glengad landfall intertidal survey report (summer 2008)

GLENGAD LANDFALL

INTERTIDAL SURVEY REPORT (SUMMER

2008)

SHELL E&P IRELAND LTD

P40036 January 2009

(Rev 01)

RSK Environment Ltd Glengad Landfall Intertidal Survey Report

RSK/H/P/P40036/Landfall survey June 2008_rev01 i January 2009

RSK General Notes Project No: P40036 Title: Glengad Landfall Survey Report Client: Shell E&P Ireland Ltd. Issue Date: January 2009 Issuing Office: Helsby Authorised by: David Watson

Project Manager Date: 23rd January

2009 Authorised by: Alec Moore

Project QA Rep Date: 23rd January

2009

AM AB January 2009

E 01 Final

AM DW January 2009

E 00 Draft

AUTHOR CHECKED DATE ISSUED

ISSUED POST /

ELECTRONIC

REV PURPOSE OF ISSUE


RSK/H/P/P40036/Landfall survey June 2008_rev01 ii January 2009

CONTENTS

1. Introduction...............................................................................1

1.1 Background.................................................................................................1

1.2 2005 survey..................................................................................................1

1.3 2008 survey..................................................................................................1

2. Methods.....................................................................................2

2.1 General........................................................................................................2

2.2 Surface sediment physico-chemistry .......................................................2

2.3 Benthic infauna...........................................................................................2

3. Results ......................................................................................5

3.1 Surface sediment physico-chemistry .......................................................5 3.1.1 Particle size analysis ................................................................................................................ 5 3.1.2 Total Organic Carbon .............................................................................................................. 5 3.1.3 Comparison with 2005 data ..................................................................................................... 5

3.2 Benthic infauna...........................................................................................7 3.2.1 General .................................................................................................................................... 7 3.2.2 Diversity .................................................................................................................................. 7 3.2.3 Taxonomic composition .......................................................................................................... 8 3.2.4 Abundance ............................................................................................................................... 8 3.2.5 Comparison with 2005 data ..................................................................................................... 8 3.2.6 June 2008 Station descriptions ................................................................................................ 9

4. References ..............................................................................13

TABLES Table 2.1: Co-ordinates of sampling stations referred to in the present report. ..............................2 Table 3.1: Particle size and organic carbon data for Glengad landfall sediments. ..........................6 Table 3.2: Summary diversity and abundance data for June 2008 survey, based on fauna retained

on a 0.5mm sieve ......................................................................................................................7 Table 3.3: Benthic infauna species list for the 2008 and 2005 survey .............................................7 Table 3.4: Macrofauna retained on 1mm mesh sieve: comparison of data between 2005 and 2008

...................................................................................................................................................9

FIGURES Figure 2.1: Location of sampling stations at Glengad landfall..........................................................3 Figure 3.1: Wind-blown sediment and strandline material at LCS1, upper shore ............................9 Figure 3.2: Wet rippled sand with drift algae at LCS2 ....................................................................10 Figure 3.3: Rippled high-energy sand at ZX1; upper shore ...........................................................11 Figure 3.4: Damp rippled sand and core sampler at station ZX2, mid shore station .....................11 Figure 3.5: Flat freely draining sand amongst rock outcrop on upper shore at landfall transect,

upper shore. ............................................................................................................................12 Figure 3.6: Uniform medium sand on mid shore, landfall transect .................................................12


RSK/H/P/P40036/Landfall survey June 2008_rev01 iii January 2009

APPENDICES

APPENDIX 1: RAW SEDIMENT DATA

APPENDIX 2: RAW BENTHIC INVERTEBRATE DATA


RSK/H/P/P40036/ Landfall survey June 2008_rev01 1January 2009

1. INTRODUCTION

1.1 Background

Shell E&P Ireland Ltd. (Shell) have been granted consent to install a gas pipeline from the offshore Corrib field to a processing terminal at Bellanaboy Bridge in County Mayo (Republic of Ireland). This route requires a pipeline landfall at Glengad, on the coast of Broadhaven Bay.

