Data Package Metadata View Summary

Invasive buffel grass (Cenchrus ciliaris) increases water stress and reduces growth of native foothills palo verde (Parkinsonia microphylla) seedlings in pot experiments

General Information

Data Package:
Local Identifier:	edi.642.1
Title:	Invasive buffel grass (Cenchrus ciliaris) increases water stress and reduces growth of native foothills palo verde (Parkinsonia microphylla) seedlings in pot experiments
Alternate Identifier:	DOI PLACE HOLDER
Abstract:	Although buffel grass (Cenchrus ciliaris) invasions on several continents have significant ecological impacts, little information is available on its effect on seedling emergence and establishment of native vegetation. In highly impacted areas of the Sonoran Desert of North America, perennial plants are particularly vulnerable during their seedling stage. We studied the impact of buffel grass on the emergence, survival, and water stress in the seedlings of a locally dominant native tree, the foothills palo verde (Parkinsonia microphylla), using two pot experiments. In the first experiment, we compared the germination, growth, and survival of concentric rings of palo verde seedlings around mature individuals of buffel grass, a native shrub of a similar diameter and height to buffel grass, or in a pot with bare soil. In the second experiment, we compared the competitive effects of buffel grass seedlings on palo verde seedlings with the effects of conspecific seedlings, again using germination, growth, and survival as metrics. We followed up both experiments by quantifying the ratio of stable carbon isotopes in the tissues of the palo verde seedlings, which can be an indicator of water stress. We found evidence of relatively greater water stress in palo verde seedlings grown with buffel grass seedlings in pots than those grown with no competitor, and reduced survival of palo verde seedlings when grown with mature buffel grass. Our results highlight the need for more manipulative studies of density to improve mechanistic understanding of population dynamics, and to forecast how populations and communities will respond in the long term to perturbations such as invasion.
Publication Date:	2020-11-30

Time Period

Begin:

2013-08-01

End:

2015-07-31

People and Organizations
Contact:	Sommers, Pacifica (University of Arizona (Tucson, AZ) and University of Colorado Boulder (Boulder, CO)) [ email ]
Contact:	Chesson, Peter (University of Arizona (Tucson, AZ) and National Chung Hsing University (Taichung, Taiwan)) [ email ]
Creator:	Sommers, Pacifica (University of Arizona (Tucson, AZ) and University of Colorado Boulder (Boulder, CO))
Creator:	Davis, Ashley (University of Arizona (Tucson, AZ) and Arizona State University (Tempe, AZ))
Creator:	Chesson, Peter (University of Arizona (Tucson, AZ) and National Chung Hsing University (Taichung, Taiwan))
Associate:	Mettler, Timothy (University of Arizona, Watered Pots, Data Entry)
Associate:	Gutridge, Racheal (University of Arizona, Watered Pots, Data Entry)
Associate:	Ouanzin, Johanna (University of Arizona, Watered Pots, Data Entry)
Associate:	Zegeer, Abreeza (University of Arizona, Assisted With Soil Collection And Set Up)

Data Entities
Data Table Name:	First pot experiment mass
Description:	First pot experiment mass
Data Table Name:	First pot experiment survival
Description:	First pot experiment survival
Data Table Name:	Second pot experiment
Description:	Second pot experiment
Data Table Name:	Stable isotopes
Description:	Stable isotopes
Other Name:	First pot experiment R script
Description:	A script to analyze the seedling emergence, survival, and biomass attained in the first pot experiment
Other Name:	Second pot experiment R script
Description:	A script to analyze the seedling emergence, survival, and biomass attained in the second pot experiment
Other Name:	Stable isotopes R script
Description:	A script to compare delta_C_13 values between palo verde seedlings grown with and without mature and seedling buffel grass

Detailed Metadata

Data Entities

Data Table


Data:	https://pasta-s.lternet.edu/package/data/eml/edi/642/1/9324d6bb25bbb4d8ea6ddf22f19af1be
Name:	First pot experiment mass
Description:	First pot experiment mass
Number of Records:	371
Number of Columns:	9

