University of Minnesota
University of Minnesota
College of Biological Sciences
http://www.cbs.umn.edu/

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Nutrient Network. A cross-site investigation of bottom-up control over herbaceous plant community dynamics and ecosystem function. - Experiment 247


Light Availability

Years Available: 2008 - 2014

Principle Investigators

Borer, Elizabeth
Harpole, Stan
Seabloom, Eric

View All Experiment and Dataset Methods

ATTRIBUTES

FieldNameDefinitionUnitCode
1yearyear of measurement
2site_nameExpanded Nutrient Network site name
3site_codeNutrient Network site code
4year_trtplot treatment progression status 0=pretreatment observation, 1=first observations after treatments, 2=2nd year after treatment, 3=3rd year after treatment, 4=4th year after treatment, 5=5th year after treatment, 6=6th year after treatment, 7=7th year after treatment
5trtapplied treatment combinationControl=no treatment, K=potassium, P=phosphate, N=nitrogen, PK=phosphate potassium, NK=nitrogen potassium, NP=nitrogen phosphate, NPK=nitrogen phosphate potassium, Fence=Fence, NPK Fence=nitrogen phosphate potassium fence
6blockblock numbernumber
7plotplot numbernumber
8NNitrogen treatment1=Nitrogen applied as timed-release urea [NH2)2CO2], 0=no N applied
9PPhosphate treatment 1=10 gramsPerMeterSquaredPerYear as triple-super phosphate [Ca(H2PO4)2], 0=no P applied
10KPotassium AND initial micronutrient treatment1=10 gramsPerMeterSquaredPerYear as potassium sulfate [K2SO4] AND one-time application in treatment year 1 of 100 gramsPerMeterSquared of a micronutrient mix of Fe (15%) S (14%) Mg (1??5%) Mn (2??5%) Cu (1%) Zn (1%) B (0??2%) and Mo (0??05%), 0=no K or micronutrients applied
11ExcloseFence enclosure treatment1=plot surrounded by 230-cm-tall fence with the lower 90 cm surrounded by 1-cm woven wire mesh (hardware cloth) with a 30-cm outward-facing flange stapled to the ground and an upper fence composed of four strands of tensioned wire strung at equal vertical intervals, 0=no fence
12Nitrogen added to plotAmount of nitrogen from fertilizer added to the plotgramsPerMeterSquaredPerYear
13Ambient_PARMEAN ceptometer reading at 2m height (above grassland canopy) during approximately solar noon (11:00 - 14:00 local time) on a clear daydimensionless
14Ground_PARMEAN ceptometer reading at 0m height (ground level) during approximately solar noon (11:00 - 14:00 local time) on a clear daydimensionless
15proportion_parGround_PAR / Ambient_PARdimensionless
 

SAMPLE DATASET

yearsite_namesite_codeyear_trttrtblockplotNPKExcloseNitrogen added to plotAmbient_PARGround_PARproportion_par
2008Cedar Creek LTERcdcr.us1NPK+Fence111111101792156.50.087332589
2008Cedar Creek LTERcdcr.us1NP1211001018414430.240630092
2008Cedar Creek LTERcdcr.us1NPK1311101016802780.16547619
2008Cedar Creek LTERcdcr.us1K140010018219980.548050522
2008Cedar Creek LTERcdcr.us1PK16011001845143.50.077777778
2008Cedar Creek LTERcdcr.us1N171000101757910.50.518212863
2008Cedar Creek LTERcdcr.us1P18010001833706.50.385433715
2008Cedar Creek LTERcdcr.us1Fence110000102025709.50.35037037
2008Cedar Creek LTERcdcr.us1Control111000001903744.50.391224383
2008Cedar Creek LTERcdcr.us1NK11210101018581010.054359526
2008Cedar Creek LTERcdcr.us1Control2130000018568750.471443966
2008Cedar Creek LTERcdcr.us1NK2141010101785127.50.071428571
               

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Nutrient Network. A cross-site investigation of bottom-up control over herbaceous plant community dynamics and ecosystem function.: Light Availability

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