Small mammals in agricultural areas of the western llanos of Venezuela

Community structure, habitat associations, and relative densities

A. Utrera, G. Duno, B. A. Ellis, R. A. Salas, N. De Manzione, C. F. Fulhorst, R. B. Tesh, J. N. Mills

Research output: Contribution to journalArticle

25 Citations (Scopus)

Abstract

We used mark-recapture and removal trapping during 37 months to examine structure of small-mammal assemblages in agricultural and pastoral areas on the western llanos of Venezuela. Among 34 sites sampled, species richness, diversity, population densities, and relative contribution to the assemblage by 10 rodent and 3 marsupial species varied by habitat or land-use category, major vegetative formation, and (within agricultural systems) crop species. Most habitat types, especially relatively uniform areas of mechanized agriculture, were numerically dominated by 2 rodents, Sigmodon alstoni and Zygodontomys brevicauda. Subsistence agriculture plots were more variable and had the highest species richness and diversity. Peridomestic habitats were dominated by Rattus rattus. In contrast to findings in agroecosystems in the United States and Argentina, relative densities were not lower in crop fields than in adjacent borders nor were there differences in the structure of the rodent assemblages. Captures of Heteromys anomalus, Oecomys speciosus, and Oecomys trinitatus document range extensions for these species on the western llanos.

Original languageEnglish (US)
Pages (from-to)536-548
Number of pages13
JournalJournal of Mammalogy
Volume81
Issue number2
DOIs
StatePublished - 2000
Externally publishedYes

Fingerprint

Venezuela
Specific Gravity
small mammal
small mammals
rodent
Ecosystem
Mammals
Rodentia
community structure
rodents
agricultural land
Agriculture
species diversity
Sigmodon
habitat
species richness
habitats
Agricultural Crops
Sigmodontinae
subsistence agriculture

Keywords

  • Community structure
  • Habitat associations
  • Llanos
  • Oligoryzomys fulvescens
  • Rattus rattus
  • Sigmodon alstoni
  • Venezuela
  • Zygodontomys brevicauda

ASJC Scopus subject areas

  • Animal Science and Zoology

Cite this

Small mammals in agricultural areas of the western llanos of Venezuela : Community structure, habitat associations, and relative densities. / Utrera, A.; Duno, G.; Ellis, B. A.; Salas, R. A.; De Manzione, N.; Fulhorst, C. F.; Tesh, R. B.; Mills, J. N.

In: Journal of Mammalogy, Vol. 81, No. 2, 2000, p. 536-548.

Research output: Contribution to journalArticle

Utrera, A. ; Duno, G. ; Ellis, B. A. ; Salas, R. A. ; De Manzione, N. ; Fulhorst, C. F. ; Tesh, R. B. ; Mills, J. N. / Small mammals in agricultural areas of the western llanos of Venezuela : Community structure, habitat associations, and relative densities. In: Journal of Mammalogy. 2000 ; Vol. 81, No. 2. pp. 536-548.
@article{80cdc5c4881e4dad84ccb8654cd94820,
title = "Small mammals in agricultural areas of the western llanos of Venezuela: Community structure, habitat associations, and relative densities",
abstract = "We used mark-recapture and removal trapping during 37 months to examine structure of small-mammal assemblages in agricultural and pastoral areas on the western llanos of Venezuela. Among 34 sites sampled, species richness, diversity, population densities, and relative contribution to the assemblage by 10 rodent and 3 marsupial species varied by habitat or land-use category, major vegetative formation, and (within agricultural systems) crop species. Most habitat types, especially relatively uniform areas of mechanized agriculture, were numerically dominated by 2 rodents, Sigmodon alstoni and Zygodontomys brevicauda. Subsistence agriculture plots were more variable and had the highest species richness and diversity. Peridomestic habitats were dominated by Rattus rattus. In contrast to findings in agroecosystems in the United States and Argentina, relative densities were not lower in crop fields than in adjacent borders nor were there differences in the structure of the rodent assemblages. Captures of Heteromys anomalus, Oecomys speciosus, and Oecomys trinitatus document range extensions for these species on the western llanos.",
keywords = "Community structure, Habitat associations, Llanos, Oligoryzomys fulvescens, Rattus rattus, Sigmodon alstoni, Venezuela, Zygodontomys brevicauda",
author = "A. Utrera and G. Duno and Ellis, {B. A.} and Salas, {R. A.} and {De Manzione}, N. and Fulhorst, {C. F.} and Tesh, {R. B.} and Mills, {J. N.}",
year = "2000",
doi = "10.1644/1545-1542(2000)081<0536:SMIAAO>2.0.CO;2",
language = "English (US)",
volume = "81",
pages = "536--548",
journal = "Journal of Mammalogy",
issn = "0022-2372",
publisher = "Allen Press Inc.",
number = "2",

