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.
39
datasets available to search
ShareScore release 0.9.0
Dataset results
39 results for “secondary growth”
Stand Dynamics and Radial Growth Measurements from Old-Growth and Secondary-Growth Forests at the Coweeta Hydrologic Laboratory and Joyce Kilmer Wilderness Area
Our objectives were to define disturbance causes, rates (percent disturbance per decade), magnitudes and frequency (time since last disturbance) for both secondary and old-growth mixed-oak stands, and to determine if all mixed oak stands experience similar disturbance history.
X-ray imaging of 30 year old wine grape wood reveals cumulative impacts of rootstocks on scion secondary growth and harvest index
<p><span></span></p> <p><span>Annual rings from vines in a 30 year old, California rootstock trial were measured to determine the effects of 15 different rootstocks on Chardonnay and Cabernet Sauvignon scions. Viticultural traits measuring vegetative growth, yield, berry quality, and nutrient uptake were measured at the beginning and end of the lifetime of the vineyard.</span></p> <p><span>X-ray Computed Tomography (CT) was used to measure ring widths in 103 vines. Ring width was modeled as a function of ring number using a negative exponential model. Early and late wood ring widths, cambium width, and scion trunk radius were correlated with 27 traits. </span></p> <p><span>Modeling of annual ring width shows that scions alter the width of the first rings but that rootstocks alter the decay thereafter, consistently shortening ring width throughout the lifetime of the vine. The ratio of yield to vegetative growth, juice pH, photosynthetic assimilation and transpiration rates, and stomatal conductance are correlated with scion trunk radius.</span></p> <p><span>Rootstocks modulate secondary growth over years, altering hydraulic conductance, physiology, and agronomic traits. Rootstocks act in similar but distinct ways from climate to modulate ring width, which borrowing techniques from dendrochronology, can be used to monitor both genetic and environmental effects in woody perennial crop species.</span></p>
Modelling seasonal dynamics of secondary growth in R
<p>The monitoring of seasonal radial growth of woody plants addresses the ultimate question of when, how, and why trees grow. Assessing the growth dynamics is important to quantify the effect of environmental drivers and understand how woody species will deal with the ongoing climatic changes. One of the crucial steps in the analyses of seasonal radial growth is to model the dynamics of xylem and phloem formation based on increment measurements on samples taken at relatively short intervals during the growing season. The most common approach is the use of the Gompertz equation, while other approaches, such as general additive models (GAMs) and generalised linear models (GLMs), have also been tested in recent years. For the first time, we explored artificial neural networks with Bayesian regularisation algorithm (BRNNs) and show that this method is easy to use, resistant to overfitting, tends to yield s-shaped curves and is therefore suitable for deriving temporal dynamics of secondary tree growth. We propose two data processing algorithms that allow more flexible fits. The main result of our work is the XPSgrowth() function implemented in the radial Tree Growth (rTG) R package, that can be used to evaluate and compare three modelling approaches: BRNN, GAM and the Gompertz function. The newly developed function, tested on intra-seasonal xylem and phloem formation data, has potential applications in many ecological and environmental disciplines where growth is expressed as a function of time. Different approaches were evaluated in terms of prediction error, while fitted curves were visually compared to derive their main characteristics. Our results suggest that there is no single best fitting method, therefore we recommend testing different fitting methods and selection of the optimal one.</p>
parallel-fibered bone; A5, osteocyte lacunae with well-preserved canaliculi; B3, osteocyte lacunae lacking canaliculi; B4, B5, growth pattern with preserved residuals of the thick annuli and zones (zo I–III) and thin annuli and zones (zo IV–VII); A6, growth pattern with preserved thin annuli and thick zones (zo I–IV), the dotted line marks the border between the perimedullary region and the cortex. Arrows in A5 and B3 indicate osteocyte lacunae; in B4, B5, and A6 indicate the annuli. Growth pattern in B4 figured on the lateral section side, in B5 and A5 on the ventral side; note the cortex thickness variation between B4 and B5. A1, A3, A4, A6, B1, B4, B5 in polarized light and A2, A5, B2, B3 in normal transmitted light. Abbreviations: an, annulus; ec, erosion cavity; pmr, perimedullary region; pos, primary osteon; sos, secondary osteon; zo, zone. in Palaeohistology helps reveal taxonomic variability in exceptionally large temnospondyl humeri from the Upper Triassic of Krasiejów, SW Poland
