https://cdn.earthdata.nasa.gov/conduit/upload/5182/KeywordsCommunityGuide_Baseline_v1_SIGNED_FINAL.pdf 23.6 2026-03-19T10:41:57.720Z https://gcmd.earthdata.nasa.gov/KeywordViewer/scheme/sciencekeywords/4cf1a3bd-20ce-42d7-95ac-9a4ece7be12c 2021-10-06 MARINE MAMMALS Date=2021-10-06 User Id=tstevens Entity=NarrowerRelation Operation=INSERT User Note=Insert Concept System Note=add narrower relation New Value=MARINE MAMMALS [4cf1a3bd-20ce-42d7-95ac-9a4ece7be12c,763836] - PINNIPED [a659fc9d-9d6a-4e47-b052-9270baa48dd4,763837] Date=2021-10-06 User Id=tstevens Entity=BroaderRelation Operation=DELETE User Note=Move Concepts System Note=delete broader relation Old Value=MARINE MAMMALS [4cf1a3bd-20ce-42d7-95ac-9a4ece7be12c,763836] - ANIMALS/INVERTEBRATES [abc6f016-d1f0-4725-b847-639de054d13f,760588] Date=2021-10-12 User Id=tstevens Entity=NarrowerRelation Operation=INSERT User Note=Insert Concept System Note=add narrower relation New Value=MARINE MAMMALS [4cf1a3bd-20ce-42d7-95ac-9a4ece7be12c,763836] - DOLPHINS [557e8ffd-807d-41b7-9cd3-ccc3f2690cf5,763849] Date=2021-10-06 User Id=tstevens Entity=Definition Operation=INSERT System Note=insert Definition New Value=id: null text: Marine mammals represent three different orders of mammals: the Carnivora, Cetacea, and Sirenia. Species in these orders occupy typically marine habitats and evolved similar anatomical features, including large body size, streamlined shape (compared to terrestrial relatives), insulation in the form of blubber and dense fur, and in most cases, a modified appendicular skeleton resulting in reduction in the size of appendages. Marine mammals also possess some similar physiological adaptations (e.g., for diving, thermoregulation, osmoregulation, communication, and orientation) to permit them to exploit the aquatic environment. language code: en Date=2021-10-06 User Id=tstevens Entity=BroaderRelation Operation=INSERT User Note=Insert Concept System Note=add broader relation New Value=MARINE MAMMALS [4cf1a3bd-20ce-42d7-95ac-9a4ece7be12c,763836] - ANIMALS/INVERTEBRATES [abc6f016-d1f0-4725-b847-639de054d13f,760588] Date=2021-10-06 User Id=tstevens Entity=BroaderRelation Operation=INSERT User Note=Move Concepts System Note=add broader relation New Value=MARINE MAMMALS [4cf1a3bd-20ce-42d7-95ac-9a4ece7be12c,763836] - ANIMALS/VERTEBRATES [14802b53-b702-438f-8c8a-f51506807ce6,760885] Marine mammals represent three different orders of mammals: the Carnivora, Cetacea, and Sirenia. Species in these orders occupy typically marine habitats and evolved similar anatomical features, including large body size, streamlined shape (compared to terrestrial relatives), insulation in the form of blubber and dense fur, and in most cases, a modified appendicular skeleton resulting in reduction in the size of appendages. Marine mammals also possess some similar physiological adaptations (e.g., for diving, thermoregulation, osmoregulation, communication, and orientation) to permit them to exploit the aquatic environment. 2021-10-12 12:59:00.0