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14 results for “Stoebe”
The influence of environmental factors on the distribution and density of invasive Centaurea stoebe across Northeastern USA, 2013 - 2018
Centaurea stoebe (Asteraceae; spotted knapweed) is an emerging invader in northeast US, and is a major invasive plant in the northern Midwest and western USA. Although it has been present in New York State (NYS) for over 100 years, its apparent recent population increases and spread provide a rare opportunity to study a plant in the early stages of invasion. Therefore, a study was carried out understand how distinct environmental factors influence the distribution, density and change in density C. stoebe at different spatial scales within its novel range in the northeastern USA. First, we collected field data on the occurrence, density and change in density of this species in North Eastern United States, from 2013 to 2014. Then, using species distribution models, we assessed the potential influence of environmental factors on the invasion of spotted knapweed in northeast US. Within different parts of C. stoebe‘s range, different factors explained its occurrence, density and change in density over 2 years. Across northeast US, climate and soil factors were the most influential predictors explaining C. stoebe‘s distribution, while within Long Island in southeastern NYS and the Adirondack Mountains in northern NYS, precipitation and disturbance respectively were the most important. These results are published in the paper titled The influence of environmental factors on the distribution and density of invasive Centaurea stoebe across Northeastern USA (Akin-Fajiye and Gurevitch, 2018).
Centaurea stoebe Ledeb. (BR0000012451357)
Belgium Herbarium image of <a href="https://www.plantentuinmeise.be">Meise Botanic Garden</a>.
Centaurea stoebe Ledeb. (BR0000005654772)
Belgium Herbarium image of <a href="https://www.plantentuinmeise.be">Meise Botanic Garden</a>.
Centaurea stoebe Ledeb. (BR0000010749890)
Belgium Herbarium image of <a href="https://www.plantentuinmeise.be">Meise Botanic Garden</a>.
Centaurea stoebe Ledeb. (BR0000021256783)
Belgium Herbarium image of <a href="https://www.plantentuinmeise.be">Meise Botanic Garden</a>.
Centaurea stoebe Ledeb. (BR0000010748565)
Belgium Herbarium image of <a href="https://www.plantentuinmeise.be">Meise Botanic Garden</a>.
Supplementary Material for "Target-capture Phylogenetics of the Paper Daisy Stoebe clade (Gnaphalieae: Asteraceae) Using Compositae1061 Baits"
<p>This upload contains supporting information for a manuscript in preparation titled "Target-capture Phylogenetics of the Paper Daisy Stoebe clade (Gnaphalieae: Asteraceae) Using Compositae1061 Baits". The folder contains sequence alignments for the Stoebe clade of paper daisies (Gnaphalieae: Asteraceae), as well as species trees estimated using these data. Additional files are described in the accompanying README file.</p>
Herbarium specimens reveal a cryptic invasion of polyploid Centaurea stoebe in Europe - ITS1 dataset
<h3>Description of the data and file structure</h3> <p>We genotyped the ITS1 locus of 178 herbarium specimens using protocol described in Suchan et al. (2018; https://doi.org/10.1111/1755-0998.12948) and processed using custom script. The specimens were chosen after morphological determination of their cytotypes (morphological determination accuracy: 97.8%). We choose this subsample (3.5% of the total number of specimens) to represent comparable distributional ranges and collection dates across both cytotypes, including specimens from both the native and expanded ranges of tetraploid <em>C. stoebe</em>. Genotyping of the ITS1 locus unambiguously identifies the cytotype, as all tetraploid samples exhibit a unique ribotype B, which has never been found in diploid samples (Mráz et al., 2012; https://doi.org/10.1016/j.ympev.2011.11.006).</p> <h4>Files and variables</h4> <p><strong>File: Centaurea_stoebe_ITS1_script.sh</strong></p> <p>Description: This file contains the script used for processing raw sequence data to obtain a table with the numbers of reads in each sample mapping to the obtained ITS1 variants. The software used was: PEAR v0.9.6, cutadapt v.3.2, vsearch v2.28.1</p> <p><strong>File: Centaurea_stoebe_sample_list.xlsx</strong></p> <p>Description: This file contains a list of analyzed herbarium specimens.