Table Structure

Object Name:

First_pot_experiment_mass.csv

Size:

9932 bytes

Authentication:

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Text Format:

Number of Header Lines:

Record Delimiter:

Orientation:

column

Simple Delimited:

Field Delimiter:	,
Quote Character:	"

Table Column Descriptions

Column Name:

Plant

Tub

Block

Radius

Position

Vigor

Height

Depth

DryMass

Definition:

plant ID within pot

Pot seedling was grown in (each line is a seedling)

Spatial block, in which one of each treatment level (mature plant presence) was placed together to eliminate artifacts from spatial heterogeneity

Which concentric ring around buffel grass adult seedling was in. Value of 1-4 for four concentric rings of seedlings in first experiment

Cardinal direction of seedling from buffel grass within a pot

Subjective score of seedling’s perceived vigor at harvesting on day 38

Height from soil surface to highest point

Length of longest root upon harvesting

Biomass after seedling was dried in drying oven

Storage Type:

string

float

Measurement Type:

nominal

ratio

Measurement Values Domain:

Definition

plant ID within pot

Definition

Pot seedling was grown in (each line is a seedling)

Definition

Spatial block, in which one of each treatment level (mature plant presence) was placed together to eliminate artifacts from spatial heterogeneity

Definition

Which concentric ring around buffel grass adult seedling was in. Value of 1-4 for four concentric rings of seedlings in first experiment

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	a
Definition	east
Source

Code Definition

Code	b
Definition	southeast
Source

Code Definition

Code	c
Definition	southwest
Source

Code Definition

Code	d
Definition	west
Source

Code Definition

Code	e
Definition	northwest
Source

Code Definition

Code	f
Definition	northeast
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	0
Definition	dead
Source

Code Definition

Code	1
Definition	withered but still apparently living
Source

Code Definition

Code	2
Definition	some leaflets turning colors or wilting, but otherwise healthy
Source

Code Definition

Code	3
Definition	green and strong
Source

Unit	centimeter
Type	real
Min	3.4
Max	20.5

Unit	centimeter
Type	real
Min	2.2
Max	28.8

Unit	milligram
Type	real
Min	0.02
Max	1.283

Missing Value Code:

Code	NA
Expl	not available

Code	NA
Expl	not available

Code	NA
Expl	not available

Accuracy Report:

Accuracy Assessment:

Coverage:

Methods:

Data Table


Data:	https://pasta-s.lternet.edu/package/data/eml/edi/642/1/bf4b383c3b41d0546443c3c64b437a43
Name:	First pot experiment survival
Description:	First pot experiment survival
Number of Records:	432
Number of Columns:	5

Table Structure

Object Name:

First_pot_experiment_survival.csv

Size:

6722 bytes

Authentication:

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Text Format:

Number of Header Lines:

Record Delimiter:

Orientation:

column

Simple Delimited:

Field Delimiter:	,
Quote Character:	"

Table Column Descriptions

Column Name:

Tub

Block

Type

Germ

Day38

Definition:

Pot seedling was grown in (each line is a seedling)

Spatial block, in which one of each treatment level (mature plant presence) was placed together to eliminate artifacts from spatial heterogeneity

Treatment level of mature plant presence

Whether each scarified seed planted germinated

Whether each seedling was still living after 38 days

Storage Type:

string

Measurement Type:

nominal

Measurement Values Domain:

Definition

Pot seedling was grown in (each line is a seedling)

Definition

Spatial block, in which one of each treatment level (mature plant presence) was placed together to eliminate artifacts from spatial heterogeneity

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	Buffel
Definition	mature buffel grass individual
Source

Code Definition

Code	Bursage
Definition	mature triangle-leaf bursage indiviual
Source

Code Definition

Code	Empty
Definition	no mature plant
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	1
Definition	seedling emerged, indicating germination
Source

Code Definition

Code	0
Definition	no seedling emerged
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	1
Definition	seedling alive
Source

