Data Set Citation:
When using this data, please cite the data package:
Wolkovich E.
Non-native grass litter manipulation, San Diego, CA USA 2005-2007
wolkovich.3.16 (https://knb.ecoinformatics.org:443/knb/metacat/wolkovich.3.16/knb)
General Information:
Title:Non-native grass litter manipulation, San Diego, CA USA 2005-2007
Identifier:wolkovich.3.16
Abstract:
This research used field manipulation of non-native litter to characterize both the impacts and the mechanisms of invasive grass litter in coastal sage scrub (CSS) habitat. CSS is a semi-arid habitat of southern California where the invasion of non-native annual grasses can transform shrub and soil crust dominated habitats into grasslands with low shrub cover, with associated dramatic changes in the system’s detritus. The study was a fully crossed, two-factor litter manipulation begun at the end of the growing seasons in 2005 and 2006 and effects followed through 2007. Fifty-six, 3m x 3m manipulation plots (separated by 10–50 m) were estbalished around typically sized (1m^3) A. californica shrubs in areas either already highly invaded by grass (>40% non-native grass cover, assessed visually) or not (<5%; factor 1, invasion level: premanipulation high or low invasion). We then added, removed or left unchanged grass litter (factor 2, treatment: addition, removal, or control) in a fully crossed design, with each of the six treatment levels (invasion level x treatment) replicated eight times. We also controlled for removal effects with a removal-control treatment. Two plots were lost to a fire after the start of the experiment. A suite of soil, vegetation and arthropod community properties were followed for 1 year before the manipulation and 2 years thereafter. The following publications came from these data: Wolkovich E.M. (2010). Nonnative grass litter enhances grazing arthropod assemblages by increasing native shrub growth. Ecology, 91, 756-766. (Data includes: Arthropods from pitfall trapping 2005-2007, Vacuum Arthropods, Soil & Shrubs, Shrub chemistry 2007, Veg 2005-2007) Wolkovich E.M., Bolger D.T. & Cottingham K.L. (2009). Invasive grass litter facilitates native shrubs through abiotic effects. Journal of Vegetation Science, 20, 1121-1132. (Data includes: Soil and Shrubs 2005-2007, Veg 2005-2007, Nitrogen mineralization: 2005, 2007) Wolkovich E.M., Bolger D.T. & Holway D.A. (2009). Complex responses to invasive grass litter by ground arthropods in a Mediterranean scrub ecosystem. Oecologia, 161, 697-708. (Data includes: Arthropods from pitfall trapping 2005-2007, Veg 2005-2007) Wolkovich E.M., Lipson D.A., Virginia R.A., Cottingham K.L. & Bolger D.T. (2010). Grass invasion causes rapid increases in ecosystem carbon and nitrogen storage in a semiarid shrubland. Global Change Biology, 16, 1351-1365. (Data includes: Soil and Shrubs 2005-2007, Veg 2005-2007, Nitrogen mineralization: 2005, 2007, Litterbags) Note: To use any data the treatment codes file is needed.
Keywords:
  • detritus
  • non-native plant invasion
  • exotic grass litter
  • semi-arid
  • coastal sage scrub
  • Mediterranean climate
  • food webs
  • ecosystem C and N storage
Data Table, Image, and Other Data Details:
Metadata download: Ecological Metadata Language (EML) File
Data Table:GrassMan_Wolkovich_Pitfalls.csv ( View Metadata | Download File download)
Data Table:Arthropod taxa codes ( View Metadata | Download File download)
Data Table:Vac (Shruboreal) Arthropod Taxa Codes ( View Metadata | Download File download)
Data Table:Arthropods from vacuum sampling 2006-2007 ( View Metadata | Download File download)
Data Table:Treatment codes ( View Metadata | Download File download)
Data Table:GrassManSoilShrubs.csv ( View Metadata | Download File download)
Data Table:tissue2007.csv ( View Metadata | Download File download)
Data Table:GrassMan_litterbags.csv ( View Metadata | Download File download)
Data Table:GrassMan_veg.csv ( View Metadata | Download File download)
Data Table:Lizzie_Sp_Code_List.txt ( View Metadata | Download File download)
Data Table:GrassMan_nmin.csv ( View Metadata | Download File download)

Involved Parties

Data Set Creators:
Individual:Dr. Elizabeth Wolkovich
Organization:National Center for Ecological Analysis & Synthesis
Position:Postdoctoral fellow
Address:
735 State Street, Suite 300,
Santa Barbara, CA 93101 USA
Phone:
805-892-2523 (voice)
Email Address:
wolkovich@nceas.ucsb.edu
Data Set Contacts:
Individual:Dr. Elizabeth Wolkovich
Organization:National Center for Ecological Analysis & Synthesis
Position:Postdoctoral fellow
Address:
735 State Street, Suite 300,
Santa Barbara, CA 93101 USA
Phone:
805-892-2523 (voice)
Email Address:
wolkovich@nceas.ucsb.edu

Data Set Characteristics

Geographic Region:
Geographic Description:San Diego National Wildlife Refuge - Sweetwater Unit (California, USA)
Bounding Coordinates:
West:  -116.57  degrees
East:  -116.57  degrees
North:  32.43  degrees
South:  32.43  degrees
Time Period:
Begin:
2005-03-15
End:
2007-06-15
Taxonomic Range:
Classification:
Rank Name:Class
Rank Value:Collembola
Common Name:springtails
Classification:
Rank Name:Family
Rank Value:Formicidae
Classification:
Rank Name:Order
Rank Value:Aranae
Classification:
Rank Name:Order
Rank Value:Formicidae
Common Name:mites

Sampling, Processing and Quality Control Methods

Data Set Usage Rights

No restrictions on usage -- though I would be happy to be informed of any projects using the data.
Access Control:
Auth System:knb
Order:allowFirst
Allow: [read] public
Metadata download: Ecological Metadata Language (EML) File