Decomposition

Decomposition dataset or project

Aggregate mesquite litter mass following soil-litter mixing and decomposition in a semi-arid grassland from 2010-2012

Study number: 

301

Data set ID: 

210301002

Date range: 

2010-04-01 to 2012-10-31

Original investigator: 

Dan Hewins

Data contact: 

Abstract: 

Mesquite litter mass loss from decomposition associated with soil-litter mixing.

 

Mesquite litter mass loss from decomposition associated with soil-litter mixing.

 

Decomposition models typically under-predict decomposition relative to observed rates in drylands. This discrepancy indicates a significant gap in our mechanistic understanding of carbon and nutrient cycling in these systems. Recent research suggests that certain drivers of decomposition that are often not explicitly incorporated into models (e.g., photodegradation and soil-litter mixing; SLM) may be important in drylands, and their exclusion may, in part, be responsible for model under-predictions. To assess the role of SLM, litterbags were deployed in the Chihuahuan Desert and interrelationships between vegetation structure, SLM, and rates of decomposition were quantified. Vegetation structure was manipulated to simulate losses of grass cover from livestock grazing and shrub encroachment. I hypothesized that reductions in grass cover would promote SLM and accelerate mass loss by improving conditions for microbial decomposition.  

 

For more see: Hewins, D. B., S. R. Archer, G. S. Okin, R. L. McCulley, and H. L. Throop. 2013. Soil-litter mixing accelerates decomposition in a Chihuahuan Desert grassland. Ecosystems 16:183-195

Data download: 

Aggregate mesquite litter chemistry following soil-litter mixing and decomposition in a semi-arid grassland from 2010-2012

Study number: 

301

Data set ID: 

210301001

Date range: 

2010-04-01 to 2012-10-31

Original investigator: 

Dan Hewins

Data contact: 

Abstract: 

The effect of vegetation structure on soil-litter mixing (SLM) and decomposition was explicitly tested in a litterbag experiment on a Chihuahuan Desert grassland site where vegetation cover was manipulated to simulate the progressive loss of grass cover accompanying livestock grazing and woody plant encroachment.  We hypothesized that (i) reductions in grass cover would destabilize soi

The effect of vegetation structure on soil-litter mixing (SLM) and decomposition was explicitly tested in a litterbag experiment on a Chihuahuan Desert grassland site where vegetation cover was manipulated to simulate the progressive loss of grass cover accompanying livestock grazing and woody plant encroachment.  We hypothesized that (i) reductions in grass cover would destabilize soils and promote SLM, and (ii) that SLM would enhance microbial abundance and alter microbial community composition in ways that accelerate decomposition. To test our hypotheses, we quantified mass loss, and chemistry of litter incubated on sites with experimental reductions in grass cover (0 to 100% removals) over a 12-month period.  This dataset is of the percent carbon, percent nitrogen, and the carbon to nitrogen ratio.

Data download: 

Project ID: 

210301000

Original Investigator: 

Dan Hewins

Abstract: 

To understand relationships between soil-litter mixing, climate and biological decomposition in the context of soil microbial films and aggregate formation in a semi-arid grassland from 2010-2012

 

Funding Source: 

LTER V

Research Area: 

Data Category: 

Project ID: 

210010000

Original Investigator: 

Walter G Whitford

Abstract: 

Data for Jornada LTERII termite bait weight loss. Toilet paper roll termite baits are placed on grids on each consumer plot.

Data include initial bait weights and bait weights after baits have been retrieved from the field once each year. Weight loss is calculated as a measure of termite foraging activity.

Funding Source: 

LTER-II, LTER-III

Research Area: 

Data Category: 

Termite bait data

Study number: 

10

Data set ID: 

2100010001

Date range: 

1989-03-15 to 2000-01-14

Original investigator: 

Walter G Whitford

Data contact: 

Abstract: 

Data for Jornada LTERII termite bait weight loss. Toilet paper roll termite baits are placed on grids on each consumer plot. Data include initial bait weights and bait weights after baits have been retrieved from the field once each year. Weight loss is calculated as a measure of termite foraging activity.

Data for Jornada LTERII termite bait weight loss. Toilet paper roll termite baits are placed on grids on each consumer plot. Data include initial bait weights and bait weights after baits have been retrieved from the field once each year. Weight loss is calculated as a measure of termite foraging activity.

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