Please use this identifier to cite or link to this item:
Title: The effects of climatic fluctuations and extreme events on running water ecosystems
Author: Woodward, Guy
Bonada i Caparrós, Núria
Brown, Lee E.
Death, Russell G.
Durance, Isabelle
Gray, Clare
Hladyz, Sally
Ledger, Mark E.
Milner, Alexander M.
Ormerod, Steve J.
Thompson, Ross M.
Pawar, Samraat
Keywords: Ecosistemes
Biologia d'aigua dolça
Biotic communities
Freshwater biology
Issue Date: 19-May-2016
Publisher: The Royal Society
Abstract: Most research on the effects of environmental change in freshwaters has focused on incremental changes in average conditions, rather than fluctuations or extreme events such as heatwaves, cold snaps, droughts, floods or wildfires, which may have even more profound consequences. Such events are commonly predicted to increase in frequency, intensity and duration with global climate change, with many systems being exposed to conditions with no recent historical precedent. We propose a mechanistic framework for predicting potential impacts of environmental fluctuations on running-water ecosystems by scaling up effects of fluctuations from individuals to entire ecosystems. This framework requires integration of four key components: effects of the environment on individual metabolism, metabolic and biomechanical constraints on fluctuating species interactions, assembly dynamics of local food webs, and mapping the dynamics of the meta-community onto ecosystem function. We illustrate the framework by developing a mathematical model of environmental fluctuations on dynamically assembling food webs. We highlight (currently limited) empirical evidence for emerging insights and theoretical predictions. For example, widely supported predictions about the effects of environmental fluctuations are: high vulnerability of species with high per capita metabolic demands such as large-bodied ones at the top of food webs; simplification of food web network structure and impaired energetic transfer efficiency; and reduced resilience and top-down relative to bottom-up regulation of food web and ecosystem processes. We conclude by identifying key questions and challenges that need to be addressed to develop more accurate and predictive bio-assessments of the effects of fluctuations, and implications of fluctuations for management practices in an increasingly uncertain world.
Note: Reproducció del document publicat a:
It is part of: Philosophical Transactions of the Royal Society B: Biological Sciences, 2016, vol. 371, num. 1694, p. 20150274
Related resource:
ISSN: 0962-8436
Appears in Collections:Articles publicats en revistes (Institut de Recerca de la Biodiversitat (IRBio))
Articles publicats en revistes (Biologia Evolutiva, Ecologia i Ciències Ambientals)

Files in This Item:
File Description SizeFormat 
661787.pdf1.42 MBAdobe PDFView/Open

This item is licensed under a Creative Commons License Creative Commons