Scientists discovered that melting icebergs in the Arctic Ocean are transporting rocks to the seafloor
GS3Economy · S&T · Environment · Security· Climate change & international agreements· Prelims·
Why in news
Scientists discovered that melting icebergs in the Arctic Ocean are transporting rocks to the seafloor, creating 'dropstones' that form new deep-sea habitats for corals and sponges.
Background
Researchers from the Alfred Wegener Institute and Woods Hole Oceanographic Institution identified these habitats at depths of 2,500 metres. The process involves debris-laden icebergs depositing rocks onto the seafloor, transforming the seabed into hard surfaces for marine life.
Facts for Prelims
- EnvironmentDropstones: Rocks transported by icebergs to the seafloor, creating hard substrates for marine organisms.
- PlaceArctic Ocean: Region experiencing rapid ecosystem shifts due to climate-induced iceberg melting.
- S&TMarine organisms: Sponges and corals are the primary species colonizing these newly formed deep-sea habitats.
For Mains
Q. Discuss how climate-induced changes in Arctic cryospheric dynamics are altering deep-sea biodiversity and marine ecosystems.
Dimensions to cover in your answer
- Ecological shift: Transformation of soft-sediment seafloors into hard-substrate habitats for sessile organisms.
- Feedback loops: Accelerated melting of Arctic ice contributing to rapid and unpredictable benthic habitat modification.
- Biodiversity alteration: Potential displacement of native deep-sea species by colonizing organisms on newly formed dropstones.
Keywords: Cryospheric dynamics · Benthic ecosystems · Habitat modification · Marine biodiversity · Climate-induced shifts
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