Sea Level Rise, Subsidence, and Wetland Loss. This video describes causes of wetland loss in the Mississippi River Delta. Rapid land subsidence due to sediment compaction and dewatering increases the rate of submergence in this deltaic system.
Images
!["Sea Level Rise, Subsidence, and Wetland Loss" video screenshot](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/masonry/public/thumbnails/image/v20-6-Screen%20Shot%202018-10-28%20at%2011.40.58%20AM%20copy__1546618699362.png?itok=B8Vd1Ezc)
Sea Level Rise, Subsidence, and Wetland Loss. This video describes causes of wetland loss in the Mississippi River Delta. Rapid land subsidence due to sediment compaction and dewatering increases the rate of submergence in this deltaic system.
![A long barrier island, mainly sandy with some vegetation, has a sediment berm placed along the shoreface.](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/masonry/public/thumbnails/image/Karen_2010_final%20berm%20shot_Original2.jpg?itok=_ENOWc3h)
Sediment berm placement in the shoreface of northern Chandeleur Islands, Louisiana
Sediment berm placement in the shoreface of northern Chandeleur Islands, Louisiana
Simulation results for geomorphic change in Suisun Bay, CA (Ganju and Schoellhamer, 2010)
Simulation results for geomorphic change in Suisun Bay, CA (Ganju and Schoellhamer, 2010)
Water molecules (1 red oxygen and 2 white hydrogens) form a pentagonal dodecahedron around a methane molecule (1 gray carbon and 4 green hydrogens). This represents 2 of the 8 parts of the typical Structure I gas hydrate molecule.
Water molecules (1 red oxygen and 2 white hydrogens) form a pentagonal dodecahedron around a methane molecule (1 gray carbon and 4 green hydrogens). This represents 2 of the 8 parts of the typical Structure I gas hydrate molecule.
The Instrumented Pressure Testing Chamber (IPTC). A device for measuring the physical properties of naturally-occurring, hydrate-bearing sediment at nearly in situ pressure conditions
The Instrumented Pressure Testing Chamber (IPTC). A device for measuring the physical properties of naturally-occurring, hydrate-bearing sediment at nearly in situ pressure conditions
The R/V Rafael performs nearshore geophysical surveys, and includes high resolution sub-bottom profiling, sidescan sonar, and multibeam echosounding in its arsenal of survey capabilities.
The R/V Rafael performs nearshore geophysical surveys, and includes high resolution sub-bottom profiling, sidescan sonar, and multibeam echosounding in its arsenal of survey capabilities.
Tony Fischbach (USGS) on the beach with a tagged walrus near Point Lay, Alaska, on September 1, 2010. Walruses gathered on Alaskan shores of the Chukchi Sea by the tens of thousands in late August and September 2010 after the last of the sea ice dissipated.
Tony Fischbach (USGS) on the beach with a tagged walrus near Point Lay, Alaska, on September 1, 2010. Walruses gathered on Alaskan shores of the Chukchi Sea by the tens of thousands in late August and September 2010 after the last of the sea ice dissipated.
![Photo of bleaching colony of elliptical star coral, Dichocoenia stokesii, Florida Keys.](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/masonry/public/thumbnails/image/BlDicSto2010A.jpg?itok=MbGNiLyu)
Bleaching colony of elliptical star coral, Dichocoenia stokesii, Florida Keys. When corals are stressed, the symbiosis between the coral animal and its photosynthetic algal symbionts (zooxanthellae) breaks down and the zooxanthellae are expelled from the coral tissue.
Bleaching colony of elliptical star coral, Dichocoenia stokesii, Florida Keys. When corals are stressed, the symbiosis between the coral animal and its photosynthetic algal symbionts (zooxanthellae) breaks down and the zooxanthellae are expelled from the coral tissue.
![Photo of bleaching colony of elliptical star coral, Dichocoenia stokesii](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/masonry/public/thumbnails/image/BlDicSto2010B.jpg?itok=6UIRwwcy)
Bleaching colony of elliptical star coral, Dichocoenia stokesii, Florida Keys. When corals are stressed, the symbiosis between the coral animal and its photosynthetic algal symbionts (zooxanthellae) breaks down and the zooxanthellae are expelled from the coral tissue.
