Settlement of the Bay Scallop (Argopecten irradians) along the Gulf Coast of Florida DOI

Stephen P. Geiger,

Sarah P. Stephenson,

Melanie L. Parker

и другие.

Journal of Shellfish Research, Год журнала: 2023, Номер 42(3)

Опубликована: Дек. 31, 2023

Before collapsing, bay scallops (Argopecten irradians) supported commercial fisheries in Florida but, following decades of restoration efforts and management actions, still support a recreational fishery. Settlement was monitored along the west coast from 1992 through 2018, using collector traps. The primary environmental variables retained analyses included temperature, salinity, red tide concentration (Karenia brevis). settlement rate generally increased for first days trap deployment, then leveled off or declined. peaked when average water temperatures were between 21°C 23°C at four sites: St. Andrew Bay, Joseph West Coast, Pine Island Sound, indicative fall peak spawning. At Tampa Bay Sarasota sites, around 16°C, winter most highest occurred association with declines temperature 10°C–15°C during fall, smaller, secondary occurring similar increases spring. Warming may already be negatively affecting ability subpopulations to synchronously spawn, unknown impacts population dynamics. all declined rapidly salinity fell below 30 little 27, approached zero approximately 20. occurrence K. brevis exceeding 10,000 cells/L resulted reduced settlement. In core populations Coast Steinhatchee, uncommon, resumed blooms abated. For sites outside population, 2–4 y after tides. Recovery these noncore probably relies on exogenous supply larvae core. If that penetrate region, as observed 2021, become more severe, frequent, have longer durations, entire scallop could endangered.

Язык: Английский

Changes in Cyanobacterial Phytoplankton Communities in Lake-Water Mesocosms Treated with Either Glucose or Hydrogen Peroxide DOI Creative Commons

David M. Linz,

Charlyn Partridge,

Michael C. Hassett

и другие.

Microorganisms, Год журнала: 2024, Номер 12(9), С. 1925 - 1925

Опубликована: Сен. 22, 2024

When cyanobacterial phytoplankton form harmful blooms (HCBs), the toxins they produce threaten freshwater ecosystems. Hydrogen peroxide is often used to control HCBs, but it broadly toxic and dangerous handle. Previously, we demonstrated that glucose addition lake water could suppress abundance of cyanobacteria. In this study, was compared hydrogen for treatment communities. The six-week study conducted in large mesocosms facility at Grand Valley State University's Annis Water Resources Institute Michigan. To 1000 L Muskegon Lake water, added either 150 mg or 30 glucose/L. 3 mg/L two mesocosms. And were left untreated as controls. Triplicate 100 mL samples collected weekly from each mesocosm, which then filtered frozen -80 °C 16S rRNA amplicon sequencing. sequencing results revealed quickly reduced relative cyanobacteria mesocosms, population returned over course 6-week study. On other hand, both concentrations caused a rapid proliferation multiple low proteobacterial bacteroidotal taxa resulting notable increases taxonomic richness duration reducing Although suppressed cyanobacteria, later near starting levels. apparently by promoting competitive heterotrophic bacteria.

Язык: Английский

Процитировано

2
An early-warning forecast model for red tide (Karenia brevis) blooms on the southwest coast of Florida DOI
Miles Medina, Paul Julian,

Nicholas Chin

и другие.

Harmful Algae, Год журнала: 2024, Номер 139, С. 102729 - 102729

Опубликована: Сен. 24, 2024

Язык: Английский

Процитировано

1
Spatiotemporal variability of satellite-derived abundance of Karenia spp. during 2021 in shelf waters along the Pacific coast of Hokkaido, Japan DOI Creative Commons
Hiroshi Kuroda, Satomi Takagi,

Tomonori Azumaya

и другие.

