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{
    "pk": 62892,
    "title": "Amazing Graze: Shifts in Jellyfish and Clam Distributions During Dry Years in the  San Francisco Estuary",
    "subtitle": null,
    "abstract": "Aquatic invasive species have drastically changed how the San Francisco Estuary functions. During the past 2 decades, the effects of invasive species in the estuary may have increased in response to frequent and severe drought conditions. The invasive overbite clam (\nPotamocorbula amurensis\n), and the Asian clam (\nCorbicula fluminea\n) have well documented consequences on the estuarine food web, but their responses to drought are not well understood. Another invasive species, the jellyfish \nMaeotias marginata\n, can further affect the food web, but these effects have not been studied. We investigated the population responses of these invasive species to dry years and their potential effects on the pelagic food web using data from the Interagency Ecological Program’s monitoring surveys. We found \nM\n. \nmarginata\n rapidly moves upstream with changing salinities during dry years, though it sees its highest abundance during high-outflow years in Suisun Bay and Suisun Marsh. Grazing rates of \nM\n. \nmarginata\n in the estuary have not been quantified but are potentially high during localized blooms. The two invasive clams overlap in distribution, but have opposite population responses to drought conditions, with increases in \nP\n. \namurensis\n densities and decreases in \nC\n. \nfluminea\n densities in dry years. With increasing \nP\n. \namurensis\n densities, the clams’ combined annual filtration rates increase during drier years in the confluence and Suisun Marsh. Like \nM\n. \nmarginata\n, \nP\n. \namurensis\n also shifts upstream during droughts, but because adults cannot move immediately with a change in salinity, the population center of distribution shifts upstream the year after a dry year as a result of juvenile recruitment. If multiple dry years occur in a row, and both \nP\n. \namurensis\n and \nM\n. \nmarginata\n move upstream together, their effects on the food web could be compounded, and phytoplankton and zooplankton biomass could steeply decline in the confluence, affecting higher trophic levels in the estuary.",
    "language": "en",
    "license": {
        "name": "Creative Commons Attribution 4.0",
        "short_name": "CC BY 4.0",
        "text": "Attribution — You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.\n\nNo additional restrictions — You may not apply legal terms or technological measures that legally restrict others from doing anything the license permits.",
        "url": "https://creativecommons.org/licenses/by/4.0"
    },
    "keywords": [
        {
            "word": "Potamocorbula amurensis, Corbicula fluminea, Maeotias marginata, jellyfish, clams, invasive species, benthic invertebrates, gelatinous zooplankton, grazing, drought"
        }
    ],
    "section": "Special Issue",
    "is_remote": true,
    "remote_url": "https://escholarship.org/uc/item/7vp9554z",
    "frozenauthors": [
        {
            "first_name": "Rosemary",
            "middle_name": "",
            "last_name": "Hartman",
            "name_suffix": "",
            "institution": "California Department of Water Resources\nWest Sacramento, CA 95691 USA",
            "department": ""
        },
        {
            "first_name": "Laura",
            "middle_name": "",
            "last_name": "Twardochleb",
            "name_suffix": "",
            "institution": "California Department of Water Resources\nWest Sacramento, CA 95691 USA\n\nand\n\nCalifornia State Water Resources Control Board\nSacramento, CA 95814 USA",
            "department": ""
        },
        {
            "first_name": "Christina",
            "middle_name": "E.",
            "last_name": "Burdi",
            "name_suffix": "",
            "institution": "California Department of Water Resources\nWest Sacramento, CA 95691 USA\n\nand\n\nCalifornia Department of Fish and Wildlife\nStockton, CA 95206 USA",
            "department": ""
        },
        {
            "first_name": "Elizabeth",
            "middle_name": "H.",
            "last_name": "Wells",
            "name_suffix": "",
            "institution": "California Department of Water Resources\nWest Sacramento, CA 95691 USA",
            "department": ""
        }
    ],
    "date_submitted": "2024-03-19T04:41:58Z",
    "date_accepted": "2024-03-19T04:41:58Z",
    "date_published": "2024-03-21T07:00:00Z",
    "render_galley": null,
    "galleys": [
        {
            "label": "",
            "type": "pdf",
            "path": "https://journalpub.escholarship.org/jmie_sfews/article/62892/galley/48578/download/"
        }
    ]
}