排序方式: 共有10条查询结果,搜索用时 15 毫秒
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Ward Delphi Melbourne-Thomas Jessica Pecl Gretta T. Evans Karen Green Madeline McCormack Phillipa C. Novaglio Camilla Trebilco Rowan Bax Narissa Brasier Madeleine J. Cavan Emma L. Edgar Graham Hunt Heather L. Jansen Jan Jones Russ Lea Mary-Anne Makomere Reuben Mull Chris Semmens Jayson M. Shaw Janette Tinch Dugald van Steveninck Tatiana J. Layton Cayne 《Reviews in Fish Biology and Fisheries》2022,32(1):65-100
Reviews in Fish Biology and Fisheries - Marine ecosystems and their associated biodiversity sustain life on Earth and hold intrinsic value. Critical marine ecosystem services include maintenance of... 相似文献
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Modelled mid-trophic pelagic prey fields improve understanding of marine predator foraging behaviour
D. B. Green S. Bestley R. Trebilco S. P. Corney P. Lehodey C. R. McMahon C. Guinet Mark A. Hindell 《Ecography》2020,43(7):1014-1026
Biophysical interactions are influential in determining the scale of key ecological processes within marine ecosystems. For oceanic predators, this means foraging behaviour is influenced by processes shaping the distribution of prey. However, oceanic prey is difficult to observe and its abundance and distribution is regionally generalised. We use a spatiotemporally resolved simulation model to describe mid-trophic prey distribution within the Southern Ocean and demonstrate insights that this modelled prey field provides into the foraging behaviour of a widely distributed marine predator, the southern elephant seal. From a five-year simulation of prey biomass, we computed climatologies of mean prey biomass (average prey conditions) and prey biomass variability (meso-scale variability). We also compiled spatially gridded metrics of seal density and diving behaviour from 13 yr of tracking data. We statistically modelled these metrics as non-linear functions of prey biomass (both mean and variability) and used these to predict seal distribution and behaviour. Our predictions were consistent with observations (R2adj = 0.23), indicating that seals aggregate in regions of high mesoscale activity where eddies concentrate prey. Here, seals dived deeper (R2marg = 0.12, R2cond = 0.51) and spent less time hunting (R2marg = 0.05, R2cond = 0.56), likely targeting deep but profitable prey patches. Seals generally avoided areas of low eddy activity where prey was likely dispersed. Most seals foraged south of the Subantarctic Front, despite north of the front exhibiting consistently high simulated prey biomasses. This likely reflects seal prey or habitat preferences, but also emphasises the importance of mesoscale prey biomass variability relative to regionally high mean biomass. This work demonstrates the value of coupling mechanistic representations of prey biomass with predator observations to provide insight into how biophysical processes combine to shape species distributions. This will be increasingly important for the robust prediction of species’ responses to rapid system change. 相似文献
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Farmery A. K. Alexander K. Anderson K. Blanchard J. L. Carter C. G. Evans K. Fischer M. Fleming A. Frusher S. Fulton E. A. Haas B. MacLeod C. K. Murray L. Nash K. L. Pecl G. T. Rousseau Y. Trebilco R. van Putten I. E. Mauli S. Dutra L. Greeno D. Kaltavara J. Watson R. Nowak B. 《Reviews in Fish Biology and Fisheries》2022,32(1):101-121
Reviews in Fish Biology and Fisheries - Food from the sea can make a larger contribution to healthy and sustainable diets, and to addressing hunger and malnutrition, through improvements in... 相似文献
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Melbourne-Thomas Jess Audzijonyte Asta Brasier Madeleine J. Cresswell Katherine A. Fogarty Hannah E. Haward Marcus Hobday Alistair J. Hunt Heather L. Ling Scott D. McCormack Phillipa C. Mustonen Tero Mustonen Kaisu Nye Janet A. Oellermann Michael Trebilco Rowan van Putten Ingrid Villanueva Cecilia Watson Reg A. Pecl Gretta T. 《Reviews in Fish Biology and Fisheries》2022,32(1):231-251
Reviews in Fish Biology and Fisheries - One of the most pronounced effects of climate change on the world’s oceans is the (generally) poleward movement of species and fishery stocks in... 相似文献
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McCormack Stacey A. Trebilco Rowan Melbourne-Thomas Jessica Blanchard Julia L. Fulton Elizabeth A. Constable Andrew 《Reviews in Fish Biology and Fisheries》2019,29(2):277-296
Reviews in Fish Biology and Fisheries - Marine ecosystem models that incorporate fisheries and climate change are essential for forecasting and guiding sustainable ecosystem management decisions. A... 相似文献
