Contributors | Affiliation | Role |
---|---|---|
Edwards, Matthew | San Diego State University (SDSU) | Principal Investigator |
Konar, Brenda | University of Alaska Fairbanks (UAF) | Co-Principal Investigator |
Metzger, Jacob R. | University of Alaska Fairbanks (UAF) | Contact |
Copley, Nancy | Woods Hole Oceanographic Institution (WHOI BCO-DMO) | BCO-DMO Data Manager |
This dataset includes community abundance measured as number per square meter. These data are presented in Metzger et al, 2019.
Sampling locations were from the Aleutian Archipelago nearshore between longitude 173.9 and -167.6 in June 2016 and July 2017. The average depth 17.5 ft.
To assess community structure at each site, two methods were used. First, to quantify the remainder of the epibenthic community, ten 0.25 m2 quadrats were haphazardly placed within each site. Within these quadrats, the percent bottom cover was visually estimated for bare substrate, kelp holdfasts, suspension feeders, pulvinate green algae (Codium spp.), and non-geniculate coralline algae - with differentiation made between Clathromorphum spp. and other encrusting coralline species.
Following visual estimation, all epibenthic organisms—excepting those strongly adhered to the substrate (e.g., barnacles, non-geniculate coralline algae, etc.)— were scraped from the substrate and placed in fine mesh collection bags for shipboard identification, and abundance and biomass determination. Second, three 10 m x 2 m swaths were placed haphazardly within each site. Within each swath, E. fistulosa stipes were counted, midwater and demersal fishes visually quantified by trained divers, and Also, all conspicuous, sparsely distributed large mobile invertebrates (i.e., sea stars, crab, and large gastropods with distributions assumed to be less than 1 per 2.5 m2, the total area covered by the above quadrats) were collected in fine mesh bags for shipboard abundance and biomass determination. Once onboard, organisms were identified to the lowest possible taxa, counted (if the species occur as discrete individuals) and weighed using hanging spring scales to determine biomass to the nearest .005 kg. Ambiguous or difficult to identify individuals were preserved in 10% formalin (for invertebrates) or pressed (for algae) for later identification.
All statistical analyses were done using PRIMER-E v. 7.0.13 (Clarke and Gorley 2015). Prior to multivariate analyses, abundance and biomass data were standardized to m2 to allow for pooling across sampling methods using Microsoft Excel for Mac v.16.9.
BCO-DMO Processing Notes:
- added conventional header with dataset name, PI name, version date
- modified parameter names to conform with BCO-DMO naming conventions
- added Lat and Long columns from sampling site dataset
- reduced decimal precision of depth and depth_stdev from 13 decimal places to 1; reduced abundance columns from 16 decimal places to 2 or none for 0.
- corrected spelling of 6 taxa to agree with World Register of Marine Species names
File |
---|
abundance.csv (Comma Separated Values (.csv), 33.23 KB) MD5:67aaec14842103554539db4b908a30e0 Primary data file for dataset ID 727180 |
Parameter | Description | Units |
Site | sampling site identifer | unitless |
Lat | latitude; north is positive | decimal degrees |
Long | longtude; east is positive | decimal degrees |
Island | island name | unitless |
Habitat | type of habitat: kelp; barren; transition | unitless |
Region | East-west sampling region | unitless |
Year | year of sampling | unitless |
Depth_avg_ft | average sampling depth | feet |
Depth_stdev | sampling depth standard deviation | feet |
Acanthodoris_spp | Abundance of Acanthodoris spp. | number/meter^2 |
Acmaea_mitra | Abundance of Acmaea mitra | number/meter^2 |
Acropora_spp | Abundance of Acropora spp. | number/meter^2 |
Actiniaria_spp | Abundance of Actiniaria spp. | number/meter^2 |
Agarum_clathratum | Abundance of Agarum clathratum | number/meter^2 |
