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229 results for “plant species richness”
Figure 5 in Gall-inducing arthropods in a Neotropical savanna area in the EPA of Rio Pandeiros (Bonito de Minas, MG, Brazil): effects of plant species richness and super-host abundance
Figure 5. Gall morphotypes in host plants in an area of Neotropical savanna in the EPA of Rio Pandeiros (Bonito de Minas, MG, Brazil). (A-B) Vochysiaceae = Qualea grandiflora, (C-D) Vochysiaceae = Qualea parviflora. of gall morphotypes per host plant species was 1.37. species was significantly influenced both by plant spe- Gall-inducing arthropods belonged to Acari, Diptera, cies richness (p = 0.011) and abundance of super-host Hemiptera and Lepidoptera. The most important gall-in- plants (p = 0.020) (Table 2). We found that galling speducing arthropods were Cecidomyiidae (Diptera) having cies per plant species was negatively affected by plant induced 34 (85.0%) gall morphotypes. In the sequence species richness (Fig. 6) and positively affected by abunwere Eriophyidae (Acari) inducing three (7.5%) mor- dance of super-host plants (Fig. 7). photypes, Psylloidea (Hemiptera) inducing two (5.0%) morphotypes, and Lepidoptera inducing a single (2.5%) morphotype. DISCUSSION The plant families that showed the greatest richness of arthropod galls were Fabaceae, with 16 (40.0%) mor- The number of galling species observed in the area photypes, Vochysiaceae with four (10.0%) and Myrtaceae of EPA of Rio Pandeiros (40 morphotypes) is intermediary (7.5%) with three morphotypes (Table 1). The plant spe- compared to other studies performed in Neotropical sacies Copaifera oblongifolia and Andira humilis Mart. ex vannas (Table 3). Forexample, Urso-Guimarãesetal. (2003) Benth. (Fabaceae) were the most important host spe- recorded only 22 gall morphotypes in cerrado fragments, cies with five and three morphotypes, respectively. All rupestrian field and gallery forest in Delfinópolis, Minas other host plant species had two or one morphotypes Gerais State. In other study, Maia & Fernandes (2004) re- (Table 1). Most of the arthropod galls occurred on leaves corded 137 morphotypes of insect galls in an area of rup- (90.0%), and was lenticular (45.0%), green (52.5%) and estrian fields and cerrado in the Serra de São José, Minas glabrous (82.5%). Gerais. These numbers extremely variable in the diversi- Galling species richness was not affected by none of ty of galling species can be explained by several factors, explanatory variables (Table 2), despite the tendency of among which are different sampling efforts employed in a positive effect of abundance of super-hosts on the gall the studies, as well as variations in the structural characrichness (p = 0.057). Already the galling species per plant teristics and diversity of the studied vegetation. The stan-
Figure 4 in Gall-inducing arthropods in a Neotropical savanna area in the EPA of Rio Pandeiros (Bonito de Minas, MG, Brazil): effects of plant species richness and super-host abundance
Figure 4. Gall morphotypes in host plants in an area of Neotropical savanna in the EPA of Rio Pandeiros (Bonito de Minas, MG, Brazil). (A) Fabaceae = Tachigali alba, (B) Malpighiaceae = Malpighiaceae sp., (C) Malvaceae = Eriotheca gracilipes, (D) Myrtaceae = Eugenia dysenterica, (E) Myrtaceae = Eugenia sp., (F) Myrtaceae = Psidium sp., (G) Ochnaceae = Ouratea hexasperma, (H) Ochnaceae = Ouratea spectabilis.
Figure 3 in Gall-inducing arthropods in a Neotropical savanna area in the EPA of Rio Pandeiros (Bonito de Minas, MG, Brazil): effects of plant species richness and super-host abundance
Figure 3. Gall morphotypes in host plants in an area of Neotropical savanna in the EPA of Rio Pandeiros (Bonito de Minas, MG, Brazil). (A-D) Fabaceae = Copaifera oblongifolia, (E) Fabaceae = Hymenaea stigonocarpa, (F-G) Fabaceae = Machaerium opacum, (H) Fabaceae = Sclerolobium denudatum.
Figure 2 in Gall-inducing arthropods in a Neotropical savanna area in the EPA of Rio Pandeiros (Bonito de Minas, MG, Brazil): effects of plant species richness and super-host abundance
Figure 2. Gall morphotypes in host plants in an area of Neotropical savanna in the EPA of Rio Pandeiros (Bonito de Minas, MG, Brazil). (A) Dilleniaceae = Davilla elliptica, (B) Ebenaceae = Diospyros hispida, (C) Erythroxylaceae = Erythroxylum suberosum, (D-F) Fabaceae = Andira humilis, (G) Fabaceae = Copaifera luetzelburgii, (H) Fabaceae = Copaifera oblongifolia.
