Benthic response to water column productivity patterns: Evidence for benthic-pelagic coupling in the Northeast Water Polynya

1995 ◽  
Vol 100 (C3) ◽  
pp. 4411 ◽  
Author(s):  
William G. Ambrose ◽  
Paul E. Renaud
Keyword(s):  
Water Column ◽  
Benthic Pelagic Coupling ◽  
Northeast Water Polynya ◽  
Response To Water

Contribution of Gammarus lacustris to phosphorus recycling in a fishless alpine lake

1999 ◽  
Vol 56 (9) ◽  
pp. 1679-1686 ◽  
Author(s):  
Frank M Wilhelm ◽  
Jeff J Hudson ◽  
David W Schindler
Keyword(s):  
Water Column ◽  
Vertical Migration ◽  
Mountain Lakes ◽  
Plankton Community ◽  
Alpine Lake ◽  
Gammarus Lacustris ◽  
Benthic Pelagic Coupling ◽  
Phosphorus Recycling ◽  
Planktonic Community ◽  
Total P

We estimated the net P transport by Gammarus lacustris from the benthic to pelagic regions of a fishless alpine lake and compared it with P regeneration by the entire plankton community. Gammarus lacustris released between 5.2 and 18.1 ng P·L-1·h-1 (adults only and adults plus immatures, respectively) in the pelagic region during nighttime vertical migration. Additional P released into and removed from the water column due to predation on zooplankton was estimated at 1.87 and 2.3 ng P·L-1·h-1, respectively. The net daily regeneration of 52.2-181.4 ng P·L-1·day-1 by the G. lacustris population represented 9.5-32.9% of the total P regenerated by the planktonic community. The majority of the P released by G. lacustris represents "new" P to the pelagic zone because it originated in sediments. We conclude that G. lacustris can represent an important link in benthic-pelagic coupling in oligotrophic mountain lakes.

scholarly journals The Importance of Food Pulses in Benthic-Pelagic Coupling Processes of Passive Suspension Feeders

Water ◽  
2021 ◽  
Vol 13 (7) ◽  
pp. 997
Author(s):  
Sergio Rossi ◽  
Lucia Rizzo
Keyword(s):  
Water Column ◽  
Single Species ◽  
Branching Pattern ◽  
Suspension Feeders ◽  
Paramuricea Clavata ◽  
Order Of Magnitude ◽  
Benthic Pelagic Coupling ◽  
Intensive Sampling ◽  
Coupling Processes ◽  
Capture Rates

Benthic-pelagic coupling processes and the quantity of carbon transferred from the water column to the benthic suspension feeders needs multiple intensive sampling approaches where several environmental variables and benthos performance are quantified. Here, activity, dietary composition, and capture rates of three Mediterranean gorgonians (Paramuricea clavata, Eunicella singularis, and Leptogorgia sarmentosa) were assessed in an intensive cycle considering different variables such as the seston concentration and quality (e.g., carbon, nitrogen, and zooplankton), the colony branch patterns, and the energetic input of the single species (i.e., mixotrophic and heterotrophic). The three species showed clear differences in their impact on the seston concentration. Paramuricea clavata, the most densely distributed, showed a greater impact on the near bottom water column seston. The lowest impact of E. singularis on the seston could be explained by its mixotrophy and colony branching pattern. Leptogorgia sarmentosa had a similar impact as E. singularis, having a much more complex branching pattern and more than an order of magnitude smaller number of colonies per meter square than the other two octocorals. The amount of carbon ingested in the peaks of the capture rates in the three species may cover a non-neglectable proportion of the potential carbon fluxes.

