Un sistema di esposizione di flusso-through per valutare sospeso Sedimenti Effetti sulla vita acquatica
Summary
A robust and flexible flow-through exposure system designed to maintain sediment in suspension is presented. The system is used to investigate the effects of suspended sediment on various aquatic species and life stages in the laboratory.
Abstract
This paper describes the Fish Larvae and Egg Exposure System (FLEES). The flow-through exposure system is used to investigate the effects of suspended sediment on various aquatic species and life stages in the laboratory by using pumps and automating delivery of sediment and water to simulate suspension of sediment. FLEES data are used to develop exposure-response curves between the effects on aquatic organisms and suspended sediment concentrations at the desired exposure duration. The effects data are used to evaluate management practices used to reduce the interactions between aquatic organisms and anthropogenic causes of suspended sediments. The FLEES is capable of generating total suspended solids (TSS) concentrations as low as 30 to as high as 800 mg/L, making this system an ideal choice for evaluating the effects of TSS resulting from many activities including simulating low ambient levels of TSS to evaluating sources of suspended sediments from dredging operations, vessel traffic, freshets, and storms.
Introduction
operazioni di dragaggio utilizzano metodi meccanici per rimuovere sedimenti del fondo di porti e canali di navigazione. Durante la rimozione, una parte del sedimento disturbato è sospeso nella colonna d'acqua, potenzialmente rendendo questa fonte di stress fisico per specie acquatiche. Oltre alla sospensione, il sedimento può essere trasportato dalla chiatta da condizioni ambientali prima sedimentazione della colonna d'acqua. La combinazione di questi due meccanismi significa che un organismo acquatico verificano vicino da un draga operativo può essere esposto a sedimenti in sospensione e soffrire effetti avversi. Per far fronte a tali preoccupazioni, finestre ambientali (restrizioni di dragaggio stagionale) sono abitualmente utilizzati come una pratica di gestione per ridurre o eliminare il rischio di effetti potenzialmente nocivi di sedimenti in sospensione dalle attività di dragaggio sulle risorse acquatiche 1,2.
finestre ambientali sono più comunemente stabiliti per proteggere in via di estinzione, minacciate oSpecie valore commerciale come la glaucomi (Sander vitreus) e ostrica orientale (Crassostrea virginica) 3. La giustificazione di supporto per imporre le finestre ambientali spesso si concentra su come le attività di dragaggio possono potenzialmente fisicamente disturbare (ad esempio, i sedimenti in sospensione) la capacità di un animale di completare una parte specifica della sua storia di vita. Le fasi della vita comunemente citati sono uova e larve per mantenere le rotte migratorie aperto per le specie anadrome 3. Tuttavia, vi sono informazioni limitate per quanto riguarda specie-specifici effetti biologici rilevanti per 4,5 sedimenti in sospensione a disposizione per informare utilizzando finestre ambientali come strumento di gestione del rischio.
Per queste ragioni, la fugge è stato progettato, costruito e utilizzato per simulare la sospensione dei sedimenti, e per determinare i suoi effetti sulla prime fasi di vita degli organismi acquatici. Fugge studi utilizzano particelle di sedimenti a grana fine (cioè, prevalentemente limi,argille e sabbie fini), che hanno più probabilità di rimanere in sospensione e migrano più lontano dalla sorgente. Il fugge è capace di uova di test e larve di pesce, ma può anche essere montato ad accogliere altri organismi acquatici, rendendolo una capacità unica. I dati della risposta biologica risultanti possono essere utilizzati per valutare gli effetti dei sedimenti in sospensione. Le seguenti procedure forniscono una panoramica di come la tecnologia può essere costruito e gestito per produrre concentrazioni di sedimenti in sospensione ripetibili e dati gli effetti utilizzando varie specie acquatiche.
Protocol
Representative Results
Discussion
La tecnologia fugge migliora metodi esistenti 4,9 mantenendo e controllando sedimenti in sospensione in un ampio intervallo di tempi di esposizione e concentrazioni sedimenti sospesi con un sistema automatizzato, controllato da computer. La tecnologia è flessibile, che può essere utilizzato per valutare gli effetti di sedimenti in sospensione a più specie acquatiche e fasi di vita di varie dimensioni da uova agli adulti a seconda della specie. In futuro, la tecnologia è in grado di valutare gli effetti di…
Declarações
The authors have nothing to disclose.
Acknowledgements
This research was funded by the U.S. Army Corps of Engineers Dredging Operations and Environmental Research Program, Todd Bridges, Director. Permission was granted by the Chief of Engineers to publish this material.
