Please use this identifier to cite or link to this item: http://hdl.handle.net/10553/121376
Title: Habitat configurations shape trophic and energetic dynamics of reef fishes in a tropicaltemperate transition zone: implications under a warming future
Authors: Bosch Guerra, Néstor Echedey 
Pessarrodona, Albert
Filbee-Dexter, Karen
Tuya, Fernando 
Mulders, Yannick
Bell, Sahira
Langlois, Tim
Wernberg, Thomas
UNESCO Clasification: 251005 Zoología marina
250203 Bioclimatología
251006 Procesos del fondo marino
Issue Date: 2023
Conference: International Temperate Reef Symposium (2023) 
Abstract: Understanding the extent to which species’ traits mediate patterns of community assembly is key to predict the effect of natural and anthropogenic disturbances on ecosystem functioning. Here, we apply a trait-based community assembly framework to understand how four different habitat configurations (kelp forests, Sargassum spp. beds, hard corals, and turfs) shape the trophic and energetic dynamics of reef fish assemblages in a tropical-temperate transition zone. Specifically, we tested (i) the degree of trait divergence and convergence in each habitat, (ii) which traits explained variation in species’ abundances, and (iii) differences in standing biomass (kg ha-1), secondary productivity (kg ha-1 day-1) and turnover (% day-1). Fish assemblages in coral and kelp habitats displayed greater evidence of trait convergence, while turf and Sargassum spp. habitats displayed a higher degree of trait divergence, a pattern that was mostly driven by traits related to resource use and thermal affinity. This filtering effect had an imprint on the trophic and energetic dynamics of reef fishes, with turf habitats supporting higher fish biomass and productivity. However, these gains were strongly dependent on trophic guild, with herbivores/detritivores disproportionately contributing to among-habitat differences. Despite these perceived overall gains, turnover was decoupled for fishes that act as conduit of energy to higher trophic levels (i.e. microinvertivores), with coral habitats displaying higher rates of fish biomass replenishment than turf despite their lower productivity. This has important implications for biodiversity conservation and fisheries management, questioning the long-term sustainability of ecological processes and fisheries yields in increasingly altered marine habitats.
URI: http://hdl.handle.net/10553/121376
Source: International Temperate Reef Symposium (2023)
Appears in Collections:Ponencias
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