Estes James A.

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Estes
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James A.
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  • Dataset
    Benthic community cover and counts in Sitka Sound and Torch Bay, Alaska from 1988 to 2019
    (Biological and Chemical Oceanography Data Management Office (BCO-DMO). Contact: bco-dmo-data@whoi.edu, 2021-07-14) Kroeker, Kristy ; Raimondi, Peter T. ; Estes, James A.
    This dataset is part of a suite of studies conducted in Southeast Alaska to determine how kelp communities respond to variable environmental conditions arising from seasonal variability as well as changing ocean temperature and acidification conditions. The benthic communities in Sitka Sound and Torch Bay, Alaska were investigated at 19 sites from 1988 through 2019. Twenty quadrats were placed at random locations along a transect line, then benthic species were counted or the percent cover of the species was estimated in each quadrat. For a complete list of measurements, refer to the full dataset description in the supplemental file 'Dataset_description.pdf'. The most current version of this dataset is available at: https://www.bco-dmo.org/dataset/842632
  • Dataset
    GPS coordinates for survey sites in Sitka Sound and Torch Bay, Alaska from 2003 to 2019 (High latitude kelp dynamics project)
    (Biological and Chemical Oceanography Data Management Office (BCO-DMO). Contact: bco-dmo-data@whoi.edu, 2021-07-14) Kroeker, Kristy ; Estes, James A. ; Raimondi, Peter T.
    GPS coordinates for survey sites in Sitka Sound and Torch Bay, Alaska from 2003 to 2019 (High Latitude Kelp Dynamics project) For a complete list of measurements, refer to the full dataset description in the supplemental file 'Dataset_description.pdf'. The most current version of this dataset is available at: https://www.bco-dmo.org/dataset/852763
  • Preprint
    Animating the carbon cycle
    ( 2013-08) Schmitz, Oswald J. ; Raymond, Peter A. ; Estes, James A. ; Kurz, Werner A. ; Holtgrieve, Gordon W. ; Ritchie, Mark E. ; Schindler, Daniel E. ; Spivak, Amanda C. ; Wilson, Rod W. ; Bradford, Mark A. ; Christensen, Villy ; Deegan, Linda A. ; Smetacek, Victor ; Vanni, Michael J. ; Wilmers, Christopher C.
    Understanding the biogeochemical processes regulating carbon cycling is central to mitigating atmospheric CO2 emissions. The role of living organisms has been accounted for, but the focus has traditionally been on contributions of plants and microbes. We develop the case that fully “animating” the carbon cycle requires broader consideration of the functional role of animals in mediating biogeochemical processes and quantification of their effects on carbon storage and exchange among terrestrial and aquatic reservoirs and the atmosphere. To encourage more hypothesis-driven experimental research that quantifies animal effects we discuss the mechanisms by which animals may affect carbon exchanges and storage within and among ecosystems and the atmosphere. We illustrate how those mechanisms lead to multiplier effects whose magnitudes may rival those of more traditional carbon storage and exchange rate estimates currently used in the carbon budget. Many animal species are already directly managed. Thus improved quantitative understanding of their influence on carbon budgets may create opportunity for management and policy to identify and implement new options for mitigating CO2 release at regional scales.
  • Dataset
    Sea urchin frequency and diameters as surveyed in Sitka Sound and Torch Bay, Alaska
    (Biological and Chemical Oceanography Data Management Office (BCO-DMO). Contact: bco-dmo-data@whoi.edu, 2021-07-14) Kroeker, Kristy ; Raimondi, Peter T. ; Estes, James A.
    This dataset is part of a suite of studies conducted in Southeast Alaska to determine how benthic communities respond to variable environmental conditions. In an effort to determine how temperature and carbonate chemistry combine to affect primary consumer bioenergetics and research the indirect effects of ocean acidification and warming on primary consumers, the sea urchin population was investigated. The frequency of occurrence and test diameter was recorded for sea urchins at Sitka Sound and Torch Bay, Alaska from 1988 to 2019. For a complete list of measurements, refer to the full dataset description in the supplemental file 'Dataset_description.pdf'. The most current version of this dataset is available at: https://www.bco-dmo.org/dataset/842621
  • Dataset
    Estimates of island-wide sea otter population density as surveyed with boats circumnavigating nine focal islands within the central and western Aleutian Islands (Alaska) from 1991-2015.
    (Biological and Chemical Oceanography Data Management Office (BCO-DMO). Contact: bco-dmo-data@whoi.edu, 2021-02-23) Estes, James A. ; Steneck, Robert S. ; Rasher, Douglas B.
    Island-wide sea otter population densities were quantified at each of six focal islands (as well as three other islands) over the last three decades (1991-2015). Surveys were conducted opportunistically as part of a long-term monitoring program coordinated and overseen by the U.S. Fish and Wildlife Service. For a complete list of measurements, refer to the full dataset description in the supplemental file 'Dataset_description.pdf'. The most current version of this dataset is available at: https://www.bco-dmo.org/dataset/838077