Figure 1 in Gall-inducing arthropods in a Neotropical savanna area in the EPA of Rio Pandeiros (Bonito de Minas, MG, Brazil): effects of plant species richness and super-host abundance
Figure 1. Gall morphotypes in host plants in an area of Neotropical savanna in the EPA of Rio Pandeiros (Bonito de Minas, MG, Brazil). (A) Anacardiaceae =Anacardium humile, (B) Bignoniaceae = Handroanthus ochraceus, (C) Calophyllaceae = Kielmeyera speciosa, (D) Caryocaraceae = Caryocar brasiliense, (E) Combretaceae = Terminalia fagifolia, (F-G) Connaraceae = Connarus suberosus, (H) Dilleniaceae = Davilla elliptica.
Figure 2. Bird species accumulation curve and estimated richness curve obtained from the Chao 1 in Avifauna of the region of the Volta Grande Hydroelectric Power Plant in Southeast Brazil
Figure 2. Bird species accumulation curve and estimated richness curve obtained from the Chao 1 index for the study area located throughout the reservoir of the Volta Grande Hydroelectric Power Plant in Southeast Brazil. Vertical bars represent the standard deviation of the estimate.
Data from: Phylogenetic conservatism and biogeographic affinity influence woody plant species richness-climate relationships in eastern Eurasia
<p>Mechanisms underlying species richness patterns remain a central yet controversial issue in biology. Climate has been regarded as a major determinant of species richness. However, the relative influences of different evolutionary processes, (i.e. niche conservatism, diversification rate, and time for speciation) on species richness-climate relationships remain to be tested. Here, using newly compiled distribution maps for 11,422 woody plant species in eastern Eurasia, we estimated species richness patterns for all species and for families with tropical and temperate affinities separately, and explored the phylogenetic signals in species richness patterns of different families and their relationships with contemporary climate and climate change since the Last Glacial Maximum (LGM). We further compared the effects of niche conservatism (represented by contemporary-ancestral climate niches differences), diversification rate and time for speciation (represented by family age) on variation in the slopes of species richness-climate relationships. We found that winter coldness was the best predictor for species richness patterns of most tropical families while Quaternary climate change was the best predictor for those of most temperate families. Species richness patterns of closely-related families were more similar than those of distantly-related families within eudicots, and significant phylogenetic signals characterized the slopes of species richness-climate relationships across all angiosperm families. Contemporary-ancestral climate niche differences dominated variation in the relationships between family-level species richness and most climate variables. Our results indicate significant phylogenetic conservatism in family-level species richness patterns and their relationships with contemporary climate within eudicots. These findings shed light on the mechanisms underlying large-scale species richness patterns and suggest that ancestral climatic niche may influence the evolution of species richness-climate relationships in plants through niche conservatism.</p>
Soil toxicity and species dominance rather than nutrient availability drive plant species richness in swamp forests of Central Europe
<p><strong>Aim: </strong>A resource-based conceptual model of plant diversity (RBCM) assumes direct relationships between resource supply and the diversity of a local plant assembly. However, the RBCM largely ignores variation imposed by soil toxicity due to climatic effects. Both soil-limiting resources and soil toxicity vary along climatic gradients but their net and interactive effects on plant species diversity remain unknown. We asked how climatic gradients shape resource availability, soil toxicity and dominance of herb-layer graminoids, and how these predictors control local species diversity of herbs and bryophytes.</p> <p><strong>Location: </strong>Swamp forests, Central Europe</p> <p><strong>Taxon: </strong>Vascular plants, bryophytes</p> <p><strong>Methods: </strong>Alpha taxonomic diversity of vascular plants and bryophytes was counted for 101 vegetation plots sampled in temperate swamp forests distributed along an 800-km geographical gradient across the Continental, Alpine and Pannonian biogeographical regions. Path analysis (structural equation modelling) was used to quantify the direct and indirect effects of climatic variables (potential evapotranspiration; PET), limiting resources (soil N/P, Ca, C/N, proxies for light and water availability), and soil toxicity (Mn) on graminoid dominance and community diversity.</p> <p><strong>Results: </strong>PET negatively influenced species richness of both groups analysed either directly or indirectly through its positive effect on the cover of graminoid species. Alpha diversity of herbs was additionally reduced by soil toxicity (Mn). Limiting resources correlated either with species dominance (canopy shading, soil Ca) or with PET (soil N/P ratio), but they did not control species richness pattern.</p> <p><strong>Main Conclusions: </strong>Climate, soil toxicity and species dominance determined alpha diversity instead of the expected importance of soil limiting resources. These results are key to advancing the theoretical framework of the RBCM. Increased soil toxicity (Mn) in well-watered regions favours the dominance of plant competitors at the expense of less tolerant species. This implies a potential threat to wetland diversity under ongoing climate change.</p>
