week runs from sunday to saturday ireland: predictions · nmp current closures asp azp dsp psp 0 0...

HAB Bulletin [status of harmful and toxic algae]

Week runs from Sunday to Saturday

Ireland: Predictions

ASP event: Moderate to high.AZP event: Low in general, moderate in Western sites.

DSP event: Highest SW, W, NW. High all remaining areas.

PSP event: Highest SW site specific. Low to moderate elsewhere .

ASP: Moderate to high caution as cell levels in some sites increasing significantly. Patches , below regulatory limits , occurring around entire coastline, related to environmental suitable conditions.

AZP: Moderate precaution in SW, low elsewhere on coastline. Continued negligible levels of toxins present in samples tested ,with no clear presence trend. This species has caused sudden acute issues in the past and rarely presents any reliable trends.

DSP: Highest caution in affected areas. Environmental conditions suitable for cell level increases and spread. Highest SW and W, now experiencing closures as indicated, and moderate to high throughout all coastline. Full caution advised during this time.

PSP: No Change- 5 week trend. Highest SW region, see specific sites. Suitable environmental conditions expected and may increase risk – adjacent sites’ caution advised. Low elsewhere. Alexandrium cells can occur in both toxic and nontoxic forms. Southerly transportation possible.

Blooms: Highest :Currently bloom levels of multiple species are occurring in localised areas. Both beneficial and detrimental blooms may occur in areas of good growth and suitable environmental conditions. Transient wind driven blooms of some species may temporarily accumulate on shores. Any unusual water discoloration should always be noted and regional labs contacted if concerned /regarding possible need for additional sampling. All feedback is welcome at [email protected]

NMP Current closures

ASP AZP DSP PSP

0 0 4 0

Week 33: August 9th – 15th 2020

Based on sites tested

mailto:[email protected]

HAB Bulletin [status of harmful and toxic algae]

National Monitoring ProgrammeHISTORIC TRENDS

ASP events: mid-March to early May

AZP events: April to December

DSP events: May to December

PSP events: June to mid-July and end September. Predominantly in Cork Harbour.

AZP

DSP

PTX

ASP

PSP

Levels from week 1 to present week. Regulatory limit - - - - - - -

DSP and Dinophysis sp. current trends

Ireland HAB & Biotoxin Distribution maps

[current status of harmful and toxic algae]

Phytoplankton species – last 3 wks.

All levels of DSP biotoxin recorded - last 3 wks.

Current closures levels≥ DSP 0.16 µg/g

CommentsWk.33 – Continued highestcaution. Dinophysis cellscontinue to be present inaffected areas. Areas adjacentto closed areas should exercisehigh caution also. Suitableenvironmental conditions forincreasing levels. Highestcaution and good samplingadvised until cells decreasecompletely.



Phytoplankton species – last 3 wks. All levels of AZP biotoxin recorded - last 3 wks.

AZP and Azadinium like species current trends

Current closures levels≥ AZP 0.16 µg/g

CommentsWk. 33 Continuednegligible toxin levelscurrently . No clear trendestablished. Possibleincrease in caution in SW, 1wk trend.

ASP



ASP and Pseudo nitzschia sp. current trends

Current closures levels≥ASP 20 µg/g

CommentsWk. 33 - Increasing morestrongly all areas - moderatecaution in all affected areasdue to increases in cellpresence and fluctuatingtrends. Currently only lowlevels of toxins observed.

Phytoplankton species – last 3 wks.

All levels of ASP biotoxin recorded – last 3 wks.



PSP and Alexandrium sp. current trends

Phytoplankton species (last 3 wks.)

All levels of PSP biotoxin recorded (last 3 wks.)

CommentsWk. 33 – NO change -

Continued highest cautionadvised in SW areas with highpotential cell levels. Adjacentsites should also exerciseadditional caution duringcurrent favourableenvironmental /transportconditions. Elsewhere lowlevels of insitu potential cellsobserved. This is now thehistorical period of occurrenceand localised issues can occurrapidly in specific sites .