1.2 2005 survey

As part of the ecological monitoring programme for the development, pre-construction surveys of the intertidal environment have been commissioned by Shell.

The first of these pre-construction surveys was undertaken by Ecological Consultancy Services Ltd (EcoServe) in June 2005 (EcoServe, 2005), in anticipation of works occurring later that year. However, works were postponed until summer 2008 and because of this delay it was agreed that an additional pre-construction survey would be carried out to provide updated baseline data.

1.3 2008 survey

RSK Environment Ltd (RSK) were contracted by Shell to perform this pre-construction survey of the landfall, which was undertaken on the 11th and 12th June 2008.

Several aspects of the 2005 survey were retained in order to provide comparable data. These included the position of the two transects (LS and LCS, each with three stations at upper, mid and lower shore) and the use of four 10.5cm diameter core replicates for macrofaunal sampling. However, some additional aspects were included in order to provide further information on the environment: an extra transect (ZX) was added between the two transects sampled in 2005. While 2005 samples were processed for macrofauna by sieving over a 1mm mesh only, samples in the 2008 survey were also sieved over a 0.5mm mesh in order to provide both comparable data to the 2005 survey and to provide further fine-scale detailed information.

The pre-construction survey was intended to be the baseline against which further (post-construction) surveys were to be measured. These surveys were due to take place 1 month and 6 months post-construction and finally one year after the pre-construction survey. The one month and 6 month post-construction surveys were to have a reduced scope (only grain size and total organic carbon to be analysed).


RSK/H/P/P40036/ Landfall survey June 2008_rev01 2 January 2009

2. METHODS

2.1 General

The survey was conducted by two RSK Environment Ltd marine ecologists on the 11th and 12th of June 2008. Survey work was timed to coincide with low-water for maximum exposure of the intertidal; however, LS3 was covered at the time of survey and as such the nearest practical area was sampled.

Stations were located using a hand-held GPS unit (Garmin GPS60, accurate to ~5m or less). Positions of the stations sampled are presented in Table 2.1 and on Figure 2.1.

Table 2.1: Co-ordinates of sampling stations referred to in the present report.

Station Latitude (North) Longitude (West)

LS1 54.2834 9.821 LS2 54.2836 9.8219 LS3 54.2836 9.8223

LCS1 54.2862 9.8124 LCS2 54.2885 9.8176 LCS3 54.289 9.822 ZX1 54.2849 9.8161 ZX2 54.2856 9.8185 ZX3 54.286 9.8233

2.2 Surface sediment physico-chemistry

For particle size analysis, a sample of approximately 500ml volume was taken using a trowel from the surface 5cm of exposed intertidal sediment. All PSA samples were stored in double-labelled plastic bags. Samples were then despatched to, and analysed by, the Environment Agency’s National Laboratory Service, U.K. Raw sediment data are presented in Appendix 1.

Sediments are classified according to Folk (1954) based on their relative contents of gravel (>2mm), sand (>63µm to 2mm) and mud (<63µm); descriptions using the Udden-Wentworth scale are also provided. The Udden-Wentworth scale descriptions are based on the mean grain size calculated using the 16th, 50th and 84th percentiles.

2.3 Benthic infauna

Four (A-D) faunal sample replicates were collected at each station using a hand-held plastic core of 10.5cm diameter, pushed down to a depth of 20cm. Sediment was then placed in double-labelled plastic pots prior to being sieved in seawater over a 0.5mm aperture sieve within 12 hours of collection. All samples were fixed in 4% formaldehyde solution buffered with borax (sodium tetraborate), before shipment to a specialist benthic taxonomy laboratory (Hebog Environmental) for detailed analysis.

All macrofaunal samples were processed for identification in the laboratory by further sieving over both a 1mm and 0.5mm aperture sieve, such that data could easily be compared with the previous EcoServe survey (which used 1mm mesh) as well as providing fine-scale 0.5mm data for detailed monitoring.



