Status of Knowledge Synthesis for Desert Habitat Restoration and Post-Fire Rehabilitation

Status of Knowledge Synthesis for Desert Habitat Restoration and Post-Fire Rehabilitation

Supported by the Clark County (Nevada) Desert Conservation Program and the California Fire Science Consortium, we completed a status of knowledge synthesis of restoration practices aimed at enhancing recovery of damaged habitats in the Mojave and western Sonoran Desert, some of the driest locations in North America.

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Long-Term Change in Desert Annuals during Restoration, Joshua Tree National Park

Long-Term Change in Desert Annuals during Restoration, Joshua Tree National Park

It is not well understood whether desert plantings can facilitate recruitment of other natives (or mainly just non-natives), or whether facilitation changes through time as a restoration site matures. To address these uncertainties, we partnered with the National Park Service to study plant community change below planted perennials and in interspaces (areas between perennials) during 12 years (2009-2020) in Joshua Tree National Park, California, in the southern Mojave Desert.

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Techniques for restoring damaged Mojave and western Sonoran habitats, including those for threatened desert tortoises and Joshua trees.

Techniques for restoring damaged Mojave and western Sonoran habitats, including those for threatened desert tortoises and Joshua trees.

Abella, S.R., K.H. Berry, and S. Ferrazzano. 2023. Techniques for restoring damaged Mojave and western Sonoran habitats, including those for threatened desert tortoises and Joshua trees. Desert Plants 38:4-52.

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Bet-Hedging Desert Restoration Practices during Drought: Research Brief

Bet-Hedging Desert Restoration Practices during Drought: Research Brief

This brief compares the restoration treatments of outplanting and two abiotic treatments on disturbed sites in the Sonoran Desert of southeastern California. Overall results suggest that multiple treatment types, including abiotic treatments, can be implemented as a bet-hedging approach to achieve restoration benefits even if some treatments may fail.

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Field Guide for Estimating Desert Invasive Grass Fuel: Research Brief

Field Guide for Estimating Desert Invasive Grass Fuel: Research Brief

The objective of this study was to assess feasibility of developing regression equations using a fast, non-destructive measure (cover) to estimate aboveground biomass for red brome, a widespread non-native annual grass in the Mojave Desert.

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Treatments and Planting Location Affect Post-Burn Restoration: Research Brief

Treatments and Planting Location Affect Post-Burn Restoration: Research Brief

On a burned site in the northeastern Mojave Desert that is conservation-priority habitat for federally listed desert tortoises, a field experiment was conducted to test different treatments for outplanting greenhouse-propagated seedlings of the native perennial brittlebush (Encelia virginensis).

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Reducing Fuel while Protecting Soil Biocrusts: Research Brief

Reducing Fuel while Protecting Soil Biocrusts: Research Brief

Non-native annual grasses, such as red brome (Bromus rubens), have increased the amount and continuity of fine fuels in drylands of the southwestern U.S. Where herbicide is not allowed or may have undesirable non-target effects, one of the alternative treatments that has been proposed and used in more mesic habitats is carbon addition.

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Facilitating Natural Recruitment for Desert Revegetation: Research Brief

Facilitating Natural Recruitment for Desert Revegetation: Research Brief

Assisted natural regeneration (ANR) is an alternative aimed at encouraging site conditions favorable for natural regeneration through actions such as alleviating limitations on viable seed production, germination, and seedling survival. Two ANR approaches were tested on the Mojave Desert foundation species, the creosote bush.

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Long-Term Change in Mojave Desert Vegetation during 37 Years of Climatic and Land-Use Dynamics: Research Brief

Long-Term Change in Mojave Desert Vegetation during 37 Years of Climatic and Land-Use Dynamics: Research Brief

A recent study in press with Ecological Monographs collected and analyzed a long-term data set of fluctuations in perennial plant communities in the eastern Mojave Desert. During the 37-year period, most measures of the native perennial plant community changed temporally.

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Non-Native Plants, Fuels, and Desert Revegetation: Research Brief

Non-Native Plants, Fuels, and Desert Revegetation: Research Brief

To revegetate disturbed desert lands, practitioners often reestablish fertile islands as a first step in restoring native plants and associated fauna on disturbed desert sites. This research brief discusses the pros and cons of this approach considering native and non-native species.

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Modeling Desert Shrubland Changes with an Invasive Grass Introduction and Climate Change: Research Brief

Modeling Desert Shrubland Changes with an Invasive Grass Introduction and Climate Change: Research Brief

For desert shrubland species that have evolved without fire, the introduction of a grass-fire, positive feedback cycle is particularly problematic. This brief discusses work done by researchers who modeled the grass-fire cycle for non-fire-adapted desert shrublands under three sets of climate conditions.

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Increasing Fire Activity for Arid California: Different Fire Trends from Different Fire Drivers: Research Brief

Increasing Fire Activity for Arid California: Different Fire Trends from Different Fire Drivers: Research Brief

Study results from arid regions in Southern California show how fire trends differ based on unique sets of circumstances. This brief discuses how combinations of direct drivers (like powerline and roadside ignitions),  indirect drivers (like invasive grasses, air pollution, and landscape fragmentation terrestrial intactness) and unknown factors cause diversity in fire trends.

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Synthesizing Best-Management Practices for Desert Tortoise Habitats: Research Brief

Synthesizing Best-Management Practices for Desert Tortoise Habitats: Research Brief

In a collaborative project funded by the non-profit Desert Tortoise Council with Natural Resource Conservation LLC, the authors synthesized published literature and practitioner’s experiences to develop best-management practices for habitats of desert tortoises. 

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Restoring Desert Biocrusts after Severe Disturbances: Research Brief

Restoring Desert Biocrusts after Severe Disturbances: Research Brief

Collaboratively with the National Park Service, the authors performed a study along Northshore Road in Lake Mead National Recreation Area (eastern Mojave Desert, Nevada) to develop biocrust restoration strategies. Results and management recommendations for the most effective restoration methods are discussed. 

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