The following supplement accompanies the article
Impacts of physical disturbance on ecosystem structure in subtropical seagrass meadows
Amanda S. Bourque*, W. Judson Kenworthy, James W. Fourqurean
*Corresponding author: [email protected]
Marine Ecology Progress Series 540: 27–41 (2015)
Table S1. Summary of study sites and sampling intensity per site. Site age is time (years) since disturbance rounded to the nearest 6-month increment. Benthic quadrat count is per site, with an equivalent number sampled in the reference area for each site.
Name Age Area Depth # soil # infauna # benthic Code (yr) (m2) (m) cores cores quadrats AC 0 10 0.7 1 1 4 CZ 0 12 0.4 1 1 9 MF 0 27 0.2 1 1 8 BO 0 32 0.3 1 1 13 DP 1 16 0.2 1 1 6 GN 1 38 1.6 1 1 13 MO 3 2 0.5 1 1 3 CO 3 38 0.6 1 1 15 VB 3 41 0.3 1 1 16 NB 4 9 1.0 1 1 7 GO 4 20 0.2 1 1 8 CB12 5 4 0.1 3 3 3 CB1 5 26 0.4 3 3 10 CB6 5 27 0.4 3 3 11
1" " Table S2. Phylogenetic list of invertebrate taxa and observed frequencies sampled from disturbed and adjacent reference sites.
Phylum/Subphylum Class/Subclass Superorder Order Disturbance Reference Total Annelida Clitellata/Oligochaeta 166 229 395 Annelida Polychaeta 363 880 1,243 Arthropoda/Chelicerata Pycnogonida 1 1 Arthropoda/Crustacea Cephalocarida 4 7 11 Arthropoda/Crustacea Malacostraca/Eumalacostraca Peracarida Amphipoda 80 262 342 Arthropoda/Crustacea Malacostraca/Eumalacostraca Peracarida Cumacea 25 89 114 Arthropoda/Crustacea Malacostraca/Eumalacostraca Peracarida Isopoda 22 37 59 Arthropoda/Crustacea Malacostraca/Eumalacostraca Peracarida Mysida 2 1 3 Arthropoda/Crustacea Malacostraca/Eumalacostraca Peracarida Tanaidacea 27 114 141 Arthropoda/Crustacea Malacostraca Eucarida Decapoda - crabs 7 13 20 Arthropoda/Crustacea Malacostraca Eucarida Decapoda - shrimp 7 7 Arthropoda/Crustacea Ostracoda 20 27 47 Amphioxiformes/ Branchiostomidae/ Chordata/Cephalochordata Leptocardii 1 1 Branchiostoma Chordata/Tunicata Ascidiacea 2 2 Cnidaria/Medusozoa Hydrozoa 4 1 5 Cnidaria Anthozoa 1 4 5 Echinodermata/Asterozoa Ophiuroidea 9 32 41 Echinodermata/Echinozoa Holothuroidea 1 1 Mollusca Aplacophora /Solenogastres (Noemeniomorpha) 2 2 Mollusca Bivalvia 20 26 46 Mollusca Gastropoda 16 22 38 Mollusca Gastropoda, Clade Nudibranchia) 4 4 Mollusca Polyplacophora (Amphineura) 4 15 19 Nematoda 392 525 917 Nemertinea 30 95 125 Phoronida 1 1 Platyhelminthes 2 2 Porifera Hexactinellida 4 4 Sipuncula Sipunculidea 12 27 39 total per group 1,209 2,426 3,635
2" " Table S3. Pearson correlations (r > 0.2) between invertebrate taxa and principle coordinates analysis (PCO) axes from the PCO ordination (see Fig. 5) of samples from vessel grounding disturbed and adjacent reference sites.
Invertebrate Taxon PCO1 PCO2 Amphineura (Polyplacophora) 0.49 0.29 Amphipoda 0.53 0.64 Anthozoa 0.53 0.16 Aplacophora (Neomeniomorpha) 0.28 -0.04 Bivalvia 0.57 -0.53 Branchiostoma 0.37 -0.21 Cephalocarida -0.38 0.01 Cumacea 0.28 0.74 Decapoda - Crabs 0.35 -0.28 Decapoda - Shrimp -0.05 0.57 Gastropoda 0.47 -0.32 Gastropoda (nudibranch) 0.49 -0.08 Isopoda 0.81 0.19 Nematoda 0.31 0.37 Nemertinea 0.83 -0.11 Oligochaeta 0.51 -0.24 Ophiuroidea 0.73 -0.33 Ostracoda 0.53 -0.38 Polychaeta 0.78 0.04 Sipunculida 0.29 0.65 Tanaidacea 0.88 0.15
Table S4. SIMPER analysis results of taxonomic similarity for disturbed and adjacent reference sites.
Within Group Most abundant % contribution to Groups Mean Similarity (%) taxa group similarity Disturbance 58.1 Polychaeta 38.6 Nematoda 26.9 Oligochaeta 17.9 Amphipoda 4.2 Nemertinea 3.9 Reference 58.6 Polychaeta 32.8 Nematoda 23.4 Amphipoda 13.0 Oligochaeta 12.8 Nemertinea 4.3 Isopoda 3.9
3" "