Growth rates of baldcypress (Taxodium distichum) seedlings in a treated effluent assimilation marsh
Growth rates of baldcypress (Taxodium distichum) seedlings in a treated effluent assimilation marsh
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DOI：
10.1016/j.ecoleng.2010.11.012
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发表时间：
2011-04
影响因子：
3.8
通讯作者：
Christopher J. Lundberg;G. Shaffer;W. B. Wood;J. Day
中科院分区：
文献类型：
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作者：
Christopher J. Lundberg;G. Shaffer;W. B. Wood;J. Day
湿地已被证明有效地改善了经处理的废水的水质，这反过来又促进了初级生产力的提高和垂直增长。在美国路易斯安那州东南部的一个污水同化沼泽和一个对照沼泽的4个亚单元中，种植了不同条件(裸根和盆栽)下的杉木幼苗，并在一个生长季节内监测了地径的生长。同化亚基苗木的平均地径生长量为16.1(±1.4)mm~9.5(±0.9)mm，而对照湿地苗木的平均地径生长量为6.4(±0.9)mm。距排污口最近的苗木地径生长量(18.1±2.6)大于距排污口700m的苗木(8.0±0.9)，地径生长量随距离的增加而递减。盆栽苗的生长量(5月龄和10月龄分别为19.1±1.0和20.6±1.0)大于裸根苗(1年生和2年生分别为4.6±0.6和4.0±0.4)。在同化沼泽地种植柏树幼苗可以成为路易斯安那州沿海地区的有效恢复工具，这将提供飓风防护和改善地表水质量。污水处理湿地为路易斯安那州滨海水柏(T.distichum)-水草湿地的恢复提供了有效的工具。
Wetlands have proven effective at improving water quality of treated wastewater effluent, which in turn promotes increased primary productivity and vertical accretion. Baldcypress (Taxodium distichum) seedlings grown under different conditions (bare root and potted) were planted in four subunits of an effluent assimilation marsh and a control marsh in southeast Louisiana, USA, and basal diameter growth was monitored over one growing season. Mean basal diameter growth for seedlings in the assimilation subunits ranged from 16.1 (±1.4)mm to 9.5 (±0.9)mm, whereas growth for seedlings planted in the control marsh was 6.4 (±0.9)mm. Seedlings planted nearest the outfall experienced greater basal diameter growth (18.1±2.6) compared to those planted 700m away (8.0±0.9), with growth generally decreasing with distance. Potted seedlings experienced greater growth (19.1±1.0 and 20.6±1.0 for five-month-olds and ten-month olds, respectively) than bare root seedlings (4.6±0.6 and 4.0±0.4 for one-year-olds and two-year olds, respectively). Planting assimilation marshes with baldcypress seedlings can be an effective restoration tool for coastal Louisiana, which will provide hurricane protection and improved surface water quality. Wastewater treatment wetlands may offer an effective tool for restoring coastal baldcypress (T. distichum)–water tupelo (Nyssa aquatic) swamps in Louisiana.