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Desert Fertilization Experiment: investigation of Sonoran desert ecosystem response to atmospheric deposition and experimental nutrient addition, ongoing since 2006

Publication date: 2020-10-02

Author(s):

  • Nancy Grimm, Arizona State University
  • Sharon Hall, Arizona State University
  • Jason Kaye, Penn State
  • Jonathan Allen, Allen Analytics LLC

Abstract:

Launched in 2006 with support from the National Science Foundation (NSF) and leveraged by the CAP LTER, the Carbon and Nitrogen deposition (CNdep) project sought to answer the fundamental question of whether elemental cycles in urban ecosystems are qualitatively different from those in non-urban ecosystems. Ecosystem scientists, atmospheric chemists, and biogeochemists tested the hypothesis that distinct biogeochemical pathways result from elevated inorganic nitrogen and organic carbon deposition from the atmosphere to the land. To test the hypothesis, scientists examined the responsiveness of Sonoran desert ecosystems to nutrient enrichment by capitalizing on a gradient of atmospheric deposition in and around the greater Phoenix metropolitan area. Fifteen desert study sites were established, with five locations each west and east of the urban core, and in the urban core in desert preserves. In addition to the gradient of atmospheric deposition in and around the urban core, select study plots at each of the fifteen desert locations receive amendments of nitrogen, phosphorus, or nitrogen + phosphorus fertilizer. Measured variables include soil properties, perennial and annual plant growth, and atmospheric deposition of nitrogen. At the close of the initial grant period, the CAP LTER assumed responsibility for the project, renamed the Desert Fertilization Experiment, which provides a remarkable platform to study the long-term effects of nutrient enrichment on desert ecosystem properties.

Keywords:


Temporal Coverage:

2005-12-07 to 2020-06-16

Geographic Coverage:

Geographic Description: desert and desert-remnant regional parks in the CAP LTER study encompassing the greater Phoenix metropolitan area and surrounding Sonoran desert region
Bounding Coordinates:
Longitude:-112.5474 to -111.4828
Latitude:33.7268 to 33.0133

Contact:

Information Manager, Central Arizona–Phoenix LTER, 
Arizona State University,Global Institute of Sustainability,Tempe
 caplter.data@asu.edu

Methods used in producing this dataset: Show


Data Files (10) :

Tabular: 632_annuals_biomass_bc886304cb737494c5f3f010199099a7.csv

Description: Biomass (g) of annual plants harvested from subplots within Desert Fertilization study plots. One-meter subplots include locations around a Larrea tridentata plant and locations in the interplant space between shrubs. Material is harvested from 0.25 square meter quadrats within each subplot. All harvests occur during the spring.
Temporal Coverage: 2008-03-07 to 2019-04-26

Column Description Type Units
site_code site name abbreviation
string
Enumeration:
  • DBG: core region: Desert Botanical Garden
  • EME: west region: Estrella Mountain Regional Park east
  • EMW: west region: Estrella Mountain Regional Park west
  • LDP: east region: Lost Dutchman State Park
  • MCN: east region: McDowell Mountain Regional north
  • MCS: east region: McDowell Mountain Regional south
  • MVP: core region: North Mountain
  • PWP: core region: Piestewa Peak
  • SME: core region: South Mountain Park east
  • SMW: core region: South Mountain Park west
  • SNE: west region: Sonoran Desert National Monument east
  • SNW: west region: Sonoran Desert National Monument west
  • SRR: east region: Salt River Recreation Area (Tonto NF)
  • UMP: east region: Usery Mountain Regional Park
  • WTM: west region: White Tanks Mountain Regional Park
plot_id plot id number
string
treatment_code treatment name abbreviation
string
Enumeration:
  • C1: control plot 1
  • N: nitrogen amendment
  • NP: nitrogen + phosphorus amendment
  • P: phosphorus amendment
location_within_plot habitat within plot where probes were deployed
string
Enumeration:
  • IP: subplot located in an interplant space
  • P: subplot features a Larrea tridentata plant
subplot subplot number (one of two replicates)
string
Enumeration:
  • 1: one of two replicates
  • 2: two of two replicates
subquad_orientation direction of subquadrat from which biomass was harvested
string
date date of data collection
date Format: YYYY-MM-DD
year year of data collection
date Format: YYYY
mass mass of biomass harvested in 0.25 meterSquare quadrat
float gram
notes field and_or processing notes
string

Tabular: 632_annuals_composition_aa7662bbb61836a9c8ad2eb4fe1cbf68.csv

Description: Composition of annual plants and some other characteristics (e.g., bare soil, base or canopy of perennial plants) at subplots within Desert Fertilization study plots. One-meter subplots include locations around a Larrea tridentata plant and locations in the interplant space between shrubs. All measurements collected in the spring.

