University of New Brunswick

About: University of New Brunswick is a education organization based out in Fredericton, New Brunswick, Canada. It is known for research contribution in the topics: Population & Context (language use). The organization has 10498 authors who have published 20654 publications receiving 474448 citations.

Future Spruce Budworm Outbreak May Create a Carbon Source in Eastern Canadian Forests

Abstract: Spruce budworm (Choristoneura fumiferana Clem.) is an important and recurrent disturbance throughout spruce (Picea sp.) and balsam fir (Abies balsamea L.) dominated forests of North America. Forest carbon (C) dynamics in these ecosystems are affected during insect outbreaks because millions of square kilometers of forest suffer growth loss and mortality. We tested the hypothesis that a spruce budworm outbreak similar to those in the past could switch a forest from a C sink to a source in the near future. We used a model of ecosystem C to integrate past spruce budworm impact sequences with current forest management data on 106,000 km2 of forest in eastern Quebec. Spruce budworm-caused mortality decreased stand-level merchantable C stocks by 11–90% and decreased ecosystem C stocks by 2–10% by the end of the simulation. For the first 13 years (2011–2024), adding spruce budworm significantly reduced ecosystem C stock change for the landscape from a sink (4.6 ± 2.7 g C m−2 y−1 in 2018) to a source (−16.8 ± 3.0 g C m−2 y−1 in 2018). This result was mostly due to reduced net primary production. The ecosystem stock change was reduced on average by 2 Tg C y−1 for the entire simulated area. This study provides the first estimate that spruce budworm can significantly affect the C sink or source status of a large landscape. These results indicate that reducing spruce budworm impacts on timber may also provide an opportunity to mitigate a C source.

Intrusion: The Central Problem for Family Health Promotion among Children and Single Mothers after Leaving an Abusive Partner

Abstract: Like other single-parent families, those consisting of mothers and their children who leave abusive partners/fathers are broadly viewed as deficient, high-risk structures in which children are susceptible to multiple problems. The mechanisms of strength and vulnerability in these families are poorly understood, and, consequently, their health promotion processes remain virtually unexplored. In a feminist grounded theory study of health promotion processes of single-parent families after leaving abusive partners/fathers, the authors discovered intrusion to be the basic social problem as families strive to promote health in the aftermath of abuse. The authors discuss the complex nature of intrusion, demonstrating how health is socially determined, and the challenges of health promotion in terms of the issues and dilemmas faced by study families and consider implications for health promotion knowledge and practice.