Data from: Different management practices influence growth of small plants in species-rich hay meadows through shading
<p>Data from: Different management practices influence growth of small plants in species-rich hay meadows through shading, published in Applied Vegetation Science. Photosynthetically active radiation (PAR) and Dry Matter Yield (DMY)</p>
Raw data for the manuscript entitled "Forest age and topographic position jointly shape the species richness and composition of vascular plants in karstic habitats"
<p>Doline surveys from the Mecsek Mountains, Hungary. Transects were established with north to south orientation across each doline, traversing their deepest point. Transects began and ended on doline rims, and consisted of 1 m  × 1 m plots spaced at 2 m intervals (94, 89, 90 and 99 plots in the different forest age classes, respectively; 372 plots in total). We recorded the presence/absence data of shrubs and herbs in each plot. Fieldwork was carried out between 2007 and 2019 from June to August, at the peak of the growing season.</p>
Cryptogam plant community stability: warming weakens influences of species richness but enhances effects of evenness
<p>Community stability is a fundamental factor sustaining ecosystem functioning and is affected by species richness and species evenness. The Arctic is warming more rapidly than other biomes, and cryptogam plant species (specifically lichens and bryophytes in this study) are major contributors to tundra biodiversity and productivity. However, to our knowledge, the impacts of warming on cryptogam community stability and the underlying mechanisms have not been investigated. We conducted a 13-year summer warming experiment in mesic birch hummock tundra vegetation near Daring Lake in the continental interior of low Arctic Canada, and recorded patterns of cryptogam species abundance in several different growing seasons. Warming decreased the stability of total community abundance, had no effects on species richness, but increased species evenness and species synchrony. Structural equation model analyses indicated that higher species richness was the principal factor associated with the stronger community abundance stability in the control plots, and that this effect was driven primarily by a negative correlation with species synchrony. By contrast, higher species evenness was the principal factor associated with the weakened community abundance stability in the warming plots, and this effect was driven primarily by a positive correlation with species synchrony. Our study suggests that climate warming could reduce cryptogam plant community stability in low Arctic tundra, and therefore decrease important ecosystem services including carbon storage and food availability to caribou in northern regions.</p>
Changing plant species composition and richness benefit soil carbon sequestration under climate warming
<p>Anthropogenic warming and land-use change are expected to accelerate global soil organic carbon (SOC) losses and change plant species composition and richness. However, how changes in plant composition and species richness mediate SOC responses to climate warming and land-use change remains poorly understood. Using data from a 7-year warming and clipping field experiment in an alpine meadow on the Qinghai-Tibetan Plateau, we examined the direct effects of warming and clipping on SOC storage versus their indirect effects mediated by plant functional type and species richness. We found that warming significantly increased SOC storage by 8.1% and clipping decreased it by 6.4%, which was closely correlated with the corresponding response of below-ground net primary productivity (BNPP). We also found a negative correlation between SOC storage and species richness, which was ascribed to the increased BNPP via enhancing the dominance of grasses and decreasing species richness under warming. The lower SOC storage under clipping was caused by the clipping-induced decrease in BNPP via weakening the dominance of grasses and increasing species richness. Our findings highlight that the SOC storage in this alpine meadow under climate warming and clipping was primarily governed by BNPP, which was mediated by changes in the dominance of grasses and species richness. Overall, our study demonstrates that shifting to the dominance of grasses and changing species richness would benefit soil C sequestration under climate warming, but this positive effect would be dampened by grazing or hay harvest.</p>
Plant species richness on the Tibetan Plateau: Patterns and determinants
<p><span><span>Whether current hypotheses for geographic patterns of species richness (SR) have a strong explanatory power for the Tibetan Plateau (TP) with extreme climatic conditions remains unclear. </span><span>In comparison with the classic "water–energy dynamics hypothesis", the unique climate factors (e.g., extreme low temperature and low oxygen partial pressure) on the TP likely significantly affect the spatial variation of SR. Here, </span></span><span>we investigate</span><span> geographic patterns and determinants of SR on the TP </span><span>through a systematic field investigation. We systematically analyzed a total of 2,013 plant communities covering 11 different vegetation types on the TP. The SR per 400 m<sup>2</sup> in the forests and shrubs and that per 1 </span><span>m<sup>2</sup></span><span> in alpine grasslands and deserts was 62.76 (±1.80 SE), 44.53 (±7.57 SE), 16.84 (±0.39 SE), and 3.62 (±0.55 SE), respectively. Unique climate factors, such as </span><span>extremely low temperature, mean diurnal temperature, and oxygen partial pressure,</span><span> act synergistically with water–energy dynamics and influence the spatial pattern of SR on the TP. </span><span>Our findings provide novel insights into the mechanisms underlying the spatial variation in plant diversity, especially on plateaus and in high-latitude regions. </span><span>Our findings and the SR map with 1 km resolution provide important benchmarks for biodiversity conservation and may help to improve predictions of the effect of climate change on biodiversity.</span></p>