Column Description Type Units
site_code site name abbreviation
string
Enumeration:
  • DBG: core region: Desert Botanical Garden
  • EME: west region: Estrella Mountain Regional Park east
  • EMW: west region: Estrella Mountain Regional Park west
  • LDP: east region: Lost Dutchman State Park
  • MCN: east region: McDowell Mountain Regional north
  • MCS: east region: McDowell Mountain Regional south
  • MVP: core region: North Mountain
  • PWP: core region: Piestewa Peak
  • SME: core region: South Mountain Park east
  • SMW: core region: South Mountain Park west
  • SNE: west region: Sonoran Desert National Monument east
  • SNW: west region: Sonoran Desert National Monument west
  • SRR: east region: Salt River Recreation Area (Tonto NF)
  • UMP: east region: Usery Mountain Regional Park
  • WTM: west region: White Tanks Mountain Regional Park
plot_id plot id number
string
treatment_code treatment name abbreviation
string
Enumeration:
  • C1: control plot 1
  • N: nitrogen amendment
  • NP: nitrogen + phosphorus amendment
  • P: phosphorus amendment
location_within_plot habitat within plot where probes were deployed
string
Enumeration:
  • IP: subplot located in an interplant space
  • P: subplot features a Larrea tridentata plant
subplot subplot number (one of two replicates)
string
Enumeration:
  • 1: one of two replicates
  • 2: two of two replicates
date date of data collection
date Format: YYYY-MM-DD
year year of data collection
date Format: YYYY
collector initials of subplot surveyors
string
cover_type taxon of annual plant, plot characteristic, or logistical note
string
Enumeration:
  • Ambrosia_base: base of the trunk of a plant of this type where it enters the ground
  • Ambrosia_cover: cover of the over story of a plant of this type within the plot or overhanging the subplot
  • Ambrosia_stem: characterizing dead or broken branches of a plant of this type that have fallen into the plot
  • Amsinckia: Amsinckia
  • Amsinckia_menziesii: Amsinckia menziesii
  • Amsinckia_tessellata: Amsinckia tessellata
  • Aristida_adscensionis: Aristida adscensionis
  • Asteraceae: Asteraceae
  • Astragalus: Astragalus
  • Astragalus_nuttallianus: Astragalus nuttallianus
  • Baileya_multiradiata: Baileya multiradiata
  • bare_ground: bare ground
  • Boraginaceae: Boraginaceae
  • Bowlesia_incana: Bowlesia incana
  • Brassicaceae: Brassicaceae
  • Bromus_rubens: Bromus rubens
  • Calandrinia_ciliata: Calandrinia ciliata
  • Camissonia_californica: Camissonia californica
  • Camissonia_claviformis: Camissonia claviformis
  • Castilleja_exserta: Castilleja exserta
  • Caulanthus_lasiophyllus: Caulanthus lasiophyllus
  • Chaenactis_stevioides: Chaenactis stevioides
  • Chamaesyce: Chamaesyce
  • Chamaesyce_albomarginata: Chamaesyce albomarginata
  • Chamaesyce_polycarpa: Chamaesyce polycarpa
  • Chorizanthe: Chorizanthe
  • Chorizanthe_brevicornu: Chorizanthe brevicornu
  • Chorizanthe_rigida: Chorizanthe rigida
  • Cistanthe_monandra: Cistanthe monandra
  • Crassula_connata: Crassula connata
  • Cryptantha: Cryptantha
  • Cryptantha_angustifolia: Cryptantha angustifolia
  • Cryptantha_barbigera: Cryptantha barbigera
  • Cryptantha_decipiens: Cryptantha decipiens
  • Cryptantha_maritima: Cryptantha maritima
  • Cryptantha_pterocarya: Cryptantha pterocarya
  • Cylindropuntia_acanthocarpa_base: base of the trunk of a plant of this type where it enters the ground
  • Cylindropuntia_acanthocarpa_cover: cover of the over story of a plant of this type within the plot or overhanging the subplot
  • Cylindropuntia_bigelovii_base: base of the trunk of a plant of this type where it enters the ground
  • Cylindropuntia_bigelovii_cover: cover of the over story of a plant of this type within the plot or overhanging the subplot
  • Cylindropuntia_fulgida_base: base of the trunk of a plant of this type where it enters the ground
  • Cylindropuntia_fulgida_cover: cover of the over story of a plant of this type within the plot or overhanging the subplot
  • Daucus_pusillus: Daucus pusillus
  • Descurainia_pinnata: Descurainia pinnata
  • Dichelostemma_capitatum: Dichelostemma capitatum
  • Ditaxis_lanceolata: Ditaxis lanceolata
  • Ditaxis_neomexicana: Ditaxis neomexicana
  • Draba_cuneifolia: Draba cuneifolia
  • Encelia_farinosa_base: base of the trunk of a plant of this type where it enters the ground
  • Encelia_farinosa_cover: cover of the over story of a plant of this type within the plot or overhanging the subplot
  • Eremothera_chamaenerioides: Eremothera chamaenerioides
  • Eriastrum_diffusum: Eriastrum diffusum
  • Eriastrum_eremicum: Eriastrum eremicum
  • Eriochloa_aristata: Eriochloa aristata
  • Eriogonum_thomasii: Eriogonum thomasii
  • Eriophyllum_lanosum: Eriophyllum lanosum
