A Possible Effect of Salinity Fluctuation on Abundance of Benthic Vegetation and Associated Fauna in Northeastern Florida Bay

Montague, Clay L.; Ley, Janet A.

doi:10.2307/1352429

Cited by 154 publications

(64 citation statements)

References 24 publications

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“…Only the first of these stressors will be ameliorated by CERP and, therefore, the spoonbill 493 assessment tool only addresses issues for water flow, volume and duration. 494 495 Changes in salinity patterns reduces primary production (through stresses caused 496 by rapid and frequent fluctuations in salinity; Montague and Ley, 1993, Ross et al, 2000, 497 Frezza and Lorenz, 2003 and alter the prey base fish community to a state of lower 498 secondary production (Lorenz, 1999, Lorenz andSerafy, 2006). As a result, the overall 499 abundance of spoonbill prey items is reduced.…”

Section: Prey Community Structure Spoonbills Primarily Feed On Smallmentioning

confidence: 99%

Roseate spoonbill reproduction as an indicator for restoration of the Everglades and the Everglades estuaries

Lorenz¹,

Langan-Mulrooney²,

Frezza³

et al. 2009

Ecological Indicators

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Ecological monitoring is a key part of adaptive management and successful restoration. Not everything within an ecosystem can be monitored so it is important to select indicators that are representative of the system, integrate system responses, show clear responses to system change, can be effectively and efficiently monitored, and are easily communicated. Roseate Spoonbills are one of the indicators that meet these criteria within the Everglades ecosystem. Monitoring of Roseate Spoonbills in Florida Bay over the past 70 years has shown that this species responds to changes in hydrology and corresponding changes in prey abundance and availability. This indicator uses nesting location, nest numbers and nesting success in response to food abundance and availability. In turn, prey abundance is a function of hydrological conditions including depth, and salinity. These relationships have been well documented such that spoonbills responses can be directly related to changes in hydrology and salinity.The spoonbill indicator uses performance measures that have been shown to be both effective and efficient in tracking trends. They are: nesting success, nest number, locations of nests, and prey fish community composition. Targets for these performance measures we established based on previous findings. The performance measures are then reported as suitability indices identified as stoplight colors with green indicating that targets have been met, yellow indicating that conditions are below the target but within a suitable range of it and red indicating the measure is performing poorly in relation to the target.

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Section: Prey Community Structure Spoonbills Primarily Feed On Smallmentioning

confidence: 99%

Roseate spoonbill reproduction as an indicator for restoration of the Everglades and the Everglades estuaries

Lorenz¹,

Langan-Mulrooney²,

Frezza³

et al. 2009

Ecological Indicators

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Section: Introductionmentioning

confidence: 99%

“…) due to natural freshwater inputs or human activities, such as the reduction in freshwater inputs within the coastal lagoons of South Florida as a consequence of the freshwater management practices (Montague and Ley 1993;Hicks et al 1998;Kamermans et al 1999;Irlandi et al 2002;Lirman and Cropper 2003), wastewater disposal, or the development of seawater desalination plants (Tomasko et al 1999). Although most seagrasses can tolerate short-term salinity fluctuations, salinity variations will significantly affect some of the biochemical processes involved in photosynthesis and growth, determining the biomass, distribution, and productivity of these species (Montague and Ley 1993;Hillman et al 1995;Chesnes and Montague 2001). Experimental studies on seagrass tolerance to salinity changes have shown that most species have optimum productivity at around oceanic salinity (Ogata and Matsui 1965;McMillan and Moseley 1967;Biebl and McRoy 1971;Drysdale and Barbour 1975;Hillman et al 1995;Doering and Chamberlain 1998), though some species have optima at lower salinities (Kamermans et al 1999;van Katwijk et al 1999).…”

Section: Introductionmentioning

confidence: 99%

Effects of salinity and possible interactions with temperature and pH on growth and photosynthesis of Halophila johnsonii Eiseman