Bleaching colony of elliptical star coral, Dichocoenia stokesii, Florida Keys. When corals are stressed, the symbiosis between the coral animal and its photosynthetic algal symbionts (zooxanthellae) breaks down and the zooxanthellae are expelled from the coral tissue.
![Photo of bleaching colony of symmetrical brain coral, Diploria strigosa](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/masonry/public/thumbnails/image/BlDipStr2010A.jpg?itok=WOT4wecw)
Bleaching colony of symmetrical brain coral, Diploria strigosa, Florida Keys. When corals are stressed, the symbiosis between the coral animal and its photosynthetic algal symbionts (zooxanthellae) breaks down and the zooxanthellae are expelled from the coral tissue.
Bleaching colony of symmetrical brain coral, Diploria strigosa, Florida Keys. When corals are stressed, the symbiosis between the coral animal and its photosynthetic algal symbionts (zooxanthellae) breaks down and the zooxanthellae are expelled from the coral tissue.
![Photo of bleaching colony of symmetrical brain coral, Diploria strigosa](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/masonry/public/thumbnails/image/BlDipStr2010B.jpg?itok=CWSBgtBD)
Bleaching colony of symmetrical brain coral, Diploria strigosa, Florida Keys. When corals are stressed, the symbiosis between the coral animal and its photosynthetic algal symbionts (zooxanthellae) breaks down and the zooxanthellae are expelled from the coral tissue.
Bleaching colony of symmetrical brain coral, Diploria strigosa, Florida Keys. When corals are stressed, the symbiosis between the coral animal and its photosynthetic algal symbionts (zooxanthellae) breaks down and the zooxanthellae are expelled from the coral tissue.
![Photo of bleaching colony of lobed star coral, Montastraea annularis](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/masonry/public/thumbnails/image/BlMann2010A.jpg?itok=7vIV95LZ)
Bleaching colony of lobed star coral, Montastraea annularis, Florida Keys. When corals are stressed, the symbiosis between the coral animal and its photosynthetic algal symbionts (zooxanthellae) breaks down and the zooxanthellae are expelled from the coral tissue.
Bleaching colony of lobed star coral, Montastraea annularis, Florida Keys. When corals are stressed, the symbiosis between the coral animal and its photosynthetic algal symbionts (zooxanthellae) breaks down and the zooxanthellae are expelled from the coral tissue.
![Photo of bleaching colony of great star coral, Montastraea cavernosa](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/masonry/public/thumbnails/image/BlMcav2010A.jpg?itok=gLfvexsd)
Bleaching colony of great star coral, Montastraea cavernosa, Florida Keys. When corals are stressed, the symbiosis between the coral animal and its photosynthetic algal symbionts (zooxanthellae) breaks down and the zooxanthellae are expelled from the coral tissue.
Bleaching colony of great star coral, Montastraea cavernosa, Florida Keys. When corals are stressed, the symbiosis between the coral animal and its photosynthetic algal symbionts (zooxanthellae) breaks down and the zooxanthellae are expelled from the coral tissue.
![Photo of bleaching colony of great star coral, Montastraea cavernosa, with polyps extended, Florida Keys.](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/masonry/public/thumbnails/image/BlMcav2010B.jpg?itok=CE-bHwbd)
Bleaching colony of great star coral, Montastraea cavernosa, with polyps extended, Florida Keys. When corals are stressed, the symbiosis between the coral animal and its photosynthetic algal symbionts (zooxanthellae) breaks down and the zooxanthellae are expelled from the coral tissue.
Bleaching colony of great star coral, Montastraea cavernosa, with polyps extended, Florida Keys. When corals are stressed, the symbiosis between the coral animal and its photosynthetic algal symbionts (zooxanthellae) breaks down and the zooxanthellae are expelled from the coral tissue.
![bleaching colony of star coral](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/masonry/public/thumbnails/image/BlMfav2010A_0.jpg?itok=0qL-7B2O)
Bleaching colonies of mountainous star coral, Montastraea faveolata, Florida Keys. When corals are stressed, the symbiosis between the coral animal and its photosynthetic algal symbionts (zooxanthellae) breaks down and the zooxanthellae are expelled from the coral tissue.
