Tag: coral

What’s a man-made reef?

the USS Spiegel Grove, sunken to be used as an artificial reef

Can you see the sunken ship?

In June 2002, the retired USS Spiegel Grove  was sunk in waters off Key Largo. At 510 toes (155.45 meters) lengthy, the ship was, on the time, the most important vessel ever deliberately scuttled for the aim of making a man-made reef.

Submerged shipwrecks are the most typical type of synthetic reef. Oil and gasoline platforms, bridges, lighthouses, and different offshore buildings usually operate as synthetic reefs. Marine useful resource managers additionally create synthetic reefs in underwater areas that require a construction to reinforce the habitat for reef organisms, together with tender and stony corals and the fishes and invertebrates that reside amongst them.

Supplies used to assemble synthetic reefs have included rocks, cinder blocks, and even wooden and outdated tires. These days, a number of firms specialize within the design, manufacture, and deployment of long-lasting synthetic reefs which might be sometimes constructed of limestone, metal, and concrete.

In 1986, the Thunderbolt was intentionally sunk in 120 feet (36.6 meters) of water four miles south of Marathon and Key Colony Beach in Florida. The ship’s superstructure is now home to colorful sponges, corals, and hydroids, providing food and habitat for a variety of sea creatures.

A very good view from contained in the Thunderbolt.

In 1986, the Thunderbolt   was deliberately sunk in 120 toes (36.6 meters) of water 4 miles south of Marathon and Key Colony Seashore in Florida. The ship’s superstructure is now house to colourful sponges, corals, and hydroids, offering meals and habitat for a wide range of sea creatures.

The Florida Keys Nationwide Marine Sanctuary incorporates a number of decommissioned vessels that had been sunk in particular areas for diving or fishing alternatives previous to the world’s designation as a nationwide marine sanctuary. One of the crucial well-known is the U.S. Coast Guard Cutter Duane, which served on the seas for half a century earlier than its ultimate task as an underwater haven for sea life.

Deliberate artifical reefs might present native financial advantages as a result of they appeal to fish to a recognized location and are subsequently fashionable points of interest for business and leisure fishermen, divers, and snorkelers. Nonetheless, the rise in unlawful dumping for the function of making habitat has led to vital poaching within the Florida Keys and subsequent high-profile arrests by NOAA’s Workplace of Regulation Enforcement. Marine particles continues to be an ongoing downside in these delicate environmental areas, and NOAA’s Marine Particles Program has helped present funding to take away particles within the Florida Keys.

What’s an ocean glider?

VIDEO: What’s an ocean glider? This is an outline in below two minutes. Transcript

Scientists at the moment are experimenting with utilizing gliders to find populations of spawning fish. The glider illustrated right here is outfitted with an acoustic receiver to “pay attention” for vocalizations—grunting sounds—made by some fish as they mass collectively to spawn within the U.S. Caribbean. The car information the geolocation of the sounds that it “hears” onto an onboard reminiscence card. Study extra.

Do you know?

In 2009, a glider named the “Scarlet Knight” made historical past by crossing the Atlantic Ocean from New Jersey to Spain. Study extra.

An ocean glider is an autonomous, unmanned underwater car used for ocean science. Since gliders require little or no human help whereas touring, these little robots are uniquely suited to gathering information in distant areas, safely and at comparatively low price.

Gliders could also be geared up with all kinds of sensors to observe temperature, salinity, currents, and different ocean situations. This data creates a extra full image of what’s occurring within the ocean, in addition to tendencies scientists won’t in any other case be capable to detect from satellites or giant analysis ships.

Whereas there are various glider designs that use completely different strategies to maneuver via the water, all gliders share the power to journey far distances over lengthy intervals, with out servicing. Unmanned gliders pattern the ocean in locations the place it’s impractical to ship individuals, and at a fraction of the price, permitting us to gather information even in the course of a hurricane. It’s these traits together with developments in sensor applied sciences that make gliders more and more essential as instruments for gathering ocean information.

The glider illustrated on this animation is the Slocum glider. It could seem like a torpedo, however it doesn’t have propellors or an inner engine. As an alternative, it makes use of a pump to softly change its buoyancy over time. This permits the glider to slowly transfer up and down via the water. And because it does so, the massive fins protruding of the edges of the craft create carry to propel it ahead. It’s just like how a glider within the air works, besides the ocean glider can glide up as simply because it glides down.

Video Transcript

An ocean glider is autonomous: it travels via the ocean with out human assist. It’s pre-programmed with journey waypoints after which let out to gather ocean information for days, weeks, or months. Totally different sensors mounted on the glider accumulate completely different sorts of knowledge. This glider is fitted with an acoustic sensor to pay attention for and report noises made by fish throughout spawning season. After gathering information for a set time period, the glider completes its journey. The glider then surfaces and transmits its place so individuals can come choose it up. Mission full!

