Ecography ECOG-05155Lindo, Z. 2020. Transoceanic dispersal of terrestrial species by debris rafting. – Ecography doi: 10.1111/ecog.05155

Supplementary material

Appendix 1

Table A1. List of sample locations from Graham Island, Haida Gwaii, British Columbia.

Sample Site Latitude (N) Longitude (W) Location Sampling notes

Haida_1 forest 54.018067 132.122083 North Beach Cedar, Sitka, and hemlock; moss and LFH

Haida_2 forest 54.018764 132.125607 North Beach Cedar, Sitka, and hemlock; moss and CWD

Haida_4 beach 54.047503 132.182895 North Beach plastic bottles and other plastics

Haida_5 edge 54.047581 132.182929 North Beach edge with sea grass vegetation

Haida_6 forest 54.046529 132.180392 North Beach 10m into Sitka and hemlock forest; moss and LFH

Haida_7 forest 54.045624 132.183870 North Beach Sitka and hemlock, LFH and moss

Haida_8 beach 54.040249 131.925280 North Beach sand dunes with tall grasses; pop bottles at high tide

Haida_9 edge 54.039479 131.927167 North Beach 20m into alder and Sitka forest; lanky and beaked mosses

Haida_13 edge 54.077751 131.795506 North Beach gravel and sandstone approx. 50m from shore; needle

layer from short, wind-swept Sitka thicket

Haida_14 beach 54.077235 131.796773 North Beach mostly dune grass wrack

Haida_15 beach 54.076359 131.785030 North Beach pop bottles and rope

Haida_16 beach 54.080275 131.774873 North Beach pop bottles and rope

Haida_17 forest 54.082858 131.768663 North Beach Sitka and salal forest; feathermoss

Haida_18 beach 54.090640 131.674232 East Beach pop bottles and other plastics

Haida_20 beach 54.094432 131.673694 East Beach mostly dune grass wrack

Haida_21 edge 54.090567 131.674571 East Beach first trees on sand dunes; moss on base on tree roots

Haida_22 edge 54.091134 131.675216 East Beach edge of lagoon area where sand dunes meet rushes; rush

litter on sand surface

Haida_23 beach 54.091397 131.674200 East Beach various plastics

Haida_44 beach 53.633246 131.923603 East Beach near Pestula shipwreck; various beach debris with plastics

Haida_45 beach 53.633990 131.924088 East Beach near Pestula shipwreck; various beach debris with plastics

Haida_47 beach 53.629846 131.926539 East Beach plastics, pop bottles

Haida_48 beach 53.623842 131.930640 East Beach dune and tidal estuary; plastic fragments and pop bottles

Haida_49 edge 53.617492 131.934360 East Beach bottom of sheltered hill slope beside sandy beach; mosses

Haida_57 beach 53.542101 131.946033 East Beach rope, pop bottles, driftwood

Haida_70 edge 53.517471 131.957746 East Beach moss near rocky beach

Haida_71 beach 54.100567 131.732317 North Beach near small boat shipwreck; bottles and other plastics

Haida_72 forest 54.100536 131.731855 North Beach wind-swept forest; LFH layer and mosses

Haida_73 edge 54.100574 131.731973 North Beach at forest edge; moss on sandy log with dune grass

Haida_74 beach 54.114071 131.712786 North Beach dunes and cobble; beach debris with plastics

Haida_75 beach 54.127196 131.697379 North Beach rocky beach; driftwood and plastic debris

LFH – well developed organic soil horizon with litter, fermentation, and humus layers.

CWD – coarse woody debris on forest floors

1

Table A2. Species list of oribatid mites (Acari: Oribatida) sampled from forest, beach and edge 1 habitat along the north and east shores of Haida Gwaii, British Columbia, Canada. Italicized 2 numbers beside species names are number of specimens collected. 3 Family Species* Previously known in

Canada/Alaska⁑

Palaeacaridae Palaeacarus hystricinus Trägårdh, 1932 [1] AK, YT, NT, BC, ON,

QC, NF

Brachychthoniidae Neoliochthonius sp. [2] --

Liochthonius sp. 1 [60] --

Liochthonius sp. 2 [13] --

Liochthonius sp. 3 [5] --

Liochthonius sp. 4 [8] --

Poecilochthonius sp. [1] --

Pterochthoniidae Pterochthonius angelus (Berlese, 1910) [1] BC, AB, QC

Hypochthoniidae Hypochthonius rufulus C.L. Koch, 1836 [25] AK, YT, NT, AB, MB,

ON, QC, NS, NL

Perlohmanniidae Perlohmannia sp. [3] BC; undescribed species

Epilohmanniidae Epilohmannia sp. [90] BC; undescribed species

Euphthiracaridae Euphthiracarus cernuus Walker, 1965 [5] BC, NS

Euphthiracarus monyx Walker, 1965 [9] coastal BC

Oribotritiidae Microtritia sp. [32] BC; undescribed species

Maerkelotritia kishidai (Aoki, 1958) [8] coastal AK, coastal BC

(Japan)

