Landscape connectivity

The Nature Conservancy’s Resilient & Connected Landscapes (RCL) project created a comprehensive map of resilient lands and significant climate corridors across the bioregions that make up the contiguous 48 states. RCL is a conservation blueprint that aims to ‘conserve the stage’ by highlighting areas with high abiotic diversity and connectivity. It identifies the set of diverse and connected places that, if conserved, will ensure a high level of biodiversity and healthy ecosystem processes in a changing climate. RCL includes a connectedness metric from CAPS (Conservation Assessment & Prioritization System)/DSL (Designing Sustainable Landscapes) and combines it with an analysis that highlights areas with high landscape diversity.

The focus of RCL is not on conserving ecosystems as they exist today, but to ensure that future ecosystems, perhaps novel ecosystems, will include a diversity of niches, and thereby support a high level of biodiversity. The Resilient Areas prioritized by RCL may not always be large, contiguous blocks of undeveloped land, but will generally have high landscape complexity combined with high interconnectivity. RCL also identifies areas of Flow, the predicted movement of species’ populations over time in response to climate change. Climate Corridors are narrow zones of highly concentrated flow, often riparian corridors or ridgelines. Climate Flow Zones are broad areas of high flow that are less concentrated than the corridors, and typically occur in what are now, intact forested regions.

RCL includes two conservation designs (plans): Resilient and Connected Landscapes, and Prioritized Resilient and Connected Landscapes. In addition, assessment data (Resilient Sites, Regional Flow, and Amount of Carbon Storage) are available for use in the development of conservation plans for specific interests or geographic areas.

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Nature’s Network is a collaborative effort led by the U.S. Fish & Wildlife Service and representatives from all 13 Northeast states, using innovative modeling approaches developed by UMass Amherst and other science partners, to identify the best opportunities for conserving and connecting intact habitats and ecosystems and supporting imperiled species, to help ensure the future of fish and wildlife across the Northeast region. Nature’s Network offers a regional landscape conservation design and a suite of decision-support tools that makes available much of the state-of-the-art modeling done by the Designing Sustainable Landscapes (DSL) project at UMass Amherst. The web mapper interface presents a huge variety of customizing options, that frequent users will familiarise themselves with and use. Nature’s Network incorporates, DSL Ecological Integrity Metrics, DSL-Conductance, and Resilient & Connected Landscapes. Elements of Nature’s Network include:

• Terrestrial and Wetland Core Network: Intact, well-connected places that, if protected, will support a diversity of fish, wildlife, and plants, and the ecosystems they depend upon. Core areas are linked together by a network of connectors designed to enable the movement of animals and plants between core areas and across the landscape into the future.
• Habitats for Imperiled Species: This contains three datasets: Habitat Importance for Imperiled Species, Core Habitat for Imperiled Species, and Habitat Condition for Imperiled Species.
• Aquatic Core Networks: This includes three data layers: River and stream (lotic) core network, Lake and pond (lentic) core network, and Aquatic buffers.
• Marsh Migration Zones: This dataset depicts potential salt marsh migration zones at various sea level rise scenarios from 0-6 feet. Identification of suitable uplands adjacent to tidal wetlands is based on topography, habitat type, land use, and development, and can be used for facilitating marsh migration through land protection and/or management.
• Regional Flow: This dataset, developed by The Nature Conservancy, identifies where population movements and potential range shifts may become concentrated or where they are well dispersed, and it is possible to quantify the importance of an area by measuring how much flow passes through it, and how concentrated that flow is. The results can be used to identify important pinch points where movements are predicted to concentrate, or diffuse intact areas that allow for more random movements.

Some elements of Nature’s Network, such as the Terrestrial and Wetland Core Network, represent a regional plan for conserving wetland and terrestrial biodiversity. Other components, such as Habitats for Imperiled Species and Marsh Migration Zones, can be used as inputs for creating conservation plans at the local, state or regional scales.

The developers have compiled testimonials from Nature's Network users.

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The purpose of the Massachusetts Climate Action Tool (CAT) is to present research-based information about climate change impacts and the vulnerabilities of various fish, wildlife and habitat, and promote adaptation actions that can be taken at a local level. This information is paired with a map viewer to access online GIS data that was selected or synthesized to understand and respond to conservation challenges posed by climate change. The tool contains approximately 200 GIS layers as well as a wealth of information on climate-related stressors affecting Massachusetts, vulnerability assessments for over 60 species or groups of species, and a substantial list of adaptation actions ranging from forest management and land preservation to culvert replacement and dam removal.