Bleaching colonies of mountainous star coral, Montastraea faveolata, Florida Keys. When corals are stressed, the symbiosis between the coral animal and its photosynthetic algal symbionts (zooxanthellae) breaks down and the zooxanthellae are expelled from the coral tissue.
![Photo of bleaching colonies of mustard hill coral, Porites astreoides, Florida Keys.](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/masonry/public/thumbnails/image/BlPor2010A.jpg?itok=A93-oR5z)
Bleaching colonies of mustard hill coral, Porites astreoides, both green and brown color morphs, Florida Keys. When corals are stressed, the symbiosis between the coral animal and its photosynthetic algal symbionts (zooxanthellae) breaks down and the zooxanthellae are expelled from the coral tissue.
Bleaching colonies of mustard hill coral, Porites astreoides, both green and brown color morphs, Florida Keys. When corals are stressed, the symbiosis between the coral animal and its photosynthetic algal symbionts (zooxanthellae) breaks down and the zooxanthellae are expelled from the coral tissue.
![Photo of bleaching colony of mustard hill coral, Porites astreoides, Florida Keys.](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/masonry/public/thumbnails/image/BlPor2010B.jpg?itok=gMth_7bg)
Bleaching colony of mustard hill coral, Porites astreoides, Florida Keys. When corals are stressed, the symbiosis between the coral animal and its photosynthetic algal symbionts (zooxanthellae) breaks down and the zooxanthellae are expelled from the coral tissue.
Bleaching colony of mustard hill coral, Porites astreoides, Florida Keys. When corals are stressed, the symbiosis between the coral animal and its photosynthetic algal symbionts (zooxanthellae) breaks down and the zooxanthellae are expelled from the coral tissue.
![Photo of bleaching colony of massive starlet coral, Siderastrea siderea, Florida Keys.](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/masonry/public/thumbnails/image/BlSidSid2010A.jpg?itok=zMtqdb7r)
Bleaching colony of massive starlet coral, Siderastrea siderea, Florida Keys. When corals are stressed, the symbiosis between the coral animal and its photosynthetic algal symbionts (zooxanthellae) breaks down and the zooxanthellae are expelled from the coral tissue.
Bleaching colony of massive starlet coral, Siderastrea siderea, Florida Keys. When corals are stressed, the symbiosis between the coral animal and its photosynthetic algal symbionts (zooxanthellae) breaks down and the zooxanthellae are expelled from the coral tissue.
![Photo of bleaching colony of massive starlet coral, Siderastrea siderea, Florida Keys.](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/masonry/public/thumbnails/image/BlSidSid2010B.jpg?itok=L_pjjE5P)
Bleaching colony of massive starlet coral, Siderastrea siderea, Florida Keys. When corals are stressed, the symbiosis between the coral animal and its photosynthetic algal symbionts (zooxanthellae) breaks down and the zooxanthellae are expelled from the coral tissue.
Bleaching colony of massive starlet coral, Siderastrea siderea, Florida Keys. When corals are stressed, the symbiosis between the coral animal and its photosynthetic algal symbionts (zooxanthellae) breaks down and the zooxanthellae are expelled from the coral tissue.
![Photo of bleaching colony of blushing star coral, Stephanocoenia intersepta/michelinii.](https://d9-wret.s3.us-west-2.amazonaws.com/assets/palladium/production/s3fs-public/styles/masonry/public/thumbnails/image/BlSteph2010A.jpg?itok=vAzjQOrO)
Bleaching colony of blushing star coral, Stephanocoenia intersepta/michelinii. When corals are stressed, the symbiosis between the coral animal and its photosynthetic algal symbionts (zooxanthellae) breaks down and the zooxanthellae are expelled from the coral tissue.
Bleaching colony of blushing star coral, Stephanocoenia intersepta/michelinii. When corals are stressed, the symbiosis between the coral animal and its photosynthetic algal symbionts (zooxanthellae) breaks down and the zooxanthellae are expelled from the coral tissue.
Bleaching colony of blushing star coral, Stephanocoenia intersepta/michelinii.
Bleaching colony of blushing star coral, Stephanocoenia intersepta/michelinii.