parallel-fibered bone; A5, osteocyte lacunae with well-preserved canaliculi; B3, osteocyte lacunae lacking canaliculi; B4, B5, growth pattern with preserved residuals of the thick annuli and zones (zo I–III) and thin annuli and zones (zo IV–VII); A6, growth pattern with preserved thin annuli and thick zones (zo I–IV), the dotted line marks the border between the perimedullary region and the cortex. Arrows in A5 and B3 indicate osteocyte lacunae; in B4, B5, and A6 indicate the annuli. Growth pattern in B4 figured on the lateral section side, in B5 and A5 on the ventral side; note the cortex thickness variation between B4 and B5. A1, A3, A4, A6, B1, B4, B5 in polarized light and A2, A5, B2, B3 in normal transmitted light. Abbreviations: an, annulus; ec, erosion cavity; pmr, perimedullary region; pos, primary osteon; sos, secondary osteon; zo, zone.
Fig. 13. Secondary growth bordering a in The Mammals Of Paracou, French Guiana: A Neotropical Lowland Rainforest Fauna Part 2. Nonvolant Species
Fig. 13. Secondary growth bordering a narrow dirt road through our study area at Paracou. Our only specimen of Gracilinanus emiliae was taken in this habitat, but primary forest occurs only a few meters away and it is not known which successional stage is typical of this rarely collected species. More commonly encountered inhabitants of secondary growth at Paracou include Didelphis marsupialis, Marmosa murina, Micoureus demerarae, Philander opossum, Dasypus novemcinctus, Saguinas midas, Potos flavus, Neacomys paracou, Oligoryzomys fulvescens, Oryzomys megacephalus, and Proechimys cuvieri.
Modelling seasonal dynamics of secondary growth in R
Open the record for dataset details and reuse information.
X-ray imaging of 30 year old wine grape wood reveals cumulative impacts of rootstocks on scion secondary growth and harvest index
Open the record for dataset details and reuse information.
Data from: An Early Devonian actinostelic euphyllophyte with secondary growth from the Emsian of Gaspé (Canada) and the importance of tracheid wall thickening patterns in early euphyllophyte systematics
<p>Secondary growth is a tracheophyte structural feature whose earliest known occurrence dates to the late Pragian-early Emsian. <i>Armoricaphyton</i>, <i>Franhueberia</i> and an unnamed plant from eastern Canada represent the only instances of secondary growth documented to date for the Early Devonian. Here, we describe a new Early Devonian euphyllophyte exhibiting secondary growth, from the Emsian (c. 400-395 Ma) Battery Point Formation (Québec, Canada): <i>Gmujij</i> <i>tetraxylopteroides</i> gen. et sp. nov. is characterized by a mesarch actinostele with <i>Psilophyton</i>-type (P-type) tracheid wall thickenings and exhibits a new type of anatomical organization among Early Devonian wood-producing euphyllophytes. <i>Gmujij</i> differs from coeval euphyllophytes, but lack of data on branching patterns, reproductive structures and other traditional diagnostic features preclude classification among previously recognized euphyllophyte groups. We experiment with a numerical approach to tracheid size distributions, to compare <i>Gmujij</i> with younger euphyllophytes exhibiting secondary growth. Comparisons show similarity between <i>Gmujij</i> and aneurophytalean progymnosperms, such as <i>Tetraxylopteris</i>. However, its plesiomorphic P-type tracheids set apart<i> Gmujij</i> from younger actinostelic euphyllophytes, raising questions on the importance of tracheid thickening patterns as diagnostic characters separating major lineages. Answers to this question hinge on whether transitions between wall thickening patterns require simple or complex changes in developmental regulation, a matter that requires improved understanding of regulatory programs that determine tracheid thickening patterns. Irrespective of these, <i>Gmujij</i> adds a new component to the diversity of anatomically preserved plants known in the Early Devonian, an incompletely explored interval of tracheophyte anatomical diversification, contributing information that will help understanding of the evolutionary origins of secondary growth.</p>
Treatment With Recombinant Human Growth Hormone (GH) in Children With Short Stature Secondary to a Long Term Corticoid Therapy
ClinicalTrials.gov study NCT00174187. IPD Sharing: Not stated. Countries: 1. Publications: 1.
