Find research datasets worth reusing

Search datasets from major research repositories and use ShareScore to quickly assess how well each record supports discovery, access, and reuse.

183

datasets available to search

ShareScore release 0.7.1

Dataset results

183 results for “exotic species”

Learn how ShareScore rates datasets ↗

zenodo36/100

Figure 1 in Population abundance and growth parameters of an exotic bivalve species, Anadara kagoshimensis, in the Southwestern Black Sea

Figure 1. Map showing the study areas and sampling stations in the Southwestern Black Sea

opencc-by-4.0Jan 2023View details →

zenodo36/100

Figure 5 in Population abundance and growth parameters of an exotic bivalve species, Anadara kagoshimensis, in the Southwestern Black Sea

Figure 5. Change of per haul biomass by subarea and year.

opencc-by-4.0Jan 2023View details →

zenodo36/100

Figure 4 in Population abundance and growth parameters of an exotic bivalve species, Anadara kagoshimensis, in the Southwestern Black Sea

Figure 4. Distribution of biomass A. kagoshimensis CPUA (kg km–2) in 2012.

opencc-by-4.0Jan 2023View details →

zenodo36/100

Figure 1 in Ecological and economic impacts of exotic fish species on fisheries in the Pearl River basin

Figure 1. Locations of the 10 sampling sites in the Pearl River basin, China.

opencc-by-4.0Nov 2018View details →

zenodo36/100

Figure 1 in Contribution to the aphid fauna of the Ordu province with first record of an exotic aphid species, Euceraphis gillettei Davidson, 1915, in Turkey

Figure 1. Some of the defined species.

opencc-by-4.0Aug 2022View details →

zenodo36/100

Data for "Are exotic saltmarsh species better than native species for coastal protection? "

Full data for Figue 2~3 are saved in "Figure 2.xlsx" and "Figure 3.xlsx", and data for Figure 4a is saved in "Figure 4.xlsx".

opencc-by-4.0Oct 2024View details →

dryad36/100

Traits data of exotic species in four tropical botanic gardens and adjacent natural forests

The establishment of new botanic gardens in tropical regions highlights a need for weed risk assessment tools suitable for tropical ecosystems. The relevance of plant traits for invasion into tropical rainforests has not been well studied. Working in and around four botanic gardens in Indonesia where 600 exotic species have been planted, we estimated the effect of four plant traits and time since species were introduced on: a) naturalization probability of exotic species; b) the abundance (density) of naturalized species in adjacent native tropical rainforests; and c) the distance that naturalized exotics have spread from the botanic gardens. We found that specific leaf area (SLA) strongly differentiated 23 naturalized from 78 non-naturalized exotic species (randomly selected from 577 non-naturalized species) in our study. These trends may indicate that exotics with high SLA benefit from at least two factors when establishing in tropical forests: high growth rates and occupation of forest gaps. Exotic species that were present in the gardens for over 30 years and those with small seeds also had higher probabilities of becoming naturalized, indicating that plants can invade the understorey of closed canopy tropical rainforests, especially when invading species are shade-tolerant and have sufficient time to establish. On average, exotic species that were not animal dispersed spread 78 m further into the forests than animal-dispersed species. We did not detect relationships between the measured traits and estimated density of naturalized exotics in the adjacent forests. Synthesis: Traits were able to differentiate exotic species that naturalized from botanic gardens from those that did not; this is promising for developing trait-based risk assessment in the tropics. We suggest tropical botanic gardens avoid planting exotic species with fast carbon capture strategies and those that are shade tolerant, to limit the risk of invasion and spread into adjacent native forests.

opencc-zeroAug 2021View details →

dryad36/100

Data for: Invasion by an exotic grass species homogenises native freshwater plant communities

