John F. Organ

Adaptive Impact Management: An Integrative Approach to Wildlife Management

Wildlife professionals need better ways to integrate ecological and human dimensions of wildlife management. A focus on impacts, guided by a structured decision process, will orient wildlife management toward rigorous, integrative decision making. Impacts are important socially defined effects of events and interactions related to wildlife that merit management. To manage impacts we propose adaptive impact management (AIM). This approach has seven primary components: situational analysis, objective setting, development of system model(s), identification and selection of management alternatives, actual management interventions, monitoring, and refinement of models and eventually interventions. Adaptive impact management builds upon strengths of systems thinking and conventional adaptive management, yet differs in that fundamental objectives of management are impacts on society, rather than conditions of a wildlife population or habitat. Emphasis is placed on stakeholder involvement in management and shared learning among scientists, managers, and stakeholders. We describe and assess adaptive impact management with respect to black bear management in New York.

A conservation institution for the 21st century: implications for state wildlife agencies.

Abstract The wildlife conservation institution (Institution) needs to reform to maintain legitimacy and relevancy in the 21st century. Institutional reform is inherently slow. Limitations resulting from historical and resource dependencies between state wildlife agencies and hunters have left the Institution poorly positioned to meet changing ecological and social complexities. In this paper, we suggest that an ideal Institution would have the following 4 components: broad-based funding, trustee-based governance, multidisciplinary science as the basis of recommendations from professional staff, and involvement of diverse stakeholders and partners. Our suggestions reflect the fundamental tenets of the Public Trust Doctrine, which we believe is the foundation of the Institution. In bringing forth these ideas, we hope to encourage discussion about how the Institution should reform to meet the changing needs of society.

Integrating Ecological and Human Dimensions in Adaptive Management of Wildlife-Related Impacts

Abstract Adaptive wildlife management seeks to improve the integration of science and management by focusing decision-making on hypothesis-testing and structuring management actions as field experiments. Since the early 1990s, adaptive resource management (ARM) has advocated enhancing scientific rigor in evaluating management actions chosen to achieve “enabling objectives” typically directed at wildlife habitat or population characteristics. More recently, the concept of adaptive impact management (AIM) has emphasized a need to articulate “fundamental objectives” in terms of wildlife-related impacts to be managed. Adaptive impact management seeks to clarify why management is undertaken in a particular situation. Understanding the “why” question is viewed in AIM as a prerequisite for establishing enabling objectives, whether related to changes in wildlife habitats and populations or to human beliefs and behaviors. This article describes practical aspects of AIM by exploring relationships between AIM and ARM within a comprehensive model of decision-making for wildlife management. Adaptive impact management clarifies and differentiates fundamental objectives (i.e., wildlife-related impacts to be modified) and enabling objectives (i.e., conditions that affect levels of impacts), whereas ARM reduces uncertainty about how to achieve enabling objectives and seeks an optimal management alternative through hypothesis-testing. The 2 concepts make different contributions to development of management hypotheses about alternative actions and policies and should be nested for optimal application to comprehensive wildlife management. Considered in the context of the entire management process, AIM and ARM are complementary ideas contributing to adaptive wildlife management.

Spatial Ecology of a Canada Lynx Population in Northern Maine

Abstract Canada lynx (Lynx canadensis) were listed as a federally threatened species in 14 states at the southern extent of their geographic range in March 2000, with Maine being the only state in the northeastern United States known to support a resident population. Relatively little information is known about the ecology of lynx living at the southern edge of their range, including range requirements, movements, and spatial organization. Basic knowledge of lynx ecology is needed for federal recovery planning efforts. Between 1999 and 2004, we trapped and radiocollared 43 lynx (21 M, 22 F) in northern Maine in an intensively managed and predominantly early successional forested landscape. We estimated diurnal annual and seasonal home-range size for male and female lynx using the 85% fixed-kernel home-range estimator. Annual home ranges of adult male lynx (x̄ = 53.6 km2) were more than twice the size of adult female home ranges (x̄ = 25.7 km2). Home ranges of adult females during snow periods (x̄ = 38.3 km2) were nearly 3 times larger than their snow-free-period ranges (x̄ = 14.3 km2), whereas, snow-free ranges of adult males (x̄ = 58.8 km2) were slightly larger than their snow-period ranges (x̄ = 45.2 km2). We observed a limited amount of home-range overlap among lynx of the same sex (F: x̄ = 17.2%; M: x̄ = 11.8%). Lynx of opposite sex showed more extensive overlap (x̄ = 24.3%). Most home-range shifts of resident lynx were typically not extensive. Based on territory mapping, we estimated a minimum lynx density of 9.2–13.0 lynx/100 km2. We observed lynx spatial ecology and densities that were more similar to northern lynx populations when hares were abundant than to other southern lynx populations, suggesting that region-specific studies under varying habitat conditions and hare densities are needed to ensure realistic recovery goals and effective management of lynx at the southern extent of their range.

Experiences with Beaver Damage and Attitudes of Massachusetts Residents Toward Beaver

Abstract As stakeholder attitudes, values, and management preferences become increasingly diverse, managing human–wildlife conflicts will become more difficult. This challenge is especially evident in Massachusetts, USA, where furbearer management has been constrained by passage of a ballot initiative that outlawed use of foothold and body-gripping traps except in specific instances involving threats to human health or safety. Without regulated trapping, beaver (Castor canadensis) populations and damage attributed to them have increased. To develop an understanding of public attitudes regarding beaver-related management issues, we surveyed a random sample of Massachusetts residents in the spring of 2002 within 3 geographic regions where beaver are prevalent, as well as all individuals who submitted a beaver-related complaint to the Massachusetts Division of Fisheries and Wildlife in 1999 and 2000. We found that respondents held generally positive attitudes toward beaver. Respondents who experienced beaver-related problems tended to have less favorable or negative attitudes toward beaver than people who did not experience beaver damage. Attitudes toward beaver became increasingly negative as the severity of damage experienced by people increased. We believe continued public support for wildlife conservation will require implementation of strategies that are responsive to changing attitudes of an urban population and within social-acceptance and biological carrying capacities.

