Effects of Submerged Aquatic Vegetation on Macrozoobenthos in a Coastal Lagoon of the Southwestern Atlantic

Arocena, Rodrigo

doi:10.1002/iroh.200610881

Cited by 29 publications

(18 citation statements)

References 41 publications

(29 reference statements)

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“…Such a result could follow simply from overall variation in habitat quality, the birds aggregating at the highest quality ponds. However, our results are based on a model that accounts for all environmental and spatial covariates that we expected to be of major importance (Cramp 1998;Sánchez-Zapata et al 2005;Abellán et al 2006;Arocena 2007;Sebastián-González et al 2010a). Further, the within-year aggregation pattern was evident also in model M2(R), which uses information on the species presence in the previous year, and thus includes an accurate assessment of habitat quality from the species point of view.…”

Section: Discussionmentioning

confidence: 93%

Testing the heterospecific attraction hypothesis with time-series data on species co-occurrence

et al. 2010

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The distributional patterns of actively moving animals are influenced by the cues that the individuals use for choosing sites into which they settle. Individuals may gather information about habitat quality using two types of strategies, either directly assessing the relevant environmental factors, or using the presence of conspecifics or heterospecifics as an indirect measure of habitat quality. We examined patterns of heterospecific attraction with observational time-series data on a community of seven waterbird species breeding in artificial irrigation ponds. We fitted to the data a multivariate logistic regression model, which attributes the presence -absence of each species to a set of environmental and spatial covariates, to the presence of con-and heterospecifics in the previous year and to the presence of heterospecifics in the same year. All species showed a clear tendency to continue breeding in the same sites where they were observed in the previous year. Additionally, the presence of heterospecifics, both in the previous year and in the same year, generally increased the probability that the focal species was found breeding on a given pond. Our data thus give support for the heterospecific attraction hypothesis, though causal inference should be confirmed with manipulative experiments.

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Section: Discussionmentioning

confidence: 93%

Testing the heterospecific attraction hypothesis with time-series data on species co-occurrence

et al. 2010

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“…As a result, channel bottoms are characterized by a dense mat of roots rather than open mud, a characteristic previously observed to affect species abundance and richness in the Delta (Toft et al 2003). Unlike seagrass communities where rooted vascular plants lead to higher infaunal abundance and diversity (Heck 1995;Webster et al 1998;Bostrom and Mattila 1999), increased shoot density or root structure associated with submerged aquatic macrophytes often reduces benthic invertebrate abundance in the substrate (Arocena 2007) by producing heavy detritus loads that, upon decomposition, reduce dissolved oxygen concentrations at the sediment surface (Gordon 1998;Norkko and Bonsdorff 1996). We should note, however, that our sampling methods did not evaluate the epibenthic/epiphytic invertebrate community within SAV shoots and leaves, only sampling the sediment substrate.…”

Section: Benthic and Epibenthic Community Responsementioning

confidence: 99%

Macroinvertebrate Prey Availability and Fish Diet Selectivity in Relation to Environmental Variables in Natural and Restoring North San Francisco Bay Tidal Marsh Channels

Howe¹,

Simenstad²,

Toft³

et al. 2014

SFEWS

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Tidal marsh wetlands provide important foraging habitat for a variety of estuarine fishes. Prey organisms include benthic/epibenthic macroinvertebrates, neustonic arthropods, and zooplankton. Little is known about the abundance and distribution of interior marsh macroinvertebrate communities in the San Francisco Estuary (estuary). We describe seasonal, regional, and site variation in the composition and abundance of neuston and benthic/epibenthic macroinvertebrates that inhabit tidal marsh channels, and relate these patterns to environmental conditions. We also describe spatial and temporal variation in diets of marsh-associated inland silverside, yellowfin goby, and western mosquitofish. Fish and invertebrates were sampled quarterly from October 2003 to June 2005 at six marsh sites located in three river systems of the northern estuary: Petaluma River, Napa River, and the west Delta. Benthic/epibenthic macroinvertebrates and neuston responded to environmental variables related to seasonal changes (i.e., temperature, salinity), as well as those related to marsh structure (i.e., vegetation, channel edge). The greatest variation in abundance occurred seasonally for neuston and spatially for benthic/epibenthic organisms, suggesting that each community responds to different environmental drivers. Benthic/epibenthic invertebrate abundance and diversity was lowest in the west Delta, and increased with increasing salinity. Insect abundance increased during the spring and summer, while Collembolan (springtail) abundance increased during the winter. Benthic/epibenthic macroinvertebrates dominated fish diets, supplemented by insects, with zooplankton playing a minor role. Diet compositions of the three fish species overlapped considerably, with strong selection indicated for epibenthic crustaceans-a surprising result given the typical classification of Menidia beryllina as a planktivore, Acanthogobius flavimanus as a benthic predator, and Gambusia affinis as a larvivorous surface-feeder. Fish diets were influenced by position along the estuarine gradient and season. Overall, our data show that local-scale site effects and marsh position within the estuary influence invertebrate community composition and abundance. Additionally, we show that restoring marsh ecosystems can subsidize fishes similarly to reference marshes. We thus recommend that managers focus on the ability of restoring marshes to produce food subsidies for target species when planning and designing tidal marsh restoration projects, especially those targeted for food web support.

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“…In support of this, we recorded that restored marshes maintain higher diversity, densities and biomass of benthic macroinvertebrates compared to nonrestored marshes (unpublished data). In addition, some macroinvertebrate groups are mainly associated with vegetated areas (Arocena 2007). On the other hand, Ruddy Turnstone showed high densities in restored marshes, which may be related to large numbers of shell fragments that increase the environmental heterogeneity (Whitfield 1990).…”

Section: Discussionmentioning

confidence: 99%

Avian communities inSpartina maritimarestored and non-restored salt marshes

et al. 2013

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Effects of Submerged Aquatic Vegetation on Macrozoobenthos in a Coastal Lagoon of the Southwestern Atlantic

Cited by 29 publications

References 41 publications

Testing the heterospecific attraction hypothesis with time-series data on species co-occurrence

Testing the heterospecific attraction hypothesis with time-series data on species co-occurrence

Macroinvertebrate Prey Availability and Fish Diet Selectivity in Relation to Environmental Variables in Natural and Restoring North San Francisco Bay Tidal Marsh Channels

Avian communities inSpartina maritimarestored and non-restored salt marshes

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