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Dodson S, Oestreich WK, Savoca MS, Hazen EL, Bograd SJ, Ryan JP, Fiechter J, Abrahms B. Long-distance communication can enable collective migration in a dynamic seascape. Sci Rep 2024; 14:14857. [PMID: 38937635 PMCID: PMC11211507 DOI: 10.1038/s41598-024-65827-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/18/2024] [Accepted: 06/24/2024] [Indexed: 06/29/2024] Open
Abstract
Social information is predicted to enhance the quality of animals' migratory decisions in dynamic ecosystems, but the relative benefits of social information in the long-range movements of marine megafauna are unknown. In particular, whether and how migrants use nonlocal information gained through social communication at the large spatial scale of oceanic ecosystems remains unclear. Here we test hypotheses about the cues underlying timing of blue whales' breeding migration in the Northeast Pacific via individual-based models parameterized by empirical behavioral data. Comparing emergent patterns from individual-based models to individual and population-level empirical metrics of migration timing, we find that individual whales likely rely on both personal and social sources of information about forage availability in deciding when to depart from their vast and dynamic foraging habitat and initiate breeding migration. Empirical patterns of migratory phenology can only be reproduced by models in which individuals use long-distance social information about conspecifics' behavioral state, which is known to be encoded in the patterning of their widely propagating songs. Further, social communication improves pre-migration seasonal foraging performance by over 60% relative to asocial movement mechanisms. Our results suggest that long-range communication enhances the perceptual ranges of migrating whales beyond that of any individual, resulting in increased foraging performance and more collective migration timing. These findings indicate the value of nonlocal social information in an oceanic migrant and suggest the importance of long-distance acoustic communication in the collective migration of wide-ranging marine megafauna.
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Affiliation(s)
- Stephanie Dodson
- Department of Mathematics, Colby College, Waterville, ME, 04901, USA.
| | | | - Matthew S Savoca
- Hopkins Marine Station, Department of Biology, Stanford University, Pacific Grove, CA, 93950, USA
| | - Elliott L Hazen
- Environmental Research Division, Southwest Fisheries Science Center, National Oceanic and Atmospheric Administration, Monterey, CA, 93940, USA
- Institute of Marine Sciences, University of California, Santa Cruz, Santa Cruz, CA, 95064, USA
| | - Steven J Bograd
- Environmental Research Division, Southwest Fisheries Science Center, National Oceanic and Atmospheric Administration, Monterey, CA, 93940, USA
| | - John P Ryan
- Monterey Bay Aquarium Research Institute, Moss Landing, CA, 95039, USA
| | - Jerome Fiechter
- Department of Ocean Sciences, University of California Santa Cruz, Santa Cruz, CA, 95064, USA
| | - Briana Abrahms
- Department of Biology, Center for Ecosystem Sentinels, University of Washington, Seattle, WA, 98195, USA
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Benoit-Bird KJ. Resource Patchiness as a Resolution to the Food Paradox in the Sea. Am Nat 2024; 203:1-13. [PMID: 38207143 DOI: 10.1086/727473] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2024]
Abstract
AbstractAverage concentrations of biota in the ocean are low, presenting a critical problem for ocean consumers. High-resolution sampling, however, demonstrates that the ocean is peppered with narrow hot spots of organism activity. To determine whether these resource aggregations could provide a significant solution to the ocean's food paradox, a conceptual graphical model was developed that facilitates comparisons of the role of patchiness in predator-prey interactions across taxa, size scales, and ecosystems. The model predicts that predators are more reliant on aggregated resources for foraging success when the average concentrations of resources is low, the size discrepancy between predator and prey is great, the predator has a high metabolic rate, and/or the predator's foraging time is limited. Size structure differences between marine and terrestrial food webs and a vast disparity in the overall mean density of their resources lead to the conclusion that high-density aggregations of prey are much more important to the survival of oceanic predators than their terrestrial counterparts, shaping the foraging decisions that are available to an individual and setting the stage on which evolutionary pressures can act. Patches of plenty may be rare, but they play an outsized role in behavioral, ecological, and evolutionary processes, particularly in the sea.