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Trebilco Rowan Fleming Aysha Hobday Alistair J. Melbourne-Thomas Jess Meyer Amelie McDonald Jan McCormack Phillipa C. Anderson Kelli Bax Narissa Corney Stuart P. Dutra Leo X. C. Fogarty Hannah E. McGee Jeffrey Mustonen Kaisu Mustonen Tero Norris Kimberley A. Ogier Emily Constable Andrew J. Pecl Gretta T. 《Reviews in Fish Biology and Fisheries》2022,32(1):39-63
Reviews in Fish Biology and Fisheries - Proactive and coordinated action to mitigate and adapt to climate change will be essential for achieving the healthy, resilient, safe, sustainably harvested... 相似文献
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Christine K. Weldrick Rowan Trebilco Diana M. Davies Kerrie M. Swadling 《Ecology and evolution》2019,9(14):8119-8132
Pteropods are a group of small marine gastropods that are highly sensitive to multiple stressors associated with climate change. Their trophic ecology is not well studied, with most research having focused primarily on the effects of ocean acidification on their fragile, aragonite shells. Stable isotopes analysis coupled with isotope‐based Bayesian niche metrics is useful for characterizing the trophic structure of biological assemblages. These approaches have not been implemented for pteropod assemblages. We used isotope‐based Bayesian niche metrics to investigate the trophic relationships of three co‐occurring pteropod species, with distinct feeding behaviors, sampled from the Southern Kerguelen Plateau area in the Indian Sector of the Southern Ocean—a biologically and economically important but poorly studied region. Two of these species were gymnosomes (shell‐less pteropods), which are traditionally regarded as specialist predators on other pteropods, and the third species was a thecosome (shelled pteropod), which are typically generalist omnivores. For each species, we aimed to understand (a) variability and overlap among isotopic niches; and (b) whether there was a relationship between body size and trophic position. Observed isotopic niche areas were broadest for gymnosomes, especially Clione limacina antarctica, whose observed isotopic niche area was wider than expected on both δ13C and δ15N value axes. We also found that trophic position significantly increased with increasing body length for Spongiobranchaea australis. We found no indication of a dietary shift toward increased trophic position with increasing body size for Clio pyramidata f. sulcata. Trophic positions ranged from 2.8 to 3.5, revealing an assemblage composed of both primary and secondary consumer behaviors. This study provides a comprehensive comparative analysis on trophodynamics in Southern Ocean pteropod species, and supports previous studies using gut content, fatty acid and stable isotope analyses. Combined, our results illustrate differences in intraspecific trophic behavior that may be attributed to differential feeding strategies at species level. 相似文献
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Stacey A. McCormack Jessica Melbourne‐Thomas Rowan Trebilco Julia L. Blanchard Ben Raymond Andrew Constable 《Ecology and evolution》2021,11(1):227-241
Understanding regional‐scale food web structure in the Southern Ocean is critical to informing fisheries management and assessments of climate change impacts on Southern Ocean ecosystems and ecosystem services. Historically, a large component of Southern Ocean ecosystem research has focused on Antarctic krill, which provide a short, highly efficient food chain, linking primary producers to higher trophic levels. Over the last 15 years, the presence of alternative energy pathways has been identified and hypotheses on their relative importance in different regions raised. Using the largest circumpolar dietary database ever compiled, we tested these hypotheses using an empirical circumpolar comparison of food webs across the four major regions/sectors of the Southern Ocean (defined as south of 40°S) within the austral summer period. We used network analyses and generalizations of taxonomic food web structure to confirm that while Antarctic krill are dominant as the mid‐trophic level for the Atlantic and East Pacific food webs (including the Scotia Arc and Western Antarctic Peninsula), mesopelagic fish and other krill species are dominant contributors to predator diets in the Indian and West Pacific regions (East Antarctica and the Ross Sea). We also highlight how tracking data and habitat modeling for mobile top predators in the Southern Ocean show that these species integrate food webs over large regional scales. Our study provides a quantitative assessment, based on field observations, of the degree of regional differentiation in Southern Ocean food webs and the relative importance of alternative energy pathways between regions. 相似文献
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