Multi-species mixtures - new perspectives on models and mechanisms
Finn, John A.
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The delivery of essential ecosystem functions (primary productivity, maintenance of soil fertility, resistance to weed invasion etc.) may be compromised by global declines in biodiversity. There is still controversy about the description of, and mechanisms behind, Biodiversity-Ecosystem Function (BEF) relationships. The Diversity-Interactions model quantified BEF relationships in terms of all the pairwise interactions between the species in a community. The model gives the contribution of two species (i and j) to the functional response in a community as _ijPiPj, where _ij reflects the potential of the two species to contribute to the response and its actual contribution depends also on Pi and Pj, the initial relative abundance of the two species in the community. This model and variants fitted well to a wide range of functional responses (biomass production, respiration) from several, but not all, experiments that examined a wide range of organisms (plants, microorganisms) and levels of species richness (1 to 72 species). A modified version introduces a more complex effect of pairwise interaction. The properties of this more flexible model and its implications for BEF relationships are discussed, particularly in the context of grass-clover contributions to sward functions.
Is part ofGrassland Science in Europe, 2010, vol. 15, p. 782-784
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Diversity–interaction modeling: estimating contributions of species identities and interactions to ecosystem function Kirwan, Laura; Connolly, John; Finn, John A.; Brophy, Caroline; Lüscher, Andreas; Nyfeler, D.; Sebastià, Ma. T. (Ecological Society of America, 2009)We develop a modeling framework that estimates the effects of species identity and diversity on ecosystem function and permits prediction of the diversity–function relationship across different types of community ...
Connolly, John; Bell, Thomas; Bolger, Thomas; Brophy, Caroline; Carnus, Timothee; Finn, John A.; Kirwan, Laura; Isbell, Forest; Levine, Jonathan; Lüscher, Andreas; Picasso, Valentin; Roscher, Christiane; Sebastià, Ma. T.; Suter, Matthias; Weigelt, Alexandra (Wiley, 2013)The development of models of the relationship between biodiversity and ecosystem function (BEF) has advanced rapidly over the last 20 years, incorporating insights gained through extensive experimental work. We propose ...
Ecosystem function enhanced by combining four functional types of plant species in intensively managed grassland mixtures: a 3-year continental-scale field experiment Finn, John A.; Kirwan, Laura; Connolly, John; Sebastià, Ma. T.; Helgadottir, Aslaug; Baadshaug, Ole H.; Bélanger, Gilles; Black, Alistair; Brophy, Caroline; Collins, Rosemary P.; Cop, Jure; Dalmannsdóttir, S.; Delgado, Ignacio; Elgersma, Anjo; Fothergill, Michael; Frankow-Lindberg, Bodil E.; Ghesquiere, An; Golinska, Barbara; Golinski, Piotr; Grieu, Philippe; Gustavsson, Anne-Maj; Höglind, Mats; Huguenin-Elie, Olivier; Jørgensen, Marit; Kadziuliene, Zydre; Kurki, Päivi; Llurba, Rosa; Lunnan, Tor; Porqueddu, Claudio; Suter, Matthias; Thumm, Ulrich; Lüscher, Andreas (Wiley online library, 2013)A coordinated continental-scale field experiment across 31 sites was used to compare the biomass yield of monocultures and four species mixtures associated with intensively managed agricultural grassland systems. To increase ...