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Hayford HA, Gilman SE, Carrington E. Tidal cues reduce thermal risk of climate change in a foraging marine snail. CLIMATE CHANGE ECOLOGY 2021. [DOI: 10.1016/j.ecochg.2021.100003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
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Sauser C, Delord K, Barbraud C. Demographic sensitivity to environmental forcings: a multi‐trait, multi‐colony approach. OIKOS 2021. [DOI: 10.1111/oik.07441] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Affiliation(s)
- Christophe Sauser
- Centre d'Etudes Biologiques de Chizé UMR 7372, CNRS Villiers en Bois France
| | - Karine Delord
- Centre d'Etudes Biologiques de Chizé UMR 7372, CNRS Villiers en Bois France
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Anderson TR, Gentleman WC. Remembering John Steele and his models for understanding the structure and function of marine ecosystems. JOURNAL OF PLANKTON RESEARCH 2019; 41:609-620. [PMID: 31768080 PMCID: PMC6862939 DOI: 10.1093/plankt/fbz042] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/31/2019] [Revised: 06/29/2019] [Accepted: 07/03/2019] [Indexed: 06/10/2023]
Abstract
John Steele (1926-2013) is remembered for his ecosystem modelling studies on the role of biological interactions and environment on the structure and function of marine ecosystems, including consequences for fish production and fisheries management. Here, we provide a scientific tribute to Steele focusing on, by means of example, his modelling of plankton predation [Steele and Henderson (1992) The role of predation in plankton models. J. Plankton Res., 14, 157-172] that showed that differences in ecosystem dynamics between the subarctic Pacific and North Atlantic oceans can be explained solely on the basis of zooplankton mortality. The study highlights Steele's artistry in simplifying the system to a tractable minimal model while paying great attention to the precise functional forms used to parameterize mortality, grazing and other biological processes. The success of this and other works by Steele was in large part due to his effective communication with the rest of the scientific community (especially non-modellers) resulting from his enthusiasm, use of an experiment-like (hypothesis driven) approach to applying his models and by describing simplifications and assumptions in scrupulous detail. We also intend our contribution to remember Steele as the consummate gentleman, notably his humble, behind-the-scenes attitude, his humour and his dedication to enhancing the careers of others.
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Affiliation(s)
- Thomas R Anderson
- NATIONAL OCEANOGRAPHY CENTRE, EUROPEAN WAY, SOUTHAMPTON SO14 3ZH, UK
| | - Wendy C Gentleman
- Department of Engineering Mathematics, Dalhousie University, 5217 Morris St, PO Box 15000, Halifax, NS B3J 1B6 Canada
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Dabiri Z, Blaschke T. Scale matters: a survey of the concepts of scale used in spatial disciplines. EUROPEAN JOURNAL OF REMOTE SENSING 2019; 52:419-434. [PMID: 31275899 PMCID: PMC6582463 DOI: 10.1080/22797254.2019.1626291] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 10/26/2018] [Revised: 05/12/2019] [Accepted: 05/29/2019] [Indexed: 06/09/2023]
Abstract
Scale is a critical factor when studying patterns and the processes that cause them. A variety of approaches have been used to define the concept of scale but confusion and ambiguities remain regarding scale types and their definitions. The objectives of this study were therefore (1) to review existing types and definitions of scale, and (2) to systematically investigate the ambiguities in scale definitions and to determine the applicability of the various scale types and definitions. Through a comprehensive literature review, we identified seven types of scales and designed a survey for the seven definitions of scale and interviewed 150 scientists. The results show that the more cartography related types of scale are relatively well known while the more abstract dimensions are less known and are most ambiguous. Based on graphical examples, participants were asked which spatial scales are most relevant for their work. Surprisingly, composite objects such as a forest stand were most relevant followed by individual objects such as single trees and, lastly, more generalized categorizes or meta-objects such as "forested area". We have drawn some conclusions that will help to clarify the different types of scale in regard to their practical use.
