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Vascular Territory template and atlases in MNI space
<p><strong>Data</strong></p> <p>Sixteen subjects (mean age (sd): 69.6 (8.2); 37.5% female) were recruited to generate a high-resolution template. The cohort consists of twelve stroke-free, non-demented patients with the sporadic form of cerebral amyloid angiopathy (CAA), and similarly-aged healthy controls (n=4). Each participant underwent high-resolution MRI with a Siemens Magnetom Prisma 3T scanner (using a 32-channel head coil) as part of a separate study. The standardized protocol included a Multiecho T1-weighted (voxel size: 1x1x1 mm<sup>3</sup>; Repetition Time [TR]: 2510 ms), a 3D-FLAIR (voxel size: 0.9x0.9x0.9 mm<sup>3</sup>; TR: 5000 ms; TE: 356 ms), and a T2-weighted Turbo Spin Echo (voxel size: 0.5x0.5x2.0 mm<sup>3</sup>; TR: 7500 ms; TE: 84 ms) sequence. Scans were manually assessed to ensure no gross pathology was present, such as hemorrhage or silent brain infarcts.</p> <p><strong>Template and territorial map creation</strong></p> <p>We employed Advanced Normalization Tools (ANTs) for image processing (Avants et al., 2010, 2011) for creating a brain template based on multimodal information using T1, T2 and 3D-FLAIR sequences. After template creation, we smoothed the resulting templates (FSL; Gaussian smoothing, sigma = 1) and registered the resulting templates into MNI space, again using ANTs (Avants et al., 2011).</p> <p>Vascular territories were outlined on the right hemisphere in the T1-weighted atlas image and contain anatomically validated ACA, MCA, and PCA territories supratentorially. The right hemispheric map was then mirrored onto the left hemisphere to create a full-brain vascular territory map, which was manually assessed and corrected where necessary.</p> <p> </p> <p>For more details, please see the original publication that utilized the template. If you utilize this template, please also cite</p> <p>Schirmer, Markus D., et al. "Spatial signature of white matter hyperintensities in stroke patients." <em>Frontiers in neurology</em> 10 (2019): 208.</p> <p><a href="https://doi.org/10.3389/fneur.2019.00208">https://doi.org/10.3389/fneur.2019.00208</a></p> <p> </p> <p><strong>Files</strong></p> <p><strong>FLAIR template</strong>: caa_flair_in_mni_template_smooth.nii.gz<br> <br> <strong>FLAIR template after brain extraction and intensity normalization</strong>: caa_flair_in_mni_template_smooth_brain_intres.nii.gz<br> <br> <strong>T1 template</strong>: caa_t1_in_mni_template_smooth.nii.gz 27.7 Mb<br> <br> <strong>T2 template</strong>: caa_t2_in_mni_template_smooth.nii.gz 27.7 Mb<br> <br> <strong>Vascular territory map</strong>: mni_vascular_territories.nii.gz</p>
Vascular plant community data for Northwest Territories, Canada
<p><span><span>Climate change is altering disturbance regimes outside of historical norms, which can impact biodiversity by selecting for plants with particular traits. The relative impact of disturbance characteristics on plant traits and community structure may be mediated by environmental gradients. We aimed to understand how wildfire impacted understory plant communities and plant regeneration strategies along gradients of environmental conditions and wildfire characteristics in boreal forests. We established 207 plots (60m<sup>2</sup>) in recently burned stands and 133 plots in mature stands with no recent fire history in comparable gradients of stand type, site moisture (drainage), and soil organic layer (SOL) depth in two ecozones in Canada's Northwest Territories. <a name="_Hlk43198784">At each plot, we recorded all vascular plant taxa in the understory</a> and measured the regeneration strategy (seeder, resprouter, survivor) in burned plots, along with seedbed conditions (mineral soil and bryophyte cover). Dispersal, longevity, and growth form traits were determined for each taxon. Fire characteristics measured included proportion pre-fire SOL combusted (fire severity), date of burn (fire seasonality), and pre-fire stand age (time following fire). Results showed understory community composition was altered by fire. However, burned and mature stands had similar plant communities in wet sites with deep SOL. In the burned plots, regeneration strategies were determined by fire severity, drainage, and pre- and post-fire SOL depth. Resprouters were more common in wet sites with deeper SOL and lower fire severity, while seeders were associated with drier sites with thinner SOL and greater fire severity. This led to drier burned stands being compositionally different from their mature counterparts and seedbed conditions were important. Our study highlights the importance of environment-wildfire interactions in shaping plant regeneration strategies and patterns of understory plant community structure across landscapes, and the overriding importance of SOL depth and site drainage in mediating fire severity, plant regeneration, and community structure.</span></span></p> <p> </p>
Vascular plant community data for Northwest Territories, Canada
Open the record for dataset details and reuse information.
