Responses of Fish and Macrobenthic Assemblages to Hydrologic Disturbances in Tijuana Estuary and Los Peñasquitos Lagoon, California

Estuaries ◽  
1991 ◽  
Vol 14 (1) ◽  
pp. 80 ◽  
Author(s):  
Christopher S. Nordby ◽  
Joy B. Zedler
Keyword(s):  
Macrobenthic Assemblages ◽  
Tijuana Estuary

Colonization, succession, and nutrition of macrobenthic assemblages in a restored wetland at Tijuana Estuary, California

2004 ◽  
Vol 60 (4) ◽  
pp. 755-770 ◽  
Author(s):  
Serena M Moseman ◽  
Lisa A Levin ◽  
Carolyn Currin ◽  
Charlotte Forder
Keyword(s):  
Restored Wetland ◽  
Macrobenthic Assemblages ◽  
Tijuana Estuary

scholarly journals A review on macrobenthic trophic relationships along subtropical sandy shores in southernmost Brazil

2014 ◽  
Vol 14 (3) ◽  
Author(s):  
Raphael Mathias Pinotti ◽  
Diogo Marroni Minasi ◽  
Leonir André Colling ◽  
Carlos Emílio Bemvenuti
Keyword(s):  
Surf Zone ◽  
Fish Assemblages ◽  
Trophic Levels ◽  
Trophic Relationships ◽  
Intermediate Type ◽  
Sandy Shores ◽  
Macrobenthic Assemblages ◽  
High Species Richness ◽  
Asterionellopsis Glacialis

Main trophic relationships that occur along the exposed sandy shores in southernmost Brazil (∼33° S) are established taking into account several biological compartments operating at morphodynamically distinct environments. Beaches are predominantly of the intermediate type but some stretches of coastline are truly dissipative (Cassino Beach) or tending-to-reflective (Concheiros Beach), presenting thus diverse biological compartments and inhabitant macrobenthic assemblages. Dense concentrations of the surf-zone diatom Asterionellopsis glacialis are responsible - at least for the intermediate shorelines - for the most year-round primary production, sustaining several consumers up to tertiary level. Among them, bivalves Amarilladesma mactroides, Donax hanleyanus and the hippid crabEmerita brasiliensis can account for more than 95% of all the surf-zone secondary production, in addition to the elevated biomass of the suspension-feeder polychaete Spio gaucha and the scavenger isopod Excirolana armata. Crabs, whelks, carnivorous polychaetes, seabirds and surf-zone fishes may also be present and occupy superior trophic levels depending on the beach morphodynamics. Based on the high species richness, abundance and the role of macrobenthic fauna in transferring matter and energy to seabirds and the surf-zone fish assemblages, we address this important issue on the Southwestern Atlantic ecology. Conservation efforts should be implemented for the southernmost Brazilian sandy shores, at least for those non urbanized areas.

scholarly journals Functional diversity of macrobenthic assemblages decreases in response to sewage discharges

2016 ◽  
Vol 66 ◽  
pp. 65-75 ◽  
Author(s):  
Joao B. Gusmao ◽  
Kalina M. Brauko ◽  
Britas K. Eriksson ◽  
Paulo C. Lana
Keyword(s):  
Functional Diversity ◽  
Macrobenthic Assemblages ◽  
Sewage Discharges

scholarly journals Unravelling the impact of harvesting pressure on canopy-forming macroalgae

2016 ◽  
Vol 67 (1) ◽  
pp. 153 ◽  
Author(s):  
Doriane Stagnol ◽  
Renaud Michel ◽  
Dominique Davoult
Keyword(s):  
Habitat Characteristics ◽  
Spatiotemporal Variability ◽  
Macrobenthic Assemblages ◽  
Wide Range ◽  
The Matrix ◽  
Commercial Species ◽  
Canopy Removal ◽  
The Impact ◽  
Relevant Finding

Canopy-forming macroalgae create a specific surrounding habitat (the matrix) with their own ecological properties. Previous studies have shown a wide range of responses to canopy removal. Magnitude and strength of the effects of harvesting are thought to be context-dependent, with the macroalgal matrix that can either soften or exacerbate the impact of harvesting. We experimentally examined in situ the effect of harvesting on targeted commercial species, and how these potential impacts might vary in relation to its associated matrix. We found that patterns of recovery following the harvesting disturbance were variable and matrix specific, suggesting that local factors and surrounding habitat characteristics mediated the influence of harvesting. The greatest and longest effects of harvesting were observed for the targeted species that created a dominant and monospecific canopy on their site prior to the disturbance. Another relevant finding was the important natural spatiotemporal variability of macrobenthic assemblages associated with canopy-forming species, which raises concern about the ability to discriminate the natural variability from the disturbance impact. Finally, our results support the need to implement ecosystem-based management, assessing both the habitat conditions and ecological roles of targeted commercial species, in order to insure the sustainability of the resource.

