Long-Term Nitrogen Deposition: Effects on Plant Diversity, Composition, Productivity and Stability. Year 1982 Aboveground biomass data
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 larg...
Format: | Dataset |
---|---|
Language: | unknown |
Published: |
1984
|
Subjects: | |
Online Access: | http://hdl.handle.net/10255/dryad.30686 http://metacat.lternet.edu/knb/metacat/knb-lter-cdr.798201.2/xml |
id |
ftdryad:oai:v1.datadryad.org:10255/dryad.30686 |
---|---|
record_format |
openpolar |
institution |
Open Polar |
collection |
Dryad Digital Repository (Duke University) |
op_collection_id |
ftdryad |
language |
unknown |
topic |
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 |
spellingShingle |
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 Long-Term Nitrogen Deposition: Effects on Plant Diversity, Composition, Productivity and Stability. Year 1982 Aboveground biomass data |
topic_facet |
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 |
description |
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. |
format |
Dataset |
title |
Long-Term Nitrogen Deposition: Effects on Plant Diversity, Composition, Productivity and Stability. Year 1982 Aboveground biomass data |
title_short |
Long-Term Nitrogen Deposition: Effects on Plant Diversity, Composition, Productivity and Stability. Year 1982 Aboveground biomass data |
title_full |
Long-Term Nitrogen Deposition: Effects on Plant Diversity, Composition, Productivity and Stability. Year 1982 Aboveground biomass data |
title_fullStr |
Long-Term Nitrogen Deposition: Effects on Plant Diversity, Composition, Productivity and Stability. Year 1982 Aboveground biomass data |
title_full_unstemmed |
Long-Term Nitrogen Deposition: Effects on Plant Diversity, Composition, Productivity and Stability. Year 1982 Aboveground biomass data |
title_sort |
long-term nitrogen deposition: effects on plant diversity, composition, productivity and stability. year 1982 aboveground biomass data |
publishDate |
1984 |
url |
http://hdl.handle.net/10255/dryad.30686 http://metacat.lternet.edu/knb/metacat/knb-lter-cdr.798201.2/xml |
op_coverage |
The Cedar Creek Natural History Area is located in Anoka and Isanti counties, approximately 30 miles north of Saint Paul, MN. CCNHA lies at the boundary between prairie and forest. It is a mosaic of uplands dominated by oak savanna, prairie, hardwood forest, pine forests,and abandoned agricultural fields and of lowlands comprised of ash and cedar swamps, acid bogs, marshes, and sedge meadows. Large tracts of the pre-agricultural ecosystems of the region are preserved within its boundaries, as is a successional chronosequence of more than 80 old fields of known history. -93.22445 W -93.16289 E 45.44138 N 45.384865 S 1982 to 2006 1982 |
long_lat |
ENVELOPE(-129.954,-129.954,54.598,54.598) ENVELOPE(-60.515,-60.515,-62.932,-62.932) ENVELOPE(-57.715,-57.715,51.467,51.467) |
geographic |
Cedar Creek Recta Saint-Paul |
geographic_facet |
Cedar Creek Recta Saint-Paul |
genre |
Campanula rotundifolia |
genre_facet |
Campanula rotundifolia |
op_relation |
http://metacat.lternet.edu/knb/metacat/knb-lter-cdr.798201.2/xml knb-lter-cdr.798201.2 http://hdl.handle.net/10255/dryad.30686 |
op_rights |
Code of Ethics and Rules for Use of Cedar Creek LTER and Related DataAs a condition for access to data provided by researchers of the Cedar Creek LTER, I, the data user, agrees to abide by the following code of ethics.I agree to notify the Cedar Creek LTER scientists who gathered data if I would like to use those data in any publication. I acknowledge that these data were gathered by Cedar Creek scientists because they had already perceived the importance of these data for a variety of scientific and societal issues. I will provide them with formal recognition that, at their discretion, may include co-authorship or acknowledgements on publications. I realize that the researchers who gathered these data may be using them for scientific analyses, papers or publications that are currently planned or in preparation, and that such activities have precedence over any that I might wish to prepare. In this case, my preparation of any work may be delayed, at the option of the Cedar Creek researchers involved, until their work is completed. Because it may be possible to misinterpret a data set if it is taken out of context, I will seek the assistance and opinion of those Cedar Creek researchers involved in the design of a study and the collection of the data as I analyze the data. Moreover, I realize that this computer data set is not complete, and it may contain errors. The complete data set includes extensive written documentation, which should be referenced to reduce the chance of errors in data and errors of interpretation. |
_version_ |
1766383858259853312 |
spelling |
ftdryad:oai:v1.datadryad.org:10255/dryad.30686 2023-05-15T15:48:45+02:00 Long-Term Nitrogen Deposition: Effects on Plant Diversity, Composition, Productivity and Stability. Year 1982 Aboveground biomass data The Cedar Creek Natural History Area is located in Anoka and Isanti counties, approximately 30 miles north of Saint Paul, MN. CCNHA lies at the boundary between prairie and forest. It is a mosaic of uplands dominated by oak savanna, prairie, hardwood forest, pine forests,and abandoned agricultural fields and of lowlands comprised of ash and cedar swamps, acid bogs, marshes, and sedge meadows. Large tracts of the pre-agricultural ecosystems of the region are preserved within its boundaries, as is a successional chronosequence of more than 80 old fields of known history. -93.22445 W -93.16289 E 45.44138 N 45.384865 S 1982 to 2006 1982 1984 text/plain http://hdl.handle.net/10255/dryad.30686 http://metacat.lternet.edu/knb/metacat/knb-lter-cdr.798201.2/xml unknown http://metacat.lternet.edu/knb/metacat/knb-lter-cdr.798201.2/xml knb-lter-cdr.798201.2 http://hdl.handle.net/10255/dryad.30686 Code of Ethics and Rules for Use of Cedar Creek LTER and Related DataAs a condition for access to data provided by researchers of the Cedar Creek LTER, I, the data user, agrees to abide by the following code of ethics.I agree to notify the Cedar Creek LTER scientists who gathered data if I would like to use those data in any publication. I acknowledge that these data were gathered by Cedar Creek scientists because they had already perceived the importance of these data for a variety of scientific and societal issues. I will provide them with formal recognition that, at their discretion, may include co-authorship or acknowledgements on publications. I realize that the researchers who gathered these data may be using them for scientific analyses, papers or publications that are currently planned or in preparation, and that such activities have precedence over any that I might wish to prepare. In this case, my preparation of any work may be delayed, at the option of the Cedar Creek researchers involved, until their work is completed. Because it may be possible to misinterpret a data set if it is taken out of context, I will seek the assistance and opinion of those Cedar Creek researchers involved in the design of a study and the collection of the data as I analyze the data. Moreover, I realize that this computer data set is not complete, and it may contain errors. The complete data set includes extensive written documentation, which should be referenced to reduce the chance of errors in data and errors of interpretation. 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 dataset 1984 ftdryad 2020-01-01T14:51:47Z 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. Dataset Campanula rotundifolia Dryad Digital Repository (Duke University) Cedar Creek ENVELOPE(-129.954,-129.954,54.598,54.598) Recta ENVELOPE(-60.515,-60.515,-62.932,-62.932) Saint-Paul ENVELOPE(-57.715,-57.715,51.467,51.467) |