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173 results for “Alien plants”
More than half of the alien plants naturalised in the arid southeast of the Iberian Peninsula could be invasive
<p>Data set of dthe paper "More than half of the alien plants naturalised in the arid southeast of the Iberian Peninsula could be invasive", by María J. Salinas-Bonillo, Alba Rodríguez-Rodríguez, M. Trinidad Torres-García, Miguel Cueto, and Javier Cabello.</p> <p>This data set includes the scores of the Australian and New Zealand Weed Risk Assessment (AWRA) (Pheloung et al. 1999) for 144 alien plant species naturalised in the arid southeast of the Iberian Peninsula, the geographical coordinates where they are recorded in the wild, and the bibliographic sources from which the information was obtained to answer the AWRA questions.</p>
Dataset for: Designing a surveillance program for early detection of alien plants and insects in Norway
<p><span>Naturalized species of alien plants and animals comprise < 3% of biodiversity recorded in Norway but have had major impacts on natural ecosystems through displacement of native species. Encroachment of alien species has been especially problematic for coastal sites close to transport facilities and urban areas with high-density housing. The goal of our field project was to design and test a surveillance program for early detection of alien species of vascular plants and terrestrial insects at the first phase of establishment in natural areas. In our 3-year project (2018–2020), we sampled 60 study plots in three counties in the Oslofjord region of southern Norway. Study plots (6.25 ha) were selected by two criteria: manual selection based on expert opinion (27 plots) or by random selection based on weights from a hotspot analysis of occurrence of alien species (33 plots). Vascular plants were surveyed by two experienced botanists who found a total of 239 alien species of vascular plants in 95 rounds of surveys. Insects and other invertebrates were captured with a single Malaise trap per site, with 3-4 rounds of repeated sampling. We used DNA-metabarcoding to identify invertebrates based on DNA extractions from crushed insects or from the preservative media. Over 3,500 invertebrate taxa were detected in 255 rounds of sampling. We recorded 20 alien species of known risk and 115 species that were new to Norway, including several 'doorknocker' species identified by previous risk assessments. We modeled the probabilities of occupancy (</span><span>y</span><span>) and detection (p) with occupancy models with repeated visits by multiple observers (vascular plants) or multiple rounds of sampling (insects). The two probabilities covaried with risk category for alien organisms and both were low for species categorized as no known or low risk (range = 0.052 to 0.326) but were higher for species categorized as severe risk (range = 0.318 to 0.651). Selecting sites at random or manually did not improve the probability of finding novel alien species, but occupancy had a weak positive relationship with housing density for some categories of alien plants and insects. We used our empirical estimates to test alternative sampling designs that would minimize the combined variance of occupancy and detection (A-optimality criterion). Sampling designs with 8–10 visits per site were best for surveillance of new alien species if the probabilities of occupancy and detection were both low, and provided low conditional probabilities of site occupancy (psi-hat(cond) </span><span>£</span><span> 0.032) and a high probabilities of cumulative detection (p-hat(star) </span><span>³</span><span> 0.943). Our field results demonstrate that early detection is feasible as a key component of a national surveillance program based on early detection and rapid response (EDRR). </span></p>
A dataset on alien vascular plant species in Japan
<p>This dataset contains a list of 1,753 alien vascular plant taxa (i.e., species, infraspecific taxa and hybrids; hereafter species for simplicity) found in Japan and data on the year of first record and pathways of introduction for many, if not all, of these species. The dataset was created during the study documented in the following article:</p> <p><strong>Egawa C. & Koyama A. (2023) Temporal trends in the accumulation of alien vascular plant species through intentional and unintentional introductions in Japan. NeoBiota 83: 179-196. https://doi.org/</strong><strong>10.3897/neobiota.83.101416</strong></p> <p>Procedures for creating the dataset are detailed in the article. Concise explanation of the dataset can be found in the README sheet in the file.</p>
Data from: Biomass responses of widely and less-widely naturalized alien plants to artificial light at night
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Dataset for: Designing a surveillance program for early detection of alien plants and insects in Norway
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Alien plant species are precursors for invasion: a case study of Alternanthera brasiliana (L.) Kuntze in Ile-Ife (Nigeria)
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Data from: Plant-soil feedback contributes to predicting plant invasiveness of 68 alien plant species differing in invasive status
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Data from: Expected spatial patterns of alien woody plants in South Africa’s protected areas under current scenario of climate change
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Artificial night-time lighting and nutrient enrichment synergistically favour the growth of alien ornamental plant species over co-occurring native plant species
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Data from: Niche dynamics of alien plant species in Mediterranean Europe
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Constructing a database of alien plants in the Himalayas to test patterns structuring diversity
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Direct and indirect effects of native plants and herbivores on biotic resistance to alien aquatic plant invasions
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Data from: Urban residents impressions of Invasive Alien Plants in South African towns
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Native plant species are more resistant than invasive aliens to escalating environmental change factors
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Clonal functional traits favor the invasive success of alien plants into native communities
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Data from: Competitive ability of native and alien plants: effects of residence time and invasion status
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Inter- and intraspecific selection in alien plants: how population growth, functional traits and climate responses change with residence time
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Floral visitation to alien plants is non-linearly related to their phylogenetic and floral similarity to native plants
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Present status, future trends, and control strategies of invasive alien plants in China affected by human activities and climate change
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Data from: Phylogenetic and functional distinctiveness explain alien plant population responses to competition
Several invasion hypotheses predict a positive association between phylogenetic and functional distinctiveness of aliens and their performance, leading to the idea that distinct aliens compete less with their resident communities. However, synthetic pattern relationships between distinctiveness and alien performance and direct tests of competition as the driving mechanism have not been forthcoming. This is likely because different patterns are observed at different spatial grains, because functional trait and phylogenetic information are often incomplete, and due to the need for competition experiments that measure demographic responses across a variety of alien species that vary in their distinctiveness. We conduct a competitor removal experiment and parameterize matrix population and integral projection models for 14 alien plant species. More novel aliens compete less strongly with co-occurring species in their community, but these results dissipate at a larger spatial grain of investigation. Further, we find that functional traits used in conjunction with phylogeny improve our ability to explain competitive responses. Our investigation shows that competition is an important mechanism underlying the differential success of alien species.
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OpenNeuro
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