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7 results for “greenfall”
Litterfall on the elevational gradient (Group 4) with a focus on greenfall from the Coweeta Hydrologic Laboratory in 1995
Null Hypothesis: Litterfall weights not statistically different between plots on the altitudinal gradient.
Nematode total numbers in greenfall and litterfall exclusion quadrat treatments on canopy plots in 1998
Numbers of nematodes per gram dry weight of litter are reported from litterbags placed in quadrat treatment boxes on canopy gradient sites. Treatments for this project are greenfall exclusion and litterfall exclusion. See Reynolds 2000 dissertation, Effects of canopy herbivores on soil systems along an elevation gradient. All data are from collections made in 1998.
Greenfall litter decomposition of three common species in the northern Chihuahuan Desert, 2010-2012
Soil organic carbon (SOC) is derived primarily from the decomposition of plant biomass. Animals that create greenfall, or green leaf litter, influence SOC dynamics by altering the phenological condition and, therefore, nutrient quality of plant litter. Animals that transport greenfall to a microsite with different microhabitat conditions from those where senesced litter would typically be found also influence SOC dynamics by altering the prevalence of various decomposition drivers. Microsite differences are particularly pronounced in arid and semi-arid ecosystems with heterogeneous vegetation cover. We investigated differences in decomposition between greenfall and senesced litter of three common Chihuahuan Desert plants from which animals frequently generate greenfall (Larrea tridentata, Sporobolus flexuosus, Yucca elata), using a litterbag study to quantify differences in mass, carbon (C), and nitrogen (N) losses between green and senesced leaves placed in shrub intercanopy and subcanopy microsites in a desert shrubland. We hypothesized that decomposition would be more rapid in 1) greenfall than naturally senesced litter, because of the higher nutrient concentration in green than senesced leaves, and 2) in intercanopy than shrub subcanopy microsites, because of increased exposure to decomposition drivers like soil-litter mixing and photodegradation in the less vegetated open area between shrub canopies. Using a litterbag study, we quantified differences in litter mass, C, and N losses between green and senesced leaves placed in shrub subcanopy and intercanopy (open) microsites. Measured variables include litter mass and litter ash, carbon, and nitrogen content. We found that there were significant differences in the nutrient concentration of green and senesced leaves of the same species, and that both litter condition and microsite affected decomposition rate. For two of the three litter species, greenfall decomposed more rapidly than senesced litter, and for all
Fig. 4 in Effects of Greenfall on Ground-dwelling Arthropods in a Subtropical Forest
Fig. 4. NMDS biplot of arthropod communities in response to Typhoon Soulik. (a) Control plots, (b) Greenfall plots. The number '0' denotes a plot before Typhoon Soulik (24 June-7 July) and '1' a plot after Typhoon Soulik (7 July-24 July). The unfilled and filled convex polygons denote the 'before-Soulik' and 'after-Soulik' periods respectively. Although the NMDS was performed on all 40 sample units (20 plots × two time periods), the biplot is drawn for the control and greenfall plots separately to enhance visual clarity. The scale and range of the axes are comparable between the control and green plots.
Fig. 3 in Effects of Greenfall on Ground-dwelling Arthropods in a Subtropical Forest
Fig. 3. NMDS biplot of arthropod communities in response to greenfall addition. (a) Pre-treatment, 12 May-7 July, (b) Post-treatment time period #1, 24 July-10 October, (c) Posttreatment time period #2, 10 October-27 December. The letter 'C' denotes a control plot and 'G' a greenfall plot. The unfilled and filled convex polygons denote the control and greenfall plots, respectively. Although the NMDS was performed on all 60 sample units (20 plots × three time periods), the biplot is drawn for each time period to enhance visual clarity. The scale and range of the axes are comparable across the three time periods.
Fig. 1 in Effects of Greenfall on Ground-dwelling Arthropods in a Subtropical Forest
Fig. 1. Activity-density and biomass of six arthropod taxa in response to greenfall addition. The greenfall plots (gray bars) received greenfall addition during the two post-treatment periods (post-treatment time period #1: 24 July-10 October, post-treatment time period #2: 10 October-27 December). The pre-treatment period is 12 May-7 July. The control plots (white bars) did not received greenfall addition in any of three time periods. The asterisks denote significant differences in arthropod activity-density between greenfall and control plots for a given time period.
Fig. 2 in Effects of Greenfall on Ground-dwelling Arthropods in a Subtropical Forest
Fig. 2. Activity-density and biomass of six arthropod taxa in response to Typhoon Soulik. The white and gray bars denote the 'before Soulik' (24 June-7 July) and 'after Soulik' (7 July-24 July) periods, respectively. The arthropod data were pooled across all 20 plots, including the control and greenfall plots. Both the control and greenfall plots received the greenfall and other impacts from Typhoon Soulik during 'after Soulik' period. The greenfall plots received additional greenfall during both 'before Soulik' and 'after Soulik' periods. The asterisks denote significant differences in activity-density or biomass of the arthropods before and after Typhoon Soulik.
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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
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.