The reason it is in grave danger is that it has an exceptionally limited distribution range—it is only found in three estuaries (河口) in the whole of South Africa. Unless these estuaries are conserved, South Africa will lose its only seahorse species for ever.请根据篇章内容完成摘要。每空...
What is shelling? It’s looking for buried treasure on the seashore. Shelling is a popular pastime on Sanibel Island, and it’s easy to see why: The island’s unique geography makes finding and collecting these buried treasures easy and especially fun....
Whales and dolphins live and feed in almost every part of themarine environ- mentincluding the great rivers and their estuaries (Platanistidae), continen- tal shelves (Mysticeti, Phocoenidae), deep ocean canyons (Physetertdae, Ziphiidae), tropical oceans (Delphinidae), and even amidst ice in...
While massive and catastrophic spills receive the most attention, smaller and chronic ones occur regularly. These spills contaminate the coasts and estuaries and can cause serious health problems to human beings, not to mention the removal costs. Oil is a mixture of hydrocarbon compounds, the decaye...
they can get their claws on, clams being a favourite. Keji Seaside has 2 estuaries. Both were chock full of green crabs. Their appetite left the estuaries as a “moonscape”, meaning there is essentially no life. The researchers and Parks Canada decided to try and find a solution. They ...
Living oyster reefs, in contrast, dissipate wave energy. And unlike seawalls, theirgrowth can outpace sea level rise. Oyster reefs' role asnatural breakwaterscould be particularly helpful in estuaries where high boat traffic intensifies shoreline erosion, such as Sydney Harbour. ...
Valiella I, McClelland J, Hauxwell J, Behr PJ, Hersh D, Foreman K (1997) Macroalgal blooms in shallow estuaries: controls and ecophysiological and ecosystem consequences. Limnol Oceanogr 42:1105–1118 Vargas CA, Madin LP (2004) Zooplankton feeding ecology: clearance and ingestion rates of the...
Overfishing and pollution have threatened oceans to face ecological disaster. Industrial pollutants that are dumped upstream of estuaries have rendered many marine habitats unsuitable for life. We need to gain knowledge for a better understanding of how to preserve the Earth’s natural biomes. By educ...
Tides have little effect in the open ocean and in lakes, so tables mainly are generated for coastal areas, inlets, bays and estuaries. Not surprisingly, boats rely heavily on tidal information. Traveling through shallow ports and narrow intracoastal waterways or under bridges is a risky venture ...
Gathering and analysing information on water quality is an essential part of making sure lakes, rivers, oceans, estuaries and other bodies of water are safe and sanitary. Chemical condition is of key importance, with specialists focussing on the presence of oxygen, nutrients, oils, pesticides and...