Diurnal Habitat Relationships of Canada Lynx in an Intensively Managed Private Forest Landscape in Northern Maine

Abstract In March 2000, Canada lynx (Lynx canadensis) were listed as a federally threatened species in 14 states at the southern periphery of their range, where lynx habitat is disjunct and snowshoe hare (Lepus americanus) densities are low. Forest conditions vary across lynx range; thus, region-specific data on the habitat requirements of lynx are needed. We studied lynx in northern Maine, USA, from 1999 to 2004 to assess quality and potential for forests in Maine to sustain lynx populations. We trapped and radiocollared 43 lynx (21 M, 22 F) during this period and evaluated diurnal habitat selection by 16 resident adult lynx (9 M, 7 F) monitored in 2002. We evaluated lynx selection of 8 habitats at multiple spatial scales, and related lynx habitat selection to snowshoe hare abundance. Lynx preferred conifer-dominated sapling stands, which supported the highest hare densities on our study site (x̄ = 2.4 hares/ha), over all other habitats. The habitats where lynx placed their home ranges did not differ by sex. However, within their home ranges, males not only preferred conifer-dominated sapling stands, but also preferred mature conifer, whereas females singularly preferred conifer-dominated sapling stands. Approximately one-third of Maines spruce–fir forest and nearly 50% of our study area was regenerating conifer or mixed-sapling forest, resulting from a disease event and intensive forest management (e.g., large clear-cuts). Our findings suggest that current habitat conditions in Maine are better than western montane regions and approach conditions in boreal forests during periods of hare abundance. We recommend that forest landowners maintain a mosaic of different-aged conifer stands to ensure a component of regenerating conifer-dominated forest on the landscape.

Wildlife Stakeholder Acceptance Capacity for black bears, beavers, and other beasts in the east

Abstract The formal concept of wildlife stakeholder acceptance capacity (WSAC) in wildlife management is less than a generation old. The genesis of wildlife management in North America occurred during a time when populations of many wildlife species were low, their habitats were altered and degraded, and the human population was rapidly urbanizing. The focus of wildlife management was to restore wildlife populations and habitats. Once restored, wildlife managers strove to maintain populations at levels within biological carrying capacities (BCC) and provide benefits to a relatively narrow range of stakeholders. In recent years, cultural changes associated with a predominantly suburban society have led to conflicts with traditional wildlife management approaches and broadened the stakeholder base. Wildlife managers have had to consider the interests of a wider stakeholder base that supports a diversity of often conflicting expectations, while relying on traditional funding sources. For certain species, management for WSAC has taken priority over management for BCC. This scenario is particularly focused in the northeast United States where human population densities are some of the highest in the nation. We explore the current state of our knowledge of WSAC for certain species in the east, and review the tools being used for monitoring and assessment. We discuss adequacy of these approaches and offer suggestions for incorporating WSAC into wildlife management planning and operations. We consider the implications of WSAC to the future of wildlife management in North America.

Within-Stand Selection of Canada Lynx Natal Dens in Northwest Maine, USA

Abstract Canada lynx (Lynx canadensis) were listed as threatened in the contiguous United States under the Endangered Species Act in March 2000. Little information on lynx ecology at the southern extent of their range was available at the time of listing, and no ecological studies had been conducted in the eastern USA. Between 1999 and 2004, we investigated habitat selection at natal dens in northern Maine to address questions on the importance of forest conditions to denning requirements. We compared within-stand characteristics of 26 den sites to general characteristics of the stands containing dens. We used logistic regression to identify components within stands that distinguished natal dens from the residual stand and used the information-theoretic approach to select models that best explained lynx den-site selection. The top-ranked model had 2 variables: tip-up mounds of blown-down trees and visual obscurity at 5 m from the den (wi = 0.92). Within-stand structure was useful for predicting lynx den-site selection in managed forests in Maine and suitable denning habitat did not appear to be limiting.

Public Trust Principles and Trust Administration Functions in the North American Model of Wildlife Conservation: Contributions of Human Dimensions Research

The public trust doctrine (PTD) is the common law basis for governments to hold wildlife in trust for the benefit of current and future generations of Americans. Wildlife as a public trust resource is the foundation of the North American Model of Wildlife Conservation. We examine principles that underlie a trustee’s role in the context of the PTD and governmental responsibility. We evaluate purposes of and needs for human dimensions inquiry in execution of a trustee’s wildlife stewardship responsibility. We conclude human dimensions research is essential for government to fulfill its responsibilities as trustee, particularly considering the breadth and often conflicting interests of stakeholders. Human dimensions research can serve an important function in identifying and affirming core societal values toward wildlife that underpin the PTD and in monitoring shifts in society’s values to ensure resiliency of the trustee role and relevance and legitimacy of institutional norms of wildlife resource governance.

Trapping and furbearer management in North American wildlife conservation

Furbearer Management in North America maintains wild furbearer populations at sustainably harvestable, scientifically determined and socially acceptable levels. Furbearer management impacts numerous wildlife populations and habitats, and human health, safety and property. Achieving balance in the management of furbearers is not always an easy task partly because regulated trapping, a controversial management technique, plays a critical role in this balance. Steps have been taken by wildlife professionals to improve the humaneness of trapping through the development of international standards used to evaluate traps. These efforts will ideally preserve trapping and the many roles it plays in furbearer management and wildlife management in general.