Figure 2.1: Location of sampling stations at Glengad landfall



Biotope descriptions used in this report are those according to The Marine Habitat Classification for Britain and Ireland Version 04.05 (Connor et al., 2004).

Given the naturally low numbers of individuals recorded in this beach environment, it was not possible to use the raw data in any statistical analyses. Raw benthic invertebrate data are presented in Appendix 2.



3. RESULTS

3.1 Surface sediment physico-chemistry

3.1.1 Particle size analysis

Summary particle size analysis (PSA) data from surface sediment samples are presented in Table 3.1. Full data are presented in Appendix 1.

All sediment samples were composed entirely of medium sand, with no gravel (>2mm) or mud (<63µm) present, reflecting the high-energy environment of this exposed shoreline, and its high degree of sorting both through wave and wind processes. However, within the survey area there were some minor differences in the size of sand particles, both downshore and between transects.

3.1.2 Total Organic Carbon

Total Organic Carbon (TOC) results, as % of surface sediments are presented in Table 3.1.

With the exception of the upper shore station at LCS1, all TOC results were below detection limits (i.e. <0.1%) and reflect the absence of fine sediments, with which TOC levels are usually associated. The single value from LCS1 is likely to reflect the presence of dead macroalgal organic matter here, which in turn appeared to foster an abundant talitrid community.

The levels of TOC found are as anticipated for a high-energy and exposed Atlantic sandy beach.

3.1.3 Comparison with 2005 data

The 2005 EcoServe survey did not present raw grain size data or size classifications, and therefore direct comparisons are not possible. However, silt was absent at all stations, and “fine” and “medium” sand together comprised at least 80% of all samples, suggesting that conditions were very similar in 2005 to 2008. Stations on the landfall transect in 2005 exhibited a higher proportion of “fine” sediment than that at the control transects, which reflects the 2008 data and the lower average particle size on landfall sites (compared to control sites).

No TOC data were collected in 2005, and therefore direct comparison again is not possible. However, the TOC levels of typically <0.1% recorded in the 2008 survey reflect those widely recorded throughout high-energy sand environments in Sruwaddacon and Rossport Bays in 2007 (RSK, 2007).



Table 3.1: Particle size and organic carbon data for Glengad landfall sediments. Average particle size (mm) Station % Gravel

>2mm % Sand

63µm-2mm % Mud <63µm Mean Median

Classification (Folk, 1954)

Classification (Udden-Wentworth) TOC %

LCS1 0 100 0 0.497 0.414 Sand Medium Sand 0.19 LCS2 0 100 0 0.469 0.415 Sand Medium Sand <0.10 LCS3 0 100 0 0.532 0.480 Sand Medium Sand <0.10 ZX1 0 100 0 0.283 0.268 Sand Medium Sand <0.10 ZX2 0 100 0 0.404 0.351 Sand Medium Sand <0.10 ZX3 0 100 0 0.395 0.364 Sand Medium Sand <0.10 LS1 0 100 0 0.304 0.283 Sand Medium Sand <0.10 LS2 0 100 0 0.307 0.285 Sand Medium Sand <0.10 LS3 0 100 0 0.373 0.330 Sand Medium Sand <0.10



3.2 Benthic infauna

3.2.1 General

Summary diversity and abundance data for each station (based on pooled data for all four replicates and all individuals retained on both a 0.5 and 1mm mesh sieve) are presented in Table 3.2. Raw data is presented in Appendix 2.

Table 3.2: Summary diversity and abundance data for June 2008 survey, based on fauna retained on a 0.5mm sieve

LCS ZX LS 1 2 3 1 2 3 1 2 3

Total number of taxa 2 7 5 1 5 7 2 4 5 Total individuals 114 24 9 12 5 20 4 6 20 Number per m2* 3295 694 260 347 145 580 116 174 580

*Based on pooled data from all four replicates per station.