2005

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The effects of salinity, temperature, and pH variations on growth, survival, and photosynthetic rates of the seagrass Halophila johnsonii Eiseman were examined. Growth and survival responses to salinity were characterized by aquarium experiments in which plants were exposed to seven different salinity treatments (0, 10, 20, 30, 40, 50, and 60 psu) during 15 days. Photosynthetic behavior was assessed for short-term salinity exposures (1 or 20 h) by incubation experiments in biological oxygen demand (BOD) bottles and by measuring photosynthesis versus irradiance (PI) responses in an oxygen electrode chamber. In the bottle experiments the possible effects of interactions between salinity and temperature (15, 25, and 35°C) or pH (5, 6, 7, and 8.2) were also examined. Growth and survival of H. johnsonii were significantly affected by salinity, with maximum rates obtained at 30 psu. Salinity also altered the parameters of the PI curves. Light-saturated photosynthesis (P max ) and the photosynthetic efficiency at subsaturating light (a) increased significantly up to an optimum of 40 psu, decreasing again at the highest salinities. Dark respiration rates and compensating irradiance (I c ) showed minimum values at 40 and 50 psu, while light-saturation point (I k ) was maximum at 30-50 psu. An interaction between salinity and temperature was not found although an increase of temperature alone produced an increase in a, P max , respiration rates, and I k . An interaction between salinity and pH was only found in the P max response: P max increased with pH=5 at 30 psu. In addition, reducing the pH increased a significantly. In the BOD bottles experiment a significant reduction in the dark respiration with decreasing pH was observed, but the opposite trend was observed in the photosynthetic rate. These results suggest that the endemic seagrass H. johnsonii could be negatively affected by hypo-or hypersalinity conditions, although salinity changes did not seem to alter the tolerance of this species to other environmental factors, such as temperature or pH.

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“…Several environmental factors including wind, salinity and vegetation exhibit strong gradients in lagoons due to their proximity to the sea [23]. These gradients generally influence distribution of organisms on the microspatial scale [23] [24].…”

Section: Discussionmentioning

confidence: 99%

“…These gradients generally influence distribution of organisms on the microspatial scale [23] [24]. The similarity in the abundance, diversity, and community composition of insects among the lagoon's source, middle and mouth as well as its shoreline, intertidal area and the dry grassy terrestrial areas are indications that the distribution of insects on the spatial scale might not be affected by these gradients.…”

Section: Discussionmentioning

confidence: 99%

Distribution and Forage Potential of Some Insect Taxa Sampled with Sweep Nets in the Flood Plains of a Coastal Ramsar Site in Ghana

Gbogbo¹,

Yeboah²,

Billah³

2014

OJE

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Wetland insect communities are an important food source for waterbirds. Yet studies on insect communities in West African coastal wetlands-a major foraging area for wintering waterbirds of the East Atlantic and Mediterranean flyways-are generally limited. This study investigated the forage potential, micro-spatial and temporal distribution of insects swept from air and low vegetation in Sakumo II-a coastal Ramsar site in Ghana. Insects of the families Thripidae, Coccinellidae, Tetrigidae and Acrididae dominated the wetland. Based on prey yield and abundance, Acrididae, Coccinellidae and Tetrigidae appeared to be most promising source of food for waterbirds. Despite the high abundance of Thripidae, their low per capita biomass rendered them a less promising food source particularly to large sized waterbird species. Spatial and temporal abundance and distributions of insects along both the latitudinal and longitudinal axes of the lagoon were non-significant. In recognition of the diversity and abundance of insects on the wetland, there is the need to investigate the disparity in the utilisation of the various taxa by waterbird species.

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A Possible Effect of Salinity Fluctuation on Abundance of Benthic Vegetation and Associated Fauna in Northeastern Florida Bay

Cited by 154 publications

References 24 publications

Roseate spoonbill reproduction as an indicator for restoration of the Everglades and the Everglades estuaries

Roseate spoonbill reproduction as an indicator for restoration of the Everglades and the Everglades estuaries

Effects of salinity and possible interactions with temperature and pH on growth and photosynthesis of Halophila johnsonii Eiseman

Distribution and Forage Potential of Some Insect Taxa Sampled with Sweep Nets in the Flood Plains of a Coastal Ramsar Site in Ghana

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