Ecological tracers can quantify food web structure and change / Craig E. Hebert, Michael T. Arts, D.V. Chip Weseloh. : En13-5/05-187E-PDF

"Disruption of natural food webs is becoming a commonplace occurrence as a result of human activities. Harvesting of natural resources (e.g. fishing), climate change, and the introduction of exotic species are but a few of the processes that can significantly alter food web structure and function. It is within this rapidly changing ecological context that we must improve our ability to define food web structure as well as detect and understand the implications of food web change. To do so requires the development, validation, and application of ecological tracers that can provide insights into the movement of energy, nutrients, and contaminants through food webs. In this study, we examine the utility of two groups of naturally-occurring intrinsic tracers to provide such information in a predatory seabird, the herring gull (Larus argentatus). Stable nitrogen isotopes and fatty acids are used to define diet composition and to determine how diet is affected by ecosystem processes and change. The use of these tracers in concert leads to a better understanding of pathways of energy flow in food webs"--Abstract.

Lien permanent pour cette publication :

Renseignements sur la publication
Ministère/Organisme Canada. Environment Canada.
Canada Centre for Inland Waters.
National Water Research Institute (Canada)
Titre Ecological tracers can quantify food web structure and change / Craig E. Hebert, Michael T. Arts, D.V. Chip Weseloh.
Titre de la série NWRI contribution ; 05-187
Type de publication Série - Voir l'enregistrement principal
Langue [Anglais]
Format Électronique
Document électronique
Note(s) Title from cover.
Digitized edition from print [produced by Environment and Climate Change Canada].
Includes bibliographical references.
Includes abstract and summary in English and French.
Information sur la publication Burlington, Ontario, Canada : National Water Research Institute, Environment Canada, Canada Centre for Inland Waters, [2005]
Auteur / Contributeur Hebert, Craig E., author.
Arts, Michael Theodore, 1958- author.
Weseloh, D. Vaughn, author.
Description 1 online resource (27 pages) : maps, graphs.
Numéro de catalogue
  • En13-5/05-187E-PDF
Descripteurs Food supply
Environmental management
Aquatic birds
Demander des formats alternatifs
Pour demander une publication dans un format alternatif, remplissez le formulaire électronique des publications du gouvernement du Canada. Utilisez le champ du formulaire «question ou commentaire» pour spécifier la publication demandée.
Date de modification :