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Friscia, A. R.

Publications and source records attributed to Friscia, A. R..

2 recordsLinked to original sources

Live-trapping of rodents in urban green spaces across Los Angeles

Urban green spaces have the potential to function as multi-benefit spaces, for both human enjoyment and sustaining native wildlife populations. In our study, we trapped for small nocturnal mammals across a series of Los Angeles green spaces. Our results show that native rodents are only present in habitats that support native vegetation; in particular we highlight the native rodent biodiversity on Sage Hill, a coastal sage scrub remnant on the UCLA campus. Other urban parks that are composed of non-native grasses and non-native shrubbery yielded only invasive species of rodents, including Brown Rats (Rattus norvegicus) and House Mice (Mus musculus). Our study points to the ability of renovated green space in Los Angeles to support native fauna. In addition, our study demonstrates some of the difficulties in doing trapping studies in heavily urbanized environments.

ecology↗

Hierarchy, Morphology, and Adaptive Radiation: a Test of Osborn’s Law in the Carnivora

AO_SCPLOWBSTRACTC_SCPLOWHenry Fairfield Osborns law of adaptive radiation was intended to explain the early proliferation of morphological and functional variation in diversifying clades. Yet, despite much theoretical development and empirical testing, questions remain regarding the taxonomic levels at which adaptive radiation occurs, the traits involved, and its frequency across the tree of life. Here, we evaluate support for this \"early burst\" model of adaptive radiation in 14 ecomorphological traits plus body mass for the extant mammalian order Carnivora. Strong support for an early burst adaptive radiation is recovered for molar grinding area, a key proxy for diet. However, we find no evidence for early burst-like dynamics in body mass or multivariate trait data, suggesting a decoupling of evolutionary modes among traits driven by dietary specialization. Furthermore, the signal of an early burst is only recovered for Carnivora, and not in family-level clades. The lack of support for the early burst model of morphological adaptive radiation in previous phylogenetic studies may be a consequence of focusing on the wrong traits at the wrong taxonomic levels. Osborns law predicted that adaptive radiation should be hierarchically structured, and the search for its signature and understanding of its prevalence will require a renewed focus on functional traits and their evolution over higher-level clades.

evolutionary biology↗