Food Web Structure and Habitat Connectivity in Fish Estuarine Nurseries—Impact of River Flow

Vinagre, Catarina; Salgado, Jéssica Waleska; Cabral, Henrique N.; Costa, M. J.

doi:10.1007/s12237-010-9315-0

Cited by 82 publications

(51 citation statements)

References 58 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…On the other hand, it would be wise to direct some future research in Florida estuaries to nutrient inputs in freshwater inflows and associated food web models (Vinagre et al. ). However, this is not a practical method for water managers to presently use in setting MFLs.…”

Section: Discussionmentioning

confidence: 99%

Modeling and Mapping to Assess Spatial Distributions and Population Numbers of Fish and Invertebrate Species in the Lower Peace River and Charlotte Harbor, Florida

et al. 2019

View full text Add to dashboard Cite

Catch per unit effort (CPUE) was computed from fisheries‐independent monitoring data collected from 1996 through 2013 in the lower Peace River and Charlotte Harbor, Florida. Seasonal habitat suitability modeling (HSM) based on delta‐gamma generalized additive models was prepared for eight fish and invertebrate species life stages with affinities for either low or moderate salinities. Using a geographic information system, habitat maps were created from monitoring data for temperature, salinity, dissolved oxygen, depth, and bottom type in the study area. Gear‐corrected CPUEs derived from HSM were applied to corresponding habitat grid cells. Seasonal HSM maps were then created, depicting the spatial distribution and relative abundance for early juvenile, juvenile, and adult life stages. By overlaying Optimum abundance zones from each HSM map onto corresponding salinity grids, the preferred ranges of salinity were found to be similar between seasons for each of six estuarine‐resident species life stages. This implies that each resident species occupies a unique salinity range in the river and estuary, which varies little between seasons. During the summer wet season, the geographic ranges occupied by each resident species life stage expanded in response to increased inflow, while the preferred salinity ranges occupied were similar between seasons. However, this was not the case for the two estuarine‐transient species (Red Drum Sciaenops ocellatus and Spot Leiostomus xanthurus), which tended to utilize different salinity ranges between seasons. Habitat‐based population estimates were prepared for each species life stage by using the predicted CPUE grids used to create the HSM maps. The demonstrated methods support ecosystem‐based fishery management and management of freshwater inflow to tidal rivers.

show abstract

Section: Discussionmentioning

confidence: 99%

Modeling and Mapping to Assess Spatial Distributions and Population Numbers of Fish and Invertebrate Species in the Lower Peace River and Charlotte Harbor, Florida

et al. 2019

View full text Add to dashboard Cite

show abstract

“…These approaches are, however, restricted by technical problems: a large number of samples are required because of extremely high variability, which is mainly due to variable digestion and assimilation rates among prey organisms. For the past three decades, stable isotope analysis has been increasingly used in food web studies because it provides information on the relative importance of each source (Fry and Sherr 1989), as well as direct estimates of the prey assimilated (Peterson, Howarth, and Garrit 1985;Kwak and Zedler, 1997;Riera et al 1999;Vinagre et al 2008Vinagre et al , 2011. Several authors (DeNiro and Epstein 1978;1981;Post 2002;Vander Zanden and Vadeboncoeur 2002) suggest that d 15 N in consumer species was enriched about 3-4%, whereas little or no trophic level enrichment of d 13 C was noted in samples.…”

Section: Introductionmentioning

confidence: 99%

An Assessment of Sample Preservation Methods for the Determination of Stable Carbon and Nitrogen Isotope Ratios in Mollusks

