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Data from: Responses of common and rare aliens and natives to nutrient availability and fluctuations
- 负责人：
- DOI：
- doi:10.5061/dryad.dp24m
- 摘要：
- it is frequently suggested that common species, and particularly invasive alien species, are phenotypically highly plastic, they might benefit more from these
Data from: Increases and fluctuations in nutrient availability do not promote dominance of alien plants in synthetic communities of common natives
- 负责人：
- DOI：
- doi:10.5061/dryad.9jj4f50
- 摘要：
- 1. It is frequently thought that global environmental changes, and especially the concomitant changes in environmental variability, could further increase the success of invasive species in native resident communities. However, very few studies explicitly tested this, and it remains unknown whether invasive and non-invasive alien species respond differently to resource fluctuations in resident communities. 2. We grew ten invasive and ten non-invasive species as target species in pot-mesocosms with four different synthetic native resident communities under six nutrient treatments differing in overall nutrient availability and temporal fluctuations in nutrient supply (constant low, constant high, gradual increasing, gradual decreasing, single large pulse, multiple smaller pulses). With the exception of plants in the constant low treatment, the plants were supplied the same total amount of nutrients during the experiment. We tested whether high nutrient availability and fluctuations in nutrient supply increased performance of both invasive and non-invasive alien plants within native resident communities, and whether invasive ones benefited more than non-invasive ones. 3. We found that the increase in biomass in response to nutrient addition was stronger for invasive than for non-invasive alien species. However, as the native competitors benefited even more from nutrient addition, the relative biomass of the alien target plant species, particularly the non-invasive ones, decreased. When the nutrient supply gradually increased, biomass of alien targets as well as native competitors decreased compared to the plants in the constant nutrient supply treatment. Surprisingly, when nutrients were supplied as a single large pulse, the absolute and relative biomass of the alien target plants decreased. The reduction in relative biomass was even stronger for invasive than for non-invasive alien species, and a similar pattern was found when nutrients were supplied as multiple smaller pulses. 4. Our results confirm previous findings that invasive alien species benefit more from nutrient addition than non-invasive alien species. However, in contrast to previous findings, our results suggest that nutrient fluctuations can suppress biomass of alien plants relative to that of natives, at least when the natives are themselves very successful, common species.
Data from: Diffuse symbioses: roles of plant–plant, plant–microbe and microbe–microbe interactions in structuring the soil microbiome
- 负责人：
- DOI：
- doi:10.5061/dryad.2fc8m
- 摘要：
- tata, Lupinus perennis) grown in communities varying in plant richness (1-, 4-, 8- or 16-species). We assessed Streptomyces antagonistic activity and analysed bacterial
Data from: A new resource for the development of SSR markers: millions of loci from a thousand plant transcriptomes
- 负责人：
- DOI：
- doi:10.5061/dryad.rb7h0
- 摘要：
- for developing microsatellite loci across the plant tree of life. We developed loci from these transcriptomes and tested their utility. Methods and Results: Usi
Data from: Strong patterns of intraspecific variation and local adaptation in Great Basin plants revealed through a review of 75 years of experiments
- 负责人：
- DOI：
- doi:10.5061/dryad.3pf2cb4
- 摘要：
- Variation in natural selection across heterogeneous landscapes often produces 1) among-population differences in phenotypic traits, 2) trait
Data from: Post-fire recovery in coastal sage scrub: seed rain and community trajectory
- 负责人：
- DOI：
- doi:10.5061/dryad.s1g64
- 摘要：
- Disturbance is a primary mechanism structuring ecological communities. However, human activity has the potential to alter the frequency and intensity of natural disturbance regimes, with subsequent effects on ecosystem processes. In Southern California, human development has led to increased fire frequency close to urban areas that can form a positive feedback with invasive plant spread. Understanding how abiotic and biotic factors structure post-fire plant communities is a critical component of post-fire management and restoration. In this study we considered a variety of mechanisms affecting post-fire vegetation recovery in Riversidean sage scrub. Comparing recently burned plots to unburned plots, we found that burning significantly reduced species richness and percent cover of exotic vegetation the first two years following a 100-hectare wildfire. Seed rain was higher in burned plots, with more native forb seeds, while unburned plots had more exotic grass seeds. Moreover, there were significant correlations between seed rain composition and plant cover composition the year prior and the year after. Collectively, this case study suggests that fire can alter community composition, but there was not compelling evidence of a vegetation-type conversion. Instead, the changes in the community composition were temporary and convergence in community composition was apparent within two years post-fire.
