Species assemblages of the rocky intertidal at Helgoland (German Bight, North Sea), exposed shore
type: Dataset
creator: Katharina Reichert
publisher: PANGAEA
  type: Organization
  disambiguating description: Data Publisher for Earth & Environmental Science
included in data catalog: PANGAEA
  type: DataCatalog
  disambiguating description: Data Publisher for Earth & Environmental Science
date published: 2008
additional type: dataset
description: Environmental variables Exposed (erosion rates of gypsum blocks : 0.14-0.16 g/h; during westerly winds (force 4-5) which are prevailing around Helgoland rates reaches 0.28 g/h (de Kluijver, 1991). Mostly relative natural red sandstone; gently sloping substratra; average tidal range: ca. 2.5 m; geomorphological structure: channels (mean height to NN: ca. -1.50 m; width: ca. 2-20 m) and ridges (mean height to NN: ca. -1.00 m; width: ca. 5-25 m) showed a more irregular pattern as the semi-exposed study location: the ridges form discrete patches enclosed by channels which also submerged during low tide. Due to the seawall along the western part of the island the high- and mid-shore assemblages were basically not existent in the western study location. […]
citation: Temporal and spatial scales in species assemblages of the rocky intertidal at Helgoland (German Bight, North Sea)
spatial coverage: Place
  geo: GeoCoordinates
    latitude: 54.1854
    longitude: 7.8726
temporal coverage: 2004-07-01T12:00:00/2006-04-01T12:00:00
size: QuantitativeValue
  value: 22000.0
  unit text: data points
variable measured: DATE/TIME
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variable measured: DEPTH, sediment/rock
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    has defined term: sediment
    has defined term: rock
    has defined term: Length
variable measured: Habitat
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variable measured: Sample code/label
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  description: Date, Transect, Plot, Quadrat
variable measured: Ulva spp., cover
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    has defined term: Ulva
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variable measured: Ulva lactuca, cover
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  unit text: %
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    has defined term: Ulva lactuca
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variable measured: Spongomorpha arcta, cover
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    has defined term: Spongomorpha arcta
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variable measured: Spongomorpha aeruginosa, cover
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variable measured: Cladophora sericea, cover
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    has defined term: Cladophora sericea
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variable measured: Cladophora rupestris, cover
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    has defined term: Cladophora rupestris
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variable measured: Dictyota dichotoma, cover
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variable measured: Porphyra leucosticta, cover
variable measured: Mastocarpus stellatus, cover
variable measured: Chondrus crispus, cover
variable measured: Rhodothamniella floridula, cover
variable measured: Corallina officinalis, cover
variable measured: Ceramium rubrum, cover
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variable measured: Polysiphonia spp., cover
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variable measured: Plumaria plumosa, cover
variable measured: Membranoptera alata, cover
variable measured: Plocamium cartilagineum, cover
variable measured: Bonnemaisonia hamifera, cover
variable measured: Rhodomela confervoides, cover
variable measured: Coccotylus truncatus, cover
variable measured: Polyides rotundus, cover
variable measured: Erythrotrichia reflexa, cover
variable measured: Rhodophysema elegans, cover
variable measured: Haemescharia hennedyi, cover
variable measured: Phymatolithon lenormandii, cover
variable measured: Hildenbrandia rubra, cover
variable measured: Leucosolenia botryoides, cover
variable measured: Halisarca dujardini, cover
variable measured: Halichondria panicea, cover
variable measured: Prosuberites epiphytum, cover
variable measured: Leuconia nivea, cover
variable measured: Laomedea flexuosa, cover
variable measured: Dynamena pumila, cover
variable measured: Halecium spp., cover
variable measured: Coryne pusilla, cover
variable measured: Coryne muscoides, cover
variable measured: Actiniaria, cover
variable measured: Sagartia troglodytes, cover
comment: Environmental variables Exposed (erosion rates of gypsum blocks : 0.14-0.16 g/h; during westerly winds (force 4-5) which are prevailing around Helgoland rates reaches 0.28 g/h (de Kluijver, 1991). Mostly relative natural red sandstone; gently sloping substratra; average tidal range: ca. 2.5 m; geomorphological structure: channels (mean height to NN: ca. -1.50 m; width: ca. 2-20 m) and ridges (mean height to NN: ca. -1.00 m; width: ca. 5-25 m) showed a more irregular pattern as the semi-exposed study location: the ridges form discrete patches enclosed by channels which also submerged during low tide. Due to the seawall along the western part of the island the high- and mid-shore assemblages were basically not existent in the western study location. Sampling design At each study location all plots were sampled at 3-month intervals over 2 years (summer 2004 - spring 2006). All plots at each location were sampled at each 3-month interval within a period of a few days. Transect: 2 transects (7-10 m long, 45 m apart); plot: 2 and 3 plots respectively (4-10 m apart) along each transect; quadrat: 5 quadrats (50x50 cm, < 1 m apart) within each plot. All spatial scales were established at low-shore. Species list 1. Structural layers Top layer (TL) , i.e. a structural layer usually consisted of thalli of large brown algae (e.g. Fucus spp., Laminaria spp.); encrusting layer (EL) , i.e. a structural layer which is formed by epilithic organisms adhering directly to the substratum (e.g. Phymatolithon spp., Ralfsia spp. or bryozoans). All other species which are not labelled with TL or EL be part of the middle layer, i.e. a structural layer which is represented by epiphytic, epizoic and endozoic species growing erect from the substrate, but not reaching the top layer. 2. Species complex Some species were combined into a complex if the taxonomic position was tentative or if the morphological distinctions between two species were difficult to quantify (e.g. Monostroma grevillei/artic…
conditions of access: access rights needed
is accessible for free: false
language: en

