Nom du corpus

Corpus Systématique Animale

Titre du document

Production efficiency in small mammal populations

Lien vers le document
Éditeur
Springer (journals)
Langue(s) du document
Anglais
Type de document
Research-article
Nom du fichier dans la ressource
Mammiferes_v2b_02556
Auteur(s)
  • W?adys?aw Grodzi?ski 1
  • Norman R. French 2
Affiliation(s)
  • 1) Department of Zoology and Physiology, University of Wyoming, 82071, Laramie, Wyoming, USA
  • 2) Research Institute of Colorado, Drake Creekside Two, 80526, Fort Collins, Colorado, USA
Résumé

Data from 102 populations of small mammals from 9 ecosystem types in Europe and in North and Central America were analyzed to define the relationship between productivity and respiration in insectivore and rodent populations. Productivity includes addition of new tissue in the form of growth of individual members of the population and new individuals added by reproduction. All data were recalculated to kilojoules per hectare per year. Linear regression was performed on logarithmic transformation of the data to determine the allometric form of the equation relating production to respiration. The relationship for rodents was determined to be: P=0.026 R 1.008 The relationship for shrews was significantly different both in slope and intercept from that for rodents, and was determined to be: P=0.543 R 0.628 The data were also divided according to functional group or trophic level, in addition to taxonomic grouping. Significant differences were found between herbivores and granivores but not among taxonomic divisions other than the Insectivora. Thus, ecological energetics of small mammals is correlated with trophic position but not with taxonomic position. These equations can be used for prediction of production in rodent and shrew populations where the biomass or respiration is known, thereby aiding the evaluation of trophic relationships in terrestrial communities. Production efficiency is lowest for insectivores (0.7%), and is higher for granivores (2.3%), omnivores (2.6%), and for herbivores (3.4%). The three parameters of respiration, production and assimilation define the conditions for existence of individual mammal populations. Population growth characteristics and species strategies are correlated with energetics and moderated through diet selection by the environment.

Catégories Science-Metrix
  • 1 - natural sciences
  • 2 - biology
  • 3 - ecology
Catégories INIST
  • 1 - sciences appliquees, technologies et medecines
  • 2 - sciences biologiques et medicales
  • 3 - sciences biologiques fondamentales et appliquees. psychologie
Catégories Scopus
  • 1 - Life Sciences ; 2 - Agricultural and Biological Sciences ; 3 - Ecology, Evolution, Behavior and Systematics
Catégories WoS
  • 1 - science ; 2 - ecology
Identifiant ISTEX
24F2F64767236263D4179509DB7B43756C7DED11
Revue

Oecologia

Année de publication
1983
Présence de XML structuré
Non
Version PDF
1.3
Score qualité du texte
9.669
Sous-corpus
  • Mammiferes
Type de publication
Journal
ark:/67375/1BB-0VNSN7DQ-6
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