Download From Populations to Ecosystems: Theoretical Foundations for by Michel Loreau PDF

By Michel Loreau

The key subdisciplines of ecology--population ecology, neighborhood ecology, atmosphere ecology, and evolutionary ecology--have diverged more and more in fresh many years. what's seriously wanted this present day is an built-in, real-world method of ecology that displays the interdependency of biodiversity and environment functioning. From Populations to Ecosystems proposes an cutting edge theoretical synthesis that may let us to boost our basic knowing of ecological platforms and aid us to answer modern day rising worldwide ecological predicament. Michel Loreau starts off by way of explaining how the foundations of inhabitants dynamics and atmosphere functioning will be merged. He then addresses key concerns within the learn of biodiversity and ecosystems, akin to sensible complementarity, nutrition webs, balance and complexity, fabric biking, and metacommunities. Loreau describes the newest theoretical advances that hyperlink the houses of person populations to the mixture homes of groups, and the houses of useful teams or trophic degrees to the functioning of entire ecosystems, putting precise emphasis at the courting among biodiversity and environment functioning. ultimately, he turns his cognizance to the debatable factor of the evolution of complete ecosystems and their homes, laying the theoretical foundations for a real evolutionary surroundings ecology. From Populations to Ecosystems issues how you can a much-needed synthesis in ecology, person who bargains a fuller realizing of atmosphere methods within the wildlife.

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Additional resources for From Populations to Ecosystems: Theoretical Foundations for a New Ecological Synthesis (MPB-46) (Monographs in Population Biology, 46)

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2), this condition reduces to a21 Ͻ 1. 2) also necessarily implies a12 Ͻ 1 and hence overyielding of the poorest yielding monoculture by the mixture. But it does not necessarily imply a21 Ͻ 1 and hence overyielding of the highest yielding monoculture by the mixture. 7) shows, transgressive overyielding further requires that interspecific competition be smaller than intraspecific competition in both species. This in turn requires stronger niche differentiation than is required for stable coexistence and nontransgressive overyielding since the latter are compatible with a21 Ͼ 1.

13a). 34 CHAPTER 2 Thus, the species with the lowest R* also has the highest net resource supply and the highest resource consumption. Note that the best competitor does not necessarily maximize other functional properties, such as production and biomass. 13a); this is maximized when R* is minimized only if all species have equal production coefficients ␧i. 13); this is maximized when R* is minimized only if all species have equal production coefficients ␧i and mortality rates mi that are either equal or vary parallel to R*.

Thus, each consumer species tends to control the resource at an equilibrium level that is entirely determined by its own traits (incorporated into fi and mi). Since the resource R can have only one equilibrium value, all consumer species except one are competitively excluded. The species that wins the competition is the species with the lowest equilibrium resource requirement (R*). All other species have negative growth rates and are driven to extinction at that resource level because the latter is too low to meet their own resource requirement (Volterra 1926; Hsu et al.

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