Current closures levels≥ PSP 800 µg/Kg

Ireland Fish killing phytoplankton Distribution maps


Karenia mikimotoi

(old name: Gyrodinium aureolum)Current general conditions: Wk. 33

Potential for problematic species to cause issues : High

Alexandrium sp. Highest - specific sites only

Karenia mikimotoi High, rapidly increasing.

Heterocapsa sp. Moderate

Noctiluca scintillans Moderate –high increasing

Coscinodiscus species Moderate increasing.

Phaeocystis sp. Moderate to high.

Chaetoceros sp Moderate to High.

Continued high levels of Phytoplankton cells observed in most

areas, particularly in sheltered innerbay areas .Calm weather,

with high UV indices combined with localised onshore winds have

caused sporadic localised bloom issues. Please note , any species

at sufficient numbers may cause temporary issues in water quality

which could impact specific areas over the course of a tidal cycle

or for a period of days while specific suitable conditions prevail. All

areas should maintain good routine sampling if concerned.

Karenia sp. cells now observed inshore at significant levels in

some sites. This species has been known to come inshore

suddenly, at bloom levels, during suitable environmental

conditions. If concerned about a problematic or toxic species level

please check specific site information updates at www.marine.ie .

Phaeocystis speciesKarenia mikimotoiHeterocapsa spp.Noctiluca scintillans

Alexandrium spp.

Any part of coastline

SW currently

https://www.marine.ie/

Ireland Satellite data: surface chlorophyll and temperature maps

Top 5 phytoplankton cell levels in all areas last week

NW coast (M4) Below average by 1.14°C wk.32SW coast (M3) Below average by 0.14°C wk.32SE coast (M5) Below average by 0.51°C wk.32

Week 33

Warm waters influencing all Southern areas.Continued increases of Chlorophyll levels indicatinghigh localised growth in sheltered innerbay areas.Caution should be exercised asweather/environmental conditions allow transportonto exposed shorelines. Warmer waters, peaksunlight and potential nutrient increases from heavyrain shower runoff will increase risks. Suitableenvironmental conditions for increase localisedbloom activity. Some areas are now experiencingproblematic blooms. Extra caution advised in allareas.

