Sentences with phrase «seabirds feeding»

At Pelican Rocks, snorkelers are joined by diving seabirds feeding on small fish.

By using isotopic tracers called stable isotopes, researchers showed that seabirds feeding in areas rich in sulfate (a chemical that is an important food for sulfate - reducing bacteria that help break down organic matter) had high levels of mercury.

Not exact matches

The growing abundance of these jelly - feeding gobies now serves to provide sustenance to the predators that formerly feasted on the sardines, such as seabirds, larger fishes and, ultimately, humans.

This might appear to be good news, but it is due to a decline in fish stocks near the surface which has forced seabirds to feed in areas where there are more bacteria (known as sulfate - reducing bacteria) which control the levels of mercury.

They include kelp flies, which feast on decaying algae, and other insects which feed on washed - up carcasses of fish, marine mammals and seabirds.

The litter floating in the Arctic is particularly detrimental to seabirds, which feed at the sea surface.

Pellets are often found in the stomach content of seabirds like fulmars, which feed from the surface of the sea.

The team also gathered data on seabird and fish populations that feed in the sea and then come onto land — like ocean - going salmon that move up rivers to defecate, spawn, and die.

Feeding conditions have improved for California sea lions and seabirds that experienced mass die - offs caused by shifts in their prey during the Blob.

This, the researchers say, is consistent with recent studies into the feeding behaviour of seabirds and suggests marine life might be increasingly attracted to marine debris as a source of food regardless of the potential harm caused.

They feed on the bottom of the food chain — on single - celled plankton, which larger fish can not eat — and then they become prey for all sorts of upper - level predators like tuna, sea bass and halibut as well as seabirds and marine mammals.

These small crustaceans are important organisms of the zooplankton, particularly as food for baleen whales, Mantas, whale sharks, Crabeater seals and other seals, and a few seabird species that feed almost exclusively on them.

Krill is central to the ecosystem around South Georgia, feeding numerous colonies of marine mammals, seabirds and penguins, as well as sustaining plentiful fisheries within South Georgia waters.

Possible over-fishing of tuna could be an indirect threat, as predatory fish herd shoals of small fish to the surface where they become available to surface - feeding seabirds (Ratcliffe 1999).

Seabirds number in the thousands as they congregate to feed on the abundant fish population.

For example, bald eagles were once the top marine aerial predator and probably fed upon a variety of seabirds and fish.

The Channel Islands provide essential nesting and feeding grounds for approximately 99 percent of seabirds that nest in southern California.

The National Park Service began poisoning black rats last year to prevent the rodents from feeding on the eggs of endangered seabirds.

It provides breeding and feeding grounds for at least twenty - five endangered or threatened species; thirty - six marine mammal species, including blue, gray, and humpback whales, harbor seals, elephant seals, Pacific white - sided dolphins, and one of the southernmost U.S. populations of threatened Steller sea lions; over a quarter - million breeding seabirds; and one of the most significant white shark populations on the planet.

These areas support tundra vegetation consisting of mosses, lichens, and algae, while seabirds, penguins, and seals feed in the surrounding waters.

From afar we observe seabirds that also feed on sardines and inform us that goes beyond food and therefore also sailfish.

Almost all life in the Southern Ocean is ultimately dependent on the protein - rich crustaceans, from seabirds, seals and penguins, to the filter feeding whales.

From the seas of north Wales, where he kayaks among feeding frenzies of dolphins and seabirds, to the forests of Eastern Europe, where lynx stalk and packs of wolves roam, George Monbiot shows how rewilding could repair the living planet, creating ecosystems in post-industrial nations as profuse and captivating as any around the world.

The study included seabirds, seals and polar bears in the assessment as they live in a marine environment and feed mostly on sealife.

Papahānaumokuākea is a vital feeding, nesting, and nursery habitat for many other species, including seabirds, sea turtles and cetaceans.