The Effect of Freshwater Inflow on Meiofaunal and Macrofaunal Populations in the Guadalupe and Nueces Estuaries, Texas

Montagna, Paul A.; Kalke, Richard D.

doi:10.2307/1352779

Cited by 164 publications

(95 citation statements)

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“…The volume and timing of freshwater inflow typically influence nutrient and sediment loading into estuaries, affecting ecosys tem communities (Sklar and Browder, 1998;Kimmerer, 2002). During periods of reduced freshwater inflow or drought, pri mary production and the trophic structure in estuarine systems can be altered as a result of changes in salinity, nutrient load ing, or increased light penetration from reduced sediment input (Montagna and Kalke, 1992;Livingston and others, 1997). Reduced sediment supply can also result in degradation and morphologic shifts in deltaic environments (Yang and Others, 2011), particularly when coupled with erosion, sea level rise (Lester and Gonzalez, 2011), and subsidence (Kennish, 2002).…”

Section: Introductionmentioning

confidence: 99%

Characterization of streamflow, suspended sediment, and nutrients entering Galveston Bay from the Trinity River, Texas, May 2014–December 2015

Lucena¹,

Lee²

2017

Scientific Investigations Report

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For more information on the USGS-the Federal source for science about the Earth, its natural and living resources, natural hazards, and the environment-visit http://www.usgs.gov or call 1-888-ASK-USGS.For an overview of USGS information products, including maps, imagery, and publications, visit http://store.usgs.gov.Any use of trade, firm, or product names is for descriptive purposes only and does not imply endorsement by the U.S. Government.Although this information product, for the most part, is in the public domain, it also may contain copyrighted materials as noted in the text. Permission to reproduce copyrighted items must be secured from the copyright owner. DatumHorizontal coordinate information is referenced to the North American Datum of 1983 (NAD 83) and the North American Datum of 1927 (NAD 27). Supplemental InformationSpecific conductance is given in microsiemens per centimeter at 25 degrees Celsius (µS/cm at 25 °C).Concentrations of chemical constituents in water are given in milligrams per liter (mg/L). AbstractThe U.S. Geological Survey (USGS), in cooperation with the Texas Water Development Board and the Galveston Bay Estuary Program, collected streamflow and water-quality data at USGS streamflow-gaging stations in the lower Trinity River watershed from May 2014 to December 2015 to characterize and improve the current understanding of the quantity and quality of freshwater inflow entering Galveston Bay from the Trinity River. Continuous streamflow records at four USGS streamflow-gaging stations were compared to quantify differences in streamflow magnitude between upstream and downstream reaches of the lower Trinity River. Water-quality conditions were characterized from discrete nutrient and sedi ment samples collected over a range of hydrologic conditions at USGS streamflow-gaging station 08067252 Trinity River at Wallisville, Tex. (hereinafter referred to as the "Wallisville site"), approximately 4 river miles upstream from where the Trinity River enters Galveston Bay.Based on streamflow records, annual mean outflow from Livingston Dam into the lower Trinity River was 2,240 cubic feet per second (ft 3 /s) in 2014 and 22,400 ft 3 /s in 2015, the second lowest and the highest, respectively, during the entire period of record . During this study, only about 54 percent of the total volume measured at upstream sites was accounted for at the Wallisville site as the Trinity River enters Galveston Bay. This difference in water volumes between upstream sites and the Wallisville site indicates that at high flows a large part of the volume released from Lake Livingston does not reach Galveston Bay through the main channel of the Trinity River. These findings indicate that water likely flows into wetlands and water bodies surrounding the main channel of the Trinity River before reaching the Wallisville site and is being stored or discharged through other channels that flow directly into Galveston Bay.To characterize suspended-sediment concentrations and loads in Trinity River inflow to Galveston Bay, ...

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Section: Introductionmentioning

confidence: 99%

Characterization of streamflow, suspended sediment, and nutrients entering Galveston Bay from the Trinity River, Texas, May 2014–December 2015

Lucena¹,

Lee²

2017

Scientific Investigations Report

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“…Higher diversity and abundance of benthic organisms can be found in the seabed zones less impacted by trawling activities (Kaiser et al, 1999;Demestre et al, 2000a;Eleftheriou, 2000;Smith et al, 2000;Sánchez et al, 2000). Furthermore, freshwater inflow is known to enhance benthic productivity in coastal areas (Montagna and Yoon, 1991;Montagna and Kalke, 1992;Salen-Picard et al, 1997;Massé, 2000). In the northwestern Mediterranean, a positive response of benthic populations-particularly polychaetes-to river runoff has been shown (Salen-Picard et al, 1997;Massé, 2000).…”

Section: Introductionmentioning

confidence: 99%

Lipid reserves of red mullet (<i>Mullus barbatus</i>) during pre-spawning in the northwestern Mediterranean

Lloret¹,

Demestre²,

Sánchez-Pardo³

2007

Sci. Mar.

