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 biomass measured as kilograms 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 biomass columns from 16 decimal places to 2 or none for 0.
- corrected spelling of 7 taxa to agree with World Register of Marine Species names
File |
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biomass.csv (Comma Separated Values (.csv), 43.64 KB) MD5:a4e04d83826380971812d5aa30f0055d Primary data file for dataset ID 728084 |
Parameter | Description | Units |
Site | sampling site identifer | unitless |
Island | island name | unitless |
Habitat | type of habitat: kelp; barren; transition | unitless |
Region | East-west sampling region | unitless |
Year | sampling year | unitless |
Lat | latitude; north is positive | decimal degrees |
Long | longtude; east is positive | decimal degrees |
Depth_avg_ft | average sampling depth | feet |
Depth_stdev | sampling depth standard deviation | feet |
Acanthodoris_spp | Biomass of Acanthodoris spp. | kilograms/meter^2 |
Acarnus_erithacus | Biomass of Acarnus erithacus | kilograms/meter^2 |
Acmaea_mitra | Biomass of Acmaea mitra | kilograms/meter^2 |
Acropora_spp | Biomass of Acropora spp. | kilograms/meter^2 |
Actiniaria_spp | Biomass of Actiniaria spp. | kilograms/meter^2 |
Agarum_clathratum | Biomass of Agarum clathratum | kilograms/meter^2 |
Agarum_clathrus | Biomass of Agarum clathrus | kilograms/meter^2 |
Alaria_marginata | Biomass of Alaria marginata | kilograms/meter^2 |
Alcyonacea_spp | Biomass of Alcyonacea spp. | kilograms/meter^2 |
Alcyonidium_gelatinosum | Biomass of Alcyonidium gelatinosum | kilograms/meter^2 |
Alcyonidium_spp | Biomass of Alcyonidium spp. | kilograms/meter^2 |
Alcyonium_spp | Biomass of Alcyonium spp. | kilograms/meter^2 |
Aleutiaster_schefferi | Biomass of Aleutiaster schefferi | kilograms/meter^2 |
Amphipoda_spp | Biomass of Amphipoda spp. | kilograms/meter^2 |
Annelida_spp | Biomass of Annelida spp. | kilograms/meter^2 |
Anthozoa_spp | Biomass of Anthozoa spp. | kilograms/meter^2 |
Arctomelon_tamikoae | Biomass of Arctomelon tamikoae | kilograms/meter^2 |
Ariadnaria_insignis | Biomass of Ariadnaria insignis | kilograms/meter^2 |
Ascidiacea_spp | Biomass of Ascidiacea spp. | kilograms/meter^2 |
Axinella_spp | Biomass of Axinella spp. | kilograms/meter^2 |
Bacillariophyceae_spp | Biomass of Bacillariophyceae spp. | kilograms/meter^2 |
Balanus_spp | Biomass of Balanus spp. | kilograms/meter^2 |
Beringius_crebricostatus | Biomass of Beringius crebricostatus | kilograms/meter^2 |
Beringius_spp | Biomass of Beringius spp. | kilograms/meter^2 |
Boreotrophon_spp | Biomass of Boreotrophon spp. | kilograms/meter^2 |
Bossiella_spp | Biomass of Bossiella spp. | kilograms/meter^2 |
Brachiopoda_spp | Biomass of Brachiopoda spp. | kilograms/meter^2 |
Bryozoa_spp | Biomass of Bryozoa spp. | kilograms/meter^2 |
Buccinidae_spp | Biomass of Buccinidae spp. | kilograms/meter^2 |
Callophyllis_spp_1 | Biomass of Callophyllis spp 1 | kilograms/meter^2 |
Callophyllis_spp_2 | Biomass of Callophyllis spp 2 | kilograms/meter^2 |