Frontiers in Marine Science, Год журнала: 2024, Номер 11

Опубликована: Окт. 7, 2024

Unprecedented catastrophic damage to coastal fisheries attributable harmful Karenia outbreaks were reported in Pacific shelf waters off the southern coast of Hokkaido from late summer autumn 2021. To understand spatiotemporal variability blooms, we analyzed Sentinel 3-derived abundances spp. together with marine environmental variables. very widely distributed over a maximum more than 400 km along easternmost Cape Erimo, where there was nearly stable water-mass front, west, pure subtropical water inhibited westward expansion blooms. The duration appearance at fixed point long—about 45 days—in middle part shelf. East Tokachi River, time-averaged robustly correlated alongshore velocity and stability Coastal Oyashio, boundary current; intense currents associated less developed Time-averaged highest shelf, west low-salinity river suppressed development surface winter mixed layer might have fostered favorable growth conditions supplied nutrients land origin. During period changed rapidly on small scale (typically, ≤2 days ≤50 km) association physical-biochemical coupled submesoscale variations. Subsampling these variations 1-day intervals showed that maxima center gravity moved slowly typical 4 cm s −1 . This one-third Oyashio. Particle-tracking experiments implied horizontal advection by which eliminated upstream downstream contributed long blooms

Язык: Английский

Процитировано

1
Prediction of hydrological and water quality data based on granular-ball rough set and k-nearest neighbor analysis DOI Creative Commons

Limei Dong,

Xinyu Zuo, Yiping Xiong

и другие.

PLoS ONE, Год журнала: 2024, Номер 19(2), С. e0298664 - e0298664

Опубликована: Фев. 23, 2024

Hydrological and water quality datasets usually encompass a large number of characteristic variables, but not all these significantly influence analytical outcomes. Therefore, by wisely selecting feature variables with rich information content removing redundant features, it only can the analysis efficiency be improved, model complexity also simplified. This paper considers introducing granular-ball rough set algorithm for variable selection combining k-nearest neighbor method back propagation network to analyze hydrological data, thus promoting overall fused inspection. The results data show that proposed produces better compared using standalone regressor.

Язык: Английский

Процитировано

1
Physiological and transcriptomic analyses to determine the responses of the harmful algae Akashiwo sanguinea to phosphorus utilization DOI
Han Zhang, Xi Chen,

Huichen Sun

и другие.

Marine Environmental Research, Год журнала: 2024, Номер 202, С. 106753 - 106753

Опубликована: Сен. 19, 2024

Язык: Английский

Процитировано

1
Influence of regulated water discharges on phytoplankton composition and biomass in a subtropical canal DOI Creative Commons

Susan Badylak,

Edward J. Phli̇ps, Eric C. Milbrandt

и другие.

Journal of Environmental Management, Год журнала: 2024, Номер 373, С. 123470 - 123470

Опубликована: Дек. 3, 2024

Phytoplankton composition and biomass were investigated in the C-43 Canal southwest Florida during a period of shifting discharges from water control structures. The canal receives regulated eutrophic Lake Okeechobee via S77 structure. During periods high discharge spring early summer, cyanobacteria dominated phytoplankton community, including blooms harmful algal bloom (HAB) species Raphidiopsis raciborskii, Limnothrix redekei Microcystis aeruginosa. low lake, mid-summer autumn, inputs to came primarily tributaries watershed surrounding C-43. decreased, but relative importance dinoflagellates increased, July. dinoflagellate community included Ceratium, Durinskia baltica, Glochidinium penardiforme, Gymnodinium fuscum, Parvodinium goslaviense, umbonatum/inconspicuum complex, Peridiniopsis quadridens, Woloszynskia reticulata, an unidentified thecate athecate species. D. baltica P. goslaviense recorded for first time Florida. Data was also obtained on temperature, conductivity, fluorescent dissolved organic matter, chlorophyll a, total nitrogen, inorganic phosphorus, PO

Язык: Английский

Процитировано

1
Changes in the spatial distribution of total phosphorus in sediment and water column of a shallow subtropical lake DOI
Paul Julian, Tracey B. Schafer, Matthew J. Cohen

и другие.

Lake and Reservoir Management, Год журнала: 2023, Номер 39(3), С. 213 - 230

Опубликована: Июль 3, 2023

Julian PJ II, Schafer T, Cohen MJ, Jones P, Osborne TZ. 2023. Changes in the spatial distribution of total phosphorus sediment and water column a shallow subtropical lake. Lake Reserv Manage. XX:XXX–XXX.In lakes, interactions between bed strongly influence availability transport nutrients. Okeechobee, South Florida, is eutrophic, shallow, polymictic lake that exhibits frequent mixing resuspension unconsolidated sediments. The objective this study was to evaluate temporal patterns characteristics linkage (TP) concentrations. Spatiotemporal generalized additive models identified key periods during which both surface suspended solids (TSS) TP increased, corresponding hurricane tropical storm activity. Our regions with persistently greater concentrations than average, indicating potential hot spots processes and/or internal loading. Sediment bulk density (BD) were inversely correlated, light, less dense sediments have concentrations, potentially contributing redistribution P. An integrated evaluation using model revealed influences explaining area concentration ≤500 mg/kg increasing while low decreasing, marking improvement conditions. If trend persists, it indicates increasingly storing P can resist entrainment, significant implications for assessing trajectory restoration.