Data from: Landscapes with higher crop diversity have lower aphid species richness but higher plant virus prevalence
<p>Diversifying agricultural systems by growing more than one crop species in an area can decrease pest and disease pressure and increase crop yields. However, there is a lack of information on how crop diversity at larger spatial scales influences pest and disease pressure. Here, we investigated how landscape-scale crop diversity affects aphid vector communities and prevalence of non-persistently transmitted potato virus Y (PVY). To test the influence of landscape-scale crop diversity on PVY prevalence and aphid communities, we conducted a field study during the 2020 and 2021 field seasons in the San Luis Valley, Colorado where we quantified aphid communities and PVY incidence at multiple sites. We then determined the association of aphid species richness and abundance and PVY incidence with landscape variables (crop diversity metrics and percentage cover of crop species) within 1, 2 and 3 km buffers from study sites. Higher crop diversity (measured as Shannon diversity index) led to decreased aphid species richness at a 3 km buffer in the 2021 field season. Percentage of alfalfa was positively associated with aphid species richness in 2020 and aphid abundance in 2021 within a 1 km buffer. Higher crop diversity led to increased PVY incidence at a 2 km buffer in 2021 and 3 km buffer in 2020 and 2021. At a 3 km buffer in 2021, we found a positive influence of crop species richness on PVY incidence and a negative influence of crop species evenness on PVY incidence. Also in 2021, we found a positive influence of percentage of potato (virus host) on PVY incidence and a negative influence of percentage of barley (virus non-host) on PVY incidence.</p> <p><strong>Synthesis and applications:</strong> In summary, we found that landscape-scale crop diversity impacts plant virus prevalence at spatial scales of >1 km. This suggests that potato growers could reduce PVY prevalence by geographically isolating potato fields from other potato or other PVY-hosts. Crop diversity had a negative influence on aphid vector communities so growers could reduce risk of virus spread by aphid vectors by using certified potato seed in a diversified landscape.</p>
Data and code from: Neighborhood habitat gains increase plant species richness in forest fragments - Rosenblad & Sullivan (2024)
<p>This repository contains all data and R code necessary to reproduce the results of Rosenblad & Sullivan (2024) <span>Neighborhood habitat gains increase plant species richness in forest fragments. README.md explains how the files fit together.</span></p>
Stylized urban landscapes optimized for compactness, climate regulation and vascular plant species richness
<p>The data set provides the output of a genetic algorithm optimizing a stylized urban region with respect to three target functions: urban compactness, climate regulation as an exemplary ecosystem service and vascular plant species richness as a measure of biodiversity.</p> <p>The optimisation varies the spatial allocation of three types of land cover blocks in a stylized urban region: high- and low-density and park blocks which consist of green and/or built-up cells. We systematically vary landscape composition at the block level, but keep city size constant.</p> <p>The data set is related to a publication submitted to Frontiers in Environmental Science.</p>
Dataset for plant species richness estimation in a wet grassland field using UAV data features
<p>This dataset supports the estimation of plant species richness in a wet grassland field using features extracted from UAV (Unmanned Aerial Vehicle) data. It includes field and plot shapefiles, pre-processed input data, model performance metrics, spatial predictions (RASTER files).The dataset also contains geospatial imagery in the form of input and scaled GeoTIFF images, as well as two additional CSV files: <code>date.csv</code>, which records the cutting dates relevant to the study, and <code>merged_obs.csv</code>, which consolidates all the features with canopy height information extracted from Digital Elevation Model (DEM) data with field observed plant species richness.</p> <ul> <li> <p><strong>Summary:</strong></p> <ul> <li><strong>BIomass_Samples_Shapefiles:</strong> Contains shapefiles for field and plot-level data.</li> <li><strong>Results:</strong> <ul> <li><strong>ALLDATA:</strong> Pre-processed input data for RF and PLS models.</li> <li><strong>MODELPERF:</strong> Performance metrics and variable importance for RF and PLS models.</li> <li><strong>RASTER:</strong> Spatially-explicit predictions (maps) for plant species richness estimation.</li> <li><strong>GLCM:</strong> Pre-processed Gray Level Co-occurrence Matrix (texture features).</li> <li><strong>VI:</strong> Pre-processed Vegetation Indices.</li> </ul> </li> <li><strong>TIF:</strong> Input and scaled geotiff images. <ul> <li><strong>rescaled:</strong> Rescaled geotiff images.</li> <li><strong>resampled:</strong> Resampled geotiff images.</li> </ul> </li> <li><strong>date.csv:</strong> Contains cutting dates for the field.</li> <li><strong>merged_obs.csv:</strong> Contains DEM and species richness data (number of species).</li> </ul> </li> </ul> <p>This work was supported by the German Federal Ministry of Education and Research (BMBF) through the Digital Agriculture Knowledge and Information System (DAKIS) Project [Grant number 031B0729E]. </p>
