منابع مشابه
Ecosystem flux and biotic modification as drivers of metaecosystem dynamics.
The fluxes of energy, matter, and organisms are important structuring forces of metaecosystems. Such ecosystem fluxes likely interact with environmental heterogeneity and differentially affect the diversity of multiple communities. In an aquatic mesocosm experiment, we tested how ecosystem flux and patch heterogeneity affected the diversity of bacteria, phytoplankton, and zooplankton metacommun...
متن کاملDrivers of nitrogen transfer in stream food webs across continents.
Studies of trophic-level material and energy transfers are central to ecology. The use of isotopic tracers has now made it possible to measure trophic transfer efficiencies of important nutrients and to better understand how these materials move through food webs. We analyzed data from thirteen 15 N-ammonium tracer addition experiments to quantify N transfer from basal resources to animals in h...
متن کاملControl of a Semi-Circular Planform Wing in a “Gusting” Unsteady Free stream Flow II: Modeling and Feedback Design
The research outlined in our two parts abstract is carried as part of a MURI research program whose purpose is to use feedback flow control to extend the range of aspect ratios, Reynolds numbers and angles of attack (AOA) for which high lift and high maneuverability can be achieved. Our work is motivated by the remarkable aerodynamic performance of bio-fliers wings, enabled by their stable lead...
متن کاملThe Importance of Biotic vs. Abiotic Drivers of Local Plant Community Composition Along Regional Bioclimatic Gradients
We assessed if the relative importance of biotic and abiotic factors for plant community composition differs along environmental gradients and between functional groups, and asked which implications this may have in a warmer and wetter future. The study location is a unique grid of sites spanning regional-scale temperature and precipitation gradients in boreal and alpine grasslands in southern ...
متن کاملQuantifying effects of abiotic and biotic drivers on community dynamics with multivariate autoregressive (MAR) models.
Long-term ecological data sets present opportunities for identifying drivers of community dynamics and quantifying their effects through time series analysis. Multivariate autoregressive (MAR) models are well known in many other disciplines, such as econometrics, but widespread adoption of MAR methods in ecology and natural resource management has been much slower despite some widely cited ecol...
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ژورنال
عنوان ژورنال: BioScience
سال: 2013
ISSN: 1525-3244,0006-3568
DOI: 10.1525/bio.2013.63.6.6