Overview of the 20th century impact of trace metal contamination in the estuaries of Todos os Santos Bay: Past, present and future scenarios

Hatje, Vanessa; Barros, Francisco

doi:10.1016/j.marpolbul.2012.07.009

Cited by 70 publications

(39 citation statements)

References 46 publications

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“…Another important result was that Subaé estuary was quite dissimilar form the other two systems due to high levels of inorganic contaminants specially at the upper estuary, as reported elsewhere (Hatje et al, 2006;Hatje and Barros, 2012). Some trace metals were important in the structure of the benthic assemblages, especially in the upper Subaé estuary.…”

Section: Discussionsupporting

confidence: 50%

Subtidal benthic macroinfaunal assemblages in tropical estuaries: Generality amongst highly variable gradients

Barros

Carvalho

Costa

et al. 2012

Marine Environmental Research

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Section: Discussionsupporting

confidence: 50%

Subtidal benthic macroinfaunal assemblages in tropical estuaries: Generality amongst highly variable gradients

Barros

Carvalho

Costa

et al. 2012

Marine Environmental Research

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“…upper, middle and lower estuary; Ysebaert et al, 1998;Lu et al, 2008), and similar studies in tropical regions are scarce (e.g. Barros et al, 2008Barros et al, , 2012. Distinct biogeographical regions may show different patterns of variation in several estuarine characteristics (e.g.…”

Section: Introductionmentioning

confidence: 98%

Intertidal benthic macrofaunal assemblages: changes in structure along entire tropical estuarine salinity gradients

Mariano

Barros

2014

J. Mar. Biol. Ass.

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Spatial variation in the structure of macrobenthic assemblages on intertidal flats is known to be related to different environmental variables. Most of the studies have observed that along the estuarine gradient, salinity is the most important variable driving the patterns of the macrobenthic assemblages. However, the great majority of studies have been done on single estuarine systems in temperate regions. We investigated the relationship between the macrobenthic assemblages in intertidal habitats and the environmental variables along three tropical estuaries. From lower to upper estuarine regions we sampled benthic macrofauna, salinity and sediments. The structure of the benthic assemblages was primarily related to salinity. There was a decrease in the number of taxa from the upper to the lower estuarine regions, indicating important deviation from Remane's model of estuarine diversity. There were important similarities of taxa abundance along different estuarine salinity gradients which can be properly tested in other tropical and temperate regions. We advocate that in order to adopt general and robust management practices it is essential to identify broad patterns and general rules governing estuarine systems.

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“…But, we believe that these patterns are strongly influenced by multiple human activities (e.g., fishing, sedimentation, effluents) which also change in space and influence reef environmental quality in this bay (e.g., Cruz et al, 2014). For instance, several coral reefs in TSB have historically undergone anthropic impacts such as contamination by organic and inorganic pollution from domestic influxes and industrial effluents (e.g., Souza Santos et al, 2000; Barros et al, 2012;Hatje and Barros, 2012). High levels of nutrients can increase cover and abundance of some sponge species (Zea et al, 1994), although it has been shown as a factor that reduces sponge species diversity FIGURE 5 | Relationship between total number of sponge-coral encounters and mean angelfish (spongivorous) density (ρ = 0.05; p = 0.8).…”

Section: Discussionmentioning

confidence: 99%

Spongivory by Fishes on Southwestern Atlantic Coral Reefs: No Evidence of Top-Down Control on Sponge Assemblages

et al. 2018

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Predator-prey dynamics can affect assemblage structure and ecosystem processes representing a central theory in ecology. In coral reef ecosystems, recent evidences have suggested that sponge assemblages in regions with high diversity, like the Caribbean, are controlled by reef fishes (i.e., top-down control); however, this has been poorly studied in low diversity coral reefs. This study investigated the influence of fish predators on sponge assemblage structure in South Atlantic coral reefs, systems with high endemism and relatively low hermatypic coral diversity. We investigates (i) whether sponge cover is negatively correlated to spongivorous fish density, (ii) potential spongivory effects on competitive interactions between sponges and hermatypic corals, and (iii) foraging preferences of spongivorous fishes. Benthic cover and spongivorous fish density were assessed by photo sampling and visual census, respectively. We did not observe a negative correlation of the total density of spongivorous fish with total sponge cover. However, a significant negative correlation between density of fish species Pomacanthus arcuatus and cover of sponge species Scopalina ruetzleri was found. Spongivorous fish consumed preferentially the sponges Desmapsamma anchorata, Niphates erecta, Aplysina cauliformis, and S. ruetzleri, the first two species considered palatable and the second two with chemically defense mechanism. An increase to angelfish density was not related with the number of coral-sponge encounters. Thus, the effects of spongivorous fishes on sponges cover and competitive interactions with hermatypic corals is weaker in Southwestern Atlantic than previously reported in Caribbean coral reefs. We discuss how local human impacts (e.g., fishing and nutrients input) can influence the observed patterns.

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Overview of the 20th century impact of trace metal contamination in the estuaries of Todos os Santos Bay: Past, present and future scenarios

Cited by 70 publications

References 46 publications

Subtidal benthic macroinfaunal assemblages in tropical estuaries: Generality amongst highly variable gradients

Subtidal benthic macroinfaunal assemblages in tropical estuaries: Generality amongst highly variable gradients

Intertidal benthic macrofaunal assemblages: changes in structure along entire tropical estuarine salinity gradients

Spongivory by Fishes on Southwestern Atlantic Coral Reefs: No Evidence of Top-Down Control on Sponge Assemblages

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