Improved coastal hydrodynamic model offers insight into surface and groundwater flow and restoration objectives in Biscayne Bay, Florida, USA

Stabenau, Erik; Renshaw, Amy; Luo, Jiangang; Kearns, Edward J.

doi:10.5343/bms.2015.1017

Cited by 6 publications

(5 citation statements)

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“…Spatial pink shrimp density patterns from Black Point to Convoy Point ( Fig 1 ) were represented by membership in one low density site cluster (cluster 1) and one intermediate density site cluster (cluster 2). This zone is strongly influenced by canal discharges [ 11 , 23 – 26 , 33 , 68 ]. Both rapid (<60 min to 2 d) and extreme (~25 ppt) salinity reductions can occur along this stretch of coastline [ 22 , 24 , 25 , 29 , 69 , 70 ].…”

Section: Discussionmentioning

confidence: 99%

Pink shrimp Farfantepenaeus duorarum spatiotemporal abundance trends along an urban, subtropical shoreline slated for restoration

et al. 2018

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The Biscayne Bay Coastal Wetlands (BBCW) project of the Comprehensive Everglades Restoration Plan (CERP) aims to reduce point-source freshwater discharges and spread freshwater flow along the mainland shoreline of southern Biscayne Bay. These actions will be taken to approximate conditions in the coastal wetlands and bay that existed prior to construction of canals and water control structures. An increase in pink shrimp (Farfantepenaeus duorarum) density to ≥ 2 individuals m-2 during the wet season (i.e., August-October) along the mainland shoreline was previously proposed as an indication of BBCW success. This study examined pre-BBCW baseline densities and compared them with the proposed target. Densities were monitored by seasonal (wet, dry) throw-trapping (1 m2 replicated in triplicate) at 47 sites along ~22 km of the southwestern Biscayne Bay coastline over 10 years (2007–2016). Densities varied across years and were most often higher in dry seasons. Quantile regression revealed density limitation by four habitat attributes: water temperature (°C), depth (m), salinity (ppt), and submerged aquatic vegetation (SAV: % cover). Procrustean analyses that tested for concordance between the spatial and temporal distributions of shrimp densities and habitat metrics found that water temperature, water depth, and salinity explained ~ 28%, 28%, and 22% of density variability, respectively. No significant relationship with SAV was observed. Hierarchical clustering was used to identify spatially and temporally similar groupings of pink shrimp densities by sites or season-years. Significant groupings were then investigated with respect to potentially limiting habitat attributes. Six site and four year-season clusters were identified. Although habitat attributes significantly differed among spatial clusters, within-cluster median pink shrimp densities did not correlate with within-cluster minima, maxima, medians, or standard deviations of habitat attributes. Overall, pink shrimp density ( = 0.86, SD = 1.32 shrimp m-2) was significantly lower (t(α = 0.10,2),939 = -26.53, P <0.0001) than the 2 shrimp m-2 CERP Interim Goal target. Pink shrimp density corresponded significantly with salinity and appeared limited to density < 2 shrimp m-2 by salinity < ~18 ppt. Salinity is an environmental attribute that will be directly influenced by CERP implementation.

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Section: Discussionmentioning

confidence: 99%

Pink shrimp Farfantepenaeus duorarum spatiotemporal abundance trends along an urban, subtropical shoreline slated for restoration

et al. 2018

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“…1) were dominated by membership within one low density site cluster (cluster 1) and one intermediate density site cluster (cluster 2). This zone is strongly influenced by canal discharges [11,23–26,33,68]. Both rapid (<60 min to 2 d) and extreme (~25 ppt) salinity reductions can occur along this stretch of coastline [22,24,25,29,69,70].…”

Section: Discussionmentioning

confidence: 99%

Pink ShrimpFarfantepenaeus duorarumSpatiotemporal Abundance Trends Along an Urban, Subtropical Shoreline Slated for Restoration

Zink

Browder

Lirman

et al. 2018

Preprint

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23The Biscayne Bay Coastal Wetlands (BBCW) project of the Comprehensive Everglades 24 Restoration Plan (CERP) aims to reduce point-source freshwater discharges and spread 25 freshwater flow along the mainland shoreline of southern Biscayne Bay to approximate 26 conditions in the coastal wetlands and bay that existed prior to construction of canals and water 27 control structures. An increase in pink shrimp (Farfantepenaeus duorarum) density to ≥ 2 28 individuals m -2 during the wet season (i.e., August-October) along the mainland shoreline was 29 previously proposed as an indicator of BBCW success. This study examined pre-BBCW baseline 30 densities and compared them with the proposed target. Densities were monitored by seasonal 31 (wet, dry) throw-trapping (1 m 2 replicated in triplicate) at 47 sites along ~22 km of the 32 southwestern Biscayne Bay coastline over 10 years (2007)(2008)(2009)(2010)(2011)(2012)(2013)(2014)(2015)(2016). Densities varied across years 33 and were most often higher in dry seasons. Quantile regression revealed density limitation by 34 four habitat attributes: water temperature (°C), depth (m), salinity (ppt), and submerged aquatic 35 vegetation (SAV: % cover). Procrustean analyses that tested for congruence between shrimp 36 densities and habitat metrics found that water temperature, water depth, and salinity explained ~ 37 28%, 28%, and 22% of density variability, respectively. No significant relationship with SAV 38 was observed. Hierarchical clustering was used to identify spatially and temporally similar 39 groupings of pink shrimp densities by sites or season-years. Significant groupings were later 40 investigated with respect to potentially limiting habitat attributes. Six site and four year-season 41 clusters were identified. Although habitat attributes significantly differed among spatial clusters, 42 within-cluster median pink shrimp densities did not correlate with within-cluster minima, 43 maxima, medians, or standard deviations of habitat attributes. Pink shrimp densities 44 corresponded significantly with salinity and appeared limited by it. Salinity is an environmental 45 attribute that will be directly influenced by CERP implementation. 46 47 48Biscayne Bay is a coastal lagoon located adjacent to the city of Miami, Florida, USA. Its 49 watershed was heavily modified during the 20 th century and is currently highly managed to 50 prevent urban, suburban, and agricultural flooding while also meeting agricultural, commercial, 51 and residential freshwater demands. The Comprehensive Everglades Restoration Plan (CERP) 52 seeks to restore the quality, quantity, timing, and distribution of freshwater deliveries to southern 53 Florida nearshore areas [1], including Biscayne Bay. The Biscayne Bay Coastal Wetlands 54 (BBCW) project, a CERP component, aims to restore a more natural hydrology and salinity 55 regime along the western bay's southwestern shoreline [2,3]. Three actions are needed to make 56 this improvement: (1) increasing the total volume of freshwater deli...