scholarly journals Benthic communities in three Mediterranean touristic ports: MAPMED project

2021 ◽  
Vol 9 ◽  
Author(s):  
Eva Chatzinikolaou ◽  
Panagiotis Damianidis ◽  
Christina Pavloudi ◽  
Aikaterini Vasileiadou ◽  
Sarah Faulwetter ◽  
...  
Keyword(s):  
Invasive Species ◽  
Mediterranean Sea ◽  
Quality Indicators ◽  
Environmental Quality ◽  
Economic Activity ◽  
Anthropogenic Disturbance ◽  
Benthic Communities ◽  
Macrobenthic Communities ◽  
Macrobenthic Assemblages ◽  
Port Areas

Mediterranean ports are sources of significant economic activity and at the same time they act as recipients of considerable anthropogenic disturbance and pollution. Polluted and low-in-oxygen sediments can negatively impact benthic biodiversity and favour recruitment of opportunistic or invasive species. Macrobenthic communities are an important component of the port biota and can be used as environmental quality indicators. However, a baseline database for benthic biodiversity in Mediterranean ports has not yet been widely established. Macrobenthic assemblages were recorded in three Mediterranean touristic ports under the framework of the ENPI CBC MED project MAPMED (MAnagement of Port Areas in the MEDiterranean Sea Basin). Samples were collected from Cagliari (Sardinia, Italy), Heraklion (Crete, Greece) and El Kantaoui (Tunisia) ports during February, May and September 2012. The sampling stations were selected according to the different sectors within each port (i.e. leisure, fishing, passenger/cargo vessels and shipyard). A total of 277 taxa belonging to 12 phyla were found, of which the 96 taxa were present in all three ports. El Kantaoui port hosted the highest number of macrobenthic taxa. Mollusca were the most abundant group (34%) in all ports. The highest percentage of opportunistic taxa per station was found before the touristic period in the shipyard of Heraklion port (89.3%).

Heavy metal pollution and macrobenthic assemblages in soft sediments in two Sydney estuaries, Australia

1998 ◽  
Vol 49 (6) ◽  
pp. 533 ◽  
Author(s):  
Jonathan S. Stark
Keyword(s):  
Heavy Metals ◽  
Environmental Variables ◽  
Spatial Scales ◽  
Organic Matter Content ◽  
Matter Content ◽  
Soft Sediments ◽  
Lead And Zinc ◽  
Macrobenthic Assemblages ◽  
Order Of Magnitude ◽  
Copper Lead

The influence of heavy metals (copper, lead and zinc) associated with urban runoff, on assemblages of macrofauna in intertidal soft sediments was studied in two estuaries in the Sydney region. The patterns of distribution and abundance of fauna and assemblages was found to vary significantly at several spatial scales: within bays in an estuary, between bays within an estuary and between bays from different estuaries. Significant differences were found in concentrations of heavy metals in sediments, but there was very little difference among bays in other environmental variables: grain-size characteristics and organic matter content of sediments. Bays polluted by heavy metals had significantly different assemblages to unpolluted bays, were generally less diverse and were characterized by an order-of-magnitude greater abundance of capitellids, spionids, nereids and bivalves. Unpolluted bays had greater abundance of crustaceans and several polychaete families, including paraonids and nephtyids and were generally more diverse. There was a significant correlation between patterns of assemblages and concentrations of heavy metals, but not with other environmental variables.

Consistent patterns of variation in macrobenthic assemblages and environmental variables over multiple spatial scales using taxonomic and functional approaches

2016 ◽  
Vol 120 ◽  
pp. 191-201 ◽  
Author(s):  
Puri Veiga ◽  
Ana Catarina Torres ◽  
Fernando Aneiros ◽  
Isabel Sousa-Pinto ◽  
Jesús S. Troncoso ◽  
...  
Keyword(s):  
Environmental Variables ◽  
Spatial Scales ◽  
Multiple Spatial Scales ◽  
Macrobenthic Assemblages
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