populations

Arthropod Pitfall Traps-III in 5x1 grid at LTER II NPP sites

Study number: 

8

Data set ID: 

2100008001

Original investigator: 

John Anderson

Abstract: 

Objectives. Desertification is hypothesized to have
altered the spatial and temporal availability of resources
required by the biota. Results of desertification on the
Jornada include changes to shrub dominated communities and
major soil changes. We hypothesize that these shifts in
vegetation have changed resources temporally for many of the

Objectives. Desertification is hypothesized to have
altered the spatial and temporal availability of resources
required by the biota. Results of desertification on the
Jornada include changes to shrub dominated communities and
major soil changes. We hypothesize that these shifts in
vegetation have changed resources temporally for many of the
consumers. If grassland systems respond to rainfall without
significant lags, but shrub systems do not, then consumer
species should reflect these differences. In addition,
shifts from grassland to shrubland results in greater
structural heterogeneity of the habitats. We have
hypothesized that consumer populations, diversity, and
densities of some consumers will be higher in grasslands
than in shrublands. Diversity and/or densities are
hypothesized to be related to the NPP of the sites. Data
will be collected for the duration of the LTER program in
order to provide data to test these hypotheses.
Data for arthropods captured in pitfall traps on LTER
III consumer plots at 2 month intervals. Data includes
order, family, genus, species, and number.

Small mammal trapping (LTER-II)

Study number: 

5

Data set ID: 

210005001

Original investigator: 

John Anderson

Abstract: 

Small mammal live-traps are located on consumer pitfall plots. A grid of 20 traps is located on each consumer plot. Small mammals are trapped daily for a one-week period in the late spring and again in the late summer of each year. Data on species, sex, toe marks, weight, and reproductive condition are taken.

Pitfall trap grids have been installed at three creosotebush sites, three grassland sites, three mesquite sites, and two tarbush sites. Jornada LTER II consumer plots during this period were located at T-WEST, T- EAST, M-RABB (2 grids), M-WELL, G-IBPE (2 grids), G-BASN, C-SAND (2 grids), and C-CALI sites.

Data download: 

Arthropod Pitfall Traps-II in 4x4 grid at LTER II NPP sites

Study number: 

8

Data set ID: 

2100008002

Original investigator: 

John Anderson

Abstract: 

Data for arthropods captured in pitfall traps on LTER II
consumer plots. Data includes order, family, genus,
species, and number.

Data for arthropods captured in pitfall traps on LTER II
consumer plots. Data includes order, family, genus,
species, and number.

Animal Transect Data

Study number: 

9

Data set ID: 

2100009001

Original investigator: 

David Lightfoot

Data contact: 

Abstract: 

Data for rabbits, birds, and lizards recorded from the LTER II animal transects. Data consists of species names, numbers of individuals, and distances observed from transects. Data is collected from each transect once every two weeks. See history file for exceptions.

Data for rabbits, birds, and lizards recorded from the LTER II animal transects. Data consists of species names, numbers of individuals, and distances observed from transects. Data is collected from each transect once every two weeks. See history file for exceptions.

Data download: 

Lizard pitfall trap data (LTER-II, LTER-III)

Study number: 

7

Data set ID: 

2100007001

Original investigator: 

David Lightfoot

Data contact: 

Abstract: 

In conjunction with net primary production studies, consumer and faunal studies are conducted at or near NPP sites using pitfall traps. We use live traps, not employing ethylene glycol or other killing/preservative agents, with traps checked once a week at the minimum. Sampling-with-replacement is used with the lizards.

Variables measured include species, sex, recapture status, snout-vent length, total length, weight, and whether tail is broken or whole.

Data download: 

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