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343 results for “invasive aliens”
Figure 2 in Morphology, morpho-taxometric and molecular characterization of the invasive alien species Caribbean leatherleaf slug Sarasinula plebeia (Gastropoda: Veronicellidae): a first record in southern Philippines
Figure 2. Sarasinula plebeia isolate LDZS morphological characters as indicated by arrows of the ventral region (A); hyponotum (red), narrow foot running from anterior to posterior end (orange); dorsal region (B) showing the notum (green), perinotum (yellow), and a pair of ocular tentacles (blue).
Figure 1 in Morphology, morpho-taxometric and molecular characterization of the invasive alien species Caribbean leatherleaf slug Sarasinula plebeia (Gastropoda: Veronicellidae): a first record in southern Philippines
Figure 1. Map showing the sampling site (blue dot) in the selected area for terrestrial slug in La Dicha, Malangas, Zamboanga, Sibugay, southern Philippines.
Figure 3 in Morphology, morpho-taxometric and molecular characterization of the invasive alien species Caribbean leatherleaf slug Sarasinula plebeia (Gastropoda: Veronicellidae): a first record in southern Philippines
Figure 3. Phylogenetic relationship of Sarasinula plebeia isolate LDZS (bold) and related sequences inferred by the COI sequences through Bayesian analysis using GTR+I+G model showed a strong relation with posterior probability value of 1. Position of S. plebeia (JQ582279, JQ582278, JQ582277) also showed strong relation with L. alte (PP value of 1). Scale bar represents the estimated substitution per site.
Alien plant species are precursors for invasion: a case study of Alternanthera brasiliana (L.) Kuntze in Ile-Ife (Nigeria)
<p>The impact of <em>Alternanthera brasiliana</em> on vegetation and soil seed bank was assessed in Ile-Ife, Nigeria. Ten sample plots, 10 m x 10 m each, were established in invaded plant communities with high density of <em>Alternanthera brasiliana</em> and adjacent uninvaded plant communities where the weed species has low density. In each sample plot, twenty 1 m x 1 m quadrats were randomly laid and all rooted plant species were identified and counted. Post-dispersal soil seed bank was collected by randomly taking five core samples of top soil per sample plot to estimate the soil seed bank density and floristics of the sites. The species composition of soil seed bank was compared with that of the above-ground vegetation so as to assess the invader's impact on the vegetation using Sorensen's index of similarity. The results showed that <em>Alternanthera brasiliana</em> invasion significantly impacted on the species diversity (<em>t</em> = 5.27; <em>df</em> = 18; <em>p</em> = 0.0003) and evenness of species distribution (<em>t</em> = 4.50; <em>df</em> = 18; <em>p</em> = 0.00005) in the aboveground vegetation, and the species diversity (<em>t</em> = 5.37; <em>df</em> = 18; <em>p</em> = 0.00004) and evenness of species distribution (<em>t</em> = 6.19; <em>df</em> = 18; <em>p</em> < 0.0001) in the soil seed bank. This study concluded that <em>Alternanthera brasiliana</em> has significantly caused alterations in key parameters of the aboveground vegetation and those of the soil seed bank. It is likely that with increasing resident time, these alterations might increase more significantly to enhance the spread of <em>Alternanthera brasiliana</em>.</p>
Clonal functional traits favor the invasive success of alien plants into native communities
<p><span>Functional traits are frequently proposed to determine the invasiveness of alien species. However, few empirical studies have directly manipulated functional traits and tested their importance in the invasion success of alien species into native plant communities, particularly under global change. We manipulated clonal integration (a key clonal functional trait) of four alien clonal plants by severing inter-ramet connections or keeping them intact, and simulated their invasion into native plant communities with two levels of species diversity, population density and nutrient availability</span><span>. High community diversity and density impeded the invasion success of the alien clonal plants. Clonal integration of the alien plants promoted their invasion success, particularly in the low-density communities associated with low species diversity or nutrient addition, which resulted in a negative correlation between performance of alien plants and native communities, as expected under global change. Thus, clonal integration can favor the invasion success of alien clonal plants into degraded resident communities with </span><span>a high degree of disturbance</span><span> and eutrophication. Our findings confirm the role of clonal</span><span> functional traits in facilitating alien plant invasions into native plant communities, and suggest that </span><span>clonal functional traits should be considered to efficiently restore degraded communities heavily invaded by alien clonal plants.</span></p>
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>
Figure 3 in Establishment of an expansion-predicting model for invasive alien cerambycid beetle Aromia bungii based on a virtual ecology approach
Figure 3. Flow chart of simulation procedure the study.