}

TY - JOUR

T1 - Small mammals in agricultural areas of the western llanos of Venezuela

T2 - Community structure, habitat associations, and relative densities

AU - Utrera, A.

AU - Duno, G.

AU - Ellis, B. A.

AU - Salas, R. A.

AU - De Manzione, N.

AU - Fulhorst, C. F.

AU - Tesh, R. B.

AU - Mills, J. N.

PY - 2000

Y1 - 2000

N2 - We used mark-recapture and removal trapping during 37 months to examine structure of small-mammal assemblages in agricultural and pastoral areas on the western llanos of Venezuela. Among 34 sites sampled, species richness, diversity, population densities, and relative contribution to the assemblage by 10 rodent and 3 marsupial species varied by habitat or land-use category, major vegetative formation, and (within agricultural systems) crop species. Most habitat types, especially relatively uniform areas of mechanized agriculture, were numerically dominated by 2 rodents, Sigmodon alstoni and Zygodontomys brevicauda. Subsistence agriculture plots were more variable and had the highest species richness and diversity. Peridomestic habitats were dominated by Rattus rattus. In contrast to findings in agroecosystems in the United States and Argentina, relative densities were not lower in crop fields than in adjacent borders nor were there differences in the structure of the rodent assemblages. Captures of Heteromys anomalus, Oecomys speciosus, and Oecomys trinitatus document range extensions for these species on the western llanos.

AB - We used mark-recapture and removal trapping during 37 months to examine structure of small-mammal assemblages in agricultural and pastoral areas on the western llanos of Venezuela. Among 34 sites sampled, species richness, diversity, population densities, and relative contribution to the assemblage by 10 rodent and 3 marsupial species varied by habitat or land-use category, major vegetative formation, and (within agricultural systems) crop species. Most habitat types, especially relatively uniform areas of mechanized agriculture, were numerically dominated by 2 rodents, Sigmodon alstoni and Zygodontomys brevicauda. Subsistence agriculture plots were more variable and had the highest species richness and diversity. Peridomestic habitats were dominated by Rattus rattus. In contrast to findings in agroecosystems in the United States and Argentina, relative densities were not lower in crop fields than in adjacent borders nor were there differences in the structure of the rodent assemblages. Captures of Heteromys anomalus, Oecomys speciosus, and Oecomys trinitatus document range extensions for these species on the western llanos.

KW - Community structure

KW - Habitat associations

KW - Llanos

KW - Oligoryzomys fulvescens

KW - Rattus rattus

KW - Sigmodon alstoni

KW - Venezuela

KW - Zygodontomys brevicauda

UR - http://www.scopus.com/inward/record.url?scp=0034426293&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0034426293&partnerID=8YFLogxK

U2 - 10.1644/1545-1542(2000)081<0536:SMIAAO>2.0.CO;2

DO - 10.1644/1545-1542(2000)081<0536:SMIAAO>2.0.CO;2

M3 - Article

VL - 81

SP - 536

EP - 548

JO - Journal of Mammalogy

JF - Journal of Mammalogy

SN - 0022-2372

IS - 2

ER -