Long-Term Nitrogen Deposition: Effects on Plant Diversity, Composition, Productivity and Stability. Year 1992 Raw data by plant species

• Format: Dataset
• Language: unknown
• Published: 1994
• Subjects: Cedar Creek Natural History Area; Long Term; Ecology; Successional dynamics; Primary Productivity; Disturbance Patterns; Nutrient Budgets; Nutrient Cycles; Climatic Variation; Biodiversity; Ecosystem functioning; Nitrogen limitation; Fire Frequency; Plant Competition; MOSSES & LICHENS; MISCELLANEOUS LITTER; AGROPYRON REPENS; SCHIZACHYRIUM SCOPARIUM; PANICUM PERLONGUM; POA PRATENSIS; LESPEDEZA CAPITATA; ANEMONE CYLINDRICA; ERIGERON CANADENSIS; ERIGERON STRIGOSUS; BERTEROA INCANA; PHYSALIS HETEROPHYLLA; ARISTIDA BASIRAMEA; ACHILLEA MILLEFOLIUM(LANULOSA); HEDEOMA HISPIDA; LEPIDIUM DENSIFLORUM; POLYGONUM CONVOLVULUS; SILENE ANTIRRHINA; ARABIS GLABRA; PANICUM OLIGOSANTHES; MONARDA FISTULOSA; AMBROSIA ARTEMISIIFOLIA ELATIOR; TRAGOPOGON DUBIUS (MAJOR); CREPIS TECTORUM; ARABIS SP; RUDBECKIA SEROTINA; MISCELLANEOUS HERBS; SETARIA LUTESCENS (GLAUCA); FUNGI; VERBASCUM THAPSUS; POTENTILLA RECTA; ERAGROSTIS SPECTABILIS; PENSTEMON GRACILIS; CHENOPODIUM ALBUM; LYCHNIS ALBA; HIERACIUM LONGIPILUM; ASCLEPIAS SYRIACA; PHYSALIS VIRGINIANA; CYPERUS SP; RUMEX ACETOSELLA; AGROSTIS SCABRA; CAREX SP; ANTENNARIA NEGLECTA; LECHEA STRICTA; EQUISETUM LAEVIGATUM; SOLIDAGO RIGIDA; PANICUM PRAECOCIOUS; GNAPHALIUM OBTUSIFOLIUM; OENOTHERA BIENNIS; POLYGONUM TENUE; LIATRIS ASPERA; SOLIDAGO NEMORALIS; LACTUCA CANADENSIS; ROSA ARKANSANA; RUBUS SP; AMBROSIA CORONOPIFOLIA; ARTEMISIA (CAUDATA) CAMPESTRIS; ARTEMISIA LUDOVICIANA; LITHOSPERMUM CAROLINIENSE; POLYGALA POLYGAMA; SISYRINCHIUM CAMPESTRE; TRADESCANTIA OCCIDENTALIS; VIOLA PEDATIFIDA; SORGHASTRUM NUTANS; OXYBAPHUS HIRSUTUS; EUPHORBIA COROLLATA; ASTER AZUREUS; ASCLEPIAS TUBEROSA; CAMPANULA ROTUNDIFOLIA; LITHOSPERMUM CANESCENS; LATHYRUS VENOSUS; HELIANTHEMUM BICKNELLII; STIPA SPARTEA; CHENOPODIUM LEPTOPHYLLUM; LACTUCA SP; POLYGONATUM CANALICULATUM; VICIA VILLOSA; QUERCUS BOREALIS-ELLIPSOIDALIS; SOLIDAGO GRAMINIFOLIA; VIOLA SAGITTATA; RANUNCULUS RHOMBOIDEUS; ANDROPOGON GERARDI; CALAMAGROSTIS CANADENSIS; STACHYS PALUSTRIS; HELIANTHUS LAETIFLORUS; QUERCUS MACROCARPA; RHUS GLABRA; SPOROBOLUS CRYPTANDRUS; COREOPSIS PALMATA; COMANDRA RICHARDSIANA; MISCELLANEOUS GRASSES; ASTER ERICOIDES; LEERSIA ORYZOIDES; PRUNUS SP; HELIANTHUS GIGANTEUS; VERONICASTRUM VIRGINICUM; POTENTILLA ARGUTA; ASTER SIMPLEX; Giganteus; Saint-Paul; Recta; Cedar Creek; Campanula rotundifolia
• Online Access: http://hdl.handle.net/10255/dryad.24693; http://metacat.lternet.edu/knb/metacat/knb-lter-cdr.959201.2/xml

The purpose of this experiment is to measure how adding nitrogen over a long time will affect the number of species, the type of species present, the amount of annual growth, and the change from year to year in the growth of each species in a plant community which is also relieved of grazing by large and small mammals. The experiment is being conducted within fields (A, B, C, and D) which were initially low in soil nutrients. There are 8 different levels of nitrogen addition with other nutrients added to ensure that nitrogen remains the limiting nutrient, and a control which receives no nutrients. There are 6 replicates of the 9 treatments in fields A, B, and C and 5 replicates in field D. The treatments were randomly assigned to the plots. In fields A, B, and C the plots are in 6 by 9 grid and are 4 by 4 meters in size with 1 meter aisles between plots. In field D the plots are 1.5 by 4 meters and are placed in a 3 by 17 grid. The plots are enclosed by a fence to keep out mammalian herbivores. Gophers are trapped and removed as they appear. Nitrogen fertilizer (NH4NO3) is applied twice per year, once in early May and once in late June. This experiment was begun in 1982 by David Tilman.