Long-Term Nitrogen Deposition: Effects on Plant Diversity, Composition, Productivity and Stability. Year 1984 Aboveground biomass data

• Format: Dataset
• Language: unknown
• Published: 1986
• 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; AGROSTIS SCABRA; ARISTIDA BASIRAMEA; MISCELLANEOUS GRASSES; CYPERUS SP; ACHILLEA MILLEFOLIUM(LANULOSA); AMBROSIA ARTEMISIIFOLIA ELATIOR; BERTEROA INCANA; ERIGERON CANADENSIS; ERIGERON STRIGOSUS; HEDEOMA HISPIDA; LEPIDIUM DENSIFLORUM; POLYGONUM CONVOLVULUS; POTENTILLA RECTA; SILENE ANTIRRHINA; FRAGARIA VIRGINIANA; VERBASCUM THAPSUS; PANICUM OLIGOSANTHES; CREPIS TECTORUM; RUDBECKIA SEROTINA; TRAGOPOGON DUBIUS (MAJOR); ARABIS HIRSUTA; SCHIZACHYRIUM SCOPARIUM; POA PRATENSIS; EUPHORBIA GLYPTOSPERMA; OENOTHERA BIENNIS; LYCHNIS ALBA; ANEMONE CYLINDRICA; PANICUM PRAECOCIOUS; RUMEX ACETOSELLA; ARABIS GLABRA; LECHEA STRICTA; LESPEDEZA CAPITATA; HIERACIUM LONGIPILUM; POLYGONUM TENUE; ERIGERON ANUUS; MISCELLANEOUS HERBS; ARTEMISIA (CAUDATA) CAMPESTRIS; SOLIDAGO SPECIOSA; ERAGROSTIS SPECTABILIS; TRIFOLIUM REPENS; PENSTEMON GRACILIS; AMBROSIA CORONOPIFOLIA; MOLLUGO VERTICILLATA; MELILOTUS SP; FUNGI; MELILOTUS ALBA; ANDROPOGON GERARDI; PHYSALIS HETEROPHYLLA; LIATRIS ASPERA; SOLIDAGO NEMORALIS; SOLIDAGO RIGIDA; HIERACIUM SP; GNAPHALIUM OBTUSIFOLIUM; OENOTHERA SP; TYPHA GLAUCA; PHYSALIS VIRGINIANA; CYPERUS SCHWEINITZII; LITHOSPERMUM CAROLINIENSE; EQUISETUM LAEVIGATUM; POLYGALA POLYGAMA; ROSA ARKANSANA; SETARIA LUTESCENS (GLAUCA); CAREX SP; HELIANTHEMUM BICKNELLII; LITHOSPERMUM CANESCENS; ARTEMISIA LUDOVICIANA; ASTER AZUREUS; PENSTEMON GRANDIFLORUS; SORGHASTRUM NUTANS; ASCLEPIAS TUBEROSA; VIOLA PEDATIFIDA; OXYBAPHUS HIRSUTUS; PANICUM PERLONGUM; CAMPANULA ROTUNDIFOLIA; EUPHORBIA COROLLATA; SISYRINCHIUM CAMPESTRE; VIOLA SP; PETALOSTEMUM PURPUREUM; STIPA SPARTEA; TRADESCANTIA OCCIDENTALIS; CHENOPODIUM ALBUM; VICIA VILLOSA; LATHYRUS VENOSUS; RHUS GLABRA; RUBUS SP; HELIANTHUS LAETIFLORUS; SOLIDAGO GRAMINIFOLIA; RANUNCULUS RHOMBOIDEUS; CORYLUS AMERICANUS; QUERCUS MACROCARPA; MISCELLANEOUS SP; ANTENNARIA NEGLECTA; MUHLENBERGIA RACEMOSA; VIOLA PEDATA; COREOPSIS PALMATA; COMANDRA RICHARDSIANA; PRUNUS PUMILA; ASCLEPIAS SYRIACA; CALAMOVILFA LONGIFOLIA; ARISTIDA SP; ASCLEPIAS SP; POTENTILLA SIMPLEX; HELIANTHUS GIGANTEUS; ASPARAGUS OFFICINALIS; SCLERIA TRIGLOMERATA; PHLOX PILOSA; VIOLA SAGITTATA; LOBELIA SPICATA; SENECIO SP; ASTER SIMPLEX; VERONICASTRUM VIRGINICUM; STACHYS PALUSTRIS; CALAMAGROSTIS CANADENSIS; CALAMOVILFA SP; Cedar Creek; Giganteus; Recta; Saint-Paul; Campanula rotundifolia
• Online Access: http://hdl.handle.net/10255/dryad.29263; http://metacat.lternet.edu/knb/metacat/knb-lter-cdr.798401.2/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.