mark-recapture

Dataset: 

Study number: 

262

Data set ID: 

210262010

Date range: 

2004-01-01 to 2014-12-31

Original investigator: 

Brandon Bestelmeyer

Data contact: 

Abstract: 

   OBJECTIVE:  The purpose of the study is to investigate how pulses of precipitation translate
   into pulses of plant above ground net primary productivity (NPP) and how the small mammal
   community responds to such changes also in relation to shrub gradient across the landscape.

   OBJECTIVE:  The purpose of the study is to investigate how pulses of precipitation translate
   into pulses of plant above ground net primary productivity (NPP) and how the small mammal
   community responds to such changes also in relation to shrub gradient across the landscape.
   Particularly we are interested in how the energy flows through the ecosystem in response to
   pulses of rain.

   HYPOTHESES:
   1) Small mammal abundance should respond positively to precipitation and NPP.
   2) On a temporal scale, the small mammal energy use should show parallel fluxes along the
      shrub gradient.

   Variables measured:  Rodent abundance expressed as Minimum Number Known Alive (MNKA),
                        rodent biomas, rodent energy, and rodent species richness.

Data download: 

Description: 

CSV data file for Jornada dataset: Ecotone Rodent 1st Capture Metrics (abundance, biomass, energy, species richness)

CSV data file for Jornada dataset: Ecotone Rodent 1st Capture Metrics (abundance, biomass, energy, species richness)

LTER Core Area(s): 

Keywords: 

Dataset: 

Study number: 

262

Data set ID: 

210262008

Date range: 

2004-07-13 to 2014-10-24

Original investigator: 

Brandon Bestelmeyer

Data contact: 

Abstract: 

   OBJECTIVE:  The purpose of the study is to investigate how pulses of precipitation translate into
   pulses of plant above ground net primary productivity (NPP) and how the small mammal community
   responds to such changes also in relation to shrub gradient across the landscape.  Particularly

   OBJECTIVE:  The purpose of the study is to investigate how pulses of precipitation translate into
   pulses of plant above ground net primary productivity (NPP) and how the small mammal community
   responds to such changes also in relation to shrub gradient across the landscape.  Particularly
   we are interested in how the energy flows through the ecosystem in response to pulses of rain,
   how the small mammal community partition resources (in terms of C3 (forbs and shrubs) and C4
   (grasses) plants) and how the genetic structure of some species (i.e.:  Dipodomys spp.) is
   affected by their population dynamics.

   HYPOTHESES:
   1) Small mammal abundance should respond positively to precipitation and NPP.
   2) On a temporal scale, the small mammal energy use should show parallel fluxes along the shrub
      gradient.
   3) The small mammal community should consume C3 and C4 plants according to their availability (or
      NPP).
   4) At low population density, dispersal should be limited and the genetic variance will be
      distributed among populations rather than within (i.e., Fst will trend towards higher values).
      After pulses of rain and NPP, population densities will be greater, dispersal prevalent, and
      the genetic variance of populations will be distributed within populations (i.e., Fst will
      approach zero) as dispersal homogenizes populations.

   Variables include rodent species, sex, reproductive status, weight, and maturity status were recorded.

Data download: 

Description: 

CSV data file for the Jornada dataset: Ecotone Rodent Trapping 1st Capture

CSV data file for the Jornada dataset: Ecotone Rodent Trapping 1st Capture

LTER Core Area(s): 

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