The Effects Of Coral Reef Ecosystem On Coral Reefs Ecosystem

1022 Words Nov 2nd, 2016 5 Pages
The present study consistent with previous finding by Casey et al. (2016) and Jennings et al. (1995) regarding bottom up processes in coral reef ecosystem. Also show a profound contrast to widely accepted top-down processes in coral reef ecosystem, indicated by weak relationship on prey-predator interaction and strong positive relationship between hard coral cover and fish biomass.
Despite there are more studies confirm cascading effect in coral reefs such as indirect effect on mesopredator and herbivore density( (Friedlandler and DeMartini 2002; Ruppert et al. 2013; Ritchie and Johnson 2009), algal cover sponge cover (Rasher et al 2013; Loh et al. 2015) resulting decline in coral cover and juvenile coral (Rasher et al 2013; Casey et al 2015). However, most of those research were conducted in region where confounding factors persists such as fishing pressure across many trophic levels (predator, herbivore, planktivore), pollution, and terrestrial run-off. Eventhough some research were conducted in the nearly pristine area, such as Dulvy (2004) in Lau Island Fiji with human population densities ranging between two and 42 people km-2. However, this area may not be pristine in a historical context and non exclusive predator fishing still occurs. Hence, recent unambiguous empirical evidence of trophical cascade in coral reef ecosystem with the absent of confounding factors was scarce (Ferretti et al 2010).
Our results largerly consistent with Casey (2016) that found no…
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