Figure 1 in Establishment of an expansion-predicting model for invasive alien cerambycid beetle Aromia bungii based on a virtual ecology approach
Figure 1. Study area and simulation unit
Fig. 6 in Reciprocal Predation Between Preserved And Invasive Species: Adult Bombina Bombina Predate Young Whitebaits Of Alien Fish Perccottus Glenii
Fig. 6. Plot for fitted model of initial number of live and predated P. glenii.
Fig. 2. Experimental box with P in Reciprocal Predation Between Preserved And Invasive Species: Adult Bombina Bombina Predate Young Whitebaits Of Alien Fish Perccottus Glenii
Fig. 2. Experimental box with P. glenii and pair of B. bombina.
Fig. 2 in Native Bugseed Species Corispermum Intermedium Schweigg And Alien Corispermum Pallasii Steven In Coastal Habitats Of Latvia - New Knowledges Of Distribution And Invasions
Fig. 2. Achenes of Corispermum intermedium (left) and C. pallasii (right). Image: I. Svilāne.
Microplastics promote the invasiveness of invasive alien species under fluctuating water regime
<p>Microplastic pollution and alien plant invasions are two important threats to terrestrial ecosystems. Microplastics (MPs) alter the physical and chemical characteristics of soil, potentially affecting the performance of alien plants. However, previous studies have overlooked the impact of weather on invasive plants in areas polluted by MPs. With the global increase in extreme rainfall events, it is imperative to redefine the correlation between MPs and invasive plants. Here, we conducted an experiment in a climate chamber to examine the effects of MPs on the growth and development of both native and invasive alien plants under a constant and fluctuating water regime (FWR). The FWR simulated extreme water pulses during the 2016-2020 growing seasons in Wuhan, China. Our results indicated that biomass accumulation and roots development were influenced by water conditions and MPs pollution in both invasive and native species. The extent of the effects varied between the two groups of plant species. FWR promoted plant growth and fine root development in invasive plants but reduced the maximum quantum efficiency of photosystem II (<em>F</em><em><sub>v</sub></em><em>/F</em><em><sub>m</sub></em>) and nonphotochemical quenching (<em>NPQ</em>) indices of native plants. Moreover, FWR attenuated the negative effects of polybutylene succinate (PBS, degradable MPs) on biomass and root characteristics (length, surface area, and tips). FWR compensates for the negative impacts of MPs on the total and belowground biomass of the invasive species <em>Paspalum dilatatum</em> and <em>Sphagneticola trilobata</em>, but not on the native species. Consequently, invasive species showed better performance than native species in the fine-root development of biomass growth and chlorophyll fluorescence under the combined effects of MPs and FWR.</p> <p><em>Synthesis and Applications</em>. Our findings suggest that MPs pollution enhances the competitiveness of invasive alien species over the native species when exposed to pronounced dry-wet water cycle conditions, potentially affecting the composition and biodiversity of the ecosystems. Thus, controlling MPs pollution should be a part of the management strategy to conserve biodiversity and ecosystems.</p>
Fig. 1 in Drought-associated absence of alien invasive anchorworm, Lernaea cyprinacea (Copepoda: Lernaeidae), is related to changes in fish health
Fig. 1. Map of Nyamiti pan situated on the Phongolo River floodplain.
Figure 1 in First occurrence of the invasive alien species Streblospio gynobranchiata (Rice & Levin, 1998) and Polydora cornuta Bosc, 1802 (Polychaeta: Spionidae) on the coast of Abkhazia (Sukhum Bay, Black Sea)
Figure 1. Location of the stations where specimens of alien spionid polychaete were found.
