کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4539667 1626652 2014 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
2000 years of sustainable use of watersheds and coral reefs in Pacific Islands: A review for Palau
ترجمه فارسی عنوان
2000 سال استفاده پایدار از حوضه آبخیز و صخره های مرجانی در جزایر اقیانوس آرام: بررسی برای پالائو
کلمات کلیدی
رسوبگذاری، میدان تارو صخره های مرجانی، پایداری، پالائو
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات زمین شناسی
چکیده انگلیسی

In Palau and everywhere in the world, coastal coral reefs are threatened by sedimentation resulting from land clearing in the watersheds. Palau's largest island of Babeldaob is particularly susceptible to significant erosion due to its steep topography, high rainfall, and highly erodible volcanic soil. Previous studies have shown the damaging impacts of sedimentation on coral reefs around Babeldaob Island. Related studies conducted in Micronesia have also documented that mangroves can trap about 30% of the fine eroded sediment from land. This paper examines the sediment trapping capability of cultivated wetlands, in particular taro (Colocasia esculenta) fields, which are natural wetlands used to grow taro, a main staple crop for the population. A 7-months long field study was undertaken to quantify the sediment accumulation rate for taro fields and to determine their sediment trapping efficiency. The results showed that the taro fields were able to trap on average 90% of sediment, therefore sheltering coastal coral reefs and their fisheries from the negative impacts of terrestrial runoff. Based on the results of this study, we suggest that the combined sediment trapping capacity of taro fields and mangroves helped reduce sedimentation on coral reefs around Babeldaob Island. This enabled human settlement for over 2000 years on a small Pacific Island with the main staple food being taro for starch and reef fish for protein.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Estuarine, Coastal and Shelf Science - Volume 144, 1 May 2014, Pages 19–26
نویسندگان
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