Code Definition

Code	0
Definition	seedling had died
Source

Missing Value Code:

Accuracy Report:

Accuracy Assessment:

Coverage:

Methods:

Data Table


Data:	https://pasta-s.lternet.edu/package/data/eml/edi/642/1/ca2950b72ee15189c635b22864b2ceff
Name:	Second pot experiment
Description:	Second pot experiment
Number of Records:	323
Number of Columns:	12

Table Structure

Object Name:

Second_pot_experiment.csv

Size:

15273 bytes

Authentication:

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Text Format:

Number of Header Lines:

Record Delimiter:

Orientation:

column

Simple Delimited:

Field Delimiter:	,
Quote Character:	"

Table Column Descriptions

Column Name:

Germinated

Survived_to_experiment_end

Block_in_greenhouse

Side_of_table

Row_on_table

Role_in_experiment

Role

Seedling_species

Focal

Mg_dry_wt_at_experiment_end

Species_of_impact

Type_of_impact

Definition:

Whether or not the scarified palo verde seed planted in a given pot germinated

Whether or not the focal palo verde seedling in a given pot survived to the end of the experiment

Pots were arranged in spatial blocks, with pots of each treatment level spatially clustered

Whether the block of pots was on the south or north side of the table in the greenhouse, which received slightly different amounts of light

Row within each spatial block

Variable group seedlings by whether they were involved in a buffel grass impact on palo verde, a conspecific impact on palo verde, or a control with no seedling impacting the palo verde

The experiment was initially set up to test whether leachate from conspecifics or from buffel grass limited the growth of palo verde seedlings due to allelopathy

Species of seedling

Whether this seedling was the focal individual for measuring impact of the other within the experiment

Milligrams of biomass measured for the total seedling after drying in a drying oven

Whether the non-focal seedling either donating drained leachate to or in the pot competing with the focal seedling was palo verde or buffel grass or just bare soil (no seedling)

The experiment was initially set up to test whether leachate from conspecifics or from buffel grass limited the growth of palo verde seedlings due to allelopathy

Storage Type:

string

float

string

Measurement Type:

nominal

ratio

nominal

Measurement Values Domain:

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	1
Definition	seed germinated
Source

Code Definition

Code	0
Definition	seed did not germinate
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	1
Definition	seedling survived to end of experiment
Source

Code Definition

Code	0
Definition	seedling died before end of experiment
Source

Code Definition

Code	11
Definition	not described
Source

Definition

Pots were arranged in spatial blocks, with pots of each treatment level spatially clustered

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	S
Definition	South
Source

Code Definition

Code	N
Definition	North
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	X
Definition	furthest east
Source

Code Definition

Code	Y
Definition	middle
Source

Code Definition

Code	Z
Definition	furthest west
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	A
Definition	palo verde impacted by conspecific
Source

Code Definition

Code	B
Definition	palo verde impacted by buffel grass
Source

Code Definition

Code	C
Definition	palo verde impacted by no seedling (just bare soil)
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	D
Definition	donor seedling donating leachate to a recipient pot
Source

Code Definition

Code	R
Definition	recipient which was watered with leachate from donor
Source

Code Definition

Code	P
Definition	competition experiment in which water was added to the pot straight from the tap, and not collected afterwards
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	PV
Definition	palo verde (Parkinsonia microphylla)
Source

Code Definition

Code	BG
Definition	buffel grass (Cenchrus ciliaris)
Source

Code Definition

Code	CACTUS
Definition	CACTUS
Source

Code Definition

Code	VOLUNTEER
Definition	VOLUNTEER
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	F
Definition	this seedling was the focal response seedling
Source

Code Definition

Code	NF
Definition	this seedling was the non-focal seedling creating the impact on the other
Source

Unit	milligram
Type	real
Min	0
Max	3185

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	Pennisetum
Definition	buffel grass
Source