Table 3 in Mowing inhibits the invasion of the alien species Solidago altissima and is an effective management strategy
<p><b>Table 3.</b> Heights of <i>S. altissima</i> before mowing in September 2019.</p><table><tbody><tr><th>Site</th><th>Control</th><th>Mowing 1</th><th>Mowing 2</th><th>Mowing 3</th></tr></tbody><tbody><tr><th>Site 1</th><td>168.0 ± 3.27a</td><td>64.0 ± 3.32c</td><td>100.5 ± 9.14b</td><td>67.5 ± 3.1c</td></tr><tr><th>Site 2</th><td>192.0 ± 11.3a</td><td>79.0 ± 4.07c</td><td>111.0 ± 6.9b</td><td>73.0 ± 7.61c</td></tr><tr><th>Site 3</th><td>159.0 ± 4.99a</td><td>123.0 ± 7.12b</td><td>84.5 ± 5.89c</td><td>47.0 ± 2.71d</td></tr><tr><th>Site 4</th><td>190.0 ± 2.98a</td><td>102.0 ± 3.89b</td><td>112.5 ±8.07b</td><td>62.0 ± 5.33c</td></tr><tr><th>Site 5</th><td>217.0 ±10.23a</td><td>87.5 ± 4.9c</td><td>137.0 ± 4.96b</td><td>62.5 ± 3.1d</td></tr><tr><th>Site 6</th><td>177.5 ± 6.76a</td><td>97.5 ± 5.44c</td><td>120.5 ± 4.97b</td><td>60.0 ± 2.58d</td></tr><tr><th>Site 7</th><td>143.5 ± 12.2a</td><td>81.0 ± 2.77b</td><td>138.5 ± 3.5a</td><td>62.0 ± 4.67b</td></tr></tbody></table><p>* Mowing 1: mowed once in July; Mowing 2: mowed twice in May and September; Mowing 3: mowed three times in May, July, and September. Data are presented as means ± standard errors of 10 replicates. Means within a row followed by different letters are significantly different at p <0.05 (ANOVA with post hoc Tukey’s test). Units: cm.</p>
Table 2 in Mowing inhibits the invasion of the alien species Solidago altissima and is an effective management strategy
<p><b>Table 2.</b> Heights of <i>S. altissima</i> before mowing treatment in May 2019.</p><table><tbody><tr><th>Site</th><th>Control</th><th>Mowing 1</th><th>Mowing 2</th><th>Mowing 3</th></tr></tbody><tbody><tr><th>Site 1</th><td>101.0 ± 3.2a</td><td>101.0 ± 3.0a</td><td>81.1 ± 2.6b</td><td>64.9 ± 3.1c</td></tr><tr><th>Site 2</th><td>116.5 ± 4.7a</td><td>111.8 ± 4.7a</td><td>82.9 ± 4.1b</td><td>72.5 ± 6.6b</td></tr><tr><th>Site 4</th><td>89.1 ± 2.2a</td><td>74.8 ± 2.2b</td><td>49.5 ± 3.1d</td><td>59.8 ± 1.6c</td></tr><tr><th>Site 5</th><td>93.5 ± 2.5a</td><td>99.5 ± 2.3a</td><td>78.0 ± 2.0b</td><td>77.1 ± 2.0b</td></tr><tr><th>Site 6</th><td>125.3 ± 5.2a</td><td>117.0 ± 3.0a</td><td>86.5 ± 3.0c</td><td>105.0 ± 3.4b</td></tr><tr><th>Site 7</th><td>123.3 ± 3.3a</td><td>119.3 ± 2.9ab</td><td>111.3 ± 2.8bc</td><td>110.3 ± 3.1c</td></tr><tr><th>Site 8</th><td>96.0 ± 4.0a</td><td>94.5 ± 4.1ab</td><td>84.5 ± 3.3bc</td><td>81.0 ± 3.1c</td></tr></tbody></table><p>* Mowing 1: mowed once in July; Mowing 2: mowed twice in May and September; Mowing 3: mowed three times in May, July, and September. Data are presented as means ± standard errors of 10 replicates. Means within a row followed by different letters are significantly different at p <0.05 (ANOVA with post hoc Tukey’s test). Units: cm.</p>
Table 1 in Mowing inhibits the invasion of the alien species Solidago altissima and is an effective management strategy
<p><b>Table 1.</b> Heights of dead shoots of <i>S. altissima</i> after 1 year of treatment in April 2019.</p><table><tbody><tr><th>Site</th><th>Control</th><th>Mowing 1</th><th>Mowing 2</th><th>Mowing 3</th><th>Eco 200</th></tr></tbody><tbody><tr><th>Site 1</th><td>162.8 ± 6.62a</td><td>85.7 ± 5.52b</td><td>29.5 ± 2.74c</td><td>21.3 ± 2.09c</td><td>77.9 ± 8.94b</td></tr><tr><th>Site 2</th><td>213.2 ± 12.08a</td><td>87.1 ± 7.33c</td><td>38.4 ± 2.17d</td><td>29.0 ± 2.01d</td><td>144.8 ± 9.57b</td></tr><tr><th>Site 3</th><td>163.4 ± 7.31a</td><td>66.3 ± 4.55c</td><td>40.7 ± 2.57d</td><td>33.4 ± 2.11d</td><td>143.4 ± 7.13b</td></tr><tr><th>Site 4</th><td>191.6 ± 3.84a</td><td>160.8 ± 7.90b</td><td>59.2 ± 1.66d</td><td>81.9 ± 6.50c</td><td>166.9 ± 12.33b</td></tr><tr><th>Site 5</th><td>181.7 ± 4.76a</td><td>114.7 ± 2.90b</td><td>89.5 ± 10.23c</td><td>46.6 ± 