Liu

et al. 2013

Analytical Letters

View full text Add to dashboard Cite

The aim of this study was to quantify the effects of preservation methods and preservation times on the stable carbon and nitrogen isotope values in the tissues of six mollusk species (Mytilus edulis, Crassostrea gigas, Ruditapes philippinarum, Acanthochiton seulschnochilon, Littorina brevicula, and Rapana venosa). To identify potential preservation effects on d 13 C and d 15 N values and to examine temporal changes in the effects of preservation, repeated analyses were carried out after 1 day, 5 days, 15 days, 1 month, 3 months, 6 months, and 12 months of preservation. The results showed that drying preservation was the most suitable method for preserving samples, while freezing and chemical preservation significantly affected the stable isotope values compared with those of the controls. The effects of preservatives on the tissues of different mollusk species were statistically significant for both d 13 C and d 15 N values. Shifts in the d 13 C and d 15 N values, due to freezing and chemical preservation, were higher in Acanthochiton seulschnochilon, Littorina brevicula, and Rapana venosa than in the other three species. The effects of preservatives on carbon isotope values were variable. In most cases, the shift of the d 13 C values from the control samples were less than 1% for those of the treated samples. The d 13 C and d 15 N data from the preserved samples could thus be used in food web reconstruction studies. Further studies will be necessary, however, in order to elucidate the effects of preservation type and time on other species.

show abstract

“…Others have similarly documented complementary diet contributions between marsh‐derived OM and marine phytoplankton, noting increased marsh support in the upper regions of estuaries or during years of high river discharge (Kasai and Nakata , Vinagre et al. ). Additionally, increased δ 13 C enrichment (indicative of terrestrial OM sources) of surface sediments and benthic macrofauna has been observed in estuaries of large watersheds (Sakamaki et al.…”

Section: Discussionmentioning

confidence: 93%

Detrital shadows: estuarine food web connectivity depends on fluvial influence and consumer feeding mode

Howe

Simenstad

Ogston

2017

Ecological Applications

View full text Add to dashboard Cite

We measured the influence of landscape setting on estuarine food web connectivity in five macrotidal Pacific Northwest estuaries across a gradient of freshwater influence. We used stable isotopes (δ C, δ N, δ S) in combination with a Bayesian mixing model to trace primary producer contributions to suspension- and deposit-feeding bivalve consumers (Mytilus trossulus and Macoma nasuta) transplanted into three estuarine vegetation zones: emergent marsh, mudflat, and eelgrass. Eelgrass includes both Japanese eelgrass (Zostera japonica) and native eelgrass (Zostera marina). Fluvial discharge and consumer feeding mode strongly influenced the strength and spatial scale of observed food web linkages, while season played a secondary role. Mussels displayed strong cross-ecosystem connectivity in all estuaries, with decreasing marine influence in the more fluvial estuaries. Mussel diets indicated homogenization of detrital sources within the water column of each estuary. In contrast, the diets of benthic deposit-feeding clams indicated stronger compartmentalization in food web connectivity, especially in the largest river delta where clam diets were trophically disconnected from marsh sources of detritus. This suggests detritus deposition is patchy across space, and less homogenous than the suspended detritus pool. In addition to fluvial setting, other estuary-specific environmental drivers, such as marsh area or particle transport speed, influenced the degree of food web linkages across space and time, often accounting for unexpected patterns in food web connectivity. Transformations of the estuarine landscape that alter river hydrology or availability of detritus sources can thus potentially disrupt natural food web connectivity at the landscape scale, especially for sedentary organisms, which cannot track their food sources through space.

show abstract

Food Web Structure and Habitat Connectivity in Fish Estuarine Nurseries—Impact of River Flow

Cited by 82 publications

References 58 publications

Modeling and Mapping to Assess Spatial Distributions and Population Numbers of Fish and Invertebrate Species in the Lower Peace River and Charlotte Harbor, Florida

Modeling and Mapping to Assess Spatial Distributions and Population Numbers of Fish and Invertebrate Species in the Lower Peace River and Charlotte Harbor, Florida

An Assessment of Sample Preservation Methods for the Determination of Stable Carbon and Nitrogen Isotope Ratios in Mollusks

Detrital shadows: estuarine food web connectivity depends on fluvial influence and consumer feeding mode

Contact Info

Product

Resources

About