Supplementary material 1 from: Saarela JM, Sokoloff PC, Gillespie LJ, Bull RD (2023) Vascular plant biodiversity of Katannilik Territorial Park, Kimmirut and vicinity on Baffin Island, Nunavut, Canada: an annotated checklist of an Arctic flora. PhytoKeys 217: 1-135. https://doi.org/10.3897/phytokeys.217.90573
Dataset of herbarium specimens documenting the vascular plant flora of Kattanilik Territorial Park and Kimmirut and vicinity, Baffin Island, Nunavut, Canada
Figure 9 from: Saarela JM, Sokoloff PC, Gillespie LJ, Bull RD, Bennett BA, Ponomarenko S (2020) Vascular plants of Victoria Island (Northwest Territories and Nunavut, Canada): a specimen-based study of an Arctic flora. PhytoKeys 141: 1-330. https://doi.org/10.3897/phytokeys.141.48810
Figure 9 AEquisetum arvense subsp. alpestre strobilus (left) and habit (right), Gillespie et al. 10109BEquisetum variegatum subsp. variegatum habit, Gillespie et al. 8499CCystopteris fragilis habit, Gillespie et al. 9990DDryopteris fragrans habit, Johansen Bay, 18 July 2008 EWoodsia glabella habit FWoodsia glabella habitat GTofieldia coccinea inflorescences, Kuujjua River, NT, 18 July 2010 HTofieldia coccinea habit, Gillespie et al. 9749. Photos A, C by L.J. Gillespie B, D, G by R.D. Bull H by J.M. Saarela and E, F by B.A. Bennett.
Figure 76 from: Saarela JM, Sokoloff PC, Gillespie LJ, Bull RD, Bennett BA, Ponomarenko S (2020) Vascular plants of Victoria Island (Northwest Territories and Nunavut, Canada): a specimen-based study of an Arctic flora. PhytoKeys 141: 1-330. https://doi.org/10.3897/phytokeys.141.48810
Figure 76 ATaraxacum hyparcticum habit (left), Gillespie et al. 9746, inflorescences (right), Saarela & Bull 1441BTaraxacum phymatocarpum habit, Gillespie et al. 9698CTaraxacum scopulorum habit, Gillespie et al. 9835DTephroseris frigida habitat (left) and habit (right), Minto Inlet, NT, 25 July 2010 ETephroseris palustris subsp. congesta habit FTephroseris palustris subsp. congesta habitat, Gillespie et al. 8195GTripleurospermum maritimum subsp. phaeocephalum habit, Gillespie et al. 8215. Photos A left, C, F by L.J. Gillespie, and A right, B, D, E, G by R.D. Bull.
Figure 75 from: Saarela JM, Sokoloff PC, Gillespie LJ, Bull RD, Bennett BA, Ponomarenko S (2020) Vascular plants of Victoria Island (Northwest Territories and Nunavut, Canada): a specimen-based study of an Arctic flora. PhytoKeys 141: 1-330. https://doi.org/10.3897/phytokeys.141.48810
Figure 75 AHulteniella integrifolia habit, Minto Inlet, NT, 2 July 2010 BPetasites frigidus subsp. frigidus habit (left), inflorescence, (upper right) and basal leaf (lower right), Gillespie et al. 9752CSymphyotrichum pygmaeum habit, Gillespie et al. 9883DSymphyotrichum pygmaeum habitat, Gillespie et al. 9883ETaraxacum ceratophorum habit, Gillespie et al. 9745FTaraxacum ceratophorum inflorescence, Gillespie et al. 9745. Photos A, C by R.D. Bull and B, D–F by L.J. Gillespie.
Figure 74 from: Saarela JM, Sokoloff PC, Gillespie LJ, Bull RD, Bennett BA, Ponomarenko S (2020) Vascular plants of Victoria Island (Northwest Territories and Nunavut, Canada): a specimen-based study of an Arctic flora. PhytoKeys 141: 1-330. https://doi.org/10.3897/phytokeys.141.48810
Figure 74 Species distribution maps. Asteraceae: AErigeron porsildiiBEurybia sibiricaCHulteniella integrifoliaDPetasites frigidus subsp. frigidusESenecio lugensFSymphyotrichum pygmaeumGTaraxacum ceratophorumHTaraxacum holmenianumITaraxacum hyparcticumJTaraxacum phymatocarpumKTaraxacum scopulorumLTephroseris frigida.
