Desert Fertilization Experiment: composition of annual plants in study plots within desert preserves in and around the greater Phoenix metropolitan area, spring 2008
Publication date: 20180531
Bounding Coordinates:
Longitude:112.547375174279 to 111.482761068522
Latitude:33.7267711478719 to 33.013262396669
PO Box 875402,Tempe
caplter.data@asu.edu
Author(s):
 Jonathan Allen, Allen Analytics LLC
 Nancy Grimm, Arizona State University
 Sharon Hall, Arizona State University
 Jason Kaye, Penn State
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 nonurban 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 longterm
effects of nutrient enrichment on ecosystem properties.
This data set features the composition of annual plants in subplots at
project study sites assessed in spring 2008. These data are published
independently of surveys of annual plants in subsequent years owing to
slightly differnet methods employed in 2008 relative to other years.
Investigators interested in annual plants composition data from other
years, or for other Desert Fertilization Experiment data, should search
the data repository for 'desert fertilization experiment'.
Keywords:
plants, vegetation, nitrogen deposition, atmospheric deposition, community composition, plant cover, plant species composition, fertilizer, fertilization population studies, parks and rivers cap lter, cap, caplter, central arizona phoenix long term ecological research, arizona, az, arid land, desert preserve, desert fertilization experiment
Temporal Coverage:
20080301 to 20080331Geographic Coverage:
Geographic Description: desert and desertremnant regional parks in the CAP LTER study areaBounding Coordinates:
Longitude:112.547375174279 to 111.482761068522
Latitude:33.7267711478719 to 33.013262396669
Contact:
Data Manager, Julie Ann Wrigley Global Institute of Sustainability, Arizona State University,PO Box 875402,Tempe
caplter.data@asu.edu
Methods used in producing this dataset: Show
Data Files (2) :
Tabular: 655_annuals_composition_2008_6b74c53283820aa68b6b9b2a2421f275.csv
Description: Composition of annual plants and other study plot
characteristics (e.g., base or canopy of perennial plants) at subplots
within Desert Fertilization study plots assessed in the spring of 2008.
Onemeter subplots include locations around a Larrea tridentata plant
and locations in the interplant space between shrubs. Composition of
plants reflects the relative cover of each plant as a decimal
fraction.
Column  Description  Type  Units 

site_code  site name abbreviation 
Enumeration:


plot_id  plot id number 

treatment_code  treatment name abbreviation 
Enumeration:


location_within_plot  habitat within plot where probes were deployed 
Enumeration:


subplot  subplot number (one of two replicates) 
number  
year  year of plot assessment 
number  
collector  initials of technicians 

