Publications
Below are publications associated with the Southwest Biological Science Center's research.
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Filter Total Items: 1338
Change detection using vegetation indices and multiplatform satellite imagery at multiple temporal and spatial scales
This chapter describes emerging methods for using satellite imagery across temporal and spatial scales using a case study approach to illustrate some of the opportunities now available for combining observations across scales. It explores the use of multiplatform sensor systems to characterize ecological change, as exemplified by efforts to scale the effects of a biocontrol insect (the leaf beetle
Authors
Edward P. Glenn, Pamela L. Nagler, Alfredo R. Huete
Transport of fine sediment over a coarse, immobile riverbed
Sediment transport in cobble-boulder rivers consists mostly of fine sediment moving over a coarse, immobile bed. Transport rate depends on several interrelated factors: boundary shear stress, the grain size and volume of fine sediment, and the configuration of fine sediment into interstitial deposits and bed forms. Existing models do not incorporate all of these factors. Approaches that partition
Authors
Paul E. Grams, Peter R. Wilcock
Litter quality versus soil microbial community controls over decomposition: a quantitative analysis
The possible effects of soil microbial community structure on organic matter decomposition rates have been widely acknowledged, but are poorly understood. Understanding these relationships is complicated by the fact that microbial community structure and function are likely to both affect and be affected by organic matter quality and chemistry, thus it is difficult to draw mechanistic conclusions
Authors
Cory C. Cleveland, Sasha C. Reed, Adrienne B. Keller, Diana R. Nemergut, Sean P. O'Neill, Rebecca Ostertag, Peter M. Vitousek
Graptemys pulchra Baur 1893: Alabama Map Turtle
The Alabama Map Turtle, Graptemys pulchra (Family Emydidae), is a moderately large riverine species endemic to the Mobile Bay drainage system of Alabama, Georgia, and Mississippi. Sexual size dimorphism is pronounced, with adult females (carapace length [CL] to 273 mm) attaining more than twice the size of adult males (CL to 117 mm). The species is an inhabitant of relatively large, swift creeks a
Authors
Jeffrey E. Lovich, James C. Godwin, C.J. McCoy
Managing invasive red-eared slider turtles in Japan
No abstract available.
Authors
Jeffrey E. Lovich
Reptilia: Testudines: Emydidae Graptemys gibbonsi - Pascagoula Map Turtle
The Pascagoula Map Turtle, Graptemys gibbonsi, is a large riverine species that exhibits pronounced sexual dimorphism, where females attain a maximum carapace length (CL) of 295 mm and males a maximum of 141 mm (Lovich et al. 2009). Mean adult female CL (248 mm) can be well over twice the mean CL of adult males (104 mm; Gibbons and Lovich 1990, Lovich et al. 2009). In addition, females have conspi
Authors
Jeffrey E. Lovich, Joshua R. Ennen
Development and characterization of 12 microsatellite markers for the Island Night Lizard (Xantusia riversiana), a threatened species endemic to the Channel Islands, California, USA
The Island Night Lizard is a federally threatened species endemic to the Channel Islands of California. Twelve microsatellite loci were developed for use in this species and screened in 197 individuals from across San Nicolas Island, California. The number of alleles per locus ranged from 6 to 21. Observed heterozygosities ranged from 0.520 to 0.843. These microsatellite loci will be used to inves
Authors
Ryan P. O'Donnell, Charles A. Drost, Karen E. Mock
Pedological and geological relationships with soil lichen and moss distribution in the eastern Mojave Desert, CA, USA
Biological soil crusts (biocrusts) are ubiquitous in drylands globally. Lichens and mosses are essential biocrust components and provide a variety of ecosystem services, making their conservation and management of interest. Accordingly, understanding what factors are correlated with their distribution is important to land managers. We hypothesized that cover would be related to geologic and pedolo
Authors
Jayne Belnap, David M. Miller, David R. Bedford, Susan L. Phillips
Disturbance to desert soil ecosystems contributes to dust-mediated impacts at regional scales
This review considers the regional scale of impacts arising from disturbance to desert soil ecosystems. Deserts occupy over one-third of the Earth’s terrestrial surface, and biological soil covers are critical to stabilization of desert soils. Disturbance to these can contribute to massive destabilization and mobilization of dust. This results in dust storms that are transported across inter-conti
Authors
Stephen B. Pointing, Jayne Belnap
Quantifying understorey vegetation in the US Lake States: a proposed framework to inform regional forest carbon stocks
The contribution of understorey vegetation (UVEG) to forest ecosystem biomass and carbon (C) across diverse forest types has, to date, eluded quantification at regional and national scales. Efforts to quantify UVEG C have been limited to field-intensive studies or broad-scale modelling approaches lacking field measurements. Although large-scale inventories of UVEG C are not common, species- and co
Authors
Matthew B. Russell, Anthony W. D'Amato, Bethany K. Schulz, Christopher W. Woodall, Grant M. Domke, John B. Bradford
Physically based method for measuring suspended-sediment concentration and grain size using multi-frequency arrays of acoustic-doppler profilers
As the result of a 12-year program of sediment-transport research and field testing on the Colorado River (6 stations in UT and AZ), Yampa River (2 stations in CO), Little Snake River (1 station in CO), Green River (1 station in CO and 2 stations in UT), and Rio Grande (2 stations in TX), we have developed a physically based method for measuring suspended-sediment concentration and grain size at 1
Authors
David J. Topping, Scott Wright, Ronald E. Griffiths, David Dean
The relation between invertebrate drift and two primary controls, discharge and benthic densities, in a large regulated river
1. Invertebrate drift is a fundamental process in streams and rivers. Studies from laboratory experiments and small streams have identified numerous extrinsic (e.g. discharge, light intensity, water quality) and intrinsic factors (invertebrate life stage, benthic density, behaviour) that govern invertebrate drift concentrations (# m−3), but the factors that govern invertebrate drift in larger rive
Authors
Theodore A. Kennedy, Charles B. Yackulic, Wyatt F. Cross, Paul E. Grams, Michael D. Yard, Adam J. Copp