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| Abstract |
- The Bering Sea ecosystem has experienced significant climatic and biological shifts
over the past 3 decades, including temporal and spatial fluctuations of jellyfish biomass. Jellyfish
are important predators and competitors of fish; thus, it is critical to understand the effects of environmental
factors on their population dynamics. We explored the effects of ocean bottom temperatures
and circulation on jellyfish populations using a non-parametric, nonlinear multiple time
series analysis of a 23 yr dataset. The study area was divided into 3 subregions that reflected distinct
jellyfish catches and distributions. Aggregations and the influence of temperature and circulation
on jellyfish biomass were found to differ in each of the 3 subregions. The northern region
biomass was affected by central biomass, mediated by the strength of advection from the central
region. In both the northern and central regions, current-year biomass was associated with lag-1
biomass, but was mediated by local bottom temperatures (colder temperatures strengthened the
relationship with lag-1 biomass). However, in the central region, this relationship held only for the
period after 1997. Prior to 1997, advection from the southern region drove central region biomass,
suggesting that the primary source of jellyfish biomass to the central eastern Bering Sea shelf
changed, coming from the southern shelf before 1997 and from the central shelf after 1997. The
southern jellyfish biomass was affected by only the lag-1 southern jellyfish biomass. Transport
from the south may have seeded the central region in the early 1990s, but once established, jellyfish
polyp populations near islands in the central region may have supplied the area with medusae
in the late 1990s.
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| Citation |
- Decker, M. B., Liu, H., Ciannelli, L., Ladd, C., Cheng, W., & Chan, K. S. (2013). Linking changes in eastern Bering Sea jellyfish populations to environmental factors via nonlinear time series models. Marine Ecology Progress Series, 494, 179-189. doi:10.3354/meps10545
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| Funding Statement (additional comments about funding) |
- We acknowledge
the following funding sources: National Science Foundation
Collaboration in Mathematical Geosciences Grants
(0620789 and 0934617 to K.S.C., 0621153 and 0934961 to
L.C., 0620493 and 0934727 to M.B.D.) and North Pacific
Research Board (NPRB) project number 606. This is contribution
3721 from NOAA’s Pacific Marine Environmental
Laboratory, 2184 from the Joint Institute for the Study of
the Atmosphere and Oceans, University of Washington,
and EcoFOCI-0768 from NOAA’s Fisheries-Oceanography
Coordinated Investigations (EcoFOCI).
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| Additional Information |
- description.provenance : Approved for entry into archive by Erin Clark(erin.clark@oregonstate.edu) on 2014-05-28T19:09:54Z (GMT) No. of bitstreams: 2
CiannelliLorenzoCEOASLinkingChangesEastern.pdf: 692178 bytes, checksum: d9e9a94ca9c4c63b79c46872dcb4d38a (MD5)
CiannelliLorenzoCEOASLinkingChangesEastern_SupplementaryMaterial.pdf: 1715443 bytes, checksum: fdaf55b45037d212881c60494207a3b3 (MD5)
- description.provenance : Submitted by Erin Clark (erin.clark@oregonstate.edu) on 2014-05-28T19:09:33Z
No. of bitstreams: 2
CiannelliLorenzoCEOASLinkingChangesEastern.pdf: 692178 bytes, checksum: d9e9a94ca9c4c63b79c46872dcb4d38a (MD5)
CiannelliLorenzoCEOASLinkingChangesEastern_SupplementaryMaterial.pdf: 1715443 bytes, checksum: fdaf55b45037d212881c60494207a3b3 (MD5)
- description.provenance : Made available in DSpace on 2014-05-28T19:09:54Z (GMT). No. of bitstreams: 2
CiannelliLorenzoCEOASLinkingChangesEastern.pdf: 692178 bytes, checksum: d9e9a94ca9c4c63b79c46872dcb4d38a (MD5)
CiannelliLorenzoCEOASLinkingChangesEastern_SupplementaryMaterial.pdf: 1715443 bytes, checksum: fdaf55b45037d212881c60494207a3b3 (MD5)
Previous issue date: 2013-12-04
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