Long-Term Nitrogen Deposition: Effects on Plant Diversity, Composition, Productivity and Stability. Year 1982 Aboveground biomass data

• Format: Dataset
• Language: unknown
• Published: 1984
• 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; MISCELLANEOUS LITTER; AGROPYRON REPENS; AGROSTIS SCABRA; PANICUM PERLONGUM; ARISTIDA BASIRAMEA; DIGITARIA ISCHAEMUM; CYPERUS SP; ACHILLEA MILLEFOLIUM(LANULOSA); AMBROSIA CORONOPIFOLIA; BERTEROA INCANA; ERIGERON CANADENSIS; ERIGERON STRIGOSUS; FRAGARIA VIRGINIANA; POTENTILLA RECTA; PANICUM OLIGOSANTHES; POLYGONUM CONVOLVULUS; SETARIA LUTESCENS (GLAUCA); AMBROSIA ARTEMISIIFOLIA ELATIOR; ASCLEPIAS OVALIFOLIA; POA PRATENSIS; HEDEOMA HISPIDA; OENOTHERA BIENNIS; LYCHNIS ALBA; SISYRINCHIUM CAMPESTRE; HIERACIUM LONGIPILUM; ANEMONE CYLINDRICA; HELIANTHEMUM BICKNELLII; TRADESCANTIA OCCIDENTALIS; CHENOPODIUM ALBUM; EUPHORBIA (SUPINA) MACULATA; VERBASCUM THAPSUS; MOSSES & LICHENS; TRAGOPOGON DUBIUS (MAJOR); CREPIS TECTORUM; POLYGONUM TENUE; SCHIZACHYRIUM SCOPARIUM; CAREX SP; CHRYSOPSIS VILLOSA; RUDBECKIA SEROTINA; RUMEX ACETOSELLA; SPOROBOLUS CRYPTANDRUS; LEPIDIUM DENSIFLORUM; LESPEDEZA CAPITATA; SORGHASTRUM NUTANS; ARABIS HIRSUTA; GNAPHALIUM OBTUSIFOLIUM; MONARDA FISTULOSA; ACER NEGUNDO; EUPHORBIA GLYPTOSPERMA; CENCHRUS LONGISPINUS; ERAGROSTIS SPECTABILIS; SETARIA VIRIDIS; PENSTEMON GRACILIS; MISCELLANEOUS HERBS; PANICUM PRAECOCIOUS; EUPHORBIA COROLLATA; MELILOTUS ALBA; SOLIDAGO NEMORALIS; SILENE ANTIRRHINA; EQUISETUM LAEVIGATUM; ASCLEPIAS TUBEROSA; LIATRIS ASPERA; TRIFOLIUM REPENS; ANDROPOGON GERARDI; LITHOSPERMUM CAROLINIENSE; LECHEA STRICTA; SOLIDAGO RIGIDA; LITHOSPERMUM CANESCENS; PHYSALIS VIRGINIANA; ASCLEPIAS VERTICILLATA; ROSA ARKANSANA; ARTEMISIA LUDOVICIANA; ASTER ERICOIDES; PENSTEMON GRANDIFLORUS; VIOLA SP; VIOLA PEDATIFIDA; CAMPANULA ROTUNDIFOLIA; QUERCUS ELLIPSOIDALIS; RUBUS SP; ARTEMISIA (CAUDATA) CAMPESTRIS; ASTER AZUREUS; CHENOPODIUM LEPTOPHYLLUM; OXYBAPHUS HIRSUTUS; STIPA SPARTEA; POLYGONUM SP; POLYGALA POLYGAMA; ASTER SP; CORYLUS AMERICANUS; RHUS GLABRA; SOLIDAGO GRAMINIFOLIA; MISCELLANEOUS SP; QUERCUS MACROCARPA; LATHYRUS VENOSUS; COMANDRA RICHARDSIANA; QUERCUS BOREALIS; CALAMOVILFA LONGIFOLIA; ANTENNARIA NEGLECTA; COREOPSIS PALMATA; MOLLUGO VERTICILLATA; RANUNCULUS RHOMBOIDEUS; HELIANTHUS HIRSUTUS; PANICUM CAPILLARE; ASCLEPIAS SYRIACA; SALIX SP; FRAGARIA VESCA (AMERICANA); MISCELLANEOUS GRASSES; EUPATORIUM MACULATUM; LOBELIA SPICATA; SCLERIA TRIGLOMERATA; CORNUS STOLONIFERA; VIOLA SAGITTATA; SOLIDAGO SP; POTENTILLA SIMPLEX; CALAMAGROSTIS CANADENSIS; SOLIDAGO GIGANTEA; VERBENA BRACTEATA; PHLOX PILOSA; Cedar Creek; Recta; Saint-Paul; Campanula rotundifolia
• Online Access: http://hdl.handle.net/10255/dryad.30686; http://metacat.lternet.edu/knb/metacat/knb-lter-cdr.798201.2/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.