13 research outputs found
linear mixed effects model dataset
No full textContains data on Shannons index, simpsons, evenness, year of measurement, plot ID, and section within plot for running linear mixed effects model on R
Raw data all plots 1952-2017
No full textContains raw information on trees >10 cm DBH for each plot (i.e DYP 9) including
Tree ID, tree species, measurement year, diameter at breast height (1.3m),
calculated basal area, DBH size class, X and Y coordinates within plots (40m x 100m)
multivariate analyses codes
No full textContains R codes for running nMDS, betadisper, PERMANOVA, and pairwise adonis analyses
linear mixed effects model code
No full textContains R codes for running diversity indices and linear mixed effects mode
Raw data all plots understory 2017
No full textContains raw information on trees <10 cm DBH for each plot including:
Tree ID, tree species, DBH <10cm, plot number, measurement year
Without management interventions, endemic wet‐sclerophyll forest is transitioning to rainforest in World Heritage listed K’gari (Fraser Island), Australia
No full textWet‐sclerophyll forests are unique ecosystems that can transition to dry‐sclerophyll forests or to rainforests. Understanding of the dynamics of these forests for conser‐ vation is limited. We evaluated the long‐term succession of wet‐sclerophyll forest on World Heritage listed K'gari (Fraser Island)—the world's largest sand island. We re‐ corded the presence and growth of tree species in three 0.4 hectare plots that had been subjected to selective logging, fire, and cyclone disturbance over 65 years, from 1952 to 2017. Irrespective of disturbance regimes, which varied between plots, rain‐ forest trees recruited at much faster rates than the dominant wet‐sclerophyll forest trees, narrowly endemic species Syncarpia hillii and more common Lophostemon con‐ fertus. Syncarpia hillii did not recruit at the plot with the least disturbance and re‐ cruited only in low numbers at plots with more prominent disturbance regimes in the ≥10 cm at breast height size. Lophostemon confertus recruited at all plots but in much lower numbers than rainforest trees. Only five L. confertus were detected in the smallest size class (<10 cm diameter) in the 2017 survey. Overall, we find evidence that more pronounced disturbance regimes than those that have occurred over the past 65 years may be required to conserve this wet‐sclerophyll forest, as without in‐ tervention, transition to rainforest is a likely trajectory. Fire and other management tools should therefore be explored, in collaboration with Indigenous landowners, to ensure conservation of this wet‐sclerophyll forest
The Circular Phosphorus Economy: Agronomic Performance of Recycled Fertilizers and Target Crops
No full textABSTRACTBackgroundThe circular phosphorus (P) economy addresses economic and environmental penalties inherent to the current linear P economy. Phosphorus sources recovered from waste steams (recyclates) offer an alternative to conventional fertilizers.AimThis research aimed to assess the agronomic performance of P recyclates derived from wastewater (hazenite, struvite), treated sewage sludge ash (SSA) and compost (FOGO food organics/garden organics) with crops previously characterized for P use efficiency (PUE).MethodsPhosphorus was supplied as granules and benchmarked against conventional fertilizers or mineral solution. Grown in controlled conditions, crops received recyclates individually or as amalgamates, with or without additional water‐soluble P. We quantified P uptake, yield and phytate content, and calculated agronomic performance indicators.ResultsResults revealed that (1) crop genotypes with purportedly lower or higher PUE showed similar performance when grown with limiting P supply and/or less soluble P recyclates, (2) crop performance improved when less soluble P recyclates were combined with water‐soluble P, (3) crops produced similar yield and biomass when supplied with an organo‐mineral formulation, hazenite, or conventional fertilizer, (4) grain accumulated higher levels of the antinutrient phytate with excess soluble P.ConclusionWe conclude that suitably formulated P recyclates can supplement or replace conventional fertilizers, and that fertilizer design should consider the solubility of recyclates and a crop's ability to access less soluble P. This adds to the growing body of evidence that well‐formulated next‐generation fertilizers can efficiently nourish crops. Integrating insights from controlled experiments and field trials is a cost‐effective strategy to actualize the circular P economy
Above-ground woody biomass and crown data for environmental plantings in Victoria Australia, sampled in 2022-2023 - Site info
No full textThis dataset stores measurements from two field campaigns in 20 environmental plantings aged 4–35 years old in Australia where stem diameters, crown radii, and heights of individual trees and shrubs were collected, and above- and below-ground woody biomass (AGB, BGB) were calculated. The first measurement was undertaken by The University of Melbourne in collaboration with Land Life Company between March and June 2022 covering 14 sites aged 21-35 years in Victoria, Australia. The purpose of this field campaign was to re-evaluate the biomass carbon stock of sites previously assessed in 2000 by CSIRO within the stem diameter database (SDD; Paul et al. 2020). For each site, to ensure representative coverage, the sampling area was divided into equal-sized sectors and within each sector a random transect of 0.05 ha (100 m length by 5 m width) was laid out based on a restricted random sampling design. Two to five transects were measured per site, depending on either sampling 10% of the area or meeting Australian recommendations for minimum stem numbers for the planting configuration. In total, the dataset contains 48 transects and 4703 unique tree or shrub measurements. The second field campaign was undertaken by Land Life Company between June and July 2023 covering six environmental planting sites aged 4-23 years in Victoria, Australia. The purpose of this campaign was to collect crown data in two directions (perpendicular and parallel to the seeding line). For each site, 14-20 transects of 20 m length were measured (following the seeding line and avoiding gaps or areas of dead plants). In total, the data contains 108 transects and 1341 unique tree and shrub measurements