What’s a Excessive Seas Forecast?

map of high seas forecast areas

NOAA’s Excessive Seas Forecasts are marine climate forecasts ready for mariners and transmitted world wide in real- and near-real-time. Word: the above map i

Seafaring could be very harmful for ships at sea. For hundreds of years, little may very well be executed to make transport safer, as a result of unpredictability of the climate, the huge measurement of the ocean, and an absence of worldwide cooperation within the open ocean. Nevertheless, the 1912 sinking of the “unsinkable” Titanic, with greater than 1,500 casualties, sparked world concern about security and requirements for ships at sea. This tragedy would result in new worldwide conventions that established security necessities and offered extra correct and standardized climate forecasts.

As we speak, Nationwide Meteorological and Hydrological Companies world wide present real- or near-real-time climate forecasts and information which can be transmitted globally. The World Meteorological Group’s (WMO) International Observing System depends on member international locations, which use their services on land, at sea, and in area through satellites to forecast climate situations. Collectively, these assets enable meteorological and different environmental observations on a world scale.

As a member of WMO, NOAA’s Nationwide Climate Service (NWS) gives Excessive Seas Forecasts for giant areas of the U.S. Atlantic and Pacific oceans. The NWS additionally gives marine forecasts for U.S. coastal areas and the Nice Lakes, offshore waters, and a part of the Arctic Ocean. The NWS’s Unified Floor Evaluation of world climate additionally gives information on a posh set of floor observations. These forecasts from NOAA, in addition to predictions from different Nationwide Meteorological and Hydrological Companies world wide, can be found to anybody, and, most significantly, to all ships at sea.

How does overfishing have an effect on coral reefs?


Coral reef ecosystems assist essential industrial, leisure, and subsistence fishery sources within the U.S and its territories. Fishing additionally performs a central social and cultural position in lots of island and coastal communities, the place it’s typically a crucial supply of meals and revenue.

The impacts from unsustainable fishing on coral reef areas can result in the depletion of key reef species in lots of areas. Such losses typically have a ripple impact, not simply on the coral reef ecosystems themselves, but additionally on the native economies that depend upon them. Moreover, sure sorts of fishing gear can inflict critical bodily injury to coral reefs, seagrass beds, and different essential marine habitats.

Coral reef fisheries, although typically comparatively small in scale, could have disproportionately massive impacts on the ecosystem if carried out unsustainably. Fast human inhabitants development, elevated demand, use of extra environment friendly fishery applied sciences, and insufficient administration and enforcement have led to the depletion of key reef species and habitat injury in lots of areas.

Infographic Textual content

Threats to coral reefs: Overfishing

Coral reef fish are a major meals supply for over billion individuals worldwide. Many coastal and island communities depend upon coral reef fisheries for his or her financial, social, and tradition advantages. However an excessive amount of of a very good factor may be unhealthy for coral reefs.

  • Fishing Nurseries

    Nearshore habitats function nurseries for a lot of fish. Catching younger fish in nets removes them earlier than they can assist replenish the inhabitants.

  • Marine Particles

    Traps set too near reefs and marine particles, reminiscent of ghost traps misplaced nets, monofilament, and contours can injury coral reefs, which take a very long time to get well.

  • Indiscriminate Fishing

    Use of non-selective gears, like nets and traps, typically removes extra herbivorous fishes. These fish eat algae and assist preserve the ecosystem in steadiness.

  • Fishing Spawning Aggregations

    Some species collect in massive numbers at predictable occasions and areas to mate. Spawning aggregations are significantly susceptible to overfishing.

  • Fishing Too Many Large Fish

    Giant fish produce extra younger which are more likely to survive to maturity. Their absence means fish populations dwindle over time.

How one can assist

  • Educate your self on native fishing guidelines and laws. Your state fishery company or bait and sort out store can assist you study extra.
  • Make sustainable seafood selection. Be taught extra: www.fishwatch.gov
  • Solely take what you want. Catch and launch fish that you do not plan to eat.
  • Be a accountable aguarium proprietor. Know the place your fish come from and DO NOT launch undesirable fish into the wild.

Can a coral reef get well from bleaching and different nerve-racking occasions?

​Coral reef​s ​​​​in the clear blue waters of Kure Atoll in ​Hawaii's Papahānaumokuākea Marine National Monument​

​Coral reef​s ​​​​within the clear blue waters of Kure Atoll in ​Hawaii’s Papahānaumokuākea Marine Nationwide Monument​.


Local weather change and ocean acidification may end up in mass coral bleaching occasions, elevated susceptibility to illness, slower progress and reproductive charges, and degraded reef construction.