Data from: Phylogenetic structure and host abundance drive disease pressure in communities
- 负责人：
- DOI：
- doi:10.5061/dryad.kf401
- 摘要：
- Pathogens play an important part in shaping the structure and dynamics of natural communities, because species are not affected by them equally
Data from: No evidence for Fabaceae Gametophytic self-incompatibility being determined by Rosaceae, Solanaceae, and Plantaginaceae S-RNase lineage genes
- 负责人：
- DOI：
- doi:10.5061/dryad.71rn0
- 摘要：
- , Medicago truncatula, Cicer arietinum, Glycine max, and Lupinus angustifolius genomes. Since we find these genes in Fabaceae species, we characterize the S-lineage T2
Data from: Are leaf functional traits “invariant” with plant size, and what is “invariance” anyway?
- 负责人：
- DOI：
- doi:10.5061/dryad.r3n45
- 摘要：
- Studies of size-related plant traits have established a suite of mathematical functions describing whole plant investment and allocation. In parallel, studies of plant “economic spectra” have measured the scaling and variance composition of traits related to the major dimensions of both structure and function. Here we explore the intersection of these two broad areas by exploring the notion that many leaf economic traits are invariant with species differences in adult plant size. Invariant traits are those that do not change with plant size and are invoked as a key simplifying assumption of prominent models that purport to explain the scaling of plant size and metabolism. Unfortunately, leaf trait invariance is neither well defined nor understood, and has never been critically evaluated. Using a global plant trait dataset, we evaluated whether nine key traits can be considered as effectively invariant as a function of the maximum height of plant species, within and across plant growth forms, and within and across broad taxonomic groups. We also examine the influence of habitat, biome and global spatial scales on the size-relative variance in plant functional traits. We suggest that while invariance is an intuitive concept, an objective statistical definition is elusive. Expanding on ideas drawn from the study of life history invariants, we propose five criteria to identify traits that are effectively invariant, depending on the research question. We show that all studied “leaf economic spectrum” (LES) traits approach invariance within and between herbaceous and woody plant groups; angiosperms and gymnosperms; and within most biome and habitat types. Individual leaf area, however, shows a modest increase with plant size, and there are significant shifts in the average LES trait values at a given plant maximum height, among the plant growth forms and taxonomic groups. Our results demonstrate that generally, LES traits show little interspecific variation with maximum plant height, which provides some support for attempts to model plants with “average” leaf properties. Our work also highlights the need for a better understanding of the drivers of leaf size variation within and across individuals, functional groups, clades, biomes and habitats.
Data from: A long PCR based approach for DNA enrichment prior to next-generation sequencing for systematic studies
- 负责人：
- DOI：
- doi:10.5061/dryad.kc75n
- 摘要：
- Premise of the study: We present an alternative approach for molecular systematic studies that combines long PCR and next-generation sequencing (NGS). Our approach can be used to generate templates from any DNA source for NGS. Here we test our approach by amplifying complete chloroplast genomes and we present a set of 58 potentially universal primers for angiosperms to do so. Additionally, this approach is likely to be particularly useful for nuclear regions. Methods and Results: Chloroplast genomes of 30 species across angiosperms were amplified to test our approach. Amplification success varied depending on whether PCR conditions were optimized for a given taxon. To further test our approach, some amplicons were sequenced on an Illumina HiSeq 2000. Conclusions: Although here we tested this approach by sequencing plastomes, long PCR amplicons could be generated using DNA from any genome, expanding the possibilities of this approach for molecular systematic studies.
