The effect of fine-scale sampling frequency on estimates of beach litter accumulation
The effect of fine-scale sampling frequency on estimates of beach litter accumulation
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DOI：
10.1016/j.marpolbul.2014.08.036
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发表时间：
2014-11-15
影响因子：
5.8
通讯作者：
Moloney, Coleen L.
中科院分区：
文献类型：
--
作者：
Ryan, Peter G.;Lamprecht, Annerie;Moloney, Coleen L.
南非两个桑迪的凋落物积累率的估计采样频率的影响。初始清洁后，所有直径>10 mm的制造物品均以每日或每周清洁交替的方式收集。每日取样收集的窝仔项目是每周取样的2.5倍（范围2.1-3.4），按质量计是窝仔的1.7倍（1.3-2.3）。泡沫聚苯乙烯等低密度物品显示出更大的差异（比每日取样的物品多4-5倍），可能是由于轻质垃圾物品周转更快。每周样本的变化并不总是低于每日的估计，这表明，不太频繁的样本，只有部分整合垃圾动态的短期波动。研究人员利用海滩积累数据推断近岸海洋垃圾趋势，或评估减少垃圾措施的效力，需要确保采样频率的一致性。(C)2014爱思唯尔有限公司版权所有。
The effect of sampling frequency on estimates of the rate of litter accumulation was determined for two South African sandy beaches. After initial cleaning, all manufactured items >10 mm diameter were collected in alternating bouts of daily or weekly cleanups. Daily sampling collected 2.5 (range 2.1-3.4) times more litter items than weekly samples and 1.7 (1.3-2.3) times more litter by mass. Low density items such as foamed polystyrene showed a greater differential (4-5 times more items from daily sampling), presumably due to faster turnover of lightweight litter items. Variation in weekly samples was not consistently less than daily estimates, suggesting that less frequent samples only partly integrate short-term fluctuations in litter dynamics. Researchers using beach accumulation data to infer trends in nearshore marine litter, or to assess the efficacy of litter mitigation measures, need to ensure consistency in sampling frequency. (C) 2014 Elsevier Ltd. All rights reserved.