Katharina Reichert
type: Person
family name: Reichert
given name: Katharina

Temporal and spatial scales in species assemblages of the rocky intertidal at Helgoland (German Bight, North Sea)
type: CreativeWork
type: Thesis
creator: Katharina Reichert
date published: 2008
pagination: 171 pp
source organization: University Hamburg, Germany
additional type: dissertation

Time
type: DefinedTerm
alternate name: T

depth
type: DefinedTerm

Length
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alternate name: L

habitat
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Ulva
type: DefinedTerm

Dimensionless Ratio
type: DefinedTerm
alternate name: ψ

Ulva lactuca
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Spongomorpha arcta
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Spongomorpha aeruginosa
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Cladophora sericea
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Cladophora rupestris
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Cladophora albida
type: DefinedTerm

Rhizoclonium tortuosum
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Chaetomorpha aerea
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Monostroma grevillei
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Urospora
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complex
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Bryopsis lyngbyei
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Blidingia minima
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Codium fragile
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Fucus serratus
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Fucus vesiculosus
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Sphacelaria radicans
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Ectocarpaceae
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Cladostephus spongiosus
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Elachista fucicola
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Punctaria plantaginea
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Ralfsia verrucosa
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Laminaria digitata
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Sargassum muticum
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Dictyota dichotoma
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Porphyra umbilicalis
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Porphyra leucosticta
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Mastocarpus stellatus
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Chondrus crispus
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Rhodothamniella floridula
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Corallina officinalis
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Ceramium rubrum
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Ceramium deslongchampsii
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Dumontia contorta
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Polysiphonia
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Polysiphonia fibrillosa
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Cystoclonium purpureum
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Plumaria plumosa
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Membranoptera alata
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Plocamium cartilagineum
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Bonnemaisonia hamifera
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Rhodomela confervoides
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Coccotylus truncatus
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Polyides rotundus
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Erythrotrichia reflexa
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Rhodophysema elegans
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Haemescharia hennedyi
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Phymatolithon lenormandii
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Hildenbrandia rubra
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Leucosolenia botryoides
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Halisarca dujardini
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Halichondria panicea
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Prosuberites epiphytum
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Leuconia nivea
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Laomedea flexuosa
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Dynamena pumila
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Halecium
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Coryne pusilla
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Coryne muscoides
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Actiniaria
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Sagartia troglodytes
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Sagartiogeton undatus
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Craterolophus convolvulus
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Mytilus edulis
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Pholas dactylus
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Lanice conchilega
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Pomatoceros triqueter
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Thoracica
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Electra pilosa
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Cryptosula pallasiana
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Scrupocellaria scruposa
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Celleporella hyalina
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Callopora lineata
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Flustrellidra hispida
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Alcyonidium gelatinosum
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Bowerbankia imbricata
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Walkeria uva
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Obelia dichotoma
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Didemnum maculosum
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Sidnyum turbinatum
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Botryllus schlosseri
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Molgula complanata
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Lineus ruber
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Lineus bilineatus
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Oerstedia dorsalis
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Nymphon rubrum
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Amphiporus lactifloreus
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Lepidochitona cinerea
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Lacuna pallidula
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Lacuna vincta
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Gibbula cineraria
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Littorina littorea
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Littorina mariae
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Rissoa parva
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Onoba aculeus
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Nucella lapillus
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Elysia viridis
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Limapontia senestra
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Polycera quadrilineata
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Amphipholis squamata
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Asterias rubens
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Laminaria digitata, cover
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Sargassum muticum, cover
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Porphyra umbilicalis, cover
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Porphyra leucosticta, cover
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Ceramium rubrum, cover
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Polysiphonia spp., cover
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Polysiphonia fibrillosa, cover
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Thoracica, cover
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  has defined term: Thoracica
