Human footprints on benthic communities in marine reserves: a study case in the most productive upwelling system worldwide

Riascos, José M.; Uribe, Roberto A.; Donayre, Susan; Flores, Daniel Germán; Galindo, Oscar; Quispe, Carlos; González, Jorge

doi:10.3354/meps11857

Cited by 7 publications

(5 citation statements)

References 42 publications

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“…A strong drop in the mean abundance, and the fact that fishermen commonly select larger animals, implies a drop in the SSB, less larvae in the water column and possibly fewer individuals surviving into recruits. This persistent decreasing trend in the stock is in line with an independent study that monitored benthic communities from Bahía Independencia between 2004 and 2010 (Riascos et al, 2016). They found that the continuous exploitation of four species (including A. atra) was the most important driving force of changes in the benthic community structure, characterized by a ∼43% reduction in biomass of the whole benthic community.…”

Section: Human Exploitation and Enso Influence The Early Stages Of Ausupporting

confidence: 79%

“…Therefore, the ecological effects of human exploitation in Bahía Independencia are seemingly overlaying the expected responses of A. atra populations to changes in climate patterns. This underscores the need to integrate the interaction between humans, biological communities and the particularities of the physical setting in ecological studies (Riascos et al, 2016). Seasonal changes in the frequency and magnitude of upwelling pulses -with the concurrent changes in temperature and food availability -have been suggested to drive the chronology of the reproductive cycle of A. atra at several locations in Chile (Jaramillo and Navarro, 1995;Cantillánez, 2013, 2014).…”

Section: Human Exploitation and Enso Influence The Early Stages Of Aumentioning

confidence: 99%

“…The Humboldt Current upwelling system off Peru (hereafter HCS) is considered the most productive marine ecosystem of the world (Ryther, 1969). Among the four recognized upwelling centers in the HCS, the permanent upwelling area of Bahía Independencia is the most important, with extremely high biomass and productivity of shellfisheries (Mendo and Wolff, 2003;Riascos et al, 2016). A strong, coastal upwelling driven by trade winds brings deep, nutrient-rich water into the euphotic layer, fueling vast primary production that is then converted in high secondary productivity (Arntz and Fahrbach, 1996).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The Early Life History Transitions of the Bivalve Aulacomya atra From the Humboldt Current System Off Peru Are Affected by Human Exploitation and Modulated by El Niño–La Niña Cycle

2019

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Section: Human Exploitation and Enso Influence The Early Stages Of Ausupporting

confidence: 79%

Section: Human Exploitation and Enso Influence The Early Stages Of Aumentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

The Early Life History Transitions of the Bivalve Aulacomya atra From the Humboldt Current System Off Peru Are Affected by Human Exploitation and Modulated by El Niño–La Niña Cycle

2019

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“…In the case of Sechura, partial information of the biomass of accompanying species could be obtained from some scallop surveys (period 2004-2009). Independencia values were mainly obtained from supplementary material provided by Riascos et al (2016). Complementary information (in particular for polychaetes and small gastropods and crustaceans) was obtained from the baseline study (Gonzales and Yépez, 2007) for Sechura, and from Gutiérrez (2017) for Independencia.…”

Section: Input Parametersmentioning

confidence: 99%

Comparative Food Web Analysis of Two Peruvian Bay Systems Along a Latitudinal Gradient: Resource Use and the Environmental Envelope

et al. 2022

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The coast of Peru lies within the tropics under the influence of the cold, nutrient-rich waters of the Humboldt Current and the interannual onslaught of the El Niño phenomenon. The Peruvian upwelling system is exceptionally productive and is comprised of subsystems at different scales along the coast. We aimed to understand the differences between two shallow coastal systems along a latitudinal gradient: Sechura Bay in the north (at the convergence of Humboldt and tropical waters) and Independencia Bay in the central-south (under typical upwelling conditions). We compared their biodiversity, trophic dynamics, community energetics, resource use and underlying abiotic conditions. Our analysis revealed that over the past two decades, Sechura has shown a warming trend, while Independencia has maintained its cold water conditions. Chlorophyll concentrations have risen significantly in both systems, higher values in Sechura suggesting there is an increase in local pressures that could lead to eutrophication. Trophic models of the La Niña 07/08 period revealed that both systems are bottom-up driven with high biomass and production at the lower trophic levels, though top-down controls were also shown, particularly in Sechura. While primary productivity was similar in both systems, differences were found in the structure and size of energy flows. More cycling and higher transfer efficiency were found in Independencia, where phytoplankton-based food chains played the main role in the overall dynamic. In contrast, the detritus food chain appears to be more relevant for energy flow in Sechura. Differences in biota and flow structure relate to the systems’ environmental conditions, i.e., more diverse warm-water species in the north and mostly cold water adapted species (mainly invertebrate filter-feeders and their predators) in the central-south. Catches in both systems were dominated by the diving fisheries and comprised mostly scallops (bottom-cultured), snails and fish in Sechura, and mussels, clams, crabs and fish in Independencia. Overall, system indicators suggest that Sechura is a comparatively less developed system. Independencia shall likely maintain its general highly productive system features, whereas Sechura will continue to be more frequently disturbed by El Niño and ongoing human-driven activities, reducing its overall stability and functionality. In the context of climate change, acknowledging these differences is essential for future adaptive management regimes.

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“…The Southeast Pacific is characterized by important upwelling systems along the Chilean and Peruvian coasts [ 20 – 22 ], that have sustained and been impacted by human groups for at least 12 ka [ 11 , 23 – 27 ]. One of the most productive of these upwellings is located in the north-central region of Chile, near Tongoy (30°12′ S–71°34′ W, [ 20 , 21 , 28 ], figure 1 ).…”

Section: Introductionmentioning

confidence: 99%

Benthic communities under anthropogenic pressure show resilience across the Quaternary

et al. 2017

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The Southeast Pacific is characterized by rich upwelling systems that have sustained and been impacted by human groups for at least 12 ka. Recent fishing and aquaculture practices have put a strain on productive coastal ecosystems from Tongoy Bay, in north-central Chile. We use a temporal baseline to determine whether potential changes to community structure and composition over time are due to anthropogenic factors, natural climatic variations or both. We compiled a database (n = 33 194) with mollusc species abundances from the Mid-Pleistocene, Late Pleistocene, Holocene, dead shell assemblages and live-sampled communities. Species richness was not significantly different, neither were diversity and evenness indices nor rank abundance distributions. There is, however, an increase in relative abundance for the cultured scallop Argopecten, while the previously dominant clam Mulinia is locally very rare. Results suggest that impacts from both natural and anthropogenic stressors need to be better understood if benthic resources are to be preserved. These findings provide the first Pleistocene temporal baseline for the south Pacific that shows that this highly productive system has had the ability to recover from past alterations, suggesting that if monitoring and management practices continue to be implemented, moderately exploited communities from today have hopes for recovery.

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Human footprints on benthic communities in marine reserves: a study case in the most productive upwelling system worldwide

Cited by 7 publications

References 42 publications

The Early Life History Transitions of the Bivalve Aulacomya atra From the Humboldt Current System Off Peru Are Affected by Human Exploitation and Modulated by El Niño–La Niña Cycle

The Early Life History Transitions of the Bivalve Aulacomya atra From the Humboldt Current System Off Peru Are Affected by Human Exploitation and Modulated by El Niño–La Niña Cycle

Comparative Food Web Analysis of Two Peruvian Bay Systems Along a Latitudinal Gradient: Resource Use and the Environmental Envelope

Benthic communities under anthropogenic pressure show resilience across the Quaternary

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