ריף השונית הגדול של אוסטרליה הוא אחד מפלאי תבל הטבעיים של העולם, ואחת האקולוגיות הייחודיות בכדור…

עידן לוי | 13 באפריל 2021 | מחשבות | 7 דק׳

משפט הקופים המודרני

ריף השונית הגדול של אוסטרליה הוא אחד מפלאי תבל הטבעיים של העולם, ואחת האקולוגיות הייחודיות בכדור הארץ. 3,000 מבנים מאובנים אדירי ממדים, חלקם בגובה של מאות מטרים, המהווים בית גידול לאין-סוף מינים של אלמוגים ויצורים ימיים מרהיבים.

מזה שנים הריף מוזכר כבעל רגישות סביבתית גבוהה במיוחד. הקונצנזוס המקובל הוא כי הריף חווה תהליכי הידרדרות אקולוגית מהירה, הנקשרים לרוב להשפעה אנושית – בעיקר כתוצאה מהתחממות גלובלית ומזיהום מי הריף משפכים שמקורם בחוף האוסטרלי.

בשנת 2009 פרסם המכון האוסטרלי למדעי הים (AIMS) מאמר מכונן במגזין Science. מאות ליבות מאובני אלמוגים נקדחו לטובת שחזור היסטורי של קצב הצמיחה בריף, והממצאים היו מבהילים. לאחר יציבות של מאות שנים, החל משנת 1990 נרשמה צניחה דרסטית של 15 אחוז בקצב צמיחת האלמוגים. מסקנות המחקר טענו כי ההסברים הסבירים להידרדרות הם התחממות גלובלית ו"התחמצנות האוקיאנוס". המאמר הִכה גלים – וחיזק את הקונצנזוס הרחב כי מצבו של הריף חמור ביותר ויש לפעול בדחיפות לשימורו.

רוצה לקרוא עוד?

להמשך קריאה הירשמו או התחברו

ריף השונית הגדול של אוסטרליה | צילום: [Shutterstock]

ריף השונית הגדול של אוסטרליה | צילום: [Shutterstock]

בזכות האמון שהפגין נחשון בן עמינדב במשה ובאלוהים, הים נבקע ובני ישראל יצאו לחירות. לולא אותו רגע של אמונה, ייתכן שגורלנו היה שונה

המגפה החברתית השקטה של זמננו | דעה

ד"ר משה רט

מה שבאמת דחף את נמסיס להשלים את השינוי ולהפוך לגיבור היה אמונתו התמימה של סם בכך שהוא כזה מלכתחילה

אפקט פיגמליון וגיבורי-על: כשאמונה יוצרת גבורה

ד"ר משה רט

מחנה פליטים בג׳באליה

הצעד הראשון ליישום תוכנית ההגירה של טראמפ | דעה

יוני בן מנחם

אילוסטרציה: מגזין אפוק

אף אחד אחר לא אחראי על המעשים שלנו | דעה

ד"ר משה רט

צילום: Shutterstock

איום בגובה נמוך: מי עומד מאחורי הרחפנים הבלתי מזוהים מעל הבסיסים האמריקניים בארה"ב ובאירופה?

אורן שלום

צמצום הכנסות המט"ח יגרום להיחלשות המטבע שיגרום לשורה של בעיות כלכליות

כיצד אמור להתמוטט המשטר האיראני? | פרשנות

איל לוינטר

הירשמו לניוזלטר שלנו וקבלו תוכן חדש למייל מדי חודש

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