Vinecology: A partnership to better understand the ecology of vineyards and surrounding working landscapes

Working landscapes are critical for our long-term protection of biodiversity and ecosystem services.  In Mediterranean regions, vineyard dominated landscapes pose an emerging challenge for ecologists and viticulturalists alike. The development of vineyards in Californiaincreased from 120,000 to...

Restoring floodplains and riparian forest: Lessons from the Cosumnes River

Naturally-functioning floodplains provide a variety of ecosystem services, including habitat for diverse species.  California’s rivers are highly altered, with levees that disconnect floodplains, dams that alter flows, and land use practices that have destroyed most than 90  percent of riparian...

Comparative Analyses of Ecological Integrity Indices as Applied to Waters of the Mokelumne River Watershed

Freshwater resources and ecosystems are globally impaired by human activities and acutely
stressed throughout California, including the rivers and streams of the Sierra Nevada. We
assessed the condition of the Mokelumne River, a representative watershed located in the
central...

Productivity alters the scale dependence of the diversity-invasibility relationship

At small scales, areas with high native diversity are often resistant to invasion, while at large scales, areas with more native species harbor more exotic species, suggesting that different processes control the relationship between native and exotic species diversity at different spatial...

Human Impacts, Plant Invasion, and Imperiled Plant Species in California

Invasive species are one of the fastest growing conservation problems. These species homogenize the world's flora and fauna, threaten rare and endemic species, and impose large economic costs. Here, we examine the distribution of 834 of the more than 1000 exotic plant taxa that have become...

Invasion in a Diversity Hotspot: Exotic Cover and Native Richness in the Californian Serpentine Flora

Exotic species have been observed to be more prevalent in sites where the richness of native species is highest, possibly reflecting variation among sites in resources, propagule supply, heterogeneity, or disturbance. However, such a pattern leaves unclear whether natives at species-rich sites...

CalJep: A Spatial Distribution Database of CalFlora and Jepson Plant Species

CalJep is a spatially enabled database that reconciles or cross-walks the two prominent electronic plant distribution lists for California: CalFlora and Jepson. We intersected the distribution information from the two data sources to create a refined spatial distribution repository that can be...

Regional and local species richness in an insular environment: serpentine plants in California

We asked how the richness of the specialized (endemic) flora of serpentine rock outcrops in California varies at both the regional and local scales. Our study had two goals: first, to test whether endemic richness is affected by spatial habitat structure (e.g., regional serpentine area, local...

Biotic homogenization of the California flora in urban and urbanizing regions

Biotic homogenization, driven by native species losses and invasive species gains was investigated for the flora of California. Data from a variety of available databases were aggregated at the county level to examine patterns in county population density and growth in relation to floristic...

Beta diversity and the scale‐dependence of the productivity‐diversity relationship: a test in the Californian serpentine flora

  • The relationship of productivity to species diversity is usually positive at regional scales, but is often neutral, unimodal or negative at local spatial scales. Recent studies have pointed out that beta diversity, or among-locality and within-region variation in species composition, must
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