A higher tissue fraction of parenchyma in secondary xylem supports growth recovery of angiosperm trees after drought
Open the record for dataset details and reuse information.
Species-specific water-use characteristics of trees in old-growth and secondary tropical forests of Thailand
Open the record for dataset details and reuse information.
Tree cavity density is a limiting factor for a secondary cavity nester in second-growth Andean temperate rainforests
Open the record for dataset details and reuse information.
Data from: An Early Devonian actinostelic euphyllophyte with secondary growth from the Emsian of Gaspé (Canada) and the importance of tracheid wall thickening patterns in early euphyllophyte systematics
Open the record for dataset details and reuse information.
Data from: Do secondary forests act as refuges for old growth forest animals? Recovery of ant diversity in the Atlantic forest of Brazil
The extent to which secondary forests occupying degraded and abandoned lands provide suitable habitat for forest-adapted species is an important conservation issue in times of vanishing old growth forests. We used ants (Hymenoptera: Formicidae), a functionally important and diverse group of invertebrates, to investigate the recovery of soil taxa during secondary forest succession in the Atlantic Forest of Southern Brazil. We compared the resilience of epigeic vs. hypogeic ant assemblages. For this purpose we established 27 sites that encompassed a chronosequence from pastures to old growth forests on two contrasting soil types. Our results are based on a collection of 35 508 individuals in 40 genera. Richness and composition of ant assemblages in secondary forests have recovered slowly and have not approached conditions typical of old growth forests. The distribution of genera along the successional stages was arranged in a nested pattern where ant genera of younger successional stages were a subset of genera present in older stages. Edaphic conditions had no influence on the recovery process. Overall, richness of ants was lower at study sites with water-logged soils than at sites where soils did not exhibit hydromorphic properties. The hypogeic ant assemblage recovered more slowly than the epigeic assemblage. Our results show that secondary forests do not act as refuges for many forest-adapted animals which are currently restricted to discontinuous patches of old growth forest in the highly endangered Atlantic Forest of Brazil. Moreover, estimated recovery times of 50 to several hundred years suggest it would take much longer than previously presumed for complete recolonization.
The transcription factor PagLBD3 contributes to the regulation of secondary growth in Populus
<p>Lateral organ boundaries domain (LBD) genes encode plant-specific transcription factors that participate in regulating various developmental processes. In this study, we genetically characterized PagLBD3 as an important regulator of secondary growth in Populus. Overexpression of PagLBD3 increased stem secondary growth in Populus with significantly higher rate of cambial cells differentiated into phloem, while dominant repression of PagLBD3 significantly decreased the rate of cambial cells differentiated into phloem. Furthermore, we identified 1756 PagLBD3 genome-wide putative direct target genes (DTGs) through RNA sequencing (RNA-seq) coupled DNA affinity purification followed by sequencing (DAP-seq) assays. Gene Ontology analysis revealed that genes regulated by PagLBD3 were enriched in biological pathways regulating meristem development, xylem development, and auxin transport. Several central regulator genes for vascular development, including phloem intercalated with xylem (PXY), wuschel related homeobox4 (WOX4), Secondary Wall-Associated NAC Domain 1s (SND1-B2) and Vascular-Related NAC-Domain 6s (VND6-B1), were identified as PagLBD3 DTGs. Together, our results suggested that PagLBD3 and its DTGs form a complex transcriptional network to modulate cambium activity and phloem/xylem differentiation.</p>
Pentaerithrityl Tetranitrate (PETN) for Secondary Prevention of Intrauterine Growth Restriction
ClinicalTrials.gov study NCT03669185. IPD Sharing: UNDECIDED. Countries: 1. Publications: 2.