Phthiracaridae Phthiracarus cognatus Niedbała, 1988 [306] coastal BC, SK, ON

Phthiracarus sp. [70] --

Crotoniidae Platynothrus peltifer (C.L. Koch, 1839) [13] AK, YT, NT, NU, BC,

AB, ON, QC, NS, NL

Hermanniidae Hermannia gibba (C.L. Koch, 1839) [17] AK, coastal BC

Hermannia hokkaidensis Aoki and Ohnishi,

1974 [72]

coastal YT (Japan)

Hermannia reticulata Thorell, 1871 [68] AK, YT, NT, NU, QC

2

Nanhermanniidae Nanhermannia elegantula Berlese, 1913

[177]

coastal BC, QC, NS

Hermanniellidae Hermanniella occidentalis Ewing, 1918 [15] BC, QC

Damaeidae Damaeidae sp. 1 nr Dyobelba [11] coastal BC

Damaeidae sp. 2 nr Dyobelba [2] probable new species

Damaeidae sp. 3 [7] probable new species

Belba (Protobelba) californica (Banks, 1904)

[3]

coastal BC

Cepheidae Cepheus sp. [1] probable new species

Conoppia sp. [1] BC; undescribed species

Eupterotegaeus rhamphosus Higgins and

Woolley, 1968 [26]

coastal BC, AB

Hungarobelbidae Hungarobelba sp. [4] BC; undescribed species

Megeremaeidae Megeremaeus montanus Higgins and

Woolley, 1965 [2]

coastal BC

Astegistidae Cultroribatula nr bicultrata (Berlese, 1905)

[16]

coastal BC; undescribed

species

Cultroribatula sp. [2] probable new species

Liacaridae Dorycranosus sp. [14] probable new species

Liacarus bidentatus Ewing, 1918 [47] AK, YT, NU, coastal BC

Procorynetes sp. [50] probable new species

Peloppiidae Ceratoppia indentata Lindo, 2011 [54] coastal BC

Ceratoppia longicuspis Lindo, 2011 [16] coastal BC

Ceratoppia quadridentata (Haller, 1882) [5] AK, YT, NT, NU, BC,

AB, QC, NL

Ceratoppia valerieae Lindo, 2011 [4] BC, AB

Tenuialidae Peltenuiala pacifica Norton, 1983 [4] coastal BC

Tenuliala sp. [1] BC; undescribed species

Autognetidae Autogneta sp. [1] BC; undescribed species

Oppiidae Oppiidae nr Aeroppia sp. [42] BC; undescribed species

Lauroppia sp. [2] --

3

Oppiella nova (Oudemans, 1902) [479] cosmopolitan

Oppia sp. [2] --

Ramusella sp. [64] probable new species

Quadroppiidae Quadroppia quadricarinata (Micheal, 1885)

[110]

coastal BC

Thyrisomidae Banksinoma lanceolata canadensis Fujikawa,

1979 [22]

AK, YT, coastal BC

Pantelozetes sp. [8] probable new species

Suctobelbidae Suctobelbella sp. 1 [55] coastal BC

Suctobelbella sp. 2 [7] coastal BC

Suctobelbella sp. 3 [1] --

Allosuctobelba sp. [1] --

Tectocephidae Tectocepheus velatus (Michael, 1880) [100] cosmopolitan

Limnozetidae Limnozetes nr palmerae Behan-Pelletier, 1989

[1]

probable new species

Scutoverticidae Scutovertex sp. [16] probable new species

Phenopelopidae Eupelops cf japonensis Fujikawa, 1990 [7] coastal BC (Japan)

Eupelops sp. [2] probable new species

Achipteriidae Achipteria nr serrata Hirauchi and Aoki,

1997 [120]

coastal BC; undescribed

species (Japan)