Cancer_spp | Biomass of Cancer spp. | kilograms/meter^2 |
Caprellidae_spp | Biomass of Caprellidae spp. | kilograms/meter^2 |
Caryophyllia_Caryophyllia_alaskensis | Biomass of Caryophyllia Caryophyllia alaskensis | kilograms/meter^2 |
Ceramaster_arcticus | Biomass of Ceramaster arcticus | kilograms/meter^2 |
Chlamys_rubida | Biomass of Chlamys rubida | kilograms/meter^2 |
Chondracanthus_exasperatus | Biomass of Chondracanthus exasperatus | kilograms/meter^2 |
Cirripedia_spp | Biomass of Cirripedia spp. | kilograms/meter^2 |
Cirrulicarpus_ruprechtianus | Biomass of Cirrulicarpus ruprechtianus | kilograms/meter^2 |
Clathromorphum_spp | Biomass of Clathromorphum spp. | kilograms/meter^2 |
Codium_setchellii | Biomass of Codium setchellii | kilograms/meter^2 |
Colus_spp | Biomass of Colus spp. | kilograms/meter^2 |
Constantinea_rosa_marina | Biomass of Constantinea rosa marina | kilograms/meter^2 |
Corallina_spp | Biomass of Corallina spp. | kilograms/meter^2 |
Crangonidae_spp | Biomass of Crangonidae spp. | kilograms/meter^2 |
Crepidula_spp | Biomass of Crepidula spp. | kilograms/meter^2 |
Crossaster_papposus | Biomass of Crossaster papposus | kilograms/meter^2 |
Cryptochiton_stelleri | Biomass of Cryptochiton stelleri | kilograms/meter^2 |
Cryptolithodes_sitchensis | Biomass of Cryptolithodes sitchensis | kilograms/meter^2 |
Cryptolithodes_typicus | Biomass of Cryptolithodes typicus | kilograms/meter^2 |
Cryptonatica_spp | Biomass of Cryptonatica spp. | kilograms/meter^2 |
Cucumaria_spp | Biomass of Cucumaria spp. | kilograms/meter^2 |
Cumathamnion_decipiens | Biomass of Cumathamnion decipiens | kilograms/meter^2 |
Cymathaere_triplicata | Biomass of Cymathaere triplicata | kilograms/meter^2 |
Demospongiae_spp | Biomass of Demospongiae spp. | kilograms/meter^2 |
Dendrophylliidae_spp | Biomass of Dendrophylliidae spp. | kilograms/meter^2 |
Derbesia_marina | Biomass of Derbesia marina | kilograms/meter^2 |
Dermaturus_mandtii | Biomass of Dermaturus mandtii | kilograms/meter^2 |
Desmarestia_aculeata | Biomass of Desmarestia aculeata | kilograms/meter^2 |
Desmarestia_ligulata | Biomass of Desmarestia ligulata | kilograms/meter^2 |
Desmarestia_viridis | Biomass of Desmarestia viridis | kilograms/meter^2 |
Diaulula_sandiegensis | Biomass of Diaulula sandiegensis | kilograms/meter^2 |
Didemnidae_spp | Biomass of Didemnidae spp. | kilograms/meter^2 |
Diodora_aspera | Biomass of Diodora aspera | kilograms/meter^2 |
Distaplia_spp | Biomass of Distaplia spp. | kilograms/meter^2 |
Doridoidea_spp | Biomass of Doridoidea spp. | kilograms/meter^2 |
Elassochirus_gilli | Biomass of Elassochirus gilli | kilograms/meter^2 |
Errantia_spp | Biomass of Errantia spp. | kilograms/meter^2 |
Eualaria_fistulosa | Biomass of Eualaria fistulosa | kilograms/meter^2 |
Eudistylia_vancouveri | Biomass of Eudistylia vancouveri | kilograms/meter^2 |
Eunoe_spp | Biomass of Eunoe spp. | kilograms/meter^2 |
Euphrosine_multibranchiata | Biomass of Euphrosine multibranchiata | kilograms/meter^2 |
Euthora_cristata | Biomass of Euthora cristata | kilograms/meter^2 |