Язык: Английский

Процитировано

2
Phytoplankton communities of the west coast of Florida – multiyear and seasonal responses to nutrient enrichment DOI Creative Commons
Emily R. Hall,

L. Kellie Dixon,

Gary J. Kirkpatrick

и другие.

Harmful Algae, Год журнала: 2023, Номер 130, С. 102547 - 102547

Опубликована: Ноя. 19, 2023

Blooms of the harmful algae species Karenia brevis are frequent off southwest coast Florida despite having relatively slow growth rates. The regional frequency these algal blooms led to examination dominant estuarine outflows for effects on both K. and phytoplankton community in general. There is comparatively little information rates non-Karenia taxonomic groups other than diatoms. A seasonally based series (Fall, Winter, Spring) bioassay experiments were conducted determine nutrient response coastal community. Treatments included waters (Tampa Bay, Charlotte Harbor, Caloosahatchee River) applied a 1:25 dilution added water mimic influence environment. Other treatments 5-15 μM additions nitrogen (N), phosphorus (P), silica (Si) species, amino acids, N (urea) + P water. Incubations under ambient conditions with shading 48 h. Analyses dissolved particulate nutrients coupled HPLC analysis characteristic photopigments assignments biomass via CHEMTAX. community, dominated by diatoms, cyanophytes prasinophytes, was significantly different season, indicating seasonal fidelity composition. Specific chlorophyll indicated no significant difference between any controls, treatment, P, or Si treatments. Conditions uniformly N-limited highest diatom biomass. Despite differing initial communities, however, there reproducible changes due persistent decline various taxa, including haptophytes, cyanophytes, cryptophytes. For one which present, relative diatoms mixed evident, that identifying behavior taxa critical simulation competition successful prediction region's blooms.

Язык: Английский

Процитировано

1
Development of a new Diatom-Based Index (BDIAR) for biomonitoring Mediterranean streams using data from Algerian Rivers DOI
Hadjer Kaddeche, Nadjla Chaïb,

Faïza Noune

и другие.

Hydrobiologia, Год журнала: 2024, Номер 851(9), С. 2261 - 2277

Опубликована: Янв. 23, 2024

Язык: Английский

Процитировано

0
Developing a Genetic Algorithm for Selecting Infrastructure Modifications that Optimize Hydrodynamic Flushing in Old Tampa Bay DOI Creative Commons
Steven D. Meyers, Marcus W. Beck, Edward T. Sherwood

и другие.

Estuaries and Coasts, Год журнала: 2024, Номер 47(6), С. 1402 - 1417

Опубликована: Июль 20, 2024

Abstract Impermeable infrastructure such as traffic causeways can reduce the natural hydrodynamic flushing of an estuary, resulting in reduced water quality and increased incidence harmful algal blooms (HABs). A series cuts through three spanning Old Tampa Bay, FL, (OTB) are being considered to help restore circulation region, but number possible location combinations is computationally challenging fully assess. prototype genetic algorithm (GA) was developed identify optimal configuration these one bridge sections that maximizes represented a numerical ocean model OTB. Flushing measured by integrating trajectories over 21,000 passive Lagrangian “particles” using velocity fields. The rate loss particles initialized near Feather Sound (a region subject frequent HABs) used quantify “fitness” which configurations were optimized. highest-scoring solution produced 42% increase net compared no-change baseline. Six independently applications GA conducted. All converged same within no more than 7 generations. small population size allowed testing complete space, verification found optimal. Elitism (preservation highest-ranking solution) required for convergence. also identified had similar, slightly slower, rates. These results will area managers prioritize or rank causeway modifications improve overall conditions Bay.

Язык: Английский

Процитировано

0