Skip to main content

Logging-induced variations in dissolved organic carbon affect yellow perch (Perca flavescens) recruitment in Canadian Shield lakes

Buy Article:

$50.00 plus tax (Refund Policy)

Abstract:

There is increasing interest in the effects of allochthonous carbon on lake food webs. By temporarily increasing levels of dissolved organic carbon (DOC) in lakes, logging can help us understand how carbon from the watershed could affect lake biota. The goals of this study were to determine whether (i) logging has a significant effect on the abundance of young-of-the-year (YOY) yellow perch (Perca flavescens) in Canadian Shield lakes and (ii) any changes in yellow perch recruitment could be related to increases in nutrients (N and P) and (or) DOC following logging. To do this, we examined 22 Canadian Shield lakes: the watersheds of 13 were not impacted, while 9 underwent logging (1%–78% of the watershed area). We found that the relative abundance of YOY yellow perch increased after logging in proportion to the ratio between the area of the logged watershed and the lake volume. We show that this effect is likely explained by an increase in DOC following logging. This might be related to (i) an increase in secondary productivity due to a positive effect of terrestrial carbon on the microbial loop and (or) (ii) an increased hatching success and (or) larval survival due to a greater protection from UV radiation by DOC.

Les effets du carbone allochtone sur les réseaux trophiques lacustres font l'objet d'un intérêt grandissant. En augmentant les niveaux du carbone organique dissous (COD) dans les lacs, les coupes forestières peuvent servir de modèle pour comprendre comment le carbone provenant du bassin versant peut affecter le compartiment biotique des lacs. Les objectifs de cette étude étaient de déterminer (i) si les coupes forestières ont un effet significatif sur l'abondance des jeunes perchaudes (Perca flavescens) de l'année (YOY) dans les lacs du bouclier canadien et (ii) si d'éventuels changements dans le recrutement de la perchaude peuvent être mis en relation avec l'augmentation des éléments nutritifs (N et P) et (ou) de COD suite aux coupes forestières. Nous avons échantillonné 22 lacs du bouclier canadien, dont 13 n'avaient subi aucune perturbation et 9 avaient subi des coupes forestières dans leur bassin versant (1–78 % de la superficie du bassin). L'abondance relative des jeunes perchaudes a augmenté suite aux coupes forestières, proportionnellement au rapport entre la superficie du bassin affecté par les coupes et le volume du lac. Nous montrons que cet effet est probablement expliqué par une augmentation du COD suite aux coupes forestières. Ceci pourrait être en relation avec (i) une augmentation de la productivité secondaire due à un effet positif du carbone d'origine terrestre dans la boucle microbienne et (ou) (ii) à une augmentation du succès de l'éclosion et (ou) de la survie larvaire due à une protection accrue contre les rayons UV par le COD.

Document Type: Research Article

Publication date: February 1, 2007

More about this publication?
  • Published continuously since 1901 (under various titles), this monthly journal is the primary publishing vehicle for the multidisciplinary field of aquatic sciences. It publishes perspectives (syntheses, critiques, and re-evaluations), discussions (comments and replies), articles, and rapid communications, relating to current research on cells, organisms, populations, ecosystems, or processes that affect aquatic systems. The journal seeks to amplify, modify, question, or redirect accumulated knowledge in the field of fisheries and aquatic science. Occasional supplements are dedicated to single topics or to proceedings of international symposia.
  • Information for Authors
  • Submit a Paper
  • Subscribe to this Title
  • Terms & Conditions
  • Sample Issue
  • Reprints & Permissions
  • ingentaconnect is not responsible for the content or availability of external websites
nrc/cjfas/2007/00000064/00000002/art00001
dcterms_title,dcterms_description,pub_keyword
6
5
20
40
5

Access Key

Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content
Cookie Policy
X
Cookie Policy
ingentaconnect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more