  • Erodium_cicutarium: Erodium cicutarium
  • Erodium_texanum: Erodium texanum
  • Eschscholzia_californica: Eschscholzia californica
  • Eucrypta: Eucrypta
  • Eucrypta_chrysanthemifolia: Eucrypta chrysanthemifolia
  • Gilia_stellata: Gilia stellata
  • green: green
  • Herniaria_hirsuta: Herniaria hirsuta
  • Hordeum_murinum: Hordeum murinum
  • Krameria_grayi_base: base of the trunk of a plant of this type where it enters the ground
  • Krameria_grayi_cover: cover of the over story of a plant of this type within the plot or overhanging the subplot
  • Lactuca_serriola: Lactuca serriola
  • Larrea_base: base of the trunk of a plant of this type where it enters the ground
  • Larrea_cover: cover of the over story of a plant of this type within the plot or overhanging the subplot
  • Lasthenia_californica: Lasthenia californica
  • Lepidium_lasiocarpum: Lepidium lasiocarpum
  • Lesquerella_gordonii: Lesquerella gordonii
  • Linanthus: Linanthus
  • Linanthus_bigelovii: Linanthus bigelovii
  • Linanthus_demissus: Linanthus demissus
  • litter: litter
  • Loeflingia_squarrosa: Loeflingia squarrosa
  • Logfia_arizonica: Logfia arizonica
  • Logfia_depressa: Logfia depressa
  • Logfia_filaginoides: Logfia filaginoides
  • Lotus_humistratus: Lotus humistratus
  • Lotus_salsuginosus: Lotus salsuginosus
  • Lotus_strigosus: Lotus strigosus
  • Lupinus_concinnus: Lupinus concinnus
  • Lupinus_sparsiflorus: Lupinus sparsiflorus
  • Lycium_base: base of the trunk of a plant of this type where it enters the ground
  • Lycium_cover: cover of the over story of a plant of this type within the plot or overhanging the subplot
  • Mammillaria_grahamii_base: base of the trunk of a plant of this type where it enters the ground
  • Mammillaria_grahamii_cover: cover of the over story of a plant of this type within the plot or overhanging the subplot
  • Minuartia_douglasii: Minuartia douglasii
  • Nemacladus_glanduliferus: Nemacladus glanduliferus
  • Nemacladus_rigidus: Nemacladus rigidus
  • Oligomeris_linifolia: Oligomeris linifolia
  • Oncosiphon_piluliferum: Oncosiphon piluliferum
  • Orobanche_cooperi: Orobanche cooperi
  • Orthocarpus_purpurascens: Orthocarpus purpurascens
  • Parietaria_hespera: Parietaria hespera
  • Parkinsonia_microphylla_base: base of the trunk of a plant of this type where it enters the ground
  • Parkinsonia_microphylla_cover: cover of the over story of a plant of this type within the plot or overhanging the subplot
  • Pectocarya: Pectocarya
  • Pectocarya_heterocarpa: Pectocarya heterocarpa
  • Pectocarya_platycarpa: Pectocarya platycarpa
  • Pectocarya_recurvata: Pectocarya recurvata
  • Perityle_emoryi: Perityle emoryi
  • Phacelia_crenulata: Phacelia crenulata
  • Phacelia_distans: Phacelia distans
  • Pholistoma_auritum: Pholistoma auritum
  • Plagiobothrys_arizonicus: Plagiobothrys arizonicus
  • Plantago: Plantago
  • Plantago_ovata: Plantago ovata
  • Plantago_patagonica: Plantago patagonica
  • Poa_bigelovii: Poa bigelovii
  • Polemoniaceae: Polemoniaceae
  • Pseudognaphalium: Pseudognaphalium
  • Rafinesquia_neomexicana: Rafinesquia neomexicana
  • Salsola_tragus: Salsola tragus
  • Salvia_columbariae: Salvia columbariae
  • sampled: indicating that the plot was surveyed
  • Schismus_arabicus: Schismus arabicus
  • Silene_antirrhina: Silene antirrhina
  • Simmondsia_chinensis_cover: cover of the over story of a plant of this type within the plot or overhanging the subplot
  • Sisymbrium_irio: Sisymbrium irio
  • soil_crusts: soil crusts
  • Sonchus_oleraceus: Sonchus oleraceus
  • Sphaeralcea_coulteri: Sphaeralcea coulteri
  • Stylocline_gnaphaloides: Stylocline gnaphaloides
  • Stylocline_micropoides: Stylocline micropoides
  • total_shrub_cover: cover of the over story of a plant of this type within the plot or overhanging the subplot
  • unidentified: unidentified
  • unidentified_1_2017: unidentified_1_2017
  • unidentified_1_2018: unidentified_1_2018
  • unidentified_2_2017: unidentified_2_2017
  • unidentified_2_2018: unidentified_2_2018
  • unidentified_3_2017: unidentified_3_2017
  • unidentified_3_2018: unidentified_3_2018
  • Uropappus_lindleyi: Uropappus lindleyi
  • Vulpia_microstachys: Vulpia microstachys
  • Vulpia_octoflora: Vulpia octoflora
cover_category nature of the observation (taxonomic, general plot characteristic, logistical)
string
Enumeration:
  • annual: observation referring to a type of plant
  • plot characteristic: observation referring to characteristic of the plot other than cover of a specific type of annual plant
  • record_keeping: entry for record keeping, typically whether the plot was survyed
cover_amount proportion of subplot as a decimal fraction of this type
float dimensionless