5.12d</td><td>183.8 ± 9.00a</td></tr><tr><th>Site 6</th><td>174.8 ± 4.34a</td><td>82.9 ± 4.49c</td><td>39.7 ± 2.51d</td><td>31.6 ± 2.47d</td><td>153.3 ± 3.12b</td></tr><tr><th>Site 7</th><td>165.5 ± 4.79a</td><td>91.2 ± 6.02b</td><td>64.7 ± 3.24c</td><td>44.0 ± 3.67d</td><td>153.8 ± 7.25a</td></tr></tbody></table><p>* Mowing 1: mowed once in July; Mowing 2: mowed twice in May and September; Mowing 3: mowed three times in May, July, and September; Eco 200: 30% of shoots in the quadrats were cut near the ground, and the cut surfaces were covered with the Eco 200 block. Data are presented as means ± standard errors of 20 replicates. Means within a row followed by different letters are significantly different at p <0.05 (ANOVA with post hoc Tukey’s test). Units: cm.</p>
Table 4 in Mowing inhibits the invasion of the alien species Solidago altissima and is an effective management strategy
<p><b>Table 4.</b> Change in areas occupied by <i>S. altissima</i> in patch-type communities from March 2018 to March 2019.</p><table><tbody><tr><th>Control</th><th>Mowing 3</th><th>Eco 20%</th><th>Eco 100%</th></tr></tbody><tbody><tr><th>205.2 ± 107.3</th><td>24.7 ± 44.0</td><td>104.5 ± 85.2</td><td><i>−</i> 31.7 ± 13.0</td></tr></tbody></table><p>Mowing 3: mowed three times in May, July, and September; Eco 20%: 20% of shoots were mowed and treated with Eco 200; Eco 100%: 100% of shoots were mowed and treated with Eco 200. Data are presented as means ± standard errors of six replicates.</p>
IPBES Invasive Alien Species Assessment, database for Chapter 4. Impact Evidence Database
<p>This is a database described in the data management report for chapter 4 of IPBES thematic assessment on invasive alien species and their control.</p> <p>Data were gathered on direct observations of impacts from published literature, including grey literature, in order to form a database on the evidence to which invasive alien species impact, negatively and positively, nature, nature's contributions to people and good quality of life for Chapter 4 of IPBES thematic assessment of invasive alien species and their control. The criteria for inclusion were a published direct evidence of an impact on native species, a change in ecosystem properties, nature's contributions to people and the extent to which humans were affected through changes in their constituents of well-being.</p> <p> </p> <p>Updates to version 3:</p> <p>1) Assessor “EAM” has been replaced by “Ester Mostert”,</p> <p>2) There were 50 Unique IDs that were paired. These are now differentiated by adding an a and b to the end of these to make them truly unique,</p> <p>3) Removed 40 duplicates</p> <p>4) RowID were re-numbered to reflect the unique number of rows</p> <p> </p>
Data from: How science communications can help build societal perceptions of invasive alien species and their impacts on the environment
<p>In this study, we investigated the reported beneficial aspects of the invasive alien plant species (IAPS) and argued that, over time and space, the detrimental impacts of the IAS might endanger sustainable livelihoods. The data set contains the following files:</p> <p>Data_S1.xlsx: The file contains details of 154 literature reports. From each paper, we extracted IAPS names (both as reported and standardized), taxonomic information (family and taxon rank), year, country, the scale of observation, and reported beneficial impacts. The beneficial impacts were further categorized into 13 use categories at TDWG (Taxonomic Databases Working Group) Level-1 states (in binary format - 1 indicates the IAPS use and 0 indicates not in use for the individual category).</p> <p>The Metadata_S1.pdf file contains detailed information on preparing literature records for data extraction, the data extraction process, and data organization. </p>
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