题目

英语翻译
Light limiting thresholds for submerged aquatic vegetation in a blackwater river
Dean R.Dobberfuhl
St.Johns River Water Management District,4049 Reid Street,Palatka,FL 32178,United States
Received 19 January 2006; received in revised form 16 November 2006; accepted 3 January 2007
Abstract
Field-based monitoring data were used to estimate the limiting light threshold for Vallisneria americana,the dominant species,in the St.Johns River,Florida.There was a considerable range of threshold estimates (0.5–35% of surface light) among individual observations.Light threshold calculations were divided into low- and high-salinity groups of sites.The field-based mean threshold for 1998–2004 was 9% for low-salinity (0.5 ppt annual mean) had a higher mean light threshold of 14%.A separate analysis of the freshwater Crescent Lake suggested a light threshold of 9%.Increased epiphyte biomass during the drought may have accounted for the majority of the higher light requirem

提问时间：2020-08-07

答案

光限制阈值的沉水植物在黑水河流
迪恩河Dobberfuhl
圣约翰斯河水管理区,4049里德街,帕拉特卡,佛罗里达州32178,美国
二零零六年一月十九日收到的,在修订的形式收到的06年11月16日,接受2007年1月3日
摘要
基于实地的监测数据来估计的限制为美洲苦草,优势种在圣约翰河,佛罗里达州,光阈值.有一个阈值估计在个别意见（0.5-35％的表面光）相当广泛.光阈值的计算分为低和高盐度网站群.该油田为基础的1998-2004年的平均阈值是9的低矿化度“（