{"type": "FeatureCollection", "features": [{"id": "10.1139/x88-221", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-25T16:19:13Z", "type": "Journal Article", "created": "2007-12-19", "title": "Biomass And Nutrients In Regenerating Woody Vegetation Following Whole-Tree And Conventional Harvest In A Northern Mixed Forest", "description": "<p> Biomass and nutrient contents of regenerating woody plants and litter fall were measured after a northern mixed conifer\uffe2\uff80\uff93hardwood forest was harvested by conventional and whole-tree methods. Before harvest, the central Ontario study site was occupied by a 95-year-old pine (Pinusresinosa, P. strobus) and aspen (Populustremuloides, P. grandidentata) stand growing on gently rolling, gravel-free outwash sands. Four years after harvest, aspen abundance increased 100-fold in both harvested areas, with higher densities after whole-tree harvest (WTH) (4.1\uffe2\uff80\uff82stems/m2) than after conventional harvest (CH) (2.7\uffe2\uff80\uff82stems/m2). No self-thinning of aspen occurred between 2 and 4 years after harvest. Total aboveground woody biomass accumulated at 2.0\uffe2\uff80\uff82t\uffe2\uff80\uffa2ha\uffe2\uff88\uff921\uffe2\uff80\uffa2year\uffe2\uff88\uff921 in the WTH area and 1.5\uffe2\uff80\uff82t\uffe2\uff80\uffa2ha\uffe2\uff88\uff921\uffe2\uff80\uffa2year\uffe2\uff88\uff921 in the CH area; the preharvest rate was 2.0\uffe2\uff80\uff82t\uffe2\uff80\uffa2ha\uffe2\uff88\uff921\uffe2\uff80\uffa2year\uffe2\uff88\uff921. Peak autumn litter production occurred earlier in the harvested areas than in an adjacent uncut area. Cycling of N and K in litter fall returned to preharvest rates after 4 years. Cycling of Ca in litter fall was lower after WTH than after CH. Vegetation uptake of N and K (litter fall plus woody biomass) in the harvested areas in year 4 exceeded the preharvest value. Increased N accumulation in woody biomass (3.0\uffe2\uff80\uff82kg\uffe2\uff80\uffa2ha\uffe2\uff88\uff921\uffe2\uff80\uffa2year\uffe2\uff88\uff921 before harvest, 10.6\uffe2\uff80\uff82kg\uffe2\uff80\uffa2ha\uffe2\uff88\uff921\uffe2\uff80\uffa2year\uffe2\uff88\uff921 after WTH) would place a relatively greater demand on forest floor N pools in the WTH than in the CH area owing to lack of N input in logging slash. Although WTH did not reduce initial rates of biomass production, Populus spp. had lower concentrations of N, Ca, and Mg in the WTH area than in the CH area. There may be a danger that WTH on less fertile sites in the region will produce dense, unproductive aspen stands with low rates of self-thinning. </p>", "keywords": ["0106 biological sciences", "Spermatophyta", "Angiosperms", "Broadleaves", "Forest litter", "Microorganisms", "Coniferopsida: Gymnospermae", "Gymnosperms", "01 natural sciences", "logging", "Dicots", "pines", "nutrients", "Spermatophytes", "Natural regeneration", "Plant nutrition", "Plantae", "Forest Sciences", "Vascular Plants", "biomass", "Stand characteristics", "Salicaceae: Dicotyledones", "thinning", "Soil morphology", "Cycling", "Forestry", "Pinus Resinosa Pinus Strobus Populus Tremuloides Populus Grandidentata Forest Biomass Energy Forest Products", "Plants", "15. Life on land", "Conifers", "Angiospermae", "composition", "whole tree logging", "nutrient reserves", "natural thinning", "measurement", "ecology"], "contacts": [{"organization": "Hendrickson, O.Q.", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.1139/x88-221"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Canadian%20Journal%20of%20Forest%20Research", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1139/x88-221", "name": "item", "description": "10.1139/x88-221", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1139/x88-221"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "1988-11-01T00:00:00Z"}}, {"id": "10.5061/dryad.0gb5mkkwr", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-25T16:21:22Z", "type": "Dataset", "title": "Data from: Soil carbon, nitrogen and phosphorus stoichiometry (C:N:P) in relation to conifer species productivity and nutrition across British Columbia perhumid rainforests", "description": "Temperate rainforest soils of the Pacific Northwest are often carbon (C)  rich and encompass a wide range in fertility reflecting varying nitrogen  (N) and phosphorus (P) availability.\u00a0 Soil resource stoichiometry  (C:N:P) may provide an effective measure of site nutrient status and help  refine species-dependent patterns in forest productivity across edaphic  gradients.\u00a0 We determined mineral soil and forest floor nutrient  concentrations across very wet (perhumid) rainforest sites of southwestern  Vancouver Island (Canada), and employed soil element ratios as covariates  in a long-term planting density trial to test their utility in defining  basal area growth response of four conifer species.\u00a0 There were  strong positive correlations in mineral soil C, N and organic P (Po)  concentrations, and close alignment in C:N and C:Po both among and between  substrates.\u00a0 Stand basal area after five decades was best  reflected by mineral soil and forest floor C:N but in either case included  a significant species-soil interaction.\u00a0 The conifers with  ectomycorrhizal fungi had diverging growth responses displaying either  competitive (Picea sitchensis) or stress-tolerant (Tsuga heterophylla,  Pseudotsuga menziesii) attributes, in contrast to a more generalist  response by an arbuscular mycorrhizal tree (Thuja plicata).\u00a0  Despite the consistent patterns in organic matter quality we found no  evidence for increased foliar P concentrations with declining element  ratios (C:Po or C:Ptotal) as we did for N.\u00a0 The often high C:Po  ratios (as much as 3000) of these soils may reflect a stronger  immobilization sink for P than N, which, along with ongoing sorption of  PO4-, could limit the utility of C:Po or N:Po to adequately reflect P  supply.\u00a0 The dynamics and availability of soil P to trees,  particularly as Po, deserves greater attention as many perhumid  rainforests were co-limited by N and P, or, in some stands, possibly P  alone.", "keywords": ["Conifers", "Canada", "British Columbia", "C:N:P stoichiometry", "15. Life on land", "Soil carbon"], "contacts": [{"organization": "Kranabetter, John Marty, Sholinder, Ariana, de Montigny, Louise,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.5061/dryad.0gb5mkkwr"}, {"rel": "self", "type": "application/geo+json", "title": "10.5061/dryad.0gb5mkkwr", "name": "item", "description": "10.5061/dryad.0gb5mkkwr", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.5061/dryad.0gb5mkkwr"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2019-10-25T00:00:00Z"}}, {"id": "10.5061/dryad.29mb7", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-25T16:21:22Z", "type": "Dataset", "title": "Data from: Growth and carbon relations of mature Picea abies trees under 5\u00a0years of free-air CO2 enrichment", "description": "unspecifiedPicea-FACE_synthesis_gas_exchangeNeedle gas exchange rates measured on 1-year-old needles in ambient (A) and elevated (E) trees at both ambient and elevated CO2 levels (400 and 550 ppm) during five summer field campaigns (18 June, 2 July, and 19 September 2013; 23 and 26 September 2014).", "keywords": ["Conifers", "elevated CO2", "height profile", "carbon isotopes", "Picea abies", "Face", "wood anatomy", "15. 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