The use of four replicates proved valuable in effectively sampling both diversity and abundance. At station ZX2, for example, 3 of the 5 taxa (all comprising one individual each) recorded were only within one replicate, representing 60% of both diversity and abundance.

3.2.2 Diversity

A species list for the 2008 survey (showing presence on either/or the 1mm and 0.5mm mesh sieves, as well as data from the 2005 1mm sieve survey for comparison) is presented in Table 3.3. A total of 17 taxa of infauna were recorded; in addition, the bryozoan Electra pilosa was recorded as epifauna (e.g. on a pebble or shell) at LCS2.

Species richness was low at all sites, ranging from 1-7. At each of the three transects, the lowest species richness was recorded at the upper shore station, which is likely to be a reflection of the limited number of highly adapted organisms that inhabit this harsh environment. For two transects (ZX and LS) the greatest species richness was at the lower shore station, while for LCS the mid shore station was slightly richer in species.

Table 3.3: Benthic infauna species list for the 2008 and 2005 survey

2008 2005 Taxon 1mm 0.5mm 1mm Nemertea (ribbon worms) Nemertea indet Annelida (segmented worms) Polychaeta Exogone naidina Nephtys caeca Nephtys cirrosa Nephtys sp. Scolelepis bonnieri Scolelepis squamata Spio filicornis Spio indet Psammodrilus balanoglossoides Baldia johnstoni Travisia forbesii Oligochaeta Oligochaeta indet Tubificoides benedii



2008 2005 Taxon 1mm 0.5mm 1mm Enchytraeidae Crustacea Mysidacea (Opossum shrimps) Gastrosaccus spinifer Amphipoda (Sand hoppers) Amphipoda indet. Perioculodes longimanus Pontocrates arenarius Talorchestia deshayesii Urothoe brevicornis Bathyporeia pelagica Microprotopus maculatus

In the 2008 survey, the 1mm sieve was almost as effective as the 0.5mm in sampling diversity of amphipods, but less successful at sampling polychaete, and particularly oligochaete, diversity. Four taxa (Exogone naidina, Spio sp. indet., Tubificoides benedii and Perioculoides longimanus) were only found on the 0.5mm sieve and may therefore have been absent from 2005 results because of the sieve size used in that survey.

The 2008 survey recorded Baldia johnstoni, a species of capitellid polychaete only described relatively recently; this is likely to represent a noteworthy first record for Ireland, as it has previously only been recorded on the western North Sea coast of Scotland and northern England (R. Bamber, Associate, Natural History Museum, London, pers. comm.).

3.2.3 Taxonomic composition

In terms of abundance, the individuals sampled were dominated by crustaceans (54.2%), followed by annelid worms (39.2%); the remainder (6.5%) consisted of nemertean worms.

The crustaceans were almost exclusively composed of amphipod shrimps, with the exception of a single mysid (Opossum shrimp). The vast majority of amphipods were the talitrid Talorchestia deshayesii, characteristic of algae strandlines on the upper shore. The majority of annelids recorded were oligochaetes, nearly all of which were enchytraeids. Molluscs and echinoderms were absent, as expected for a high-energy and mobile intertidal sand community.

3.2.4 Abundance

Summary abundance data for each station is presented in Table 3.2, and ranged from 116-3295 individuals m-2.

Station LCS1 on the upper shore had the greatest abundance overall, which comprised a community of oligochaete worms and talitrid amphipods present in and around strandline algae. For the landfall and ZX control transects, the highest abundances were recorded at the most seaward station.

3.2.5 Comparison with 2005 data

As both 0.5mm and 1mm mesh sieves were used in the 2008 survey, the latter data can be directly compared to those from the 2005 survey. Summary data for both surveys are presented in Table 3.4.