Figure 8 from: Saarela JM, Sokoloff PC, Gillespie LJ, Bull RD, Bennett BA, Ponomarenko S (2020) Vascular plants of Victoria Island (Northwest Territories and Nunavut, Canada): a specimen-based study of an Arctic flora. PhytoKeys 141: 1-330. https://doi.org/10.3897/phytokeys.141.48810
Figure 8 Species distribution maps. Lycopodiaceae: AHuperzia arctica. Equisetaceae: BEquisetum arvense subsp. alpestreCEquisetum scirpoidesDEquisetum variegatum subsp. variegatum. Cystopteridaceae: ECystopteris fragilis. Woodsiaceae: FWoodsia glabella. Dryopteridaceae: GDryopteris fragrans. Tofieldiaceae: HTofieldia coccineaITofieldia pusilla. Potamogetonaceae: JStuckenia filiformisKStuckenia vaginata. Orchidaceae: LCorallorhiza trifida.
Figure 71 from: Saarela JM, Sokoloff PC, Gillespie LJ, Bull RD, Bennett BA, Ponomarenko S (2020) Vascular plants of Victoria Island (Northwest Territories and Nunavut, Canada): a specimen-based study of an Arctic flora. PhytoKeys 141: 1-330. https://doi.org/10.3897/phytokeys.141.48810
Figure 71 Species distribution maps. Asteraceae: AAntennaria friesiana subsp. friesianaBAntennaria media subsp. compactaCAntennaria monocephala subsp. angustataDArnica angustifolia subsp. angustifoliaEArtemisia borealis subsp. borealisFArtemisia borealis subsp. richardsonianaGArtemisia hyperboreaHArtemisia tilesiiIAskellia pygmaeaJErigeron compositusKErigeron eriocephalusLErigeron humilis.
Figure 72 from: Saarela JM, Sokoloff PC, Gillespie LJ, Bull RD, Bennett BA, Ponomarenko S (2020) Vascular plants of Victoria Island (Northwest Territories and Nunavut, Canada): a specimen-based study of an Arctic flora. PhytoKeys 141: 1-330. https://doi.org/10.3897/phytokeys.141.48810
Figure 72 AAntennaria media subsp. compacta habit, Gillespie et al. 9622BAntennaria media subsp. compacta basal rosettes, Gillespie et al. 9622CAntennaria monocephala subsp. angustata inflorescences DArnica angustifolia subsp. angustifolia habit, Gillespie et al. 9607EArtemisia tilesii inflorescence FArtemisia tilesii habit. Photos A, B by L.J. Gillespie C, E, F by B.A. Bennett and D by R.D. Bull.
Figure 7 from: Saarela JM, Sokoloff PC, Gillespie LJ, Bull RD, Bennett BA, Ponomarenko S (2020) Vascular plants of Victoria Island (Northwest Territories and Nunavut, Canada): a specimen-based study of an Arctic flora. PhytoKeys 141: 1-330. https://doi.org/10.3897/phytokeys.141.48810
Figure 7 Species discovery curves for six sites that were intensively surveyed by Gillespie et al. for vascular plant biodiversity in 2008 (Johansen Bay, Oterkvik Point, Sinclair Creek) and 2010 (Boot Inlet, Kuujjua River, the head of Minto Inlet).
Figure 69 from: Saarela JM, Sokoloff PC, Gillespie LJ, Bull RD, Bennett BA, Ponomarenko S (2020) Vascular plants of Victoria Island (Northwest Territories and Nunavut, Canada): a specimen-based study of an Arctic flora. PhytoKeys 141: 1-330. https://doi.org/10.3897/phytokeys.141.48810
Figure 69 Species distribution maps. Orobanchaceae: ACastilleja elegansBCastilleja caudataCPedicularis albolabiataDPedicularis arctoeuropaeaEPedicularis capitataFPedicularis hirsutaGPedicularis lanataHPedicularis langsdorffii subsp. arctica.
Figure 70 from: Saarela JM, Sokoloff PC, Gillespie LJ, Bull RD, Bennett BA, Ponomarenko S (2020) Vascular plants of Victoria Island (Northwest Territories and Nunavut, Canada): a specimen-based study of an Arctic flora. PhytoKeys 141: 1-330. https://doi.org/10.3897/phytokeys.141.48810
Figure 70 ACastilleja elegans habit, Gillespie et al. 9822BCastilleja elegans habit (left) and inflorescence (right), Gillespie et al. 9606CPedicularis albolabiata habit, Gillespie et al. 7792DPedicularis arctoeuropaea habit, Gillespie et al. 9628EPedicularis arctoeuropaea habitat, Gillespie et al. 9628FPedicularis capitata habit, Gillespie et al. 9992GPedicularis lanata habit, Kuujjua River, NT, 15 July 2010. Photos A, C–E by L.J. Gillespie and B, F, G by R.D. Bull.
