Epandrium: 1 = posterior view, 2 = anterior view, 3 = anterior lobe, antero-ventral view, 4 = ventral view; Hypandrium and phallic complex: 5 = frontal view, 6 = phal-
Does European-introduced Phragmites australis experience below-ground microbial enemy release in North America?
Open the record for dataset details and reuse information.
Fig. 5 in Chalcidoidea (Hymenoptera) obtained from common reed, Phragmites australis (Cav.) Trin. ex Steud. (Poaceae) in Iran with new records and descriptions of two new species
Fig. 5. Neococcidencyrtus poutiersi (Mercet, 1922), ♀. A. Lateral view. B. Dorsal view. C. Antenna.
Intraspecific variation and economics spectrum of Phragmites australis in lakeshore wetland of (semi-) arid regions
<p><em>Phragmites australis</em>, as a widely distributed species, has a high degree of intraspecific variation in functional traits and is able to respond to external climatic and environmental changes and adjust its adaptation strategies on time. The plant economic spectrum can reflect the adaptation strategies of resource acquisition and storage of plants in different climatic regions, and provide a scientific basis for understanding the ecological differentiation of plants in different habitats and their adaptation mechanisms. In this study, the morphological traits, nutrient contents and stoichiometric ratios of <em>P. australis</em> in lakes and lakeshore wetlands of semi-arid and arid climatic regions from east to west in Inner Mongolia Plateau were investigated to reveal the variability of plant functional traits at different regional scales and the influencing factors, and to reveal the ecological adaptation strategies of <em>P. australis</em> in different regions through plant economic spectrum. The results showed that soil moisture gradient, geographic location and regional scale effected the intraspecific variation of functional traits of <em>P. australis</em>. At the local scale, soil moisture gradients had opposite effects on the response to functional traits of <em>P. australis</em> in the arid and semi-arid regions. At the regional scale, climatic factors dominated the variation of reed functional traits across the latitudinal gradient, while the correlation with soil properties was not significant (<em>P</em> > 0.05). Plant economic spectrum theory is also applicable to the functional traits of various organs and whole plants of <em>P. australis</em> populations at different regional scales, and the acquisition and assimilation of resources is conservative in arid regions, while in semi-arid regions it is an acquisition strategy. This study provides a new understanding of the ecological niche differentiation and drivers of plant populations and ecological adaptation strategies of species at the regional scale, and provides a theoretical basis for the restoration and reconstruction of degraded wetland ecosystems.</p>
Online Resources Chapter 3 - Decomposition of standing litter biomass in newly constructed wetlands associated with direct effects of sediment and water characteristics and the composition and activity of the decomposer community using Phragmites australis as a single standard substrate
<p>Online Resources to Chapter 3 "Decomposition of standing litter biomass in newly constructed wetlands associated with direct effects of sediment and water characteristics and the composition and activity of the decomposer community using Phragmites australis as a single standard substrate" of PhD thesis from Ciska Overbeek, "Peat formation on a former landfill - Production and decomposition of aquatic pioneer vegetation". </p> <p>Published by Overbeek et al in 2019 in Wetlands 39(1): 113-125. https://doi.org/10.1007/s13157-018-1081-y. </p>
Data for deJonge et al. - Characterizing an invasion assemblage: first comparison of insect communities on native and introduced subspecies of Phragmites australis in Ontario, Canada
<p>Data for deJonge et al. publication "Characterizing an invasion assemblage: first comparison of insect communities on native and introduced subspecies of <em>Phragmites australis </em>in Ontario, Canada". Data are produced from a 2016-2017 survey of 28 geographically paired sites across Ontario, Canada containing introduced <em>Phragmites australis </em>ssp. <em>australis </em>or native <em>Phragmites australis </em>ssp. <em>americanus</em>. The dataset includes for each site basic descriptions of site characteristics (e.g., latitude, stem density), the stem attack rate (% of live stems containing at least one insect) of fourteen insect taxa, and alpha-diversity indices calculated from the attack rates ("FullSiteData" tab). It also includes basic presence and absence data for each taxon across the fourteen sites of each subspecies ("Presence-AbsenceData" tab), and paired differences between native and introduced sites in alpha- and beta-diversity indices, and stem attack rates by taxon ("PairedData(Native-Introduced)" tab).</p>
High Resolution Phragmites Australis Classification in Delaware Estuaries
<p>This dataset provides a high resolution (1-m) land cover map for Estuarine wetlands in the State of Delaware in the United States of America during the summer of 2017. This dataset was created to identify populations of the invasive marsh species <em>Phragmites australis</em>.</p> <p><strong>Input data:</strong></p> <p>This classification is derived from National Agriculture Imagery Program (NAIP) 1-m aerial imagery captured in the State of Delaware during June of 2017. NAIP imagery includes a blue, green, red, and near infrared band. To improve classification accuracy, a Normalized Difference Vegetation Index (NDVI) was calculated from NAIP imagery using the near infrared and red bands. A principal component analysis (PCA) was used on the four NAIP bands and the NDVI band to create five new PCA bands. The five PCA bands were used as input into a random forest classification.</p> <p>NDVI = (Near infrared - Red) / (Near infrared + Red)</p> <p><strong>Classification methods:</strong></p> <p>We classified the input data using a Random Forest classifier with 100 trees. Data was classified into three coded land cover classes:</p> <p>1 - Phragmites</p> <p>2 - Other Vegetation</p> <p>3 - Open Water</p> <p>1,050 land cover reference points were collected with 70% used to train and 30% to test the classifier.</p> <p><strong>Accuracy:</strong></p> <p>Measures of accuracy including overall accuracy and per class user’s (UA) and producer’s accuracy (PA) of the random forest classifier were calculated.</p> <p>Overall accuracy: 95%</p> <p>Kappa: .92</p> <p>Phragmites: UA = 97% PA = 95%</p> <p>Other vegetation: UA = 92% PA = 96%</p> <p>Open water: UA = 100% PA = 95%</p> <p><strong>Code link:</strong></p> <p>The Google Earth Engine code used in this analysis is publicly available.</p> <p>https://github.com/mattswalter/Phragmites_Classification</p> <p><strong>Data for download:</strong></p> <p>The following zipped file is available for download:</p> <p> 1. Delaware_Phragmites_Classification.zip</p> <p>Contains a GEOTIFF titled "Phrag_DE_5PC" with the classified image for 2017. </p>
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