Materials
| Parts List for one FLEES Module, Water Bath, and Aquarium | |||
| post, wood – used to build module (cut to 78 in) | Local vendor | N/A | Quantity: 4 Size: 4 in x 4 in x 8 ft |
| plywood, marine grade – fastened to wooden posts about 18 in off ground – for holding water bath (60 in x 42 in) | Local vendor | N/A | Quantity: 1 Size: 3/4 in x 4 ft x 8 ft |
| plywood – fastened on top of wooden posts – for holding pipes, solenoids and electrical (60 in x 42 in) | Local vendor | N/A | Quantity: 1 Size: 1/4 in x 4 ft x 8 ft |
| stud, wood – used to brace plywood and wooden posts (cut to fit) | Local vendor | N/A | Quantity: 4 Size: 2 in x 4 in x 96 in |
| tank, fiberglass – water bath with two drains: 1) to supply chiller; and 2) to drain water | Hydro Composites, LLC, Stockdale, TX, USA | FBT-226 | Quantity: 1 Size: 150-gal |
| chiller, water with self contained pump – for water bath; chiller sits under module | Remcor Products Co., Glendale Heights, IL, USA | CFF-500 | Quantity: 1 Size: 1/2 hp |
| tank, domed bottom – FLEES aquaria – sit inside water bath | United States Plastic Corp, Lima, OH, USA | 5197 | Quantity: 5 Size: 19 L |
| tank, stand – acrylic stand, 12 in x 12 in x 6 in – to hold aquaria | custom built by ERDC shops | N/A | Quantity: 5 Size: custom |
| urethane, liquid- to seal carboy plug and prevent leaking | Forsch Polymer Corporation, Englewood, CO | 60A Liquid Urethane | Quantity: 5 Size: epoxy kit |
| pump, magnetic drive – to suspend sediment in each aquarium | March Manufacturing Inc., Glenview, IL, USA | MDX-3-1/2 115 v | Quantity: 5 Size: 28 liter per min |
| light, LED – installed over water bath | C2 Development, Inc., Ames, IA, USA | Hydra 26 | Quantity: 2 Size: based on area to light |
| pipe, PVC schedule 40 – installed in drain of water bath to control water level | Local vendor | N/A | Quantity: – Size: 1 in |
| fittings, bulkhead – for aquaria/water bath connections to pumps, drains, water and slurry lines | Lifegard Aquatics, Cerritos, CA, USA | R270900 | Quantity: 20 Size: 1/2 in FPT x FPT |
| fittings, quick-disconnect, male pipe threaded inserts – insert in tank bulkhead | Cole-Parmer, Vernon Hills, IL, USA | EW-31303-36 | Quantity: 10 Size: 1/2 in MPT |
| fittings, quick-disconnect, valved hose barbs – connection between aquarium and insert in tank bulkhead | Cole-Parmer, Vernon Hills, IL, USA | EW-31303-11 | Quantity: 10 Size: 1/2 in |
| fittings, black HDPE threaded elbow – for aquaria vinyl tube connections to slurry/water line and pump | United States Plastic Corp, Lima, OH, USA | 62043 | Quantity: 20 Size: 1/2 NPT x 1/2 in Hose ID |
| fittings, black HDPE threaded adapter – for connections between pump and tank bulkhead | United States Plastic Corp, Lima, OH, USA | 62017 | Quantity: 10 Size: 1/2 NPT x 1/2 in Hose ID |
| tube, vinyl – connect slurry/water line to aquaria and to connect pumps to aquaria | Local vendor | N/A | Quantity: 25 ft Size: 1/2 in ID |
| tube, vinyl – connect to aquaria drains inserts and water bath drain | Local vendor | N/A | Quantity: 25 ft Size: 5/8 in ID |
| clamp, hose, stainless steel – to clamp vinyl tube to hose barbs | Local vendor | N/A | Quantity: 40 Size: #8 |
| Name | Company | Catalog Number | Comments |
| Parts list for Slurry System | |||
| chiller, water with self contained pump – sits off to side of slurry tank | Remcor Products Co., Glendale Heights, IL, USA | CFF-500 | Quantity: 1 Size: 1/2 hp |
| 125 gallon open top cone bottom tank w/Stand – 42 in x 35 in – contains the water and sediment to make slurry | United States Plastic Corp, Lima, OH, USA | 8586 | Quantity: 1 Size: 125 gal |
| Cover for 125 gallon tank | United States Plastic Corp, Lima, OH, USA | 8935 | Quantity: 1 Size: 42 in x 35 in |