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“…Mean seasonal salinity values in the north region of Biscayne Bay, during a 4‐year period (2005–2009), were 25.0‰ (wet season) and 30.4‰ (dry season), dropping below 10‰ during heavy precipitation events (Stabenau et al. ). Annual extreme T/S conditions were less variable at exposed (e.g., 20–32°C; 32–39‰) than protected sites (e.g., 16–34°C; 30–41‰).…”

Section: Methodsmentioning

confidence: 99%

“…Mean monthly temperature/salinity (T/S) conditions are less variable annually at exposed octocoral sites subject predominantly to northerly Florida Current flow than at sheltered biofouling community sites that are influenced by freshwater input from runoff, canal effluents, and groundwater discharge (Glynn et al 2017). Mean seasonal salinity values in the north region of Biscayne Bay, during a 4-year period (2005)(2006)(2007)(2008)(2009), were 25.0& (wet season) and 30.4& (dry season), dropping below 10& during heavy precipitation events (Stabenau et al 2015). Annual extreme T/S conditions were less variable at exposed (e.g., 20-32°C; 32-39&) than protected sites (e.g., 16-34°C; 30-41&).…”

Section: Species and Study Sitesmentioning

confidence: 99%

Benthic ctenophores (Platyctenida: Coeloplanidae) in South Florida: predator–prey interactions

Glynn

Coffman

Primov

et al. 2018

Invertebrate Biology

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The primary goal of this study was to demonstrate, from field observations and laboratory experiments, some key trophic roles of benthic ctenophores as predators and prey in subtropical communities. We examined individuals of two benthic platyctenid species: Coeloplana waltoni, a minute epibiont on octocorals in exposed, open‐water settings; and Vallicula multiformis, an associate of calm‐water biofouling communities and floating Sargassum spp. Laboratory observations of individuals of both ctenophore species revealed frequent capture and ingestion of diverse zooplankton taxa, especially crustaceans. Laboratory predation trials demonstrated the capture of dolphinfish (Coryphaena hippurus) eggs and larvae by both ctenophore species. Dolphinfish eggs and larvae larger than individuals of C. waltoni were captured but not ingested during 2‐h trial periods. These prey items were sometimes purloined and ingested by polyps of the ctenophore's octocoral host. Ingestion of dolphinfish eggs and larvae by individuals of C. waltoni was observed, however, after longer periods of exposure to prey. In predation trials, dolphinfish eggs and larvae were both captured and ingested by larger individuals of the ctenophore species V. multiformis. Field and laboratory observations revealed diverse invertebrate and fish taxa that prey on both ctenophore species. In the laboratory, the mean daily per capita consumption of individuals of C. waltoni by a pomacanthid fish ranged 0.5–2.8 individuals, and ranged 2.6–3.6 individuals for predation by an ovulid mollusc. Field population densities of these predators ranged 0.1–0.7 individuals per m2 for the pomacanthid, and 0.2–1.1 individuals per m2 for the mollusc. Laboratory feeding observations demonstrated frequent consumption of individuals of V. multiformis by a sea anemone, and by three species of brachyuran crabs. Field observations revealed eight fishes that probably feed incidentally on individuals of V. multiformis. These findings add to the limited knowledge base of predator–prey dynamics in both C. waltoni and V. multiformis.

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Improved coastal hydrodynamic model offers insight into surface and groundwater flow and restoration objectives in Biscayne Bay, Florida, USA

Cited by 6 publications

References 0 publications

Pink shrimp Farfantepenaeus duorarum spatiotemporal abundance trends along an urban, subtropical shoreline slated for restoration

Pink shrimp Farfantepenaeus duorarum spatiotemporal abundance trends along an urban, subtropical shoreline slated for restoration

Pink ShrimpFarfantepenaeus duorarumSpatiotemporal Abundance Trends Along an Urban, Subtropical Shoreline Slated for Restoration

Benthic ctenophores (Platyctenida: Coeloplanidae) in South Florida: predator–prey interactions

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