There are not any fast fixes on the subject of a altering local weather. In the long run, coral reefs world wide will profit probably the most from the discount of greenhouse gases. Within the brief time period, we are able to enhance coral reef resilience by addressing native stressors, like runoff from land-based sources of air pollution and overharvesting of fish.

NOAA’s Coral Reef Conservation Program helps native managers and communities just do that. The thought is straightforward. We all know local weather change is the only best international menace to coral reefs. Selling reef resilience is a neighborhood resolution. A resilient coral reef is one that may both resist a large-scale nerve-racking occasion or get well from it. For this to occur, native threats should be saved to a minimal to cut back stress and enhance total reef situation. Scientists are additionally honing methods to judge how resilient a coral reef ecosystem is in order that managers can take focused actions which have the best influence.

Wholesome coral reefs help an incredible variety of marine life and are sometimes known as the rainforests of the ocean. Coral reefs present many advantages to folks, together with coastal safety, meals, jobs, medication, and leisure actions.

What’s coral spawning?


To view this video please allow JavaScript, and contemplate upgrading to an online browser that
helps HTML5 video

Corals are a good looking and necessary a part of our ocean. However they can not transfer across the ocean ground. So, how, precisely, do they discover mates? See the weird and delightful phenomenon of coral spawning on this Ocean At this time video.


Annually, on cues from the lunar cycle and the water temperature, complete colonies of coral reefs concurrently launch their tiny eggs and sperm, referred to as gametes, into the ocean. The phenomenon brings to thoughts an underwater blizzard with billions of colourful flakes cascading in white, yellow, pink, and orange.

In ways in which scientists nonetheless don’t totally perceive, mature corals launch their gametes all on the similar time. This synchrony is essential, as a result of the gametes of most coral species are viable for just a few hours. The “blizzard” makes it extra probably that fertilization will happen.
 

The gametes, stuffed with fatty substances referred to as lipids, rise slowly to the ocean floor, the place the method of fertilization begins.

When a coral egg and sperm be part of collectively as an embryo, they develop right into a coral larva, referred to as a planula. Planulae float within the ocean, some for days and a few for weeks, earlier than dropping to the ocean ground. Then, relying on seafloor circumstances, the planulae could connect to the substrate and develop into a brand new coral colony on the sluggish charge of about .4 inches a yr.

What’s a present survey?

Do you know?

An Operational Forecast System offers a nowcast and forecast (as much as 48 hours) of water ranges, currents, salinity, water temperatures, and winds for a given space. These methods are positioned in coastal waters and the Nice Lakes in important ports, harbors, and estuaries.

NOAA’s Heart for Operational Oceanographic Merchandise and Companies offers tidal present predictions to business and leisure mariners who depend on this data for protected navigation.  With the intention to present probably the most correct predictions attainable, NOAA should periodically resurvey numerous coastal and estuarine areas.  Survey areas are chosen based mostly on mariners’ navigation wants, oceanographic analyses, and the period of time that has handed because the final survey. Given trendy enhancements in measurement and computing know-how, these surveys vastly enhance the accuracy of tidal predictions. In 2017, for instance, NOAA concluded a three-year present survey of Puget Sound, Washington, to replace the area’s tidal present predictions. Previous to the survey, predictions had been based mostly on restricted quantities of information collected within the Nineteen Thirties-Nineteen Sixties.

To gather the info they want, NOAA scientists usually deploy Acoustic Doppler Present Profilers (ADCPs) to measure currents all through the water column at numerous areas for a interval of 1 to 4 months. The observations collected from the ADCPs are used to generate tidal present predictions at these areas.  Along with present measurements, NOAA typically deploys salinity, temperature, oxygen, and stress sensors at choose areas to trace the motion of assorted water lots. Whereas the mixed information is used to create higher tidal prediction fashions, additionally it is used to help the creation of NOAA Operational Forecast System (OFS) hydrodynamic fashions.  These fashions present short-term forecasts of water ranges, currents, water temperature, and salinity in coastal areas. 

Infographic Transcript: Coastal & Estuarine Present Surveys

Instrument Deployments: Annually NOAA measures ocean currents at completely different coastal and estuarine areas by deploying dozens of short-term devices.

Currents: Ocean currents describe the motion of water from one location to a different. Currents are noticed at depths all through the water column and are measured over a interval from one to 4 months.

Acoustic Doppler Present Profiler (ADCP): This instrument measures the currents by emitting beams of sound, which mirror off of particles within the water and again to the ADCP.

Harmonic Evaluation: After the ocean present measurements are collected, oceanographers obtain
the info after which analyze it via a pc program. A statistical course of
known as harmonic evaluation determines the half of the present attributable to the tides.
This “tidal present” can then be predicted at that location for a few years into the
future. Different components that affect the present, resembling wind, can’t be forecast for
various days and aren’t included within the prediction.