Evasterias_retifera | Biomass of Evasterias retifera | kilograms/meter^2 |
Evasterias_spp | Biomass of Evasterias spp. | kilograms/meter^2 |
Flabellina_trophina | Biomass of Flabellina trophina | kilograms/meter^2 |
Florideophyceae_spp | Biomass of Florideophyceae spp. | kilograms/meter^2 |
Flustrellidra_corniculata | Biomass of Flustrellidra corniculata | kilograms/meter^2 |
Fusitriton_oregonensis | Biomass of Fusitriton oregonensis | kilograms/meter^2 |
Gastropoda_spp | Biomass of Gastropoda spp. | kilograms/meter^2 |
Gersemia_spp | Biomass of Gersemia spp. | kilograms/meter^2 |
Glebocarcinus_oregonensis | Biomass of Glebocarcinus oregonensis | kilograms/meter^2 |
Halichondria_spp | Biomass of Halichondria spp. | kilograms/meter^2 |
Haliclona_spp | Biomass of Haliclona spp. | kilograms/meter^2 |
Halocynthia_aurantium | Biomass of Halocynthia aurantium | kilograms/meter^2 |
Henricia_elachys | Biomass of Henricia elachys | kilograms/meter^2 |
Henricia_gemma | Biomass of Henricia gemma | kilograms/meter^2 |
Henricia_insignis | Biomass of Henricia insignis | kilograms/meter^2 |
Henricia_iodinea | Biomass of Henricia iodinea | kilograms/meter^2 |
Henricia_lineata | Biomass of Henricia lineata | kilograms/meter^2 |
Henricia_oculata | Biomass of Henricia oculata | kilograms/meter^2 |
Henricia_rhytisma | Biomass of Henricia rhytisma | kilograms/meter^2 |
Henricia_sanguinolenta | Biomass of Henricia sanguinolenta | kilograms/meter^2 |
Henricia_spp | Biomass of Henricia spp. | kilograms/meter^2 |
Henricia_tumida | Biomass of Henricia tumida | kilograms/meter^2 |
Henricia_uluudax | Biomass of Henricia uluudax | kilograms/meter^2 |
Henricia_vermilion | Biomass of Henricia vermilion | kilograms/meter^2 |
Heptacarpus_brevirostris | Biomass of Heptacarpus brevirostris | kilograms/meter^2 |
Hexagrammos_spp | Biomass of Hexagrammos spp. | kilograms/meter^2 |
Hiatella_arctica | Biomass of Hiatella arctica | kilograms/meter^2 |
Hippasteria_phrygiana_aleutica | Biomass of Hippasteria phrygiana aleutica | kilograms/meter^2 |
Hommersandia_maximicarpa | Biomass of Hommersandia maximicarpa | kilograms/meter^2 |
Hydrozoa_spp | Biomass of Hydrozoa spp. | kilograms/meter^2 |
Hymenena_ruthenica | Biomass of Hymenena ruthenica | kilograms/meter^2 |
Irtugovia_pacifica | Biomass of Irtugovia pacifica | kilograms/meter^2 |
Ischnochiton_spp | Biomass of Ischnochiton spp. | kilograms/meter^2 |
Isopoda_spp | Biomass of Isopoda spp. | kilograms/meter^2 |
Kallymeniopsis_spp | Biomass of Kallymeniopsis spp. | kilograms/meter^2 |
Katharina_tunicata | Biomass of Katharina tunicata | kilograms/meter^2 |
Lacuna_spp | Biomass of Lacuna spp. | kilograms/meter^2 |
Laingia_aleutica | Biomass of Laingia aleutica | kilograms/meter^2 |
Laminaria_longipes | Biomass of Laminaria longipes | kilograms/meter^2 |
Laminaria_setchellii | Biomass of Laminaria setchellii | kilograms/meter^2 |
Laminaria_spp | Biomass of Laminaria spp. | kilograms/meter^2 |
Laminaria_yezoensis | Biomass of Laminaria yezoensis | kilograms/meter^2 |
