Interaction strength varies in relation to tidal gradient and spatial heterogeneity in an intertidal Southwest Atlantic estuarine food web

Álvarez, María Fernanda; Montemayor, Diana I.; Bazterrica, María Cielo; Addino, Mariana; Fanjul, Eugenia; Iribarne, Oscar; Botto, Florencia

doi:10.1016/j.jembe.2013.09.014

Cited by 7 publications

(2 citation statements)

References 83 publications

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“…As crabs move to lower-root habitat structure to avoid detection from wading birds, they may become prey for visual fish predators. The strength of this and similar interactions should vary depending on the spatial and temporal distribution of prey and predators (Alvarez et al 2013) throughout an estuary with implications for top-down trophic effects.…”

Section: Temporal-niche Partitioningmentioning

confidence: 99%

Artificial Lighting at Night in Estuaries—Implications from Individuals to Ecosystems

Zapata

Sullivan

Gray

2018

Estuaries and Coasts

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Artificial lighting at night (ALAN) produced by urban, industrial, and roadway lighting, as well as other sources, has dramatically increased in recent decades, especially in coastal environments that support dense human populations. Artificial Blightscapes^are characterized by distinct spatial, temporal, and spectral patterns that can alter natural patterns of light and dark with consequences across levels of biological organization. At the individual level, ALAN can elicit a suite of physiological and behavioral responses associated with light-mediated processes such as diel activity patterns and predator-prey interactions. ALAN has also been shown to modify community composition and trophic structure, with implications for ecosystem-level processes including primary productivity, nutrient cycling, and the energetic linkages between aquatic and terrestrial systems. Here, we review the state of the science relative to the impacts of ALAN on estuaries, which is an important step in assessing the long-term sustainability of coastal regions. We first consider how multiple properties of ALAN (e.g., intensity and spectral content) influence the interaction between physiology and behavior of individual estuarine biota (drawing from studies on invertebrates, fishes, and birds). Second, we link individual-to community-and ecosystem-level responses, with a focus on the impacts of ALAN on food webs and implications for estuarine ecosystem functions. Coastal aquatic communities and ecosystems have been identified as a key priority for ALAN research, and a cohesive research framework will be critical for understanding and mitigating ecological consequences.

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Section: Temporal-niche Partitioningmentioning

confidence: 99%

Artificial Lighting at Night in Estuaries—Implications from Individuals to Ecosystems

Zapata

Sullivan

Gray

2018

Estuaries and Coasts

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“…There are several studies not focused on the local meiofauna, but on some ecological process that may affect it, and hence provide an accessory description of it. In salt marshes, such studies have been carried out in southern Brazil (32°02' S -52°05' W) (Rosa and Bemvenuti 2005b), in Mar Chiquita (37°44' S -57°25' W), Argentina (Botto and Iribarne 1999; Alvarez et al 2013;Alvarez et al 2015), and in Bahía Blanca (38°47' S -62°17' W), Argentina (Escapa et al 2008).…”

Section: ₈₅₃ I��mentioning

confidence: 99%

Littoral meiofauna community structure in San Julián bay, Santa Cruz province, Argentina

Lo Russo,

Pastor de Ward,

Zaixso

2023

Ecol Austral

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For the first time, standing stocks and community structure have been reported in San Julián Bay, located in the Santa Cruz province, toward the southern tip of South America, within the sub-Antarctic region. The mean density of the meiofauna found was 6724 individuals/10 cm2, with a high dominance of nematodes (97.69%). Multivariate studies (PERMANOVA) revealed two distinct meiofauna assemblages: one, in an upper littoral salt marsh habitat and other, in a medium to low soft bare sediment. In the middle of the bay —in front of San Julián city— salt marsh habitats had the highest meiofaunal density, while bare sediments (medium-low levels) were the lowest. The mean average in the salt marsh area was 12246 individuals/10 cm2, with nematodes being dominant followed by oligochaetes as the subdominant taxa. The mean average in bare sediments (medium to low levels) was 3962 individuals/10 cm2, with nematodes as dominant and turbellarians, mastigophorans and maxillopodos (harpacticoid copepods) as subdominant taxa. Bare sediments related to Patagonian mussel’s populations presented the lowest meiofauna densities. Diversity showed an opposite trend, with a maximum in medium-low levels and a minimum in salt-marshes habitat. Richness in number of taxa ranged from 8 to 12, with a total number of 18 taxa. Despite dominance of nematodes in meiofauna assemblages is known, maximum density found in San Julián bay is much higher than previously found for estuaries from north and mid-latitudes littoral sandy beaches and in the nearby region of the Straits of Magellan and Beagle Channel and other sub-Antarctic and Antarctic sites. On the other hand, the number of meiofauna taxa (no nematodes) is low, and its community structure differs from what has been reported in previous studies. The meiofauna taxa assemblages provide evidence that, in salt-marsh habitats, they have the highest densities, but the lowest diversity when compared with lower levels. This is likely due to adaptation problems of meiofauna communities to a semi-terrestrial habitat.

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Predation and interaction strength of octopuses and sea stars on different functional groups of the rocky intertidal shores of the Patagonian coast

et al. 2019

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Interaction strength varies in relation to tidal gradient and spatial heterogeneity in an intertidal Southwest Atlantic estuarine food web

Cited by 7 publications

References 83 publications

Artificial Lighting at Night in Estuaries—Implications from Individuals to Ecosystems

Artificial Lighting at Night in Estuaries—Implications from Individuals to Ecosystems

Littoral meiofauna community structure in San Julián bay, Santa Cruz province, Argentina

Predation and interaction strength of octopuses and sea stars on different functional groups of the rocky intertidal shores of the Patagonian coast

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