| valve, PVC – connect tank drain to pump – isolate for maintenance | local plumbing vendor | N/A | Quantity: 2 Size: 1-1/2 in |
| pump, double diaphragm mounted on stand – used to recirculate slurry | Wilden-pumps.co.uk & Air Pumping Ltd., Essex, UK | P2/PPPP/WF/WF/PTV/400 | Quantity: 1 contact distributor |
| sensor, optical backscatter – measure NTU in slurry tank | Campbell Scientific, Logan, UT, USA | OBS-3+ | Quantity: 1 Size: 0-1000 NTU |
| pipe, PVC Schedule 40 – to recirculate slurry | local plumbing vendor | N/A | Quantity: 20 ft Size: 1 in |
| pipe, flexible PVC – fitted with union and used to connect to next module | local plumbing vendor | N/A | Quantity: 10 ft Size: 1 in |
| union, PVC Schedle 80 Socket – connect slurry line with next module | local plumbing vendor | N/A | Quantity: 8 Size: 1/2 in |
| solenoid, plastomatic (normally closed) – introduce slurry | Plast-O-Matic Valves, Inc., Cedar Grove, NJ, USA | EASYMT4V12R24-PV | Quantity: 5 Size: 1/2 in NPT threaded, 24 VAC contact distributor |
| fitting, PVC tee – connect slurry pipe with solenoid | local plumbing vendor | N/A | Quantity: 5 Size: 1 in x 1 in x 1 in slip x slip x FIPT |
| fittings, 1 in PVC ball valve threaded – shut off for slurry delivery to solenoid/water lines | local plumbing vendor | N/A | Quantity: 7 Size: 1/2 in |
| fittings, 1 in PVC union threaded – connect slurry solenoid to shut off valve | local plumbing vendor | N/A | Quantity: 5 Size: 1/2 in |
| tube, vinyl – connection between water solenoid and slurry solenoid | Local vendor | N/A | Quantity: 50 ft Size: 1/4" ID |
| Name | Company | Catalog Number | Comments |
| Parts list for Water System | |||
| chiller, water with self contained pump – sits off to side of reservoir | Remcor Products Co., Glendale Heights, IL, USA | CFF-500 | Quantity: 1 Size: 1/2 hp |
| 125 gallon open top cone bottom tank w/Stand – 42 in x 35 in – contains the water and sediment to make slurry | United States Plastic Corp, Lima, OH, USA | 8586 | Quantity: 1 Size: 125 gal |
| Cover for 125 gallon tank | United States Plastic Corp, Lima, OH, USA | 8935 | Quantity: 1 Size: 42 in x 35 in |
| valve, PVC – connect tank drain to water pump | local plumbing vendor | N/A | Quantity: 2 Size: 1 in |
| pump, magnetic drive, in-line use – used to recirculate water to aquaria and chiller | Little Giant, Fort Wayne, IN, USA | 3-MD-SC | Quantity: 1 Size: 1/12 hp |
| solenoid, alco – introduce water | discontinued; ASCO, Florham Park, NJ,USA for similar | N/A | Quantity: 5 Size: 24 v, 1/4 in NIPT |
| fittings, black HDPE reducer connector – connect 1/4 in hose water line from solenoid to 1/2 in hose | local plumbing vendor | N/A | Quantity: 5 Size: 1/2 in hose ID x 1/4 in hose ID |
| fittings, black HDPE tee – connect 1/2 in hose water line and slurry to aquaria | local plumbing vendor | N/A | Quantity: 5 Size: 1/2 in NPT x 1/2 in hose ID x 1/2 in hose ID |
| fittings, street elbow | local plumbing vendor | N/A | Quantity: 5 Size: 1/2 in 90° MIPT x FIPT |
| fittings, PVC threaded pipe nipples – connect union fittings with solenoids and other connections | local plumbing vendor | N/A | Quantity: 12 Size: 1/2 in |
| fittings, union threaded – connect slurry/water lines with next module | local plumbing vendor | N/A | Quantity: 6 Size: 1 in PVC |
| fittings, reducer bushing – connect to reducer tee in water line | local plumbing vendor | N/A | Quantity: 5 Size: 1/2 in male by 1/4 in female FIPT |
| fittings, threaded pipe nipples – connection between bushing and water solenoid | local plumbing vendor | N/A | Quantity: 5 Size: 4 in long x 1/4 in |
| pipe, PVC – make connections between tank, pump and chiller | local plumbing vendor | N/A | Quantity: 5 ft Size: Schedule 40 |
| Name | Company | Catalog Number | Comments |
| Parts list for Sensors, Data Acquisition Device, and Computer Software | |||
