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67 results for “woody debris”
Far northeastern Siberia boreal forest data: Coarse woody debris abundance across a larch forest density gradient
This dataset includes coarse woody debris abundance within four larch stands near Cherskii, Siberia collected in 2012-2013. Data have not been published.
Far northeastern Siberia boreal forest data: Fine woody debris abundance across a larch forest density gradient
This dataset includes fine woody debris abundance within four larch stands near Cherskii, Siberia collected in 2012-2013. Data have not been published.
Interior Alaska managed sites: downed woody debris measured one time in either summer 2012 or 2013
This dataset contains counts of fine woody debris collected along transects measured at a suite of managed and unmanaged areas in interior Alaska in summers 2012 and 2013. Dataset also includes diameters of large (>=7cm diameter) downed woody debris pieces.
Coarse Woody Debris of the Ice Storm Experiment (ISE) plots at the Hubbard Brook Experimental Forest
The ice storm experiment was a novel experimental approach creating a suite of ice storms in a mature hardwood forest in New Hampshire, USA. The experiment included five ice storm intensities (0, 6.4, 12.7, and 19.1 mm radial ice accretion) applied in a single year, and one ice storm intensity (12.7 mm) applied in two consecutive years. This dataset quantifies the coarse woody debris transferred from the forest canopy to the soil under the different icing conditions. In this forest, little damage occurred below 6.4 mm radial ice accretion, moderate damage occurred with up to 12.7 mm of accretion, and significant branch breakage and canopy damage occurred with 19.1 mm of ice. The icing in consecutive years demonstrated an interactive effect of ice storm frequency and severity such that some branches damaged in the first year of icing appeared to remain in the canopy and then fall to the ground in the second year of icing. These results have implications for National Weather Service ice storm warning levels, and they provide a quantitative assessment of ice-load related inputs of forest debris that will be useful to municipalities creating response plans for current and future ice storms. These data were gathered as part of the Hubbard Brook Ecosystem Study (HBES). The HBES is a collaborative effort at the Hubbard Brook Experimental Forest, which is operated and maintained by the USDA Forest Service, Northern Research Station.
Woody debris removal modifies carbon stocks and soil properties in a fragmented tropical rainforest
<p>We examined whether and how woody debris removal for domestic fuel affects carbon storage and soil properties in an Indian rainforest. Fuelwood removal reduced aboveground carbon stocks, increased soil bulk density, and possibly reduced soil phosphorus stocks. Equitably balancing this subtle trade-off between climate-regulating and vital, widely-utilized provisioning functions, is a challenge for tropical forest research and management.</p>
Extracted sequences of fungal OTUs on coarse woody debris Bavarian Forest
<p>Extarcted sequences of fungal communities in coarse woody debris, sampled in the Bavarain Forest, Germany, in 2012, 2013 and 2015. A deadwood experiment with 67 stems (length 5m, dia ~33cm; 34x <em>Fagus sylvatica</em> and 33x <em>Abies alba</em>) was established in 2011. Per sampling year four drilling cores per stem were collected and pooled. PCR was performed on ITS2 region using barcoded gITS7 and ITS4. Treatment describes whether it is an experimentally created forest gap or a closed canopy. Taxonomic information and community composition only references to the most abundant OTUs used in Rieker et al. (2024): How to best detect threatened deadwood fungi – comparing metabarcoding and fruit body surveys. <em>Biological Conservation.</em></p> <p>Sample collection and processing are further described in</p> <p>Rieker et al. (2024): How to best detect threatened deadwood fungi – comparing metabarcoding and fruit body surveys. <em>Biological Conservation.</em></p> <p>and lab protocols follow Baldrian et al. (2016): Fungi associated with decomposing deadwood in a natural beech-dominated forest. <em>Fungal ecology, 23, 109-122.</em></p>
Coarse woody debris accelerates the decomposition of deadwood inputs across temperate forest
