Evolutionary Ecology

, Volume 26, Issue 2, pp 435–448

Using successional theory to measure marine ecosystem health

Original Paper

DOI: 10.1007/s10682-011-9533-3

Cite this article as:
Sandin, S.A. & Sala, E. Evol Ecol (2012) 26: 435. doi:10.1007/s10682-011-9533-3

Abstract

Marine ecosystems are diverse and complex, providing significant challenges to the development of generalizable metrics of ecosystem health. Of particular concern is the varied form of change caused by multiple human activities, which limits the capacity to generate a single measure to encapsulate the overall condition of the ecosystem. Here we consider how successional theory can help to simplify our understanding of marine community structure, especially when viewed in context of human disturbance. During succession, the emergent properties of communities change in predictable ways. As communities mature, there is an increase in total production and biomass, the mean size of organisms, the level of internal recycling of food and nutrients, and the mean trophic level. Using a set of multi-species trophic models, we explore the changes in community structure that are likely to occur during succession. These changes include increases in biomass within trophic levels due to decreased rates of energy and food loss through trophic and production inefficiencies, and potential shifts from top-down control early in succession to bottom-up later. Because human activities disproportionately favor early-successional species, we can gain insights by considering community degradation in the context of succession being played in reverse. Indicators of health based on ecological succession thus provide a mechanistic view to measure the impact of human activities (both positive and negative) on marine ecosystems.

Keywords

Trophic dynamics Community development Top-down Bottom-up 

Copyright information

© Springer Science+Business Media B.V. 2011

Authors and Affiliations

  1. 1.Center for Marine Biodiversity and ConservationScripps Institution of OceanographyLa JollaUSA
  2. 2.Centre d’Estudis Avançats de BlanesConsejo Superior de Investigaciones CientíficasBlanesSpain
  3. 3.National Geographic SocietyWashingtonUSA