Code Definition

Code	Parkinsonia
Definition	palo verde (conspecific)
Source

Code Definition

Code	Control
Definition	no seedling just bare soil
Source

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	Leachate
Definition	water that had drained through a donor pot was added if recipient or water was drained through that pot if a donor
Source

Code Definition

Code	Competition
Definition	water was added to that pot directly
Source

Missing Value Code:

Code	NA
Expl	not available

Accuracy Report:

Accuracy Assessment:

Coverage:

Methods:

Data Table


Data:	https://pasta-s.lternet.edu/package/data/eml/edi/642/1/392beff3c18174367b51cb58e373c154
Name:	Stable isotopes
Description:	Stable isotopes
Number of Records:	160
Number of Columns:	8

Table Structure

Object Name:

Stable_isotopes.csv

Size:

5248 bytes

Authentication:

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Text Format:

Number of Header Lines:

Record Delimiter:

\r\n

Orientation:

column

Simple Delimited:

Field Delimiter:	,
Quote Character:	"

Table Column Descriptions

Column Name:

Study

Spatial_block_of_pot

Replicate

Position_within_pot_or_block

Radius_from_buffel_adult

Treatment_level

delta_13_C

delta_15_N

Definition:

Whether the seedling came from the first pot experiment, conducted in 2013, or the second pot experiment, conducted in 2015

In both studies, pots were arranged in spatial blocks, with pots of each treatment level spatially clustered

Pot in first (2013) experiment or spatial cluster in second (2015) experiment

In first (2013) experiment, indicates cardinal direction of seedling from buffel grass within a pot; in second (2015) experiment it designates whether the pot within the spatial block received a buffel grass or no competitor

In first (2013) experiment, it refers to which concentric ring around buffel grass adult seedling was in; in second experiment seedlings were one per pot, so all values are 0 because it is not a factor. Value of 1-4 for four concentric rings of seedlings in first experiment

Whether palo verde seedling had been grown in a pot with or without buffel grass

Ratio of C13 to C12 within palo verde seedling tissue, normalized and compared with atmospheric values

Ratio of N15 to N14 within palo verde seedling tissue, normalized and compared with atmospheric values

Storage Type:

string

float

Measurement Type:

nominal

ratio

Measurement Values Domain:

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	2013
Definition	seedling from first pot experiment
Source

Code Definition

Code	2015
Definition	seedling from second pot experiment
Source

Definition

In both studies, pots were arranged in spatial blocks, with pots of each treatment level spatially clustered

Definition

Pot in first (2013) experiment or spatial cluster in second (2015) experiment

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	a
Definition	east
Source

Code Definition

Code	b
Definition	southeast
Source

Code Definition

Code	c
Definition	southwest
Source

Code Definition

Code	d
Definition	west
Source

Code Definition

Code	e
Definition	northwest
Source

Code Definition

Code	f
Definition	northeast
Source

Code Definition

Code	B
Definition	buffel grass
Source

Code Definition

Code	C
Definition	no buffel grass
Source

Definition

Allowed Values and Definitions

Enumerated Domain

Code Definition

Code	Buffel
Definition	palo verde seedling was grown in a pot with buffel grass
Source

Code Definition

Code	Control
Definition	palo verde seedling was grown in a pot without buffel grass
Source

Unit	dimensionless
Type	real
Min	-28.7
Max	-20.1

Unit	dimensionless
Type	real
Min	2.5
Max	8.9

Missing Value Code:

Code	NA
Expl	not available

Accuracy Report:

Accuracy Assessment:

Coverage:

Methods:

Non-Categorized Data Resource

Name:

First pot experiment R script

Entity Type:

unknown

Description:

A script to analyze the seedling emergence, survival, and biomass attained in the first pot experiment

Physical Structure Description:

Object Name:

First_pot_experiment_r.R

Size:

5861 bytes

Authentication:

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Externally Defined Format:

Format Name:

text/plain

Data:

https://pasta-s.lternet.edu/package/data/eml/edi/642/1/aee211ecd09cc0a1c6b5faeefd9560f2

Non-Categorized Data Resource

Name:

Second pot experiment R script

Entity Type:

unknown

Description:

A script to analyze the seedling emergence, survival, and biomass attained in the second pot experiment

Physical Structure Description:

Object Name:

Second_pot_experiment_r.R

Size:

3603 bytes

Authentication:

8ce6fa9f09cdb43bfa8822fd64ee1c43 Calculated By MD5

Externally Defined Format:

Format Name:

text/plain

Data:

https://pasta-s.lternet.edu/package/data/eml/edi/642/1/3bf8515ef47df40bfbdd74775f8f86b1

Non-Categorized Data Resource

Name:

Stable isotopes R script

Entity Type:

unknown

Description:

A script to compare delta_C_13 values between palo verde seedlings grown with and without mature and seedling buffel grass

Physical Structure Description:

Object Name:

Stable_isotopes_r.R

Size:

12124 bytes

Authentication:

7f8b867c4f59e82ade7401ed2bcfecf1 Calculated By MD5

Externally Defined Format:

Format Name:

text/plain

Data:

https://pasta-s.lternet.edu/package/data/eml/edi/642/1/12f23d1a92058cdad76e277ab8de456d

Data Package Usage Rights

This information is released under the Creative Commons license - Attribution - CC BY (https://creativecommons.org/licenses/by/4.0/). The consumer of these data (\"Data User\" herein) is required to cite it appropriately in any publication that results from its use. The Data User should realize that these data may be actively used by others for ongoing research and that coordination may be necessary to prevent duplicate publication. The Data User is urged to contact the authors of these data if any questions about methodology or results occur. Where appropriate, the Data User is encouraged to consider collaboration or co-authorship with the authors. The Data User should realize that misinterpretation of data may occur if used out of context of the original study. While substantial efforts are made to ensure the accuracy of data and associated documentation, complete accuracy of data sets cannot be guaranteed. All data are made available \"as is.\" The Data User should be aware, however, that data are updated periodically and it is the responsibility of the Data User to check for new versions of the data. The data authors and the repository where these data were obtained shall not be liable for damages resulting from any use or misinterpretation of the data. Thank you.

Keywords

By Thesaurus:
LTER Controlled Vocabulary	invasive species, grasses, seedlings, competition, biomass, isotopes
(No thesaurus)	Tucson Mountains, University of Arizona

Methods and Protocols

These methods, instrumentation and/or protocols apply to all data in this dataset:

Methods and protocols used in the collection of this data package

Description:

To determine how mature buffel grass affects water stress in palo verde seedlings, we planted 24 scarified palo verde seeds in each of 18 large pots (approx. 30 x 60 cm, and 15 cm deep) containing soil from the Tucson Mountains outside the greenhouse at the University of Arizona in August, 2013. Six of the pots contained mature tussocks of invasive grass transplanted from the Tucson Mountains. Six other pots received mature individuals of the native shrub triangle-leaf bursage (Ambrosia deltoidea), which is a common ground cover of similar height and diameter to the invasive grass. The final six tubs had no adult plant. Tubs were arranged randomly within spatial blocks of equal numbers of adult plant types. Supplemental water (4 s daily from a hose, 5 d/week) was provided throughout the five-week experiment to provide conditions suitable for seedling establishment. Temperatures during the experiment ranged from 19degree to 42degreeC, with 10-94% relative humidity. We harvested the seedlings and then dried them for 3 d at 60degreeC before weighing them and grinding them for stable isotope analysis.

Whole palo verde seedlings were homogenized with a ball mill so their tissue could be uniformly sampled. The University of Arizona's Environmental Isotope Laboratory measured δ13C and δ15N of the seedlings on a continuous-flow gas-ratio mass spectrometer (Finnigan Delta PlusXL) coupled to an elemental analyzer (Costech). Samples were combusted in the elemental analyzer. Standardization is based on acetanilide for elemental concentration, NBS-22 and USGS-24 for δ13C. Precision is better than ± 0.10 for delta13C based on repeated internal standards.