<p class="MsoNormal">Wood decomposition is regulated by multiple controls, including climate and wood traits, that vary at local to regional scales. Yet decomposition rates differ dramatically when these controls do not. Fungal community dynamics are often invoked to explain these differences, suggesting that knowledge of ecosystem properties that influence fungal communities will improve understanding and projection of wood decomposition. We hypothesize that deadwood inputs decompose faster in forests with higher stocks of downed coarse woody material (CWM) because CWM is a resource from which lignocellulolytic fungi rapidly colonize new inputs. To test this hypothesis, we measure decomposition of 1,116 pieces of fine woody material (FWM) of five species, incubated for 13 to 49 months at five locations spanning 10°-latitude in eastern U.S. forest. We place FWM pieces near and far from CWM across observational transects and experimental common gardens. Soil temperature positively affects location-level mean decomposition rates, but these among-location differences are smaller than within-location variation in decomposition. Some of this variability is caused by CWM, where FWM pieces next to CWM decompose more rapidly. These effects are greater with time of incubation and lower initial wood density of FWM. The effect size of CWM is of the same relative magnitude as for the known controls of temperature, deadwood density and diameter. Abundance data for CWM is available for many forests and hence may be an ecosystem variable amenable for inclusion in decomposition models. Our findings suggest that conservation efforts to rebuild depleted CWM stocks in temperate forests may accelerate decomposition of fresh deadwood inputs.</p>
Coarse woody debris accelerates the decomposition of deadwood inputs across temperate forest
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Data from: Fungal and beetle diversity in deciduous fine woody debris in spruce-dominated forests in relation to substrate quantity and quality
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Data from: Temporal dynamics of bark and wood functional traits in determining invertebrate communities during coarse and fine woody debris decomposition
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Data from: Coarse woody debris decomposition along an elevation gradient alleviates soil microbial P limitation but intensifies C limitation at Wuyishan National Park
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Woody debris removal modifies carbon stocks and soil properties in a fragmented tropical rainforest
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Downed Woody Debris measured in study plots at the Murphy Dome study site
This file contains estimates of fine and coarse woody debris present in study plots.
Coarse Woody Debris on Watershed 6, Hubbard Brook Experimental Forest
Fallen dead wood was sampled in Watershed 6 (W6) of the Hubbard Brook Experimental Forest in 1978, 1995, and 2016. Two techniques, one for bolewood >3 cm in diameter and one for fallen twigs <3 cm and > 2 mm, were combined to determine the mass of fallen dead wood in the forest. The mass of deadwood in the forest remained unchanged over time, although the species composition did change. These data were gathered as part of the Hubbard Brook Ecosystem Study (HBES). The HBES is a collaborative effort at the Hubbard Brook Experimental Forest, which is operated and maintained by the USDA Forest Service, Northern Research Station.
Data from: Decomposition of coarse woody debris in a long-term litter manipulation experiment: a focus on nutrient availability
1.The majority of aboveground carbon in tropical forests is stored in wood, which is returned to the atmosphere during decomposition of coarse woody debris. However, the factors controlling wood decomposition have not been experimentally manipulated over time scales comparable to the length of this process. 2.We hypothesized that wood decomposition is limited by nutrient availability and tested this hypothesis in a long-term litter addition and removal experiment in a lowland tropical forest in Panama. Specifically, we quantified decomposition using a 15 year chronosequence of decaying boles, and measured respiration rates and nutrient limitation of wood decomposer communities. 3.The long-term probability that a dead tree completely decomposed was decreased in plots where litter was removed, but did not differ between litter addition and control treatments. Similarly, respiration rates of wood decomposer communities were greater in control treatments relative to litter removal plots; litter addition treatments did not differ from either of the other treatments. Respiration rates increased in response to nutrient addition (nitrogen, phosphorus, and potassium) in the litter removal and addition treatments, but not in the controls. 4.Established decreases in concentrations of soil nutrients in litter removal plots and increased respiration rates in response to nutrient addition suggest that reduced rates of wood decomposition after litter removal were caused by decreased nutrient availability. The effects of litter manipulations differed directionally from a previous short-term decomposition study in the same plots, and reduced rates of bole decomposition in litter removal plots did not emerge until after more than 6 years of decomposition. These differences suggest that litter-mediated effects on nutrient dynamics have complex interactions with decomposition over time.
