Variación ambiental y patrones di etarios del erizo negro Tetrapygus niger en costas intermareales rocosas del norte de Chile

Navarrete, Arturo H; Camus, Patricio A.; Opazo, Lucy

doi:10.4067/s0716-078x2008000300001

Cited by 8 publications

(3 citation statements)

References 14 publications

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“…En este sentido, el evento El Niño 2004-2005 aparece como una primera explicación potencial de los cambios observados. Un fenómeno similar se registró en los patrones de riqueza dietaria del erizo negro Tetrapygus niger en las mismas localidades y tiempos (Navarrete et al 2008), aunque con efectos más contrastantes entre los períodos de presencia y ausencia del evento El Niño. De hecho la riqueza dietaria de T. niger mostró una clara asociación negativa con la TSM, lo cual no ocurrió con E. niger.…”

Section: Discussionunclassified

Caracterización trófica del placóforo intermareal Enoplochiton niger en el norte de Chile: variación ambiental y patrones dietarios a nivel local y region

Sanhueza

Navarrete

Opazo

et al. 2008

Rev. chil. hist. nat.

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The role and impact of herbivores on rocky intertidal food webs could be more complex and diverse than previously considered, particularly in the case of larger and more abundant consumers such as the placophoran mollusc Enoplochiton niger. This species is one of the largest (up to 20 cm) and ecologically most important grazers on rocky shores of northern Chile, but also one of the lesser known species in trophic terms. This work presents an assessment of the dietary patterns of E. niger in four communities of northern Chile, distributed along 1,000 km of coastline and sampled seasonally from winter 2004 to autumn 2006. The analysis included the relationship of its diet with physical and biological factors, and particularly the potential effect of the 2004-2005 El Niño event that occurred during the study period. At a regional level, the dietary spectrum of E. niger comprised a total of 98 food resources (60 algal items and 38 invertebrate items), and the most important items were sessile organisms of encrusting and layer-forming growth habits. E. niger exhibited a very high niche breadth at both local and regional levels (ranging from 20.7 to 28.0; Levins' index), and its dietary richness at the individual level was independent from its body size. Both the number of dietary items consumed per individual and the taxonomic composition of the diet did not show statistical differences among communities, but they were significantly different between the El Niño and non-El Niño periods. There was no clear relationship between the dietary patterns of E. niger and the contrasting levels of

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Section: Discussionunclassified

Caracterización trófica del placóforo intermareal Enoplochiton niger en el norte de Chile: variación ambiental y patrones dietarios a nivel local y region

Sanhueza

Navarrete

Opazo

et al. 2008

Rev. chil. hist. nat.

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“…The principal marine herbivores of the Peruvian Province are the echinoids Loxechinus and Tetrapygus (Navarrete et al., 2008 ; Vásquez & Buschmann, 1997 ); chitons (Camus et al., 2012 ; Sanhueza et al., 2008 ); limpet‐like gastropods (Aguilera, 2011 ; Aguilera et al., 2015 ; Aguilera & Navarrete, 2012 ; Aguilera, Navarrete, & Broitman, 2013 ; Aguilera, Valdivia, & Broitman, 2013 ); and fishes ( Aplodactylus , Girella , Scartichthys , and Sicyases ) (Ojeda & Muñoz, 1999 ; Paine & Palmer, 1978 ; Ruz et al., 2018 ). The abundance of herbivorous fishes in central Chile (20% of sampled individuals) is double that on the coast of California (Stepien, 1990 ), and is among the highest on any temperate coast.…”

Section: Ecological Guilds and Their Historymentioning

confidence: 99%

The temperate marine Peruvian Province: How history accounts for its unusual biota

