Data Set Summary
|Dataset Title:||SGS-LTER Earthwatch - Organic Matter in Abandoned Fields in eastern Colorado, USA 1994-1995|
|Abstract:||Our research on abandoned fields at the CPER has two aspects,vegetation recovery and soil recovery. We wish to monitor these fields for the tem of the LTER project (decades or centuries), and to address some specific research questions. Our questions are:
1. Does vegetation on shortgrass steppe recover 55 years following cultivation? Specifically, does Bouteloua gracilis, the dominant shortgrass steppe species, recover?
Prior results indicated that B. gracilis reovers on some fields, and does not on others. The fields that do not are dominated by buffalo grass. In this new work at the CPER, we ask an additional question:
2. What determines whether B. gracilis recovers?
3. Does soil organic matter recover following abandonment? Specifically, do indices of soil fertility such as nitrogen availability recover?
4. Does small-scale patterning associated with individual plants recover following disturbance?
5. Does the rate of soil recovery depend upon the rate of vegetation recovery?
Past results on the Pawnee National Grasslands indicated that only small amounts of organic matter had accumulated following abandonment but that nitrogen availability had recovered to its original levels under B. gracilis plants on the abandoned fields. Specifically, we are interested in whether it makes a difference to soils if blue grama recovers or not.
|Methods:||We sampled numerous abandoned fields and adjacent native fields for their soil organic matter status. We sampled soils to a 5cm depth and in 3 microsites, in bare areas, under Bouteloua gracilis, and under Buchloe doctyloides. We analyzed samples for pools of total and available nutrients, microbial C and N, mineralizable C and N, and particulate organic matter.|
|Principal Investigator:||Indy Burke|
|Long Term Contact:||Indy Burke: email@example.com|
|Public Access Status:||open|
|Long Term Experiment?:||Yes|
|Keywords:||inorganic nutrients, organic matter, soil organic matter, organic carbon, organic nitrogen, nitrogen, carbon, nitrogen mineralization, soils, soil water|
|Geographic Location:||Bounded by (40.929148N,-104.792385W) and
Altitude Range: 1460.10 to 1750.90 Meters above sea level
SGS-LTER Earthwatch - In situ Nitrogen Mineralization on Native, Abandoned and Cultivated Fields in eastern Colorado, USA in 1991
SGS-LTER Earthwatch Project - Nitrogen and Carbon in Native, Abandoned and Cultivated Fields in eastern Colorado, USA 1991
Burke, I.C., W.K. Lauenroth, and D.P. Coffin. 1995. Soil organic matter recovery in semiarid grasslands: implications for the conservation reserve program. Ecological Applications. 5: 793801
Download Data Set
Note: Standard Excel files are limited to around 64,000 rows. Several of our data sets are much larger than that – if your download takes a long time to initialize, check the excel file for the last row. If the last row is at or in excess of 64,000, please contact us to arrange for alternative access to the larger tables.