Showing papers by "Valerie T. Eviner published in 2010"
31 Jan 2010
241 citations
TL;DR: In this paper, the authors explore patterns in soil carbon storage in annual grass-dominated rangelands in California and show that soil C is highly predictable with depth, with cumulative soil C content increased to 2-3m depth in rangeland with a woody component and to at least 1-m depth, while the presence of woody plants increased soil C by an average of 40 Mg? ha 21 in the top meter of soil.
72 citations
TL;DR: Hawkes et al. as discussed by the authors showed that ecosystem impacts of exotic plants can feed back to increase invasion in Western US Rangelands. But they did not consider the impact of invasive plants on the native plants.
28 citations
16 Dec 2010
TL;DR: A number of general principles are presented that determine how pathogens inflence ecosystems over time, based on the welldeveloped fi elds of disturbance ecol ogy and the ecosystem effects of species composition.
Abstract: Many studies have demonstrated that pathogens can have strong effects on the per for mance of individual organisms, population dynamics, and community interactions. A more limited set of studies suggests that pathogens can alter a wide range of ecosystem functions in terrestrial systems; however, we are lacking a framework to predict the type and magnitude of ecosystem effects that a given pathogen will have. In this chapter, we present a number of general principles that determine how pathogens infl uence ecosystems over time, based on the welldeveloped fi elds of disturbance ecol ogy and the ecosystem effects of species composition. Our focus is not only on pathogens as disturbances but also as drivers of ecosystem pro cesses, even when their presence is not readily apparent.
7 citations
31 Dec 2010
4 citations