| software, LabView | National Instruments, Austin, Texas, USA | LabView 2015 Base | Quantity: 1 Size: N/A |
| SCXI-1001 12-Slot Chassis, U.S. 120 VAC | National Instruments, Austin, Texas, USA | 776571-01 | Quantity: 1 Size: N/A |
| SCXI 1100 – 32-Channel, ±10 V Analog Input Module | National Instruments, Austin, Texas, USA | 776572-00 | Quantity: 1 Size: N/A |
| SCXI 1303 – Terminal block designed for high-accuracy thermocouple measurements | National Instruments, Austin, Texas, USA | 777687-03 | Quantity: 2 Size: N/A |
| SCXI 1102B – 32-Channel Thermocouple/Voltage Input Module | National Instruments, Austin, Texas, USA | 776572-02B | Quantity: 1 Size: N/A |
| SCXI 1161 – General-Purpose Relay Module | National Instruments, Austin, Texas, USA | 776572-61 | Quantity: 6 Size: N/A |
| SCXI 1300 – General-Purpose Voltage Module | National Instruments, Austin, Texas, USA | 777687-00 | Quantity: 1 Size: N/A |
| PCMCIA Card DAQCARD-AI-16E-4 | National Instruments, Austin, Texas, USA | N/A – legacy | Quantity: 1 Size: N/A used cards available online |
| sensor, optical backscatter – measure NTU in each aquarium | Campbell Scientific Inc., Logan, UT, USA | OBS-3+ | Quantity: 5 Size: 0-1000 NTU |
Referências
- National Research Council (NRC). A process for setting, managing, and monitoring environmental windows for dredging projects. Marine Board, Transportation Research Board, Special Report 262. , (2001).
- Suedel, B. C., Kim, J., Clarke, D. G., Linkov, I. A risk-informed decision framework for setting environmental windows for dredging projects. Sci Total Environ. 403, 1-11 (2008).
- Reine, K. J., Dickerson, D. D., Clarke, D. G. Environmental windows associated with dredging operations. DOER Technical Notes Collection. ERDC TN DOER-E2. , (1998).
- Wilber, D. H., Clarke, D. G. Biological effects of suspended sediments: A review of suspended sediment impacts on fish and shellfish with relation to dredging activities in estuaries. N Am J Fish Manag. 21, 855-875 (2001).
- Suedel, B. C., Lutz, C. H., Clarke, J. U., Clarke, D. G. The effects of suspended sediment on walleye (Sander vitreus) eggs. J. Soils Sediments. 12, 995-1003 (2012).
- Travis, J., Kring, J. . LabVIEW for Everyone: Graphical Programming Made Easy and Fun (National Instruments Virtual Instrumentation Series). , (2006).
- Hazardous Waste Test Methods/SW-846 On-line. Office of Solid Waste and Emergency Response (OSWER) Available from: https://www.epa.gov/hw-sw846/sw-846-compendium (2016)
- Plumb, R. H. . Procedure for handling and chemical analysis of sediment and water samples, EPA/CE-81-1. , (1981).
- Clarke, D. G., Wilber, D. H. . Assessment of potential impacts of dredging operations due to sediment resuspension. , (2000).
- Suedel, B. C., Clarke, J. U., Lutz, C. H., Clarke, D. G., Godard-Codding, C., Maul, J. Suspended sediment effects on walleye (Sander vitreus). J. Great Lakes Res. 40, 141-148 (2014).
- Wilkens, J. L., Katzenmeyer, A. W., Hahn, N. M., Hoover, J. J., Suedel, B. C. Laboratory test of suspended sediment effects on short-term survival and swimming performance of juvenile Atlantic Sturgeon (Acipenser oxyrinchus oxyrinchus). J. Appl. Ichthy. 31, 984-990 (2015).
- Suedel, B. C., Clarke, J. U., Wilkens, J., Lutz, C. H., Clarke, D. G. The effects of a simulated sediment plume on eastern oyster (Crassostrea virginica) survival, growth, and condition. Estuaries and Coasts. 38 (2), 578-589 (2015).
- Bilotta, G. S., Brazier, R. E. Understanding the influence of suspended solids on water chemistry and aquatic biota. Water Res. 42, 2849-2861 (2008).
- Reine, K., Clarke, D., Dickerson, C., Pickard, S. Assessment of potential impacts of bucket dredging plumes on walleye spawning habitat in Maumee Bay, Ohio. Proceedings of the 18th World Dredging Congress (WODCON XVIII). , (2007).
