secchi disk 中文意思是什麼
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Taxonomic groups of zoobenthos were significantly correlated with biomass of submersed aquatic macrophytes, depths, secchi disk transparencies, total phosphorus and total nitrogen contents
底棲動物各個類群的現存量與水草生物量、水深、透明度、總磷和總氮的關系均較密切。 -
For the relationships between zoobenthos and environmental factors, results showed that zoobenthic standing crops were positively correlated with submersed aquatic macrophytes, total phosphorus and total nitrogen contents but were negatively correlated with depths and secchi disk transparencies
環境分析表明底棲動物總的現存量與水草生物量、總磷總氮含量均正相關，與水深、透明度均負相關。 -
Slowly lower the secchi disk into the water until it disappears, and note the depth
一個黑白相間既圓板，水平放入水底，慢慢下降，直到完全睇唔見，立即記下水深
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