Agarum_clathrus | Abundance of Agarum clathrus | number/meter^2 |
Alaria_marginata | Abundance of Alaria marginata | number/meter^2 |
Alcyonacea_spp | Abundance of Alcyonacea spp. | number/meter^2 |
Alcyonidium_gelatinosum | Abundance of Alcyonidium gelatinosum | number/meter^2 |
Alcyonium_spp | Abundance of Alcyonium spp. | number/meter^2 |
Aleutiaster_schefferi | Abundance of Aleutiaster schefferi | number/meter^2 |
Amphipoda_spp | Abundance of Amphipoda spp. | number/meter^2 |
Annelida_spp | Abundance of Annelida spp. | number/meter^2 |
Anthozoa_spp | Abundance of Anthozoa spp. | number/meter^2 |
Arctomelon_tamikoae | Abundance of Arctomelon tamikoae | number/meter^2 |
Ariadnaria_insignis | Abundance of Ariadnaria insignis | number/meter^2 |
Ascidiacea_spp | Abundance of Ascidiacea spp. | number/meter^2 |
Balanus_spp | Abundance of Balanus spp. | number/meter^2 |
Bathymaster_spp | Abundance of Bathymaster spp. | number/meter^2 |
Beringius_spp | Abundance of Beringius spp. | number/meter^2 |
Boreotrophon_spp | Abundance of Boreotrophon spp. | number/meter^2 |
Brachiopoda_spp | Abundance of Brachiopoda spp. | number/meter^2 |
Buccinidae_spp | Abundance of Buccinidae spp. | number/meter^2 |
Callophyllis_spp | Abundance of Callophyllis spp. | number/meter^2 |
Cancer_spp | Abundance of Cancer spp. | number/meter^2 |
Caprellidae_spp | Abundance of Caprellidae spp. | number/meter^2 |
Caryophyllia_Caryophyllia_alaskensis | Abundance of Caryophyllia (Caryophyllia) alaskensis | number/meter^2 |
Ceramaster_arcticus | Abundance of Ceramaster arcticus | number/meter^2 |
Chlamys_rubida | Abundance of Chlamys rubida | number/meter^2 |
Cirripedia_spp | Abundance of Cirripedia spp. | number/meter^2 |
Colus_spp | Abundance of Colus spp. | number/meter^2 |
Constantinea_rosa_marina | Abundance of Constantinea rosa marina | number/meter^2 |
Cottoidea_spp | Abundance of Cottoidea spp. | number/meter^2 |
Crangonidae_spp | Abundance of Crangonidae spp. | number/meter^2 |
Crossaster_papposus | Abundance of Crossaster papposus | number/meter^2 |
Cryptochiton_stelleri | Abundance of Cryptochiton stelleri | number/meter^2 |
Cryptolithodes_sitchensis | Abundance of Cryptolithodes sitchensis | number/meter^2 |
Cryptolithodes_typicus | Abundance of Cryptolithodes typicus | number/meter^2 |
Cryptonatica_spp | Abundance of Cryptonatica spp. | number/meter^2 |
Cucumaria_spp | Abundance of Cucumaria spp. | number/meter^2 |
Dendrophylliidae_spp | Abundance of Dendrophylliidae spp. | number/meter^2 |
Derbesia_marina | Abundance of Derbesia marina | number/meter^2 |
Dermaturus_mandtii | Abundance of Dermaturus mandtii | number/meter^2 |
Diaulula_sandiegensis | Abundance of Diaulula sandiegensis | number/meter^2 |
Diodora_aspera | Abundance of Diodora aspera | number/meter^2 |
Distaplia_spp | Abundance of Distaplia spp. | number/meter^2 |
Doridoidea_spp | Abundance of Doridoidea spp. | number/meter^2 |
Elassochirus_gilli | Abundance of Elassochirus gilli | number/meter^2 |
Errantia_spp | Abundance of Errantia spp. | number/meter^2 |
Eualaria_fistulosa | Abundance of Eualaria fistulosa | number/meter^2 |
Eudistylia_vancouveri | Abundance of Eudistylia vancouveri | number/meter^2 |
Eunoe_spp | Abundance of Eunoe spp. | number/meter^2 |
Euphrosine_multibranchiata | Abundance of Euphrosine multibranchiata | number/meter^2 |
Evasterias_retifera | Abundance of Evasterias retifera | number/meter^2 |
Flabellina_trophina | Abundance of Flabellina trophina | number/meter^2 |
Fusitriton_oregonensis | Abundance of Fusitriton oregonensis | number/meter^2 |
Gastropoda_spp | Abundance of Gastropoda spp. | number/meter^2 |
Gersemia_spp | Abundance of Gersemia spp. | number/meter^2 |
Glebocarcinus_oregonensis | Abundance of Glebocarcinus oregonensis | number/meter^2 |
Halichondria_spp | Abundance of Halichondria spp. | number/meter^2 |
Halocynthia_aurantium | Abundance of Halocynthia aurantium | number/meter^2 |
Hemilepidotus_spp | Abundance of Hemilepidotus spp. | number/meter^2 |
