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Hydrological Management for Submersed Aquatic Vegetation in South Carolina Coastal Impoundments
Wildlife Society Bulletin ( IF 1.5 ) Pub Date : 2020-08-15 , DOI: 10.1002/wsb.1116
Beau A. Bauer 1 , Richard M. Kaminski 2 , J. Drew Lanham 3 , Patrick D. Gerard 4 , Ernie P. Wiggers 1
Affiliation  

We conducted a field experiment to test effects of complete drawdown to dried substrates versus partial (shallow water, 0–10 cm) drawdown on widgeongrass (Ruppia maritima) and other native submersed aquatic vegetation (SAV) biomass (dry) in managed brackish tidal impoundments (hereafter, impoundments) in the Ashepoo, Combahee, and Edisto Rivers Basin, South Carolina, USA. We sampled SAV in 20 impoundments (complete drawdown, n = 8; partial drawdown, n = 12) during August 2016, November 2016, January 2017, and April 2017. We detected a drawdown effect on SAV biomass for August 2016 samples before Hurricane Matthew in October 2016, which subsequently confounded drawdown treatment effects. Mean SAV biomass in August 2016 was nearly 4 times greater in partially drawndown (urn:x-wiley:19385463:media:wsb1116:wsb1116-math-0001 = 35.98 g/m2 ± 6.05 [SE]) than completely drawndown impoundments (urn:x-wiley:19385463:media:wsb1116:wsb1116-math-0002 = 9.52 g/m2 ± 7.41). We suggest partial drawdowns to promote SAV biomass in coastal South Carolina and other south Atlantic brackish wetlands. We also encourage managers to conduct complete drawdowns periodically to reduce flocculent soils and organic matter and promote rooting by SAV. Our results may aid the Atlantic Coast Joint Venture of the North American Waterfowl Management Plan to estimate potential energetic carrying capacity of brackish impoundments in South Carolina and elsewhere as applicable for wintering ducks and American coots (Fulica americana), and to illustrate the effect of a hurricane that decreases SAV biomass in impounded wetlands. © 2020 The Wildlife Society.

中文翻译:

南卡罗来纳州沿海蓄水区淹没水生植被的水文管理

我们进行了野外试验,以测试在咸淡水管理的蓄水库中,对干底物的完全压降与部分(浅水,0–10 cm)压降对维吉翁草(Ruppia maritima)和其他天然潜水水生植物(SAV)生物量(干)的影响。 (以下称水库)位于美国南卡罗来纳州的阿谢普(Ashepoo),孔巴海(Combahee)和埃迪斯托(Edisto)流域。我们以20个蓄水量对SAV进行了采样(完全减少,n  = 8;部分减少,n = 12)在2016年8月,2016年11月,2017年1月和2017年4月。我们在2016年10月的马修飓风之前检测到2016年8月样本对SAV生物量的下降效应,随后混淆了下降处理效应。2016年8月,SAV的平均生物量部分减少(缸:x-wiley:19385463:media:wsb1116:wsb1116-math-0001 = 35.98 g / m 2  ±6.05 [SE]),是完全减少的蓄水量(:x-wiley:19385463:media:wsb1116:wsb1116-math-0002 = 9.52 g / m 2)的近4倍 ±7.41)。我们建议部分缩水以促进南卡罗来纳州沿海地区和其他南大西洋微咸湿地的SAV生物量。我们还鼓励管理人员定期进行完整的提款,以减少絮状土壤和有机物,并通过SAV促进生根。我们的研究结果可能有助于大西洋海岸合资北美水禽管理计划的估计在南卡罗来纳州苦咸水蓄水的潜力充满活力的承载能力和其他地方适用于越冬鸭和美国黑鸭(大蜗牛美洲),并以说明的效果飓风会减少蓄积湿地中SAV的生物量。©2020野生动物协会。
更新日期:2020-10-02
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