Tabular: 632_atmospheric_deposition_1f006ee7b0cbb0980804e906b9550d72.csv

Description: ammonium-nitrogen and nitrate-nitrogen as measured by ion exchange resin (IER) collectors that are used to measure bulk (wet) deposition in interplant open spaces and throughfall (wet and dry) deposition under the dominant shrub
Temporal Coverage: 2008-09-08 to 2020-03-23

Column Description Type Units
run_id unique identifer of Lachat run provided primarily to allow users to associate blanks with samples
string
field_id sample identifer
string
Enumeration:
  • DBG.IP CNTL1: Desert Botanical Garden inter-plant control repliate number 1
  • DBG.IP CNTL2: Desert Botanical Garden inter-plant control repliate number 2
  • DBG.IP CNTL3: Desert Botanical Garden inter-plant control repliate number 3
  • DBG.IP1: Desert Botanical Garden inter-plant replicate number 1
  • DBG.IP1.6MONTH: Desert Botanical Garden inter-plant collected at a 6-month interval replicate number 1
  • DBG.IP2: Desert Botanical Garden inter-plant replicate number 2
  • DBG.IP2.6MONTH: Desert Botanical Garden inter-plant collected at a 6-month interval replicate number 2
  • DBG.LATR CNTL1: Desert Botanical Garden under Larrea tridendata control replicate number 1
  • DBG.LATR CNTL2: Desert Botanical Garden under Larrea tridendata control replicate number 2
  • DBG.LATR CNTL3: Desert Botanical Garden under Larrea tridendata control replicate number 3
  • DBG.LATR1: Desert Botanical Garden under Larrea tridendata replicate number 1
  • DBG.LATR2: Desert Botanical Garden under Larrea tridendata replicate number 2
  • EME.IP1: Estrella Mountain Park east inter-plant replicate number 1
  • EME.IP2: Estrella Mountain Park east inter-plant replicate number 2
  • EME.LATR1: Estrella Mountain Park east under Larrea tridendata replicate number 1
  • EME.LATR2: Estrella Mountain Park east under Larrea tridendata replicate number 2
  • EMW.IP1: Estrella Mountain Park east inter-plant replicate number 1
  • EMW.IP2: Estrella Mountain Park east inter-plant replicate number 2
  • EMW.LATR1: Estrella Mountain Park east under Larrea tridendata replicate number 1
  • EMW.LATR2: Estrella Mountain Park east under Larrea tridendata replicate number 2
  • GTW IP1 (Gateway/Thompson): McDowell Sonoran Preserve Gateway Thompson Peak inter-plant replicate number 1
  • GTW IP2 (Gateway/Thompson): McDowell Sonoran Preserve Gateway Thompson Peak inter-plant replicate number 2
  • KCl_blank: solution blanks of the 0.2 M KCl extract solution that is run through a filter; this solution is used to construct the standard curves
  • LDP.IP CNTL1: Lost Dutchman State Park inter-plant control replicate number 1
  • LDP.IP CNTL2: Lost Dutchman State Park inter-plant control replicate number 2
  • LDP.IP CNTL3: Lost Dutchman State Park inter-plant control replicate number 3
  • LDP.IP1: Lost Dutchman State Park inter-plant replicate number 1
  • LDP.IP2: Lost Dutchman State Park inter-plant replicate number 2
  • LDP.LATR CNTL1: Lost Dutchman State Park under Larrea tridendata control replicate number 1
  • LDP.LATR CNTL2: Lost Dutchman State Park under Larrea tridendata control replicate number 2
  • LDP.LATR CNTL3: Lost Dutchman State Park under Larrea tridendata control replicate number 3
  • LDP.LATR1: Lost Dutchman State Park under Larrea tridendata replicate number 1
  • LDP.LATR2: Lost Dutchman State Park under Larrea tridendata replicate number 2
  • LVE IP3 104th&Bell Levytrail: McDowell Sonoran Preserve Bell Road inter-plant replicate number 3
  • LVE IP4 104th&Bell Levytrail: McDowell Sonoran Preserve Bell Road inter-plant replicate number 4
  • MCN.IP1: McDowell Mountain Park north inter-plant replicate number 1
  • MCN.IP2: McDowell Mountain Park north inter-plant replicate number 2
  • MCN.LATR1: McDowell Mountain Park north under Larrea tridendata replicate number 1
  • MCN.LATR2: McDowell Mountain Park north under Larrea tridendata replicate number 2
  • MCS.IP1: McDowell Mountain Park south inter-plant replicate number 1
  • MCS.IP1.6MONTH: McDowell Mountain Park south inter-plant collected at a 6-month interval replicate number 1
  • MCS.IP2: McDowell Mountain Park south inter-plant replicate number 2
  • MCS.IP2.6MONTH: McDowell Mountain Park south inter-plant collected at a 6-month interval replicate number 2
  • MCS.LATR1: McDowell Mountain Park south under Larrea tridendata replicate number 1
  • MCS.LATR2: McDowell Mountain Park south under Larrea tridendata replicate number 2
  • PWP.IP1: Piestewa Peak inter-plant replicate number 1