Ambrosia base  base of the trunk of Ambrosia plants where it enters the ground 
dimensionless  
Larrea base  base of the trunk of Larrea tridentata plants where it enters the ground 
dimensionless  
Ambrosia stem  dead or broken Ambrosia branches that have fallen into the plot (sometimes they can take up a significant amount of plot cover) 
dimensionless  
Total Plant Cover in Plot  fraction of the study plot characterized by annual cover 
dimensionless  
Pectocarya spp  relative cover as decimal fraction of Pectocarya spp 
dimensionless  
Schismus arabicus  relative cover as decimal fraction of Schismus arabicus 
dimensionless  
Amsinckia menziesii  relative cover as decimal fraction of Amsinckia menziesii 
dimensionless  
Lotus salsuginosus  relative cover as decimal fraction of Lotus salsuginosus 
dimensionless  
Lotus strigosus  relative cover as decimal fraction of Lotus strigosus 
dimensionless  
Bowlesia incana  relative cover as decimal fraction of Bowlesia incana 
dimensionless  
Crassula connata  relative cover as decimal fraction of Crassula connata 
dimensionless  
Cryptantha decipiens  relative cover as decimal fraction of Cryptantha decipiens 
dimensionless  
Daucus pusillus  relative cover as decimal fraction of Daucus pusillus 
dimensionless  
Erodium cicutarium  relative cover as decimal fraction of Erodium cicutarium 
dimensionless  
Erodium texanum  relative cover as decimal fraction of Erodium texanum 
dimensionless  
Eschscholzia californica  relative cover as decimal fraction of Eschscholzia californica 
dimensionless  
Lepidium lasiocarpum  relative cover as decimal fraction of Lepidium lasiocarpum 
dimensionless  
Lesquerella gordonii  relative cover as decimal fraction of Lesquerella gordonii 
dimensionless  
Lupinus concinnus  relative cover as decimal fraction of Lupinus concinnus 
dimensionless  
Lupinus sparsiflorus  relative cover as decimal fraction of Lupinus sparsiflorus 
dimensionless  
Orthocarpus purpurascens  relative cover as decimal fraction of Orthocarpus purpurascens 
dimensionless  
Parietaria hespera  relative cover as decimal fraction of Parietaria hespera 
dimensionless  
Phacelia distans  relative cover as decimal fraction of Phacelia distans 
dimensionless  
Plagiobothrys arizonicus  relative cover as decimal fraction of Plagiobothrys arizonicus 
dimensionless  
Plantago ovata  relative cover as decimal fraction of Plantago ovata 
dimensionless  
Plantago patagonica  relative cover as decimal fraction of Plantago patagonica 
dimensionless  
Sisymbrium irio  relative cover as decimal fraction of Sisymbrium irio 
dimensionless  
Vulpia octoflora  relative cover as decimal fraction of Vulpia octoflora 
dimensionless  
Chaenactis stevioides  relative cover as decimal fraction of Chaenactis stevioides 
dimensionless  
Rafinesquia neomexicana  relative cover as decimal fraction of Rafinesquia neomexicana 
dimensionless  
Eriastrum diffusum  relative cover as decimal fraction of Eriastrum diffusum 
dimensionless  
Lotus humistratus  relative cover as decimal fraction of Lotus humistratus 
dimensionless  
Silene antirrhina  relative cover as decimal fraction of Silene antirrhina 
dimensionless  
Houstonia nama  relative cover as decimal fraction of Houstonia nama 
dimensionless  
Eriophyllum lanosum  relative cover as decimal fraction of Eriophyllum lanosum 
dimensionless  
Draba cuneifolia  relative cover as decimal fraction of Draba cuneifolia 
dimensionless  
Eucrypta chrysamthemifolia  relative cover as decimal fraction of Eucrypta chrysamthemifolia 
dimensionless  
Chorizanthe rigida_brevicornu  relative cover as decimal fraction of Chorizanthe rigida_brevicornu 
dimensionless  
Linanthus demissus  relative cover as decimal fraction of Linanthus demissus 
dimensionless  
Linanthus bigelovii  relative cover as decimal fraction of Linanthus bigelovii 
dimensionless  
Callandrinia sp.  relative cover as decimal fraction of Callandrinia sp. 
dimensionless  
Eschscholzia arizonica  relative cover as decimal fraction of Eschscholzia arizonica 
dimensionless  
Marina sp.  relative cover as decimal fraction of Marina sp. 
dimensionless  
Ukn. 11  relative cover as decimal fraction of Ukn. 11 
dimensionless  
Brassica  relative cover as decimal fraction of Brassica 
dimensionless  
Eucrypta floribunda  relative cover as decimal fraction of Eucrypta floribunda 
dimensionless  