Vermeij,

DeVries,

Griffin

et al. 2024

Ecology and Evolution

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The Peruvian Province, from 6° S in Peru to 42° S in Chile, is a highly productive coastal marine region whose biology and fossil record have long been studied separately but never integrated. To understand how past events and conditions affected today's species composition and interactions, we examined the role of extinction, colonization, geologic changes to explain previously unrecognized peculiar features of the biota and to compare the Peruvian Province's history to that of other climatically similar temperate coasts. We synthesized all available data on the benthic (or benthically feeding) biota, with emphasis on fossilizable taxa, for the interval from the Miocene (23–5.4 Ma) and Pliocene (5.4–2.5 Ma) to the present. We outline the history of ecological guilds including primary producers, herbivores, predators, and suspension‐feeders and document patterns of extinction, colonization, and geographic restriction. We identify twelve unusual attributes of the biota, most of which are the result of repeated episodes of extinction. Several guilds present during the Miocene and Pliocene are not represented in the province today, while groups such as kelps and perhaps intertidal predatory sea stars are relative newcomers. Guilds on soft bottoms and in sheltered habitats were severely affected by extinction, whereas those on hard bottoms were most affected by colonists and held their own in diversity. The Peruvian Province has not served as a biogeographic refuge, in contrast to the coasts of Australasia and Argentina, where lineages no longer present in the Peruvian Province survive. The loss of sheltered habitats since the Pliocene explains many of the present‐day peculiarities of the biota. The history of the province's biota explains its unique attributes. High productivity, a rich Southern Hemisphere heritage, and colonization from the north account for the present‐day composition and unusual characteristics of the biota.

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“…El Niño effects on higher trophic levels in the eastern Pacific are better studied and appear to relate to availability of food. For example, California sea lions (Zalopus californicus) performed longer foraging trips into oceanic waters during summer 2004 [59]; the Galapagos fur seal (Arctocephalus galapagoensis) migrated to the coast of Ecuador in September 2004 [60]; and the intertidal black sea urchin (Tetrapygus niger) recorded dietary changes between August 2004 and January 2005 [61].…”

Section: Interannual Variability and The Weak El Niño Eventsmentioning

confidence: 99%

Hyperiid amphipods from the Gulf of Ulloa and offshore region, Baja California: The possible role of the gelatinous zooplankton as a transport vector into the coastal shelf waters

Lavaniegos¹

2020

PLoS ONE

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Hyperiid amphipod species from the Gulf of Ulloa, Baja California, and the adjacent region (from the shelf break to 200 km offshore) were analyzed to evaluate diversity and abundances. This productive area supports small-scale commercial fisheries, including sand bass (Paralabrax nebulifer), California spiny lobster (Panulirus interruptus), abalones, clams, and others. Strong coastal upwelling events were observed during summer seasons of the period 2002–2008 between Punta Eugenia and Punta Abreojos. The upwelling plumes at Punta Abreojos are transported southward in slope waters bordering the coastal shelf of the Gulf of Ulloa, contributing to the separation of coastal and oceanic regions, and explain differences in amphipod diversity and abundances between both regions. In the offshore region, the most abundant species were Vibilia armata, Lestrigonus schizogeneios, Primno brevidens, and Eupronoe minuta, similar to previous findings in northern regions of Baja California and southern California. However, abundances of these species were lower (10–30 individuals/1000 m3), only reaching 20–50% of abundance levels reported off northern Baja California. In the coastal shelf of the Gulf of Ulloa, amphipods were virtually absent during 2002, 2003 and 2006. However, during 2004 and 2005, abundances of P. brevidens increased (54 and 20 ind/1000 m3, respectively). Moreover, during the late summer of 2007, abundances of L. schizogeneios, P. brevidens, Lycaea nasuta, Lycaea pulex, and Simorhynchotus antennarius increased considerably (261, 39, 31, 68, 416 ind/1000 m3, respectively), indicating occasional utilization of the coastal shelf by pelagic amphipods. Changes in gelatinous populations (medusae, siphonophores, ctenophores, doliolids, and salps) paralleled changes in hyperiid populations, with highest abundances in 2005–2008 in the coastal shelf. Significant correlations of 17 amphipod species with gelatinous taxa, which are often used as host organisms by hyperiid amphipods, suggest that gelatinous presence enhanced hyperiid abundance and promoted the progression of hyperiid amphipods onto the coastal shelf during parts of the 2002–2008 period.

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Variación ambiental y patrones di etarios del erizo negro Tetrapygus niger en costas intermareales rocosas del norte de Chile

Cited by 8 publications

References 14 publications

Caracterización trófica del placóforo intermareal Enoplochiton niger en el norte de Chile: variación ambiental y patrones dietarios a nivel local y region

Caracterización trófica del placóforo intermareal Enoplochiton niger en el norte de Chile: variación ambiental y patrones dietarios a nivel local y region

The temperate marine Peruvian Province: How history accounts for its unusual biota

Hyperiid amphipods from the Gulf of Ulloa and offshore region, Baja California: The possible role of the gelatinous zooplankton as a transport vector into the coastal shelf waters

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