  • PWP.IP2: Piestewa Peak inter-plant replicate number 2
  • PWP.LATR1: Piestewa Peak under Larrea tridendata replicate number 1
  • PWP.LATR2: Piestewa Peak under Larrea tridendata replicate number 2
  • resin.KCl.1: run blank constructed by performing the complete extraction procedure on an aliquot of clean resin material that was not deployed in the field or otherwise used in any way replicate 1
  • resin.KCl.2: run blank constructed by performing the complete extraction procedure on an aliquot of clean resin material that was not deployed in the field or otherwise used in any way replicate 1
  • resin.KCl.3: run blank constructed by performing the complete extraction procedure on an aliquot of clean resin material that was not deployed in the field or otherwise used in any way replicate 1
  • SME.IP1: South Mountain east inter-plant replicate number 1
  • SME.IP2: South Mountain east inter-plant replicate number 2
  • SME.LATR1: South Mountain east under Larrea tridendata replicate number 1
  • SME.LATR2: South Mountain east under Larrea tridendata replicate number 2
  • SMW.IP CNTL1: South Mountain west inter-plant control replicate number 1
  • SMW.IP CNTL2: South Mountain west inter-plant control replicate number 2
  • SMW.IP CNTL3: South Mountain west inter-plant control replicate number 3
  • SMW.IP1: South Mountain west inter-plant replicate number 1
  • SMW.IP2: South Mountain west inter-plant replicate number 2
  • SMW.LATR CNTL1: South Mountain west under Larrea tridendata control replicate number 1
  • SMW.LATR CNTL2: South Mountain west under Larrea tridendata control replicate number 2
  • SMW.LATR CNTL3: South Mountain west under Larrea tridendata control replicate number 3
  • SMW.LATR1: South Mountain west under Larrea tridendata replicate number 1
  • SMW.LATR2: South Mountain west under Larrea tridendata replicate number 2
  • SNE.IP1: Sonoran Monument east inter-plant replicate number 1
  • SNE.IP2: Sonoran Monument east inter-plant replicate number 2
  • SNE.LATR1: Sonoran Monument east under Larrea tridendata replicate number 1
  • SNE.LATR2: Sonoran Monument east under Larrea tridendata replicate number 2
  • SNW.IP1: Sonoran Monument west inter-plant replicate number 1
  • SNW.IP2: Sonoran Monument west inter-plant replicate number 2
  • SNW.LATR1: Sonoran Monument west under Larrea tridendata replicate number 1
  • SNW.LATR2: Sonoran Monument west under Larrea tridendata replicate number 2
  • SRR.IP1: Salt River Recreation area inter-plant replicate number 1
  • SRR.IP2: Salt River Recreation area inter-plant replicate number 2
  • SRR.LATR1: Salt River Recreation area under Larrea tridendata replicate number 1
  • SRR.LATR2: Salt River Recreation area under Larrea tridendata replicate number 2
  • UMP.IP1: Usury Mountain Park inter-plant replicate number 1
  • UMP.IP2: Usury Mountain Park inter-plant replicate number 2
  • UMP.LATR1: Usury Mountain Park under Larrea tridendata replicate number 1
  • UMP.LATR2: Usury Mountain Park under Larrea tridendata replicate number 2
  • WTM.IP CNTL1: White Tank Mountain Park inter-plant control replicate number 1
  • WTM.IP CNTL2: White Tank Mountain Park inter-plant control replicate number 2
  • WTM.IP CNTL3: White Tank Mountain Park inter-plant control replicate number 3
  • WTM.IP1: White Tank Mountain Park inter-plant replicate number 1
  • WTM.IP1.6MONTH: White Tank Mountain Park inter-plant collected at a 6-month interval replicate number 1
  • WTM.IP2: White Tank Mountain Park inter-plant replicate number 2
  • WTM.IP2.6MONTH: White Tank Mountain Park inter-plant collected at a 6-month interval replicate number 2
  • WTM.LATR CNTL1: White Tank Mountain Park under Larrea tridendata control replicate number 1
  • WTM.LATR CNTL2: White Tank Mountain Park under Larrea tridendata control replicate number 2
  • WTM.LATR CNTL3: White Tank Mountain Park under Larrea tridendata control replicate number 3
  • WTM.LATR1: White Tank Mountain Park under Larrea tridendata replicate number 1
  • WTM.LATR2: White Tank Mountain Park under Larrea tridendata replicate number 2
collection_date date collectors are extracted from their deployment in the field
date Format: YYYY-MM-DD
notes technician notes regarding conditions in the field or sample processing
string
analyte_name nitrogen species measured (ammonium-nitrogen or nitrate-nitrogen)
string
Enumeration:
  • Ammonia: ammonium-nitrogen
  • NItrate/Nitrite: nitrate-nitrogen
concentration concentration of nitrogen species measured as ammonium-nitrogen or nitrate-nitrogen
float milligramPerLiter