Figure 68 from: Saarela JM, Sokoloff PC, Gillespie LJ, Bull RD, Bennett BA, Ponomarenko S (2020) Vascular plants of Victoria Island (Northwest Territories and Nunavut, Canada): a specimen-based study of an Arctic flora. PhytoKeys 141: 1-330. https://doi.org/10.3897/phytokeys.141.48810
Figure 68 AGalium aparine habit, Saarela and Teeter 5295BGentianella propinqua subsp. propinqua habit, Gillespie et al. 9619CLomatogonium rotatum subsp. rotatum habit, Gillespie et al. 8109DMertensia maritima subsp. tenella habitat, Saarela & Bull 1469EHippuris lanceolata habit, Johansen Bay, NU, 18 July 2008 FPlantago canescens habit, Gillespie et al. 8103. Photos A, B, D by J.M. Saarela and C, E, F by R.D. Bull.
Figure 67 from: Saarela JM, Sokoloff PC, Gillespie LJ, Bull RD, Bennett BA, Ponomarenko S (2020) Vascular plants of Victoria Island (Northwest Territories and Nunavut, Canada): a specimen-based study of an Arctic flora. PhytoKeys 141: 1-330. https://doi.org/10.3897/phytokeys.141.48810
Figure 67 Species distribution maps. Rubiaceae: AGalium aparine. Gentianaceae: BGentianella propinqua subsp. propinquaCLomatogonium rotatum subsp. rotatum. Boraginaceae: DMertensia drummondiiEMertensia maritima subsp. tenella. Plantaginaceae: FHippuris lanceolataGPlantago canescens. Lentibulariaceae: HPinguicula vulgaris subsp. vulgaris.
Figure 66 from: Saarela JM, Sokoloff PC, Gillespie LJ, Bull RD, Bennett BA, Ponomarenko S (2020) Vascular plants of Victoria Island (Northwest Territories and Nunavut, Canada): a specimen-based study of an Arctic flora. PhytoKeys 141: 1-330. https://doi.org/10.3897/phytokeys.141.48810
Figure 66 ARhododendron tomentosum subsp. decumbens habitat, Gillespie et al. 7849BRhododendron tomentosum subsp. decumbens habit, Gillespie et al. 7849CRhododendron tomentosum subsp. decumbens inflorescence, Gillespie et al. 7849DVaccinium uliginosum habit EVaccinium vitis-idaea subsp. minus habit, Gillespie et al. 8037. Photos A, B, C by L.J. Gillespie D by B.A. Bennett and E by R.D. Bull.
Figure 73 from: Saarela JM, Sokoloff PC, Gillespie LJ, Bull RD, Bennett BA, Ponomarenko S (2020) Vascular plants of Victoria Island (Northwest Territories and Nunavut, Canada): a specimen-based study of an Arctic flora. PhytoKeys 141: 1-330. https://doi.org/10.3897/phytokeys.141.48810
Figure 73 AAskellia pygmaea habit, Gillespie et al. 10087BErigeron compositus habit, Gillespie et al. 9832CErigeron eriocephalus habit, Gillespie et al. 10189DErigeron eriocephalus inflorescences, Gillespie et al. 10189EErigeron humilis habit, Gillespie et al. 8087FErigeron humilis inflorescence, Gillespie et al. 8087. Photos A, C–F by R.D. Bull and B by L.J. Gillespie.
Figure 77 from: Saarela JM, Sokoloff PC, Gillespie LJ, Bull RD, Bennett BA, Ponomarenko S (2020) Vascular plants of Victoria Island (Northwest Territories and Nunavut, Canada): a specimen-based study of an Arctic flora. PhytoKeys 141: 1-330. https://doi.org/10.3897/phytokeys.141.48810
Figure 77 Species distribution maps. Asteraceae: ATephroseris palustris subsp. congestaBTripleurospermum maritimum subsp. phaeocephalum.
Figure 65 from: Saarela JM, Sokoloff PC, Gillespie LJ, Bull RD, Bennett BA, Ponomarenko S (2020) Vascular plants of Victoria Island (Northwest Territories and Nunavut, Canada): a specimen-based study of an Arctic flora. PhytoKeys 141: 1-330. https://doi.org/10.3897/phytokeys.141.48810
Figure 65 AArctous rubra habitat, Gillespie et al. 9884BArctous rubra habit, Gillespie et al. 7714CCassiope tetragona subsp. tetragona habit, Oterkvik Point, NU, 3 July 2008 DOrthilia secunda subsp. obtusata habit, Gillespie et al. 8712EPyrola grandiflora subsp. grandiflora habit, Gillespie et al. 7967FRhododendron lapponicum Kuujjua River, NT, 16 July 2010. Photos A, B by L.J. Gillespie C, D, F by R.D. Bull and E by P.C. Sokoloff.
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