Erisphyllum  relative cover as decimal fraction of Erisphyllum 
dimensionless  
Unk. 17  relative cover as decimal fraction of Unk. 17 
dimensionless  
Ukn. 16  relative cover as decimal fraction of Ukn. 16 
dimensionless  
Festuca  relative cover as decimal fraction of Festuca 
dimensionless  
Unk. 14  relative cover as decimal fraction of Unk. 14 
dimensionless  
Brumus  relative cover as decimal fraction of Brumus 
dimensionless  
Unknown 5 Erigeron_like  relative cover as decimal fraction of Unknown 5 Erigeron_like 
dimensionless  
Descorania  relative cover as decimal fraction of Descorania 
dimensionless  
Unk. 12  relative cover as decimal fraction of Unk. 12 
dimensionless  
Hackelia (floribunda?)  relative cover as decimal fraction of Hackelia (floribunda?) 
dimensionless  
Uknown 15 Baby Cryptantha  relative cover as decimal fraction of Uknown 15 Baby Cryptantha 
dimensionless  
Phacelia ramo  relative cover as decimal fraction of Phacelia ramo 
dimensionless  
Dichlostemma  relative cover as decimal fraction of Dichlostemma 
dimensionless  
Unk. 18  relative cover as decimal fraction of Unk. 18 
dimensionless  
Festucha  relative cover as decimal fraction of Festucha 
dimensionless  
Descarania  relative cover as decimal fraction of Descarania 
dimensionless  
UNKNG_1  relative cover as decimal fraction of UNKNG_1 
dimensionless  
Unk. 15  relative cover as decimal fraction of Unk. 15 
dimensionless  
Hustonia?  relative cover as decimal fraction of Hustonia? 
dimensionless  
Lotus Salsuginosus #1 (red marg.)  relative cover as decimal fraction of Lotus Salsuginosus #1 (red marg.) 
dimensionless  
Lotus #2  relative cover as decimal fraction of Lotus #2 
dimensionless  
Lotus #3 (sals.)  relative cover as decimal fraction of Lotus #3 (sals.) 
dimensionless  
Lotus  relative cover as decimal fraction of Lotus 
dimensionless  
Descour  relative cover as decimal fraction of Descour 
dimensionless  
Cauturisonia  relative cover as decimal fraction of Cauturisonia 
dimensionless  
UNK Cryptantha  relative cover as decimal fraction of UNK Cryptantha 
dimensionless  
VINE  relative cover as decimal fraction of VINE 
dimensionless  
Unk. 5 Stemmy Lotus  relative cover as decimal fraction of Unk. 5 Stemmy Lotus 
dimensionless  
unknown  relative cover as decimal fraction of unknown 
dimensionless  
total_shrub_cover  relative cover as decimal fraction of total_shrub_cover 
dimensionless  
Caulanthus lasiophyllus  relative cover as decimal fraction of Caulanthus lasiophyllus 
dimensionless  
Logfia arizonica  relative cover as decimal fraction of Logfia arizonica 
dimensionless  
Mirabilis bigelovii  relative cover as decimal fraction of Mirabilis bigelovii 
dimensionless  
Pholistoma auritum  relative cover as decimal fraction of Pholistoma auritum 
dimensionless  
Salvia columbariae  relative cover as decimal fraction of Salvia columbariae 
dimensionless  
Herniaria hirusta  relative cover as decimal fraction of Herniaria hirusta 
dimensionless  
Descurainia pinnata  relative cover as decimal fraction of Descurainia pinnata 
dimensionless  
Cryptantha pterocarya  relative cover as decimal fraction of Cryptantha pterocarya 
dimensionless  
Mentzelia affinis  relative cover as decimal fraction of Mentzelia affinis 
dimensionless  
Sonchus oleraceus  relative cover as decimal fraction of Sonchus oleraceus 
dimensionless  
Poa bigelovii  relative cover as decimal fraction of Poa bigelovii 
dimensionless  
Calandrinia ciliata  relative cover as decimal fraction of Calandrinia ciliata 
dimensionless  
Conyza canadensis  relative cover as decimal fraction of Conyza canadensis 
dimensionless  
Bromus rubens  relative cover as decimal fraction of Bromus rubens 
dimensionless  
Lasthenia californica  relative cover as decimal fraction of Lasthenia californica 
dimensionless  
Dichelostemma capitatum  relative cover as decimal fraction of Dichelostemma capitatum 
dimensionless  
Astragalus nuttallianus  relative cover as decimal fraction of Astragalus nuttallianus 
dimensionless  
Chamaesyce albomarginata  relative cover as decimal fraction of Chamaesyce albomarginata 
dimensionless  
sumSpp  cumulative fraction of annual species cover in plot calcuated prior to standardization 
dimensionless 
File: 655_desert_fertilization_sampling_sites_831acc7f333ecb80d147ca8e07874f9f.kml
Description: approximate location of desert fertiliztion longterm study sites