Sentences with phrase «altering fish habitat»

Not exact matches

When these changes take effect, on a date which has yet to be announced, the prohibition on altering a fish's habitat will be replaced with a prohibition on causing «serious harm to fish that are part of a commercial, recreational or Aboriginal fishery, or to fish that support such a fishery.»

The two major dams, the Hoover Dam near Las Vegas and the Glen Canyon Dam below Lake Powell in Utah, have had major effects on wildlife and fish in the Colorado River, altering their natural ecosystems, drowning their habitat, and changing the temperatures of the waters in which they evolved.

Dams can prevent or impede fish passage and degrade the habitats upstream by inundating formerly free - flowing rivers, reducing water quality, and altering fish communities.

Ocean acidification alters behavioural responses to physical and chemical cues in marine animals, including the maladaptive deterrence of settlement - stage larval fish to odours of preferred habitat and attraction to odours of non-preferred habitat.

This once - prized ornamental aquarium fish from the Pacific Ocean has found its way into the Caribbean from cumulative releases into the wild reducing Atlantic biodiversity and adversely altering habitat.

Increased abundances of invasive species: As climate change alters water temperatures, habitat, and fish communities, conditions that once were barriers to alien species become conduits for establishment and spread.91 This migration will alter drastically the fish communities of the Great Lakes basin.

Altered fish communities: Warmer lakes and streams will certainly provide more habitat for warmwater species as conditions in northern reaches of the basin become more suitable for warmwater fish and as lakes and streams are vacated by cool - and coldwater species.91 Habitat for coldwater fish, though not expected to disappear, will shrink substantially, though it could also expand in some areas, such as Lake Superior.

Scientists also expect sea - level rise to alter coastal ecosystems such as the salt marshes and estuaries of Long Island, threatening feeding grounds for migrating waterfowl and nursery habitat for commercial fish.19

The loss of sea ice changes ecosystems, opening the door to invasive species, and alters habitat and plankton blooms, affecting Alaska's commercial fishing industry, which leads the United States in the value of its catch.