Henricia_elachys | Abundance of Henricia elachys | number/meter^2 |
Henricia_gemma | Abundance of Henricia gemma | number/meter^2 |
Henricia_insignis | Abundance of Henricia insignis | number/meter^2 |
Henricia_iodinea | Abundance of Henricia iodinea | number/meter^2 |
Henricia_lineata | Abundance of Henricia lineata | number/meter^2 |
Henricia_oculata | Abundance of Henricia oculata | number/meter^2 |
Henricia_rhytisma | Abundance of Henricia rhytisma | number/meter^2 |
Henricia_sanguinolenta | Abundance of Henricia sanguinolenta | number/meter^2 |
Henricia_spp | Abundance of Henricia spp. | number/meter^2 |
Henricia_tumida | Abundance of Henricia tumida | number/meter^2 |
Henricia_uluudax | Abundance of Henricia uluudax | number/meter^2 |
Henricia_vermilion | Abundance of Henricia vermilion | number/meter^2 |
Heptacarpus_brevirostris | Abundance of Heptacarpus brevirostris | number/meter^2 |
Hexagrammos_spp | Abundance of Hexagrammos spp. | number/meter^2 |
Hiatella_arctica | Abundance of Hiatella arctica | number/meter^2 |
Hippasteria_phrygiana | Abundance of Hippasteria phrygiana aleutica | number/meter^2 |
Ischnochiton_spp | Abundance of Ischnochiton spp. | number/meter^2 |
Isopoda_spp | Abundance of Isopoda spp. | number/meter^2 |
Lacuna_spp | Abundance of Lacuna spp. | number/meter^2 |
Laingia_aleutica | Abundance of Laingia aleutica | number/meter^2 |
Laminaria_longipes | Abundance of Laminaria longipes | number/meter^2 |
Laminaria_setchellii | Abundance of Laminaria setchellii | number/meter^2 |
Laminaria_spp | Abundance of Laminaria spp. | number/meter^2 |
Laminaria_yezoensis | Abundance of Laminaria yezoensis | number/meter^2 |
Leptasterias_alaskensis | Abundance of Leptasterias alaskensis | number/meter^2 |
Leptasterias_aleutica | Abundance of Leptasterias aleutica | number/meter^2 |
Leptasterias_arctica | Abundance of Leptasterias arctica | number/meter^2 |
Leptasterias_asteira | Abundance of Leptasterias asteira | number/meter^2 |
Leptasterias_camtschatica | Abundance of Leptasterias camtschatica | number/meter^2 |
Leptasterias_derbeki | Abundance of Leptasterias derbeki | number/meter^2 |
Leptasterias_hexactis | Abundance of Leptasterias hexactis | number/meter^2 |
Leptasterias_hylodes | Abundance of Leptasterias hylodes | number/meter^2 |
Leptasterias_leptodoma | Abundance of Leptasterias leptodoma | number/meter^2 |
Leptasterias_ochotensis | Abundance of Leptasterias ochotensis | number/meter^2 |
Leptasterias_spp | Abundance of Leptasterias spp. | number/meter^2 |
Leptasterias_stolacantha | Abundance of Leptasterias stolacantha | number/meter^2 |
Leptasterias_tatei | Abundance of Leptasterias tatei | number/meter^2 |
Lethasterias_nanimensis | Abundance of Lethasterias nanimensis | number/meter^2 |
Leucilla_nuttingi | Abundance of Leucilla nuttingi | number/meter^2 |
Leukoma_staminea | Abundance of Leukoma staminea | number/meter^2 |
Limneria_spp | Abundance of Limneria spp. | number/meter^2 |
Lithodidae_spp | Abundance of Lithodidae spp. | number/meter^2 |
Littorina_spp | Abundance of Littorina spp. | number/meter^2 |
Lottia_instabilis | Abundance of Lottia instabilis | number/meter^2 |
Lottia_pelta | Abundance of Lottia pelta | number/meter^2 |
Lottia_persona | Abundance of Lottia persona | number/meter^2 |
Lottia_scutum | Abundance of Lottia scutum | number/meter^2 |
Margarites_spp | Abundance of Margarites spp. | number/meter^2 |
Metridium_spp | Abundance of Metridium spp. | number/meter^2 |
Modiolus_modiolus | Abundance of Modiolus modiolus | number/meter^2 |
Mopalia_ciliata | Abundance of Mopalia ciliata | number/meter^2 |
Musculus_discors | Abundance of Musculus discors | number/meter^2 |
Musculus_niger | Abundance of Musculus niger | number/meter^2 |
Musculus_spp | Abundance of Musculus spp. | number/meter^2 |
Nematoda_spp | Abundance of Nematoda spp. | number/meter^2 |
Nemertea_spp | Abundance of Nemertea spp. | number/meter^2 |
Neptunea_spp | Abundance of Neptunea spp. | number/meter^2 |