Tabular: 632_fertilizer_application_d48c5ff4379202ccebd6fd958b67551b.csv

Description: catalog of amounts and timing of nitrogen and phosphorus fertilizer applications to nitrogen (N), phosphorus (P), and nitrogen+phosphorus (N+P) treatment plots
Temporal Coverage: 2008-06-26 to 2020-03-27

Column Description Type Units
site_code site name abbreviation
string
Enumeration:
  • DBG: core region: Desert Botanical Garden
  • EME: west region: Estrella Mountain Regional Park east
  • EMW: west region: Estrella Mountain Regional Park west
  • LDP: east region: Lost Dutchman State Park
  • MCN: east region: McDowell Mountain Regional north
  • MCS: east region: McDowell Mountain Regional south
  • MVP: core region: North Mountain
  • PWP: core region: Piestewa Peak
  • SME: core region: South Mountain Park east
  • SMW: core region: South Mountain Park west
  • SNE: west region: Sonoran Desert National Monument east
  • SNW: west region: Sonoran Desert National Monument west
  • SRR: east region: Salt River Recreation Area (Tonto NF)
  • UMP: east region: Usery Mountain Regional Park
  • WTM: west region: White Tanks Mountain Regional Park
application_date date of fertilizer application
date Format: YYYY-MM-DD
nitrogen amount of ammonium-nitrate nitrogen fertilizer applied to 20mx20m nitrogen (N) and nitrogen+phosphorus (N+P) treatment plots
float kilogram
phosphorus amount of triple-super phosphate phosphorus fertilizer applied to 20mx20m phosphorus (P) and nitrogen+phosphorus (N+P) treatment plots
float kilogram

Tabular: 632_plant_root_simulator_e01096fe5099f484c7932a3a5b30359f.csv

Description: Soil ion concentrations as determined with Plant Root Simulator (PRS®) probes (ion exchange resin membranes). Probes for the analyses of soil anions have a positively-charged membrane to simultaneously attract and adsorb all negatively-charged anions, such as nitrate (NO3-), phosphate (H2PO4-, HPO42-), and sulphate (SO42-), whereas cation probes have a negatively-charged membrane to simultaneously attract and adsorb all positively-charged cations, such as ammonium (NH4+), potassium (K+), calcium (Ca2+), and magnesium (Mg2+).
Temporal Coverage: 2008-06-18 to 2019-12-06

