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Resistance of benthic intertidal communities to multiple disturbances and stresses

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The following supplement accompanies the article

Resistance of benthic intertidal communities to multiple

disturbances and stresses

Laetitia Joseph, Mathieu Cusson*

*Corresponding author: mathieu.cusson@uqac.ca

Marine Ecology Progress Series 534: 49–64 (2015)

Supplement

Table S1. Taxa list (with classification) found during the sampling period at Sainte-Flavie, Quebec,

Canada. Taxa marked with * were removed in the canopy treatments, and taxa with ** were removed

in the grazer exclusion treatments.

Species Type Phylum Class Order Family Algae

Chordaria flagelliformis Brown algae Ochrophyta Phaeophyceae Ectocarpales Chordariaceae

Ectocarpus sp. Brown algae Ochrophyta Phaeophyceae Ectocarpales Ectocarpaceae

Fucus distichus

edentatus* Brown algae Ochrophyta Phaeophyceae Fucales Fucaceae

Fucus vesiculosus* Brown algae Ochrophyta Phaeophyceae Fucales Fucaceae

Laminaria sp. Brown algae Ochrophyta Phaeophyceae Laminariales Laminariaceae

Ralfsia fungiformis Brown algae Ochrophyta Phaeophyceae Ralfsiales Ralfsiaceae

Stragularia clavata Brown algae Ochrophyta Phaeophyceae Scytosiphonales Scytosiphonaceae

Clathromorphum

circumscriptum Red algae Rhodophyta Florideophyceae Corallinales Hapalidiaceae

Rhodomela confervoides Red algae Rhodophyta Florideophyceae Ceramiales Rhodomelaceae

Hildenbrandia rubra Red algae Rhodophyta Rhodophyceae Hildenbrandiales Hildenbrandiaceae

Ulvaceae Green algae Chlorophyta Ulvophyceae Ulvales Ulvaceae

Invertebrates

Lacuna vincta** Animals Mollusca Gastropoda Littorinimorpha Littorinidae

Littorina obtusata** Animals Mollusca Gastropoda Littorinimorpha Littorinidae

Littorina saxatilis** Animals Mollusca Gastropoda Littorinimorpha Littorinidae

Littorina littorea** Animals Mollusca Gastropoda Littorinimorpha Littorinidae

Margarites sp.** Animals Mollusca Gastropoda Archaeogastropoda Trochidae Nudibranchia Animals Mollusca Gastropoda Nudibranchia

Skeneopsis planorbis** Animals Mollusca Gastropoda Littorinimorpha Skeneopsidae

Tectura Testudinalis** Animals Mollusca Gastropoda Patellogastropoda Lottidae

Macoma Balthica Animals Mollusca Bivalva Veneroida Tellinidae

Mya arenaria Animals Mollusca Bivalva Myoida Myidae

Mytilus edulis Animals Mollusca Bivalva Mytiloida Mytilidae

Balanus sp. Animals Arthropoda Maxillopoda Sessilia Balanidae

Jaera marina** Animals Arthropoda Malacostraca Isopoda Janiridae

Etone sp. Animals Annelida Polychaeta Phyllodocida Phyllodocidae

Fabricia sabella Animals Annelida Polychaeta Sabellida Fabriciidae

Lepidonotus squamatus Animals Annelida Polychaeta Phyllodocida Polynoidae

Nereis sp. Animals Annelida Polychaeta Phyllodocida Nereididae

Pectinaria gouldii Animals Annelida Polychaeta Terebellida Pectinariidae Phyllodocidae Animals Annelida Polychaeta Phyllodocida

Phyllodoce maculata Animals Annelida Polychaeta Phyllodocida Phyllodocidae

Oligochaeta sp. Animals Annelida Clitellata (oligochaeta)

Cyanophthalma obscura Animals Nermertea Enopla Monostilifera Tetrastemmatidae

Nemerta Animals Nermertea

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Table S2. Summary of repeated measures ANOVAs showing the effects among Periods (2 to 4;

Period 1 was excluded in this analysis) of canopy (Ca), grazer (Gr) and nutrient enrichment (Nu)

treatments and crossed factors on a) % cover, b) richness, and c) Simpson’s index of diversity of the

associated species of the community. Significant values are shown in bold.

df

F Ratio

p

df

F Ratio p

a) % Cover

b) Richness

Between subjects

Between subjects

Ca 1

0.4791

0.4955

Ca 1

49.9307

<.0001

Gr 1

1.6410

0.2124

Gr 1

0.7426

0.3974

Nu 1

0.0252

0.8752

Nu 1

0.0297

0.8646

CaxGr 1

0.0575

0.8125

CaxGr 1

3.5941

0.0701

CaxNu 1

1.2562

0.2735

CaxNu 1

0.2673

0.6099

GrxNu 1

0.2039

0.6557

GrxNu 1

8.5842

0.0073

CaxGrxNu 1

1.9641

0.1739

CaxGrxNu 1

0.2673

0.6099

Residual 24

Residual 24

Within subjects

Within subjects

Period 2

2.4870

0.0938

Period 2

181.16

<.0001

Period x Ca

2

0.8563

0.4311

Period x Ca

2

10.666

0.0001

Period x Gr

2

0.8079

0.4518

Period x Gr

2

0.2558

0.7754

Period x Nu

2

0.8965

0.4147

Period x Nu

2

0.0484

0.9528

Period x CaxGr

2

0.8412

0.4375

Period x CaxGr

2

0.1313

0.8772

Period x CaxNu

2

0.3138

0.7321

Period x CaxNu

2

1.3894

0.2591

Period x GrxNu

2

2.5536

0.0883

Period x GrxNu

2

3.6152

0.0345

Period x CaxGrxNu 2

0.9655

0.3881

Period x CaxGrxNu 2 0.1452 0.8653

Residual 48

Residual 48

df

F Ratio

p

c) Diversity*

Between subjects

Ca 1

1.2167

0.2810

Gr 1

2.4978

0.1271

Nu 1

0.4291

0.5187

CaxGr 1

9.0454

0.0061

CaxNu 1

0.5752

0.4556

GrxNu 1

0.0617

0.8060

CaxGrxNu 1

0.4469

0.5102

Residual 24

Within subjects

Period 2

4.8607

0.0120

Period x Ca

2

1.3092

0.2795

Period x Gr

2

0.7229

0.4905

Period x Nu

2

0.0324

0.9681

Period x CaxGr

2

0.0508

0.9505

Period x CaxNu

2

0.9447

0.3959

Period x GrxNu

2

0.4969

0.6115

Period x CaxGrxNu 2 0.0484 0.9528

Residual 48

*Mauchly’s test of sphericity only failed for Diversity, however conclusions remains unchanged irrespective of

whether adjusted or unadjusted df and p-values from Huynh-Feldt or Greenhouse-Geisser corrections are used.

Figure

Table S1. Taxa list (with classification) found during the sampling period at Sainte-Flavie, Quebec, Canada

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