Data from: Regeneration processes on coarse woody debris in mixed forests: do tree germinants and seedlings have species-specific responses when grown on coarse woody debris?
Tree regeneration on coarse woody debris (CWD) is considered to be one the most ecologically valuable aspects of CWD in forest systems. However, most studies have focused solely on uncovering the differences in establishment and growth on CWD (regarded as a homogeneous substrate) in comparison with the forest floor. Our study concentrates on the underlying mechanisms of germinant and seedling colonization patterns and demographic responses relative to various properties of CWD. We analysed the effects of CWD properties (decay class, form, species and diameter) on: (i) germinant and seedling annual counts; (ii) annual germinant and seedling survival; and (iii) seedling growth and height. Our study comprised three species (beech, fir and spruce) over 7-year span in two old-growth stands in the Western Carpathians, and employed generalized linear models and mixed models to test for differences between species. CWD properties affected regeneration at the germination stage. There were some demographic differences between species relative to CWD properties. Decay class had the most pronounced effect on beech, not only on its establishment but also survival and growth. Beech and spruce established and survived in higher densities on beech CWD, while their height growth was enhanced on conifer-derived CWD, particularly on spruce CWD. Stumps enhanced establishment of all species and survival of conifer seedlings. Synthesis. Our study shows that CWD properties do influence seedling establishment, growth, height distribution and survival. Moreover, there may be trade-offs between seedling growth and survival among tree species growing on different species of CWD. This highlights the need to include CWD heterogeneity as a factor that can affect the role of CWD in regeneration in forest ecosystems.
Field measurements for estimating aboveground and woody debris biomass in Cajander larch forests of northeast Siberia
<p>This dataset contains field measurements collected in the summer of 2019 within natural forest stands near Batamay (63.52º N, 129.42º E) and Yert (62.02º N, 125.79º E) towns, in the boreal forests of the Republic of Sakha (Russia).</p> <ul> <li>YA2019_plots.xlsx: characteristics of the forest stands.</li> <li>YA2019_tree_transects.xlsx: field measurements collected for estimates of aboveground tree biomass.</li> <li>YA2019_fwd_transects.xlsx: field inventory of fine woody debris (FWD) using the line-intersect method.</li> <li>YA2019_fwd_specific_gravity.xlsx: raw data from the water displacement method required to derive size-class-specific values of specific gravity for FWD.</li> <li>YA2019_fwd_diameters.xlsx: field measurements of FWD diameters for determination of size-class-specific values of mean squared diameter (MSD).</li> </ul> <p>The description of variables is provided in each excel file as a separate sheet.</p>
Fig. 1 in Season of Fine Woody Debris Death Affects Colonization of Saproxylic Coleoptera
Fig. 1. General timeline: tree death (ax), inoculation time (∼∼∼), and emergence time (O---O) for A: Ferro et al.
Coarse woody debris density and carbon concentration by decay classes in mixed montane wet tropical forests (Dataset)
<p>This dataset contains data from a study considering the relationship between decay class, wood density and C content of CWD in old-growth mixed monsoon montane tropical forests in Vietnam based on the inventory of 359 CWD pieces.</p> <p>The CWD inventories were conducted on forty one (3-4 per site) 50 m long and 4 m wide transects. The first dataset for contains site description, plot and transect numbers with geographical coordinates. All CWD pieces of more than 6 cm in diameter were inventoried. The dataset contains position of CWD: stumps, standing dead trees (snags), lying logs, leaning logs and branches, diameter, proportion consumed by termites, decay class, bulk density and moisture of wood and mass loss. The second dataset contains the data on the wood density of tree species present in the study area according to the global database compiled by Zanne et al. (2009).</p>
Supplementary material 1 from: Shumskaya M, Lorusso N, Patel U, Leigh M, Somervuo P, Schigel D (2023) MycoPins: a metabarcoding-based method to monitor fungal colonization of fine woody debris. MycoKeys 96: 77-95. https://doi.org/10.3897/mycokeys.96.101033
Sequences of the primers used in the experiment and ITS2 fragment amplified from DNA extracted from saw dust of the pins
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Allen Brain Atlas
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Annotated Behaviour and Observability Dataset (ABODe)
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