期刊
TRENDS IN ECOLOGY & EVOLUTION
卷 28, 期 7, 页码 423-431出版社
ELSEVIER SCIENCE LONDON
DOI: 10.1016/j.tree.2013.03.008
关键词
biomass pyramid; trophic pyramid; body-size-distribution; ecological baselines; macroecology; metabolic theory of ecology; omnivory; ontogenetic diet shift; size spectra; turnover
资金
- NSERC Vanier Canada Graduate Scholarship
- NSERC Discovery Grants
- Sloan Fellowship
- Directorate For Geosciences [1041705] Funding Source: National Science Foundation
- Division Of Ocean Sciences [1041705] Funding Source: National Science Foundation
Biomass distribution and energy flow in ecosystems are traditionally described with trophic pyramids, and increasingly with size spectra, particularly in aquatic ecosystems. Here, we show that these methods are equivalent and interchangeable representations of the same information. Although pyramids are visually intuitive, explicitly linking them to size spectra connects pyramids to metabolic and size-based theory, and illuminates size-based constraints on pyramid shape. We show that bottom-heavy pyramids should predominate in the real world, whereas top-heavy pyramids indicate overestimation of predator abundance or energy subsidies. Making the link to ecological pyramids establishes size spectra as a central concept in ecosystem ecology, and provides a powerful framework both for understanding baseline expectations of community structure and for evaluating future scenarios under climate change and exploitation.
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