Table 3.4: Macrofauna retained on 1mm mesh sieve: comparison of data between 2005 and 2008

LCS ZX LS 1 2 3 1 2 3 1 2 3

June 2008 Total number of taxa 2 5 4 1 3 4 2 2 4

Total individuals 44 6 5 11 3 8 4 4 10 Number per m2 1272 173 145 318 87 231 116 116 289

June 2005 Total number of taxa 0 3 3 0 1 3

Total individuals 0 7 3 0 1 3 Number per m2 0 202 87

N/A 0 29 87

In terms of species richness, more species were recorded in 2008 at all stations. Notably, no taxa at all were recorded at upper shore stations in 2005 (compared to 2 at each of the stations in 2008), although the naturally shifting nature of the strandline is likely to strongly influence presence and abundance of organisms. Differences in the resolution and quality of the analysis between 2005 and 2008 are also possible.

In terms of composition, the species sampled in both surveys were broadly the same, comprising amphipods, oligochaetes, and nephtyd and spionid polychaetes.

3.2.6 June 2008 Station descriptions

This section provides brief descriptions of each station, including a biotope type based on the Marine Habitat Classification for Britain and Ireland Version 04.05 (Connor et al., 2004).

LCS 1

The upper shore station here recorded the greatest overall abundance of organisms (114), although it was characterised by a low diversity of just two taxa: enchytraeid oligochaete worms, and the amphipod shrimp Talorchestia deshayesii. The high abundance but low diversity reflects the naturally harsh nature of the habitat, but also the relatively large degree of food resources for those species adapted to it. Both of these groups are characteristic of dried seaweed habitats material on the upper shore, and as such the habitat here can be classified as LS.LSa.St.Tal (Talitrids on the upper shore and strand-line).

Figure 3.1: Wind-blown sediment and strandline material at LCS1, upper shore



LCS2

Further down the shore, a greater diversity of seven species (the joint highest in the survey) of infaunal taxa was recorded, although the total abundance was far less (24). Four of the species were crustaceans, comprising a single mysid (Gastrosaccus spinifer) and three species of amphipod shrimp, the most abundant of which was Urothoe brevicornis, a species characteristic of clean, mobile sand communities. Other taxa consisted of nemertean worms, the polychaete Travisia forbesii, and enchytraeid oligochaetes. In addition, the common colonial bryozoan Electra pilosa was recorded as epifauna (e.g. from the surface of a shell or small stone). The fauna recorded does not clearly fall within a specific biotope type classification, but is within the broader category of LS.LSa.MoSa (Barren or amphipod dominated mobile sand shores).

Figure 3.2: Wet rippled sand with drift algae at LCS2

LCS3

This station recorded 5 taxa and just 9 individuals. In addition to those species recorded further up the shore on this transect (nemertean worms, the polychaete Travisia forbesii, the amphipod Microprotopus maculatas), single individuals of the polychaete worms Scolelepis squamata and Nepthys cirrosa were recorded, both of which are characteristic of exposed intertidal sand environments. As for LCS2, the fauna recorded falls within the broader category of LS.LSa.MoSa (Barren or amphipod dominated mobile sand shores). NB No photo.

ZX1

This upper shore station had the lowest species richness of all stations: only a single species was recorded, the talitrid amphipod T. deshayesii. This was found in a lower total abundance compared to the same station on LCS1 (12 compared to 61), which is likely to reflect slight differences in variables such as the degree of dessication and the amount of dried seaweed available as a food resource. This habitat is classified as LS.LSa.St.Tal (Talitrids on the upper shore and strand-line).



Figure 3.3: Rippled high-energy sand at ZX1; upper shore

ZX2

This mid-shore station recorded a sparse fauna of a single individual each of five species: two amphipods (B. pelagica and Pontocrates arenarius), and three polychaete worms (Spio sp. indet., S. squamata, and Psammodrilus balanoglossoides). This is similar to LS.LSa.MoSa.AmSco (Amphipods and Scolelepis spp. in littoral medium-fine sand).

