Stable isotopes reveal food web modifications along the upstream–downstream gradient of a temperate stream

Simulating Food Web Dynamics along a Gradient: Quantifying Human Influence

Realistically parameterized and dynamically simulated food-webs are useful tool to explore the importance of the functional diversity of ecosystems, and in particular relations between the dynamics of species and the whole community. We present a stochastic dynamical food web simulation for the Kelian River (Borneo). The food web was constructed for six different locations, arrayed along a grad...

Stable isotopes identify dispersal patterns of stonefly populations living along stream corridors

1. Populations in different locations can exchange individuals depending on the distribution and connectivity of suitable habitat, and the dispersal capabilities and behaviour of the organisms. We used an isotopic tracer, N, to label stoneflies (Leuctra ferruginea) to determine the extent of adult flight along stream corridors and between streams where their larvae live. 2. In four mass, mark-c...

Stable isotopes and mtDNA reveal niche segregation but no evidence of 1 intergradation along a habitat gradient in the lesser whitethroat complex

Tracing energy flow in stream food webs using stable isotopes of hydrogen

JACQUES C. FINLAY* , , RICHARD R. DOUCETT ‡ AND CAMILLE M CNEELY † *Department of Ecology, Evolution and Behavior, University of Minnesota, St Paul, MN, U.S.A. St Anthony Falls Laboratory, National Center for Earth-surface Dynamics, University of Minnesota, MN, U.S.A. Colorado Plateau Stable Isotope Laboratory, Merriam Powell Center for Environmental Research, Northern Arizona University, Flags...

Stable isotopes reveal rail-associated behavior in a threatened carnivore

Human-wildlife conflict is a leading cause of adult mortality for large carnivores worldwide. Train collision is the primary cause of mortality for threatened grizzly bears (Ursus arctos) in Banff National Park. We investigated the use of stable isotope analysis as a tool for identifying bears that use the railway in Banff. Rail-associated bears had higher δ(15)N and δ(34)S values than bears sa...