</p> <p>Variables</p> <ul> <li>ID - sample ID</li> <li>Lab working no. - Identifier of the samples in the ITS1 analyses, specifically in the Centaurea_stoebe_ITS1_sequence_numbers.xlsx file</li> <li>Morphology-based estimation - ploidy of the sample estimated with morphology (2 - diploid, 4 - tetraploid)</li> <li>ITS seq based estimation - ploidy of the sample estimated using ITS1 sequencing (2 - diploid, 4 - tetraploid)</li> <li>Congruence(1)/mismatch(0) - congruence (1) or mismatch (0) between morphological and genetic policy estimation</li> <li>Country of origin</li> <li>Herbarium</li> <li>Herbarium coll. number</li> <li>Collector</li> <li>Collection year</li> <li>Locality</li> <li>Latitude</li> <li>Longitude</li> </ul> <p><strong>File: Centaurea_stoebe_ITS1_sequences.fasta</strong></p> <p>Description: This file contains sequences of the obtained ITS1 variants.</p> <p><strong>File: Centaurea_stoebe_ITS1_sequence_numbers.xlsx</strong></p> <p>Description: This file contains a table with the numbers of reads in each sample mapping to the obtained ITS1 variants.</p> <p>Variables</p> <ul> <li>OTU - ITS1 variant number</li> <li>size - number of sequences from the total data clustered to the variant</li> <li>next columns contain numbers of reads mapped to each ITS1 variant for each sample</li> </ul> <h3>Code/software</h3> <p>The code to process sequence data is included in Centaurea_stoebe_ITS1_script.sh file. The software used was: PEAR v0.9.6, cutadapt v.3.2, vsearch v2.28.</p>
Data from: Invasion success in polyploids: the role of inbreeding in the contrasting colonization abilities of diploid versus tetraploid populations of Centaurea stoebe s.l
As a consequence of founder effects, inbreeding can hamper colonization success: First, in species with self-incompatibility controlled by an S-locus, inbreeding may decrease cross-compatibility, mainly due to the sharing of identical S-alleles between closely related mating partners. Secondly, inbreeding can reduce fitness of inbred relative to outbred offspring (i.e. inbreeding depression). Polyploids often show reduced inbreeding depression compared to diploids, which may contribute to the overrepresentation of polyploids among invasive species. This is the first study that tests how the effects of inbreeding differ between geocytotypes (i.e. ploidy levels within a given range). Our model organism, Centaurea stoebe, is strictly self-incompatible and comprises three geocytotypes: diploids are more frequent than tetraploids in the native range, while only tetraploids occur in the invasive range. We conducted a breeding experiment (sib-mating vs. outcrossing) with 14 native diploid, 13 native tetraploid and 15 invasive tetraploid populations. We recorded cross-compatibility and estimated a cumulative index for offspring fitness. Since frequent inbreeding can result in purging of genetic load responsible for inbreeding depression, our analyses included a metric for within-population relatedness, based on eight microsatellite markers, to assess the effect of purging. Inbreeding was found to reduce cross-compatibility, which was similarly pronounced in diploids and tetraploids. It also caused inbreeding depression in cumulative fitness, which was significant in diploids but not in tetraploids. No evidence of purging was observed as inbred fitness was not affected by within-population relatedness. Synthesis. Our results provide new insights into the contrasting invasion success of the cytotypes of C. stoebe. As the effects of cross-compatibility and purging were comparable between cytotypes, both processes can be ruled out to affect the colonization success of diploids versus tetraploids. Our findings are consistent with the hypothesis that polyploidy increases the masking of recessive mutations, which maintains high fitness in inbred tetraploids and may thus facilitate colonization of new ranges. We highlight that reduced inbreeding depression may add to previously acknowledged advantages of polyploids in range expansions, a mechanism that may hitherto have been underestimated due to a lack of data on variation in inbreeding depression across geocytotypes.
Data from: Invasion success in polyploids: the role of inbreeding in the contrasting colonization abilities of diploid versus tetraploid populations of Centaurea stoebe s.l
Open the record for dataset details and reuse information.
Centaurea stoebe Ledeb. (BR0000010749562)
Belgium Herbarium image of <a href="https://www.plantentuinmeise.be">Meise Botanic Garden</a>.
Centaurea stoebe Ledeb. (BR0000021256745)
Belgium Herbarium image of <a href="https://www.plantentuinmeise.be">Meise Botanic Garden</a>.
Centaurea stoebe Ledeb. (BR0000010748534)
Belgium Herbarium image of <a href="https://www.plantentuinmeise.be">Meise Botanic Garden</a>.
Centaurea stoebe Ledeb. (BR0000010748503)
Belgium Herbarium image of <a href="https://www.plantentuinmeise.be">Meise Botanic Garden</a>.
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