Column Description Type Units
site_code site name abbreviation
string
Enumeration:
  • BLK: refers to a blank for chemistry data
  • DBG: core region: Desert Botanical Garden
  • EME: west region: Estrella Mountain Regional Park east
  • EMW: west region: Estrella Mountain Regional Park west
  • LDP: east region: Lost Dutchman State Park
  • MCN: east region: McDowell Mountain Regional north
  • MCS: east region: McDowell Mountain Regional south
  • MVP: core region: North Mountain
  • PWP: core region: Piestewa Peak
  • SME: core region: South Mountain Park east
  • SMW: core region: South Mountain Park west
  • SNE: west region: Sonoran Desert National Monument east
  • SNW: west region: Sonoran Desert National Monument west
  • SRR: east region: Salt River Recreation Area (Tonto NF)
  • UMP: east region: Usery Mountain Regional Park
  • WTM: west region: White Tanks Mountain Regional Park
plot_id plot id number
string
treatment_code treatment name abbreviation
string
Enumeration:
  • C1: control plot 1
  • C2: control plot 2
  • N: nitrogen amendment
  • NP: nitrogen + phosphorus amendment
  • P: phosphorus amendment
start_date date of probe deployment
date Format: YYYY-MM-DD
end_date date of probe extraction
date Format: YYYY-MM-DD
analyte analyte measured
string
Enumeration:
  • Al: aluminum
  • B: boron
  • Ca: calcium
  • Cd: cadmium
  • Cu: copper
  • Fe: iron
  • K: potassium
  • Mg: magnesium
  • Mn: manganese
  • NH4-N: ammonium-nitrogen
  • NO3-N: nitrate-nitrogen
  • P: phosphorus amendment
  • Pb: lead
  • S: sulfur
  • Total-N: sum of NO3-N and NH4-N
  • Zn: zinc
final_value analyte concentration
float microgramPerTenSquareCentimeterPerBurialLength
flag data quality flag
string
location_within_plot habitat within plot where probes were deployed
string
Enumeration:
  • between_plant: probes buried between plant canopies
  • blank: field blank: probe stored in a clean container under refrigeration during the deployment period
  • blk_washed: field blank (washed): probe stored in a clean container under refrigeration during the deployment period, and washed as per sample probes
  • under_plant: probes buried beneath the canopy of Larrea tridentata
num_cation_probes number of probes designated for analysis of cations recovered (of four)
float number
num_anion_probes number of probes designated for analysis of anions recovered (of four)
float number

Tabular: 632_stem_growth_e4b756fc85d5feba5680b51c1bcf2d74.csv

Description: Biannual measures of stem growth on five Larrea tridentata study plants in Desert Fertilization experiment treatment and control plots
Temporal Coverage: 2005-12-07 to 2020-06-16

Column Description Type Units
site_code site name abbreviation
string
Enumeration:
  • DBG: core region: Desert Botanical Garden
  • EME: west region: Estrella Mountain Regional Park east
  • EMW: west region: Estrella Mountain Regional Park west
  • LDP: east region: Lost Dutchman State Park
  • MCN: east region: McDowell Mountain Regional north
  • MCS: east region: McDowell Mountain Regional south
  • MVP: core region: North Mountain
  • PWP: core region: Piestewa Peak
  • SME: core region: South Mountain Park east
  • SMW: core region: South Mountain Park west
  • SNE: west region: Sonoran Desert National Monument east
  • SNW: west region: Sonoran Desert National Monument west
  • SRR: east region: Salt River Recreation Area (Tonto NF)
  • UMP: east region: Usery Mountain Regional Park
  • WTM: west region: White Tanks Mountain Regional Park
plot_id plot id number
string
treatment_code treatment name abbreviation
string
Enumeration:
  • C1: control plot 1
  • N: nitrogen amendment
  • NP: nitrogen + phosphorus amendment
  • P: phosphorus amendment
scientific_name scientific name of plant measured
string
shrub_code study plant identifier
string
Enumeration:
  • L1: Larrea tridentata study plant #1
  • L2: Larrea tridentata study plant #2
  • L3: Larrea tridentata study plant #3
  • L4: Larrea tridentata study plant #4
  • L5: Larrea tridentata study plant #5
direction direction or quadrant of plant in which measured stem is positioned
string
Enumeration:
  • East: stem in east quadrant of plant
  • North: stem in north quadrant of plant
  • South: stem in south quadrant of plant
  • West: stem in west quadrant of plant
pre_date date of initial or pre stem-length measurement
date Format: YYYY-MM-DD
post_date date of final or post stem-length
date Format: YYYY-MM-DD
post_note field note regarding final or post stem-length measurement
string
post_measurement boolean indicator denoting whether the measurement is a pre or initial stem-length measurement (FALSE), or a final or post stem-length measurement (TRUE)
string
Enumeration:
  • FALSE: initial: pre stem-length measurement
  • TRUE: final: post stem-length measurement
stem_length length of stem
float millimeter
stem_comment field note(s) regarding particular shrub or measurement
string
plot_comment field note(s) regarding particular the plot or site
string

Tabular: 632_tissue_chn_afe0b7ab22a125129ed243a3845ae7b2.csv

Description: CHN (Carbon, Hydrogen, and Nitrogen) elemental analysis of Larrea tridentata leaf tissue and Pectocarya recurvata (whole plant) tissue collected from control plots at Desert Fertilization study sites.
Temporal Coverage: 2015-05-26 to 2018-05-18