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SUMMARY: Lipid reserves are a particularly important attribute of fishes because they have a large influence on growth, reproduction and survival. This study analyses the lipid content of red mullet (Mullus barbatus) pre-spawners in three different areas of the northwestern Mediterranean in relation to trawling activities and river runoff. The muscle lipid was considered as an indicator of the somatic condition of individuals whilst the gonad lipid was used as a proxy of the energy invested in reproduction. The results show that fish with the highest muscle lipid levels inhabited the area where fishing impact was lowest. Since the abundance and biomass of polychaetes, which represent the main food source for red mullet, were found to be lower in trawled zones than in unfished ones, we suggest that differences in the muscle lipid levels between areas might be attributed to variation in prey abundance in relation to fishing impact. However, no impact of river runoff on lipid reserves of red mullet was observed. The results also show that muscle and gonad lipid reserves are not related to each other during pre-spawning.Keywords: ecological physiology, polychaetes, fishing, river runoff, maerl beds. RESUMEN: RESERVAS LIPIDICAS DEL SALMONETE DE FANGO (MULLUS BARBATUS)DURANTE LA PREPUESTA EN EL MEDITERRÀNEO NOROCCIDENTAL. -Las reservas lipídicas constituyen un importante atributo de los peces porque juegan un papel destacado en su crecimiento, reproducción y supervivencia. Este estudio analiza las reservas lipídicas del salmonete de fango (Mullus barbatus) durante la prepuesta en tres áreas diferentes del Mediterráneo noroccidental en relación a la actividad pesquera y las descargas fluviales. Se ha considerado el contenido lipídico en el músculo y en la gónada como indicadores de la condición somática y de la energía invertida en la reproducción de los individuos respectivamente. Los resultados muestran cómo los peces con una cantidad mayor de lípidos en el músculo habitan el área donde el impacto pesquero es menor. Puesto que la abundancia y la biomasa de poliquetos, que constituyen la principal fuente de alimento del salmonete de fango, son inferiores en las zonas afectadas por el arrastre que en las zonas donde no se practica este tipo de pesca, se sugiere que las diferencias en la cantidad de lípidos en el músculo entre las distintas áreas podrían atribuirse a las diferencias en la abundancia de presas, lo cual podría guardar relación con la actividad pesquera. Sin embargo, no se observa impacto alguno de las descargas fluviales sobre las reservas de lípidos del salmonete de fango. Los resultados también muestran cómo los contenidos lipídicos en el músculo y en la gónada de los ejemplares no están relacionados entre sí durante la prepuesta de la especie.Palabras clave: ecofisiología, poliquetos, pesquerías, descargas fluviales, fondos de maerl.

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“…In other systems where freshwater discharge has altered temperature, salinity and nutrient regimes investigators have observed significant changes in feeding and mortality of grazers (Irlandi et al 1997); composition of meiofaunal (Montagna & Kalke 1992) and macrofaunal communities (Lercari & Defeo 1999; and abundance and distribution of nekton and hyperbenthos (Attrill & Power 2000, Drake et al 2002. Within these studies, investigators observed effects of the magnitude and timing of salinity fluctuations (e.g.…”

Section: Introductionmentioning

confidence: 99%

Effects of freshwater input on shallow-water infaunal communities in Doubtful Sound, New Zealand

Rutger¹,

Wing²

2006

Mar. Ecol. Prog. Ser.

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Infaunal community structure is sensitive to both the range of salinity values and timing of exposure wrought by the time course and magnitude of freshwater input to estuaries. We sampled macro-infauna (>1 mm) from soft sediment habitat at 8 shallow sites (2 m below MHW; mean high water) within 4 regions in the Doubtful-Thompson Sound complex, a fjord in southwestern New Zealand. This fjord receives a large influx of freshwater from natural and anthropogenic sources that form a distinct low salinity surface layer and drive mean estuarine circulation. Shallow water soft sediment habitat in the fjord is highly fragmented and subject to strong environmental gradients shaped by freshwater input patterns. Infaunal community structure in the inner region of Doubtful Sound was consistently different from other regions of the fjord. This was evidenced by a low abundance of bivalves, decapods, and polychaetes in the family Orbiniidae, and elevated abundance of amphipods and polychaetes in the family Neredidae. An analysis of taxonomic richness among regions revealed that the inner regions of Doubtful Sound are also the least rich in the complex. Both taxonomic richness and patterns in abundance of the major taxa covary with physical information on the return times for low salinity events, thickness, and patterns in mixing in the freshwater layer. These results are consistent with a large impact of the persistent discharge of freshwater from the Manapouri power station on shallow water infaunal communities in the fjord. The loss of bivalves in particular has large implications for patterns in food-web structure and function in this system. KEY WORDS: Fjord · Infauna · Diversity · SalinityResale or republication not permitted without written consent of the publisher

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The Effect of Freshwater Inflow on Meiofaunal and Macrofaunal Populations in the Guadalupe and Nueces Estuaries, Texas

Cited by 164 publications

References 8 publications

Characterization of streamflow, suspended sediment, and nutrients entering Galveston Bay from the Trinity River, Texas, May 2014–December 2015

Characterization of streamflow, suspended sediment, and nutrients entering Galveston Bay from the Trinity River, Texas, May 2014–December 2015

Lipid reserves of red mullet (<i>Mullus barbatus</i>) during pre-spawning in the northwestern Mediterranean

Effects of freshwater input on shallow-water infaunal communities in Doubtful Sound, New Zealand

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