Nereididae_spp | Abundance of Nereididae spp. | number/meter^2 |
Nereocystis_luetkeana | Abundance of Nereocystis luetkeana | number/meter^2 |
Nucella_canaliculata | Abundance of Nucella canaliculata | number/meter^2 |
Octocorallia_spp | Abundance of Octocorallia spp. | number/meter^2 |
Odontohenricia_violacea | Abundance of Odontohenricia violacea | number/meter^2 |
Oedignathus_inermis | Abundance of Oedignathus inermis | number/meter^2 |
Oenopota_spp | Abundance of Oenopota spp. | number/meter^2 |
Ophiopholis_spp | Abundance of Ophiopholis spp. | number/meter^2 |
Ophiura_sarsii | Abundance of Ophiura sarsii | number/meter^2 |
Opuntiella_spp | Abundance of Opuntiella spp. | number/meter^2 |
Oregonia_gracilis | Abundance of Oregonia gracilis | number/meter^2 |
Orthasterias_koehleri | Abundance of Orthasterias koehleri | number/meter^2 |
Oxylebius_spp | Abundance of Oxylebius spp. | number/meter^2 |
Paguridae_spp | Abundance of Paguridae spp. | number/meter^2 |
Pagurus_beringanus | Abundance of Pagurus beringanus | number/meter^2 |
Pagurus_brandti | Abundance of Pagurus brandti | number/meter^2 |
Pagurus_dalli | Abundance of Pagurus dalli | number/meter^2 |
Pandalidae_spp | Abundance of Pandalidae spp. | number/meter^2 |
Peltodoris_nobilis | Abundance of Peltodoris nobilis | number/meter^2 |
Phascolosomatidae_spp | Abundance of Phascolosomatidae spp. | number/meter^2 |
Pholidae_spp | Abundance of Pholidae spp. | number/meter^2 |
Phyllolithodes_papillosus | Abundance of Phyllolithodes papillosus | number/meter^2 |
Platyhelminthes_spp | Abundance of Platyhelminthes spp. | number/meter^2 |
Pododesmus_macrochisma | Abundance of Pododesmus macrochisma | number/meter^2 |
Polychaeta_spp | Abundance of Polychaeta spp. | number/meter^2 |
Polynoidae_spp | Abundance of Polynoidae spp. | number/meter^2 |
Polyplacophora_spp | Abundance of Polyplacophora spp. | number/meter^2 |
Pteraster_militaris | Abundance of Pteraster militaris | number/meter^2 |
Pteraster_tesselatus | Abundance of Pteraster tesselatus | number/meter^2 |
Ptychodactis_aleutiensis | Abundance of Ptychodactis aleutiensis | number/meter^2 |
Pugettia_gracilis | Abundance of Pugettia gracilis | number/meter^2 |
Pugettia_producta | Abundance of Pugettia producta | number/meter^2 |
Pugettia_richii | Abundance of Pugettia richii | number/meter^2 |
Pugettia_spp | Abundance of Pugettia spp. | number/meter^2 |
Pycnogonida_spp | Abundance of Pycnogonida spp. | number/meter^2 |
Pycnopodia_helianthoides | Abundance of Pycnopodia helianthoides | number/meter^2 |
Rostanga_pulchra | Abundance of Rostanga pulchra | number/meter^2 |
Saccharina_dentigera | Abundance of Saccharina dentigera | number/meter^2 |
Saccharina_spp | Abundance of Saccharina spp. | number/meter^2 |
Schizymenia_pacifica | Abundance of Schizymenia pacifica | number/meter^2 |
Sebastes_spp | Abundance of Sebastes spp. | number/meter^2 |
Sipunculidea_spp | Abundance of Sipunculidea spp. | number/meter^2 |
Solariella_spp | Abundance of Solariella spp. | number/meter^2 |
Solaster_endeca | Abundance of Solaster endeca | number/meter^2 |
Solaster_stimpsoni | Abundance of Solaster stimpsoni | number/meter^2 |
Staurozoa_spp | Abundance of Staurozoa spp. | number/meter^2 |
Stephanasterias_albula | Abundance of Stephanasterias albula | number/meter^2 |
Strongylocentrotus_spp | Abundance of Strongylocentrotus spp. | number/meter^2 |
Styela_rustica | Abundance of Styela rustica | number/meter^2 |
Styela_stalked | Abundance of Styela stalked | number/meter^2 |
Tachyrhynchus_sp | Abundance of Tachyrhynchus sp. | number/meter^2 |
Tokidadendron_bullata | Abundance of Tokidadendron bullata | number/meter^2 |
Tonicella_lineata | Abundance of Tonicella lineata | number/meter^2 |
Tonicella_spp | Abundance of Tonicella spp. | number/meter^2 |
Trichotropis_spp | Abundance of Trichotropis spp. | number/meter^2 |
Triopha_catalinae | Abundance of Triopha catalinae | number/meter^2 |
Trochidae_spp | Abundance of Trochidae spp. | number/meter^2 |