Column Description Type Units
site_code site name abbreviation
string
Enumeration:
  • DBG: core region: Desert Botanical Garden
  • EME: west region: Estrella Mountain Regional Park east
  • EMW: west region: Estrella Mountain Regional Park west
  • LDP: east region: Lost Dutchman State Park
  • MCN: east region: McDowell Mountain Regional north
  • MCS: east region: McDowell Mountain Regional south
  • MVP: core region: North Mountain
  • PWP: core region: Piestewa Peak
  • SME: core region: South Mountain Park east
  • SMW: core region: South Mountain Park west
  • SNE: west region: Sonoran Desert National Monument east
  • SNW: west region: Sonoran Desert National Monument west
  • SRR: east region: Salt River Recreation Area (Tonto NF)
  • UMP: east region: Usery Mountain Regional Park
  • WTM: west region: White Tanks Mountain Regional Park
plot_id plot identifier
string
treatment_code treatment name abbreviation
string
Enumeration:
  • C1: control plot 1
  • N: nitrogen amendment
  • NP: nitrogen + phosphorus amendment
  • P: phosphorus amendment
sample_date date of leaf (Larrea) or plant (Pectocarya) collection
date Format: YYYY-MM-DD
season_year season and year of collection (for easier sorting)
string
tissue_type source of tissue material
string
Enumeration:
  • Larrea tridentata: Larrea tridentata leaf tissue
  • Pectocarya recurvata: Pectocarya recurvata whole-plant tissue
analyte element analyzed
string
Enumeration:
  • Carbon %: percent carbon
  • Hydrogen %: percent hydrogen
  • Nitrogen %: percent nitrogen
Weight weight of material used for analysis
float gram
percent_composition percent composition of analyte
float dimensionless
Comment comment about analytical measurement
string

Tabular: 632_tissue_icp_9deb3c6f2a60ae7ebf82b947ff094476.csv

Description: Elemental composition of Larrea tridentata leaf tissue and Pectocarya recurvata (whole plant) tissue collected from control plots at Desert Fertilization study sites. Most analyses are by ICP-MS except Sulfur (S), which is typically analyzed by ICP-OES with the instrument type noted in the instrument field.
Temporal Coverage: 2009-05-04 to 2016-10-12

Column Description Type Units
site_code site name abbreviation
string
Enumeration:
  • DBG: core region: Desert Botanical Garden
  • EME: west region: Estrella Mountain Regional Park east
  • EMW: west region: Estrella Mountain Regional Park west
  • LDP: east region: Lost Dutchman State Park
  • MCN: east region: McDowell Mountain Regional north
  • MCS: east region: McDowell Mountain Regional south
  • MVP: core region: North Mountain
  • PWP: core region: Piestewa Peak
  • SME: core region: South Mountain Park east
  • SMW: core region: South Mountain Park west
  • SNE: west region: Sonoran Desert National Monument east
  • SNW: west region: Sonoran Desert National Monument west
  • SRR: east region: Salt River Recreation Area (Tonto NF)
  • UMP: east region: Usery Mountain Regional Park
  • WTM: west region: White Tanks Mountain Regional Park
plot_id plot identifier
string
treatment_code treatment name abbreviation
string
Enumeration:
  • C1: control plot 1
sample_date date of leaf (Larrea) or plant (Pectocarya) collection
date Format: YYYY-MM-DD
season_year season and year of collection (for easier sorting)
string
tissue_type source of tissue material
string
Enumeration:
  • Larrea tridentata: Larrea tridentata leaf tissue
  • Pectocarya spp.: Pectocarya spp. whole-plant tissue
instrument instrument employed for tissue analysis
string
Enumeration:
  • ICP-MS: Inductively Coupled Plasma Mass Spectrometer
  • ICP-OES: Inductively Coupled Plasma Optical Emission Spectrometer
isotope_element isotope atomic mass and element symbol, except Sulfur (S; element symbol only)
string
concentration mass of isotope_element per mass of leaf material
float milligramPerKilogram
source_file file name corresponding to raw data for the observation (raw data available as another entity in this data set)
string

Spatial Vector: 632_desert_fertilization_sampling_sites.kml

Description: approximate location of desert fertilization long-term study sites
Horizontal Coordinate System:GCS_WGS_1984
Geometry Type: Polygon

Column Description Type Units
Name site name abbreviation
string
description study site location description
string

File: 632_raw_icp_cd7dc5022886f5d4365871bdf1647724.zip

Description: This zipped file contains the raw ICP-MS and ICP-OES data (as XSLM and xls files) pertaining to the analyses of Larrea tridentata leaf tissue and Pectocarya recurvata plant tissue samples. The calculated concentrations are presented in an analysis-friendly format in the data entity 'tissue_icp' that is part of this dataset; the raw data file from which the calculated concentrations were derived is referenced in the source_file field of the tissue_icp data entity.


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