A growing body of evidence has shown that biological invasions cause shifts in species composition of communities in space and time. Although biological invasions are considered a major driver of biotic homogenisation worldwide, most previous studies are conducted at small spatial scales and over short time periods, which may have underestimated the impacts of exotic species on native communities. Using a unique dataset of aquatic plants sampled in 235 sites over 12 years (2007–2010 and 2015–2019) in a large reservoir (Itaipu Reservoir; 1,350 km²), we analyzed how the invasion of a non-native grass (Urochloa arrecta) affects the species richness, ecological uniqueness (i.e., local contribution to beta diversity – LCBD) and temporal β–diversity of native plant communities. From 3,934 surveyed plant communities, U. arrecta was recorded in 2,888 samples and it was absent from 1,046 samples. Overall, species richness and ecological uniqueness of native plant communities were markedly lower in sites invaded than non-invaded by U. arrecta. From 2007 to 2019, the ecological uniqueness of native plants was 60% lower in the invaded than non-invaded sites. Whereas in invaded sites the species loss was the dominant mechanism driving native communities over time, in non–invaded sites the gain of new native species was the primary mechanism underlying community trajectories. Moreover, comparing native plant communities before and after the invasion of U. arrecta, species richness, ecological uniqueness and species gains of native plant communities decreased, whereas species losses increased after the invasion of U. arrecta. Finally, the positive relationship between native biodiversity and precipitation was stronger in sites non-invaded than invaded by U. arrecta. Synthesis: Our findings provide comprehensive evidence that an invasive plant is decreasing the spatial and temporal β–diversity of native plant communities through declining species richness, rather than simply correlating with them. This suggests that U. arrecta is driving native plants to become less diverse and homogeneous after the invasion, both spatially and temporally. Our findings illustrate that at broad scales, aquatic plant communities may become increasingly homogeneous with the increasing number of biological invasion events taking place worldwide.

opencc-zeroDec 2022View details →

dryad36/100

Effects of nutrient pulses on exotic species shift from positive to neutral with decreasing water availability

Temporal fluctuation in nutrient availability generally promotes the growth of exotic plant species and has been recognized as an important driver of exotic plant invasions. However, little is known about how the impact of fluctuating nutrients on exotic species depends on the availability of other resources, although most ecosystems are experiencing dramatic variations in a wide variety of resources due to global change and human disturbance. Here, we explored how water availability mediates the effect of nutrient pulses on the growth of six exotic and six native plant species. We subjected individual plants of exotic and native species to well-watered or water-stressed conditions. For each level of water availability, we added equivalent amounts of nutrients at a constant rate, as a single large pulse or in multiple small pulses. Under well-watered conditions, nutrient pulses promoted exotic plant growth relative to nutrients supplied constantly, while they had no significant effect on natives. In contrast, under water-stressed conditions, water deficiency inhibited the growth of all exotic and native species. More importantly, nutrient pulses did not increase plant growth relative to nutrients supplied constantly and these phenomena were observed for both exotic and native species under water-stressed conditions. Taken together, our study shows that the impact of fluctuating nutrient availability on the growth of exotic plant species strongly depends on the variation of other resources and that the positive effect of nutrient pulses under well-watered conditions disappears under water-stressed conditions. Our findings suggest that variation of multiple resources may have complex feedback to exotic plant invasions, and therefore it is critical to encompass multiple resources for the evaluation of fluctuating resource availability effects on exotic plant species. This will allow us to project the invasive trajectory of exotic plant species more accurately under future global change and human disturbance.

opencc-zeroDec 2022View details →

dryad36/100

Exotic tree species have consistently lower herbivore load in a cross-Atlantic tree biodiversity experiment

It is commonly expected that exotic plants experience reduced herbivory, but experimental evidence for such enemy release is still controversial. One reason for conflicting results might be that community context has rarely been accounted for, although the surrounding plant diversity may moderate enemy release. Here, we tested the effects of focal tree origin and surrounding tree diversity on herbivore abundance and leaf damage in a cross-Atlantic tree diversity experiment in Canada and Germany. We evaluated six European tree species paired with six North American congeners in both their native and exotic range, expecting lower herbivory for the exotic tree species in each pair at each site. Such reciprocal experiments have long been called for, but have not been realized thus far. In addition to a thorough evaluation of overall enemy release effects, we tested whether enemy release effects change with the surrounding tree diversity. Herbivore abundance was indeed consistently lower on exotics across all six tree genera (12 comparisons). This effect of exotic status was independent of continent, phylogenetic relatedness and surrounding tree diversity. In contrast, leaf damage associated with generalist leaf chewers was consistently higher on North American tree species. Interestingly, several species of European weevils were the most abundant leaf chewers on both continents and the dominant herbivores at the Canadian site. Thus, most observed leaf damage likely reflects the effect of generalist herbivores that feed heavily on plant species they have not evolved with. At the German site, sap-suckers were the dominant herbivores and showed a pattern consistent with enemy release. Taken together, the consistently lower herbivory on exotics on both continents is not purely a pattern of enemy release in the strict sense, but to some degree additionally reflects the susceptibility of native plants to invasive herbivores. In conclusion, our cross-Atlantic study is consistent with the idea that non-native trees have generally reduced herbivory, regardless of tree community diversity and species identity, but for different reasons depending on the dominant herbivore guild.

opencc-zeroApr 2023View details →

dryad36/100