Figure 3.4: Damp rippled sand and core sampler at station ZX2, mid shore station

ZX3

This station recorded the joint highest number of taxa (7), with a relatively high abundance of 20 individuals. The fauna here comprised 3 species of amphipod crustacean (Bathyporeia pelagica, P. arenarius, and Perioculodes longimanus), 3 species of polychaete worm (S. squamata, P. balanoglossoides, and Exogone naidina, a syllid characteristic of the lower intertidal and shallow subtidal habitats) and nemertean worms. This is very similar to LS.LSa.MoSa.AmSco (Amphipods and Scolelepis spp. in littoral medium-fine sand). NB No photo.

LS1

The upper shore station at LS1 recorded the lowest abundance of all of the stations, with just four individuals. This was comprised of two individuals each of the polychaetes S. squamata and Baldia johnstoni, the latter of which is classed as “Nationally Scarce” in the UK. This is similar to the biotope LS.LSa.MoSa.AmSco.Sco (Scolelepis spp. in littoral mobile sand).



Figure 3.5: Flat freely draining sand amongst rock outcrop on upper shore at landfall

transect, upper shore.

LS2

Six individuals comprising four species were recorded; half of all individuals were the polychaete S. squamata, with the remainder comprising a nemertean worm, an oligochaete worm (Tubificoides benedii), and the amphipod B. pelagica. This is similar to the biotope LS.LSa.MoSa.AmSco.Sco (Scolelepis spp. in littoral mobile sand).

Figure 3.6: Uniform medium sand on mid shore, landfall transect

LS3

Twenty individuals composed of five taxa were recorded here, with over half of the individuals being the amphipod shrimp P. arenarius. The amphipod B. pelagica and the polychaete S. squamata were also present, with a single individual each of the polychaete N. cirrosa and a nemertean. This conforms well with LS.LSa.MoSa.AmSco.Pon (Pontocrates arenarius in littoral mobile sand). NB No photo.



4. REFERENCES

Connor, D.W., Allen, J.H., Golding, N. Howell, K.L., Lieberknecht, L.M., Northen, K.O. And Reker, J.B. (2004) The Marine Habitat Classification for Britain and Ireland Version 04.05 JNCC, Peterborough.

EcoServe (2005) Baseline report for the monitoring of the marine ecology in relation to the building of the gas pipeline and outfall in Broadhaven, Co. Mayo-Pre construction survey (June – July 2005). EcoServe report prepared for Shell E&P Ireland. 27 July 2005.

Folk, R.L. (1954) The distinction between grain size and mineral composition in sedimentary rock nomenclature. Journal of Geology 62 (4), 344-359.

RSK (2007) Inner Broadhaven Bay Marine and Intertidal Ecological Sampling Survey Report (Summer 2007). Report issued by RSK to Shell E&P Ireland, November 2007.



Appendix 1: Raw sediment analysis data



LCS1 LCS2 LCS3 LS1 LS2 LS3 ZX1 ZX2 ZX3Grain size fraction (µm) > 8000 microns 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

4000 to 7999 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.002000 to 3999 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

1000 to 2000 7.33 3.35 4.96 0.0500 0.00 0.710 0.00 2.03 0.250

500 to 999 30.6 31.4 41.5 6.11 6.85 19.6 2.37 21.9 21.0250 to 499 43.0 53.2 47.6 56.9 56.7 51.6 56.2 53.1 62.9

125 to 249 18.7 12.1 5.95 36.6 36.0 27.4 41.2 22.8 15.9

63 to 125 0.340 0.00 0.00 0.360 0.420 0.770 0.310 0.130 0.00< 63 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00

< 20 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00Mean particle diameter (mm) 0.497 0.469 0.532 0.304 0.307 0.373 0.283 0.404 0.395Median particle diameter (mm) 0.414 0.415 0.480 0.283 0.285 0.330 0.268 0.351 0.364Organic carbon as % of dry weight 0.190 <0.100 <0.100 <0.100 <0.100 <0.100 <0.100 <0.100 <0.100


