Mitigation, Adaptation, and the Threat to Biodiversity
Long-distance plant dispersal and habitat fragmentation: identifying conservation targets for spatial landscape planning under climate change
Climate change presents a potentially severe threat to biodiversity. Species will be required to disperse rapidly through fragmented landscapes in order to keep pace with the changing climate. An important challenge for conservation is therefore to manage landscapes so as to assist species in tracking the environmental conditions to which they are adapted. Here we develop a stochastic spatially explicit model to simulate plant dispersal across artificial fragmented landscapes. Based on certain assumptions as to the dispersal mechanism, we assess the impact that varying potential for rare long-distance dispersal (LDD) has on the ability to move over landscapes with differing spatial arrangements of suitable habitat (clumped versus fragmented). Simulations demonstrate how the relative importance of landscape structure in determining migration ability may decrease as the potential for LDD increases. Thus, if LDD is the principal mechanism by which rapid large-scale migrations are achieved, strategically planned networks of protected habitat may have a limited impact on rates of large-scale plant migrations. We relate our results to conventional principles for conservation planning and the geometric design of reserves, and demonstrate how reversal of these principles may maximise the potential for conservation under future climates. In particular, we caution against the justification of large-scale corridors on grounds of climate change since migration along corridors by standard dispersal mechanisms is unlikely to keep pace with projected change for many species. An improved understanding of the dispersal mechanisms by which species achieve rapid migrations, and the way that these processes are affected by patterns of landscape fragmentation, will be important to inform future conservation strategies.
Managing for Multiple Resources Under Climate Change: National Forests
This study explores potential adaptation approaches in planning and management that the United States Forest Service might adopt to help achieve its goals and objectives in the face of climate change. Availability of information, vulnerability of ecological and socio-economic systems, and uncertainties associated with climate change, as well as the interacting non-climatic changes, influence selection of the adaptation approach. Resource assessments are opportunities to develop strategic information that could be used to identify and link adaptation strategies across planning levels. Within a National Forest, planning must incorporate the opportunity to identify vulnerabilities to climate change as well as incorporate approaches that allow management adjustments as the effects of climate change become apparent. The nature of environmental variability, the inevitability of novelty and surprise, and the range of management objectives and situations across the National Forest System implies that no single approach will fit all situations. A toolbox of management options would include practices focused on forestalling climate change effects by building resistance and resilience into current ecosystems, and on managing for change by enabling plants, animals, and ecosystems to adapt to climate change. Better and more widespread implementation of already known practices that reduce the impact of existing stressors represents an important “no regrets” strategy. These management opportunities will require agency consideration of its adaptive capacity, and ways to overcome potential barriers to these adaptation options.
Implementing Climate Change Adaptation – Lessons Learned from Ten Examples
This paper presents ten examples of cities and counties around the country. Each highlights the key lessons learned in the process of moving from planning to implementation on climate adaptation. The purpose of this report is to inform and inspire other communities in their efforts to advance climate adaptation. We also hope this report will be useful to organizations dedicated to helping communities adapt to climate change.
Forest Adaptation Resources: Climate Change Tools and Approaches for Land Managers
The forests of northern Wisconsin, a defining feature of the region’s landscape, are expected to undergo numerous changes in response to the changing climate. This document provides a collection of resources designed to help forest managers incorporate climate change considerations into management and devise adaptation tactics. It was developed in northern Wisconsin as part of the Northwoods Climate Change Response Framework project and contains information from assessments, partnership efforts, workshops, and collaborative work between scientists and managers. The four interrelated chapters include: (1) a description of the overarching Climate Change Response Framework, a landscape-scale conservation approach also being expanded to other landscapes; (2) a “menu” of adaptation strategies and approaches that are directly relevant to forests in northern Wisconsin; (3) a workbook process to help incorporate climate change considerations into forest management planning and to assist land managers in developing groundlevel climate adaptation tactics for forest ecosystems; and (4) two illustrations that provide examples of how these resources can be used in real-world situations. The ideas, tools, and resources presented in the different chapters are intended to inform and support the existing decisionmaking processes of multiple organizations with diverse management goals.
Confronting Climate Change in the U.S. Northeast
Climate-Smart Conservation – Putting Adaptation Principles into Practice
Climate Consideration for Management of Natural Areas
Climate Change and Forests of the Future: Managing in the Face of Uncertainty
We offer a conceptual framework for managing forested ecosystems under an assumption that future environments will be different from present but that we cannot be certain about the specifics of change. We encourage flexible approaches that promote reversible and incremental steps, and that favor ongoing learning and capacity to modify direction as situations change. We suggest that no single solution fits all future challenges, especially in the context of changing climates, and that the best strategy is to mix different approaches for different situations. Resources managers will be challenged to integrate adaptation strategies (actions that help ecosystems accommodate changes adaptively) and mitigation strategies (actions that enable ecosystems to reduce anthropogenic influences on global climate) into overall plans. Adaptive strategies include resistance options (forestall impacts and protect highly valued resources), resilience options (improve the capacity of ecosystems to return to desired conditions after disturbance), and response options (facilitate transition of ecosystems from current to new conditions). Mitigation strategies include options to sequester carbon and reduce overall greenhouse gas emissions. Priority-setting approaches (e.g., triage), appropriate for rapidly changing conditions and for situations where needs are greater than available capacity to respond, will become increasingly important in the future.