Interactions with the Benthos Alter Pelagic Food Web Structure in Coastal Waters

1991 ◽  
Vol 48 (11) ◽  
pp. 2276-2284 ◽  
Author(s):  
Barbara K. Sullivan ◽  
Peter H. Doering ◽  
Candace A. Oviatt ◽  
Aimee A. Keller ◽  
Jeffrey B. Frithsen
Keyword(s):  
Food Web ◽  
Water Column ◽  
Coastal Waters ◽  
Benthic Communities ◽  
Food Web Structure ◽  
Web Structure ◽  
Pelagic Food Web ◽  
High Nutrient ◽  
Pelagic Food Webs ◽  
Benthic Pelagic Coupling

Results from studies in experimental enclosures containing both water column and benthic communities show that the benthos has an important effect on the structure and productivity of pelagic food webs whether the system is nutrient enriched or nutrient limited. Research over a 10-yr period in 13-m3 mesocosms showed that changes in the pelagic food web were correlated with different sediment communities and with the presence or absence of a benthos. The abundance of copepods was inversely correlated with numbers of macrofauna. At both low and high nutrient levels, systems without benthos had greatly enhanced numbers of carnivorous holozooplankton including ctenophores, medusans, chaetognaths, and fish. Our observations indicate that the presence of the benthos shortens the pelagic food web.and inhibits the response of pelagic fauna to nutrient enrichment in well-mixed coastal waters. The strength of benthic–pelagic coupling, which is controlled by the amount of turbulence in the water column, may be more important to food web structure than the rate of nutrient supply and could determine which subsystem responds to eutrophication.

Benthic community patterns reflect water column processes in the Northeast Water polynya (Greenland)

1997 ◽  
Vol 10 (1-4) ◽  
pp. 467-482 ◽  
Author(s):  
Dieter Piepenburg ◽  
William G. Ambrose ◽  
Angelika Brandt ◽  
Paul E. Renaud ◽  
Michael J. Ahrens ◽  
...  
Keyword(s):  
Water Column ◽  
Benthic Community ◽  
Community Patterns ◽  
Northeast Water Polynya

scholarly journals Seasonal patterns of benthic-pelagic coupling in oyster habitats

2020 ◽  
Vol 652 ◽  
pp. 95-109
Author(s):  
NE Ray ◽  
RW Fulweiler
Keyword(s):  
Nitrogen Cycling ◽  
Water Column ◽  
Rhode Island ◽  
Seasonal Patterns ◽  
Oyster Reefs ◽  
Reef Restoration ◽  
Suspended Particulates ◽  
Net Zero ◽  
Benthic Pelagic Coupling ◽  
The Impact

Oysters enhance benthic-pelagic coupling in coastal systems by moving large quantities of suspended particulates to the sediments, stimulating biogeochemical processes. Recent research efforts have focused on quantifying the impact of oysters on coastal biogeochemical cycling, yet there is little consensus on how oysters influence processes across systems. A potential driver of this variance is availability of organic material suspended in the water column and subsequent loading to sediment by oysters. Here, we measured fluxes of sediment di-nitrogen (N2-N), ammonium (NH4+), combined nitrate-nitrite (NOx), and phosphate (PO43-) in spring, summer, and fall at 2 oyster reefs and 1 farm in a temperate estuary (Narragansett Bay, Rhode Island). We then linked these fluxes with patterns of water column primary production. Nitrogen removal from the system was highest in spring, when we detected net sediment denitrification (48.8 µmol N2-N m-2 h-1) following a winter-spring diatom bloom. In contrast, we measured sediment N2 fixation in fall (-44.8 µmol N2-N m-2 h-1) at rates nearly equivalent to spring denitrification. In the summer, we measured a nearly net zero sediment N2-N flux (-2.7 µmol N2-N m-2 h-1). Recycling of nitrogen to the water column was consistent across seasons, composed almost exclusively of NH4+. These results demonstrate that sediment nitrogen cycling in oyster habitats is dynamic and can change rapidly based on seasonal patterns of productivity. At carrying capacity, the impact of oysters on nitrogen cycling is large and should be considered during efforts to increase oyster populations through aquaculture or reef restoration.

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