Data and R code used in Hennecke et al. "Plant species richness and the root economics space drive soil fungal communities"
<p>To investigate how plant diversity and root traits relate to soil fungal communities, in 2021 we collected trait data from plots in the Jena Experiment (https://the-jena-experiment.de; funded by the DFG FOR 5000) and characterized fungal communities by sequencing, respiration and lipid fatty acid quantification. </p>
Data from: Plant community responses to long-term fertilization: changes in functional group abundance drive changes in species richness
Declines in species richness due to fertilization are typically rapid and associated with increases in aboveground production. However, in a long-term experiment examining the impacts of fertilization in an early successional community, we found it took 14 years for plant species richness to significantly decline in fertilized plots, despite fertilization causing a rapid increase in aboveground production. To determine what accounted for this lag in the species richness response, we examined several potential mechanisms. We found evidence suggesting the abundance of one functional group—tall species with long-distance (runner) clonality—drove changes in species richness, and we found little support for other mechanisms. Tall runner species initially increased in abundance due to fertilization, then declined dramatically and were not abundant again until later in the experiment, when species richness and the combined biomass of all other functional groups (non-tall runner) declined. Over 86 % of the species found throughout the course of our study are non-tall runner, and there is a strong negative relationship between non-tall runner and tall runner biomass. We therefore suggest that declines in species richness in the fertilized treatment are due to high tall runner abundance that decreases the abundance and richness of non-tall runner species. By identifying the functional group that drives declines in richness due to fertilization, our results help to elucidate how fertilization decreases plant richness and also suggest that declines in richness due to fertilization can be lessened by controlling the abundance of species with a tall runner growth form.
Beyond species richness and community composition: Using plant functional diversity to measure restoration success in jarrah forest
<p>Aim: The importance of restoring ecosystem functions to native systems that have been degraded, damaged or destroyed is increasingly recognised. Yet few studies have measured the effect of restoration efforts on ecosystem functioning or the functional diversity (FD) that underpins it. Here we assessed change in FD of restored assemblages one to 25 years after the onset of post-mine restoration.</p> <p>Location: Northern Jarrah (<i>Eucalyptus marginata</i> Donn ex Sm.) Forest bioregion of south-western Australia.</p> <p>Methods: Functional richness, evenness, divergence and dispersion were derived from five plant functional traits relevant to community reassembly. Effects of three explanatory variables (i.e., age, year restoration was initiated, and time since fire) on six response variables (i.e., four FD indices, species richness, and compositional similarity to nearby reference forest) were analysed using linear mixed models for a dataset with repeated measures of plots through time (n= 810 plots), and linear models for a sub-set of one-time measures of different aged assemblages (i.e., space-for-time approach; n= 490 plots).</p> <p>Results: Functional evenness and functional dispersion increased with age, while functional divergence and functional richness decreased with age. Functional dispersion increased with time since fire, while functional richness decreased with time since fire. Species richness decreased with age, but at 25-years, species richness was comparable to that observed in reference forest. In contrast, similarity showed no relationship with age of restored forest, and at 25-years, similarity of restored forest to reference was low compared with similarity of reference forest to itself. Three of four FD indices had not reached those of reference jarrah forest 25-years after restoration had been initiated.</p> <p>Conclusions: Reassembly of FD suggests importance of environmental filtering and high functional redundancy. A longer time frame may be needed to assess FD of restored assemblages, and in the meantime, species richness is not an adequate surrogate of FD.</p>
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Allen Brain Atlas
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DANDI Archive for NWB datasets
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International Brain Laboratory public data
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OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.