Above-ground woody biomass and crown data for environmental plantings in Victoria Australia, sampled in 2022-2023 - Crown and biomass data
No full textThis dataset stores measurements from two field campaigns in 20 environmental plantings aged 4–35 years old in Australia where stem diameters, crown radii, and heights of individual trees and shrubs were collected, and above- and below-ground woody biomass (AGB, BGB) were calculated. The first measurement was undertaken by The University of Melbourne in collaboration with Land Life Company between March and June 2022 covering 14 sites aged 21-35 years in Victoria, Australia. The purpose of this field campaign was to re-evaluate the biomass carbon stock of sites previously assessed in 2000 by CSIRO within the stem diameter database (SDD; Paul et al. 2020). For each site, to ensure representative coverage, the sampling area was divided into equal-sized sectors and within each sector a random transect of 0.05 ha (100 m length by 5 m width) was laid out based on a restricted random sampling design. Two to five transects were measured per site, depending on either CSIRO last measurement plots or to optimize for the project's resources. In total, the dataset contains 48 transects and 4703 unique tree or shrub measurements. Stem diameters were measured with a diameter tape (>10 cm) or a stepped diameter gauge (<10 cm), and height (measured with a laser hypsometer) and crown radius (estimated using a measuring tape) were assessed for only a few representative trees (selected to encompass the full diameter range). The second field campaign was undertaken by Land Life Company between June and July 2023 covering six environmental planting sites aged 4-23 years in Victoria, Australia. The purpose of this campaign was to collect crown data in two directions (perpendicular and parallel to the seeding line). For each site, 14-20 transects of 20 m length were measured (following the seeding line and avoiding gaps or areas of dead plants). In total, the data contains 108 transects and 1341 unique tree and shrub measurements. Crown radius was measured with a tape for each tree or shrub and in addition, stem diameter (measured with a caliper) and height (measured with a laser hypsometer) were also collected. For both datasets, to calculate AGB, stem diameters of multi-stem trees and shrubs were grouped into a single diameter equivalent using the equation of Penman et al. (2003), and then specific plant functional type (PFT) allometric equations (Paul et al. 2015, Paul et al. 2018) were used to derive above and below-ground biomass
Above-ground woody biomass and crown data for environmental plantings in Victoria Australia, sampled in 2022-2023
No full textThis dataset stores measurements from two field campaigns in 20 environmental plantings aged 4–35 years old in Australia where stem diameters, crown radii, and heights of individual trees and shrubs were collected, and above- and below-ground woody biomass (AGB, BGB) were calculated. The first measurement was undertaken by The University of Melbourne in collaboration with Land Life Company between March and June 2022 covering 14 sites aged 21-35 years in Victoria, Australia. The purpose of this field campaign was to re-evaluate the biomass carbon stock of sites previously assessed in 2000 by CSIRO within the stem diameter database (SDD; Paul et al. 2020). For each site, to ensure representative coverage, the sampling area was divided into equal-sized sectors and within each sector a random transect of 0.05 ha (100 m length by 5 m width) was laid out based on a restricted random sampling design. Two to five transects were measured per site, depending on either CSIRO last measurement plots or to optimize for the project's resources. In total, the dataset contains 48 transects and 4703 unique tree or shrub measurements. Stem diameters were measured with a diameter tape (>10 cm) or a Stepped diameter Gauge (<10 cm), and height (measured with a laser hypsometer) and crown radius (estimated using a measuring tape) were assessed for only a few representative trees (selected to encompass the full diameter range). The second field campaign was undertaken by Land Life Company between June and July 2023 covering six environmental planting sites aged 4-23 years in Victoria, Australia. The purpose of this campaign was to collect crown data in two directions (perpendicular and parallel to the seeding line). For each site, 14-20 transects of 20 m length were measured (following the seeding line and avoiding gaps or areas of dead plants). In total, the data contains 108 transects and 1341 unique tree and shrub measurements. Crown radius was measured with a tape for each tree or shrub and in addition, stem diameter (measured with a caliper) and height (measured with a laser hypsometer) were also collected. For both datasets, to calculate AGB, stem diameters of multi-stem trees and shrubs were grouped into a single diameter equivalent using the equation of Penman et al. (2003), and then specific plant functional type (PFT) allometric equations (Paul et al. 2015, Paul et al. 2018) were used to derive above and below-ground biomass