Leptasterias_alaskensis | Biomass of Leptasterias alaskensis | kilograms/meter^2 |
Leptasterias_aleutica | Biomass of Leptasterias aleutica | kilograms/meter^2 |
Leptasterias_arctica | Biomass of Leptasterias arctica | kilograms/meter^2 |
Leptasterias_asteira | Biomass of Leptasterias asteira | kilograms/meter^2 |
Leptasterias_camtschatica | Biomass of Leptasterias camtschatica | kilograms/meter^2 |
Leptasterias_derbeki | Biomass of Leptasterias derbeki | kilograms/meter^2 |
Leptasterias_hexactis | Biomass of Leptasterias hexactis | kilograms/meter^2 |
Leptasterias_hylodes | Biomass of Leptasterias hylodes | kilograms/meter^2 |
Leptasterias_leptodoma | Biomass of Leptasterias leptodoma | kilograms/meter^2 |
Leptasterias_ochotensis | Biomass of Leptasterias ochotensis | kilograms/meter^2 |
Leptasterias_spp | Biomass of Leptasterias spp. | kilograms/meter^2 |
Leptasterias_stolacantha | Biomass of Leptasterias stolacantha | kilograms/meter^2 |
Leptasterias_tatei | Biomass of Leptasterias tatei | kilograms/meter^2 |
Lethasterias_nanimensis | Biomass of Lethasterias nanimensis | kilograms/meter^2 |
Leucandra_heathi | Biomass of Leucandra heathi | kilograms/meter^2 |
Leucilla_nuttingi | Biomass of Leucilla nuttingi | kilograms/meter^2 |
Leukoma_staminea | Biomass of Leukoma staminea | kilograms/meter^2 |
Limneria_spp | Biomass of Limneria spp. | kilograms/meter^2 |
Lithodidae_spp | Biomass of Lithodidae spp. | kilograms/meter^2 |
Littorina_spp | Biomass of Littorina spp. | kilograms/meter^2 |
Lottia_instabilis | Biomass of Lottia instabilis | kilograms/meter^2 |
Lottia_pelta | Biomass of Lottia pelta | kilograms/meter^2 |
Lottia_persona | Biomass of Lottia persona | kilograms/meter^2 |
Lottia_scutum | Biomass of Lottia scutum | kilograms/meter^2 |
Margarites_spp | Biomass of Margarites spp. | kilograms/meter^2 |
Mastocarpus_papillatus | Biomass of Mastocarpus papillatus | kilograms/meter^2 |
Mazzaella_spp | Biomass of Mazzaella spp. | kilograms/meter^2 |
Membranoptera_spinulosa | Biomass of Membranoptera spinulosa | kilograms/meter^2 |
Metridium_dianthus | Biomass of Metridium dianthus | kilograms/meter^2 |
Metridium_farcimen | Biomass of Metridium farcimen | kilograms/meter^2 |
Metridium_spp | Biomass of Metridium spp. | kilograms/meter^2 |
Microporella_borealis | Biomass of Microporella borealis | kilograms/meter^2 |
Microporina_spp | Biomass of Microporina spp. | kilograms/meter^2 |
Mikamiella_ruprechtiana | Biomass of Mikamiella ruprechtiana | kilograms/meter^2 |
Modiolus_modiolus | Biomass of Modiolus modiolus | kilograms/meter^2 |
Mopalia_ciliata | Biomass of Mopalia ciliata | kilograms/meter^2 |
Musculus_discors | Biomass of Musculus discors | kilograms/meter^2 |
Musculus_niger | Biomass of Musculus niger | kilograms/meter^2 |
Musculus_spp | Biomass of Musculus spp. | kilograms/meter^2 |
Myxilla_spp | Biomass of Myxilla spp. | kilograms/meter^2 |
Nematoda_spp | Biomass of Nematoda spp. | kilograms/meter^2 |
Nemertea_spp | Biomass of Nemertea spp. | kilograms/meter^2 |
Neoptilota_asplenioides | Biomass of Neoptilota asplenioides | kilograms/meter^2 |
