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Abstract_en: Spatial distribution of biodiversity always fascinated ecologists. What are the main drivers of species distribution and why is species richness peaking in the tropics? Understanding food webs dynamics is a key point in trying to clarify this question. Trophic cascade is a central feature of food webs and has been widely documented in diverse ecosystems. However, their strength can be highly variable and it seems that temperature plays a role in this variation by strengthening the top down effect of predators on primary producers. Temperature is an essential driver of many ecosystem processes over large biogeographical gradients and can affect food webs structure in many ways by impacting (1) organisms’ biological and chemical rates, (2) organisms’ body size and (3) species richness; and indirectly altering the strength of trophic interaction. The nature of the relationships between temperature, body size, metabolic rates and richness remains hazy and lead to conflicting results. We use a modelling approach to investigate the impact of temperature on trophic cascade through biological rates, body size and richness. | ||
Email: [email protected] | ||
Image: az.jpg | ||
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key: 22 | ||
Name: Jonathan | ||
LastName: Brassard | ||
Status: Professional researcher | ||
Year_start: 2011 | ||
Title_en: Field coordinator | ||
Email: [email protected] | ||
Image: jo.png | ||
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key: 14 | ||
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