Data from: Do secondary forests act as refuges for old growth forest animals? Recovery of ant diversity in the Atlantic forest of Brazil
Open the record for dataset details and reuse information.
The transcription factor PagLBD3 contributes to the regulation of secondary growth in Populus
Open the record for dataset details and reuse information.
Secondary nucleation guided noncovalent synthesis of dendritic homochiral superstructures via growth on and from surface
<p>The <strong>file.zip</strong> contains the following files:</p> <p>1. <strong>Manuscript_experimental_data.xlsx</strong> --> The excel file contains the raw data about CD, absorption, secondary nucleation fitting data, IV characteristics and CPL sensing.</p> <p>2. <strong>phecore-phecore_rdf.dat</strong> --> Manuscript Figure 4(a): data regarding g(r) of phenyl core-core interactions</p> <p>3. <strong>D1.xyz</strong>, <strong>D2.xyz</strong>, <strong>D3.xyz</strong> --> Optimized lowest-energy dimer configuration of <strong><em>S</em>-G</strong> corresponding to Supplementary Figure 14(b)</p> <p>4. <strong>D4.xyz</strong>, <strong>D5.xyz</strong>, <strong>D6.xyz</strong> --> Optimized lowest-energy dimer configuration of <strong><em>S</em>-PDI</strong> corresponding to Supplementary Figure 14(b)</p> <p>5. <strong>inital_md_configuration_S-G_system.pdb</strong> and <strong>final_md_configuration_S-G_system.pdb</strong> are the initial and final configurations, respectively, correspond to the molecular dynamics simulation of a system where the <strong><em>S</em>-G</strong> oligomer is immersed in a solution of 15% CHCl3 in IPA.</p> <p>6. <strong>inital_md_configuration_S-PDI_system.pdb</strong> and <strong>final_md_configuration_S-PDI_system.pdb</strong> are the initial and final configurations, respectively, correspond to the molecular dynamics simulation of a system where the <strong><em>S</em>-PDI</strong> oligomer is immersed in a solution of 15% CHCl3 in IPA.</p>
Soil chemistry determines whether defensive plant secondary metabolites promote or suppress herbivore growth
<p><span>Plant secondary (or specialized) metabolites mediate important interactions in both the rhizosphere and the phyllosphere. If and how such compartmentalized functions interact to determine plant-environment interactions is not well understood. Here, we investigated how the dual role of maize benzoxazinoids as leaf defenses and root siderophores shapes the interaction between maize and a major global insect pest, the fall armyworm. We find that benzoxazinoids suppress fall armyworm growth when plants are grown in soils with very low available iron but enhance growth in soils with higher available iron. Manipulation experiments confirm that benzoxazinoids suppress herbivore growth under iron-deficient conditions and in the presence of chelated iron, but enhance herbivore growth in the presence of free iron in the growth medium. This reversal of the protective effect of benzoxazinoids is not associated with major changes in plant primary metabolism. Plant defense activation is modulated by the interplay between soil iron and benzoxazinoids but does not explain fall armyworm performance. Instead, increased iron supply to the fall armyworm by benzoxazinoids in the presence of free iron enhances larval performance. This work identifies soil chemistry as a decisive factor for the impact of plant secondary metabolites on herbivore growth. It also demonstrates how the multifunctionality of plant secondary metabolites drives interactions between abiotic and biotic factors, with potential consequences for plant resistance in variable environments. </span></p>
ScienceDex guides
Understand access before you commit
These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
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.