Deep-sea benthic boundary layer communities and food supply: A long-term monitoring strategy

Abstract Zooplankton monitoring in shelf seas predominantly uses nets that miss the benthic boundary layer (BBL) just above the seabed. However, this boundary between pelagic and benthic assemblages can be faunistically rich, having its own distinct hyperbenthic fauna and acting as a low-light refuge for overwintering or dielly migrating zooplankton. To compare species richness and composition between pelagic and BBL habitats, we sampled a long-term monitoring site in the Western English Channel seasonally. Metabarcoding methods applied to vertical net samples (top 50 m in a ∼54-m water column) and those from a hyperbenthic sledge generated >100 000 sequences clustered into 294 operational taxonomic units. Of these, 215 were found in the BBL and 170 in the water column. Some key taxa (e.g. mysids) were native to the BBL; by contrast, other delicate taxa (e.g. ctenophores) seemed to avoid the BBL. The major contrasts in plankton composition related to the seasonal cycle rather than to pelagic-BBL differences, suggesting that the basic dynamics of the site are captured by our ongoing long-term weekly resolution monitoring. Overall, metabarcoding approaches, applied to both water column and BBL, provide an independent view of plankton dynamics, and augment existing traditional methods.

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Long-term monitoring strategy for concrete-based structures using nonlinear Kalman filtering

Journal de Physique IV (Proceedings) ◽

10.1051/jp4:2006136020 ◽

2006 ◽

Vol 136 ◽

pp. 191-200 ◽

Cited By ~ 1

Author(s):

K. A. Snyder ◽

Z. Q. Lu ◽

J. Philip

Keyword(s):

Kalman Filtering ◽

Monitoring Strategy ◽

Long Term Monitoring ◽

Nonlinear Kalman Filtering ◽

Term Monitoring

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Long-Term Monitoring Strategy for Time-Dependent Deflections of Posttensioned Concrete Bridges

Journal of Bridge Engineering ◽

10.1061/(asce)be.1943-5592.0001139 ◽

2017 ◽

Vol 22 (11) ◽

pp. 04017095 ◽

Cited By ~ 1

Author(s):

Brock D. Hedegaard ◽

Catherine E. W. French ◽

Carol K. Shield

Keyword(s):

Concrete Bridges ◽

Time Dependent ◽

Monitoring Strategy ◽

Posttensioned Concrete ◽

Long Term Monitoring ◽

Term Monitoring

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Validation of the TOLNet lidars during SCOOP (Southern California Ozone Observation Project)

EPJ Web of Conferences ◽

10.1051/epjconf/201817605019 ◽

2018 ◽

Vol 176 ◽

pp. 05019

Author(s):

Thierry Leblanc ◽

Maria-Jose Granados-Munoz ◽

Kevin Strawbridge ◽

Chris Senff ◽

Andy Langford ◽

...

Keyword(s):

Boundary Layer ◽

Long Range Transport ◽

Table Mountain ◽

Boundary Layer Processes ◽

Range Transport ◽

Robust Network ◽

Field Campaigns ◽

Long Term Monitoring ◽

Term Monitoring

Five TOLNet lidars participated to a validation campaign at the JPL-Table Mountain Facility, CA in August 2016. All lidars agreed within ±10% of each other and within ±7% of the ozonesondes. Centralized data processing was used to compare the uncertainty budgets. The results highlight the TOLNet potential to address science questions ranging from boundary layer processes to long range transport. TOLNet can now be seen as a robust network for use in field campaigns and long term monitoring.

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