Knowledge Tree
marine mammals
Also known as: marine mammal
Facts (39)
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A review of climate change impacts on migration patterns of marine ... frontiersin.org Oct 25, 2024 31 facts
claimPredatory fishes, seabirds, and marine mammals serve as sentinels of ecosystem health as upper trophic level consumers, according to Moore et al. (2014), Sydeman et al. (2015), and Moore and Kuletz (2019).
claimFish species in the Arctic may respond more directly and quickly to physical changes than other marine vertebrates, but they are generally more limited in mobility than seabirds and marine mammals.
claimSubarctic fish species often contain fewer lipids than Arctic species or serve as an unpredictable food source, which reduces their energetic value and predictability for seabirds and marine mammals (Österblom et al., 2008; Gaston et al., 2009; Hop and Gjøsæter, 2013; Descamps and Strøm, 2021).
claimMarine mammals have altered their timing and spatial migratory patterns, but the effectiveness of these changes is limited by prey availability and the presence of new top predators in their environment.
claimGlobal warming has induced variability in the timing of migration for many marine mammal species, including Arctic endemics.
referenceBogstad et al. (2015) reviewed the competition for food between cod and marine mammals in the Barents Sea.
claimMany seasonal migrant marine mammals are benefiting from longer open-water seasons and are tracking northward shifts of their prey species.
claimNew migratory movements have led to overlaps between species, causing disruptions in food webs and altered predator-prey relationships, such as the competition for prey between Atlantic cod and marine mammals in the Barents Sea, as reported by Bogstad et al. (2015).
claimIncreased ship traffic and human activities in the Arctic are anticipated to affect the movement patterns of Arctic cod, seabirds, and marine mammals.
referenceHurley et al. (2015) identified biologically important pelagic areas by analyzing seasonal spatial patterns in the distribution of seabirds and marine mammals in the eastern Chukchi and western Beaufort seas.
claimMigratory marine mammal species are fundamental to the nutritional, spiritual, and cultural aspects of Indigenous life in coastal Arctic Alaska communities.
referenceMany marine mammals have adjusted to changing environmental conditions by arriving earlier and staying longer in summer Arctic foraging areas, utilizing their large body size and body fat reserves (Hauser et al., 2017; Szesciorka et al., 2024).
claimPredatory fishes, seabirds, and marine mammals are important food resources for people relying on Arctic marine ecosystems for subsistence and serve as cultural cornerstones, as noted by Guyot et al. (2006) and Huntington et al. (2013; 2016).
claimUnusual Mortality Events among ice-dependent marine mammal species in the Pacific Arctic have been linked to reductions in sea ice, as reported by Barratclough et al. in 2023.
claimAnadromous and marine fishes, certain marine mammals, and at least three species of seabirds exhibit resident migration patterns within Subarctic or Arctic areas.
claimIncreasing distances to northern ice edges are likely to become energetically limiting for some marine mammals (Freitas et al., 2008; Lydersen et al., 2014).
referenceArctic marine mammals are increasingly vulnerable to vessel traffic in the Northwest Passage and Northern Sea Route due to the region becoming increasingly ice-free, according to a 2018 study by Hauser et al.
claimClimate change is impacting endemic Arctic marine mammals through direct habitat alterations, ecosystem changes, and changing patterns of human activity.
claimThe authors conducted a review of scientific literature to synthesize information on the impact of climate change on migratory Arctic marine vertebrates, including fishes, seabirds, and marine mammals, to inform decision-makers.
perspectiveMoore and Hauser (2019) advocate for integrating conventional science and indigenous knowledge to track Arctic ecosystem variability, specifically regarding marine mammal ecology and health.
referenceSome marine mammal species have individuals that remain in High Arctic areas year-round, which increases opportunities for population exchange (Insley et al., 2021; Heide-Jørgenson et al., 2011; Ahonen et al., 2021; Diogou et al., 2023).
claimThe distribution of zooplankton, pelagic and benthic invertebrates, and forage fishes influences the migration patterns of upper trophic level vertebrates, including seabirds, marine mammals, and anadromous fishes.
claimResident species in Subarctic or Arctic areas spend most or all of their life cycle within those regions but exhibit regular movements within those areas, a pattern observed in some anadromous and marine fishes, certain marine mammals, and at least three species of seabirds.
referenceHuntington et al. (2016) used traditional knowledge interviews to document the effects of changing sea ice on marine mammals and subsistence hunters in northern Alaska.
claimIn the Chukchi Sea, episodic environmental conditions create foraging hotspots for seabirds and marine mammals during the late summer and fall migration period, which may influence the timing and spatial patterns of migration, as reported by Kuletz et al. (2015).
referenceKovacs et al. (2021) provided an update on the status of marine mammals in the 2021 State of the Arctic Marine Biodiversity Report (SAMBR).
claimClimate change is altering seasonal habitats and food bases for fishes, seabirds, and marine mammals throughout the circumpolar Arctic.
referenceLydersen et al. (2014) established the importance of tidewater glaciers as habitats for marine mammals and seabirds in Svalbard, Norway.
claimShifting ranges northward to track optimal environmental conditions is a predicted response to climate change for Arctic animals, particularly for highly mobile, large-bodied marine mammals.
referenceArctic marine vertebrates are categorized into three groups regarding migration: 1) Arctic residents with seasonal movements (species that complete their life cycle within the Arctic but move seasonally), 2) Breeding migrants (seabirds that enter the Arctic to breed and migrate south in the fall), and 3) Summer visitors for feeding (boreal fishes, seabirds, and marine mammals that arrive in the northern summer to feed but breed elsewhere).
claimPolynyas, ice edges, and leads are important habitats for marine mammals and birds, as asserted by I. Stirling in 1997.
The role of Plant Foods in the evolution and Dispersal of early Humans kernsverlag.com Jul 30, 2022 3 facts
claimModern instances of hyper-carnivorism, such as arctic living (relying on blubber-rich marine mammals) and pastoralism (relying on domesticated animals), are recent adaptations to marginal environments (Vasil‘ev et al.).
claimSome Neanderthal populations in the southern latitudes of Europe exploited significant quantities of small vertebrates, avifauna, fish, marine mammals, and shellfish.
referenceStringer et al. (2008) documented evidence of Neanderthal exploitation of marine mammals in Gibraltar.
Climate Change & Its Impact on Migration and Breeding Cycles husson.edu Aug 20, 2025 2 facts
claimWarming waters and changing seasonal habitats in the Arctic and Subarctic are altering migration and breeding patterns for fish, seabirds, and marine mammals.
measurementMore than 70% of marine mammal populations in U.S. waters, including humpback and right whales, are highly vulnerable to climate-induced threats such as habitat loss, reduced food availability, and disrupted sonar communication.
Comparable Ages for the Independent Origins of Electrogenesis in ... journals.plos.org 1 fact
claimResearch on the sensory capabilities of aquatic mammals that might have independently evolved electroreception is currently limited to a single captive specimen trained to respond to weak electric fields, indicating a need for further investigation.
biological classification - Students | Britannica Kids | Homework Help kids.britannica.com 1 fact
claimThe Order Cetacea is a marine mammal order that includes porpoises, dolphins, and whales.
Ecologists Study the Interactions of Organisms and Their Environment nature.com 1 fact
claimNutrients from terrestrial systems are transported into lakes and oceans, where primary production by phytoplankton and algae supports communities of zooplankton, fish, sea mammals, and birds.