African Savanna Trophic Cascade

We evaluated whether megaherbivores could counteract a behaviorally mediated trophic cascade by redistributing nutrients that accumulate through fear. Le roux et al.

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By experimentally clearing plots to increase visibility and reduce predation risk we tested the collective role of both apex consumer guilds in influencing nutrient dynamics in african savanna.

African savanna trophic cascade. Where aggregations of fearful prey can lead to fecal nutrient accumulation megaherbivores redistribute these nutrients away from such predator maintained biogeochemical hotspots by feeding in areas frequented by prey species but defecating widely. Kerley 1 and joris p g m. When experiencing a coral reef or african savanna it is easy to be overwhelmed by the abundance of large herbivores.

Use the drawing below to either type or write in the boxes the resulting trophic cascade. Many examples of trophic cascades in marine and terrestrial ecosystems come from relatively simple linear food chains borer et al. In addition to being a prominent structural feature of savanna and forest ecosystems tree cover has far reaching consequences for ecosystem function trees are a key component of stored carbon c and thus important in the potential for ecosystems to act as carbon dioxide co 2 sinks in the effort to curb global warming despite this understanding the factors that influence.

Use the pattern below to describe the trophic cascade. Describe in your own words how the trophic cascade is regulated by the direct and indirect control of rinderpest. Experimentally show how megaherbivores can modify predator triggered trophic cascades.

Use the pattern below to describe the trophic cascade. Megaherbivores modify trophic cascades triggered by fear of predation in an african savanna ecosystem. Use the drawing below to either type or write in the boxes the resulting trophic cascade.

Elephants and large parrotfishes are mobile charismatic and easily capture. Le roux e 1 kerley gih 2 cromsigt jpgm 3. 1 centre for african conservation ecology department of zoology nelson mandela university p o.

Box 77000 port elizabeth 6031 south africa. We tested the trophic cascade hypothesis in laikipia kenya a 12000 km2 region that was naturally recolo nized by african wild dogs lycaon pictus following a 20 year absence woodroffe 2011. Current biology report megaherbivores modify trophic cascades triggered by fear of predation in an african savanna ecosystem elizabeth le roux 1 3 graham i h.

We tested the trophic cascade hypothesis. Shape the ecological context in which trophic cascades either emerge or are overridden in terrestrial food webs. After a decades long absence african wild dogs lycaon pictus recolonized the laikipia plateau in central kenya which we hypothesized would trigger a trophic cascade via suppression of their primary prey dik dik madoqua guentheri and the subsequent relaxation of browsing pressure on trees.

Box 77000 port elizabeth 6031 south africa. Cromsigt1 2 1centre for african conservation ecology department of zoology nelson mandela university p o. Describe in your own words how the trophic cascade is regulated by the direct and indirect control of rinderpest.

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