Turbonilla_spp | Abundance of Turbonilla spp. | number/meter^2 |
Urticina_spp | Abundance of Urticina spp. | number/meter^2 |
Velutina_spp | Abundance of Velutina spp. | number/meter^2 |
Volutopsius_spp | Abundance of Volutopsius spp. | number/meter^2 |
Website | |
Platform | R/V Oceanus |
Start Date | 2016-06-17 |
End Date | 2016-07-02 |
Description | Project: Changes in Ecosystem Production and Benthic Biodiversity |
Website | |
Platform | R/V Oceanus |
Start Date | 2017-07-18 |
End Date | 2017-07-25 |
Description | Project: Changes in Ecosystem Production and Benthic Biodiversity |
NSF abstract:
In many ecosystems the presence of a single dominant species can modify the physical conditions of the environment and alter patterns of biodiversity, nutrient cycling, and primary production. Losses of these "ecosystem engineers" can have profound impacts to how ecosystems function. Coastal kelps provide excellent examples of organisms whose structure modifies the physical characteristics of their habitats (light, nutrients, water motion) and supports enhanced biodiversity. The kelp forests in the coastal waters of the Aleutian Archipelago have suffered large-scale declines over the past several decades. This project will examine how these losses impact patterns of ecosystem production and biodiversity using a combination of techniques ranging from in situ benthic chambers and shipboard incubations to remote sensing using satellite imagery. The results will provide an understanding of how such events may impact this and other ecosystems. This project will support graduate students and will introduce the public to the Aleutian ecosystems in a series of videos. The investigators will also work with a San Diego high school teacher to integrate project findings into classroom activities, and they expect to involve a teacher in their field program.
The investigators will ask two highly integrated questions: 1) How do the widespread losses of kelp forests impact benthic productivity across the Aleutian Archipelago? 2) How do the widespread losses of kelp forests impact benthic biodiversity and community structure across the archipelago? To address these, the investigators will estimate changes to productivity at ten islands where they have historic data on seaweed community composition and estimates of kelp canopy cover. They will use in situ benthic chambers placed in both kelp forests and urchin barrens to measure plot-scale patterns of net ecosystem productivity (NEP), and shipboard incubations to examine net primary productivity (NPP) for the dominant macroalgae. Data for individual species rates of NPP will be scaled by their biomass and combined with in situ plot-scale benthic chamber experiments of whole communities to estimate NEP at the islands visited. These estimates will be scaled up to calculate NEP across the entire archipelago by first extrapolating results from the study sites to entire islands, and then across the archipelago. They will also estimate broad-scale patterns in production by characterizing water column irradiances across the archipelago and modeling NPP using species-level relationships between irradiance and photosynthesis. Coupling these with estimates of water column irradiance and community respiration will allow modeling of NEP across this region. Benthic biodiversity will be assessed using diver surveys and shipboard benthic trawls. Following these activities, satellite remote sensing of the kelp canopies dating back to the 1980s and the investigators' own historical data on benthic macroalgal abundances at these and other islands will be used to estimate the temporal and spatial patterns of change across the archipelago.
For more information see:
Project blog: http://sdsukelp.weebly.com/blog
Project website: http://www.uaf.edu/cfos/research/projects/collaborative-research--/
Funding Source | Award |
---|---|
NSF Division of Ocean Sciences (NSF OCE) | |
NSF Division of Ocean Sciences (NSF OCE) |