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Affiliation(s)
- Zahra Dabiri
- Department of Geoinformatics-Z_GIS, University of Salzburg, Salzburg, Austria
| | - Thomas Blaschke
- Department of Geoinformatics-Z_GIS, University of Salzburg, Salzburg, Austria
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Benoit-Bird KJ, Lawson GL. Ecological Insights from Pelagic Habitats Acquired Using Active Acoustic Techniques. ANNUAL REVIEW OF MARINE SCIENCE 2015; 8:463-490. [PMID: 26515810 DOI: 10.1146/annurev-marine-122414-034001] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Marine pelagic ecosystems present fascinating opportunities for ecological investigation but pose important methodological challenges for sampling. Active acoustic techniques involve producing sound and receiving signals from organisms and other water column sources, offering the benefit of high spatial and temporal resolution and, via integration into different platforms, the ability to make measurements spanning a range of spatial and temporal scales. As a consequence, a variety of questions concerning the ecology of pelagic systems lend themselves to active acoustics, ranging from organism-level investigations and physiological responses to the environment to ecosystem-level studies and climate. As technologies and data analysis methods have matured, the use of acoustics in ecological studies has grown rapidly. We explore the continued role of active acoustics in addressing questions concerning life in the ocean, highlight creative applications to key ecological themes ranging from physiology and behavior to biogeography and climate, and discuss emerging avenues where acoustics can help determine how pelagic ecosystems function.
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Affiliation(s)
- Kelly J Benoit-Bird
- College of Earth, Ocean, and Atmospheric Sciences, Oregon State University, Corvallis, Oregon 97333;
| | - Gareth L Lawson
- Biology Department, Woods Hole Oceanographic Institution, Woods Hole, Massachusetts 02543;
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Kearney B, Farebrother G. Inadequate evaluation and management of threats in Australia's Marine Parks, including the Great Barrier Reef, misdirect Marine conservation. ADVANCES IN MARINE BIOLOGY 2014; 69:253-288. [PMID: 25358302 DOI: 10.1016/b978-0-12-800214-8.00007-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The magnificence of the Great Barrier Reef and its worthiness of extraordinary efforts to protect it from whatever threats may arise are unquestioned. Yet almost four decades after the establishment of the Great Barrier Reef Marine Park, Australia's most expensive and intensely researched Marine Protected Area, the health of the Reef is reported to be declining alarmingly. The management of the suite of threats to the health of the reef has clearly been inadequate, even though there have been several notable successes. It is argued that the failure to prioritise correctly all major threats to the reef, coupled with the exaggeration of the benefits of calling the park a protected area and zoning subsets of areas as 'no-take', has distracted attention from adequately addressing the real causes of impact. Australia's marine conservation efforts have been dominated by commitment to a National Representative System of Marine Protected Areas. In so doing, Australia has displaced the internationally accepted primary priority for pursuing effective protection of marine environments with inadequately critical adherence to the principle of having more and bigger marine parks. The continuing decline in the health of the Great Barrier Reef and other Australian coastal areas confirms the limitations of current area management for combating threats to marine ecosystems. There is great need for more critical evaluation of how marine environments can be protected effectively and managed efficiently.
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Affiliation(s)
- Bob Kearney
- Emeritus Professor in Fisheries Management, Institute for Applied Ecology, University of Canberra, Bruce ACT, Australia
| | - Graham Farebrother
- Sydney Fish Market, Pyrmont, NSW, Australia and Fisheries Aquaculture and Coasts Centre, Institute for Marine and Antarctic Studies, University of Tasmania, Hobart, Tasmania, Australia.
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Webb TJ. Marine and terrestrial ecology: unifying concepts, revealing differences. Trends Ecol Evol 2012; 27:535-41. [DOI: 10.1016/j.tree.2012.06.002] [Citation(s) in RCA: 80] [Impact Index Per Article: 6.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2012] [Revised: 06/12/2012] [Accepted: 06/13/2012] [Indexed: 11/25/2022]
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Webb TJ, Dulvy NK, Jennings S, Polunin NV. The birds and the seas: body size reconciles differences in the abundance-occupancy relationship across marine and terrestrial vertebrates. OIKOS 2011. [DOI: 10.1111/j.1600-0706.2011.18870.x] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Lianyong W, Eagles PF. Some theoretical considerations: From landscape ecology to waterscape ecology. ACTA ACUST UNITED AC 2009. [DOI: 10.1016/j.chnaes.2009.07.006] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Affiliation(s)
- Anthony J Richardson
- Climate Adaptations Flagship--Commonwealth Scientific and Industrial Research Organisation (CSIRO) Marine and Atmospheric Research, Post Office Box 120, Cleveland, Queensland 4163, Australia.