Tidal Present Predictions: Within the graph above, NOAA predicts at “Lovely Bay” that the tidal present will flood (stream inland) at 1 pm, slack (low present pace) at 4 pm, and ebb (stream out to sea) at 7 pm. The quickest currents seem at peak flood and ebb.

How are present predictions used? Because of NOAA tidal present predictions, kayakers trying to depart “Lovely Bay” know to keep away from the time of peak flood at 1pm after they could be paddling
towards the present. Tidal present predictions present important data for each
leisure and business marine navigation. Predictions of the tidal present might be
accessed on-line for 1000’s of coastal and estuarine areas.

 

How do hurricanes have an effect on sea life?

A sunken vessel in Vieques, Puerto Rico

A sunken vessel amongst a coral colony in Vieques, Puerto Rico, on Oct. 23, 2017. Following Hurricane Maria in 2017, NOAA and companions eliminated a complete of 479 displaced vessels and three,668 hazardous chemical containers. Groups additionally relocated roughly 400 coral colonies.

When a storm churns throughout the ocean, the nice and cozy floor waters present further moisture and
can gasoline the storm right into a hurricane. Because the hurricane grows bigger and stronger, it may possibly
generate waves as excessive as 18.3 meters (60 ft), tossing and mixing hotter floor waters with the colder,
saltier water under. The ensuing currents can lengthen so far as 91.5 meters (300 ft) under the
floor, wreaking lethal havoc on marine life.

If the wild currents fail to interrupt up coral reefs of their path, the rain-infused water they bring about
reduces salt ranges and in any other case stresses corals. Because the hurricane strikes towards shore, the
underwater tumult could cause shifting sands and muddy shallow waters, blocking the important
daylight on which corals and different sea creatures rely.

Gradual-moving fish and turtles and shellfish beds are sometimes decimated by the tough undercurrents
and fast modifications in water temperature and salinity wrought by a hurricane. Sharks, whales, and
different massive animals swiftly transfer to calmer waters, nevertheless, and, usually talking, usually are not
overly affected by hurricanes.

Can we clear up, cease, or finish dangerous algal blooms?

A harmful algal bloom outbreak on Lake Erie viewed from space

Imagery of the Western Lake Erie dangerous algal bloom from September 26, 2017. The scum proven right here close to downtown Toledo stretched all the best way to Lake Ontario. This picture is from Landsat-8 (a NASA/USGS satellite tv for pc).

Dangerous algal blooms — also known as HABs for brief — happen when algae produce poisonous or dangerous results on individuals, fish, shellfish, marine mammals, birds, or different aquatic organisms. Blooms happen in marine and freshwater environments all through the world, with damaging ecological, social, and financial results.
So why can’t we clear up the algae and maintain this downside? Sadly, the reply just isn’t so easy. Dangerous algal blooms are a pure course of. There are data of HABs from early European colonists arriving to Florida within the 1500s. Nonetheless, analysis factors to a rise within the frequency and depth of algal blooms in fashionable instances as a consequence of environmental modifications brought on by people.

There are lots of examples of human actions that contribute to HABs: runoff from agriculture, dissolved chemical compounds launched into water provides through rainfall or irrigation, and effluent from sewage therapy vegetation all contribute to extra quantities of vitamins in our waterways. These vitamins are meals for algae. In housing developments, for instance, retention ponds are a typical place to see freshwater HABs. All this runoff results in the water system, ultimately making its solution to the ocean.

Certainly one of main missions of NOAA’s Nationwide Facilities for Coastal Ocean Science is to empower communities to take motion on HAB points by creating detection instruments and forecasts. NCCOS is concerned in mitigating dangerous algal blooms in quite a few alternative ways and thru a number of legislative measures. For instance, the Dangerous Algal Bloom Hypoxia Analysis and Management Act offers NOAA with a authorized mandate to check HABS, to mitigate their results, and to supply early warning for when and the place blooms will happen. NOAA companions with different organizations all through the nation, as nicely, to assist analysis by way of three funding alternatives:

  1. The Ecology and Oceanography of Dangerous Algal Blooms program offers funding for universities and different teams to take a look at the ecology and oceanography of HABS.

  2. The Monitoring of and Occasion Response to Dangerous Algal Blooms program focuses on a sensible method to strategies for testing applied sciences to detect toxins within the cells of the algae and characterize their abundance.

  3. The Prevention, Management and Mitigation of Dangerous Algal Blooms program focuses on what could be carried out to forestall individuals from coming into contact with HAB impacts, to raised inform the general public and to supply extra directed early warning merchandise for dangerous algal blooms.

Dangerous algal bloom assets, incessantly requested questions, and regional data can be found through the Nationwide Ocean Service HAB portal.