Long-Term Nitrogen Deposition: Effects on Plant Diversity, Composition, Productivity and Stability. Year 1989 Raw data by plant species

• Format: Dataset
• Language: unknown
• Published: 1991
• 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; PANICUM PERLONGUM; POA PRATENSIS; ARISTIDA BASIRAMEA; LESPEDEZA CAPITATA; BERTEROA INCANA; POTENTILLA RECTA; PANICUM OLIGOSANTHES; AMBROSIA ARTEMISIIFOLIA ELATIOR; HEDEOMA HISPIDA; OENOTHERA BIENNIS; POLYGONUM CONVOLVULUS; SILENE ANTIRRHINA; SISYRINCHIUM CAMPESTRE; ASCLEPIAS SYRIACA; PHYSALIS VIRGINIANA; POLYGALA POLYGAMA; SCHIZACHYRIUM SCOPARIUM; MONARDA FISTULOSA; LYCHNIS ALBA; PHYSALIS HETEROPHYLLA; ACHILLEA MILLEFOLIUM(LANULOSA); CYPERUS SP; PANICUM PRAECOCIOUS; RUDBECKIA SEROTINA; SETARIA LUTESCENS (GLAUCA); ANEMONE CYLINDRICA; PENSTEMON GRACILIS; TRAGOPOGON DUBIUS (MAJOR); RUMEX ACETOSELLA; CHENOPODIUM ALBUM; CAREX SP; LIATRIS ASPERA; SOLIDAGO NEMORALIS; HIERACIUM LONGIPILUM; SOLIDAGO RIGIDA; ANDROPOGON GERARDI; ERAGROSTIS SPECTABILIS; CREPIS TECTORUM; LEPIDIUM DENSIFLORUM; POLYGONUM TENUE; ERIGERON CANADENSIS; MISCELLANEOUS HERBS; ROSA ARKANSANA; RUBUS SP; ARTEMISIA LUDOVICIANA; CAMPANULA ROTUNDIFOLIA; ASTER AZUREUS; LITHOSPERMUM CAROLINIENSE; OXYBAPHUS HIRSUTUS; EQUISETUM LAEVIGATUM; SORGHASTRUM NUTANS; AMBROSIA CORONOPIFOLIA; ASCLEPIAS TUBEROSA; VIOLA PEDATIFIDA; TRADESCANTIA OCCIDENTALIS; EUPHORBIA COROLLATA; ARTEMISIA (CAUDATA) CAMPESTRIS; STIPA SPARTEA; LATHYRUS VENOSUS; CORYLUS AMERICANUS; HELIANTHEMUM BICKNELLII; PENSTEMON GRANDIFLORUS; CHENOPODIUM LEPTOPHYLLUM; ERIGERON STRIGOSUS; QUERCUS BOREALIS; RHUS GLABRA; CALAMAGROSTIS CANADENSIS; QUERCUS MACROCARPA; STACHYS PALUSTRIS; SOLIDAGO GRAMINIFOLIA; SPOROBOLUS CRYPTANDRUS; COMANDRA RICHARDSIANA; HELIANTHUS SP; PRUNUS SP; POTENTILLA ARGUTA; LEERSIA ORYZOIDES; VERONICASTRUM VIRGINICUM; EUPHORBIA GLYPTOSPERMA; POTENTILLA SIMPLEX; SOLIDAGO SP; Saint-Paul; Recta; Cedar Creek; Campanula rotundifolia
• Online Access: http://hdl.handle.net/10255/dryad.22011; http://metacat.lternet.edu/knb/metacat/knb-lter-cdr.958901.2/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.