Achipteria sp. [20] probable new species

Tegoribatidae Protectoribates occidentalis Behan-Pelletier,

2017 [98]

coastal BC

Oribatellidae Oribatella arctica Thor, 1930 [34] AK, YK, NT, NU, MB

Oribatella banksi Behan-Pelletier and Walter,

2012 [4]

coastal BC, AB

Oribatella sintranslamella Behan-Pelletier

and Walter, 2012 [7]

coastal BC

Haplozetidae Protoribates sp. [4] coastal BC; undescribed

species

Scheloribatidae Paraphauloppia sp. 1 [4] probable new species

4

Paraphauloppia sp. 2 [1] probable new species

Parapirnodus hexaporosus Behan-Pelletier,

Clayton and Humble, 2002 [2]

coastal BC

Scheloribates sp. 1 [50] coastal BC

(Eu)Scheloribates sp. 2 [30] coastal BC

Scheloribates (Liebstadia) sp. 3 [35] --

Ceratozetidae Ceratozetes pacificus Behan-Pelletier, 1984

[56]

coastal BC

Ceratozetes thienemanni Willmann, 1943 [1] AK, YT, NT, NU, BC and

across boreal Canada

Melanozetes crossleyi Behan-Pelletier, 2000

[24]

coastal BC

Ghilarovizetes sp. [1] probable new species

Sphaerozetes arcticus Hammer, 1952 [11] AK, YT, NT, NU and

across boreal Canada

Sphaerozetes winchesteri Behan-Pelletier,

2000 [5]

coastal BC

Chamobatidae Chamobates sp. [7] coastal BC; undescribed

species

Punctoribatidae Ceresella sp. [4] probable new species

Mycobates sp. [1] probable new species

Punctoribates ezoensis Fujikawa, 1982 [2] coastal BC§ (Japan)

Scutozetes sp. [3] probable new species

Zachvatkinibates maritimus Shaldybina, 1973

[53]

coastal BC, AK, YT

Zachvatkinibates schatzi Behan-Pelletier and

Eamer, 2005 [17]

coastal BC

Galumnidae Galumna sp. [5] --

* Species are listed taxonomically by family and genera, and include naming authorities. 4

- Species listed as nr (near) share many of the same character states as the named species 5

but have at least one key character divergent, and are therefore likely a different species. 6

5

- Species listed as cf (confirm) are likely the named species, but cannot be confirmed from 7

the literature alone (i.e., species description is poor or ambiguous). 8

- Species listed as sp. are undescribed species that may have been previously sampled and 9

known from other records but do not match any current descriptions in the literature. 10

⁑ Known distributions are based on Behan-Pelletier and Lindo (2019) as well as specimens in the 11

personal collections of the author based on extensive sampling in coastal British Columbia (BC), 12

and any recorded specimens observed in the curated collections at the Canadian National 13

Collections of Insects, Arachnids and Nematodes in Ottawa, Ontario, Canada. 14

- Records for State, Provinces and Territories are abbreviated and in the following order, 15

trending from northwest to east: AK: Alaska; YT: Yukon; NT: Northwest Territories; 16

NU: Nunavut; BC: British Columbia; AB: Alberta; SK: Saskatchewan; MB: Manitoba; 17

ON: Ontario; QC: Québec; NB: New Brunswick; NS: Nova Scotia; NL: Newfoundland; 18

PE: Prince Edward Island. 19

- When listed as “BC”, this includes records from non-coastal parts of the province as well 20

as potentially coastal areas. 21

- When listed as “coastal BC”, records are only from coastal temperate rainforest habitats 22

along the west coast of the province. 23

- Species listed as ‘undescribed species’ are designated as sp. but have previously been 24

recorded from BC prior to this study based on comparisons of specimens held within 25

taxonomic collections. 26

- Species listed as “probably new species” are species designated as sp. that have not been 27

previously recorded from BC prior to this study based on comparisons of specimens held 28

within taxonomic collections. 29

- Species listed as ‘--’ lack sufficient taxonomic knowledge to assess. 30

§ Punctoribates ezoensis Fujikawa 1982 is very similar to Punctoribates punctum (C.L. Koch, 31

1839) that has been recorded as having a disjunct and ‘curious’ distribution in North America; it 32

has been recorded from the west coast of Canada (coastal BC) and the Atlantic maritime regions 33

(NB, NS, NL) (Behan-Pelletier and Eamer, 2008). It is likely that P. punctum previously found 34

in coastal BC is actually P. ezoensis. 35

36

CANADA

Paci�c Ocean

NHaida Gwaii

50 km

North Beach

East B

each