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Electra pilosa, cover
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subject of: DefinedTermSet
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Electra pilosa, cover
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unit text: %
measurement technique: Estimated
description: encrusting layer
subject of: DefinedTermSet
  has defined term: Electra pilosa
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Cryptosula pallasiana, cover
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unit text: %
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  has defined term: Cryptosula pallasiana
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Scrupocellaria scruposa, cover
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unit text: %
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Celleporella hyalina, cover
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  has defined term: Celleporella hyalina
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Callopora lineata, cover
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  has defined term: Callopora lineata
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Flustrellidra hispida, cover
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unit text: %
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  has defined term: Flustrellidra hispida
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Flustrellidra hispida, cover
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unit text: %
measurement technique: Estimated
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  has defined term: Flustrellidra hispida
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Alcyonidium gelatinosum/mytili complex, cover
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unit text: %
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  has defined term: Alcyonidium gelatinosum
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Bowerbankia imbricata, cover
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unit text: %
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  has defined term: Bowerbankia imbricata
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Walkeria uva, cover
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unit text: %
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subject of: DefinedTermSet
  has defined term: Walkeria uva
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Obelia dichotoma, cover
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unit text: %
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subject of: DefinedTermSet
  has defined term: Obelia dichotoma
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Didemnum maculosum, cover
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unit text: %
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description: encrusting layer
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  has defined term: Didemnum maculosum
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Sidnyum turbinatum, cover
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unit text: %
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  has defined term: Sidnyum turbinatum
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Botryllus schlosseri, cover
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  has defined term: Botryllus schlosseri
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Botryllus schlosseri, cover
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unit text: %
measurement technique: Estimated
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  has defined term: Botryllus schlosseri
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Molgula complanata, cover
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unit text: %
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  has defined term: Molgula complanata
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Lineus ruber, cover
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unit text: %
measurement technique: Estimated
subject of: DefinedTermSet
  has defined term: Lineus ruber
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Lineus bilineatus, cover
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unit text: %
measurement technique: Estimated
subject of: DefinedTermSet
  has defined term: Lineus bilineatus
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Oerstedia dorsalis, cover
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subject of: DefinedTermSet
  has defined term: Oerstedia dorsalis
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Nymphon rubrum, cover
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unit text: %
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  has defined term: Nymphon rubrum
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Amphiporus lactifloreus, cover
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  has defined term: Amphiporus lactifloreus
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Lepidochitona cinerea, cover
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unit text: %
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  has defined term: Lepidochitona cinerea
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Lacuna pallidula, cover
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unit text: %
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  has defined term: Lacuna pallidula
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Lacuna vincta, cover
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unit text: %
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subject of: DefinedTermSet
  has defined term: Lacuna vincta
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Gibbula cineraria, cover
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unit text: %
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subject of: DefinedTermSet
  has defined term: Gibbula cineraria
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Littorina littorea, cover
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unit text: %
measurement technique: Estimated
subject of: DefinedTermSet
  has defined term: Littorina littorea
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Littorina mariae/obtusata complex, cover
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unit text: %
measurement technique: Estimated
subject of: DefinedTermSet
  has defined term: Littorina mariae
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Rissoa parva, cover
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unit text: %
measurement technique: Estimated
subject of: DefinedTermSet
  has defined term: Rissoa parva
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Onoba aculeus, cover
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unit text: %
measurement technique: Estimated
subject of: DefinedTermSet
  has defined term: Onoba aculeus
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Nucella lapillus, cover
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unit text: %
measurement technique: Estimated
subject of: DefinedTermSet
  has defined term: Nucella lapillus
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Elysia viridis, cover
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unit text: %
measurement technique: Estimated
subject of: DefinedTermSet
  has defined term: Elysia viridis
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Limapontia senestra, cover
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unit text: %
measurement technique: Estimated
subject of: DefinedTermSet
  has defined term: Limapontia senestra
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Polycera quadrilineata, cover
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unit text: %
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subject of: DefinedTermSet
  has defined term: Polycera quadrilineata
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Amphipholis squamata, cover
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unit text: %
measurement technique: Estimated
subject of: DefinedTermSet
  has defined term: Amphipholis squamata
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Asterias rubens, cover
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unit text: %
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subject of: DefinedTermSet
  has defined term: Asterias rubens
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