Neptunea_spp | Biomass of Neptunea spp. | kilograms/meter^2 |
Nereididae_spp | Biomass of Nereididae spp. | kilograms/meter^2 |
Nienburgia_spp | Biomass of Nienburgia spp. | kilograms/meter^2 |
Nucella_canaliculata | Biomass of Nucella canaliculata | kilograms/meter^2 |
Octocorallia_spp | Biomass of Octocorallia spp. | kilograms/meter^2 |
Odonthalia_spp | Biomass of Odonthalia spp. | kilograms/meter^2 |
Odontohenricia_violacea | Biomass of Odontohenricia violacea | kilograms/meter^2 |
Oedignathus_inermis | Biomass of Oedignathus inermis | kilograms/meter^2 |
Oenopota_spp | Biomass of Oenopota spp. | kilograms/meter^2 |
Ophiopholis_spp | Biomass of Ophiopholis spp. | kilograms/meter^2 |
Ophiura_sarsii | Biomass of Ophiura sarsii | kilograms/meter^2 |
Opuntiella_spp | Biomass of Opuntiella spp. | kilograms/meter^2 |
Oregonia_gracilis | Biomass of Oregonia gracilis | kilograms/meter^2 |
Orthasterias_koehleri | Biomass of Orthasterias koehleri | kilograms/meter^2 |
Paguridae_spp | Biomass of Paguridae spp. | kilograms/meter^2 |
Pagurus_beringanus | Biomass of Pagurus beringanus | kilograms/meter^2 |
Pagurus_brandti | Biomass of Pagurus brandti | kilograms/meter^2 |
Pagurus_dalli | Biomass of Pagurus dalli | kilograms/meter^2 |
Palmaria_hecatensis | Biomass of Palmaria hecatensis | kilograms/meter^2 |
Palmaria_spp | Biomass of Palmaria spp. | kilograms/meter^2 |
Palmeria_spp | Biomass of Palmeria spp. | kilograms/meter^2 |
Pandalidae_spp | Biomass of Pandalidae spp. | kilograms/meter^2 |
Pantoneura_juergensii | Biomass of Pantoneura juergensii | kilograms/meter^2 |
Peltodoris_nobilis | Biomass of Peltodoris nobilis | kilograms/meter^2 |
Phascolosomatidae_spp | Biomass of Phascolosomatidae spp. | kilograms/meter^2 |
Phyllolithodes_papillosus | Biomass of Phyllolithodes papillosus | kilograms/meter^2 |
Plakina_tanaga | Biomass of Plakina tanaga | kilograms/meter^2 |
Platyhelminthes_spp | Biomass of Platyhelminthes spp. | kilograms/meter^2 |
Pleuroblepharidella_spp | Biomass of Pleuroblepharidella spp. | kilograms/meter^2 |
Pododesmus_macrochisma | Biomass of Pododesmus macrochisma | kilograms/meter^2 |
Polychaeta_spp | Biomass of Polychaeta spp. | kilograms/meter^2 |
Polymastia_spp | Biomass of Polymastia spp. | kilograms/meter^2 |
Polyneura_latissima | Biomass of Polyneura latissima | kilograms/meter^2 |
Polynoidae_spp | Biomass of Polynoidae spp. | kilograms/meter^2 |
Polyplacophora_spp | Biomass of Polyplacophora spp. | kilograms/meter^2 |
Polysiphonia_pacifica | Biomass of Polysiphonia pacifica | kilograms/meter^2 |
Porifera_spp | Biomass of Porifera spp. | kilograms/meter^2 |
Porphyra_spp | Biomass of Porphyra spp. | kilograms/meter^2 |
Pteraster_militaris | Biomass of Pteraster militaris | kilograms/meter^2 |
Pteraster_tesselatus | Biomass of Pteraster tesselatus | kilograms/meter^2 |
Pterosiphonia_hamata | Biomass of Pterosiphonia hamata | kilograms/meter^2 |
Ptilota_serrata | Biomass of Ptilota serrata | kilograms/meter^2 |
Pugettia_spp | Biomass of Pugettia spp. | kilograms/meter^2 |
