Sea life color codes food to evade danger
<p><span word="The">The</span> <span word="ocean">ocean</span> <span word="glows">glows</span> <span word="with">with</span> <span word="undersea">undersea</span> <span word="life">life</span> <span word="which">which</span> <span word="makes">makes</span> <span word="its">its</span> <span word="own">own</span> <span word="light">light</span>.</p><p><span word="These">These</span> <span word="animals">animals</span> <span word="living">living</span> <span word="on">on</span> <span word="the">the</span> <span word="ocean">ocean</span> <span word="floor">floor</span>, <span word="beyond">beyond</span> <span word="the">the</span> <span word="reach">reach</span> <span word="of">of</span> <span word="sunlight">sunlight</span>, <span word="have">have</span> <span word="evolved">evolved</span> <span word="this">this</span> <span word="bioluminescence">bioluminescence</span> <span word="for">for</span> <span word="camouflage">camouflage</span>, <span word="to">to</span> <span word="find">find</span> <span word="mates">mates</span> <span word="or">or</span> <span word="to">to</span> <span word="repel">repel</span> <span word="or">or</span> <span word="confuse">confuse</span> <span word="predators">predators</span>.</p><p><span word="They">They</span> <span word="also">also</span> <span word="have">have</span> <span word="a">a</span> <span word="sort">sort</span> <span word="of">of</span> <span word="color">color</span> <span word="vision">vision</span> <span word="which">which</span> <span word="combines">combines</span> <span word="sensitivity">sensitivity</span> <span word="to">to</span> <span word="blue">blue</span> <span word="and">and</span> <span word="ultraviolet">ultraviolet</span> <span word="light">light</span>. <span word="Their">Their</span> <span word="detection">detection</span> <span word="of">of</span> <span word="these">these</span> <span word="shorter">shorter</span> <span word="wavelengths">wavelengths</span> <span word="may">may</span> <span word="provide">provide</span> <span word="them">them</span> <span word="a">a</span> <span word="way">way</span> <span word="to">to</span> <span word="ensure">ensure</span> <span word="they">they</span> <span word="grab">grab</span> <span word="food">food</span>, <span word="not">not</span> <span word="poison">poison</span>.</p><p><span word="Two">Two</span> <span word="new">new</span> <span word="studies">studies</span> <span word="published">published</span> <span word="this">this</span> <span word="week">week</span> <span word="in">in</span> <span word="Experimental">Experimental</span> <span word="Biology">Biology</span> <span word="illuminate">illuminate</span> <span word="the">the</span> <span word="scene">scene</span> <span word="on">on</span> <span word="the">the</span> <span word="sea">sea</span> <span word="floor">floor</span>.</p><p><span word="Duke">Duke</span> <span word="University">University</span> <span word="biologist">biologist</span> <span word="Sonke">Sonke</span> <span word="Johnsen">Johnsen</span> <span word="was">was</span> <span word="among">among</span> <span word="a">a</span> <span word="crew">crew</span> <span word="of">of</span> <span word="scientists">scientists</span> <span word="on">on</span> <span word="a">a</span> <span word="submersible">submersible</span> <span word="vehicle">vehicle</span> <span word="that">that</span> <span word="explored">explored</span> <span word="the">the</span> <span word="ocean">ocean</span> <span word="bottom">bottom</span> <span word="at">at</span> <span word="three">three</span> <span word="sites">sites</span> <span word="near">near</span> <span word="the">the</span> <span word="Bahamas">Bahamas</span>.</p><p>“<span word="Our">Our</span> <span word="original">original</span> <span word="guess">guess</span> <span word="was">was</span> <span word="that">that</span> <span word="actually">actually</span> <span word="the">the</span> <span word="whole">whole</span> <span word="sea">sea</span> <span word="floor">floor</span> <span word="might">might</span> <span word="have">have</span> <span word="a">a</span> <span word="dim">dim</span> <span word="glow">glow</span> <span word="from">from</span> <span word="bacteria">bacteria</span>," <span word="Johnsen">Johnsen</span> <span word="says">says</span>. "<span word="There">There</span> <span word="are">are</span> <span word="a">a</span> <span word="number">number</span> <span word="of">of</span> <span word="bacteria">bacteria</span> <span word="that">that</span> <span word="glow">glow</span> <span word="continually">continually</span> <span word="as">as</span> <span word="they">they</span> <span word="are">are</span> <span word="breaking">breaking</span> <span word="down">down</span> <span word="dead">dead</span> <span word="animals">animals</span> <span word="and">and</span> <span word="things">things</span> <span word="of">of</span> <span word="that">that</span> <span word="sort">sort</span>.”