RSK/H/P/P40036/ Landfall survey June 2008_rev01 16January 2009

Appendix 2: Raw benthic invertebrate abundance data



LS1 Transect LS1-A

LS1-B LS1-C

LS1-D LS2-A

LS2-B LS2-C

LS2-D LS3-A

LS3-B LS3-C

LS3-D MCS Code 0.5 1 All 0.5 1 All 0.5 1 All 0.5 1 All 0.5 1 All 0.5 1 All 0.5 1 All 0.5 1 All 0.5 1 All 0.5 1 All 0.5 1 All 0.5 1 All Nemertea

G0001 Nemertea indet 1 1 1 1

Annelida

P0498 Nephtys cirrosa 1 1

P0783 Scolelepis squamata 1 1 1 1 1 1 1 1 1 1 2 2 1 1

P0905 Baldia johnstoni 1 1 1 1

P1490 Tubificoides benedii 1 1

Crustacea

S0135 Pontocrates arenarius 3 3 3 1 4 1 3 4

S0456 Bathyporeia pelagica 1 1 2 1 3 1 1

1 1 1 1 2 1 1 2 4 7 6 3

Total abundance 4 Total abundance 6 Total abundance 20 Total no. of taxa 2 Total no. of taxa 4 Total no. of taxa 5



LCS Transect LCS1-A

LCS1-B LCS1-C

LCS1-D LCS2-A

LCS2-B LCS2-C

LCS2-D LCS3-A

LCS3-B LCS3-C

LCS3-D MCS Code 0.5 1 All 0.5 1 All 0.5 1 All 0.5 1 All 0.5 1 All 0.5 1 All 0.5 1 All 0.5 1 All 0.5 1 All 0.5 1 All 0.5 1 All 0.5 1 All Nemertea G0001 Nemertea indet 1 1 3 3 1 1 2 2 2 2 Annelida P0422 Exogone naidina P0498 Nephtys cirrosa 1 1 P0783 Scolelepis squamata 1 1 P0787 Spio indet

P0864 Psammodrilus balanoglossoides

P0905 Baldia johnstoni P1007 Travisia forbesii 1 1 1 1 1 1 P1490 Tubificoides benedii P1501 Enchytraeidae 5 5 33 33 3 3 11 1 12 3 3 Crustacea S0044 Gastrosaccus spinifer 1 1 S0131 Perioculodes longimanus S0135 Pontocrates arenarius S0243 Talorchestia deshayesii 3 3 11 17 28 4 26 30 1 1 S0247 Urothoe brevicornis 11 1 12 S0456 Bathyporeia pelagica 1 1 S0550 Microprotopus maculatus 1 1 Bryozoa Y0178 Electra pilosa P ## 8 61 3 42 4 3 17 0 3 4 2 0 Total abundance 114 Total abundance 24 Total abundance 9

Total number of taxa 2





ZX Transect ZX1-A ZX1-B

ZX1-C ZX1-D

ZX2-A

ZX2-B

ZX2-C ZX2-D

ZX3-A ZX3-B

ZX3-C ZX3-D

MCS Code 0.5 1 All 0.5 1 All 0.5 1 All 0.5 1 All 0.5 1 All 0.5 1 All 0.5 1 All 0.5 1 All 0.5 1 All 0.5 1 All 0.5 1 All 0.5 1 All Nemertea

G0001 Nemertea 2 2 1 1

Annelida

P0422 Exogone naidina 1 1

P0783 Scolelepis squamata 1 1 1 1 2 2

P0787 Spio 1 1

P0864 Psammodrilus balanoglossoides 1 1 1 1 1 1 2 2

Crustacea

S0131 Perioculodes longimanus 1 1

S0135 Pontocrates arenarius 1 1 2 2 1 1

S0243 Talorchestia deshayesii 2 2 1 1 5 5 4 4

S0456 Bathyporeia pelagica 1 1 1 1 2 1 1 2 1 1

2 1 5 4 3 0 1 1 6 1 6 7

Total abundance 12 Total abundance 5 Total abundance 20 Total number of taxa 1 Total number of taxa 5 Total number of taxa 7

glengad landfall intertidal survey report (summer 2008)

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