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UCLA Life Scientists’ Study of Abalone Yields New Insights into Sexual Reproduction

By Guest PostAugust 15, 2011Sciencechemistry and biology of reproduction, contact between sperm and egg, effective communication system, environmental conditions, female abalone eggs, fluid dynamics, jeffrey riffell, mammalian reproductive tract, massachusetts institute of technology, molecule, natural habitat of the abalone, ocean crevices, ocean dwelling snail, point loma, red abalone, richard zimmer, roman stocker, san diego, sexual reproduction, sperm and eggs, target area, techniques to improve fertilization in humans, tryptophan, ucla, university of washington

*Research could lead to techniques to improve fertilization in humans*

In new research that could have implications for improving fertilization in humans and other mammals, life scientists studied interactions between individual sperm and eggs in red abalone, an ocean-dwelling snail, and made precise chemical measurements and physical models of these interactions. They are the first scientists to do so.

By simulating the natural habitat of the abalone in the laboratory, the scientists were able to determine the conditions under which sperm–egg encounters and fertilization were most likely to occur. (more…)

US West Coast Erosion Spiked In Winter 2009-10, Previewing Likely Future As Climate Changes

By Guest PostJuly 13, 2011Environmentamerican geophysical union, california, climate change scenarios, climatic pattern, el niño, el nino modoki, equatorial pacific, global warming, ocean beach, oregon state university, pacific coast, pacific northwest, patrick barnard, san diego, san francisco, scripps institution of oceanography, us west coast, willapa bay

SANTA CRUZ, Calif. – Knowing that the U.S. west coast was battered during the winter before last by a climatic pattern expected more often in the future, scientists have now pieced together a San Diego-to-Seattle assessment of the damage wrought by that winter’s extreme waves and higher-than-usual water levels. Getting a better understanding of how the 2009-10 conditions tore away and reshaped shorelines will help coastal experts better predict future changes that may be in store for the Pacific coast, the researchers say.

“The stormy conditions of the 2009-10 El Niño winter eroded the beaches to often unprecedented levels at sites throughout California and vulnerable sites in the Pacific Northwest,” said Patrick Barnard, USGS coastal geologist. In California, for example, winter wave energy was 20 percent above average for the years dating back to 1997, resulting in shoreline erosion that exceeded the average by 36 percent, he and his colleagues found. (more…)

Think Globally, but Act Locally When Studying Plants, Animals, Global Warming, Researchers Advise

By Guest PostMarch 22, 2011Environment, Natureagriculture, air pollution, butterfly, camille parmesan, climate, climate change, climate change impacts, effects of climate change, extinctions, global scale, global warming, greenhouse gas, habitat fragmentation, human activities, invasive species, los angeles, mediterranean geraniums, michael singer, multiple factors, natural changes, nobel prize, plants and animals, policy makers, quino checkerspot butterfly, san diego, southern california, species, united states, urban sprawl

AUSTIN, Texas — Global warming is clearly affecting plants and animals, but we should not try to tease apart the specific contribution of greenhouse gas driven climate change to extinctions or declines of species at local scales, biologists from The University of Texas at Austin advise.

Camille Parmesan, Michael C. Singer and their coauthors published their commentary online this week in Nature Climate Change.

“Yes, global warming is happening. Yes, it is caused by human activities. And yes, we’ve clearly shown that species are impacted by global warming on a global scale,” says Parmesan, associate professor of integrative biology. (more…)

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UCLA Life Scientists’ Study of Abalone Yields New Insights into Sexual Reproduction

US West Coast Erosion Spiked In Winter 2009-10, Previewing Likely Future As Climate Changes

Think Globally, but Act Locally When Studying Plants, Animals, Global Warming, Researchers Advise