謎のキノコサークルの正体とは?

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  • ナミビアのナミブランド自然保護区で見つかったキノコサークルの正体について、研究者が解明に迫っています。
  • キノコサークルの形成は、欠乏している栄養分や農薬などではなく、ナミビアの自然環境によって引き起こされていることが判明しました。
  • キノコサークルは約24〜75年の周期で発生・消滅しており、その寿命の平均は41年であることがわかりました。
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和訳していただけませんか?

下の文を和訳していただけませんか? Tschinkel first encountered fairy circles in 2005 on a vacation to the NamibRand Nature Reserve, a private nature park dedicated to conserving the local ecology and wildlife in southwestern Namibia, where his local guide introduced him to the strange land forms. “I looked at them and said, ‘Obviously, they’re caused by termites,’ ” he recalls. Perhaps the insects were killing the grass from below, or maybe they were giving off gases that were poisoning the vegetation. But when he and his wife returned to the region in 2007 and excavated a handful of fairy circles, they found no evidence of termites. Other experiments ― adding essential nutrients such as zinc to the fairy circles or replacing the soil inside the circles with the soil from outside the circles ― didn’t cause the vegetation to grow back, suggesting the formations are not the result of a lack of nutrients.So Tschinkel turned to satellite images. By comparing photos taken over a 4-year period, he confirmed something other scientists had suspected: The circles were alive ― or at least they were dynamic. A number of circles appeared and disappeared over this time period. Extrapolating from the data, Tschinkel calculated that most smaller circles arise and vanish every 24 years, whereas larger circles last up to 75 years. Overall, the lifespan averaged 41 years.

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回答No.1

チンクルは、休暇でナミビランド自然保護区に行った2005年に、初めてフェアリー・サークルに出会いました。ナミビランド自然保護区は、南西ナミビアの地元の生態環境や野生生物を保護するために献納された個人の自然公園ですが、そこで、彼の地元のガイドが彼に奇妙な土地の形態を紹介したのでした。「私はそれらを見て、『明らかに、それらはシロアリに起因します』」と言ったことを、彼は思い出します。 おそらく、その昆虫(シロアリ)が下から草を枯らしたか、あるいは、多分、それら(シロアリ)が植物に有害なガスを放っていたのでしょう。しかし、彼と彼の妻が2007年にその地域に戻って、少数のフェアリー・サークルを掘り返したとき、彼らはシロアリの証拠を見つけませんでした。亜鉛のような重要な栄養分をフェアリー・サークルに加えたり、サークル(円)の内側の土をサークルの外側から持ってきた土と入れ替える ― と言った、他の実験も、植物が再び成長する原因にはなりませんでした。このことは、その形態が栄養分の欠乏の結果でないことを示唆しました。それで、チンクルは衛星画像を調べました。 4年の期間に撮られた写真を比較することによって、彼は、他の科学者が疑ったことを確認しました: サークルは生きていました ― あるいは、少なくとも、それらは動的でした。この期間に、いくつかのサークルが現れて、消えました。 データから推定して、チンクルは、ほとんどの小さめのサークルが、24年おきに生じたり、消えたりしてること、ところが、より大きなサークルは最高75年続くことを算出しました。全体として、寿命は平均で41年でした。

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