We then conducted a second greenhouse pot experiment to determine whether seedlings of buffel grass induce the same mortality and water stress in palo verde seedlings as the mature plants did. In April, 2015, we germinated 32 scarified palo verde seeds each in a 4-in pot with 2-8 week-old buffel grass seedlings. In addition, we germinated 32 seeds each with a 2-8 week old conspecific as a positive control, and an additional 32 seeds with no competitor in the pot as negative controls, for a total of 96 focal seedlings. Each pot received 50 ml tap water three days a week. A spatially blocked design ensured treatment levels were all present in all areas of the greenhouse work tables. Temperatures inside the greenhouse ranged from 23-44oC, with 16-60% relative humidity. We harvested seedlings after 30 days, placed them in the drying oven at 60oC for at least two days before weighing them. We also sampled the soil in 16-17 pots of each treatment level (total of 50) to determine whether pH differed between seedling types. To measure pH in soil, 5 g soil was mixed with 10 ml de-ionized water, and shaken for 15 minutes. After the soil had settled for 30 minutes, a VWR SympHony SB20 was used to measure the pH, and rinsed with de-ionized water between samples.

People and Organizations

Publishers:

Organization:

Environmental Data Initiative

Email Address:

info@environmentaldatainitiative.org

Web Address:

https://environmentaldatainitiative.org

Creators:

Individual:

Pacifica Sommers

Organization:

University of Arizona (Tucson, AZ) and University of Colorado Boulder (Boulder, CO)

Email Address:

Pacifica.somers@colorado.edu

Individual:

Ashley Davis

Organization:

University of Arizona (Tucson, AZ) and Arizona State University (Tempe, AZ)

Email Address:

ardavi23@asu.edu

Individual:

Peter Chesson

Organization:

University of Arizona (Tucson, AZ) and National Chung Hsing University (Taichung, Taiwan)

Email Address:

pchesson@email.arizona.edu

Contacts:

Individual:

Pacifica Sommers

Organization:

University of Arizona (Tucson, AZ) and University of Colorado Boulder (Boulder, CO)

Email Address:

Pacifica.somers@colorado.edu

Individual:

Peter Chesson

Organization:

University of Arizona (Tucson, AZ) and National Chung Hsing University (Taichung, Taiwan)

Email Address:

pchesson@email.arizona.edu

Associated Parties:

Individual:

Timothy Mettler

Organization:

University of Arizona

Email Address:

tmettlergcc@gmail.com

Role:

Watered Pots, Data Entry

Individual:

Racheal Gutridge

Organization:

University of Arizona

Email Address:

rachealg@email.arizona.edu

Role:

Watered Pots, Data Entry

Individual:

Johanna Ouanzin

Organization:

University of Arizona

Email Address:

johannaouanzin@email.arizona.edu

Role:

Watered Pots, Data Entry

Individual:

Abreeza Zegeer

Organization:

University of Arizona

Email Address:

azegeer@cals.arizona.edu

Role:

Assisted With Soil Collection And Set Up

Temporal, Geographic and Taxonomic Coverage

Temporal, Geographic and/or Taxonomic information that applies to all data in this dataset:

Time Period

Begin:

2013-08-01

End:

2015-07-31

Sampling Site:

Description:

soil collection in Tucson Mountains

Site Coordinates:

Longitude (degree):

-111

Latitude (degree):

32.2

Sampling Site:

Description:

University of Arizona greenhouse

Site Coordinates:

Longitude (degree):

-110.955037

Latitude (degree):

32.225235

Taxonomic Range:

Classification:

Rank Name:

kingdom

Rank Value:

Plantae

Classification:

Rank Name:

subkingdom

Rank Value:

Viridiplantae

Classification:

Rank Name:

infrakingdom

Rank Value:

Streptophyta

Classification:

Rank Name:

superdivision

Rank Value:

Embryophyta

Classification:

Rank Name:

division

Rank Value:

Tracheophyta

Classification:

Rank Name:

subdivision

Rank Value:

Spermatophytina

Classification:

Rank Name:

class

Rank Value:

Magnoliopsida

Classification:

Rank Name:

superorder

Rank Value:

Rosanae

Classification:

Rank Name:

order

Rank Value:

Fabales

Classification:

Rank Name:

family

Rank Value:

Fabaceae

Classification:

Rank Name:

genus

Rank Value:

Parkinsonia

Classification:

Rank Name:	species
Rank Value:	Parkinsonia microphylla

Classification:

Rank Name:

kingdom

Rank Value:

Plantae

Classification:

Rank Name:

subkingdom

Rank Value:

Viridiplantae

Classification:

Rank Name:

infrakingdom

Rank Value:

Streptophyta

Classification:

Rank Name:

superdivision

Rank Value:

Embryophyta

Classification:

Rank Name:

division

Rank Value:

Tracheophyta

Classification:

Rank Name:

subdivision

Rank Value:

Spermatophytina

Classification:

Rank Name:

class

Rank Value:

Magnoliopsida

Classification:

Rank Name:

superorder

Rank Value:

Lilianae

Classification:

Rank Name:

order

Rank Value:

Poales

Classification:

Rank Name:

family

Rank Value:

Poaceae

Classification:

Rank Name:

genus

Rank Value:

Cenchrus

Classification:

Rank Name:	species
Rank Value:	Cenchrus ciliaris

Classification:

Rank Name:

kingdom

Rank Value:

Plantae

Classification:

Rank Name:

subkingdom

Rank Value:

Viridiplantae

Classification:

Rank Name:

infrakingdom

Rank Value:

Streptophyta

Classification:

Rank Name:

superdivision

Rank Value:

Embryophyta

Classification:

Rank Name:

division

Rank Value:

Tracheophyta

Classification:

Rank Name:

subdivision

Rank Value:

Spermatophytina

Classification:

Rank Name:

class

Rank Value:

Magnoliopsida

Classification:

Rank Name:

superorder

Rank Value:

Asteranae

Classification:

Rank Name:

order

Rank Value:

Asterales

Classification:

Rank Name:

family

Rank Value:

Asteraceae

Classification:

Rank Name:

genus

Rank Value:

Ambrosia

Classification:

Rank Name:	species
Rank Value:	Ambrosia deltoidea

Project

Parent Project Information:

Title:

Extended multitrophic diversity maintenance theory

Personnel:

Individual:	Peter Chesson
Role:	Principal Investigator

Funding:

National Science Foundation Division of Environmental Biology 1353715

Related Project:

Title:

The role of herbivory and competition in the dominance of a non-native grass

Personnel:

Individual:	Pacifica Sommers
Role:	Principal Investigator

Funding:

Western National Park Association 13-07

Maintenance

Maintenance:

Description:	completed
Frequency:

Other Metadata

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Data Package Metadata View Summary

Invasive buffel grass (Cenchrus ciliaris) increases water stress and reduces growth of native foothills palo verde (Parkinsonia microphylla) seedlings in pot experiments

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Data Table

Data Table

Data Table

Data Table

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Non-Categorized Data Resource

Non-Categorized Data Resource

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Methods and Protocols

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Data Package Metadata View Summary

Invasive buffel grass (Cenchrus ciliaris) increases water stress and reduces growth of native foothills palo verde (Parkinsonia microphylla) seedlings in pot experiments

+/- Data Entities

Data Table

Data Table

Data Table

Data Table

Non-Categorized Data Resource

Non-Categorized Data Resource

Non-Categorized Data Resource

+/- Data Package Usage Rights

+/- Keywords

+/- Methods and Protocols

These methods, instrumentation and/or protocols apply to all data in this dataset:

+/- People and Organizations

+/- Temporal, Geographic and Taxonomic Coverage

+/- Project

Parent Project Information:

+/- Maintenance

Data Entities

Data Package Usage Rights

Keywords

Methods and Protocols

People and Organizations

Temporal, Geographic and Taxonomic Coverage

Project

Maintenance