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McGEOGH MELODIEA. The selection, testing and application of terrestrial insects as bioindicators. Biol Rev Camb Philos Soc 2007. [DOI: 10.1111/j.1469-185x.1997.tb00029.x] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Gilman SE. Life at the edge: an experimental study of a poleward range boundary. Oecologia 2006; 148:270-9. [PMID: 16477473 DOI: 10.1007/s00442-006-0372-9] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2005] [Accepted: 01/18/2006] [Indexed: 10/25/2022]
Abstract
Experimental studies of biogeographic processes are important, but rarely attempted because of the logistical challenges of research at large spatial scales. I used a series of large-scale transplant experiments to investigate the mechanisms controlling species abundance near a poleward range boundary. The intertidal limpet Collisella scabra experiences a 100-fold decline in abundance over the northernmost 300 km of its range. Temperature and food supply both strongly influenced individual survival, growth, and maturation. Regression analysis also revealed significant interactions among these conditions: the effect of one could not be predicted without knowing the level of the other. But these relationships could not explain geographic abundance patterns. Instead, individual limpets were highly successful at sites with relatively low abundance. These results suggest that, even though temperature is important to the success of individual C. scabra populations, the primary effect of warming temperatures under climate change may not be a shift in geographic distribution.
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Affiliation(s)
- Sarah E Gilman
- Section of Evolution and Ecology, and, Center for Population Biology, University of California, Davis, CA 95616, USA.
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Ferguson S, Taylor M, Born E, Rosing‐Asvid A, Messier F. Determinants of Home Range Size for Polar Bears (
Ursus maritimus
). Ecol Lett 2002; 2:311-318. [DOI: 10.1046/j.1461-0248.1999.00090.x] [Citation(s) in RCA: 124] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Affiliation(s)
- S.H. Ferguson
- Department of Biology, University of Saskatchewan, 112 Science Place, Saskatoon, SK, S7N 5E2, Canada.,
| | - M.K. Taylor
- Department of Sustainable Development, Government of Nunavut, Bag 1340, Iqaluit, NT, X0 A 0H0, Canada.,
| | - E.W. Born
- Greenland Institute of Natural Resources, PO Box 570, DK‐3900 Nuuk, Greenland.,
| | - A. Rosing‐Asvid
- Greenland Institute of Natural Resources, PO Box 570, DK‐3900 Nuuk, Greenland.,
| | - F. Messier
- Department of Biology, University of Saskatchewan, 112 Science Place, Saskatoon, SK, S7N 5E2, Canada
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22
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Smith RC, Baker KS, Stammerjohn SE. Exploring Sea Ice Indexes for Polar Ecosystem Studies. Bioscience 1998. [DOI: 10.2307/1313133] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
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Abstract
Because water has a higher heat capacity than air, large bodies of water fluctuate in temperature more slowly than does the atmosphere. Marine temperature time series are 'redder' than atmospheric temperature time series by analogy to light: in red light, low-frequency variability has greater amplitude than high-frequency variability, whereas in white light all frequencies have the same amplitude. Differences in the relative importance of high-and low-frequency variability in different habitats affect the population dynamics of individual species and the structure of ecological communities. Population dynamics of individual species are thought to be dominated by low-frequency fluctuations, that is, to display reddened fluctuations. Here I report, however, that in eight nonlinear, iterative, deterministic, autonomous, discrete-time population models, some of which have been used to model real biological populations, the power spectral densities of chaotic trajectories are neither white nor reddened but are notably blue, with increasing power at higher frequencies.
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Affiliation(s)
- J E Cohen
- Rockefeller University, New York, New York 10021-6399, USA
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