The CAT was designed for users with limited mapping capacity, and features maps that incorporate BioMap2 and the CAPS (Conservation Assessment & Prioritization System) Index of Ecological Integrity (IEI), DSL (Designing Sustainable Landscapes) Conductance, as well as other spatial data. Species profiles include spatial data showing the current geographic distribution or habitat suitability for the species and, in many cases, projections for the future habitat suitability accounting for climate change. Spatial data can be explored using a web browser, but cannot be uploaded to or downloaded from the spatial data viewer, which includes links to data sources and additional information.

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Mapping & Prioritizing Parcels for Resilience (MAPPR) allows land conservationists to identify the parcels within an area of interest that are the highest priorities for protection based on habitat quality, climate change resilience, water resource protection, parcel size and adjacency to existing protected parcels. MAPPR uses a variety of data sources to help prioritize parcels for conservation, including BioMap2, a precursor to Resilient & Connected Landscapes, and Critical Linkages Priorities (DSL-Conductance). There are four pre-calculated models, or a user can create a customized prioritization by selecting individual factors of importance.

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Beginning in 2000, the Landscape Ecology Lab at UMass Amherst has used landscape-scale modeling to produce data to support conservation decision-making. Since 2010, the lab has provided conservation planning data and products covering 13 states in the Northeast and Mid-Atlantic, in a project called Designing Sustainable Landscapes (DSL). The DSL approach follows a logical sequence from data generation and compilation, to assessment and modeling, to conservation design. DSL models provide much of the content of Connect the Connecticut, and Nature’s Network, both developed in collaboration with the U.S. Fish and Wildlife Service, state wildlife agencies, and conservation NGOs. DSL involves two major processes:

1. Characterization involves the compilation, correction, and generation of data for use in landscape modeling. Examples include the developed land uses, ecological communities, ecological settings variables, and climate data. These data are used as inputs for landscape assessments, although they can be useful on their own for conservation decision-making.

2. Assessment is the process of integrating data and using models to make landscape predictions. Examples include the use of CAPS (Conservation Assessment & Prioritization System) to assess the ecological integrity of ecological communities, an evaluation of regional connectivity, use of the SPRAWL model to assess risk of development, and the modeling of climate niche and landscape capability for representative wildlife species or species at risk. Incorporation of climate data into the models facilitates predictions of future ecological integrity, connectivity, landscape capability and potential habitat refugia.

The DSL data products likely to be most useful for land protection and stewardship are:

• Regional CAPS Index of Ecological Integrity (IEI)

• Conductance index (an measure of the importance of land for regional-scale connectivity)

• Integrated probability of development

• Focus species models

• Conservation design elements from Nature’s Network

Some of the DSL data has been clipped to state boundaries.

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BioMap2 is a conservation plan that uses both a species-based (fine-filter) and ecosystem/landscape-based (coarse-filter) approach that takes into account known occurrences of species of conservation concern and landscape analyses of habitat value and ecological integrity. It combines MassWildlife’s Natural Heritage & Endangered Species Program’s (NHESP) 30 years of rigorously documented rare species and natural community data with spatial data identifying wildlife species and habitats that were the focus of the Massachusetts Division of Fisheries & Wildlife’s 2005 State Wildlife Action Plan (SWAP). BioMap2 also integrates The Nature Conservancy’s assessment of large, well-connected, and intact ecosystems and landscapes across the Commonwealth, incorporating concepts of ecosystem resilience to address anticipated climate change impacts. The landscape analyses use customized versions of CAPS (Conservation Assessment & Prioritization System) assessments to identify vernal pool cores (clusters), forest cores, wetland cores, aquatic cores, and landscape blocks.

The BioMap2 product consists of two polygon-based datasets, one for Core Habitat and another for Critical Natural (Supporting) Landscape. Core Habitat identifies key areas to ensure the long-term persistence of rare species, other Species of Conservation Concern, and exemplary natural communities and intact ecosystems. Critical Natural Landscape identifies large natural landscape blocks that are minimally impacted by development, as well as buffers around some Core Habitats, both of which enhance resilience.

Although BioMap2 used many of the same data that were used to identify Priority Habitat by NHESP, the Priority Habitat maps were created for a regulatory purpose (Massachusetts Endangered Species Act), and BioMap2 is the preferred information source for conservation planning and action.

Learn more about the terms used in this tool profile from the Glossary.