Pycnogonida_spp | Biomass of Pycnogonida spp. | kilograms/meter^2 |
Pycnopodia_helianthoides | Biomass of Pycnopodia helianthoides | kilograms/meter^2 |
Pyropia_spp | Biomass of Pyropia spp. | kilograms/meter^2 |
Rostanga_pulchra | Biomass of Rostanga pulchra | kilograms/meter^2 |
Sabellidae_spp | Biomass of Sabellidae spp. | kilograms/meter^2 |
Saccharina_dentigera | Biomass of Saccharina dentigera | kilograms/meter^2 |
Saccharina_spp | Biomass of Saccharina spp. | kilograms/meter^2 |
Scagelia_spp | Biomass of Scagelia spp. | kilograms/meter^2 |
Schizymenia_pacifica | Biomass of Schizymenia pacifica | kilograms/meter^2 |
Serpulidae_spp | Biomass of Serpulidae spp. | kilograms/meter^2 |
Sipunculidea_spp | Biomass of Sipunculidea spp. | kilograms/meter^2 |
Solariella_spp | Biomass of Solariella spp. | kilograms/meter^2 |
Solaster_endeca | Biomass of Solaster endeca | kilograms/meter^2 |
Solaster_stimpsoni | Biomass of Solaster stimpsoni | kilograms/meter^2 |
Sparlingia_pertusa | Biomass of Sparlingia pertusa | kilograms/meter^2 |
Staurozoa_spp | Biomass of Staurozoa spp. | kilograms/meter^2 |
Stephanasterias_albula | Biomass of Stephanasterias albula | kilograms/meter^2 |
Strongylocentrotus_spp | Biomass of Strongylocentrotus spp. | kilograms/meter^2 |
Styela_rustica | Biomass of Styela rustica | kilograms/meter^2 |
Styela_stalked | Biomass of Styela stalked | kilograms/meter^2 |
Sunamphitoe_spp | Biomass of Sunamphitoe spp. | kilograms/meter^2 |
Sycon_compactum | Biomass of Sycon compactum | kilograms/meter^2 |
Tachyrhynchus_sp | Biomass of Tachyrhynchus sp. | kilograms/meter^2 |
Tokidadendron_bullata | Biomass of Tokidadendron bullata | kilograms/meter^2 |
Tonicella_lineata | Biomass of Tonicella lineata | kilograms/meter^2 |
Tonicella_spp | Biomass of Tonicella spp. | kilograms/meter^2 |
Trichotropis_spp | Biomass of Trichotropis spp. | kilograms/meter^2 |
Triopha_catalinae | Biomass of Triopha catalinae | kilograms/meter^2 |
Trochidae_spp | Biomass of Trochidae spp. | kilograms/meter^2 |
Turbonilla_spp | Biomass of Turbonilla spp. | kilograms/meter^2 |
Turnerella_spp | Biomass of Turnerella spp. | kilograms/meter^2 |
Ulva_lactuca | Biomass of Ulva lactuca | kilograms/meter^2 |
Urticina_spp | Biomass of Urticina spp. | kilograms/meter^2 |
Velutina_spp | Biomass of Velutina spp. | kilograms/meter^2 |
Volutopsius_spp | Biomass of Volutopsius spp. | kilograms/meter^2 |
Vulcanella_spp | Biomass of Vulcanella spp. | kilograms/meter^2 |
Walking_anemone | Biomass of Walking anemone | kilograms/meter^2 |
Zinovaea_acanthocarpa | Biomass of Zinovaea acanthocarpa | kilograms/meter^2 |
Dataset-specific Instrument Name | hanging spring scales |
Generic Instrument Name | scale or balance |
Dataset-specific Description | Used to weigh specimens for biomass determination. |
Generic Instrument Description | Devices that determine the mass or weight of a sample. |
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 |
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NSF Division of Ocean Sciences (NSF OCE) | |
NSF Division of Ocean Sciences (NSF OCE) |