</p><p><span word="But">But</span> <span word="that">that</span> <span word="wasn">wasn</span>’<span word="t">t</span> <span word="the">the</span> <span word="case">case</span>. <span word="Using">Using</span> <span word="the">the</span> <span word="vehicle">vehicle</span>’<span word="s">s</span> <span word="robotic">robotic</span> <span word="arm">arm</span>, <span word="they">they</span> <span word="gently">gently</span> <span word="tapped">tapped</span> <span word="the">the</span> <span word="coral">coral</span>, <span word="crabs">crabs</span> <span word="and">and</span> <span word="anything">anything</span> <span word="else">else</span> <span word="that">that</span> <span word="moved">moved</span> <span word="to">to</span> <span word="see">see</span> <span word="which">which</span> <span word="seabed">seabed</span> <span word="creatures">creatures</span> <span word="emitted">emitted</span> <span word="light">light</span>.</p><p><span word="Only">Only</span> 20 <span word="percent">percent</span> <span word="did">did</span>, <span word="compared">compared</span> <span word="to">to</span> 90 <span word="percent">percent</span> <span word="of">of</span> <span word="the">the</span> <span word="species">species</span> <span word="that">that</span> <span word="populate">populate</span> <span word="the">the</span> <span word="open">open</span> <span word="ocean">ocean</span> <span word="higher">higher</span> <span word="in">in</span> <span word="the">the</span> <span word="water">water</span> <span word="column">column</span>.</p><p><span word="Johnsen">Johnsen</span>, <span word="who">who</span> <span word="led">led</span> <span word="the">the</span> <span word="bioluminescence">bioluminescence</span> <span word="study">study</span>, <span word="says">says</span> <span word="the">the</span> <span word="plankton">plankton</span> <span word="produced">produced</span> <span word="a">a</span> <span word="different">different</span> <span word="color">color</span> <span word="from">from</span> <span word="the">the</span> <span word="animals">animals</span> <span word="that">that</span> <span word="ate">ate</span> <span word="them">them</span>.</p><p>“<span word="It">It</span> <span word="is">is</span> <span word="very">very</span>, <span word="very">very</span> <span word="blue">blue</span>. <span word="It">It</span>’<span word="s">s</span> <span word="like">like</span> <span word="a">a</span> <span word="blue">blue</span> <span word="LED">LED</span>. <span word="It">It</span>’<span word="s">s</span> <span word="just">just</span> <span word="this">this</span> <span word="beautiful">beautiful</span>, <span word="beautiful">beautiful</span> <span word="pure">pure</span> <span word="blue">blue</span>. <span word="Much">Much</span> <span word="of">of</span> <span word="the">the</span> <span word="light">light</span> <span word="from">from</span> <span word="the">the</span> <span word="animals">animals</span> <span word="on">on</span> <span word="the">the</span> <span word="sea">sea</span> <span word="floor">floor</span> <span word="was">was</span> <span word="green">green</span>, <span word="or">or</span> <span word="at">at</span> <span word="least">least</span> <span word="greener">greener</span>, <span word="and">and</span> <span word="so">so</span> <span word="you">you</span> <span word="end">end</span> <span word="up">up</span> <span word="with">with</span> <span word="this">this</span> <span word="world">world</span> <span word="where">where</span> <span word="you">you</span> <span word="have">have</span> <span word="little">little</span> <span word="blue">blue</span> <span word="flashes">flashes</span> <span word="of">of</span> <span word="light">light</span> <span word="in">in</span> <span word="the">the</span> <span word="water">water</span> <span word="and">and</span> <span word="then">then</span> <span word="green">green</span> <span word="light">light</span> <span word="whenever">whenever</span> <span word="anything">anything</span> <span word="is">is</span> <span word="touched">touched</span> <span word="on">on</span> <span word="the">the</span> <span word="bottom">bottom</span>.”</p>
页:
[1]