Rank Region Species Rounded Count

1 East Rhizosolenia spp. 89000

2 East Pseudo-nitzschia seriata complex

17000

3 East Leptocylindrus danicus 3000

4 East Striatella spp. 2000

5 East Chaetoceros (Hyalochaete) spp.

2000

1 South-East Leptocylindrus danicus 15000

2 South-East Pseudo-nitzschia seriata complex

11000

3 South-East Guinardia delicatula 3000

4 South-East Lauderia / Detonula sp 1000

5 South-East Scrippsiella spp. 1000

1 West North-west Rhizosolenia spp. 33000

2 West North-west Asterionellopsis spp. 4000

3 West North-west Leptocylindrus danicus 4000

4 West North-west Chaetoceros (Hyalochaete) spp.

2000

5 West North-west Scrippsiella spp. 2000

1 North-West Leptocylindrus danicus 689000

2 North-West Prorocentrum micans 332000

3 North-West Chaetoceros (Hyalochaete) spp.

256000

4 North-West Skeletonema spp. 15000

5 North-West Pseudo-nitzschia delicatissima complex

5000

1 West Skeletonema spp. 487000

2 West Chaetoceros (Hyalochaete) spp.

314000

3 West Striatella spp. 17000

4 West Leptocylindrus danicus 8000

5 West Rhizosolenia spp. 4000

1 South Cylindrotheca closterium/ Nitzschia longissima

10000

2 South Pseudo-nitzschia seriata complex

2000

3 South Odontella spp. 1000

4 South Euglena/Eutreptiella spp. 1000

5 South Odontella aurita 1000

1 South-West Gymnodinium spp. 4147000

2 South-West Alexandrium spp. 1066000

3 South-West Skeletonema spp. 258000

4 South-West Pseudo-nitzschia seriata complex

24000

5 South-West Haptophytes 22000

1 West South-West Azadinium/heterocapsa spp. 21000

2 West South-West Alexandrium spp. 18000

3 West South-West Cilliates 4000

4 West South-West Protoperidinium spp. 4000

5 West South-West Paralia sulcata 2000

Ireland modelled data: Estimated Water PathwayWeek runs from Sunday to Saturday

Week 23: 31 May – 6 June, 2015Ireland modelled data: Estimated Water Pathway

The maps show the most

likely transport pathways

for the next 3 days of

phytoplankton found along

the presented transects

(black lines off Mizen Head

and the Mouth of Bantry Bay)

and water depths (bottom,

20 metres and surface)

Bottom water Water @ 20 metres Surface water

Reddish colours represent areas

where phytoplankton remain

longest

Cooler colours represent areas

where phytoplankton remain for

shorter periods

Offshore Northerly directional water movements in all depth of waters.

Minimal water transportation conditions creating possible temporary conditions for layers to

form in calm conditions, with low levels downwelling.

SOUTHWEST: Bantry Bay Forecast for the next 3 days

Ireland modelled data: Estimated Water Pathway

Bantry Bay3 day estimated water flows at the mouth and mid-bay sections of Bantry Bay

T1

T1

T2

Forecast for next 3 days

De

pth

20 m

20 m

Water surface

Sea bed

Flow (m3 s-1)

100

80

60

40

20

0

-20

-40

-60

-80

-100

IN

OUT

Shot Head cross section:

Downwelling and possible

layering expected to be main

activity and transportation of outer

waters into inner regions.

Mouth cross section:

Downwelling of surface

waters expected as

deeper waters transport

bring water into bay into

inner bay areas.

CURRENT inflowInflow is 23% lower than the long term mean at Shot Head

Inflow is 24% lower than the long term mean at mouth of Bay

Ireland modelled data: Estimated Water PathwayWeek runs from Sunday to Saturday

Week 23: 31 May – 6 June, 2015Ireland modelled data: Estimated Water Pathway

The maps show the most

likely transport pathways

for the next 3 days of

phytoplankton found along

the presented transects i.e.

white lines off Aughrus Point

and the Mouth of Killary

Harbour, and water depths

(bottom, 20 metres and

surface)

Reddish colours represent

areas where phytoplankton

remain longest

Cooler colours represent

areas where phytoplankton

remain for shorter periods

WEST: Killary Harbour Forecast for the next 3 days

Bottom water Water @ 20 metres Surface water

ClegganNortherly dominant water movements in all depth zones in offshore and near shore waters,

becoming more active towards surface waters .

KillaryOffshore waters entering bay in deeper zones while surface waters expected to remain stable with

low flows.


Killary Harbour - 3 day estimated water flows at the mouth of Killary Harbour

T1

T1

Killary Harbour

De

pth

CURRENT inflow

Inflow is 44% lower than average long term mean at mouth of

Bay

Water

surface


Flow (m3 s-1)

100

80

60

40

20

0

-20

-40

-60

-80

-100

IN

OUT

Killary Harbour Mouth cross section:

Deeper offshore water transportation

through upwelling expected into midbay

areas .


West Coast - 3 day estimated water flows along a transect off Aughrus Point

T1

110 m

Water surface


northward

flow

southward

flow

T1

Killary Harbour

Cleggan transect

Aughrus Point

De

pth

Flow (m3 s-1)

100

80

60

40

20

0

-20

-40

-60

-80

-100

northward

flow

southward

flow

T1

Killary Harbour

Cleggan transect

Aughrus Point

Cleggan section: Dominant

Southerly transportation in all

depths offshore with minor

squeezed Northerly transport in

nearshore areas.

week runs from sunday to saturday ireland: predictions · nmp current closures asp azp dsp psp 0 0...

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