Expert Knowledge Survey: Invasive Forest Pathogens in North America

Project Overview

Scope: Assessment of “known knowns” (i.e., incomplete information) to help calibrate efforts to reduce risk uncertainty for non-established pests and predict pest impact. The purpose of Part 2 of the survey is to use expert information to fill the gap, with your help. We have selected the participants in this survey carefully from researchers and practitioners in pathology, silviculture, and genetics from across North America. Future surveys will target international expertise on nonestablished pests.Please follow a link to your expertise area to begin the survey.

Overall Goal: Collect preliminary information on social and ecological impacts to seed a discussion of a multidimensional risk assessment system (Part 2 of the survey, see below).

Links to Pathogen Groups

Abstract

Invasive pathogens cause serious disruption to forest systems in North America. There are opportunities for both mitigation, and engagement with stakeholders at every stage of the invasion curve from pre-introduction, to establishment, to outbreak. As a proactive approach, risk assessment is the earliest opportunity to engage to ensure there are relationships in place with stakeholders to ensure meaningful and effective mitigation of impacts. The prediction and mitigation of impacts are limited by the “training set” of known impacts of established, invasive organisms; and complicated by the question of how to assess impacts while accounting for the functionally diverse ecological and social dimensions of forest systems and values people place on them, which are not currently captured by risk assessment frameworks. Furthermore, various communities of practice (e.g., basic research, monitoring, management, biosecurity, extension, production vs. conservation, etc.) focus efforts on specific types pests (i.e., oomycetes, insects, fungi), forest systems (i.e., pines, hardwoods), and stages in the invasion process. The long-term aim, of which this survey is a preliminary part (and accompanying workshop) is to build a framework to strategize how embed stakeholders and practitioners into a common network to ensure that relationships are in place for collaborative prioritization of pests in risk assessment based on diverse value systems and impacts.

We have identified two critical areas where we can reduce uncertainy for invasive pests already in North America.

  1. Crowdsource/peer-review an annotated, comprehensive list of established non-native forest pathogens based on best information available on their origins, impacts, and host ranges

  2. Scientific consensus on the relative impacts (ie. critical vs. high-priority vs. benign) that each invasive species has had will facilitate broader consensus on prioritization of established and future threats

Survey Directions

Consider and contribute to a “working” list of invasive forest pathogens in North America, along with relevant information on biology, invasion history and status, and hosts and forests impacted/threatened, and apply a preliminary framework to assess: a) impacts to date, and b) expected impacts in the future. **by subject area expert; preliminary responses will be collected through an online survey app.

Suggested examples of types of impacts

Social

(social sciences “hat”)

Species

(organismal biology “hat”)

Community

(ecologist “hat”)

Ecosystem functioning and services

(environmental science “hat”)

 

Economic (specify)

Lifeways

Non-timber

Markets

Management costs

Provisioning

Cultural or intrinsic
(e.g., recreation, redwoods, etc.)

Near-extinction

Productivity (growth)

Reproduction

Range contractions/local extirpation

Decline

Susceptibility to other stressors (biotic or abiotic)

Plant diversity

Overall biodiversity (general or examples)

Short-term perturbation

Shifts in forest type

Structure

Composition

Nutrient cycling

Erosion

Hydrology
(e.g, runoff, retention, etc.)

Carbon

Heat

Soil insolation

Links to Pathogen Groups